阅读说明：本技术 光源装置及显示设备 (Light source device and display device ) 是由 郭祖强 鲁宁 李屹 于 2018-09-03 设计创作，主要内容包括：本发明涉及一种光源装置及显示设备。所述光源装置包括激发光源、补充光源及色轮,所述激发光源用于发出第一颜色光至所述色轮,所述色轮包括第一发光区、波长转换区及补充发光区,所述第一发光区及所述波长转换区沿圆周方向依次排列,所述第一发光区在第一时段接收所述第一颜色光并发出所述第一颜色光,所述波长转换区在第二时段接收所述第一颜色光并发出受激光,所述补充发光区位于所述波长转换区的内侧或外侧,所述补充光源在所述第二时段发出拓宽色域且与所述受激光光谱至少部分重叠的补充光,所述补充光经由所述补充发光区出射后与所述波长转换区发出的所述受激光合光。(The invention relates to a light source device and a display device. The light source device comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting first color light to the color wheel, the color wheel comprises a first light emitting area, a wavelength conversion area and a supplementary light emitting area, the first light emitting area and the wavelength conversion area are sequentially arranged along the circumferential direction, the first light emitting area receives the first color light and emits the first color light in a first period, the wavelength conversion area receives the first color light and emits a laser beam in a second period, the supplementary light emitting area is positioned on the inner side or the outer side of the wavelength conversion area, the supplementary light source emits supplementary light which widens a color gamut and is at least partially overlapped with a spectrum of the laser beam in the second period, and the supplementary light is combined with the excited light emitted by the wavelength conversion area after being emitted by the supplementary light emitting area.)

1. A light source device characterized by: the light source device comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting first color light to the color wheel,

the color wheel comprises a first light emitting area, a wavelength conversion area and a supplementary light emitting area, wherein the first light emitting area and the wavelength conversion area are sequentially arranged along the circumferential direction, the first light emitting area receives the first color light and emits the first color light in a first period, the wavelength conversion area receives the first color light and emits a received laser in a second period,

the complementary light emitting region is positioned on the inner side or the outer side of the wavelength conversion region, the complementary light source emits complementary light which widens the color gamut and is at least partially overlapped with the stimulated light spectrum in the second time period, and the complementary light is combined with the stimulated light emitted by the wavelength conversion region after being emitted by the complementary light emitting region.

2. The light source device according to claim 1, wherein: the excitation light source comprises a first light source for emitting first color light in a first polarization state and a second light source for emitting first color light in a second polarization state, the light source device further comprises a polarization light splitting sheet and a light deflection device, the polarization light splitting sheet is provided with a first area and a second area, the second area is used for receiving the first color light in the first polarization state emitted by the first light source, the light deflection device is arranged between the second light source and the polarization light splitting sheet and is used for controlling the first color light in the second polarization state emitted by the second light source to be located in the first area in the first period and to be located in the second area in the second period,

in the first period, the first region emits the first color light with the second polarization state to the first light-emitting region, the second region emits the first color light with the first polarization state to the first light-emitting region, the first light-emitting region combines the first color light with the first polarization state and the second color light with the first polarization state and emits the combined first color light with the first polarization state and the second color light with the second polarization state,

in the second time interval, the second region emits the first color light in the first and second polarization states to the wavelength conversion region, the wavelength conversion region emits the excited light, and the supplementary light source emits the supplementary light to the supplementary light emitting region.

3. The light source device according to claim 2, wherein: in the first period, the light spots of the first color light in the first polarization state on the first light-emitting region are arranged in parallel and adjacent to the light spots of the first color light in the second polarization state; in the second time interval, the light spot of the laser in the wavelength conversion region and the supplementary light spot in the supplementary light emitting region are arranged in parallel and adjacent to each other.

4. The light source device according to claim 2, wherein: the light deflection device comprises a light deflection structure and a driving structure, wherein the light deflection structure is used for changing the light path of incident light, and the driving structure is used for controlling whether the light deflection structure is positioned on the light path of the first color light in the second polarization state.

5. The light source device according to claim 4, wherein: the light deflection structure is provided with a first reflecting surface and a second reflecting surface which are arranged oppositely, and the first color light of the second polarization state is deflected through the light path after the first reflecting surface and the second reflecting surface sequentially reflect.

6. The light source device according to claim 5, wherein: the light deflection structure comprises a light bar with a parallelogram section, the light bar further comprises an incident surface and an emergent surface, the incident surface is parallel to the emergent surface, and the first reflecting surface and the second reflecting surface are parallel and are connected between the incident surface and the emergent surface; or

The light deflection structure comprises a first reflecting mirror and a second reflecting mirror, the first reflecting mirror is provided with the first reflecting surface, the second reflecting mirror is provided with the second reflecting surface, the first reflecting mirror is used for receiving and reflecting the first color light in the second polarization state to the second reflecting mirror, and the second reflecting mirror is used for receiving and reflecting the light in the second polarization state to the polarization splitting sheet.

7. The light source device according to claim 2, wherein: the light source device further comprises a guiding device and a light collecting device, the guiding device is located between the polarization splitting sheet and the color wheel, the first color light in the first polarization state and the second polarization state emitted by the polarization splitting sheet is guided to the color wheel through the guiding device, and the guiding device further receives the laser beam emitted by the wavelength conversion region, the supplementary light emitted by the supplementary light emitting region and the first color light emitted by the first light emitting region and guides the laser beam, the supplementary light and the first color light to the light collecting device.

8. The light source device according to claim 7, wherein: the guiding device comprises an opening and a reflection concave surface positioned on the periphery of the opening, the first color light of the first polarization state and the first color light of the second polarization state emitted by the polarization light splitting sheet are guided to the color wheel through the opening, and the reflection concave surface receives and reflects the received laser light, the supplement light and the first color light to the light collecting device.

9. The light source device according to claim 7, wherein: the guiding device comprises an area diaphragm and a guiding element, the area diaphragm comprises a third area and a fourth area, the first color light in the first polarization state and the second polarization state emitted by the polarization splitting sheet is transmitted to the color wheel through the third area, the fourth area receives and reflects the laser beam emitted by the wavelength conversion area, the supplement light emitted by the supplement light emitting area and the first color light emitted by the first light emitting area to the guiding element, and the guiding element guides the laser beam, the supplement light and the first color light to the light collecting device.

10. The light source device according to claim 7, wherein: the guiding device comprises a dichroic sheet, a reflecting mirror and a guiding element, the dichroic sheet transmits the first color light of the first and second polarization states emitted by the polarization splitting sheet to the color wheel, the dichroic sheet receives and reflects the first color light emitted by the wavelength conversion region and the complementary light emitting region to emit the received laser light and the complementary light to the guiding element, the reflecting mirror receives and reflects the first color light emitted by the first light emitting region to the guiding element, and the guiding element guides the received laser light, the complementary light and the first color light to the light collecting device.

11. The light source device according to claim 9 or 10, wherein: the color wheel further comprises a filter area, the guiding element reflects the received laser light, the supplement light and the first color light to the filter area, and the filter area provides the filtered received laser light, the supplement light and the first color light to the light collecting device.

12. The light source device according to claim 11, wherein: the light source device further includes a collecting lens group and a relay lens, the collecting lens group is located between the guiding device and the color wheel, and the received laser light, the supplement light and the first color light are provided to the guiding element through the relay lens.

13. The light source device according to claim 2, wherein: the first light source and the second light source are both first color laser light sources, the first light emitting area also comprises a scattering layer, the supplementing light comprises second color laser and third color laser, the supplementing light comprises the second color laser light source and the third color laser light source, the received laser comprises second color received laser and third color received laser, the wavelength conversion area comprises a second color wavelength conversion area and a third color wavelength conversion area, the second color laser light source is started when the second color wavelength conversion area emits second color laser light, and the third color laser light source is started when the third color wavelength conversion area emits third color laser light.

14. The light source device according to claim 12, wherein: the light source device further comprises a dichroic sheet, the second color laser light source and the third color laser light source respectively emit the second color laser light and the third color laser light to the dichroic sheet, and the dichroic sheet is used for guiding the second color laser light and the third color laser light to the supplementary light emitting area.

15. The light source device according to claim 2, wherein: the light source device further comprises a first lens and a second lens, the first lens is located between the polarization beam splitter and the second lens, the second lens is located between the first lens and the color wheel, the first lens is used for guiding the first color light emitted by the polarization beam splitter to the second lens after converging, and the second lens is used for providing the first color light emitted by the first lens to the color wheel after collimating.

16. A display apparatus comprising a light source device and a spatial light modulator, the light source device emitting light to the spatial light modulator, the spatial light modulator modulating the light emitted by the light source device according to image data to generate image light, characterized in that: the light source device adopts the light source device of any one of claims 1 to 15.

Technical Field

The invention relates to the technical field of display, in particular to a light source device and display equipment.

Background

With the continuous development of the technology in the field of projection display, people have increasingly High requirements on parameters of projection equipment, and High brightness, HDR (High-Dynamic Range, High Dynamic Range image), High resolution (such as 4K) and as large as possible color gamut Range (DCI, rec.2020) become very popular concepts in the market of projector products at present. Compared with a bulb light source, an LED light source and a pure laser light source, the projection equipment using the laser fluorescent light source has the advantages of long service life, high brightness and high cost performance, and is an ideal choice for the light source of the existing projector. However, the fluorescence spectrum generated by laser excitation has a wide wavelength range, so that the color gamut is more limited than that of a pure laser light source in terms of expansion.

Currently, for a laser fluorescent light source, a commonly used method for achieving the rec.709 or DCI color gamut standard is to electronically correct and add a filter in the light path. As shown in fig. 1, in the laser fluorescence light source, a blue laser is used as an excitation light, the excitation light incident on the color wheel excites the phosphor to obtain green fluorescence and red fluorescence (the green fluorescence and the red fluorescence may also be referred to as an excited light), the fluorescence wavelength range is relatively wide, and the color is not saturated enough, so that the Notch filter 71 filters the green long wavelength and the red short wavelength to improve the color coordinates of the green light and the red light. In addition, because the efficiency of green fluorescence is high, and the efficiency of red fluorescence is low, that is to say, the red light in the tricolor light is too little and the green light is too much, the excessive green light is usually filtered by using an electronic correction mode, and the color coordinate of the white light matched with the tricolor light is ensured to meet the color gamut standard requirement.

The method for expanding the color gamut can reach the Rec.709 or DCI color gamut standard, but a part of fluorescence is filtered in the Notch filter and electronic correction process, so that the light efficiency of projection equipment is reduced, the final brightness is reduced, and the performance of the projection product is limited. In order to further solve the contradiction between the expansion of the color gamut range and the improvement of the brightness, a method for adding a red laser module in the light source is proposed. As shown in fig. 2, the blue laser module is divided into two parts, one part is used as excitation light to be incident on the color wheel to generate green light and red light, and the other part is used as blue light to be displayed. And meanwhile, a red laser module is added, the red light color coordinate is adjusted and the red light ratio is increased in a red laser and red fluorescence light combination mode, so that the red fluorescence ratio filtered by the Notch filter can be reduced, the problem of excessive green light is solved, and the light effect of the projector is improved.

However, after the red laser module is added to the light source, there is still fluorescence loss in the process of combining the red laser and the red fluorescence. As shown in fig. 2, the red laser light and the red fluorescent light are combined by the dichroic plate 61, and the dichroic plate transmits the red laser light and the blue laser light and reflects the red fluorescent light and the green fluorescent light. Generally, a 638nm dominant wavelength red laser is used, and the spectral width range is several nanometers; and the red fluorescence is broad spectrum light and has a partial overlapping region with the red laser spectrum. When the dichroic filters are combined, the red fluorescence in the wavelength region near 638nm is lost, but the red fluorescence in this region has high purity and a large percentage, and the red fluorescence efficiency is lowered.

In order to further improve the fluorescence light effect in the laser fluorescence light combination process, the light combination is carried out by utilizing the difference characteristic of the laser and the fluorescence optical expansion. As shown in fig. 3 (a), the fluorescence generated by the excited phosphor 51 is lambertian scattering, and the etendue is large; the laser light emitted from the laser 52 is approximately parallel light after passing through the collimating lens, and the etendue is small. The fluorescence is collimated by the light collection device and combined with the red laser light at the location of the area diaphragm 53. As shown in fig. 3 (b), the area diaphragm is divided into a transmission area 41 and a reflected red laser area 42. The laser optical expansion is small, and the laser optical expansion is converged in a first light-emitting area at the center of the diaphragm after passing through the focusing lens and is reflected; the fluorescence optical expansion is large, the spot area of the diaphragm in the incident area is large, most of the fluorescence is transmitted by the diaphragm, and the red fluorescence in the part overlapped with the red laser wavelength only has loss at the position of the area diaphragm. Therefore, the method for combining light by utilizing the etendue can further reduce the loss of red fluorescence and improve the light efficiency.

However, the larger the color gamut range required by the projection system is, the more the proportion of the red laser in the light source is, and meanwhile, the color coordinate of the green fluorescence can no longer meet the color gamut standard requirement, and a green laser module needs to be added. The increase of the laser proportion is difficult to realize by increasing the driving current, and the number of lasers is usually increased to increase the laser proportion in the laser fluorescence light combination process. In an actual light source structure, lasers are arranged in an array form, and if the number of the lasers is increased, the larger the area of an array of laser spots emitted from the lasers is, the larger the laser spots corresponding to the positions of the area diaphragms are, that is, the larger the diaphragm size of the diaphragm area is. Then the fluorescence loss also increases with the increase of the area during the laser fluorescence combining process. In addition, because the laser area reflected by the area diaphragm needs to reflect red laser and green laser (the red laser and the green laser can also be called as supplement light) at the same time and transmit fluorescence, the difficulty of the coating process is increased, and the cost is increased. Therefore, when the color gamut is wider (e.g., rec.2020), it is not practical to use the method of combining light by etendue.

Disclosure of Invention

In view of this, the present invention provides a light source device with a wide color gamut standard and a new light receiving and supplementing light combining mode, so as to improve the proportion of the supplementing light in the light combining process and avoid the decrease of the light receiving efficiency of the laser. In addition, the invention also provides display equipment adopting the light source device.

A light source device comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting first color light to the color wheel, the color wheel comprises a first light emitting area, a wavelength conversion area and a supplementary light emitting area, the first light emitting area and the wavelength conversion area are sequentially arranged along the circumferential direction, the first light emitting area receives the first color light and emits the first color light in a first period, the wavelength conversion area receives the first color light and emits a laser beam in a second period, the supplementary light emitting area is positioned on the inner side or the outer side of the wavelength conversion area, the supplementary light source emits supplementary light which widens a color gamut and is at least partially overlapped with a laser beam spectrum in the second period, and the supplementary light is combined with the excited light emitted by the wavelength conversion area after being emitted by the supplementary light emitting area.

A display device includes a light source device and a spatial light modulator, the light source device emits light to the spatial light modulator, the spatial light modulator modulates the light emitted by the light source device according to image data to generate image light, the light source device includes an excitation light source, a supplement light source and a color wheel, the excitation light source is used for emitting a first color light to the color wheel, the color wheel includes a first light emitting region, a wavelength conversion region and a supplement light emitting region, the first light emitting region and the wavelength conversion region are sequentially arranged along a circumferential direction, the first light emitting region receives the first color light and emits the first color light in a first period, the wavelength conversion region receives the first color light and emits a stimulated light in a second period, the supplement light emitting region is positioned inside or outside the wavelength conversion region, the supplement light source emits supplement light which widens a color gamut and at least partially overlaps with the stimulated light spectrum in the second period, the supplementary light is combined with the excited light emitted by the wavelength conversion region after being emitted by the supplementary light emitting region.

Compared with the prior art, the light source device adopts a light combination mode of the supplementary light and the excited light which is suitable for the wide color gamut standard, realizes the improvement of the proportion of the supplementary light by enabling the supplementary light to be emitted from the supplementary light emitting area on the color wheel to complete the light combination of the supplementary light and the excited light, avoids the increase of the laser loss caused by the expansion of the color gamut range under the existing light combination mode of the optical expansion amount, and has important practical value.

Drawings

Fig. 1 to 3 are schematic diagrams illustrating the structure and optical path principle of three prior art light source devices.

Fig. 4 is a schematic structural view of a light source device according to a first embodiment of the present invention.

Fig. 5 is a schematic plan view of the color wheel of the light source device shown in fig. 4.

Fig. 6 is a schematic view of the structure of the light deflecting device of the light source device shown in fig. 4.

Fig. 7 is a schematic diagram of an optical path of the light source device shown in fig. 4 in a first period.

Fig. 8 is a schematic diagram of an optical path of the light source device shown in fig. 4 in a second period.

Fig. 9 is a schematic structural view of a light source device according to a second embodiment of the present invention.

Fig. 10 is a schematic plan view of the area film of the light source device shown in fig. 9.

Fig. 11 is a schematic plan view of the color wheel of the light source device shown in fig. 9.

Fig. 12 is a schematic structural view of a light source device according to a third embodiment of the present invention.

Description of the main elements

Light source device 100, 200, 300

First light sources 101a, 201a, 301a

Second light sources 101b, 201b, 301b

Supplemental light source 102

Second color laser light sources 102a, 202a, 302a

Third color laser light sources 102b, 202b, 302b

Dichroic plates 109, 209, 309

Polarization beam splitter 103, 203, 303

First region 103a

Second region 103b

Light deflecting device 104, 204, 304

Color wheel 108, 208, 308

First light emitting zones 108a, 208a

Wavelength converting regions 108b, 208b

Supplemental light emitting regions 108c, 208c

First lens 105, 205, 305

Second lens 106, 206, 306

Collimator lenses 111, 211, 311

Light collecting means 110, 210, 310

Light deflecting structure 104a

Drive device 104b

Opening 107a

Reflective concave surface 107b

Filter region 208d

Regional diaphragm 207

Third region 207b

Fourth region 207c

Collection lens group 218, 318

Relay lenses 212, 312

Guide elements 213, 313

Reflecting mirror 315

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 4, fig. 4 is a schematic structural diagram of a light source device according to a first embodiment of the present invention. The light source device 100 includes an excitation light source 101, a supplemental light source 102, a dichroic sheet 109, a color wheel 108, a polarization splitting sheet 103, a light deflecting structure 104, a first lens 105, a second lens 106, a collimating lens 111, a guiding device 107, and a light collecting device 110.

The excitation light source 101 is configured to emit a first color light to the color wheel 108, and the excitation light source 101 includes a first light source 101a configured to emit the first color light in a first polarization state and a second light source 101b configured to emit the first color light in a second polarization state. The first light source 101a may include two or more lasers, the two or more lasers may be arranged in an array, and each laser may be correspondingly provided with a collimating lens 111 for collimating the first color light emitted by each laser. In this embodiment, the first color light is blue light, the first light source 101a and the second light source 101b are both blue laser light sources, the first color light in the first polarization state is blue P light, and the first color light in the second polarization state is blue S light and is both laser light.

Referring to fig. 5, fig. 5 is a schematic plan view of the color wheel 108 of the light source apparatus shown in fig. 4. The color wheel 108 includes a first light emitting region 108a, a wavelength conversion region 108b and a complementary light emitting region 108c, the first light emitting region 108a and the wavelength converting region 108b are sequentially arranged in a circumferential direction, the first light emitting zone 108a receives and reflects the first color light for a first period of time, the wavelength converting region 108b receives the first color light during the second period of time to produce stimulated light and reflects the stimulated light, the supplemental light emitting region 108c is located inside or outside the wavelength converting region 108b, the supplementary light emitting region 108c is a transmissive region and includes a scattering layer, supplementary light emitted by the supplementary light source 102 in the second period is transmitted and scattered by the supplementary light emitting region 108c and then combined with the excited light emitted by the wavelength conversion region 108b, wherein the supplemental light is for widening a color gamut and at least partially overlaps with the stimulated light spectrum. It should be understood that, in the present embodiment, the first light emitting region 108a and the wavelength converting region 108b are reflective regions, the complementary light emitting region 108c is a transmissive region, and the light combination of the first color light and the laser receiving light is completed at the color wheel 108, but it should be understood that, in a modified embodiment, the light combination of the first color light and the laser receiving light can be completed at the color wheel 108 in a similar manner in a manner that the first light emitting region 108a and the wavelength converting region 108b can also be transmissive regions and the complementary light emitting region 108c is a reflective region, and therefore, the transflective characteristics of the regions of the color wheel 108 are not limited to the above, and can be set according to actual needs.

In this embodiment, the first light-emitting region 108a emits a first color light, which is blue light, and therefore the first light-emitting region 108a may be denoted as a first light-emitting region B. Further, the first light emitting area 108a also includes a scattering layer, that is, the first light emitting area 108a is configured to receive the first color light and scatter and reflect the first color light. The supplementary light emitting region 108c may be located inside the wavelength conversion region 108b, and a sum of a width of the supplementary light emitting region 108c and a width of the wavelength conversion region 108b may be equal to a width of the first light emitting region 108a, so that the three form a complete circle.

The excited light emitted from the wavelength conversion region 108b includes a second color excited light and a third color excited light, wherein the second color may be one of red and green, and the third color may be the other of red and green. The wavelength conversion region 108b includes a second color wavelength conversion region R emitting a second color stimulated light and a third color wavelength conversion region G emitting a third color stimulated light. It will be appreciated that the second colour wavelength converting region R may be provided with a red wavelength converting material and the third colour wavelength converting region may be provided with a green wavelength converting material.

Further, the complementary light may also include a second color laser and a third color laser, that is, the complementary light source 102 includes a second color laser light source 102a and a third color laser light source 102b, the second color laser light source 102a is turned on when the second color wavelength conversion region R emits the second color excited light, and the third color laser light source 102b is turned on when the third color wavelength conversion region G emits the third color excited light. The second color laser light source 102a and the third color laser light source 102b respectively emit the second color laser light and the third color laser light to the dichroic plate 109, and the dichroic plate 109 is configured to guide the second color laser light and the third color laser light to the complementary light emitting region 108 c. It is understood that a collimating lens 111 may be disposed in front of each of the second color laser light sources 102a and the third color laser light sources 102b for collimating the second color laser light and the third color laser light.

The polarization beam splitter 103 has a first region 103a and a second region 103b, the second region 103b is configured to receive the first color light with the first polarization state emitted from the first light source 101a, and the light deflection device 104 is disposed between the second light source 101b and the polarization beam splitter 103 and configured to control the first color light with the second polarization state emitted from the second light source 101b to be located in the first region 103a during the first period and to be located in the second region 103b during the second period. Specifically, during the first period, the first region 103a emits the first color light with the second polarization state to the first light emitting region 108a of the color wheel 108, the second region 103b emits the first color light with the first polarization state to the first light emitting region 108a, and the first light emitting region 108a emits the first color light with the first and second polarization states. In the second period, the second region 103b emits the first color light of the first and second polarization states to the wavelength conversion region 108b, the wavelength conversion region 108b emits the excited light, and the supplemental light source 102 emits the supplemental light with the same color as the excited light to the supplemental light emitting region 108c, because the wavelength conversion region 108b is disposed adjacent to the supplemental light emitting region, a spot of the excited light of the wavelength conversion region 108b is adjacent to a spot of the supplemental light emitting region 108c, and emits the light in the same direction, that is, the excited light emitted from the wavelength conversion region 108b and the supplemental light with the same color emitted from the supplemental light emitting region 108c realize combined light at the color wheel 108.

In this embodiment, in the first period, the light spots of the first color light in the first and second polarization states on the first light-emitting region 108a are both rectangular light spots, and the light spot of the first color light in the first polarization state on the first light-emitting region 108a and the light spot of the first color light in the second polarization state are arranged in parallel and adjacent to each other, and both of them also form a first color light spot. In the second period, the stimulated light spot of the wavelength conversion region 108b and the complementary light spot of the complementary light emitting region 108c are juxtaposed and adjacent to each other.

Referring to fig. 6, fig. 6 is a schematic structural diagram of the light deflecting device 104 of the light source device 100 shown in fig. 4. The light deflecting device 104 includes a light deflecting structure 104a and a driving structure 104b, the light deflecting structure 104a is configured to change an optical path of incident light, and the driving structure 104b is configured to control whether the light deflecting structure 104a is located on an optical path of the first color light of the second polarization state emitted by the second light source 101 b. Specifically, the light deflecting structure 104a has a first reflecting surface 104c and a second reflecting surface 104d which are oppositely disposed, and the light path of the first color light in the second polarization state is shifted after the first color light is sequentially reflected by the first reflecting surface 104c and the second reflecting surface 104 d. In this embodiment, the light deflecting structure 104a includes a light rod having a parallelogram cross section, the light rod further includes an incident surface 104e and an emitting surface 104f, the incident surface 104e is parallel to the emitting surface 104f, the first reflecting surface 104c is parallel to the second reflecting surface 104d and both connected between the incident surface 104e and the emitting surface 104f, and an included angle between the first reflecting surface 104c and the incident surface 104e is 45 degrees. However, in an alternative embodiment, the light deflecting structure 104a may include a first mirror having the first reflecting surface and a second mirror having the second reflecting surface, which are disposed in parallel, the first mirror being configured to receive and reflect the first color light of the second polarization state to the second mirror, and the second mirror being configured to receive and reflect the light of the second polarization state to the polarization splitting sheet 103.

The first lens 105 is located between the polarization beam splitter 103 and the second lens 106, the second lens 106 is located between the first lens 105 and the color wheel 108, the first lens 105 may be a convex lens, and is configured to converge and guide the first color light emitted by the polarization beam splitter 103 to the second lens 106, and the second lens 106 may be a concave lens, and is configured to collimate and provide the first color light emitted by the first lens 105 to the color wheel 108.

The guiding device 107 is located between the polarization splitting sheet 103 and the color wheel 108, and specifically, may be located between the second lens 106 and the color wheel 108, the first color light of the first and second polarization states emitted by the polarization splitting sheet 103 is guided to the color wheel 108 through the guiding device 107, and the guiding device 107 further receives the first color light emitted by the first light emitting region 108a and the stimulated light and the supplementary light emitted by the wavelength conversion region 108b and the supplementary light emitting region 108c and guides the stimulated light, the supplementary light and the first color light to the light collecting device 110.

In this embodiment, the guiding device 107 includes a light reflecting bowl, the light reflecting bowl includes an opening 107a and a reflective concave surface 107b located at the periphery of the opening 107a, the first color light of the first and second polarization states emitted by the polarization splitting sheet 103 is guided to the color wheel 108 through the opening 107a, and the reflective concave surface 107b receives and reflects the received laser light, the complementary light, and the first color light emitted by the color wheel 108 to the light collecting device 110.

The light collecting device 110 may be a square bar, and is disposed on one side (e.g., an upper side) of the color wheel 108, and the laser light, the supplement light, and the first color light guided by the guiding device 107 are all guided to an inlet of the square bar, and enter a rear end optical device (e.g., a spatial light modulation system) after being processed by the square bar for dodging, so as to be modulated to display image light for an image.

The principle of the optical path when the light source device 100 operates will be described below. When the light source device 100 is in operation, the driving device 104b controls the light deflecting structure 104a to move periodically, so that the light deflecting structure 104a is periodically located on the optical path of the first color light in the second polarization state emitted by the second light source 101 b. The color wheel 108 also continuously rotates, so that the first light emitting region 108a and the wavelength conversion region 108b are sequentially located on the light path of the first color light emitted by the polarization splitting sheet 103, the complementary light source 102 emits complementary light having the same color as the received laser light when the wavelength conversion region 108b emits the excited light, and thus the first light emitting region 108a emits the first color light in a first period, and the wavelength conversion region 108b and the complementary light emitting region 108c emit the combined light of the received laser light and the complementary light in a second period.

Specifically, referring to fig. 7, in a first time period, the driving device 104b controls the light deflecting structure 104a to be located on the light path of the first color light in the second polarization state emitted by the second light source 101b, the first light source 101a emits the first color light in the first polarization state to the second region 103b of the polarization splitting plate 103, the second light source 101b emits the first color light in the second polarization state to the first region 103a of the polarization splitting plate 103 through the light deflecting structure 104a, wherein the second region 103b can transmit the first color light in the first polarization state and reflect the first color light in the second polarization state; the first region 103a may reflect the first color light of the second polarization state, the light spot of the first color light of the first polarization state may be separated from the light spot of the first color light of the second polarization state, the first color light of the first polarization state is incident to a lower half portion of the first lens 105, the first color light of the second polarization state is incident to an upper half portion of the first lens 105, the first lens 105 guides the first color light of the first polarization state and the first color light of the second polarization state to the second lens 106 and then converges, the first color light of the first polarization state and the first color light of the second polarization state are collimated by the second lens 106 and transmitted to the first light emitting region 108a of the color wheel 108 through the opening 107a of the guiding device 107, wherein the first color light of the first polarization state may be imaged on an upper half portion of the first light emitting region 108a, the first color light of the second polarization state can be imaged in the lower half of the first light emitting region, the total width of the light spots formed on the first light emitting region 108a by the first color light of the first and second polarization states is substantially equal to the width of the first light emitting region 108a, the first color light emitted by the second lens 106 is scattered and reflected by the first light emitting region 108a and provided to the concave reflecting surface 107b, the concave reflecting surface 107b reflects the first color light to the inlet of the light collecting device 110, and the light collecting device 110 further combines and homogenizes the first color light and provides the homogenized first color light to a back-end device for further processing, such as an optical machine (e.g., a spatial light modulation system) for the first color image light modulated to display an image.

Referring to fig. 8, in a second time period, the driving device 104b controls the light deflecting structure 104a not to be located on the light path of the first color light in the second polarization state emitted by the second light source 101b, the first light source 101a emits the first color light in the first polarization state to the second region 103b of the polarization splitting plate 103, the second light source 101b also emits the first color light in the second polarization state to the second region 103b of the polarization splitting plate 103, the second region 103b combines the first color light in the first polarization state and the first color light in the second polarization state, wherein the second region 103b can transmit the first color light in the first polarization state and reflect the first color light in the second polarization state to combine the first color light and the second color light, a light spot of the first color light in the first polarization state can exactly coincide with a light spot of the first color light in the second polarization state, the combined first color light enters the first lens 105; the first lens 105 is a convex lens, and the combined first color light is incident to the lower half portion of the first lens 105, so that the combined first color light is guided to the second lens 106 to be converged, the second lens 106 collimates the converged first color light, and the collimated first color light is transmitted to the wavelength conversion region 108b of the color wheel 108 through the opening 107a of the guiding device 107.

In the second period, when the first color light is incident on the second color wavelength conversion region R of the wavelength conversion region 108b, the spot width of the first color light formed on the wavelength conversion region 108b is substantially equal to the width of the wavelength conversion region 108b, the second color wavelength conversion material on the second color wavelength conversion region R is excited to generate the second color stimulated light, the second color stimulated light is reflected to the reflective concave surface 107b of the guiding device 107, the second color laser light source 102a of the complementary light source 102 is turned on and the third color laser light source 102b is turned off, the second color laser light source 102a emits the second color laser light to the partial complementary light emitting region 108c adjacent to the second color wavelength conversion region R, the width of the second color laser light spot on the partial complementary light emitting region 108c is substantially equal to the width of the complementary light emitting region 108c, the partially complementary light emitting region 108c transmits and scatters the second color laser light, so that the second color laser light of the complementary light emitting region 108c and the second color excited light emitted by the second color wavelength conversion region R are combined, the scattered second color laser light is also guided to the reflective concave surface 107b, the reflective concave surface 107b reflects both the second color excited light and the second color laser light to the inlet of the light collecting device 110, and the light collecting device 110 further combines and homogenizes the second color excited light and the second color laser light and provides the resultant light to a back-end device for further processing, such as an optical-mechanical device (e.g., a spatial light modulation system) for modulating to display a second color image light for an image. The second color laser and the second color laser form a uniform light spot after being homogenized by the light collecting device 110, and the speckle effect of the laser is well eliminated due to the uniform mixing of the laser and the stimulated light.

In the second period, when the first color light is incident on the third color wavelength conversion region G of the wavelength conversion region 108b, the third color wavelength conversion material on the third color wavelength conversion region G is excited to generate a third color stimulated light, the third color stimulated light is reflected to the reflective concave surface 107b of the guiding device 107, the third color laser light source 102b of the complementary light source 102 is turned on and the second color laser light source 102a is turned off, the third color laser light source 102b emits the third color laser light to the partial complementary light emitting region 108c adjacent to the third color wavelength conversion region R, and the partial complementary light emitting region 108c transmits and scatters the third color laser light, so that the third color laser light of the complementary light emitting region 108c is combined with the third color stimulated light emitted by the third color wavelength conversion region G, the scattered third color laser light is also guided to the reflective concave surface 107b, the reflective concave surface 107b reflects both the third color stimulated light and the third color laser light to the inlet of the light collection device 110, and the light collection device 110 further combines and homogenizes the third color stimulated light and the third color laser light and provides the resultant light to a back-end device for further processing, such as an optical and mechanical device (e.g., a spatial light modulation system) for modulating to display a third color image light for displaying an image.

Compared with the prior art, the light source device 100 of the present invention adopts a combined light mode of the supplementary light and the excited light suitable for the wide color gamut standard, and completes the combined light of the supplementary light and the excited light by transmitting the supplementary light from the supplementary light emitting region 108c having the scattering layer on the reflective color wheel 108, thereby realizing the improvement of the proportion of the supplementary light, avoiding the increase of the loss of the excited light caused by the expansion of the color gamut range in the existing combined light mode of the optical expansion amount, and having important practical value.

Further, in the present invention, the first color light emitted from the first light source 101a and the second light source 101b is in different polarization states, and then the first color light in different polarization states is combined by the polarization beam splitter 103, and the combined first color light is imaged on the color wheel 108 through the first lens 105 and the second lens 106. Because the lasers of the first light source 101a and the second light source 101b are arranged in an array manner, the light spots of the first light source 101a and the second light source 101b emitted after passing through the collimating lens 111 are separated from each other, so that the laser light spots imaged on the color wheel 108 may not coincide with each other, the laser power density incident on the color wheel 108 is reduced, and the fluorescence light effect is ensured. When the first color light enters the color wheel 108 as the excitation light of the stimulated light, the light path of the first color light in the first polarization state emitted by the first light source 101a coincides with the light path of the first color light in the second polarization state emitted by the second light source 101b after the first color light and the second color light are combined, at this time, the imaging positions of the laser spots of the first light source 101a and the second light source 101b on the color wheel 108 are the same, the laser power density of the incident fluorescent powder layer is high, the position of the second light source can be finely adjusted, so that the spot imaged in the wavelength conversion area 108b of the color wheel 108 is separated from the position of the laser spot of the first light source 101a, and the stimulated light effect is further improved.

As shown in fig. 5, the first light-emitting region 108a of the color wheel 108 corresponding to the first color light display (e.g., blue light display) is a reflective scattering sheet, which is used for decoherence and reducing the speckle phenomenon of the projection display; the display part (such as green light and red light display part) corresponding to the second color and the third color is divided into two concentric circles, the outer circle is a wavelength conversion material layer, the first color light enters the wavelength conversion material layer to generate second or third color excited light (such as red or green fluorescence), the complementary light emitting area 108c of the inner circle is a scattering layer, the complementary light source 102 is turned on to emit second color complementary light and third color complementary light in the time period corresponding to the generation of the second color excited light and the third color excited light and transmits the second color complementary light and the third color complementary light from the scattering layer of the color wheel 108, and the light is combined with the excited light after the decoherence is completed.

Since the supplemental light source 102 is not turned on during the first color light display period, in order to avoid the display non-uniformity problem, it is necessary to ensure that the first color light spot emitted from the color wheel 108 is consistent with the second color light/third color light spot, so that the size and the angle of the light spot incident on the light collecting device 110 are consistent, and therefore, the light deflecting structure 104a is modulated to be in the path of the laser light emitted from the second light source 101 b. At this time, the first color light is reflected twice by the light deflecting structure 104a, and then the light beam is translated, and enters a position corresponding to the second color supplement light/third color supplement light transmission scattering layer, and meanwhile, the first color light emitted by the first light source 101a enters a position corresponding to the wavelength conversion region 108b, so that the consistency of the emergent light spots of the first color light is ensured.

The angle of the excited light generated by the wavelength conversion region of the color wheel 108 and the supplementary light scattered by the transmissive or reflective scattering layer is very large when the excited light exits the color wheel, in this embodiment, a light reflecting bowl having the reflective concave surface 107b is used to collect a large-angle light beam exiting the color wheel 108, wherein the central region of the light reflecting bowl is hollowed to form the opening 107a, the blue laser is transmitted from the opening 107a and then enters the color wheel 108, the reflective concave surface 107b is formed by plating a high reflective surface on the side of the light reflecting bowl facing the color wheel 108, and most of the laser and fluorescent light exiting the color wheel 108 are reflected by the reflective concave surface 107b of the light reflecting bowl and then enter the light collecting device 110.

Referring to fig. 9, 10 and 11, fig. 9 is a schematic structural diagram of a light source device 200 according to a second embodiment of the present invention, fig. 10 is a schematic plan structural diagram of a region membrane 207 of a guiding device 207 of the light source device 200 shown in fig. 9, and fig. 11 is a schematic plan structural diagram of a color wheel 208 of the light source device 200 shown in fig. 9. The light source device 200 is substantially the same as the light source device 100 of the first embodiment, that is, the above description of the light source device 100 is substantially applied to the light source device 200 of the second embodiment, and the main differences are that: the structure of the guiding means 207, the structure of the color wheel 208, and the position of the light collecting means 210 are different from those in the first embodiment.

Specifically, the guiding device 207 includes an area film 207 and a guiding element 213, the area film 207 includes a third area 207b and a fourth area 207c, the third area 207b is a first color light transmission area, the fourth area 207c can be a reflection area, the first color light of the first and second polarization states emitted by the polarization splitter 203 is transmitted to the color wheel 208 through the third area 207b, the fourth area 207c receives and reflects the first color light emitted by the wavelength conversion area 208b and the complementary light emitting area 208c and emitted by the first light emitting area a208 to the guiding element 213, and the guiding element 213 guides the first color light, the complementary light and the laser light to the light collecting device 210.

Further, the color wheel 208 further includes a filter region 208d, the guiding element 213 guides the stimulated light, the supplemental light and the first color light to the filter region 208d, and the filter region 208d provides the filtered stimulated light, the supplemental light and the first color light to the light collecting device 210.

Furthermore, the light source apparatus 200 may further include a collecting lens group 218 and a relay lens 212, the collecting lens group 218 is located between the area diaphragm 207 of the guiding apparatus 207 and the color wheel 208, and the received laser light, the supplement light and the first color light are provided to the guiding element 213 through the relay lens 212.

It is understood that the reflected first color light emitted from the color wheel 208 is collected by the collecting lens group 218 and then enters the area diaphragm 207 again, and since the etendue of the first color light becomes larger after being scattered, most of the first color light is reflected by the third area 207b of the area diaphragm 207 and enters the light collecting device 210 through the relay lens 212 and the guiding element 213. In this embodiment, the light collecting device 210 may be located below the color wheel 208.

Further, as shown in fig. 11, the color wheel 208 may be changed into a concentric three-circle structure, the outermost circle is the wavelength conversion region 208b, and the first color light is incident on the wavelength conversion region 208b to generate the stimulated light; the middle circle is a supplementary light emitting region 208c with a scattering layer, supplementary light is transmitted through the supplementary light emitting region 208c and is combined with the stimulated light, and a first light emitting region 208a of a first color display part corresponding to the wavelength conversion region 208b and the supplementary light emitting region 208c is a reflective scattering sheet; the innermost circle is a filter area 208d for filtering out the wavelength part with insufficient color saturation in the received laser light, and expanding the color gamut range of the projection system. It is understood that the filter region 208d can be divided into three regions RF, BF and GF corresponding to the first color light, the second color laser light and the third color laser light.

In the first embodiment, when the guiding device 107 of the light reflecting bowl is used for light collection, the first color light, the received laser light and the supplementary light emitted from the color wheel 108 are directly transmitted when entering the opening 107a of the guiding device 107, and the first color light, the received laser light and the supplementary light are all lost, in the second embodiment, the guiding device 207 has the collecting lens group 218, and the regional membrane 207 for transmitting the first color light is specifically arranged, so that the loss of the received laser light and the supplementary light can be effectively reduced; for the first color light, since the polarization state of the first color light is changed after being scattered, and the first color light can be basically regarded as unpolarized light, the polarization characteristics of the laser light can also be utilized, and when the area film 207 transmits incident blue laser light of a specific polarization state and reflects blue light of another polarization state, the blue light loss is further reduced. In addition, the collection lens set 218 can effectively reduce the volume of the light source device 200, and is more practical than the guiding device 107 of the reflecting bowl.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a light source device 300 according to a third embodiment of the present invention. The light source device 300 is substantially the same as the light source device 200 of the second embodiment, that is, the above description of the light source device 200 is substantially applied to the light source device 300 of the third embodiment, and the main differences are as follows: the guide device 307 is different in structure from that in the second embodiment.

In the third embodiment, a dichroic sheet 307a and a reflecting mirror 315 are used instead of the area diaphragm 207 in the second embodiment, the first color light in the first and second polarization states emitted by the polarization splitting sheet 303 is transmitted to the color wheel 308 through the dichroic sheet 307a, the dichroic sheet 307a receives and reflects the first color light emitted by the wavelength conversion region and the complementary light emitting region to the guiding element 313 through the collecting lens group 318, the reflecting mirror 315 receives and reflects the first color light emitted by the first light emitting region to the guiding element 313 through the relay lens 312, and the guiding element 313 guides the received laser light, the complementary light and the first color light to the light collecting device 310.

In the third embodiment, the area film is changed into the dichroic sheet 307 and the reflecting mirror 315, the portion of the color wheel 308 corresponding to the first color light is displayed as the reflecting mirror 315, and the filter section corresponding to the first color light is a scattering sheet for laser decoherence of the first color light, so as to reduce the speckle phenomenon.

The dichroic plate 307a transmits blue light, reflects the stimulated light and the supplemental light (i.e., reflects the second color light and the third color light). The laser beams of the first color light emitted by the first light source 301a and the second light source 301b are shifted downward with respect to the wavelength conversion region and the complementary light emitting region center of the color wheel 308, the first color light is transmitted by the dichroic sheet 307a and then obliquely enters the color wheel 308, the portion of the color wheel displayed corresponding to the first color light is reflected, and due to the small optical expansion of the laser light, the reflected first color light is transmitted by the dichroic sheet 307a and then reflected by the reflecting mirror 315, and then passes through the relay lens 312, the guiding element 313 and the scattering sheet corresponding to the color filtering region on the color wheel 308 and then is scattered to enter the light collecting device 310. The imaging process is from the color wheel 308 to the entrance of the light collection device 310, and the first color light spot on the color wheel 308 is the same as the second color light spot and the third color light spot, so the light spot of the first color light incident on the light collection device 310 is also the same as the second color light spot and the third color light spot, ignoring the aberration introduced by the lens.

In this embodiment, the lens of the area diaphragm is no longer used for the incidence and the emergence of the first color light on the color wheel 308, so that the area loss of the first color light when the first color light emerges from the color wheel 308 is eliminated, and the first color light effect and the image display effect are improved.

It is to be understood that in the second and third embodiments, the first light sources 201a, 301a, the second light sources 201b, 301b, the supplemental light sources 202a, 202b, 302a, 302b, the dichroic plates 209, 309, the polarization splitting plates 203, 303, the light deflection structures 204a, 204b, 304a, 304b, the first light emitting regions, the wavelength conversion regions and the supplemental light emitting regions of the color wheels 208, 308, the first lenses 205, 305, the second lenses 206, 306, the collimating lenses 211, 311 and the light collecting devices 210, 310 are substantially the same as the first light sources 101a, the second light sources 101b, the supplemental light sources 102a, 102b, the dichroic plates 109, the polarization splitting plates 103, the light deflection structures 104a, 104b, the first light emitting regions, the wavelength conversion regions and the supplemental light emitting regions of the color wheels 108, the first lens 105, the second lens 106, the collimating lens 111 and the light collecting devices 110 in the first embodiment, and thus the second and third embodiments have no structure, but do not affect the understanding of those skilled in the art.

The present invention also provides a Display apparatus that can be applied to a projector, an LCD (liquid crystal Display) Display, or the like, and that can include a light source device that employs the light source devices 100, 200, and 300 of the above embodiments and the light source devices of the modified embodiments thereof, a spatial light modulator, and a projection lens. The spatial light modulator is configured to modulate an image according to light emitted from the light source device and input image data to output image light, and the projection lens is configured to project an image according to the image light to display a projected image. The display device including the light source device according to the light source devices 100, 200, and 300 of the above embodiments and the modifications thereof has the advantages of high luminance, compact structure, small size, and the like.

It is to be understood that the light source devices 100, 200, and 300 according to the above embodiments of the present invention and the light source devices according to the modified embodiments thereof may be used in a stage light system, a vehicle-mounted lighting system, an operation lighting system, and the like, and are not limited to the above-described display devices.

It is to be understood that in the above embodiments, the "guiding" of the various components (such as the light splitting component, the guiding component and the light combining component) to the various lights may be "transmissive" or "reflective", and can be realized by wavelength splitting/combining, polarization splitting/combining, and/or area splitting/combining, and therefore, the various modified embodiments cannot be exhausted, and thus, the various modified embodiments are not described herein again, but a person of ordinary skill in the art can complete various modified embodiments based on the content described in this application to realize the "guiding" of the various lights.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.