CN117270304A - Light source system and projection device - Google Patents

Abstract

The present application protects a light source system comprising: the first light module comprises a first light source and a second light source, wherein the first light source is used for emitting first light, and the second light source is used for emitting second light. The second optical module comprises a third light source, and the third light source is used for emitting third light. The light combining module is used for combining the first light, the second light and the third light, wherein the optical expansion of the first light and the second light is larger than that of the third light, the third light is red laser, the light path distance from the third light source to the light outlet of the light combining module is larger than that from the first light source to the light outlet of the light combining module, and the light path distance from the third light source to the light outlet of the light combining module is larger than that from the second light source to the light outlet of the light combining module. Compared with the scheme of wavelength light combination, the design difficulty and the manufacturing difficulty of optical elements in the light combination module are reduced.

Description

A light source system and projection device

Technical field

The present application relates to the field of display technology, and in particular to a light source system and a projection device.

Background technique

With the improvement of information technology, people have higher and higher requirements for convenient interactive displays. For example, they need to create an interactive space to provide a surface for virtual activities, such as games, art, puzzles, etc., to give people a personal experience. a feeling of. Although mobile phones and smart tablets can achieve convenient display, it is difficult to achieve truly interactive display due to their display methods. Therefore, to achieve flexible interactive display, currently the only technical route is projection.

In the existing projection convenient interactive technology, because the usage scenarios do not have high brightness requirements, most of them use LED combination light sources to achieve white light emission. However, due to the insufficient brightness of the LED light source itself and the difficulty in designing related optical components, and It is difficult to reduce the size of the light source, making it impossible to mass-produce the key optical components in the light source. At the same time, due to the low light efficiency and short life of the LED light source, light source devices need to be replaced frequently, and the color gamut of the LED combined light source is limited, which cannot be satisfied. Users have requirements for high-quality projection interactive space. Therefore, how to provide a light source system with low cost, small size, high brightness and good color gamut is an urgent problem for those skilled in the art to solve.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, on the one hand, the present application provides a light source system with low cost, small size, high brightness and good color gamut to be more suitable for the projection system, including: a first optical module, the first optical module It includes a first light source and a second light source, the first light source is used to emit first light, and the second light source is used to emit second light. A second light module, the second light module includes a third light source, and the third light source is used to emit third light. A light combining module, the light combining module is used to combine the first light, the second light and the third light, wherein the optical etendue of the first light and the second light Greater than the optical etendue of the third light, the third light is a red laser, and the optical path distance from the third light source to the light outlet of the combined light module is greater than the distance from the first light source to the combined light module. The light path distance of the light outlet, the light path distance from the third light source to the light outlet of the light combining module is greater than the light path distance from the second light source to the light outlet of the light combining module.

In some embodiments, the first light is blue light, the second light is green light, and the optical path distance from the first light source to the light outlet of the combined light module is greater than the distance between the second light source and the combined light module. The optical path distance of the light outlet of the optical module.

In some embodiments, the first optical module further includes: a collection component, the collection component includes a first collection component and a second collection component, the first collection component and the second collection component are respectively used to collect The first light and the second light are collected; a polarizing component, the polarizing component is arranged after the collecting component, the polarizing component includes a first polarizing component and a second polarizing component, the The first polarizing component and the second polarizing component are used to polarize the first light and the second light respectively; a recycling component is arranged after the polarizing component, and the recycling component The component includes a first recycling component and a second recycling component, the first recycling component and the second recycling component are respectively used to recycle the first light and the second light so that the first light and The second light is recycled onto the first light source or the second light source.

In some embodiments, the second optical module further includes: a first reflecting mirror, the first reflecting mirror is used to reflect the third light, so that the third light is incident into the combined light. Module; a speckle component, the speckle component is arranged between the first reflector and the light combining module or after the light combining module, and is used for speckling the third light.

In some embodiments, the light combining module includes a first light combining component and a second light combining component: the first light combining component is used to transmit the third light, reflect the first light or the third light combining component. Two lights; the second light combining component is arranged on the exit light path of the first light combining component, and the second light combining component is used to transmit the third light, the first light, and reflect the second light Or used to transmit the third light and the second light to reflect the first light.

In some embodiments, the light combining module includes a third light combining component and a fourth light combining component: the third light combining component includes a central hole part and a peripheral part, and the central hole is used to transmit the Third light, the peripheral part is used to reflect the first light or the second light to achieve extended light combining; the fourth light combining component is arranged on the exit light path of the third light combining component, The fourth light combining component includes a second central hole and a second peripheral part, the second central hole is used to transmit the third light and the first light, and the peripheral part is used to transmit the first light and reflect The second light may be used to transmit the second light and reflect the first light.

In some embodiments, the first light module further includes a third supplementary light source, the supplementary light source is used to emit excitation light, and the excitation light irradiates the first light source or the second light source, and the third A first light or a second light phosphor is provided on the surface of a light source or the second light source. The excitation light irradiates the phosphor to generate supplementary light. The supplementary light passes through the first light source or the third light source. The two light sources are reflected and then injected into the combined light module.

In some embodiments, the light source system further includes a collimating lens, the collection component is a conical reflector or a collection lens, and the collimating lens is disposed on the exit optical path of the conical reflector to detect the The light is collimated.

In some embodiments, the light source system further includes a light uniforming module, which is disposed on the light path emitted by the light combining module and is used for uniformizing the light combined by the light combining module.

On the other hand, this application also provides a projection device including the above light source system.

In some embodiments, the projection device further includes: a light modulation module, the light modulation module includes a light modulator, the light modulator is an LCOS, and a lens system, the lens system is a direct projection lens or an ultra-short projection lens. Focus lens.

Compared with the existing technology, this application uses a first optical module and a second optical module with different optical etendues, and the third light is a red laser, which enables the light source system to emit higher light intensity in an extremely small volume. brightness, and compared with the solution of combining wavelengths, it reduces the design difficulty and manufacturing difficulty of optical components in the combined light module. Compared with the existing technology that uses multiple LEDs to achieve projection, it can improve the luminescence of the light source system. The efficiency improves the color gamut of the images emitted by the projection device, reduces the design difficulty of key optical components, avoids the need for frequent replacement of light source devices, and provides the possibility for larger-scale mass production of projection products.

Description of the drawings

Figure 1 is a schematic diagram of the basic optical architecture of the light source system;

Figure 2A is a schematic structural diagram of Embodiment 1 of the light source system of the present application;

Figure 2B is another structural schematic diagram of Embodiment 1 of the light source system of the present application;

Figure 3 is a schematic structural diagram of Embodiment 2 of the light source system of the present application;

FIG. 4 is a schematic structural diagram of a light combining module in Embodiment 3 of the light source system of the present application.

Figure 5 is a schematic structural diagram of the projection device of the present application;

Figure 6 is another structural schematic diagram of the projection device of the present application.

Detailed ways

In related technologies, most use a light source formed by a combination of red LED, blue LED and green LED to achieve white light emission. Due to the insufficient brightness of the LED light source itself, in environments with slightly higher brightness requirements, the only way to achieve white light emission is by increasing the number of LEDs. To achieve higher brightness, since red LED has the largest brightness demand, a combination of first red LED, second red LED, green LED and blue LED is generally used to achieve light source combination. However, due to the The expansion amount is large. When combining light, especially when red LED and green LED are combined, higher requirements are put forward for the design difficulty of the light combining components and the light combining efficiency. Moreover, due to the use of multiple LEDs, Under the same brightness requirements, the overall volume of the light source is larger. Therefore, there is an urgent need for a light source system with small size, high brightness, and high light synthesis efficiency.

Therefore, this application proposes a new light source system that makes full use of the difference in optical etendue between LED light sources and laser light sources, and redesigns the layout of optical elements, which can effectively reduce costs, reduce volume, increase brightness, and improve color. area. It can be understood that in addition to being used in business machines, educational machines and other projectors in the traditional projection industry, the projection device of the present application can also be better used in desktop projections and micro projectors due to its simple architecture and powerful functions. , mobile phone integrated projection and other interactive projection scenarios have very broad application prospects.

Please refer to FIG. 1 , which is a schematic diagram of the basic optical architecture of the light source system of the present application. The light source system includes a first optical module 10 , a second optical module 20 , a light combining module 30 and an even light module 40 . The first light module 10 includes a first light source 11 and a second light source 12. The first light source 11 is used to emit first light, and the second light source 12 is used to emit second light. In some embodiments, the first light may be blue light. Or green light, the second light is green light or blue light. The second light module 20 includes a third light source 21. The third light source 21 is used to emit third light. In this embodiment, the third light is red light. The light combining module 30 is used to combine the first light, the second light and the third light. The methods that can be used include the wavelength combining method or the extended light combining method. The detailed structure will be introduced later and will not be described here. . Among them, the expansion of the first light and the second light is greater than that of the third light. For example, the first light and the second light can be broad-spectrum light emitted by LEDs or fluorescence. The fluorescence can be generated in the form of fixed fluorescent wheels, color wheels, etc. , this article does not limit this. The third light may be laser, preferably, it is linearly polarized laser. Since the optical etendues of the first light and the second light are greater than that of the third light, when combining the first light, the second light and the third light, the differences in the spectra of the three lights and the differences between the three lights can be fully utilized. The difference in the optical etendue of the two lights can further reduce the volume of the light source while further increasing the brightness after combining the light sources. At the same time, due to the large etendue of the first light source and the second light source in the first optical module, the non-imaging optical principle can be fully utilized to recycle the light emitted from the first optical module 10, significantly improving the light extraction efficiency of the light source.

The embodiments of the present application will be described in detail below with reference to the drawings and implementation modes.

Please refer to FIG. 2A , which is a schematic structural diagram of Embodiment 1 of the light source system of the present application. The first light module 10 of the light source system 1000 includes a first light source 11 and a second light source 12, specifically including a light source component, a collecting component, a polarizing component and a recycling component, wherein the light source component includes a first light source component 111 and a second light source component. 121, used to emit first light and second light. In this embodiment, the first light source component 111 and the second light source component 121 are LED light sources, the first light is blue light, and the The second light is green light. Preferably, the spectral range of the first light is 480±15nm, and the spectral range of the second light is 538nm±15nm; the collection component is arranged on the exit light path of the light source component, including the first Collection component 121 and second collection component 122. The first collection component 121 and the second collection component 122 are respectively used to collect the light emitted from the first light source component 111 and the second light source component 121 and irradiate the polarized light. on the component; the polarizing component is arranged on the exit light path of the collection component, including a first polarizing component 113 and a second polarizing component 123 for polarizing the first light and the second light emitted from the collection component, thereby matching In the subsequent opto-mechanical system (described in detail later and will not be described in this section), the first polarizing component 113 and the second polarizing component 123 can use linear polarizers for polarization; on the exit light path of the polarizing component, there are also There is a recycling component. The recycling component includes a first recycling component 114 and a second recycling component 124. The recycling component is used to pass the light of the first polarization state polarized by the first polarizing component 113 and the second polarizing component 123, and The light in the second polarization state perpendicular to the first polarization state is reflected back to the light source component for reuse. In some embodiments, the recycling component is a reflective polarizing brightness enhancement film (DBEF, dual brightness enhancement film). In some embodiments, the first polarizing component and the first recycling component are designed integrally, which can effectively reduce the volume of the first optical module.

In some embodiments, the light source system also includes a collimating lens 1121 (1221), and the collection component can be adopted as a conical reflector 1221 (1222) or a collection lens 1221 (1222). The collimating lens is disposed on the conical reflector. on the path of the outgoing light. The smaller end of the conical reflector 1221 is the incident surface, and the larger end is the exit surface, so that the first light or the second light emitted by the light source component is incident into the interior of the conical reflector through the incident surface. After reflection from the side wall of the conical reflector, it is emitted from the exit surface or directly, so that the area of the exit light spot is larger than the area of the incident light spot, thereby reducing the divergence angle of the light beam, thereby converting the first light or the second light in a non-imaging manner. The light is emitted to match the subsequent modulated optical module. The conical reflector 1221 in this embodiment is a solid conical light guide rod, and the light beam is reflected on the side of the conical reflector 1221 through total reflection. In other embodiments of the present application, the conical reflector 1221 may also be a hollow conical reflector composed of a reflecting plate/reflecting surface, which will not be described again here. The collimating lens can use Fresnel lenses, free-form lenses, etc., which can collimate the light spot to match the illumination required by the subsequent modulation panel. In some embodiments, please refer to Figure 3. The first light module also includes a supplementary light source 13. The supplementary light source 13 is used to emit excitation light. The excitation light irradiates the first light source 10 or the second light source 11. The first light source The first light or the second light phosphor is provided on the surface of the first light source 11 or the second light source 12. The excitation light irradiates the phosphor to generate supplementary light. The supplementary light is reflected by the first light source 10 or the second light source 11 and then enters the combined light. In the optical module 30, in this embodiment, the supplementary light source is a blue laser, the first light source is a blue LED, the second light source is a green LED, the surface of the second light source is provided with green phosphor, and the blue laser irradiates the surface of the second light source. After adding green phosphor, it is remotely excited to produce green fluorescence. After being reflected by the green LED, the green fluorescence is irradiated into the combined light module. Through such an arrangement, the efficiency of the light source system in generating green light can be further increased. Since green light contributes more to the brightness of white light, this arrangement helps to significantly increase the brightness of the light source.

In some embodiments, please continue to refer to FIG. 2A , the second light module 20 includes a third light source 21 , a first reflector 22 , an evanescent spot component 23 and a collimation component 24 , wherein the third light source 21 is used to emit a third Light, the third light source is a red laser. Preferably, the spectrum range of the third light source is 625nm+2nm. Since the third light emitted by the third light source is different from the first light emitted by the first light source and the second light emitted by the second light source. The difference in the spectral range is large, so the design of the light combining module 30 is less difficult. At the same time, because the third light source is compared with the red wide spectrum light emitted by the LED red light source, the color coordinates are closer to the extreme value of the color gamut. , so the color gamut range of this light source system is larger than the color gamut range of the combined light source of red LED, blue LED and green LED, so the color rendering effect is also better, effectively improving the user experience. The first reflector is mainly used to reflect the third light so that the third light enters the light combining module 30. From the optical path structure described in FIG. 2A, the first reflector can make full use of the first light source and the second light source. The light source is in a horizontal space. At the same time, this design can limit the volume of the light source system on the basis of reducing interference between light source components. In some embodiments, the speckle dissipation component 23 is provided between the first reflector and the light combining module. Through such an arrangement, on the one hand, the speckle of the third light can be effectively eliminated and the white light emitted from the light source system can be improved. Efficiency, on the other hand, can also broaden the optical etendue of the third light, so that the first light, the second light and the third light can fully contact each other in the light combining module to achieve better light combining; in some cases In the embodiment, the first reflector and the evanescent spot component are designed in an integrated manner, capable of evanescent spot and reflection of the third light; in other embodiments, the evanescent spot component 23 is disposed behind the light combining module 30 and the uniform light module 30 . In this way, the difference in optical etendue between the third light and the first light and the second light can be fully utilized, and then the light combining module can be designed differently to improve the light combining efficiency of the light combining module.

In some embodiments, for the solution in which the evanescent spot component 23 is disposed between the first reflector and the light combining module, please continue to refer to FIG. 2A . The light combining module 30 may include a first light combining component 31 and a second light combining component 31 . Light component 32, the first light combining component 31 is a wavelength combining component, that is, the first light combining component is used to transmit the first light or the second light, the second light combining component 32 is a wavelength combining component, and the second light combining component 32 is a wavelength combining component. The light combining component 32 is disposed on the exit light path of the first light combining component 31. The second light combining component 32 is used to transmit the third light, the first light, reflect the second light, or to transmit the third light, the second light, Reflect the first light. In this embodiment, the first light combining component 31 is used to transmit red light and reflect green light. The second light combining component 31 is used to transmit red light and green light and reflect blue light. In other embodiments, , in the solution shown in Figure 3, the first light combining component is used to transmit red light and blue light, and reflect green light, and the second light combining component is used to reflect blue light, and transmit red light and green light. Through such an arrangement, it can be ensured that the expansion amount of the third light after the spots have been eliminated by the elimination spot component 23 matches the expansion amount of the first light and the second light, so that light combining can be achieved through wavelength combining, and due to the elimination of spots The component 23 can also be designed integrally with the first reflector, which can further reduce the volume of the optical path.

In other embodiments, for the solution in which the speckle component 23 is disposed between the light combining module and the light uniforming module 40, please continue to refer to Figure 2A and refer to Figure 3 and Figures 4(a) and 4(b) together. The light combining module 30 may include a third light combining component 33 and a fourth light combining component 34 . The third light combining component 33 includes a central hole part 331 and a peripheral part 332. The central hole 331 is used to transmit the third light, and the peripheral part 332 is used to reflect the first light or the second light to achieve extended light combining. The fourth light combining component 34 is disposed on the exit light path of the third light combining component 33. The fourth light combining component includes a second central hole 341 and a second peripheral part 342. The second central hole 341 is used to transmit the third light and the third light combining component. One light, the peripheral portion 342 is used to transmit the first light and reflect the second light or to transmit the second light and reflect the first light. In some embodiments, the central hole 331 of the third light combining component 33 is used to transmit the third light with a small expansion amount, the peripheral part 332 is used to reflect green light, and the second central hole 341 of the fourth light combining component is used to Through the small expansion of the red laser and green light, the second peripheral part 342 of the fourth light combining component 34 is used to transmit the green light and reflect the blue light. In other embodiments, as shown in Figure 3, the first central hole of the third light combining component is used to transmit red laser and blue supplementary light, the first peripheral part is used to reflect green light, and the fourth light combining component The second peripheral part of the component is used to reflect blue light, and the second central hole part of the fourth light combining component is used to transmit red laser light and green light. Through such an arrangement, the difference between the etendue of the third light and the etendue of the first light and the second light can be fully utilized, so that the light combining can be realized through the etendue combining method, and the scheme of intersecting the wavelength combining can be achieved. Maximize the input of the red laser into the subsequent optical system. Since the efficiency of red light itself is not high, this design can maximize the utilization of the red laser.

In some embodiments, the light path distance from the third light source 21 to the light outlet of the light combining module 30 is greater than the light path distance from the first light source 11 to the light outlet of the light combining module 30 . The optical path distance is greater than the optical path distance from the second light source 12 to the light outlet of the light combining module 30 . Specifically, please refer to Figure 2B. The optical path distance from the first light source component 111 to the light outlet of the light combining module 30 is L2+D2+D1, and the light path distance from the second light source component 121 to the light outlet of the light combining module 30 is L1+. D1, the optical path distance from the third light source 21 to the light outlet of the combined light module 30 is L3+D3+D2+D1, L3+D3+D2+D1>L1+D1, and L3+D3+D2+D1>L2+D2 +D1. Among the three light sources: the first light source 11 , the second light source 12 and the third light source 21 , since the etendue of the third light is the smallest, the etendues of the first light and the second light are both greater than the etendue of the third light. Based on the etendue The larger the light, the greater the light loss during propagation. Therefore, during the propagation process, the first light and the second light are more likely to suffer light loss than the third light. When designing the optical path, it is preferable to place the first light source 11 and the second light source 12 relatively close to the outlet of the optical module 30, so that the light loss of the first light and the second light can be relatively reduced.

In some embodiments, the first light is blue light, the second light is green light, and the light path distance from the first light source to the light outlet of the light combining module is greater than the light path distance from the second light source to the light outlet of the light combining module. Specifically, please refer to Figure 2B. The optical path distance from the first light source component 111 to the light outlet of the light combining module 30 is L2+D2+D1, and the light path distance from the second light source component 121 to the light outlet of the light combining module 30 is L1+. D1, the optical path distance from the third light source 21 to the light outlet of the combined light module 30 is L3+D3+D2+D1, and L3+D3+D2+D1>L2+D2+D1>L1+D1. Among the two light sources, the second light source 12 and the first light source 11 , because green light contributes greatly to the brightness of the picture, it is necessary to give priority to reducing light loss. Therefore, when designing the light path, priority is given to the second light source 12 to be relatively coupled to the light module 30 A closer outlet can relatively reduce the light loss of green light and make the display brighter.

It should be noted that, unlike the embodiment shown in FIG. 2A , in the embodiment shown in FIG. 2B , the first light combining component 31 is used to transmit red light and reflect blue light, and the second light combining component 32 is used to transmit red light. Light, blue light, reflected green light.

Please continue to refer to FIG. 2A. In some embodiments, the light source system also includes a light uniformity module 40. The light uniformity module 40 is disposed on the light path emitted from the light combining module 30 and is used to evenly combine the light combined by the light combining module 30. Light. Preferably, the light uniforming module 40 includes a light uniforming element (not shown). The light uniforming element can be a compound eye lens or a square rod. Preferably, the light uniforming element is a compound eye lens, which can adapt to the expansion amount of the light module. Light embodiment.

Please refer to FIG. 5 , which is a projection device provided by this application including the light source system in Embodiment 1 to Embodiment 3. The projection device also includes a light modulation module 50 and a lens module 60 .

In some embodiments, the light modulation module 50 includes a second reflecting mirror 51 , a polarizing beam splitting prism 52 and a light modulating component 53 , wherein the tilt direction of the second reflecting mirror is consistent with the first light combining component 31 in the light combining module 30 Parallel to the tilt direction of the second light combining component 32, the tilt angle of the first light combining component 31 and the second light combining component 32 is 135 degrees from the horizontal direction. The polarizing beam splitting prism 52 is disposed on the exit light path of the second reflecting mirror, and is used to irradiate the light reflected by the second reflecting mirror 51 into the light modulating component 53. The light modulating component 53 is used to modulate the incident light, wherein the polarizing beam splitting prism 52 is arranged on the exit light path of the second reflecting mirror. A dichroic film is disposed in the middle of the prism 52. The inclination direction of the dichroic film is parallel to the inclination direction of the second reflecting mirror 51. It is used to reflect the light of the first polarization state, transmit the light of the second polarization state, and modulate the light. The component 53 is a liquid crystal on silicon (LCOS), capable of modulating light in a first polarization state. In this embodiment, the light in the first polarization state is light in an S-polarization state, and the second polarization state is The light in the P polarization state is light in the P polarization state. A direct projection lens 60 is also provided in the gap between the right side of the light modulation module and the upper side of the light source system, which can make full use of the vertical and horizontal spaces, making the entire optical path layout compact and smaller. At the same time, because LCOS is used for modulation, its reflective control principle can be fully utilized to further compress the optical path volume.

In some embodiments, please refer to another embodiment of the projection device shown in FIG. 6 . In this embodiment, the light modulation module 50 includes a third reflective mirror 51 ′, a polarizing beam splitting prism 52 and a light modulation component 53 , wherein the The tilt direction of the two reflecting mirrors is perpendicular to the tilt direction of the first light combining component 31 and the second light combining component 32 in the light combining module 30, and the tilt angle of the first light combining component 31 and the second light combining component 32 is consistent with the tilt angle of the first light combining component 31 and the second light combining component 32. The angle between the horizontal directions is 135 degrees. The polarizing beam splitting prism 52 is arranged on the exit light path of the second reflecting mirror 51'. The polarizing beam splitting prism 52 is provided with a beam splitting film. The inclination direction of the beam splitting film is parallel to the inclination direction of the second reflecting mirror 51, and is used to reflect the second light. The light reflected by the mirror 51' irradiates into the light modulation component 53. The light modulation component 53 is used to modulate the incident light. The polarization beam splitting prism 52 is used to reflect the light of the first polarization state, and for the light of the second polarization state Light is transmitted, and the light modulation component 53 is the same as the previous embodiment, which will not be described again. There is also an ultra-short throw lens in the gap between the right side of the light modulation module and the left side of the light source system, which can make full use of the vertical and horizontal space, making the layout of the entire optical path in the horizontal space more compact and smaller.

The light source system and the projection system provided in this embodiment use the first optical module and the second optical module with different optical etendues, so that the light source system can emit higher brightness in an extremely small volume. The three lights are red lasers. Since the etendue of the third light emitted by the second optical module is smaller than the etendue of the first light and the second light emitted by the first optical module, the design of the optical elements in the combined optical module is reduced. Difficulty and manufacturing difficulty. Compared with the existing technology that uses multiple LEDs to achieve projection, it can improve the luminous efficiency of the light source system, improve the color gamut of the picture emitted by the projection device, reduce the design difficulty of key optical components, and avoid the need for Frequent replacement of light source devices provides the possibility for larger-scale mass production of projection products.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

The above descriptions are only embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies fields are equally included in the scope of patent protection of this application.

Claims (10)

1. A light source system, characterized in that it includes: A first light module, the first light module includes a first light source and a second light source, the first light source is used to emit first light, and the second light source is used to emit second light; a second optical module, the second optical module includes a third light source, the third light source is used to emit third light; A light combining module, the light combining module is used to combine the first light, the second light and the third light, wherein, The optical etendue of the first light and the second light is greater than the optical etendue of the third light, and the third light is a red laser, The light path distance from the third light source to the light outlet of the light combining module is greater than the light path distance from the first light source to the light outlet of the light combining module, and the light path distance from the third light source to the light outlet of the light combining module is The optical path distance is greater than the optical path distance from the second light source to the light outlet of the light combining module. 2. A light source system as claimed in claim 1, characterized in that the first light is blue light, the second light is green light, and the distance from the first light source to the light outlet of the light combining module The optical path distance is greater than the optical path distance from the second light source to the light outlet of the light combining module. 3. A light source system as claimed in claim 1, characterized in that the first optical module further includes: A collection component, the collection component includes a first collection component and a second collection component, the first collection component and the second collection component are respectively used to collect the first light and the second light; A polarizing component, the polarizing component is arranged after the collecting component, the polarizing component includes a first polarizing component and a second polarizing component, the first polarizing component and the second polarizing component are respectively used. for polarizing the first light and the second light; Recycling component, the recycling component is arranged after the deflection component, the recycling component includes a first recycling component and a second recycling component, the first recycling component and the second recycling component are respectively used to recycle the The first light and the second light are recycled such that the first light and the second light are recycled onto the first light source or the second light source. 4. A light source system as claimed in claim 1, characterized in that the second optical module further includes: A first reflector, the first reflector is used to reflect the third light, so that the third light is incident into the light combining module; A speckle component, which is disposed between the first reflector and the light combining module or behind the light combining module, is used to speckle the third light. 5. A light source system as claimed in claim 1, characterized in that the light combining module includes a first light combining component and a second light combining component: The first light combining component is used to transmit the third light and reflect the first light or the second light; The second light combining component is disposed on the exit light path of the first light combining component, and the second light combining component is used to transmit the third light, the first light, reflect the second light, or to The third light is transmitted and the second light reflects the first light. 6. A light source system as claimed in claim 1, characterized in that the light combining module includes a third light combining component and a fourth light combining component: The third light combining component includes a central hole part for transmitting the third light and a peripheral part for reflecting the first light or the second light to achieve Extended amount of combined light; The fourth light combining component is disposed on the exit light path of the third light combining component. The fourth light combining component includes a second central hole and a second peripheral part. The second central hole is used to transmit the Third light and first light, the peripheral part is used to transmit the first light and reflect the second light or to transmit the second light and reflect the first light. 7. A light source system as claimed in claim 5, wherein the first light module further includes a supplementary light source, the supplementary light source is used to emit excitation light, and the excitation light irradiates the first On the light source or the second light source, a first light or a second light phosphor is provided on the surface of the first light source or the second light source, and the excitation light irradiates the phosphor to generate supplementary light. The supplementary light is reflected by the first light source or the second light source and then enters the light combining module. 8. A light source system as claimed in claim 3, characterized in that, the light source system further includes a collimating lens, the collecting component is a conical reflector or a collecting lens, the collimating lens is disposed on the The output light path of the conical reflector is used to collimate the light. 9. A light source system as claimed in claim 1, characterized in that, the light source system further includes a light uniformity module, the light uniformity module is disposed on the light path emitted from the light combining module, and is used for The light combined by the light combining module is uniformly lighted. 10. A projection device, characterized in that it includes: An optical modulation module, the optical modulation module includes an optical modulator, and the optical modulator is an LCOS; a lens system, which is a direct throw lens or an ultra-short throw lens; and The light source system according to claims 1-9.