阅读说明：本技术 光源设备和投影显示设备 (Light source apparatus and projection display apparatus ) 是由 西正太 高沢丈晴 石毛正裕 于 2020-05-26 设计创作，主要内容包括：根据本公开内容的实施方式的光源设备包括：支撑基板,所述支撑基板包括位于一个表面上的荧光体层；驱动单元,所述驱动单元使支撑基板被旋转驱动；第一支撑构件,所述第一支撑构件与所述支撑基板的所述一个表面相对的另一表面相对；多个第一散热构件,所述多个第一散热构件根据与荧光体层的距离而各自具有彼此不同的散热性能,所述多个第一散热构件同心圆状地设置在所述支撑基板的所述另一表面上；和多个第二散热构件,所述多个第二散热构件同心圆状地设置在第一支撑构件的与支撑基板相对的表面上,所述多个第二散热构件与所述多个第一散热构件交替地设置。(The light source apparatus according to an embodiment of the present disclosure includes: a support substrate including a phosphor layer on one surface; a driving unit that rotationally drives the support substrate; a first support member opposing the other surface of the support substrate opposing the one surface; a plurality of first heat dissipation members each having a heat dissipation performance different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and a plurality of second heat dissipation members concentrically disposed on a surface of the first support member opposite to the support substrate, the plurality of second heat dissipation members being alternately disposed with the plurality of first heat dissipation members.)

1. A light source apparatus comprising:

a support substrate having a phosphor layer on one surface;

a driving unit that rotationally drives the support substrate;

a first support member disposed face to face with the other surface opposite to the one surface of the support substrate;

a plurality of first heat dissipation members having heat dissipation properties different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and

a plurality of second heat dissipation members concentrically disposed on a surface of the plurality of first support members facing the support substrate, the plurality of second heat dissipation members being alternately arranged with the plurality of first heat dissipation members.

2. The light source apparatus according to claim 1, wherein, among the plurality of first heat dissipation members, a heat dissipation property of a first heat dissipation member near the phosphor layer is higher than heat dissipation properties of other first heat dissipation members.

3. The light source apparatus according to claim 2, wherein a thickness of the first heat dissipation member in the vicinity of the phosphor layer is larger than a thickness of the other first heat dissipation members.

4. The light source apparatus according to claim 2, wherein a thickness of the plurality of first heat dissipation members decreases with increasing distance from the phosphor layer.

5. The light source apparatus according to claim 2, wherein a length of the first heat dissipation member in the vicinity of the phosphor layer is larger than lengths of the other first heat dissipation members.

6. The light source apparatus according to claim 2, wherein heights of the plurality of first heat dissipation members decrease with increasing distance from the phosphor layer.

7. The light source apparatus according to claim 1, wherein the support substrate and the plurality of first heat dissipation members are separately formed.

8. The light source apparatus according to claim 1, wherein the plurality of first heat dissipation members are integrally formed with the support substrate.

9. The light source apparatus according to claim 1, wherein the plurality of first heat dissipation members are arranged so as to avoid a formation region of the phosphor layer.

10. The light source apparatus of claim 1,

the phosphor layer has an annular shape, and

the light source device further includes:

one or more third heat discharging members disposed on the one surface of the support substrate concentrically with the phosphor layer,

a second support member disposed in face-to-face relation with the one surface of the support substrate, an

One or more fourth heat dissipation members facing the one or more third heat dissipation members, the one or more fourth heat dissipation members being disposed on a surface of the second support member facing the support substrate.

11. The light source apparatus according to claim 10, wherein, among the plurality of third heat dissipation members, a heat dissipation property of a third heat dissipation member near the phosphor layer is higher than heat dissipation properties of other third heat dissipation members.

12. The light source apparatus according to claim 11, wherein a thickness of the third heat dissipation member in the vicinity of the phosphor layer is larger than a thickness of the other third heat dissipation members.

13. The light source apparatus according to claim 11, wherein a thickness of the plurality of third heat discharging members decreases with increasing distance from the phosphor layer.

14. The light source apparatus according to claim 11, wherein a length of the third heat dissipation member in the vicinity of the phosphor layer is larger than lengths of the other third heat dissipation members.

15. The light source apparatus of claim 11, wherein the height of the plurality of third heat spreading members decreases with increasing distance from the phosphor layer.

16. The light source apparatus according to claim 10, wherein the first support member and the second support member are included in a housing that accommodates a support substrate having the phosphor layer, the plurality of first heat dissipation members, and the one or more third heat dissipation members.

17. The light source apparatus of claim 16, wherein the outside of the housing further has a heat dissipation structure.

18. The light source apparatus of claim 16, wherein the housing has a sealed structure.

19. The light source apparatus of claim 16, wherein the housing is further sealed with helium gas.

20. A projection display device comprising:

a light source device;

an image generation optical system that generates image light by modulating light from the light source device based on an input image signal; and

a projection optical system that projects the image light generated by the image generation optical system,

the light source apparatus includes:

a support substrate having a phosphor layer on one surface;

a driving unit that rotationally drives the support substrate;

a first support member disposed face to face with the other surface opposite to the one surface of the support substrate;

a plurality of first heat dissipation members having heat dissipation properties different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and

a plurality of second heat dissipation members concentrically disposed on a surface of the plurality of first support members facing the support substrate, the plurality of second heat dissipation members being alternately arranged with the plurality of first heat dissipation members.

Technical Field

The present disclosure relates to: a light source apparatus comprising a rotator as a wavelength converter, the rotator comprising a phosphor layer as a light emitting unit; and a projection display apparatus including the light source apparatus.

Background

In recent years, a laser-phosphor system light source apparatus has been used as a light source of a projector. In the laser-phosphor system light source apparatus, in order to prevent deterioration or breakage of output due to dust, a method of accommodating a wheel to which a phosphor is fixed in a sealed case is employed. In such a light source apparatus, for example, a light source apparatus is disclosed in which a plurality of concentric heat dissipation members provided on a sealed case and a plurality of concentric heat dissipation members provided on a wheel side are combined (for example, see patent document 1). In such a light source apparatus, by utilizing taylor vortices generated between the heat dissipating members when the wheel side is rotationally driven, thermal conductivity between the heat dissipating members is improved and the light emitting unit of the phosphor is efficiently cooled.

Reference list

Patent document

Patent document 1: international publication No. WO 2018/116689

Disclosure of Invention

For a light source device of a projector, it is desired to increase the power of the light source and to miniaturize it, and further to improve the heat dissipation efficiency.

It is desirable to provide a light source apparatus and a projection display apparatus capable of improving heat dissipation efficiency.

The light source apparatus according to an embodiment of the present disclosure includes: a support substrate having a phosphor layer on one surface; a driving unit that rotationally drives the support substrate; a first support member disposed face to face with the other surface opposite to the one surface of the support substrate; a plurality of first heat dissipation members having heat dissipation properties different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and a plurality of second heat dissipation members concentrically disposed on a surface of the first support member facing the support substrate, the plurality of second heat dissipation members being alternately arranged with the plurality of first heat dissipation members.

A projection display device according to an embodiment of the present disclosure includes: a light source device; an image generation optical system that generates image light by modulating light from the light source device based on an input image signal; and a projection optical system that projects the image light generated by the image generation optical system. The light source apparatus included in the projection display apparatus includes the same components as the aforementioned light source apparatus according to the embodiment of the present disclosure.

In the light source apparatus according to the embodiment of the present disclosure and the projection display apparatus according to the embodiment of the present disclosure, a plurality of concentric first heat dissipation members each having a heat dissipation performance different from each other according to a distance from the phosphor layer are provided on a back surface (the other surface) of the support substrate including the phosphor layer. Specifically, as the distance from the phosphor layer is reduced, a heat dissipation member having higher heat dissipation performance is provided. This lowers the temperature of the phosphor layer due to the thermal diffusion effect while suppressing an increase in weight.

Drawings

Fig. 1 is a schematic sectional view of a configuration example of a phosphor wheel and a housing included in a light source apparatus according to a first embodiment of the present disclosure.

Fig. 2A is a schematic plan view of the phosphor wheel shown in fig. 1 as viewed from the front surface side.

Fig. 2B is a schematic plan view of the phosphor wheel shown in fig. 1 as viewed from the back surface side.

Fig. 3 is a schematic cross-sectional view of another configuration example of a phosphor wheel and a housing included in a light source apparatus according to a first embodiment of the present disclosure.

FIG. 4A is a schematic cross-sectional view showing an example of a process for producing the phosphor wheel shown in FIG. 1.

Fig. 4B is a schematic cross-sectional view of a process subsequent to fig. 4A.

FIG. 5 is a characteristic diagram showing a warped wheel base plate.

Fig. 6 is a schematic diagram of an example of the overall configuration of a light source apparatus including the phosphor wheel shown in fig. 1.

Fig. 7 is a schematic sectional view of the configuration of a phosphor wheel and a housing included in a light source apparatus according to a second embodiment of the present disclosure.

Fig. 8 is a schematic sectional view of the configuration of a phosphor wheel and a housing included in a light source apparatus according to a third embodiment of the present disclosure.

Fig. 9 is a schematic cross-sectional view of the configuration of a phosphor wheel and a housing included in a light source apparatus according to modification 1 of the present disclosure.

Fig. 10 is a schematic cross-sectional view of the arrangement of a phosphor wheel and a housing included in a light source apparatus according to modification 2 of the present disclosure.

Fig. 11 is a schematic cross-sectional view of the arrangement of a phosphor wheel and a housing included in a light source apparatus according to modification 3 of the present disclosure.

Fig. 12 is a schematic cross-sectional view of the configuration of a phosphor wheel and a housing included in a light source apparatus according to modification 4 of the present disclosure.

Fig. 13 is a schematic sectional view of a configuration example of a phosphor wheel and a housing included in a light source apparatus according to modification 5 of the present disclosure.

Fig. 14 is a schematic cross-sectional view of another configuration example of a phosphor wheel and a housing included in a light source apparatus according to modification 5 of the present disclosure.

Fig. 15 is a schematic sectional view of a configuration example of a phosphor wheel and a housing included in a light source apparatus according to modification 6 of the present disclosure.

Fig. 16 is a schematic cross-sectional view of another configuration example of a phosphor wheel and a housing included in a light source apparatus according to modification 6 of the present disclosure.

Fig. 17 is a schematic cross-sectional view of the arrangement of a phosphor wheel and a housing included in a light source apparatus according to modification 7 of the present disclosure.

Fig. 18 is a schematic diagram of another example of the overall configuration of a light source apparatus including the phosphor wheel shown in fig. 1.

Fig. 19 is a schematic diagram of one example of a configuration example of a projection display device including the light source device shown in fig. 6.

Fig. 20 is a schematic diagram of another example of a configuration example of a projection display device including the light source device shown in fig. 6.

Detailed Description

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The following description is a specific example of the present disclosure, but the present disclosure is not limited to the following embodiments. Further, the present disclosure is not limited to the arrangement, the dimensions, the dimensional ratios, and the like of the constituent elements shown in the drawings. Note that the description is given in the following order.

1. First embodiment (example in which a plurality of heat dissipation members whose heat dissipation properties differ according to the distance from the phosphor layer are provided on the back surface of the wheel base plate)

1-1. arrangement of phosphor wheel and its periphery

1-2. method for manufacturing phosphor wheel

1-3. arrangement of light source device

1-4. working and Effect

2. Second embodiment (example of phosphor wheel including a plurality of heat radiating members having fins each having a different thickness)

3. Third embodiment (example of phosphor wheel including a plurality of heat radiating members having fins each having a different length and thickness)

4. Modification example

4-1. modified example 1 (example in which a plurality of heat radiating members are integrally formed)

4-2 modified example 2 (example in which the outermost heat-radiating member is provided integrally with the wheel base)

4-3 variation 3 (example in which a plurality of heat-dissipating members are integrally formed with a wheel base plate)

4-4 variation 4 (example in which another heat-dissipating member is further provided on the inner periphery than the phosphor layer)

4-5 variation 5 (example in which an inclined surface is provided on a peripheral edge portion of a case)

4-6 variation 6 (example in which another heat-dissipating member is further provided on the front surface of the wheel base plate)

4-7 modification 7 (example of Transmission type phosphor wheel)

4-8 variation 8 (another configuration example of light source device)

5. Application example (projection display equipment)

<1 > first embodiment >

Fig. 1 schematically shows an example of a sectional configuration of a wavelength converter (phosphor wheel 10A) and a housing 20 included in a light source apparatus (light source apparatus 1) according to a first embodiment of the present disclosure. Fig. 2A schematically shows a planar configuration of the phosphor wheel 10A shown in fig. 1 as viewed from the front surface side. Fig. 2B schematically shows a planar configuration of the phosphor wheel 10A shown in fig. 1 as viewed from the back surface side. Fig. 1 shows a cross-sectional configuration taken along the line I-I shown in fig. 2A and 2B. Further, fig. 2A and 2B each show a portion of the respective fins 132A, 132B, and 132C of the heat dissipation members 13A, 13B, and 13C. The phosphor wheel 10A is used, for example, as a light emitting device (wavelength converter) included in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later (for example, see fig. 6 and 18).

The light source apparatus 1 according to the present embodiment includes: a phosphor wheel 10A that converts the wavelength of excitation light EL (e.g., blue light) output from a light source unit 1110 described later into the wavelength of fluorescence FL (e.g., yellow light) and outputs the wavelength-converted light; and a housing 20 accommodating the phosphor wheel 10A. The phosphor wheel 10A has a phosphor layer 12 fixed to, for example, the front surface (one surface; surface 11S1) of a wheel base plate 11 having a circular planar shape. A plurality of concentric heat dissipation members 13 centered on the rotation center (O) of the wheel base plate 11 are provided on the back surface (the other surface; surface 11S 2). A plurality of heat dissipation members (a plurality of fins 221) are disposed inside the case 20. The plurality of heat discharging members (the plurality of fins 221) and the plurality of heat discharging members 13 are disposed in a nested manner. In the present embodiment, three heat dissipation members 13A, 13B, and 13C whose heat dissipation properties are different depending on the distance from the phosphor layer 12 are provided as the plurality of heat dissipation members 13 on the back surface (surface 11S2) of the wheel substrate 11. A plurality of heat radiation members 13 different in heat radiation performance from each other are provided on the back surface (surface 11S2) of the wheel base 11. It should be noted that fig. 1, 2A, and 2B each schematically show the configuration of the phosphor wheel 10A and the housing 20, and may be different from the actual size and shape.

(1-1. arrangement of phosphor wheel and periphery thereof)

As described above, in the phosphor wheel 10A, the phosphor layer 12 is disposed on the front surface (surface 11S1) of the circular wheel substrate 11, and the two heat dissipation members 13A, 13B, and 13C are disposed on the back surface (surface 11S2) of the circular wheel substrate 11. The phosphor layer 12 is formed in a ring shape, for example, around the rotation center O of the wheel base 11. The wheel base plate 11 is fixed to the motor 14, and, for example, during operation of the light source apparatus 1, the wheel base plate 11 is rotatable in the arrow C direction about an axis J14A passing through the rotation center (O). The phosphor wheel 10A is rotated to prevent a decrease in light conversion efficiency while suppressing a local temperature increase with the application of the excitation light EL and maintaining structural stability.

The wheel substrate 11 serves as a substrate supporting the phosphor layer 12, and also serves as a heat dissipation member. For example, the wheel base 11 includes an inorganic material (such as a metal material) and a ceramic material. As a constituent material of the wheel base plate 11, a material having high thermal conductivity is preferable. Specifically, examples of the metal material in the wheel substrate 11 include simple metal substances such as aluminum (Al), copper (Cu), molybdenum (Mo), tungsten (W), cobalt (Co), chromium (Cr), platinum (Pt), tantalum (Ta), lithium (Li), zirconium (Zr), ruthenium (Ru), rhodium (Rh), and palladium (Pd), or alloys including one or more metals. Alternatively, as the metal material in the wheel base 11, an alloy such as CuW containing 80 at% or more W and CuMo containing 40 at% or more Mo may be used. Examples of ceramic materials include: and a ceramic material containing silicon carbide (SiC), aluminum nitride (AlN), beryllium oxide (BeO), a composite material of Si and SiC, or a composite material of SiC and Al, wherein the content of SiC is 50% or more. Further, quartz and glass may be used in addition to Si, a simple substance of SiC, and a crystalline material such as diamond or sapphire. In particular, as the constituent element of the wheel substrate 11, simple substances of Mo, Si, and W having high thermal conductivity are preferable.

Phosphor layer 12 the phosphor layer 12 contains a plurality of phosphor particles, and is fixed to the front surface (surface 11S1) of the wheel base 11. For example, the phosphor layer 12 is preferably formed in a plate shape and contains a so-called ceramic phosphor or a binder-type porous phosphor. The binder binds one phosphor particle to another phosphor particle adjacent to the one phosphor particle. For example, the binder includes a crosslinked body of an inorganic material (such as water glass). Water glass means a silicate compound, also called sodium silicate, potassium silicate or sodium silicate (silicate soda), and means anhydrous silicic acid (SiO) therein₂) With sodium oxide (Na)₂O) or potassium oxide (K)₂O) liquids mixed in predetermined proportions.The water glass has the molecular formula of Na₂O·nSiO₂And (4) showing.

The phosphor particles include a particulate phosphor that absorbs excitation light EL (e.g., laser light) applied from the outside to emit fluorescent light FL. For example, the phosphor particles include a fluorescent material excited by blue laser light having a wavelength in a blue wavelength range (for example, from 400nm to 470nm) to emit yellow fluorescence (light having a wavelength range between a red wavelength range and a green wavelength range). As such a fluorescent material, for example, a YAG (yttrium aluminum garnet) -based material is used.

Note that, as shown in fig. 3, for example, the phosphor layer 12 may be fixed to the wheel base 11 with the reflective film 15 interposed therebetween. The reflective film 15 serves to reflect the excitation light EL applied from the outside and the fluorescent light FL emitted from the phosphor layer 12, thereby improving the light emission efficiency in the phosphor wheel 10A. For example, the reflective film 15 includes a metal film containing a metal element such as aluminum (Al), silver (Ag), or titanium (Ti) in addition to the dielectric multilayer film. Note that in the case where the wheel substrate 11 includes a material having light reflectivity, the reflection film 15 may be appropriately omitted.

As described above, in the phosphor wheel 10A, for example, three heat dissipation members 13A, 13B, and 13C are provided as the plurality of heat dissipation members 13 on the back surface (surface 11S2) of the wheel base 11. The heat dissipation members 13A, 13B, and 13C each correspond to a specific example of "first heat dissipation member" of the present disclosure. As described above, the heat dissipation properties of the heat dissipation members 13A, 13B, and 13C are different depending on the distance from the phosphor layer 12. Specifically, the heat radiation performance of the heat radiation member 13A is the highest, the heat radiation performance of the heat radiation member 13B is the next to the heat radiation performance, and the heat radiation performance of the heat radiation member 13C is the lowest. In the present embodiment, the heat dissipation member 13A having the highest heat dissipation performance is disposed at a position closest to the phosphor layer 12 as a heat source, for example, immediately below the phosphor layer 12 as shown in fig. 1, and the heat dissipation member 13C having the lowest heat dissipation performance is disposed at a position farthest from the phosphor layer 12, for example, on a peripheral edge portion of the wheel substrate 11 as shown in fig. 1. The heat radiation members 13A, 13B, and 13C are disposed in order from the rotation center (O) of the wheel base plate 11.

The heat dissipation members 13A, 13B, and 13C include fixing portions 131(131a, 131B, and 131C) joined to the back surface (surface 11S2) of the wheel base 11 and fins 132(132a, 132B, and 132C) bent from the fixing portions 131 substantially parallel to the rotation axis J14 of the phosphor wheel 10A. The heat dissipation members 13A, 13B, and 13C. The heat radiation members 13A, 13B, and 13C are joined to the wheel base 11 via fixing portions 131a, 131B, and 131C, respectively. As a result, for example, the heat dissipation members 13A, 13B, and 13C can rotate about the shaft J14A together with the wheel base plate 11 during operation of the light source apparatus 1. As described above, the fins 132a, 132b, and 132c are respectively curved in a direction substantially parallel to the rotation axis J14 of the phosphor wheel 10A, and each form a cylindrical surface substantially parallel to the rotation axis J14. The cylindrical surface is preferably formed as a continuous surface around the rotation axis J14 as a center, but may have a cutout extending in the rotation axis direction at one or more points, for example.

In the present embodiment, the heat dissipation performance of each of the heat dissipation members 13A, 13B, and 13C is adjusted by the respective lengths of the fins 132a, 132B, and 132C, for example. Specifically, the heat dissipation members 13A, 13B, and 13C respectively have the fin 132a having the length 11, the fin 132B having the length 12, and the fin 132C having the length 13, and satisfy the length 11 > 12 > 13. Therefore, the length of the fin 132a of the heat dissipation member 13A disposed closest to the phosphor layer 12 is longest, and the lengths of the fins 132b and 132c become shorter as the distance from the phosphor layer 12 increases. This makes it possible to reduce the weight of the phosphor wheel 10A while maintaining the cooling efficiency of the heat generating body (phosphor layer 12) by the heat radiation members 13A, 13B, and 13C.

The heat dissipation members 13A, 13B, and 13C each preferably contain a material having high thermal conductivity. Specifically, for example, the heat dissipation members 13A, 13B, 13C each desirably contain pure aluminum, an aluminum alloy, a copper alloy (such as beryllium copper), a carbon material, graphite, or the like. It should be noted that the heat dissipation members 13A, 13B, and 13C may include the same material, or may each include a material different from each other.

The housing 20 accommodates the phosphor wheel 10A including the heat dissipation member 13 and prevents dust from adhering to the phosphor wheel 10A. The housing 20 has a front portion 21, a rear portion 22 and side portions 23. On the front face portion 21, a lens 24 is provided at a position facing the phosphor layer 12 as a transmission portion transmitting the excitation light EL and the fluorescence FL. For example, the back surface portion 22 is provided with, for example, two fins 221a and 221b centered on the rotation center (O) of the wheel base plate 11 as the plurality of concentric fins 221. That is, the back surface portion 22 of the case 20 corresponds to a "first support member" of the present disclosure, and the fins 221a and 221b each correspond to a specific example of a "second heat dissipation member" of the present disclosure.

The fins 221a and 221b are each formed integrally with the back face portion 22 with the same length, and each form a cylindrical surface substantially parallel to the rotation axis J14 of the phosphor wheel 10A. The cylindrical surfaces of the fins 221a and 221B are each preferably formed as a continuous surface around the rotation axis J14 as a center in a similar manner to the fins 132a, 132B, 132C of the heat radiation members 13A, 13B, 13C, but may have a cutout extending in the rotation axis direction at one or more points, for example. That is, the fins 132a, 132B, 132C and the fins 221a and 221B of the heat dissipation members 13A, 13B, and 13C have surfaces that are opposite to each other and substantially parallel to each other.

In the present embodiment, the fins 221a and 221B are disposed in a nested manner with the fins 132a, 132B, and 132C of the heat dissipation members 13A, 13B, and 13C. Specifically, the fins 132a, 132b, and 132c and the fins 221a and 221b are arranged in the order of the fin 132a, the fin 221a, the fin 132b, the fin 221b, and the fin 132c from the rotation center (O) of the wheel base 11.

The positions of the fins 132a, 221a, 132B, 221B, and 132c are preferably set in such a manner that, for example, the aspect ratio (a/B) of the distance (a) to the distance (B) is 2 or more. The distance (a) is a distance of facing surfaces of the fin 132a and the fin 221a facing each other, and the distance (B) is a distance between the fin 132a and the fin 221 a. Similarly, the aspect ratio of the distance of the facing surfaces of the fins 132b and 221b facing each other to the distance between the fins 132b and 221b is preferably 2 or more. As for the fin 132c, it is preferable that the distance between the fin 132c and the object face of the side portion 23 of the housing 20 and the distance between the fin 132c and the side portion 23 have similar configurations.

As a result, when the phosphor wheel 10A is rotationally driven, taylor vortices are generated in the fluid (for example, air) between the fins 132a and 221a, between the fins 132b and 221b, and between the fins 132c and the side portion 23. Taylor vortices are generated by centrifugal forces acting on the gas. Therefore, in the present embodiment, the fins combined in the above aspect ratio have the following configuration: the fin (fin 221) on the outer peripheral side is fixed, and the fin (fin 132) on the inner peripheral side is rotationally driven. Therefore, the heat generated in the phosphor layer 12 and transferred from the wheel substrate 11 to the heat dissipation member 13 is efficiently transferred to the fins 221a and 221b, which makes it possible to efficiently cool the phosphor layer 12.

Note that the upper limit of the aspect ratio is preferably, for example, 10 or less. This is because if the aspect ratio exceeds 10, the effect of improving the cooling performance is reduced. Further, this is because in the case where the aspect ratio is 10 or more, that is, the portion corresponding to the fin becomes large, the degree of difficulty in manufacturing the heat dissipation members 13A, 13B, and 13C and the case 20 becomes high.

Preferably, the housing 20 comprises a material having a high thermal conductivity. Specifically, the housing 20 desirably comprises, for example, pure aluminum, an aluminum alloy, a copper alloy (such as beryllium copper), or the like.

Note that, in fig. 1, as the case 20, a hermetic case is shown in which the front face portion 21, the rear face portion 22, and the side face portion 23 are joined to each other and completely isolated from the outside; however, the housing 20 may be an open type housing in which the front surface (surface 11S1) side of the wheel base 11 is open. Further, in the present embodiment, the side surface portion 23 serves as a surface opposing the fins 132C of the heat radiation member 13C provided on the peripheral edge portion of the wheel base 11; however, another fin may be separately provided on the back surface portion 22 as a surface opposite to the fin 132 c.

In the case where the housing 20 has a sealed structure, the housing 20 may be filled with a gas having a higher thermal conductivity than air in addition to air as a fluid. Specifically, the housing 20 is preferably filled with a gas having a thermal conductivity higher than that of air (thermal conductivity in an environment of 20 ℃ is 0.0257W/mK). Examples of such gases include helium (He). Not only gas but also liquid can be sealed in the housing 20. Examples of the liquid sealed in the housing 20 include water, silicone oil, and the like, and it is preferable to select a liquid having as low a viscosity as possible. Note that, in the case where the liquid is sealed in the housing 20, the phosphor wheel 10A may be rotated by magnetic driving.

Further, for example, the heat dissipation structure 30 may be provided outside the housing 20, as shown in fig. 1. This makes it possible to improve the heat dissipation efficiency in the housing 20. For example, the heat dissipation structure 30 includes a support member 31 joined to the back surface (surface S2) of the case 20 and a plurality of fins 32 mounted on the support member 31. The heat transferred from the phosphor wheel 10A to the housing 20 is diffused into the air.

The heat dissipation structure 30 may have the following configuration: in which a plurality of heat pipes are mounted on the back surface (surface S2) of the case 20, and a heat sink is coupled to ends of the heat pipes. Examples of other heat dissipation structures include liquid cooling systems. In the liquid cooling system, a pipe is installed on, for example, a surface or a side surface of the casing 20, and a cooling medium flows in the pipe, which causes heat of the casing 20 to be transferred to the cooling medium, thereby cooling the casing 20. The heat transferred to the cooling medium is radiated to the air through a radiator or the like.

(1-2. method for producing phosphor wheel)

The phosphor wheel 10A according to the present embodiment can be manufactured, for example, as follows. Fig. 4A and 4B are each a schematic view of a process of manufacturing the phosphor wheel 10A shown in fig. 1.

First, as shown in fig. 4A, the heat radiation members 13A, 13B, and 13C are joined to the back surface (surface 11S2) of the wheel base 11. After that, as shown in fig. 4B, the phosphor layer 12 is bonded to the front surface of the wheel base 11 (surface 11S 1).

Fig. 5 shows the warpage of the wheel base plate 11. Here, an aluminum substrate having a diameter of 95mm and a thickness of 0.8mm was used as the wheel substrate 11 and a sintered phosphor was used as the phosphor layer 12. In the case where the phosphor layer 12 was fixed to the aluminum wheel substrate 11 using a thermosetting adhesive, the warpage of the wheel substrate 11 after thermosetting was 0.4. In contrast, as in the present embodiment, in the case where the plurality of concentric heat dissipation members 13 are fixed to the back surface (surface 11S2) of the wheel base 11 and then the phosphor layer 12 is fixed to the front surface (surface 11S1) of the wheel base 11, the warpage of the heat-cured wheel base 11 is about 0.07. As described above, the phosphor layer 12 is bonded after the heat dissipation member 13 is bonded to the back surface of the wheel substrate 11, so that the warpage can be reduced to about 1/6 of the warpage of the wheel substrate 11.

(1-3. configuration of light Source device)

Fig. 6 is a schematic diagram of the overall configuration of the light source device 1. Note that in fig. 6, the phosphor wheel 10A is shown together with the housing 20 in a simplified manner. The light source device 1 includes: a phosphor wheel 10A as a wavelength converter; a light source unit 1110; a polarization beam splitter PBS 1112; a quarter wave plate 1113; and a condensing optical system 1114(1114A and 1114B). The members included in the light source apparatus 1 are disposed on the optical path of the white light (multiplexed light Lw) output from the phosphor wheel 10A in the order of the light condensing optical system 1114, the quarter wave plate 1113, the PBS 1112, and the light source unit 1100 from the side of the phosphor wheel 10A.

The light source unit 1110 includes a solid-state light emitting device that outputs light having a predetermined wavelength. In the present embodiment, as the solid-state light-emitting device, a semiconductor laser device that oscillates excitation light EL (e.g., blue laser light having a wavelength of 445nm or 455nm) is used, and excitation light EL of linearly polarized light (e.g., S-polarized light) is output from the light source unit 1110.

It is to be noted that in the case where the light source unit 1110 includes a semiconductor laser device, the excitation light EL of a predetermined output may be obtained by one semiconductor laser device, or the excitation light EL of a predetermined output may be obtained by multiplexing light output from a plurality of semiconductor laser devices. Further, the wavelength of the excitation light EL is not limited to the above-described numerical value, but any wavelength may be used as long as the wavelength is within the wavelength band of light called blue light.

The PBS 1112 separates the excitation light EL entering from the light source unit 1110 and the multiplexed light Lw entering from the phosphor wheel 10A. Specifically, the PBS 1112 transmits the excitation light EL incident from the light source unit 1110 toward the quarter wave plate 1113. Further, the PBS 1112 reflects the multiplexed light Lw incident from the phosphor wheel 10A and transmitted through the condensing optical system 1114 and the quarter wave plate 1113. The reflected multiplexed light Lw enters an illumination optical system 2 (described later).

The quarter wave plate 1113 is a phase difference device that generates a pi/2 phase difference with respect to incident light. Under the condition that the incident light is linearly polarized light, the quarter wave plate 1113 converts the linearly polarized light into circularly polarized light; in the case where the incident light is circularly polarized light, the quarter wave plate 1113 converts the circularly polarized light into linearly polarized light. In the present embodiment, the excitation light EL that is linearly polarized light output from the PBS 1112 is converted into excitation light EL that is circularly polarized light by the quarter wave plate 1113. Further, the excitation light component of the polarized light contained in the multiplexed light Lw output from the phosphor wheel 10A is converted into linearly polarized light by the quarter wave plate 1113.

The condensing optical system 1114(1114A and 1114B) condenses the excitation light EL output from the quarter-wave plate 1113 to have a predetermined spot diameter, and outputs the condensed excitation light EL toward the phosphor wheel 10A. The condensing optical system 1114 converts the multiplexed light Lw output from the phosphor wheel 10A into parallel light, and outputs the parallel light to the quarter wave plate 1113. It should be noted that the condensing optical system 1114 may include a single collimating lens, for example, and may be configured to convert incident light into parallel light using a plurality of lenses.

The configuration of the optical member that separates the excitation light EL entering from the light source unit 1110 from the multiplexed light Lw output from the phosphor wheel 10A is not limited to the PBS 1112, and any optical member may be used as long as the optical member has a configuration capable of the above-described light separation operation.

(1-4. work and Effect)

The light source apparatus 1 according to the present embodiment includes a phosphor wheel 10A in which three heat dissipation members 13A, 13B, and 13C, the heat dissipation properties of which are different from each other according to the distance from the phosphor layer 12, are concentrically arranged on the back surface (surface 11S2) of the wheel base plate 11 on which the phosphor layer 12 is provided. The heat dissipation performance of each of the heat dissipation members 13A, 13B, and 13C is as follows: heat dissipation member 13A > heat dissipation member 13B > heat dissipation member 13C. The heat dissipation member 13A having the highest heat dissipation performance is disposed closest to the phosphor layer 12 (for example, immediately below the phosphor layer 12), the heat dissipation member 13B is disposed next, and the heat dissipation member 13C having the lowest heat dissipation performance is disposed at the farthest position from the phosphor layer 12 (for example, on the peripheral edge portion of the wheel base 11). This makes it possible to effectively diffuse heat generation of the phosphor layer 12 caused by application of the excitation light EL while suppressing an increase in weight of the phosphor wheel 10A. This will be described below.

In recent years, a laser light source having a small size, a long life, and a fast rise and fall has been widely used as a white light source. Although a semiconductor laser is mainly used as the laser, the semiconductor laser has low light emission efficiency in a GB light source among RGB light sources required for a white light source. For this reason, widely used is a light source device (phosphor laser light source) of a laser-phosphor system that generates white light by synthesizing a blue laser light and yellow fluorescence extracted by exciting a phosphor with the blue laser light.

However, there is a temperature quenching problem in which the luminous efficiency of the phosphor decreases as the temperature increases. Therefore, a method of suppressing the temperature rise of the phosphor by using a rotating phosphor wheel and diffusing the heat generated by laser excitation is adopted. Such a light source apparatus may reduce luminous efficiency or may be damaged due to dust attached to the phosphor wheel. Therefore, in an actual product, the phosphor wheel is disposed in a closed space. As described above, as a heat dissipation technique of the phosphor wheel provided in the sealed space, there is a method of: concentric fins nested with each other are provided on a back surface of the wheel base and a surface of the sealing case opposite to the back surface of the wheel base, and a cooling efficiency of the light emitting unit of the phosphor is improved by using taylor vortices generated between the fins when the wheel base is rotationally driven.

However, in the light source apparatus having the above heat dissipation structure, the balance between the heat dissipation efficiency and the weight of the phosphor wheel is considered to be a problem. The heat dissipation efficiency of the above light source device can be improved by increasing the number of fins and increasing the length of the fins, but in this case, the weight is increased, thereby causing problems of increased size and increased cost of the driving motor.

In contrast, the light source apparatus 1 according to the present embodiment includes, for example, three heat dissipation members 13A, 13B, and 13C, the heat dissipation performance of the three heat dissipation members 13A, 13B, and 13C differs depending on the distance from the phosphor layer 12, and is provided on the back surface (surface 11S2) of the wheel substrate 11 on which the phosphor layer 12 is provided. Specifically, as the distance from the phosphor layer 12 decreases, a heat dissipation member (heat dissipation member 13A) having higher heat dissipation performance is provided, and as the distance from the phosphor layer 12 increases, a heat dissipation member (heat dissipation member 13C) having lower heat dissipation performance is provided. This makes it possible to effectively reduce the temperature of the phosphor layer 12 that rises due to the application of the excitation light EL while suppressing an increase in weight of the phosphor wheel 10A.

As described above, in the present embodiment, on the back surface (surface 11S2) of the wheel substrate 11 on which the phosphor layer 12 is provided, the heat dissipation member (heat dissipation member 13A) having higher heat dissipation performance is provided as the distance from the phosphor layer 12 decreases, and the heat dissipation member (heat dissipation member 13C) having lower heat dissipation performance is provided as the distance from the phosphor layer 12 increases. This makes it possible to efficiently cool the phosphor layer 12 that generates heat due to the application of the excitation light EL while suppressing an increase in weight of the phosphor wheel 10A. That is, the heat dissipation efficiency can be improved.

Further, in the present embodiment, three heat radiation members 13A, 13B, and 13C are provided on the back surface (surface 11S2) of the wheel base 11, for example, concentrically. Therefore, when the phosphor layer 12 is fixed to the front surface (surface 11S1), the warpage of the wheel substrate 11 can be reduced. This suppresses deflection of the phosphor surface and allows stable power to be output as a light source. Namely, the flicker can be suppressed. Noise can also be suppressed.

Next, a description is given of second and third embodiments and modified examples 1 to 8 and application examples of the present disclosure. Hereinafter, components similar to those of the foregoing first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted where appropriate.

<2 > second embodiment

Fig. 7 schematically shows a sectional configuration of the wavelength converter (phosphor wheel 10B) and the housing 20 in the light source apparatus (light source apparatus 1) according to the second embodiment of the present disclosure. The phosphor wheel 10B is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later, as with the phosphor wheel 10A according to the foregoing first embodiment. The phosphor wheel 10B according to the present embodiment is different from the foregoing first embodiment in that: three heat dissipation members 43A, 43B, and 43C having fins 432a, 432B, and 432C, respectively, of different thicknesses are employed as the heat dissipation members 43 different in heat dissipation performance.

As with the phosphor wheel 10A, in the phosphor wheel 10B, three concentric heat dissipation members 43A, 43B, and 43C are provided as a plurality of heat dissipation members 43 on the back surface (surface 11S2) side of the wheel base 11. As with the heat dissipation members 13A, 13B, and 13C, the heat dissipation members 43A, 43B, and 43C include fixing portions 431(431a, 431B, and 431C) joined to the back surface (surface 11S2) of the wheel base 11 and fins 432(432a, 432B, and 432C) bent substantially parallel to the rotation axis J14 of the phosphor wheel 10B.

Of the heat dissipation members 43A, 43B, and 43C, the heat dissipation property of the heat dissipation member 43A is the highest, the heat dissipation property of the heat dissipation member 43B is the next lowest, and the heat dissipation property of the heat dissipation member 43C is the lowest. In the present embodiment, as in the foregoing first embodiment, the heat radiation member 43A having the highest heat radiation performance is provided at a position closest to the phosphor layer 12 as a heat source, for example, immediately below the phosphor layer 12, and the heat radiation member 43C having the lowest heat radiation performance is provided at a position farthest from the phosphor layer 12, for example, on the peripheral edge portion of the wheel base 11. That is, the heat radiation members 43A, 43B, and 43C are provided in order from the rotation center (O) of the wheel base plate 11.

In the present embodiment, as described above, the heat dissipation performance of each of the heat dissipation members 43A, 43B, and 43C is adjusted by the respective thicknesses of the fins 432a, 432B, and 432C. Specifically, the heat dissipation members 43A, 43B, and 43C respectively have the fin 432a having the thickness t1, the fin 432B having the thickness t2, and the fin 432C having the thickness t3, and satisfy the thickness relationship of t1 > t2 > t 3. Therefore, the thickness of the fins 432a of the heat dissipation member 43A disposed closest to the phosphor layer 12 is the thickest, and the thickness of the fins 432b and 432c becomes thinner as the distance from the phosphor layer 12 increases. This makes it possible to reduce the weight of the phosphor wheel 10A while maintaining the cooling efficiency of the heating body (phosphor layer 12) by the heat radiation members 43A, 43B, 43C.

As described above, in the present embodiment, the three heat dissipation members 43A, 43B, and 43C having the fins 432a, 432B, and 432C of different thicknesses are disposed such that the heat dissipation member 43A having the highest heat dissipation performance is disposed at the position closest to the phosphor layer 12 (for example, immediately below the phosphor layer 12), and the heat dissipation member 43C having the lowest heat dissipation performance is disposed at the position farthest from the phosphor layer 12 (for example, on the peripheral edge portion of the wheel base 11). This makes it possible to obtain effects similar to those of the foregoing first embodiment.

<3 > third embodiment

Fig. 8 schematically shows a sectional configuration of the wavelength converter (phosphor wheel 10C) and the housing 20 in the light source apparatus (light source apparatus 1) according to the third embodiment of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10C is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10C according to the present embodiment is different from the foregoing first embodiment in that: three heat dissipation members 53A, 53B, and 53C having fins 532a, 532B, and 532C of different lengths and thicknesses, respectively, are employed as the heat dissipation members 53 having different heat dissipation properties.

As with the phosphor wheel 10A, in the phosphor wheel 10C, three concentric heat dissipation members 53A, 53B, and 53C are provided as the plurality of heat dissipation members 53 on the back surface (surface 11S2) side of the wheel base 11. The heat discharging members 53A, 53B, and 53C include fixing portions 531(531a, 531B, and 531C) joined to the back surface (surface 11S2) of the wheel base 11 and fins 532(532a, 532B, and 532C) bent substantially parallel to the rotation axis J14 of the phosphor wheel 10C.

Of the heat dissipation members 53A, 53B, and 53C, the heat dissipation property of the heat dissipation member 53A is the highest, the heat dissipation property of the heat dissipation member 53B is the next highest, and the heat dissipation property of the heat dissipation member 53C is the lowest. In the present embodiment, as in the foregoing first embodiment, the heat dissipation member 53A having the highest heat dissipation performance is provided at a position closest to the phosphor layer 12 as a heat source, for example, immediately below the phosphor layer 12, and the heat dissipation member 53C having the lowest heat dissipation performance is provided at a position farthest from the phosphor layer 12, for example, on the peripheral edge portion of the wheel base 11. That is, the heat radiation members 53A, 53B, and 53C are provided in order from the rotation center (O) of the wheel base plate 11.

In the present embodiment, as described above, the heat dissipation performance of each of the heat dissipation members 53A, 53B, and 53C is adjusted by the respective lengths and the respective thicknesses of the fins 532a, 532B, and 532C. Specifically, heat radiation members 53A, 53B, and 53C respectively have fin 532a having length l1 and thickness t1, fin 532B having length l2 and thickness t2, and fin 532C having length l3 and thickness t3, and satisfy the length relationship l1 > l2 > l3 and the thickness relationship t1 > t2 > t 3. Therefore, the fin 532a of the heat dissipation member 53A disposed closest to the phosphor layer 12 has the longest length and the thickest thickness, and as the distance from the phosphor layer 12 increases, the fins 532b and 532c become shorter in length and thinner in thickness. This makes it possible to reduce the weight of the phosphor wheel 10A while maintaining the cooling efficiency of the heat generating body (phosphor layer 12) by the heat dissipation members 53A, 53B, and 53C.

As described above, in the present embodiment, the three heat dissipation members 53A, 53B, and 53C having the fins 532a, 532B, and 532C of different lengths and thicknesses are disposed such that the heat dissipation member 53A having the highest heat dissipation performance is disposed at the position closest to the phosphor layer 12 (for example, immediately below the phosphor layer 12), and the heat dissipation member 53C having the lowest heat dissipation performance is disposed at the position farthest from the phosphor layer 12 (for example, on the peripheral edge portion of the wheel base 11). This makes it possible to improve the heat radiation efficiency as compared with the effects similar to the foregoing first embodiment.

For example, in the case where a phosphor wheel having four concentric circular fins with a uniform sectional shape is provided on a wheel base plate 11 with a diameter of 95mm and a thickness of 0.8mm and a phosphor wheel having four fins with different lengths and different thicknesses is provided on a wheel base plate 11 as in the present embodiment, and in the case where the wheel weights are the same, the latter phosphor wheel is expected to have a peak temperature reduction effect of about 5%. Further, for example, if the phosphor wheels have the same cooling efficiency, the weight of the latter phosphor wheel can be reduced, and the life of the motor 14 of the latter phosphor wheel can be extended.

<4. modified example >

(4-1. modified example 1)

Fig. 9 schematically shows a sectional configuration of the wavelength converter (phosphor wheel 10D) and the housing 20 in the light source apparatus (light source apparatus 1) according to modification 1 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10D is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10D according to this modification differs from the third embodiment and the like in that: a plurality of fins 632 provided on the back surface (surface 11S2) of the wheel base 11 are integrally formed.

As with the phosphor wheel 10C according to the foregoing third embodiment, in the phosphor wheel 10D, three concentric fins 632a, 632b, and 632C having different lengths and different thicknesses are integrally formed as a plurality of heat dissipation members 63 on the back surface (surface 11S2) side of the wheel base 11. In the present modification, the fins 632a, 632b, and 632c are formed on the common fixing portion (fixing portion 631) that engages with the back surface (surface 11S2) of the wheel base plate 11.

Such a plurality of heat dissipation members 63 formed in an integrated manner may be manufactured by, for example, cutting, casting, 3D printing, or the like.

As described above, in the present modification, the fins 632a, 632b, and 632c included in the plurality of heat radiation members 63 are integrally formed on the common fixing portion (fixing portion 631). This increases the contact area between the wheel base 11 and the heat radiation member 63, thereby reducing the contact resistance. Therefore, the heat radiation efficiency can be further improved as compared with the aforementioned third embodiment.

(4-2. modification 2)

Fig. 10 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10E) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 2 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10E is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10E according to this modification differs from the third embodiment described above in that: among the plurality of heat radiation members 73 provided on the back surface (surface 71S2) of the wheel base 71, the heat radiation member 73C provided on the peripheral edge portion of the wheel base 71 is integrally formed with the wheel base 71.

As with the phosphor wheel 10C according to the foregoing third embodiment, the phosphor wheel 10E is provided with three concentric heat dissipation members 53A, 53B, and 73C having different lengths and different thicknesses as the plurality of heat dissipation members 73 on the back surface (surface 71S2) side of the wheel base 11. In the present modification, in the three heat dissipation members 53A, 53B, 73C, the fins 732C of the heat dissipation member 73C provided on the outermost periphery are formed integrally with the wheel base 71 by bending the peripheral edge portion of the wheel base 71 toward the back surface (surface 71S 2).

As described above, in the present modification, among the plurality of heat radiation members 73, the heat radiation member 73C provided on the outermost periphery is formed integrally with the wheel base 71. This eliminates the contact resistance between the outermost heat dissipation member 73C and the wheel base 71. Therefore, the heat radiation efficiency can be further improved as compared with the aforementioned third embodiment.

(4-3. modification 3)

Fig. 11 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10F) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 3 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10F is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10F according to this modification differs from the third embodiment described above in that: a plurality of heat radiation members 83 provided on the back surface (surface 81S2) of the wheel base 81 are formed integrally with the wheel base 81.

As with the phosphor wheel 10C of the foregoing third embodiment, the phosphor wheel 10F is provided with three concentric heat dissipation members 83A, 83B, and 83C having different lengths and different thicknesses as the plurality of heat dissipation members 83 on the back surface (surface 81S2) side of the wheel base 11. In the present modification, three heat radiation members 83A, 83B, and 83C are formed integrally with the wheel base 81.

Such a plurality of heat dissipation members 83 formed in an integrated manner may be manufactured by, for example, cutting, casting, 3D printing, or the like.

As described above, in the present modification, the plurality of heat radiation members 83 provided on the back surface (surface 81S2) of the wheel base 81 are formed integrally with the wheel base 81. This eliminates the contact resistance between the outermost heat radiation member 83C and the wheel base 81. Therefore, the heat radiation efficiency can be further improved as compared with modification 2.

In the present modification, as shown in fig. 3, the phosphor layer 12 is preferably fixed to the wheel base 81 via the reflection film 15. As a result, the surface roughness and reflectance required for the surface of the wheel base 81 in contact with the phosphor layer 12, which is integrally formed with the plurality of heat dissipation members 83 manufactured by cutting or 3D printing, are reduced. Therefore, the cost can be reduced.

(4-4. modification 4)

Fig. 12 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10C) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 4 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10C is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10C according to the present modification is a modification of the foregoing third embodiment, in which a heat dissipation member (for example, a heat dissipation member 53D) is further provided on the inner periphery of the phosphor layer 12 as a plurality of heat dissipation members 53 provided on the back surface (surface 11S2) of the wheel substrate 11. In addition, the case 20 is further provided with fins 221D engaged with the heat dissipation member 53D.

As described above, the heat dissipation member 53D is further provided on the inner periphery of the phosphor layer 12. This makes it possible to further improve the heat dissipation efficiency without increasing the outer size of the phosphor wheel 10C.

(4-5. modification 5)

Fig. 13 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10C) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 5 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10C is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, the light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10C according to the present modification is a modification of the foregoing third embodiment, in which the inclined surface 20X is formed on the peripheral edge portion of the back surface side of the housing 20 in accordance with the shape change of the plurality of heat radiation members 53A, 53B, and 53C provided on the wheel base plate 11.

As described above, the inclined surface 20X is provided on the peripheral edge portion of the back surface side of the housing 20 in accordance with the shape change of the heat dissipation members 53A, 53B, and 53C, for example, the lengths of the fins 532a, 532B, and 532C. This shortens the path of heat that has been transferred from the heat dissipation members 53A and 53B to the fins 221a and 221B to be discharged to the outside air, and makes it possible to reduce the thermal resistance. Therefore, the heat radiation efficiency can be further improved as compared with the aforementioned third embodiment. Further, the housing 20 accommodating the phosphor wheel 10C can also be miniaturized.

It should be noted that although fig. 13 shows an example in which the inclined surface 20X is provided on the peripheral edge portion of the back surface side of the housing 20, the shape of the housing 20 is not limited thereto. For example, as shown in fig. 14, steps 20Y1 and 20Y2 may be provided on the peripheral edge portion of the back surface side of the case 20 in accordance with the shape change of the heat dissipation members 53A, 53B, and 53C.

(4-6. modification 6)

Fig. 15 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10G) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 6 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10G is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, light source apparatus 1) of a projection display apparatus (projector 1000) described later. In the phosphor wheel 10G according to the present modification, a plurality of heat radiation members 56 are further provided on the outer periphery of the phosphor layer 12 on the front surface (surface 11S1) of the wheel base 11.

In the phosphor wheel 10G, in addition to the back surface (surface 11S2) side of the wheel base plate 11, the front surface (surface 11S1) side is also provided with a plurality of concentric heat dissipation members 56, each of the heat dissipation members 56 having a heat dissipation function different from each other and centered on the rotation center (O) of the wheel base plate 11. In the present modification, as with the phosphor wheel 10C according to the foregoing third embodiment, for example, two concentric heat dissipation members 56A and 56B having different lengths and different thicknesses are provided as the plurality of heat dissipation members 56. With respect to the two heat dissipation members 56A and 56B, the heat dissipation property of the heat dissipation member 56A is higher than that of the heat dissipation member 56B, and the distance of the heat dissipation member 56A from the phosphor layer 12 is smaller than that of the heat dissipation member 56B from the phosphor layer 12. The heat radiation performance of the heat radiation member 56B is lower than that of the heat radiation member 56A, and is provided, for example, on the peripheral edge portion of the wheel base 11. The two heat dissipation members 56A and 56B each correspond to a specific example of "third heat dissipation member" of the present disclosure.

Further, in the present modification, for example, two concentric fins 211(211a, 211B) centered on the rotation center (O) of the wheel base plate 11 are provided on the front surface portion 21 of the housing 20, for example, and are provided in a nested manner with the heat radiation members 56A and 56B provided on the front surface (surface 11S1) of the wheel base plate 11. That is, the front surface portion 21 of the housing 20 corresponds to a specific example of the "second support member" of the present disclosure, and the two fins 211(211a and 211b) respectively correspond to a specific example of the "fourth heat dissipation member" of the present disclosure.

As described above, in the present modification, the two concentric heat radiation members 56A and 56B different in heat radiation performance are provided on the front surface (surface 11S1) of the wheel base plate 11, and further, the two fins 211a and 211B are provided on the front surface portion 21 of the housing 20 in a manner nested with the two concentric heat radiation members 56A and 56B. As a result, when the phosphor wheel 10G is rotationally driven, taylor vortices are generated in the fluid between the heat dissipation member 56A and the fins 211a and between the heat dissipation member 56B and the fins 211B, thereby making it possible to efficiently transfer the heat generated by the phosphor layer 12 to the case 20 also from the front surface (surface 11S1) side of the wheel substrate 11. Therefore, the heat radiation efficiency can be further improved as compared with the aforementioned third embodiment.

It should be noted that although fig. 15 shows an example in which the motor 14 is provided on the back surface (surface 11S2) side of the wheel base 11, for example, the motor 14 may be provided on the front surface (surface 11S1) side of the wheel base 11 as shown in fig. 16. This makes it possible to shorten the length of the fins 221a and 221B formed on the back face portion 22, and to shorten the path through which the heat that has been transferred from the heat dissipation members 53A and 53B to the fins 221a and 221B is discharged to the outside air. Therefore, the thermal resistance can be reduced and the heat dissipation efficiency can be further improved as compared with the modification 5 described above. This similarly applies to the first to third embodiments, modifications 1 to 5, and modification 7 to be described next.

(4-7. modified example 7)

Fig. 17 schematically shows a sectional configuration of a wavelength converter (phosphor wheel 10H) and a housing 20 in a light source apparatus (light source apparatus 1) according to modification 7 of the present disclosure. As with the phosphor wheel 10A according to the foregoing first embodiment, the phosphor wheel 10H is used, for example, as a light emitting device (wavelength converter) in a light source apparatus (for example, light source apparatus 1) of a projection display apparatus (projector 1000) described later. The phosphor wheel 10H according to the present modification is a so-called transmissive wavelength converter in which the fluorescent light FL converted in the phosphor layer 12 is emitted from the side opposite to the incident direction of the excitation light EL.

As with the phosphor wheel 10C of the foregoing third embodiment, the phosphor wheel 10H is provided with four concentric heat dissipation members 93A, 93B, 93C, and 93D having different lengths and different thicknesses as the plurality of heat dissipation members 93 on the back surface (surface 91S2) side of the wheel base 11.

Four heat dissipation members 93A, 93B, 93C, and 93D are provided in such a manner that: as in modification 4, heat dissipation members 93A, 93B, and 93C are provided on the outer periphery of the phosphor layer 12, and a heat dissipation member 93D is provided on the inner periphery of the phosphor layer 12. Of the four heat dissipation members 93A, 93B, 93C, and 93D, the heat dissipation members 93A and 93D have higher heat dissipation performance than the other two heat dissipation members 93B and 93C, respectively, and the heat dissipation performance of the heat dissipation members 93A and 93D is the same. The two heat dissipation members 93A and 93D are provided, for example, in such a manner that the fixing portions 931a and 931b extend in opposite directions so as not to hinder the application of the excitation light EL entering from the back surface (surface S2) side of the housing 20 to the phosphor layer 12.

In addition, a lens 25 is provided at a position where the excitation light EL enters (at a position facing the phosphor layer 12) in the back surface portion 22 of the housing 20. The lens 25 may be, for example, a concave lens that controls the degree of applying the excitation light EL to the phosphor layer 12.

As described above, the present technology can be applied to the transmission type wavelength converter (phosphor wheel 10H). In addition to the effects similar to the foregoing third embodiment, it is possible to suppress an increase in weight of the phosphor wheel 10H and to efficiently cool the phosphor layer 12 heated by applying the excitation light EL, thereby making it possible to improve the heat radiation efficiency.

It should be noted that although fig. 17 shows an example in which the excitation light EL enters through the side of the back surface (surface S2) of the housing 20 and the fluorescent light FL is output through the side of the front surface (surface S1) of the housing 20, this example is not limited thereto, but the excitation light EL may enter through the side of the front surface (surface S1) of the housing 20 and the fluorescent light FL may be output through the side of the back surface (surface S2) of the housing 20.

(4-8. modified example 8)

Fig. 18 is a schematic diagram of another configuration example of the light source device 1 shown in the foregoing first embodiment. The light source device 1 may have the following configuration, for example.

The light source apparatus 1 includes a phosphor wheel 10A, a diffuser 1127, a light source unit 1110 that emits excitation light or laser light, lenses 1121 to 1124, a dichroic mirror 1125, and a reflecting mirror 1126. The diffuser 1127 is coupled to the motor 1128 and is rotatable about an axis J1127. The light source unit 1110 includes a first laser group 1110A and a second laser group 1110B. The first laser group 1110A includes a plurality of semiconductor laser devices 1111A that oscillate excitation light (for example, having a wavelength of 445nm or 455nm), and the second laser group 1110B includes a plurality of semiconductor laser devices 1111B that oscillate blue laser light (for example, having a wavelength of 465 nm). For convenience, the excitation light oscillated by the first laser group 1110A is denoted by EL1, and the blue laser light oscillated by the second laser group 1110B (hereinafter, simply referred to as blue light) is denoted by EL 2.

In the light source apparatus 1, the phosphor wheel 10A is disposed so that the excitation light ELl from the first laser group 1110A that has passed through the lens 1121, dichroic mirror 1125, and lens 1122 enters the phosphor layer 12. The fluorescent light FL output from the fluorescent substance wheel 10A is reflected by the dichroic mirror 1125, then passes through the lens 1123, and is emitted toward the outside, for example, toward the illumination optical system 2 described later. A diffuser 1127 diffuses the blue light (laser light EL2) from the second laser group 1110B that passes through the mirror 1126. The blue light (laser light EL2) diffused by the diffuser 1127 passes through the lens 1124 and the dichroic mirror 1125, and then passes through the lens 1123 and exits toward the outside, that is, toward the illumination optical system 2.

Note that it is desirable to provide a cooling fan in the light source device 1 to cool the heat generated in the phosphor layer 12 in association with the application of the excitation light ELl and the laser light EL 2. Further, the layout of the respective members included in the light source apparatus 1 is not limited to the configuration shown in fig. 18.

<5. application example >

Next, a projection display apparatus (projectors 1000 and 2000) including the light source apparatus 1 having the phosphor wheel 10A (or any one of the phosphor wheels 10B, 10C, 10D, 10E, 10F, 10G, and 10H) will be described with reference to fig. 19 and 20. Fig. 19 illustrates a reflective 3LCD projector (projector 1000) that performs light modulation by a reflective liquid crystal panel (LCD). Fig. 20 illustrates a reflective 3LCD projector (projector 2000) that performs light modulation by a transmissive liquid crystal panel (LCD). It should be noted that the projection display apparatus according to the present disclosure may also be applied to, for example, a projector using a Digital Micromirror Device (DMD) or the like instead of the reflective liquid crystal panel and the transmissive liquid crystal panel.

(application example 1)

Fig. 19 shows a configuration example of a reflective 3LCD projector 1000 that performs light modulation by a reflective liquid crystal panel (LCD). The projector 1000 includes, for example, the light source device 1, the illumination optical system 2, the image forming unit 3, and the projection optical system 4 described in the foregoing first embodiment in this order. It should be noted that the illumination optical system 2 and the image forming unit 3 correspond to a specific example of the image generation optical system of the present disclosure.

For example, illumination optical system 2 includes, from a position close to light source apparatus 1, fly-eye lenses 1210(1210A and 1210B), polarization conversion device 1220, lens 1230, dichroic mirrors 1240A and 1240B, reflection mirrors 1250A and 1250B, lenses 1260A and 1260B, dichroic mirror 1270, and polarizing plates 1280A to 1280C.

Fly-eye lenses 1210(1210A and 1210B) make the illuminance distribution of white light from lens 65 of light source device 1 uniform. The polarization conversion device 1220 serves to orient the polarization axis of incident light to a predetermined direction. For example, the polarization conversion device 1220 converts light other than P-polarized light into P-polarized light. Lens 1230 condenses light from polarization conversion device 1220 toward dichroic mirrors 1240A and 1240B. The dichroic mirrors 1240A and 1240B selectively reflect light within a predetermined wavelength range and selectively allow light in a wavelength range outside the predetermined wavelength range to pass therethrough. For example, dichroic mirror 1240A primarily reflects red light into the direction of mirror 1250A. Further, dichroic mirror 1240B reflects the blue light primarily in the direction of mirror 1250B. Accordingly, the green light is guided to a reflective polarizing plate 1310C (described later) of the imaging unit 3 through dichroic mirrors 1240A and 1240B. Mirror 1250A reflects light (mainly red light) from dichroic mirror 1240A toward lens 1260A, and mirror 1250B reflects light (mainly blue light) from dichroic mirror 1240B toward lens 1260B. The lens 1260A allows light (primarily red light) from the mirror 1250A to pass through and focus the light to the dichroic mirror 1270. Lens 1260B allows light (primarily blue light) from mirror 1250B to pass through and focus the light to dichroic mirror 1270. The dichroic mirror 1270 selectively reflects green light and selectively allows light of wavelength ranges other than green light to pass therethrough. Here, the dichroic mirror 1270 allows the red component of the light from the lens 1260A to pass through. In the case where a green light component is included in the light from the lens 1260A, the dichroic mirror 1270 reflects the green light component toward the polarizing plate 1280C. The polarizing plates 1280A to 1280C include polarizers having predetermined polarizing axes. For example, in the case where conversion into P-polarized light is performed in the polarization conversion device 1220, the polarizing plates 1280A to 1280C allow the P-polarized light to pass therethrough, and reflect the S-polarized light.

The image forming unit 3 includes reflective polarizing plates 1310A to 1310C, reflective liquid crystal panels 1320A to 1320C, and a dichroic prism 1330.

The reflective polarizing plates 1310A to 1310C allow light having the same polarization axis as that of the polarized light from the polarizing plates 1280A to 1280C (for example, P-polarized light) to pass therethrough, and reflect light having any other polarization axis (S-polarized light), respectively. Specifically, the reflective polarizing plate 1310A allows P-polarized red light from the polarizing plate 1280A to be transmitted toward the direction of the reflective liquid crystal panel 1320A. The reflective polarizing plate 1310B allows P-polarized blue light from the polarizing plate 1280B to be transmitted toward the reflective liquid crystal panel 1320C. The reflective polarizing plate 1310C allows P-polarized green light from the polarizing plate 1280C to be transmitted toward the reflective liquid crystal panel 1320C. Further, the P-polarized green light that has entered reflection polarizing plate 1310C through dichroic mirrors 1240A and 1240B enters dichroic prism 1330 through reflection polarizing plate 1310C as it is. Further, the reflective polarizing plate 1310A reflects the S-polarized red light from the reflective liquid crystal panel 1320A, causing the S-polarized red light to enter the dichroic prism 1330. The reflective polarizing plate 1310B reflects the S-polarized blue light from the reflective liquid crystal panel 1320C, causing the S-polarized blue light to enter the dichroic prism 1330. The reflective polarizing plate 1310C reflects the S-polarized green light from the reflective liquid crystal panel 1320C, causing the S-polarized green light to enter the dichroic prism 1330.

The reflective liquid crystal panels 1320A to 1320C perform spatial modulation of red light, blue light, and green light, respectively.

The dichroic prism 1330 synthesizes the incident red light, the incident blue light, and the incident green light, and outputs the synthesized light toward the projection optical system 4.

The projection optical system 4 includes, for example, a plurality of lenses (lenses L1410 to L1450) and a mirror M1400. The projection optical system 4 enlarges the light output from the image forming unit 3 and projects the enlarged light onto the screen 1500 or the like.

(operation of light Source device and projector)

Next, the operation of the projector 1000 including the light source device 1 is given with reference to fig. 6 and 19.

First, the excitation light EL oscillates from the light source unit 1110 toward the PBS 1112. The excitation light EL is reflected by the PBS 1112, and then transmitted through the quarter wave plate 1113 and the condensing optical system 1114 in order to be applied to the phosphor wheel 10A.

In the phosphor wheel 10A (e.g., the phosphor wheel 10AA), some of the excitation light EL (e.g., blue light) is absorbed in the phosphor layer 12 and converted into light of a predetermined wavelength band (fluorescent light FL; e.g., yellow light). The fluorescent light FL emitted in the phosphor layer 12 is diffused and reflected to the side of the condensing optical system 1114 together with some of the excitation light EL that is not absorbed by the phosphor layer 12. As a result, in the phosphor wheel 10A, the fluorescent light FL and some of the excitation light EL are multiplexed to generate white light, and the white light (multiplexed light Lw) is output toward the condensing optical system 1114.

Thereafter, the multiplexed light Lw is transmitted through the condensing optical system 1114 and the quarter wave plate 1113, reflected by the PBS 1112, and enters the illumination optical system 2.

The multiplexed light Lw (white light) from the light source apparatus 1 passes through the fly-eye lenses 1210(1210A and 1210B), the polarization conversion device 1220, and the lens 1230 in this order, and then reaches the dichroic mirrors 1240A and 1240B.

Mainly, the red light R is reflected by the dichroic mirror 1240A, and the red light R passes through the mirror 1250A, the lens 1260A, the dichroic mirror 1270, the polarizing plate 1280A, and the reflective polarizing plate 1310A in this order to reach the reflective liquid crystal panel 1320A. The red light R is spatially modulated in the reflective liquid crystal panel 1320A, and then reflected by the reflective polarizing plate 1310A to enter the dichroic prism 1330. Note that in the case where the light reflected to mirror 1250A by dichroic mirror 1240A includes a green light component, the green light component is reflected by dichroic mirror 1270 and passes through polarizing plate 1280C and reflective polarizing plate 1310C to reach reflective liquid crystal panel 1320C. In dichroic mirror 1240B, primarily blue light B is reflected and enters dichroic prism 1330 through a similar process. The green light G having passed through the dichroic mirrors 1240A and 1240B also enters the dichroic prism 1330.

The red light, the blue light, and the green light entering the dichroic prism 1330 are synthesized into image light, and the image light is output to the projection optical system 4. The projection optical system 4 enlarges the image light from the image forming unit 3, and projects the enlarged image light onto the screen 1500 or the like.

(application example 2)

Fig. 20 is a schematic diagram of a configuration example of a transmission type 3LCD projection display device (projector 2000) that performs light modulation by a transmission type liquid crystal panel (LCD). The projector 2000 includes, for example, a light source device 1, an illumination optical system 6, an imaging unit 7, and a projection optical system 8.

The illumination optical system 6 includes, for example, an integrator device 1610, a polarization conversion device 1620, and a condensing lens 1630. Integrator arrangement 1610 includes a first fly-eye lens 1610A and a second fly-eye lens 1610B. The first fly-eye lens 1610A includes a plurality of microlenses arranged two-dimensionally, and the second fly-eye lens 1610B includes a plurality of microlenses arranged in one-to-one correspondence with the microlenses of the first fly-eye lens 1610A.

Light (parallel light) incident from the light source apparatus 1 to the integrator device 1610 is divided into a plurality of light fluxes by the microlenses of the first fly-eye lens 1610A, and an image of each light flux is formed on a corresponding one of the microlenses of the second fly-eye lens 1610B. Each microlens of the second fly-eye lens 1610B serves as a secondary light source, and a plurality of parallel light beams having uniform brightness are applied as incident light to the polarization conversion device 1620.

The integrator device 1610 functions to arrange incident light applied from the light source apparatus 1 to the polarization conversion device 1620 as a whole with a uniform luminance distribution.

The polarization conversion device 1620 functions to align the polarization state of incident light incident thereon through the integrator device 1610 and the like. The polarization conversion device 1620 outputs the output light including the blue light B, the green light G, and the red light R, for example, through a lens or the like provided on the output side of the light source apparatus 1.

The illumination optical system 6 further includes a dichroic mirror 1640A, a dichroic mirror 1640B, a reflection mirror 1650A, a reflection mirror 1650B, a reflection mirror 1650C, a relay lens 1660A, a relay lens 1660B, field lenses 1670A, 1670B, a field lens 1670C, liquid crystal panels 1710A, 1710B, and 1710C as the image forming unit 7, and a dichroic prism 1720.

The dichroic mirrors 1640A and 1640B have a characteristic of selectively reflecting color light in a predetermined wavelength range and allowing light in a wavelength range other than the predetermined wavelength range to pass through. For example, the dichroic mirror 1640A selectively reflects red light R. The dichroic mirror 1640B selectively reflects the green light G of the green light G and the blue light B passing through the dichroic mirror 1640A. The remaining blue light B passes through dichroic mirror 1640B. Accordingly, light (e.g., white multiplexed light Lw) emitted from the light source device 1 is separated into a plurality of color light beams having different colors.

The separated red light R is reflected by the mirror 1650A, passes through the field lens 1670A, becomes parallel light, and then enters the liquid crystal panel 1710A to be red-modulated. The green light G becomes parallel light after passing through the field lens 1670B, and then enters the liquid crystal panel 1710B to be modulated with green light. Blue light B passes through relay lens 1660A, is reflected by mirror 1650B, further passes through relay lens 1660B, and is reflected by mirror 1650C. The blue light B reflected by the mirror 1650C passes through the field lens 1670C and becomes parallel light, and then enters the liquid crystal panel 1710C to modulate the blue light B.

The liquid crystal panels 1710A, 1710B, and 1710C are electrically coupled to a signal source (e.g., a PC or the like), not shown, that supplies an image signal including image information. The liquid crystal panels 1710A, 1710B, and 1710C modulate incident light in each pixel based on the supplied image signals of the respective colors to generate a red image, a green image, and a blue image, respectively. The modulated light beams of the respective colors (formed images) enter the dichroic prism 1720 to be synthesized. The dichroic prism 1720 superimposes the light beams of the respective colors incident from three directions on each other to synthesize a light beam, and outputs the synthesized light beam to the projection optical system 8.

The projection optical system 8 includes, for example, a plurality of lenses. The projection optical system 8 enlarges the light output from the image forming unit 7 and projects the light onto the screen 1500.

Although the description has been given with reference to the first to third embodiments, the modification examples 1 to 8, and the application examples, the present disclosure is not limited to the foregoing embodiments and the like, and may be modified in various ways. For example, the materials and the like of the respective members described in the foregoing embodiments and the like are merely illustrative and not restrictive, and any other materials may be used.

Further, although modification examples 1 to 7 are described as examples in which each element is combined with the configuration of the third embodiment, the present disclosure is not limited thereto, and each element may be combined with the configuration of the first embodiment or the second embodiment. Further, modifications 1 to 7 may be combined with each other. For example, modification 5 describes an example using three heat dissipation members 53A, 53B, and 53C formed separately; however, for example, the three heat radiation members 53A, 53B, and 53C may be integrally formed with the fins 532a, 532B, and 532C of modification 1. Further, modification 7 describes a transmission type phosphor wheel 10H in which a plurality of heat dissipation members 93 are provided only on the back surface (surface 91S2) side of the wheel base 91; however, for example, a plurality of heat radiation members may be provided on the front surface (surface 91S1) side of the wheel base 91 as in modification 6.

Further, as the projection display device according to the present disclosure, a device other than the above-described projector may be configured. In addition, the light source apparatus according to the present disclosure may be used for apparatuses other than the projection display apparatus. For example, the light source device 1 according to the present disclosure may be used for illumination, and is suitable for a light source such as a headlight for an automobile or a light source for illumination.

It should be noted that the present technology may have the following configuration. According to the technique having the following configuration, it is possible to reduce the temperature of the phosphor layer by the thermal diffusion effect while suppressing the increase in weight. Therefore, heat dissipation efficiency can be improved. It should be noted that the effects described herein are not necessarily limiting, and any of the effects described in the present disclosure may be provided.

(1) A light source apparatus comprising:

a support substrate having a phosphor layer on one surface;

a driving unit that rotationally drives the support substrate;

a first support member disposed face to face with the other surface opposite to the one surface of the support substrate;

a plurality of first heat dissipation members having heat dissipation properties different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and

a plurality of second heat dissipation members concentrically disposed on a surface of the plurality of first support members facing the support substrate, the plurality of second heat dissipation members being alternately arranged with the plurality of first heat dissipation members.

(2)

The light source apparatus according to (1), wherein, of the plurality of first heat dissipation members, a heat dissipation property of a first heat dissipation member near the phosphor layer is higher than that of the other first heat dissipation members.

(3)

The light source apparatus according to (2), wherein a thickness of the first heat dissipation member in the vicinity of the phosphor layer is larger than a thickness of the other first heat dissipation member.

(4)

The light source apparatus according to (2) or (3), wherein thicknesses of the plurality of first heat dissipation members decrease with increasing distance from the phosphor layer.

(5)

The light source apparatus according to any one of (2) to (4), wherein a length of the first heat dissipation member in the vicinity of the phosphor layer is larger than lengths of the other first heat dissipation members.

(6)

The light source apparatus according to any one of (2) to (5), wherein heights of the plurality of first heat dissipation members decrease with increasing distance from the phosphor layer.

(7)

The light source apparatus according to any one of (1) to (6), wherein the support substrate and the plurality of first heat dissipation members are separately formed.

(8)

The light source apparatus according to any one of (1) to (6), wherein the plurality of first heat dissipation members are formed integrally with the support substrate.

(9)

The light source apparatus according to any one of (1) to (8), wherein the plurality of first heat dissipation members are arranged so as to avoid a formation region of the phosphor layer.

(10)

The light source device according to any one of (1) to (9), wherein

The phosphor layer has an annular shape, and

the light source device further includes:

one or more third heat discharging members disposed on the one surface of the support substrate concentrically with the phosphor layer,

a second support member disposed in face-to-face relation with the one surface of the support substrate, an

One or more fourth heat dissipation members facing the one or more third heat dissipation members, the one or more fourth heat dissipation members being disposed on a surface of the second support member facing the support substrate.

(11)

The light source apparatus according to (10), wherein, of the plurality of third heat dissipation members, a heat dissipation property of a third heat dissipation member near the phosphor layer is higher than that of the other third heat dissipation members.

(12)

The light source apparatus according to (11), wherein a thickness of the third heat dissipation member in the vicinity of the phosphor layer is larger than a thickness of the other third heat dissipation members.

(13)

The light source apparatus according to (11) or (12), wherein thicknesses of the plurality of third heat dissipation members decrease with increasing distance from the phosphor layer.

(14)

The light source apparatus according to any one of (11) to (13), wherein a length of the third heat dissipation member in the vicinity of the phosphor layer is larger than lengths of the other third heat dissipation members.

(15)

The light source apparatus according to any one of (11) to (14), wherein heights of the plurality of third heat dissipation members decrease with increasing distance from the phosphor layer.

(16)

The light source apparatus according to any one of (10) to (15), wherein the first support member and the second support member are included in a case that accommodates a support substrate having the phosphor layer, the plurality of first heat dissipation members, and the one or more third heat dissipation members.

(17)

The light source device according to (16), wherein the outer side of the housing further has a heat dissipation structure.

(18)

The light source apparatus according to (16) or (17), wherein the housing has a sealed structure.

(19)

The light source apparatus according to any one of (16) to (18), wherein the case is further sealed therein with helium gas.

(20) A projection display device comprising:

a light source device;

an image generation optical system that generates image light by modulating light from the light source device based on an input image signal; and

a projection optical system that projects the image light generated by the image generation optical system,

the light source apparatus includes:

a support substrate having a phosphor layer on one surface;

a driving unit that rotationally drives the support substrate;

a first support member disposed face to face with the other surface opposite to the one surface of the support substrate;

a plurality of first heat dissipation members having heat dissipation properties different from each other according to a distance from the phosphor layer, the plurality of first heat dissipation members being concentrically disposed on the other surface of the support substrate; and

a plurality of second heat dissipation members concentrically disposed on a surface of the plurality of first support members facing the support substrate, the plurality of second heat dissipation members being alternately arranged with the plurality of first heat dissipation members.

This application claims the benefit of japanese priority patent application JP2019-108135, filed on 10.6.2019 with the office, the entire contents of which are incorporated herein by reference.

It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors insofar as they fall within the scope of the appended claims or the equivalents thereof.