Light source system and projection device

Abstract

The light source system comprises a first light source, a second light source, a third light source, a wavelength conversion layer and a first condensing lens, the first light source is used for emitting first exciting light, the second light source is used for emitting second exciting light, and the third light source is used for emitting third exciting light; the first light source is arranged on one side of the wavelength conversion layer, and the second light source and the third light source are arranged on the other side of the wavelength conversion layer; the first condensing lens is arranged among the second light source, the third light source and the wavelength conversion layer, when the second exciting light and the third exciting light are incident to the first condensing lens, the optical axes of the second exciting light and the third exciting light are parallel to the main optical axis of the first condensing lens, and the optical axes of the second exciting light and the third exciting light are parallel to the main optical axis of the second condensing lens. And the second exciting light is incident from the non-central position of the first condensing lens and refracted to the wavelength conversion layer, so that light spots of the second exciting light and the third exciting light on the wavelength conversion layer are at least partially overlapped.

Description

Technical Field

[0001] This invention relates to the field of projection device technology, and in particular to a light source system and a projection device. Background Technology

[0002] In existing technologies, in the field of fixed light source technology, increasing the number of light sources is usually used to improve brightness, thereby increasing the overall output brightness. However, this cannot meet the requirement of increasing brightness per unit area. Later, with the development of technology, double-sided excitation was used to improve the brightness of the light source (such as Chinese patent application: 201110086731.9), in which a set of excitation light sources are set on both sides of the phosphor layer. This technical solution does improve the output brightness per unit area, but how to further improve the brightness has become a bottleneck technology for projection light sources. If the output brightness is increased by increasing the number of solid-state light sources, the received brightness of the spatial light modulator remains unchanged because the area of ​​the spatial light modulator is limited, that is, the brightness per unit area is not improved.

[0003] Therefore, how to improve the brightness per unit area has become a bottleneck problem that fixed light sources urgently need to solve. Summary of the Invention

[0004] To address the problem that the brightness per unit area in existing fixed light source systems cannot be further improved, this invention provides a light source system and projection device. This invention effectively solves the problem that the brightness per unit area in fixed light source systems cannot be improved by increasing the energy of the excitation light per unit area of ​​the wavelength conversion layer, thereby increasing the brightness per unit area and improving the brightness of the light source system.

[0005] In a first aspect, the present invention provides a light source system, comprising a first light source, a second light source, a third light source, a wavelength conversion layer, and a first condenser lens. The first light source is used to emit a first excitation light, the second light source is used to emit a second excitation light, and the third light source is used to emit a third excitation light. The first light source is disposed on one side of the wavelength conversion layer, and the second and third light sources are disposed on the other side of the wavelength conversion layer. The first condenser lens is disposed between the second and third light sources and the wavelength conversion layer. When the second and third excitation lights are incident on the first condenser lens, the optical axes of the second and third excitation lights are parallel to the principal optical axis of the first condenser lens, respectively, and are incident from a non-central position of the first condenser lens. The first condenser lens refracts the second and third excitation lights onto the wavelength conversion layer, such that the light spot of the second excitation light on the wavelength conversion layer at least partially overlaps with the light spot of the third excitation light on the wavelength conversion layer.

[0006] Secondly, the present invention provides a projection device, including the light source system described above.

[0007] Compared with existing technologies, the present invention has the following beneficial effects: The light source system and projection device are configured with a first light source, a second light source, a third light source, a wavelength conversion layer, and a first condenser lens. The first light source emits a first excitation light, the second light source emits a second excitation light, and the third light source emits a third excitation light. The first light source is disposed on one side of the wavelength conversion layer, and the second and third light sources are disposed on the other side. The first condenser lens is disposed between the second and third light sources and the wavelength conversion layer. When the second and third excitation lights are incident on the first condenser lens, their optical axes are parallel to the principal optical axis of the first condenser lens and incident from a non-central position. The first condenser lens refracts the second and third excitation lights onto the wavelength conversion layer, such that the light spot of the second excitation light on the wavelength conversion layer at least partially overlaps with the light spot of the third excitation light on the wavelength conversion layer. This allows the light source system and projection device to solve the problem of insufficient brightness per unit area in fixed light source systems, increases the energy of the excitation light per unit area of ​​the wavelength conversion layer, thereby increasing the brightness per unit area and improving the brightness of the light source system. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the light source system according to the first embodiment of the present invention.

[0010] Figure 2 This is a schematic diagram of the light spot on the first focusing lens of the present invention.

[0011] Figure 3 This is a schematic diagram of the light source system according to the second embodiment of the present invention.

[0012] Figure 4 for Figure 3 A schematic diagram of the light spot on the wavelength conversion layer.

[0013] Figure 5 This is a schematic diagram of the light source system according to the third embodiment of the present invention.

[0014] Figure 6This is a schematic diagram of the light source system according to the fourth embodiment of the present invention.

[0015] Figure 7 This is a schematic diagram of the light source system according to the fifth embodiment of the present invention.

[0016] Figure 8 This is a schematic diagram of the light source system according to the sixth embodiment of the present invention.

[0017] Figure 9 This is a schematic diagram of the light source system according to the seventh embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] Please see Figure 1 , Figure 1This is a schematic diagram of a light source system according to a first embodiment of the present invention. The light source system 1 includes a first light source 101, a second light source 102, a third light source 103, a wavelength conversion layer 104, and a first condensing lens 105. The first light source 101 is used to emit a first excitation light, the second light source 102 is used to emit a second excitation light, and the third light source 103 is used to emit a third excitation light. The first light source 101 is disposed on one side of the wavelength conversion layer 104, and the second light source 102 and the third light source 103 are disposed on the other side of the wavelength conversion layer 104. The first condensing lens 105 is disposed on the second light source 103. Between light source 102, the third light source 103, and the wavelength conversion layer 104, when the second excitation light and the third excitation light are incident on the first condenser lens 105, the optical axes of the second excitation light and the third excitation light are parallel to the principal optical axis of the first condenser lens 105, and they are incident from a non-central position of the first condenser lens 105. The first condenser lens 105 refracts the second excitation light and the third excitation light onto the wavelength conversion layer 104, such that the light spot of the second excitation light on the wavelength conversion layer at least partially coincides with the light spot of the third excitation light on the wavelength conversion layer. Through the refraction of light by the first condenser lens 105, both the second excitation light and the third excitation light are refracted towards the centerline position of the first condenser lens 105, and finally, the light spot of the second excitation light on the wavelength conversion layer 104 at least partially coincides with the light spot of the third excitation light on the wavelength conversion layer 104. In this design, the positions of the second and third excitation beams incident on the first condenser lens 105 are cleverly positioned so that the light spots of the second and third excitation beams on the wavelength conversion layer at least partially overlap. By increasing the light energy of the excitation beam per unit area of ​​the wavelength conversion layer, the light energy of the emitted light per unit area of ​​the wavelength conversion layer is increased. This, in turn, increases the brightness per unit area, which not only improves the brightness of the light source system but also increases the amount of light available to subsequent optical systems.

[0021] It is worth noting that in this embodiment, the excitation light source module on the other side of the wavelength conversion layer 104 can include three, four, or even five. The number is not limited; that is, the light source system can include multiple light source components located on the other side of the wavelength conversion layer. The light spot emitted by each light source component is uniformly distributed at a non-central position of the first condenser lens. When there are three excitation light source modules, two of them are incident from opposite sides of the first condenser lens 105, and the optical axis of the excitation light from the other excitation light module is approximately coincident with the center line (i.e., the principal optical axis) of the first condenser lens 105. When there are four excitation light source modules, they can be arranged opposite each other in pairs or side-by-side in pairs. Specific implementation details will be provided in subsequent embodiments.

[0022] Please see Figure 2 , Figure 2 This is a schematic diagram of the light spot on the first condenser lens of the present invention. The excitation light source module can have four light sources, meaning the light source system also includes a fourth and a fifth light source. The second and third light sources are arranged opposite each other, and the fourth and fifth light sources are also arranged opposite each other, or they can be arranged in pairs as needed. The light spot 106 formed by the second light source on the first condenser lens 105 and the light spot 107 formed by the third light source on the first condenser lens 105 are relatively distributed at the edge of the first condenser lens 105, i.e., at a non-central position. The fourth and fifth light sources respectively form light spots 108 and 109 on the first condenser lens 105, which are relatively distributed at the edge of the first condenser lens 105, i.e., at a non-central position. This arrangement ensures that the light spots ultimately formed on the wavelength conversion layer at least partially overlap.

[0023] In this embodiment, the curvature of the first condenser lens 105 is less than or equal to 80 mm. This curvature allows the second and third excitation lights to be better refracted to the center of the wavelength conversion layer 104, thereby increasing the overlap rate. In addition, by setting this curvature, the overall volume of the light source is made smaller.

[0024] The distance between the first condenser lens 105 and the wavelength conversion layer 104 is less than or equal to the focal length of the first condenser lens 105. This arrangement reduces the optical path length of the second and third excitation lights, thereby reducing light loss, and also makes the overall size of the light source more compact. This enables small-volume illumination.

[0025] In this embodiment, the second excitation light and the third excitation light are incident as close as possible to the edge of the first condenser lens. This can better achieve the refraction of each excitation light in the first condenser lens, thereby improving the overlap between the light spots of the second excitation light and the third excitation light on the wavelength conversion layer 104.

[0026] Furthermore, the first light source 101, the second light source 102, and the third light source 103 are all solid-state light-emitting chips, and the number of solid-state light-emitting chips in the second light source 102 and the third light source 103 is less than or equal to the number of solid-state light-emitting chips in the first light source 101. This ensures that the second excitation light emitted by the second light source 102 and the third excitation light emitted by the third light source 103 have sufficiently small light spots on the wavelength conversion layer 104, and that the light divergence angle is also small. This guarantees a high energy density of excited light per unit area and a small divergence angle of the emitted light, allowing it to be fully utilized in subsequent optical paths, thus truly achieving high-brightness emitted light. In the prior art, the large divergence angle of the light spot prevents the large-angle light from being utilized in subsequent optical paths, resulting in low final projection brightness. The small emitted light spot of this application truly solves this problem. The second light source 102 and the third light source 103 can be light of the same color or wavelength, or they can be light of different colors.

[0027] Please see Figure 3 , Figure 3 This is a schematic diagram of the light source system according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the light source system 2 adds a first dichroic element 210, a first shaping device 211, and a second shaping device 212.

[0028] The first shaping device 211 is used to shape the second excitation light, and the second shaping device 212 is used to shape the third excitation light, so that the spot shape of the second excitation light on the wavelength conversion layer 204 is the same as or similar to the spot shape of the third excitation light on the wavelength conversion layer 204. This improves the overlap rate of the spots of the second and third excitation lights. Simultaneously, by shaping the spots of the second and third excitation lights using the first and second shaping devices 211 and 212, the spots of the second and third excitation lights falling on the wavelength conversion layer 204 are not only similar in shape and have a high overlap rate, but also essentially cover the wavelength conversion layer 204. This technical solution, through the first and second shaping devices 211 and 212 in conjunction with the first condenser lens 205, can achieve not only maximum overlap of the spots of the second and third excitation lights, but also maximum complete coverage of the wavelength conversion layer 204, ultimately resulting in high brightness and uniformity of the emitted light, reducing the need for subsequent optical components. In this invention, the first shaping device 211 and the second shaping device 212 include one or more combinations of lens groups, lenses, square rods, or compound eye lenses.

[0029] The following embodiments use lenses as examples in the description.

[0030] The light source system 2 includes a first light source 201, a second light source 202, a third light source 203, a wavelength conversion layer 204, and a first condensing lens 205. The first light source 201 emits a first excitation light, the second light source 202 emits a second excitation light, and the third light source 203 emits a third excitation light. The first light source 201 is disposed on one side of the wavelength conversion layer 204, and the second light source 202 and the third light source 203 are disposed on the other side of the wavelength conversion layer 204. The first condensing lens 205 is disposed on the second light source 202 and the third light source 203. Between the wavelength conversion layer 203 and the wavelength conversion layer 204, when the second excitation light and the third excitation light are incident on the first condenser lens 205, the optical axes of the second excitation light and the third excitation light are parallel to the principal optical axis of the first condenser lens 205, and they are incident from a non-central position of the first condenser lens 205. The first condenser lens 205 refracts the second excitation light and the third excitation light onto the wavelength conversion layer 205, such that the light spot of the second excitation light on the wavelength conversion layer 204 and the light spot of the third excitation light on the wavelength conversion layer 205 at least partially coincide. Through the refraction of light by the first condenser lens 205, the second excitation light and the third excitation light are both refracted towards the centerline position of the first condenser lens 205, and finally the light spot of the second excitation light on the wavelength conversion layer 204 and the light spot of the third excitation light on the wavelength conversion layer 204 at least partially coincide. The light source system 2 also includes a first dichroic element 210, which is used to guide the second excitation light and the third excitation light to the first condenser lens 205. The first dichroic element can also be used to guide the first excitation light, the second excitation light, and the third excitation light to excite the laser emission generated by the wavelength conversion layer.

[0031] Furthermore, the first dichroic element 210 includes a first portion 2101 and a second portion 2102, the second light source 202 and the third light source 203 are disposed opposite to each other, the first portion 2101 is used to guide the second excitation light to the first condenser lens 205, and the second portion 2102 is used to guide the third excitation light to the first condenser lens 205.

[0032] Furthermore, the system includes a first shaping device 211 and a second shaping device 212, both of which can be lenses. The first shaping device 212 focuses the second excitation light onto a non-central position of the first condenser lens 205. Through the converging effect of the first condenser lens 205, the center of the light spot of the second excitation light is positioned approximately at the center of the wavelength conversion layer 204. The second shaping device 212 focuses the third excitation light onto a non-central position of the first condenser lens 205. Through the converging effect of the first condenser lens 205, the center of the light spot of the third excitation light is positioned approximately at the center of the wavelength conversion layer 204. The first shaping device 211 is disposed between the second light source 202 and the first dichroic element 210, and the second shaping device 212 is disposed between the third light source 203 and the first dichroic element 210.

[0033] Please see Figure 4 , Figure 4 for Figure 3 A schematic diagram of the light spots on the wavelength conversion layer. The light spot 213 of the second excitation light emitted from the second light source 202 falling on the wavelength conversion layer 204, and the light spot 214 of the third excitation light emitted from the third light source 203 falling on the wavelength conversion layer 204, wherein light spots 213 and 214 overlap as much as possible. The overlap rate between the light spot 213 of the second excitation light on the wavelength conversion layer and the light spot 214 of the third excitation light on the wavelength conversion layer is above 80%, and the overlap rate can also reach above 98%. This can achieve better uniformity of the emitted light on the one hand, and a high energy density per unit area of ​​the emitted light on the other hand.

[0034] Please see Figure 5 , Figure 5 This is a schematic diagram of the light source system according to the third embodiment of the present invention. The difference between the third embodiment and the second embodiment is that the first dichroic element 310 is a single unit, and the second light source 302 and the third light source 303 are arranged side by side on one side of the first dichroic element 310.

[0035] The light source system 3 includes a first light source 301, a second light source 302, a third light source 303, a wavelength conversion layer 304, and a first condensing lens 305. The first light source 301 emits a first excitation light, the second light source 302 emits a second excitation light, and the third light source 303 emits a third excitation light. The first light source 301 is disposed on one side of the wavelength conversion layer 304, and the second light source 302 and the third light source 303 are disposed on the other side of the wavelength conversion layer 304. The first condensing lens 305 is disposed between the second light source 302 and the third light source 303. Between the wavelength conversion layer 303 and the wavelength conversion layer 304, when the second excitation light and the third excitation light are incident on the first condenser lens 305, the optical axes of the second excitation light and the third excitation light are parallel to the principal optical axis of the first condenser lens 305, and they are incident from a non-central position of the first condenser lens 305. The first condenser lens 305 refracts the second excitation light and the third excitation light onto the wavelength conversion layer 304, such that the light spot of the second excitation light on the wavelength conversion layer 304 at least partially coincides with the light spot of the third excitation light on the wavelength conversion layer 304. Through the refraction of light by the first condenser lens 305, both the second excitation light and the third excitation light are refracted towards the centerline position of the first condenser lens 305, and finally the light spot of the second excitation light on the wavelength conversion layer 304 at least partially coincides with the light spot of the third excitation light on the wavelength conversion layer 304. The light source system 3 also includes a first dichroic element 310, which is used to guide the second excitation light and the third excitation light to the first condenser lens 305. The first dichroic element 310 can also be used to guide the first excitation light, the second excitation light, and the third excitation light to excite the laser emitted by the wavelength conversion layer. The first dichroic element 310 is a single unit, and the second light source 302 and the third light source 303 are arranged side by side on one side of the first dichroic element 310.

[0036] The light source system 3 also includes a first shaping device 311 and a second shaping device 312, both of which can be lenses. The first shaping device 311 is used to focus the second excitation light onto a non-central position of the first condenser lens 305. Through the converging of the first condenser lens 305, the center of the light spot of the second excitation light is located approximately at the center of the wavelength conversion layer 304. The second shaping device 311 is used to focus the third excitation light onto a non-central position of the first condenser lens 305. Through the converging of the first condenser lens 305, the center of the light spot of the third excitation light is located approximately at the center of the wavelength conversion layer 304. The first shaping device 311 is disposed between the second light source 302 and the first dichroic element 310, and the second shaping device 312 is disposed between the third light source 303 and the first dichroic element 310.

[0037] Please see Figure 6 , Figure 6 This is a schematic diagram of the light source system according to the fourth embodiment of the present invention. The main difference between the fourth embodiment and the third embodiment is that the first light source 401 includes two sets of light sources.

[0038] The first light source 401 in the light source system 4 includes two sets of light sources, namely light source 4011 and light source 4012. The excitation light emitted by light sources 4011 and 4012 is focused onto the off-center position of the second condenser lens 417 by the third shaping lens 415 and the fourth shaping lens 416 respectively. A second dichroic element 418 is disposed between the first light source and the wavelength conversion layer. The second dichroic element 418 and the wavelength conversion layer are independently disposed and used to guide the excitation light to the wavelength conversion layer. By providing two sets of light sources, the brightness of the emitted light per unit area can be further improved compared with other embodiments.

[0039] Please see Figure 7 , Figure 7 This is a schematic diagram of a light source system according to the fifth embodiment of the present invention. The main difference between the fifth embodiment and the fourth embodiment is that the second dichroic element 518 is used to carry the wavelength conversion layer.

[0040] The first light source 501 in the light source system 5 includes two sets of light sources, namely light source 5011 and light source 5012. The excitation light emitted by light source 5011 and light source 5012 is guided to the non-central position of the second condenser lens 517 through the third dichroic element 519. A second dichroic element 518 is disposed between the first light source and the wavelength conversion layer. The second dichroic element 518 is used to carry the wavelength conversion layer and to guide the excitation light to the wavelength conversion layer.

[0041] It is worth noting that the wavelength conversion layer and the first light source in this invention can be configured as needed. The wavelength conversion layer can be configured on top of the first light source, which solves the heat dissipation problem of the wavelength conversion layer, or it can be configured separately from the first light source.

[0042] Please see Figure 8 , Figure 8 This is a schematic diagram of the light source system according to the sixth embodiment of the present invention. The main difference between the fifth and second embodiments is that the second light source 602 and the third light source 603 each include two light sources.

[0043] The light source system 6 includes a second light source 602 and a third light source 603. The second light source 602 comprises two light sources, 6021 and 6022, with different wavelengths; one emits violet light and the other blue light, or one emits ultraviolet light and the other blue light. The third light source 603 comprises two light sources, 6031 and 6032, with different wavelengths. The excitation light emitted by these two light sources is guided to a first condenser lens through a first dichroic element 610 and a fourth dichroic element 620, respectively, and then incident on the wavelength conversion layer through a non-central position of the first condenser lens. The fourth dichroic element 620 is disposed between the second light source, the third light source, and the first condenser lens. By increasing the number of second and third light sources, the brightness of the emitted light per unit area is further improved.

[0044] Please see Figure 9 , Figure 9 This is a schematic diagram of the light source system according to the seventh embodiment of the present invention. The difference between the seventh embodiment and the sixth embodiment is that the light source system 7 adds a sixth light source.

[0045] The light source system 7 also includes a sixth light source 721. The light emitted by the sixth light source 721 passes through the center of the first condenser lens 705. By adding a sixth light source, the brightness of the emitted light per unit area can be further improved.

[0046] The excitation light source and excitation light source module in the above embodiments are the same concept.

[0047] The present invention further provides a projection device formed by the above-described light source system.

[0048] The light source system and projection device are configured with a first light source, a second light source, a third light source, a wavelength conversion layer, and a first condenser lens. The first light source emits a first excitation light, the second light source emits a second excitation light, and the third light source emits a third excitation light. The first light source is positioned on one side of the wavelength conversion layer, and the second and third light sources are positioned on the other side. The first condenser lens is positioned between the second and third light sources and the wavelength conversion layer. When the second and third excitation lights are incident on the first condenser lens, their optical axes are parallel to the principal optical axis of the first condenser lens and they are incident from a non-central position. The first condenser lens refracts the second and third excitation lights onto the wavelength conversion layer, such that the light spots of the second and third excitation lights on the wavelength conversion layer at least partially overlap. This allows the light source system and projection device to solve the problem of insufficient brightness per unit area in fixed light source systems by increasing the energy of the excitation light per unit area of ​​the wavelength conversion layer, thereby increasing the brightness per unit area and improving the overall brightness of the light source system.

[0049] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A light source system, characterized in that, It includes a first light source, a second light source, a third light source, a wavelength conversion layer, and a first focusing lens. The first light source is used to emit a first excitation light, the second light source is used to emit a second excitation light, and the third light source is used to emit a third excitation light. The first light source is disposed on one side of the wavelength conversion layer, and the second and third light sources are disposed on the other side of the wavelength conversion layer. The first condenser lens is disposed between the second and third light sources and the wavelength conversion layer. When the second and third excitation lights are incident on the first condenser lens, the optical axes of the second and third excitation lights are parallel to the principal optical axis of the first condenser lens, and they are incident from a non-central position of the first condenser lens. The first condenser lens refracts the second and third excitation lights onto the wavelength conversion layer, such that the light spot of the second excitation light on the wavelength conversion layer and the light spot of the third excitation light on the wavelength conversion layer at least partially overlap.

2. The light source system according to claim 1, characterized in that, The overlap rate between the spot of the second excitation light on the wavelength conversion layer and the spot of the third excitation light on the wavelength conversion layer is more than 80%.

3. The light source system according to claim 1, characterized in that, The overlap rate between the spot of the second excitation light on the wavelength conversion layer and the spot of the third excitation light on the wavelength conversion layer is above 98%.

4. The light source system according to claim 1, characterized in that, The light source system also includes multiple light source components located on the other side of the wavelength conversion layer, with the light spot emitted by each light source component being uniformly distributed at the non-central position of the first condenser lens.

5. The light source system according to claim 1, characterized in that, The curvature of the first condenser lens is less than or equal to 80 mm.

6. The light source system according to claim 1, characterized in that, The distance between the first condenser lens and the wavelength conversion layer is less than or equal to the focal length of the first condenser lens.

7. The light source system according to claim 1, characterized in that, It also includes a first dichroic element, which is used to guide the second excitation light and the third excitation light to the first condenser lens.

8. The light source system according to claim 7, characterized in that, The first dichroic element includes a first part and a second part. The second light source and the third light source are disposed opposite to each other. The first part is used to guide the second excitation light to the first condenser lens, and the second part is used to guide the third excitation light to the first condenser lens.

9. The light source system according to claim 7, characterized in that, The first dichroic element is a single element, and the second light source and the third light source are arranged side by side on one side of the first dichroic element.

10. The light source system according to claim 8 or 9, characterized in that, It includes a first shaping device and a second shaping device. The first shaping device is used to shape the second excitation light, and the second shaping device is used to shape the third excitation light, so that the spot shape of the second excitation light on the wavelength conversion layer is the same as or similar to the spot shape of the third excitation light on the wavelength conversion layer.

11. The light source system according to claim 10, characterized in that, The first shaping device and the second shaping device include one or more combinations of lens groups, lenses, square rods, or compound eye lenses.

12. The light source system according to claim 10, characterized in that, Both the first shaping device and the second shaping device are lenses. The first shaping device is used to focus the second excitation light onto the non-central position of the first condenser lens. Through the convergence of the first condenser lens, the center of the light spot of the second excitation light is located approximately at the center of the wavelength conversion layer. The second shaping device is used to focus the third excitation light onto the non-central position of the first condenser lens. Through the convergence of the first condenser lens, the center of the light spot of the third excitation light is located approximately at the center of the wavelength conversion layer.

13. The light source system according to claim 1, characterized in that, The first light source further includes two sets of light sources. A second dichroic element is disposed between the first light source and the wavelength conversion layer. The second dichroic element is used to support the wavelength conversion layer, or the second dichroic element and the wavelength conversion layer are disposed independently.

14. The light source system according to claim 1, characterized in that, It also includes a fourth light source and a fifth light source, wherein the second light source and the third light source are arranged opposite to each other, and the fourth light source and the fifth light source are arranged opposite to each other.

15. The light source system according to claim 1, characterized in that, The second light source includes two light sources with different wavelengths; the third light source includes two light sources with different wavelengths.

16. The light source system according to claim 15, characterized in that, It also includes a sixth light source, the light emitted by which passes through the center of the first focusing lens.

17. A projection device, characterized in that, The light source system included in any one of claims 1-16.

Images