阅读说明：本技术 一种激光光源装置及激光投影系统 (Laser light source device and laser projection system ) 是由 张勇 高迪 于 2018-08-28 设计创作，主要内容包括：本发明公开了一种激光光源装置及激光投影系统,包括：激光阵列,位于激光阵列出光侧的荧光导光部件,以及位于荧光导光部件背离激光阵列一侧的匀光部件；其中,荧光导光部件采用的荧光晶体为单结晶荧光材料,作为一种荧光晶体纯净物,可以耐受更高的温度,可以接收激光阵列出射的较高能量的激光而不会发生荧光转换效率下降的问题。激光在入射到单结晶荧光材料时具有较高的透过率,在激光传输方向上激光几乎不会被散射,因此光损小,激光路径更加直接,可以有效提高荧光的激发效率。而在荧光晶体表面镀全波段反射膜,则可以实现激光所激发出的不同角度的荧光在部件内可以高效反射传输,同时具有一定的匀光作用。(The invention discloses a laser light source device and a laser projection system, comprising: the laser array, the fluorescence light guide component positioned at the light-emitting side of the laser array and the dodging component positioned at the side of the fluorescence light guide component departing from the laser array; the fluorescent crystal adopted by the fluorescent light guide component is a single-crystal fluorescent material, and as a fluorescent crystal pure substance, the fluorescent light guide component can bear higher temperature and can receive laser with higher energy emitted by the laser array without the problem of fluorescence conversion efficiency reduction. The laser has higher transmittance when being incident to the single crystal fluorescent material, and the laser can hardly be scattered in the laser transmission direction, so that the light loss is small, the laser path is more direct, and the excitation efficiency of the fluorescence can be effectively improved. And the full-wave-band reflecting film is plated on the surface of the fluorescent crystal, so that the fluorescent light at different angles excited by the laser can be efficiently reflected and transmitted in the component, and a certain light homogenizing effect is achieved.)

1. A laser light source device, comprising: the laser array, the fluorescence light guide component positioned at the light-emitting side of the laser array and the light homogenizing component positioned at the side of the fluorescence light guide component departing from the laser array; wherein the content of the first and second substances,

the fluorescent light guide member includes: the surface of the fluorescent crystal facing the laser array is an incident surface, the surface facing the light homogenizing part is an emergent surface, and the outer surface except the incident surface and the emergent surface is provided with a reflecting film layer;

the fluorescence light guide component is used for converting the received exciting light of the laser array into fluorescence with a set waveband, and the fluorescence is reflected and transmitted in the reflecting film layer;

the light homogenizing component is used for receiving emergent light of the fluorescent light guide component and homogenizing and transmitting the emergent light.

2. The laser light source device according to claim 1, wherein the light unifying member is a light guide tube having a cross-sectional dimension perpendicular to the laser light transmission direction larger than a cross-sectional dimension of the fluorescent light guide member perpendicular to the laser light transmission direction;

the light guide pipe and the fluorescent light guide component are separated by a set distance; or, part of the fluorescent light guide component is positioned inside the light guide pipe.

3. The laser light source device according to claim 1, wherein the dodging member is a fly eye lens group, and the fly eye lens group is spaced from the fluorescence light guide member by a set distance.

4. The laser light source device according to claim 1, wherein the fluorescent light guide member has a length parallel to the laser light transmission direction of 1 to 20 mm.

5. The laser light source device according to claim 1, wherein the laser light source device includes a plurality of fluorescent light guide members, the laser light source device further comprising: a plurality of transmission light guide components for transmitting and transmitting laser emitted by the laser array; the fluorescent light guide components and the transmission light guide components are alternately arranged in a row along the direction perpendicular to the laser transmission direction to form a wavelength conversion component, and the wavelength conversion component reciprocates along the row direction according to a set time sequence.

6. The laser light source device according to claim 5, wherein the fluorescence light guide member is divided into at least a first fluorescence light guide member for emitting fluorescence of a first wavelength band and a second fluorescence light guide member for emitting fluorescence of a second wavelength band;

in the first fluorescent light guide component, a first film layer for transmitting the exciting light and reflecting the first wavelength band fluorescent light is arranged on an incident surface of a fluorescent crystal, and a second film layer for transmitting the first wavelength band fluorescent light and reflecting the exciting light is arranged on an emergent surface of the fluorescent crystal;

in the second fluorescent light guide component, the incident surface of the fluorescent crystal is provided with a third film layer for transmitting the excitation light and reflecting the second waveband fluorescent light, and the emergent surface of the fluorescent crystal is provided with a fourth film layer for transmitting the second waveband fluorescent light and reflecting the excitation light.

7. The laser light source device according to claim 6, wherein the outgoing light from the laser array is blue light.

8. The laser light source device according to claim 7, wherein the fluorescent crystals in the fluorescent light guide members are the same, and the fluorescent light converted by the fluorescent crystals is yellow light; alternatively, the first and second electrodes may be,

the fluorescent crystals in the first fluorescent light-guide part are different from the fluorescent crystals in the second fluorescent light-guide part;

the fluorescence converted by the fluorescent crystal in the first fluorescent light guide component is yellow light; the fluorescence converted by the fluorescent crystal in the second fluorescent light-guide component is green light.

9. The laser light source device of claim 8, wherein the first film layer is configured to transmit blue light and reflect red light, and the second film layer is configured to transmit red light and reflect blue light; the third film layer is used for transmitting blue light and reflecting green light, and the fourth film layer is used for transmitting the green light and reflecting the blue light.

10. A laser projection system comprising the laser light source device according to any one of claims 1 to 9, a light valve modulation member located on a light exit side of the laser light source device, and a projection lens located on a light exit side of the light valve modulation member.

Technical Field

The invention relates to the technical field of projection, in particular to a laser light source device and a laser projection system.

Background

The laser has the advantages of high brightness, strong monochromaticity, wide color gamut and the like, is applied to the field of projection display, and has higher and higher requirements on output energy along with the increasing of the projection size of the laser display, so that higher requirements are put forward on a laser light source device.

At present, high-energy laser is widely used in laser light source devices to excite fluorescent powder to emit light so as to obtain full-wave band light for display. A fluorescent conversion member employed in a laser light source device generally includes a phosphor layer, and a substrate for carrying the phosphor layer. The size of the fluorescence conversion part cannot be too large due to the limitation of the design of the optical system; if the fluorescent wheel is adopted, the driving rotation speed cannot be infinitely increased due to the limitation of the rotation speed and the bearing of the motor; in order to realize smaller optical expansion and higher optical system efficiency, the thickness of the fluorescent powder layer is limited to a certain extent, and when the fluorescent powder layer exceeds a certain thickness, the deep fluorescent material cannot be excited, so that the excitation efficiency is reduced; meanwhile, the area of the laser spot irradiated on the surface of the fluorescent powder layer is also strictly controlled. In addition, in the laser light source device, a laser beam with high energy density generates a large amount of heat in unit time when irradiating the fluorescent powder layer, although the laser energy that the fluorescent powder can bear is high, because the fluorescent powder cannot be directly used in the fluorescent conversion part, a certain carrier needs to be mixed to fix the fluorescent powder on the substrate, the existing common carriers are silica gel, glass and ceramic, although the temperature resistance performance is different, the existing common carriers are limited by the assembly process, and the temperature resistance performance still cannot exceed the high-temperature bottleneck of 200 ℃. Even if the high temperature resistance of the fluorescent conversion part can be improved, due to the limitation of the thickness of the fluorescent powder layer, when the laser power exceeds a certain power density, the excitation efficiency of the fluorescent powder layer in a unit area is limited, so that the luminous capacity of the fluorescent powder layer is limited, and the luminous efficiency of the laser source device is lower.

Disclosure of Invention

The invention provides a laser light source device and a laser projection system, which are used for improving the fluorescence conversion efficiency and enabling the laser light source device and the laser projection system to output high energy and high efficiency.

In a first aspect, the present invention provides a laser light source device, including: the laser array, the fluorescence light guide component positioned at the light-emitting side of the laser array and the light homogenizing component positioned at the side of the fluorescence light guide component departing from the laser array; wherein the content of the first and second substances,

the fluorescent light guide member includes: the surface of the fluorescent crystal facing the laser array is an incident surface, the surface facing the light homogenizing part is an emergent surface, and the outer surface except the incident surface and the emergent surface is provided with a reflecting film layer;

the fluorescence light guide component is used for converting the received exciting light of the laser array into fluorescence with a set waveband, and the fluorescence is reflected and transmitted in the reflecting film layer;

the light homogenizing component is used for receiving emergent light of the fluorescent light guide component and homogenizing and transmitting the emergent light.

In a possible implementation manner, in the above laser light source device provided by the present invention, the light uniformizing member is a light guide, and a cross-sectional dimension of the light guide along a direction perpendicular to a laser light transmission direction is larger than a cross-sectional dimension of the fluorescent light guide along a direction perpendicular to the laser light transmission direction;

the light guide pipe and the fluorescent light guide component are separated by a set distance; or, part of the fluorescent light guide component is positioned inside the light guide pipe.

In a possible implementation manner, in the above laser light source device provided by the present invention, the dodging component is a fly eye lens group, and the fly eye lens group and the fluorescence light guide component are separated by a set distance.

In a possible implementation manner, in the above laser light source device provided by the present invention, the length of the fluorescent light guide member along the direction parallel to the laser light transmission direction is 1-20 mm.

In one possible implementation manner, in the above-described laser light source device provided by the present invention, the laser light source device includes a plurality of fluorescent light guide members, and the laser light source device further includes: a plurality of transmission light guide components for transmitting and transmitting laser emitted by the laser array; the fluorescent light guide components and the transmission light guide components are alternately arranged in a row along the direction perpendicular to the laser transmission direction to form a wavelength conversion component, and the wavelength conversion component reciprocates along the row direction according to a set time sequence.

In a possible implementation manner, in the above laser light source device provided by the present invention, the fluorescence light guide member is at least divided into a first fluorescence light guide member for emitting fluorescence of a first wavelength band and a second fluorescence light guide member for emitting fluorescence of a second wavelength band;

in the first fluorescent light guide component, a first film layer for transmitting the exciting light and reflecting the first wavelength band fluorescent light is arranged on an incident surface of a fluorescent crystal, and a second film layer for transmitting the first wavelength band fluorescent light and reflecting the exciting light is arranged on an emergent surface of the fluorescent crystal;

in the second fluorescent light guide component, the incident surface of the fluorescent crystal is provided with a third film layer for transmitting the excitation light and reflecting the second waveband fluorescent light, and the emergent surface of the fluorescent crystal is provided with a fourth film layer for transmitting the second waveband fluorescent light and reflecting the excitation light.

In a possible implementation manner, in the above laser light source device provided by the present invention, the outgoing light of the laser array is blue light.

In a possible implementation manner, in the laser light source device provided by the present invention, the fluorescent crystals in the fluorescent light guide members are the same, and the fluorescence converted by the fluorescent crystals is yellow light; or (c).

The fluorescent crystals in the first fluorescent light-guide part are different from the fluorescent crystals in the second fluorescent light-guide part;

the fluorescence converted by the fluorescent crystal in the first fluorescent light guide component is yellow light; the fluorescence converted by the fluorescent crystal in the second fluorescent light-guide component is green light.

In a possible implementation manner, in the above laser light source device provided by the present invention, the first film layer is configured to transmit blue light and reflect red light, and the second film layer is configured to transmit red light and reflect blue light; the third film layer is used for transmitting blue light and reflecting green light, and the fourth film layer is used for transmitting the green light and reflecting the blue light.

In a second aspect, the present invention provides a laser projection system, which includes any one of the above laser light source devices, a light valve modulation component located on the light exit side of the laser light source device, and a projection lens located on the light exit side of the light valve modulation component.

The invention has the following beneficial effects:

the invention provides a laser light source device and a laser projection system, comprising: the laser array, the fluorescence light guide component positioned at the light-emitting side of the laser array and the dodging component positioned at the side of the fluorescence light guide component departing from the laser array; wherein, fluorescence light guide part includes: the surface of the fluorescent crystal facing the laser array is an incident surface, the surface of the fluorescent crystal facing the light homogenizing part is an emergent surface, and the outer surface except the incident surface and the emergent surface is provided with a reflecting film layer; the fluorescence light guide component is used for converting the received exciting light of the laser array into fluorescence with a set wave band, and the fluorescence is reflected and transmitted in the reflecting film layer; and the light homogenizing component is used for receiving the emergent light of the fluorescent light guide component and uniformly transmitting the emergent light. The fluorescent crystal adopted by the invention is a single-crystal fluorescent material, and as a pure fluorescent crystal, the fluorescent crystal can tolerate higher temperature and can receive laser with higher energy emitted by the laser array without the problem of fluorescence conversion efficiency reduction. The laser has higher transmittance when being incident to the single crystal fluorescent material, and the laser can hardly be scattered in the laser transmission direction, so that the light loss is small, the laser path is more direct, and the excitation efficiency of the fluorescence can be effectively improved. And the full-wave-band reflecting film is plated on the surface of the fluorescent crystal, so that the fluorescent light at different angles excited by the laser can be efficiently reflected and transmitted in the component, and a certain light homogenizing effect is achieved.

Drawings

Fig. 1 is a schematic structural diagram of a laser light source device according to an embodiment of the present invention;

fig. 2 is a schematic side view of a fluorescent light guide member according to an embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of a fluorescent light guide member according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a laser light source device according to an embodiment of the present invention;

fig. 5 is a third schematic structural diagram of a laser light source device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a wavelength conversion device according to an embodiment of the present invention;

fig. 7 is a second schematic structural diagram of a wavelength conversion device according to an embodiment of the present invention;

fig. 8 is a schematic side view of a first fluorescent light guide member according to an embodiment of the invention;

fig. 9 is a schematic side view of a second fluorescent light guide member according to an embodiment of the invention;

FIG. 10 is a fourth schematic view illustrating a laser source device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a laser projection system according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a laser light source device and a laser projection system, which are used for improving the fluorescence conversion efficiency and enabling the laser light source device and the laser projection system to output high energy and high efficiency.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The laser light source device and the laser projection system provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a laser light source device provided in an embodiment of the present invention includes: the laser array 11, the fluorescence light guide member 12 located at the light emitting side of the laser array 11, and the dodging member 13 located at the side of the fluorescence light guide member 12 away from the laser array 11.

The side view structure of the fluorescent light guide 12 can be seen in fig. 2, and the cross-sectional structure of the fluorescent light guide 12 can be seen in fig. 3. As shown in fig. 2, the fluorescent light guide member 12 includes: and a fluorescent crystal 121, the surface of the fluorescent crystal facing the laser array is an incident surface, the surface facing the dodging member is an exit surface, and the outer surface except the incident surface and the exit surface is provided with a reflecting film layer 122.

The fluorescence light guide component 12 is used for converting the received excitation light of the laser array 11 into fluorescence with a set wavelength band, and reflecting and transmitting the fluorescence in the reflecting film layer; and a light uniformizing part 13 for receiving the emergent light from the fluorescent light guide part and uniformly transmitting the emergent light.

Taking the fluorescent light guide member shown in fig. 1-3 as an example, the fluorescent light guide member 12 provided by the embodiment of the present invention may be a quadrangular prism structure, and the cross section perpendicular to the laser transmission direction is a rectangle as shown in fig. 3, as shown in fig. 2, the left end surface of the fluorescent crystal 121 may be an incident surface of light, the right end surface may be an emergent surface of light, and the surface except the incident surface and the emergent surface is coated with a reflective film 122. In specific implementation, the reflecting film can be a full-wave-band reflecting film layer and is formed on the outer surface of the fluorescent crystal by adopting a coating process. The fluorescent crystal 121 is a novel single crystal fluorescent material, and when the excitation light irradiates the fluorescent crystal, the fluorescent crystal is excited to convert the fluorescence of the set wavelength band, and the single crystal fluorescent material has a certain transmittance, and the fluorescence in the set wavelength band and the excitation light that is not converted can be emitted through the fluorescent crystal. The single crystal fluorescent material is a pure object and can endure higher temperature, so that the single crystal fluorescent material can receive higher-energy laser emitted by a laser array without the problem of fluorescence conversion efficiency reduction. Compared with the fluorescent powder material adopted in the prior art, the fluorescent powder cannot be fixed on the substrate, the fluorescent powder needs to be mixed with colloid or inorganic material to form a mixture and fixed on the substrate, the exciting light is refracted in various media after the exciting light enters the fluorescent powder mixture, the fluorescent particles are excited to convert fluorescence when the laser reaches the fluorescent particles, the transmittance of the exciting light in the mixture is reduced, and part of energy is lost due to refraction in various media, so that the exciting efficiency of the fluorescent light is low, and the utilization efficiency of the laser light is also reduced. The embodiment of the invention directly adopts the single crystal fluorescent material which is a pure substance for fluorescence conversion, the laser has higher transmittance when entering the single crystal fluorescent material, and the laser is hardly scattered in the laser transmission direction, so that the light loss is small, the laser path is more direct, and the excitation efficiency of the fluorescence can be effectively improved. And the full-wave-band reflecting film is plated on the surface of the fluorescent crystal, so that the fluorescent light at different angles excited by the laser can be efficiently reflected and transmitted in the component, and a certain light homogenizing effect is achieved.

In practical applications, if the fluorescent light guide member is disposed to be too large along a length parallel to the laser light transmission direction, the transmittance of the fluorescent crystal is lowered, which is not favorable for converting the emission of the fluorescent light. Therefore, considering the requirements of wavelength conversion and optical transmittance, the fluorescent light guide member should not be set to have an excessively large length, and even if the fluorescent light guide member has a certain light-homogenizing effect, the light-homogenizing member 13 is still required to be set for homogenizing and transmitting the emitted fluorescent light and the excitation light in practical application.

In an implementation manner, as shown in fig. 1 and 4, the light uniformizing part may be a light guide (the light guide is denoted by reference numeral 13 in fig. 1 and 4), and a cross-sectional dimension of the light guide in the direction perpendicular to the laser light transmission direction is larger than a cross-sectional dimension of the fluorescent light guide in the direction perpendicular to the laser light transmission direction. In practical application, the installation form shown in fig. 1 can be adopted, so that the light guide pipe and the fluorescent light guide component are separated by a set distance; alternatively, a mounting form may be adopted such that a part of the fluorescent light guide member 12 is positioned inside the light guide tube as shown in fig. 4.

Specifically, the light guide is a hollow tubular member, and when the light guide is implemented, it is necessary to make all the light emitted from the fluorescent light guide 12 enter the light guide as much as possible, which requires strict control of the installation position and size of the fluorescent light guide 12 and the light guide in accordance with the optical design. The cross-sectional dimension of the light guide is required to be larger than that of the fluorescent light guide component, the distance between the light guide and the fluorescent light guide component also needs to consider the relation between the cross-sectional dimensions of the light guide and the fluorescent light guide component, and the light with the largest angle emitted by the fluorescent light guide component can be incident into the light guide as far as possible, so that most of the emitted light of the fluorescent light guide component can be incident into the light guide to be effectively and uniformly transmitted. If the emitting surface of the fluorescent light guide component 12 is arranged in the light guide, the emitting light of the fluorescent light guide component 12 can be ensured to be completely incident into the light guide as much as possible, the light receiving efficiency of the light guide is effectively improved, the occupied volumes of the fluorescent light guide component and the light homogenizing component can be reduced by adopting the arrangement mode, and the miniaturization of the laser light source device is facilitated.

In another practical way, as shown in fig. 5, the dodging component may also adopt a fly eye lens group 14, and the fly eye lens group 14 is spaced from the fluorescence light guide component 12 by a set distance. The fly-eye lens group is applied to an illumination system and can obtain high light energy utilization rate and large-area uniform illumination. In general, the fly-eye lens assembly includes two rows of fly-eye microlens arrays, wherein the focal point of each microlens unit in the first row of fly-eye microlens array coincides with the center of the corresponding microlens unit in the second row of fly-eye microlens array along the incident direction of light, at this time, the optical axes of the two rows of fly-eye microlens arrays are parallel to each other, in practical applications, a condenser lens may be disposed behind the light of the second row of fly-eye microlens array, and uniform illumination may be obtained on the focal plane of the condenser lens. In the embodiment of the invention, the focal length of the fly-eye lens group and the distance between the fluorescence light guide component and the fly-eye lens group can be adjusted according to the requirement of the optical system, so that the emergent light can meet the special requirement of the optical system.

When the size of the fluorescent light guide 12 is set, the requirements of wavelength conversion and optical transmittance in the optical system need to be considered comprehensively, and the transmittance of the fluorescent light guide 12 in the direction parallel to the laser transmission direction decreases with the increase of the set length, so that the length of the fluorescent light guide 12 cannot be set too large; if the length is set too small, the wavelength conversion requirement cannot be satisfied, and the converted fluorescence energy is low. Then, in the embodiment of the present invention, the length of the fluorescent light guide 12 in the direction parallel to the transmission direction of the laser light may be set to 1-20mm in consideration of the wavelength conversion requirement of the laser light source device in practical use. Regarding the cross-sectional dimension of the fluorescent light guide member 12, the cross-sectional dimension of the fluorescent light guide member 12 may be generally set to be larger than the spot dimension of the incident laser light, so that the excitation light is fully incident into the fluorescent crystal, and the laser light is prevented from being incident into the region outside the fluorescent light guide member, which reduces the laser use efficiency.

In practical applications, the laser light source device needs to be applied to a laser projection system, which can be a full-color projection display system, and needs a laser light source to output lights with different colors in a time-sequential manner, and the lights with different colors can be used as primary color lights for display, and through the modulation effect of the modulation component, images with rich colors can be displayed when finally projected to a screen. In the embodiment of the present invention, as shown in fig. 6, the laser light source device may include a plurality of fluorescent light guide members 12, and in addition, the laser light source device further includes: a plurality of transmission light guide members 15 for transmitting the transmission laser light emitted from the laser array; the fluorescent light guide members 12 and the transmissive light guide members 15 are alternately arranged in a row perpendicular to the laser light transmission direction to constitute a wavelength conversion member T which reciprocates in a row direction (a direction indicated by a double arrow in fig. 6) at a set timing. With the time-sequential movement of the wavelength conversion assembly, the laser light can enter the fluorescent light guide component 12 at some time sequences, so that the fluorescent crystal converts the excitation light into the fluorescence for emission, and the laser light enters the transmission light guide component at other time sequences, so that the laser light is directly transmitted, and thus the light with at least two wave bands of the fluorescence and the excitation light can be obtained at time sequences. In an embodiment, the light guide member may be a glass light guide for transmitting the excitation light.

Further, as shown in fig. 7, the fluorescent light guide member 12 is divided into at least a first fluorescent light guide member 12a for emitting the fluorescent light of the first wavelength band and a second fluorescent light guide member 12b for emitting the fluorescent light of the second wavelength band. Specifically, as shown in the schematic side view structural diagram of the first fluorescent light guide member 12a shown in fig. 8, in the first fluorescent light guide member 12a, the incident surface of the fluorescent crystal 121 is provided with a first film 123 for transmitting the excitation light and reflecting the first waveband fluorescent light, and the exit surface of the fluorescent crystal 121 is provided with a second film 124 for transmitting the first waveband fluorescent light and reflecting the excitation light; as shown in fig. 9, which is a schematic side view of the second fluorescent light guide member 12b, in the second fluorescent light guide member 12b, the incident surface of the fluorescent crystal 121 is provided with a third film 125 for transmitting the excitation light and reflecting the second wavelength band fluorescent light, and the emergent surface of the fluorescent crystal 121 is provided with a fourth film 126 for transmitting the second wavelength band fluorescent light and reflecting the excitation light.

The principle of coating the first fluorescent light guide member 12a on the incident surface and the emission surface is the same as that of coating the second fluorescent light guide member, and the principle of coating the first fluorescent light guide member 12a will be explained below. Firstly, a first film layer 123 for transmitting exciting light and reflecting first waveband fluorescence is arranged on an incidence surface of the fluorescent crystal, only the incidence of the exciting light is allowed, the exciting light is fully incident into the fluorescent crystal to excite the fluorescence with a set waveband, the first waveband belongs to the set waveband, and the converted fluorescence can be reflected to an emergence surface under the action of the first film layer on the incidence surface, so that the emergence of the first waveband fluorescence is facilitated; the second film 124 for transmitting the first waveband fluorescence reflection excitation light is arranged on the emergent surface of the fluorescent crystal, only the transmission of the first waveband fluorescence is allowed, the emergence of the excitation light is prevented, the excitation light is reflected back to the inside of the fluorescent crystal, the excitation light can act on the fluorescent crystal again, more fluorescence is converted, and meanwhile, the fluorescence emitted by the first fluorescent light guide component 12a is only the fluorescence of the first waveband. Because the exciting light can reciprocate in the fluorescent crystal, the length of the fluorescent crystal can be reduced, the fluorescent crystal with smaller length can achieve high-energy fluorescent output, the fluorescent conversion efficiency is improved, and the size of the fluorescent conversion system is further reduced. The working principle of the coating of the second fluorescent light guide member 12b is the same as that of the first fluorescent light guide member 12a, and the description thereof is omitted. Meanwhile, the fluorescence converted by the fluorescent crystal can be filtered by adopting a film coating mode, so that when the wavelength conversion assembly moves in a time sequence manner, light rays with different colors can be output in a time sequence manner, a color filtering component does not need to be arranged independently to be matched with the wavelength conversion assembly, the integrated design of converting the fluorescence and filtering is realized, the structure of the projection system is simplified, and the size of the projection system is reduced.

In a specific implementation, in the laser light source device provided in the embodiment of the present invention, the light emitted from the laser array may be blue light, besides, violet light, ultraviolet light, and the like may also be used as the excitation light, which is not limited herein. For example, when blue light is used as the excitation light, the emission wavelength band of the laser array may be 420-470 nm.

Further, the fluorescent crystals used in the fluorescent light-guiding members 12 can be made of the same single-crystal fluorescent material, for example, when blue light is used as the excitation light, the fluorescent crystals are YAG fluorescent crystals, which are yellow crystals and can be stimulated to emit yellow light of 500-670nm after receiving the blue light of 420-470 nm. The upper fluorescent light guide component made of the same fluorescent crystal material is matched with the coating films on the light incident surface and the light emergent surface of the fluorescent crystal to realize the emission of the fluorescent lights with different colors, so that the high-purity fluorescent lights with different colors can be emitted, only one fluorescent crystal material needs to be generated in the manufacturing process, and the process difficulty can be simplified. In practical applications, the first film 123 disposed on the incident surface of the fluorescent crystal in the first fluorescent light-guiding member 12a can be used for transmitting blue light and reflecting red light, and the second film 124 disposed on the emergent surface thereof can be used for transmitting red light and reflecting blue light; the third film 125 disposed on the incident surface of the fluorescent crystal in the second fluorescent light-guiding member 12b can be used for transmitting blue light and reflecting green light, and the fourth film 126 disposed on the exit surface thereof can be used for transmitting green light and reflecting blue light. In addition, the first fluorescent light guide component can also be used for emitting fluorescent light of other colors except for red, and the second fluorescent light guide component can also be used for emitting fluorescent light of other colors except for green, at this time, the material of the fluorescent crystal needs to be reasonably selected, and the coating films of the incident surface and the exit surface are matched, so that the working principle of the fluorescent light guide component is the same as the above principle, and the detailed description is omitted, and the fluorescent light guide component can be arranged according to actual needs during specific implementation, and is not limited herein.

In another embodiment, the fluorescent crystals in the fluorescent light guide members 12 can be made of different materials, for example, the fluorescent crystals in the first fluorescent light guide member 12a are different from the fluorescent crystals in the second fluorescent light guide member 12 b; wherein, the fluorescence converted by the fluorescent crystal in the first fluorescent light-guiding component 12a after receiving the irradiation of the blue excitation light can be yellow light; the fluorescent crystals in the second fluorescent light-guiding member 12b receive blue excitation light and convert the fluorescence into green light. In practical application, the fluorescent crystal stimulated to emit green fluorescence can be a green fluorescent crystal, the fluorescent crystal stimulated to emit yellow fluorescence can be a yellow fluorescent crystal, meanwhile, the first film layer arranged on the light incident surface of the yellow fluorescent crystal can be used for transmitting blue light and reflecting red light, and the second film layer arranged on the light emergent surface of the yellow fluorescent crystal can be used for transmitting red light and reflecting blue light; the third film layer arranged on the incident surface of the green fluorescent crystal can be used for transmitting blue light and reflecting green light, and the fourth film layer arranged on the emergent surface of the green fluorescent crystal can be used for transmitting green light and reflecting blue light. Wherein the yellow fluorescence band is 500-670nm, the green fluorescence band is 500-580nm, and the red fluorescence band is 580-670 nm. Compared with the implementation mode of adopting the same fluorescent crystal material to realize the emission of green and red fluorescence, the green fluorescence and the red fluorescence emitted by adopting the green fluorescent crystal have higher fluorescence use efficiency. This is because when the same fluorescent material is used to generate green light and red light, the wavelength range of the fluorescence converted by the fluorescent material must cover the wavelength ranges of red light and green light, and only the green light or red light is actually needed, so when the green light needs to be emitted, the converted red light is filtered by the coating film on the emitting surface; when red light needs to be emitted, the converted green light is filtered by the coating film on the emitting surface, only a small part of the converted fluorescence can be emitted, other fluorescence is not used, the using efficiency of the fluorescence is low, and the energy of the emitted fluorescence is not high. And if green fluorescent crystal is adopted to convert green light, most of converted fluorescence can penetrate through the film layer of the emergent surface, the use efficiency of the fluorescence is higher, and the energy of the emergent fluorescence is also higher. The red fluorescent crystal material produced by the current process means is not mature, and the red fluorescence is formed by adopting a mode of matching yellow fluorescent crystal with a coating; however, with the continuous progress of the process, when the stable red fluorescent crystal is manufactured, the red fluorescent crystal can be directly used as the first fluorescent crystal to achieve higher fluorescent use efficiency, and the embodiment of the present invention is not limited herein.

In any of the above embodiments, the conversion spectrum of the fluorescence is generally wide, and the fluorescence band used in practical applications is only a small range of the band, so that it is necessary to provide a film layer for enhancing the set band of reflection on the incident surface of the fluorescent crystal, and it is necessary to provide a film layer for enhancing the set band of transmission on the emission surface of the fluorescent crystal, so that the half-width peak of the emitted fluorescence is narrowed, and the display device is more suitable for display requirements. In the above example, if the excitation light is blue light, the first film layer may be configured to transmit blue light and reflect red light, and the second film layer may be configured to transmit red light and reflect blue light; the third film layer may be configured to transmit blue light to reflect green light and the fourth film layer may be configured to transmit green light to reflect blue light.

In practical applications, as shown in fig. 10, the laser light source device further includes: a shaping lens group 16 located between the laser array 11 and the wavelength conversion component T. The shaping lens group has double functions of focusing and collimating, can adjust emergent light beams of the laser array so as to enable the size of laser spots incident on the fluorescent light guide component to meet actual requirements, and meanwhile, the laser spots have higher energy.

Based on the same inventive concept, an embodiment of the present invention further provides a laser projection system, as shown in fig. 11, the laser projection system provided in the embodiment of the present invention includes any one of the laser source devices 100, a light valve modulation component 200 located on the light emitting side of the laser source device 100, and a projection lens 300 located on the light emitting side of the light valve modulation component 200. The laser light source device can output light rays with different colors to the light valve modulation component 200 in a time sequence manner, and the light valve modulation component 200 modulates the incident light rays with different colors in a time sequence manner, so that an image reflected to the projection lens 300 to be imaged meets the requirement.

In an implementation, the light valve modulating component 200 may be a Digital micromirror chip (DMD). The laser projection system provided by the embodiment of the invention can adopt a Digital Light Processing (DLP) framework, and the image signal is digitally processed, so that different colors of Light rays emitted by the laser Light source device in a time sequence are projected on the DMD chip, the DMD chip modulates and reflects the Light rays according to the Digital signal, and finally the Light rays are imaged on the projection screen through the projection lens.

The embodiment of the invention provides a laser light source device and a laser projection system, comprising: the laser array, the fluorescence light guide component positioned at the light-emitting side of the laser array and the dodging component positioned at the side of the fluorescence light guide component departing from the laser array; wherein, fluorescence light guide part includes: the surface of the fluorescent crystal facing the laser array is an incident surface, the surface of the fluorescent crystal facing the light homogenizing part is an emergent surface, and the outer surface except the incident surface and the emergent surface is provided with a reflecting film layer; the fluorescence light guide component is used for converting the received exciting light of the laser array into fluorescence with a set wave band, and the fluorescence is reflected and transmitted in the reflecting film layer; and the light homogenizing component is used for receiving the emergent light of the fluorescent light guide component and uniformly transmitting the emergent light. The fluorescent crystal adopted by the invention is a single-crystal fluorescent material, and as a pure fluorescent crystal, the fluorescent crystal can tolerate higher temperature and can receive laser with higher energy emitted by the laser array without the problem of fluorescence conversion efficiency reduction. The laser has higher transmittance when being incident to the single crystal fluorescent material, and the laser can hardly be scattered in the laser transmission direction, so that the light loss is small, the laser path is more direct, and the excitation efficiency of the fluorescence can be effectively improved. And the full-wave-band reflecting film is plated on the surface of the fluorescent crystal, so that the fluorescent light at different angles excited by the laser can be efficiently reflected and transmitted in the component, and a certain light homogenizing effect is achieved.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.