CN109696791B

CN109696791B - Color wheel, light source system and display device

Info

Publication number: CN109696791B
Application number: CN201710994175.2A
Authority: CN
Inventors: 张宝英; 欧计敏; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2017-10-23
Filing date: 2017-10-23
Publication date: 2021-08-03
Anticipated expiration: 2037-10-23
Also published as: CN109696791A; WO2019080369A1

Abstract

The invention relates to a color wheel, a light source system and a display device. The light source system comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting excitation light, the supplementary light source is used for emitting supplementary light, the color wheel comprises at least two segmentation areas which are sequentially arranged along the circumferential direction, and the at least two segmentation areas comprise a first segmentation area and a second segmentation area which are sequentially arranged along the circumferential direction; the color wheel further comprises a supplementary region, the supplementary region is arranged on the inner side or the outer side of the first sectional region, the first sectional region is used for receiving the exciting light and emitting first color light, the second sectional region is used for receiving the exciting light and emitting second color light, the supplementary region is used for receiving the supplementary light and emitting the supplementary light, and the supplementary light and the first color light are in the same color system. The light source system has high light emitting efficiency.

Description

Color wheel, light source system and display device

Technical Field

The invention relates to a color wheel, a light source system and a display device.

Background

At present, laser sources are used more and more widely in the fields of display (such as projection) and illumination, and have the advantages of high energy density and small optical expansion, so that in the field of high-brightness light sources, the laser sources have gradually replaced bulbs and LED light sources. In the light source system, the first light source is adopted to excite the laser-receiving powder to generate the required light (for example, blue laser excites yellow laser-receiving powder to generate white light or light with a specific color), and the light source system becomes the mainstream of application by virtue of the advantages of high light efficiency, good stability, low cost and the like.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a light source system 100 in the prior art, and fig. 2 is a schematic structural diagram of a color wheel of the light source system 100 shown in fig. 1. The light source system 100 includes a blue laser light source 101, a red LED light source 102, a first dichroic filter 103, a second dichroic filter 104, a third dichroic filter 105, a color wheel 106, a reflector 107, and a light homogenizing rod 108. The color wheel 106 includes two segmented regions, a green fluorescent segment 1061 and a blue light-transmitting segment 1062, wherein the green fluorescent segment 1061 is divided into a first segment 1063 and a second segment 1064, and it is understood that the first segment 1063 and the second segment 1064 are divided for convenience of description, but in practice, there is no need to have an actual dividing notch between the first segment 1063 and the second segment 1064 on the color wheel 106.

When the light source system 100 works, the color wheel 106 rotates along the central axis thereof, so that the green fluorescent section 1061 and the blue light transmitting section 1062 of the color wheel 106 are periodically located on the light path where the blue laser emitted by the blue laser light source 101 is located, and the time (also referred to as a color wheel cycle) when the color wheel 106 rotates for one circle is divided into three time periods: t1, t2 and t 3.

the period t1 is a period in which the blue light-transmitting segment 1062 is located in the light path of the blue laser light in one rotation of the color wheel 106; in the period t1, the blue laser light source 101 is turned on, the red LED light source 102 is turned off, and the blue laser light transmits through the first light splitting filter 103, transmits through the blue light transmitting section 1062 of the color wheel 106, is reflected by the reflector 107, further transmits through the third light splitting filter 105, and further enters the dodging bar 108.

the period t2 is a period in which the first section 1063 of the green fluorescent section 1061 is located in the light path of the blue laser light in one rotation of the color wheel 106; in a period t2, the blue laser light source 101 is turned on, the red LED light source 102 is turned off, and the blue laser excites the green phosphor of the first section 1063 to generate green fluorescence. The first section 1063 reflects the green fluorescence back to the first dichroic filter 103, the first dichroic filter 103 reflects the green fluorescence, and the green fluorescence further reflects through the second dichroic filter 104 and the third dichroic filter 105, and then enters the light uniformizing bar 108.

the period t3 is a period in which the second section 1064 of the green fluorescent section 1061 is located in the optical path of the blue laser light during one rotation of the color wheel 106. In the period t3, the blue laser light source 101 is turned off and the red LED light source 102 is turned on. The red LED light transmits through the second dichroic filter 104, and is further reflected by the third dichroic filter 105, and then enters the light homogenizing rod 108. Here, two adjacent time periods of t1, t2, and t3 may not overlap and have no interval, and of course, there may be a little overlap or a little interval between the two adjacent time periods.

It can be understood that the light source system 100 may further include a plurality of relay lenses, which may be disposed between the blue laser light source 101 and the first light splitting filter 103, between the first light splitting filter 103 and the color wheel 106, between the first light splitting filter 103 and the second light splitting filter 104, between the reflector 107 and the third light splitting filter 105, between the second light splitting filter 104 and the third light splitting filter 105, and between the third light splitting filter 105 and the light homogenizing rod 108, for collecting, sorting, adjusting, etc. light beams, and specific positions, structures, and principles thereof are not described herein again.

According to the timing sequences of t1, t2, and t3, in the light source system 100, the second section 1064 of the color wheel 106 is idle and does not generate any light, so the light extraction efficiency of the whole light source system 100 is not high, and the overall brightness of the system is not sufficient.

Disclosure of Invention

In view of the above technical problems, it is desirable to provide a light source system and a display device that can improve the above problems.

A light source system comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting excitation light, the supplementary light source is used for emitting supplementary light, the color wheel comprises at least two segmentation areas and supplementary areas which are sequentially arranged along the circumferential direction, the at least two segmentation areas comprise a first segmentation area and a second segmentation area which are sequentially arranged along the circumferential direction, the supplementary areas are arranged on the inner side or the outer side of the first segmentation areas, the first segmentation areas are used for receiving the excitation light and emitting first color light, the second segmentation areas are used for receiving the excitation light and emitting second color light, the supplementary areas are used for receiving the supplementary light and emitting the supplementary light, and the supplementary light and the first color light are in the same color system.

A display device comprises a light source system, the light source system comprises an excitation light source, a supplement light source and a color wheel, the excitation light source is used for emitting excitation light, the supplement light source is used for emitting supplement light, the color wheel comprises at least two segmentation areas and a supplement area, the two segmentation areas are sequentially arranged along the circumferential direction, the two segmentation areas comprise a first segmentation area and a second segmentation area, the first segmentation area is arranged on the inner side or the outer side of the first segmentation area, the first segmentation area is used for receiving the excitation light and emitting first color light, the second segmentation area is used for receiving the excitation light and emitting second color light, the supplement area is used for receiving the supplement light and emitting the supplement light, and the supplement light and the first color light are in the same color system.

A color wheel comprising at least two segment regions and a complementary region sequentially arranged along a circumferential direction, the at least two segment regions comprising a first segment region and a second segment region sequentially arranged along the circumferential direction, the complementary region being arranged inside or outside the first segment region, the first segment region being configured to receive excitation light and emit first color light, the second segment region being configured to receive the excitation light and emit second color light, the complementary region being configured to receive complementary light and emit the complementary light, the complementary light and the first color light being of the same color system.

Compared with the prior art, in the light source system and the display device adopting the color wheel, the supplementary area is arranged at the inner side or the outer side of the first subsection area, each subsection area arranged along the circumferential direction and the supplementary area positioned at the inner side or the outer side of the subsection area can be fully utilized, and the light emitting efficiency and the overall brightness of the light source system and the display device adopting the color wheel are improved. Furthermore, the supplementary light emitted by the supplementary region and the first color light emitted by the first segment region are in the same color system, so that the first color light can be further supplemented, and the adverse phenomenon caused by the lack of the first color light can be improved.

Drawings

Fig. 1 is a schematic diagram of a prior art light source system.

Fig. 2 is a schematic structural diagram of a color wheel of the light source system shown in fig. 1.

Fig. 3 is a schematic structural diagram of a light source system according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a color wheel of the light source system shown in fig. 3.

Fig. 5 is a schematic diagram of an optical path of the light source system shown in fig. 3 during a first period.

Fig. 6 is a schematic diagram of an optical path of the light source system shown in fig. 3 in a second period.

Fig. 7 is a schematic diagram of an optical path of the light source system shown in fig. 3 in a third period.

Fig. 8 is a schematic optical path diagram of the light source system in the second embodiment of the present invention during the third period.

Fig. 9 is a schematic structural diagram of a light splitting and combining device of the light source system shown in fig. 8.

Fig. 10 is a schematic diagram of the optical paths of the excitation light and the supplement light of the light source system according to the second embodiment of the invention.

Fig. 11 is a schematic optical path diagram of a light source system in a third embodiment of the present invention during a third period.

Fig. 12 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a color wheel of the light source system shown in fig. 12.

Fig. 14 is a schematic optical path diagram of the light source system shown in fig. 12 in a third period.

Description of the main elements

Light source system

200, 300, 400, 500

Excitation light sources

201, 301, 401, 501

Supplemental light sources

202, 302, 502

Light splitting and combining

device

203, 303, 403, 503

Guiding means 204, 304, 404, 504

Color wheel

206, 306, 506

Light exit channel

207, 307, 407

Dodging

device

208, 308, 408

Relay lens 209

Focusing lens 210

Segmented

regions

206a, 506a

Supplemental regions

206b, 506b

Other regions

206c, 506c

First segmented region R

Second segmented region B

Third segment region G

First reflective element 204a

Second

reflective element

204b, 404b

Third

reflective element

204c, 404c

First region 303a

Second region 303b

Second dichroic filter 404d

First reflector 404e

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

Detailed Description

Referring to fig. 3, fig. 3 is a schematic structural diagram of a light source system 200 according to a first embodiment of the invention. The light source system 200 includes an excitation light source 201, a supplemental light source 202, a color wheel 206, a light splitting and combining device 203, a guiding device 204, and a light homogenizing device 208.

The excitation light source 201 is used for emitting excitation light, and the excitation light source 201 may be a semiconductor diode or a semiconductor diode array, and the semiconductor diode array may be a Laser Diode (LD) or the like. The excitation light may be blue light, violet light, ultraviolet light, or the like, but is not limited thereto. In this embodiment, the excitation light source 201 is a blue laser light source (e.g., a blue laser diode) for emitting blue laser light as the excitation light.

The supplemental light source 202 is used for emitting supplemental light, and the supplemental light source 202 may be a semiconductor diode or a semiconductor diode array, and the semiconductor diode array may be a Laser Diode (LD). The supplemental light source 202 may be a red laser light source (e.g., a red laser diode), and the supplemental light may be a red laser, but is not limited to a red laser, and in the present embodiment, the supplemental light is mainly described as a red laser, but it is understood that in a modified embodiment, the supplemental light may also be a green light, such as a green laser; or the supplementary light is yellow light, orange light, purple red light, etc. containing red light components.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a color wheel of the light source system 200 shown in fig. 3, wherein the color wheel 206 includes at least two segment regions 206a and a complementary region 206b sequentially arranged along a circumferential direction. Wherein the at least two segment regions 206a enclose a ring region, and each segment region 206a is a partial ring region.

In this embodiment, the at least two segment areas 206a include a first segment area R, a second segment area B, and a third segment area G sequentially arranged along the circumferential direction, wherein each segment area 206a is configured to emit light of one color, so that the three segment areas R, G, B can emit light of three colors (e.g., light of three colors, red, green, and blue). It is to be understood that, in the modified embodiment, the at least two segment regions 206a include two segment regions arranged in sequence along the circumferential direction, wherein each segment region 206a is used for emitting light of one color, so that the two segment regions can emit light of two colors (such as blue light and yellow light) together.

Further, in the present embodiment, the supplementary region 206b is disposed inside the first segment region R, the supplementary region 206b is also a partial annular region, the supplementary region 206b has the same center as the first segment region R, and preferably, the supplementary region 206b has the same central angle as the first segment region R. The color wheel 206 may further include another region 206c, the another region 206c and the complementary region 206b are disposed along the circumferential direction, and the another region 206c and the complementary region 206b enclose a circular ring region, it is understood that the another region 206c may be an empty region that does not emit light of each color, such as a region that does not receive the complementary light and the excitation light and does not emit light of each color and complementary light, and of course, in other modified embodiments, the another region 206c may be used to perform functions of filtering, diffusing, and the like, and the above is not limited thereto.

The first segmented region R is configured to receive the excitation light and emit a first color light, and a first fluorescent material, such as a red fluorescent material, may be disposed on the first segmented region R, and the first fluorescent material receives the excitation light emitted by the excitation light source 201 and generates the first color light (such as red light). The first segmented region R is a transmissive segmented region, that is, one side of the first segmented region R receives the excitation light emitted from the excitation light source 201, and the other side of the first segmented region R emits the first color light to the guiding device 204. However, it is understood that, in the modified embodiment, the first segment region R may be a reflective segment region, one side of the first segment region R may receive the excitation light emitted from the light splitting and combining device 203, and one side of the first segment region R may generate and emit the first color light.

The second segmented region B is configured to receive the excitation light and emit second color light, and specifically, the second segmented region B is provided with a scattering material and configured to scatter the excitation light and emit the scattered excitation light as the second color light. The second segmented region B is a transmissive segmented region, that is, one side of the second segmented region B receives the excitation light emitted from the excitation light source 201, and the other side of the second segmented region B emits the second color light to the guiding device 204. However, it is understood that, in the modified embodiment, the second segmented region B may be a reflective segmented region, for example, one side of the second segmented region B may receive the excitation light emitted by the combined light splitting and combining device, and one side of the second segmented region B may also emit the second color light.

The third segment region G receives the excitation light and emits a third color light, and is provided with a second fluorescent material, such as a green fluorescent material, which receives the excitation light and generates the third color light (such as green light). The third segment area G is a reflective segment area, that is, one side of the third segment area G receives the excitation light emitted from the excitation light source 201, and one side of the third segment area G also generates the third color light. However, it is understood that, in the modified embodiment, the third segment region may also be a transmissive segment region, for example, one side of the third segment region G may receive the excitation light emitted by the light splitting and combining device 203, and the other side of the third segment region G may also emit the third color light.

The supplemental region 206b is configured to receive the supplemental light and emit the supplemental light, which is in the same color family as the first color light, wherein the same color family may mean that the supplemental light overlaps with but is different from the first color light spectral range. Specifically, in this embodiment, the supplementary region 206b may be a transmission region for transmitting supplementary light emitted by the supplementary light source 202 to the guiding device. It is understood that the supplemental light and the first color light are in the same color system. In this embodiment, the complementary light and the first color light are in the same color system, the first color light is red light (e.g., red fluorescence), the second color light is blue light, the third color light is green light (e.g., green fluorescence), and the complementary light is red laser.

The light splitting and combining device 203 is located on a light path of the excitation light emitted by the excitation light source 201 and the supplement light emitted by the supplement light source 202, and the light splitting and combining device 203 guides the excitation light emitted by the excitation light source 201 and the supplement light emitted by the supplement light source 202 to the color wheel. In this embodiment, the excitation light source 201 and the complementary light source 202 are both located on the same side of the light splitting and combining device 203, and the light splitting and combining device 203 reflects the excitation light emitted from the excitation light source 201 and the complementary light emitted from the complementary light source 202 to the color wheel 206. Specifically, the light splitting and combining device 203 may be a first light splitting filter, and the first light splitting filter may reflect the first color light, the second color light, and the supplementary light, and transmit the third color light. Specifically, the light splitting and combining device 203 further receives a portion of the light emitted from the color wheel 206 (e.g., the light reflected by the color wheel 206: the third color light), and guides (e.g., transmits) a portion of the light emitted from the color wheel 206 (e.g., the third color light) to the light emitting channel 207. Further, the light splitting and combining device 203 also receives the light (such as the first color light, the second color light, and the supplementary light) guided by the guiding device 204 and guides (such as reflects) the light (such as the first color light, the second color light, and the supplementary light) guided by the guiding device 204 to the light-emitting channel 207.

The guiding device 204 is configured to receive another portion of light (e.g., transmitted light: the first color light, the second color light, and the supplemental light) emitted by the color wheel 206, and guide (e.g., reflect) the another portion of light (e.g., transmitted light: the first color light, the second color light, and the supplemental light) to a side of the light splitting and combining device 203 away from the excitation light source 201 and the supplemental light source 202, so that the light splitting and combining device 203 further guides (e.g., reflects) the another portion of light (e.g., transmitted light: the first color light, the second color light, and the supplemental light) to the light emitting channel 207.

The guiding device 204 includes at least one reflective element, which receives the light emitted from the color wheel 206 and reflects the light emitted from the color wheel to the light splitting and combining device. Further, the number of the at least one reflection element is at least two, and a relay lens 209 is disposed between two adjacent reflection elements and/or between the guiding device 204 and the light splitting and combining device 203.

In this embodiment, the guiding device 204 includes a first reflective element 204a, a second reflective element 204b, and a third reflective element 204c, the first reflective element 204a, the second reflective element 204b, and the third reflective element 204c are all mirrors, and the first reflective element 204a, the second reflective element 204b, and the third reflective element 204c reflect another part of the light (for example, transmitted light: the first color light, the second color light, and the supplemental light) emitted by the color wheel 206 to a side of the light splitting and combining device 203 away from the excitation light source 201 and the supplemental light source 202, so that the light splitting and combining device 203 further guides the another part of the light to the light emitting channel 207. Relay lenses 209 for adjusting light such as focusing and shaping may be disposed between the first reflective element 204a and the second reflective element 204b, between the second reflective element 204b and the third reflective element 204c, and between the third reflective element 204c and the light splitting and combining device 203. The first reflective element 204a, the second reflective element 204b, and the third reflective element 204c may all be mirrors.

The light uniformizing device 208 may be a light uniformizing square rod, which is disposed corresponding to the light emitting channel 207 and is configured to receive the light in the light emitting channel 207, so as to uniformize the light in the light emitting channel 207 and provide the homogenized light to an optical system (such as an optical system of a projection apparatus) for image display. It is understood that the light source system 200 may further include several focusing lenses 210, and the focusing lenses 210 may be disposed between the light splitting and combining device 203 and the color wheel 206, between the color wheel 206 and the guiding device 204, and between the light splitting and combining device 203 and the light homogenizing device 208, for performing adjustment such as focusing, shaping, and the like on light, for example, the light homogenizing device 208 receives the light in the light-emitting channel 207 via the focusing lenses 210.

When the light source system 200 operates, the color wheel 206 rotates around its central axis, so that each segment region B, R, G of the color wheel 206 is periodically located on the optical path of the excitation light emitted from the excitation light source 201, and the complementary region 206b is periodically located on the optical path of the complementary light emitted from the complementary light source 202. The time of one revolution of the color wheel 206 (also referred to as a color wheel cycle) is divided into three segments: in the first time period t1, the second time period t2, and the third time period t3, the optical path principle of the light source system 200 in the three time periods t1, t2, and t3 is described below with reference to fig. 5, fig. 6, and fig. 7.

The first time period t1 is a time period in which the second segment region B is located on the light path of the excitation light within one rotation of the color wheel 206; referring to fig. 5, in the first time period t1, the excitation light source 201 is turned on, the complementary light source 202 is turned off, the excitation light (e.g., blue laser light) emitted by the excitation light source is guided (reflected) by the light splitting and combining device 203 to the second segment region B of the color wheel, the second segment region B is a transmissive segment region, the scattering material on the second segment region B scatters the excitation light and uses the scattered excitation light as the second color light, and transmits the second color light to the guiding device 204, so that the three reflective elements of the guiding device 204 further guide (e.g., reflect) the second color light to a side of the light splitting and combining device 203 away from the excitation light source 201 and the complementary light source 202, so that the light splitting and combining device 203 guides the second color light to the light emitting channel 207, and enters the light unifying means 208. Thereby, in the first period t1, the light uniformizing device 208 of the light source system 200 emits the second color light (e.g., blue light).

The second period t2 is a period in which the third segment region G is located on the optical path of the excitation light within one rotation of the color wheel 206; referring to fig. 6, in the second time period t2, the excitation light source 201 is turned on, the supplemental light source 202 is turned off, the excitation light source 201 emits excitation light, the excitation light is guided (e.g., reflected) by the light splitting and combining device 203 to the third segment region G of the color wheel 206, the second fluorescent material (e.g., green fluorescent material) on the third segment region G is excited by the excitation light to generate the third color light (e.g., green light), the third segment region G is a reflective segment region, so the third segment region G further reflects the third reflected light to the light splitting and combining device 203, and the light splitting and combining device 203 further transmits the third color light to the light emitting channel 207 and enters the light homogenizing device 208. Thereby, in the second period t2, the dodging device 208 of the light source system 200 emits the third color light (e.g., green light).

The third period t3 is a period in which the first segment region R is located on the optical path of the excitation light within one rotation of the color wheel 206; referring to fig. 7, during the third time period t3, the excitation light source 201 is turned on, the supplemental light source 202 is also turned on, the excitation light source 201 emits excitation light, which is guided (e.g., reflected) by the light splitting and combining device 203 to one side of the first segment area of the color wheel, a first fluorescent material (e.g., red fluorescent material) on the first segmented region is excited by the excitation light to generate the first color light (e.g., red light), the first segmented region R is a transmissive segmented region, and the other side of the first segment region R emits the first color light to the guiding device 204, the reflecting element of the guiding device 204 reflects the first color light to the light splitting and combining device 203, the light splitting and combining device 203 further reflects the first color light to the light-emitting channel 207 and enters the light uniformizing device 208; meanwhile, the supplementary light emitted by the supplementary light source 202 is guided (e.g., reflected) by the light splitting and combining device 203 to one side of a supplementary area 206b of the color wheel 206, the supplementary area 206b transmits the supplementary light to the guiding device 204, the reflecting element of the guiding device 204 reflects the supplementary light to the light splitting and combining device 203, and the light splitting and combining device 203 further reflects the supplementary light to the light exit channel 207 and enters the light homogenizing device 208. Thus, in the third time period t3, the light uniformizing device 208 of the light source system 200 emits the first color light (red light, such as red fluorescent light) and the supplementary light (red light: such as red laser light).

Compared with the prior art, in the light source system 200 using the color wheel 206, the supplementary region 206b is disposed inside the first segment region R, and each segment region 206a disposed along the circumferential direction and the supplementary region 206b located inside or outside the first segment region R can be fully utilized, so as to improve the light extraction efficiency and the overall brightness of the light source system 200 using the color wheel 206. In detail, the excitation light source 201 is always in an on state in the color wheel period, and the color wheel 206 has no idle segment, so that the light source system 200 and the color wheel 206 of the present invention can improve the light emitting efficiency and brightness compared with the prior art.

Further, the complementary light emitted from the complementary region 206b and the first color light emitted from the first segment region R are in the same color system, so that the first color light can be further supplemented, and the disadvantage caused by the lack of the first color light can be improved. The supplementary region 206b and the first segment region R have the same central angle, so that the supplementary region 206b and the first segment region R can emit the supplementary light and the first color light at the same time, and the light efficiency is further improved.

The light splitting and combining device 203 not only guides the excitation light emitted by the excitation light source 201 and the complementary light emitted by the complementary light source 202 to the color wheel 206, one side of the light splitting and combining device 203 guides a part of the light emitted by the color wheel 206 to the light emitting channel 207, and the other side of the light splitting and combining device 203 also guides the other part of the light emitted by the color wheel 206 and guided by the guiding device 204 to the light emitting channel 207, so that the light emitted by the color wheel 206 can be combined and provided to the light emitting channel 207 by fewer light splitting and combining elements, and thus the light source system 200 has a reasonable light path design, compact elements and high light efficiency.

Referring to fig. 8 and 9, fig. 8 is a schematic optical path diagram of a light source system 300 according to a second embodiment of the present invention in a third time period, and fig. 9 is a schematic structural diagram of a light splitting and combining device 303 of the light source system 300 shown in fig. 8. The light source system 300 of the second embodiment is substantially the same as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 of the first embodiment can be substantially applied to the light source system 300 of the second embodiment, with the main difference: the structure of the light splitting and combining device 303, the structure of the color wheel 306, and the optical path of the light source system 300 in the third time period t3 are different.

Specifically, the light splitting and combining device 303 includes a first region 303a and a second region 303 b. The first region 303a may be disposed at the periphery of the second region 303b, specifically, the second region 303b may be located at the center of the first region 303a, the second region 303b may be a rectangular region, and the first region 303a may be a rectangular ring region. The first region 303a receives the excitation light emitted from the excitation light source 301 and guides the excitation light to the at least two segment regions (e.g., the first segment region, the second segment region, and the third segment region). Specifically, the first region 303a reflects the excitation light (e.g., blue light) and transmits the first color light (e.g., red light) emitted from the color wheel 306, and the first region 303a also transmits the third color light (e.g., green light) emitted from the color wheel 306. The second region 303b receives the supplemental light emitted by the supplemental light source 302 and guides the supplemental light to the supplemental region, and the second region 303b also receives the supplemental light emitted by the guiding device 304 and guides the supplemental light to the light-emitting channel 307. Specifically, the second region 303b reflects the supplementary light (e.g., the red laser light), the second region 303b also reflects the second color light, and the second color light guided to the second region 303b by the guiding device 304 is reflected to the light-emitting channel 307 by the second region 303 b.

Referring to fig. 4, the color wheel 306 has a substantially same structure as the color wheel 206 of the first embodiment, and the main difference between the two is that the first segment region of the color wheel 306 is a reflective segment region, specifically, one side of the first segment region receives the excitation light emitted by the light splitting and combining device, and one side of the first segment region further reflects the generated first color light to the light splitting and combining device 303, and the light splitting and combining device 303 further guides the first color light to the light emitting channel 307.

Further, based on the above-described structures of the light splitting and combining device 304 and the color wheel 306, in a third time period t3, the excitation light source 301 and the supplementary light source 302 are both turned on, the laser light source 301 emits excitation light to the first region 303a, the first region 303a guides (e.g., reflects) the excitation light to the first segment region of the color wheel 306, the first fluorescent material of the first segment region excites and generates the first color light (e.g., red light: red fluorescent light), the first color light is further reflected by the first segment region to the second region 303b of the light splitting and combining device 303, and the second region 303b guides (e.g., transmits) the first color light to the light emitting channel 307; further, the supplemental light emitted by the supplemental light source 302 is guided (e.g., reflected) by the second region 303b to a supplemental region of the color wheel 306, the supplemental region of the color wheel 306 transmits the supplemental light to the guiding device 304, the guiding device 304 guides (e.g., reflects) the supplemental light to a side of the second region 303b of the light splitting and combining device 303 away from the supplemental light source 302, and the second region 303b also guides (e.g., reflects) the supplemental light guided by the guiding device 304 to the light exit channel 307.

In the second embodiment, the first segment region is a reflective segment region for receiving the excitation light and generating the first color light, and the light splitting and combining device 303 may be a regional light splitting filter, and similarly, each segment region arranged along the circumferential direction and a supplementary region located inside or outside the segment region may be utilized to improve the light emitting efficiency and the overall brightness of the light source system and the display device using the color wheel. Further, the excitation light source 301 is always on in the color wheel period, and the color wheel 306 does not have a free segment, so that the light source system 300 and the color wheel 306 can improve the light emitting efficiency and brightness compared with the prior art.

Furthermore, the supplementary light emitted by the supplementary region and the first color light emitted by the first segment region are in the same color system, so that the first color light can be further supplemented, and the adverse phenomenon caused by the lack of the first color light can be improved. The supplementary region and the first segment region have the same central angle, so that the supplementary region and the first segment region can emit supplementary light and the first color light at the same time, and the lighting effect is further improved.

The light splitting and combining device 303 not only guides the excitation light emitted by the excitation light source and the complementary light emitted by the complementary light source to the color wheel 306, one side of the light splitting and combining device 303 guides a part of the light emitted by the color wheel 306 to the light emitting channel 307, but also guides the other side of the light splitting and combining device 303, which is emitted by the color wheel 306 and guided by the guiding device 304, to the light emitting channel 307, so that the light emitted by the color wheel 306 can be combined and provided to the light emitting channel by fewer light splitting and combining elements, and thus the light source system 300 has a reasonable light path design, compact elements and high light efficiency.

Further, referring to fig. 10, fig. 10 is a schematic diagram illustrating a principle of an optical path of the excitation light and the complementary light of the light source system 300 according to the second embodiment of the invention. In the second embodiment, because the positions of the supplemental light and the excitation light incident on the color wheel 306 are different, the optical axes of the supplemental light and the second color light emitted from the color wheel 306 do not coincide, which may cause the optical axes of the supplemental light and the second color light to not coincide when the light beams of the supplemental light and the second color light enter the light uniformizing device 308 of the light emitting channel 307, which may cause the phenomena of unclear imaging or wasted light energy of the optical engine system in the subsequent light path, and in order to improve the unfavorable phenomena caused by the misalignment of the optical axes of the supplemental light and the second color light, the present invention further provides the light source system 400 of the third embodiment.

Referring to fig. 11, fig. 11 is a schematic optical path diagram of a light source system 400 in a third time period according to a third embodiment of the present invention. The light source system 400 of the third embodiment is substantially the same as the light source system 300 of the second embodiment, that is, the above description of the light source system 300 of the second embodiment can be substantially applied to the light source system 400 of the third embodiment, and the main difference therebetween is that: the specific elements of the guide 404 vary. Specifically, the guiding device 404 includes a first reflecting mirror 404e and a second dichroic filter 404d, which replace the first reflecting element in the second embodiment compared to the second embodiment. The second dichroic filter 404d receives the second color light emitted from the second segment region and reflects the second color light, the first reflector 404e receives the complementary light emitted from the complementary region and reflects the complementary light, and the second color light reflected by the second dichroic filter 404d coincides with the optical axis of the complementary light reflected by the first reflector 404 e. Specifically, the second dichroic filter 404d reflects the second color light and transmits the supplemental light, the first reflector 404e receives the supplemental light emitted from the supplemental region through the second dichroic filter 404d, and the supplemental light reflected by the first reflector 404e is further transmitted by the second dichroic filter 404 d. The second reflective element 404b and the third reflective element 404c sequentially receive the supplement light transmitted by the second dichroic filter 404d and the second color light reflected by the second dichroic filter 404d, and guide (e.g., reflect) the supplement light and the second color light to the light splitting and combining device 403, so that the light splitting and combining device 403 guides the supplement light and the second color light to the light emitting channel 407.

In the third embodiment, the optical axes of the supplementary light and the second color light can be adjusted to coincide through the first reflector 404e and the second dichroic filter 404d, and then the optical axes of the supplementary light and the second color light can coincide when entering the light uniformizing device 408 of the light emitting channel 407, so that the phenomenon of unclear imaging or light energy waste of an optical machine system in a subsequent light path is improved.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a light source system 500 according to a fourth embodiment of the present invention. The light source system 500 of the fourth embodiment is substantially the same as the light source system 200 of the first embodiment, that is, the above description of the light source system 200 of the first embodiment can be substantially applied to the light source system 500 of the fourth embodiment, and the main difference therebetween is that: the structure of the color wheel 506, the position of the fill light source 502, and the light path in the third period are different.

Referring to fig. 13, fig. 13 is a schematic structural diagram of the color wheel 506 of the light source system 500 shown in fig. 12. The main difference between the color wheel 506 and the color wheel 206 of the first embodiment is: the supplementary region 506b and other regions 506c of the color wheel 506 are located outside the segment region 506 a. Specifically, the supplementary region 506b may be located outside the first segment region R, and the supplementary region 506b has the same central angle as the first segment region R. The other region 506c is located outside the second and third divisional regions G and B.

Compared to the first embodiment in which the light supplement light source is located below the excitation light source, in the present embodiment, the light supplement light source 502 may be located above the excitation light source 501, please refer to fig. 14, in a third time period, the light supplement light source 502 is configured to emit supplement light toward the supplement area 506b located outside through the light splitting and combining device 503, and the supplement area 506b located outside further guides the supplement light to the guiding device 504.

It is understood that the supplementary region 506b of the color wheel 506 is located outside the segment region 506a, and the same technical effects as those of the first embodiment can be achieved, and will not be described herein again.

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 system that employs the

light source devices

200, 300, 400, and 500 in 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 used for modulating an image according to the light emitted by the light source system and input image data to output image light, and the projection lens is used for projecting according to the image light to display a projected image. The

light source devices

200, 300, 400, and 500 in the above embodiments and the light source devices in the modified embodiments have high light utilization efficiency and good color uniformity of images.

It is to be understood that the

light source devices

200, 300, 400, and 500 and the light source devices according to the modified embodiments thereof according to the above embodiments of the present invention may be used in a stage light system, a vehicle lighting system, an operation lighting system, and the like, and are not limited to the above-described display devices.

Claims

1. A light source system, characterized by: the light source system comprises an excitation light source, a supplementary light source and a color wheel, wherein the excitation light source is used for emitting excitation light, the supplementary light source is used for emitting supplementary light, the color wheel comprises at least two segmentation areas which are sequentially arranged along the circumferential direction, and the at least two segmentation areas comprise a first segmentation area and a second segmentation area which are sequentially arranged along the circumferential direction; the color wheel further comprises a supplementary region, the supplementary region is arranged on the inner side or the outer side of the first sectional region, the first sectional region is used for receiving the exciting light and emitting first color light, the second sectional region is used for receiving the exciting light and emitting second color light, the supplementary region is used for receiving the supplementary light and emitting the supplementary light, and the supplementary light and the first color light are in the same color system;

the light source system comprises a guiding device, the guiding device comprises a first reflector and a second light splitting filter, the second light splitting filter receives the second color light emitted by the second segmented area and reflects the second color light, the first reflector receives the supplementary light emitted by the supplementary area and reflects the supplementary light, and the second color light reflected by the second light splitting filter is superposed with the optical axis of the supplementary light reflected by the first reflector.

2. The light source system of claim 1, wherein: the supplementary region has the same central angle as the first segment region.

3. The light source system of claim 1, wherein: the color wheel also comprises other areas, the other areas and the supplementary areas are arranged along the circumferential direction, and the other areas and the supplementary areas form a circular ring area.

4. The light source system of claim 1, wherein: the light source system comprises a light splitting and combining device, the light splitting and combining device is positioned on a light path of exciting light emitted by the excitation light source and supplementary light emitted by the supplementary light source, the light splitting and combining device respectively guides the exciting light emitted by the excitation light source and the supplementary light emitted by the supplementary light source to at least two segment areas and supplementary areas of the color wheel, second color light emitted by the second segment area is further guided to one side of the light splitting and combining device, which is far away from the excitation light source, through the guiding device, and the light splitting and combining device further guides the second color light emitted by the guiding device to a light emitting channel; the first color light emitted by the first segment area is provided to the light-emitting channel through the light-splitting and light-combining device or provided to the light-emitting channel through the guiding device and the light-splitting and light-combining device; the supplementary light emitted by the supplementary area is provided to the light-emitting channel through the guiding device and the light splitting and combining device.

5. The light source system of claim 4, wherein: one side of the first segmented area receives the excitation light emitted by the light splitting and combining device, the other side of the first segmented area emits the first color light to the guide device, the guide device guides the first color light emitted by the first segmented area to one side of the light splitting and combining device, which is far away from the excitation light source, and the light splitting and combining device guides the first color light emitted by the guide device to the light emitting channel.

6. The light source system of claim 4, wherein: one side of the first sectional area receives the excitation light emitted by the light splitting and combining device, and one side of the first sectional area further reflects the generated first color light to the light splitting and combining device, and the light splitting and combining device further guides the first color light to the light emitting channel.

7. The light source system of claim 6, wherein: the light splitting and combining device comprises a first area and a second area, the first area receives the excitation light emitted by the excitation light source and guides the excitation light to the at least two segment areas, the second area receives the supplement light emitted by the supplement light source and guides the supplement light to the supplement area, and the second area also receives the supplement light emitted by the guide device and guides the supplement light to the light emitting channel.

8. The light source system of claim 4, wherein: one side of the supplement area receives the supplement light emitted by the light splitting and combining device, the other side of the supplement area also provides the supplement light to the guide device, the guide device guides the supplement light emitted by the supplement area to one side of the light splitting and combining device, which is far away from the excitation light source, and the light splitting and combining device guides the supplement light emitted by the guide device to the light emitting channel.

9. The light source system of claim 4, wherein: the at least two segment regions further include a third segment region, the first segment region, the second segment region and the third segment region are connected in a circumferential direction to form a circular ring region, the third segment region receives the excitation light and emits a third color light, the third color light is provided to the light splitting and combining device, and the light splitting and combining device further guides the third color light to the light emitting channel.

10. The light source system of claim 9, wherein:

in a first period, the excitation light source emits excitation light, the excitation light is guided to a second segment area of the color wheel by the light splitting and combining device, the second segment area emits the second color light, the second color light is guided to the light splitting and combining device by the guiding device, and the light splitting and combining device emits the second color light to the light emitting channel;

in a second time interval, the excitation light source emits excitation light, the excitation light is guided to a third subsection area of the color wheel by the light splitting and combining device, the third subsection area emits the third color light to the light splitting and combining device, and the light splitting and combining device emits the third color light to the light emitting channel;

in a third time period, the excitation light source emits the excitation light, the excitation light is guided to a first segment region of the color wheel by the light splitting and combining device, the first color light emitted by the first segment region is provided to the light emitting channel through the light splitting and combining device or provided to the light emitting channel through the guiding device and the light splitting and combining device, the supplement light source further emits the supplement light, the supplement light is guided to the supplement region by the light splitting and combining device, the supplement light emitted by the supplement region is guided to one side of the light splitting and combining device, which is far away from the excitation light source, through the guiding device, and the light splitting and combining device guides the supplement light emitted by the guiding device to the light emitting channel.

11. The light source system of claim 9, wherein: the light splitting and combining device is a first light splitting filter, the first light splitting filter receives excitation light emitted by the excitation light source and supplement light emitted by the supplement light source and reflects the excitation light and the supplement light to the color wheel, the first light splitting filter also reflects second color light and the supplement light emitted by the guide device to the light emitting channel, and the first color light emitted by the first subsection area is transmitted to the light emitting channel through the first light splitting filter or provided to the first light splitting filter through the guide device and reflected to the light emitting channel through the first light splitting filter; one side of the third subsection area generates the third color light and reflects the third color light to the first light splitting filter, and the first light splitting filter also transmits the third color light to the light outlet channel.

12. The light source system of claim 9, wherein: the second segmented area is provided with a scattering material and is used for scattering the exciting light and emitting the scattered exciting light as the second color light; the first segmented area is provided with a first fluorescent material, and the first fluorescent material receives the exciting light and generates first color light; the third segmented area is provided with a second fluorescent material, and the second fluorescent material receives the exciting light and generates third color light.

13. The light source system of claim 9, wherein: the first color light is red light, the second color light is blue light, and the third color light is green light.

14. The light source system of claim 13, wherein: the excitation light source is a blue laser light source, and the supplementary light source is a red laser light source.

15. The light source system of claim 4, wherein: the guiding device comprises at least one reflecting element, and the at least one reflecting element receives the second color light emitted by the second sectional area and/or the first color light emitted by the first sectional area and the supplementary light emitted by the supplementary area and reflects the supplementary light to the light splitting and combining device.

16. The light source system of claim 1, wherein: the first reflector receives the supplement light emitted by the supplement area through the second light splitting filter.

17. A display device comprising a light source system, characterized in that: the light source system adopts the light source system of any one of claims 1 to 16.