Light source system and projection device

Abstract

The light source system comprises a first light source and a second light source, the first light source is used for emitting first light, and the second light source is used for emitting second light; 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, the supplementary light source is used for emitting exciting light, the exciting light irradiates the first light source or the second light source, and the light combining module is used for combining the first light, the second light and the third light. First light fluorescent powder or second light fluorescent powder is arranged on the surface of the first light source or the second light source; the exciting light irradiates the first light fluorescent powder or the second light fluorescent powder to generate supplementary light, and the supplementary light is reflected by the first light source or the second light source and then enters the light combining module; and the light uniformizing module is arranged on an emergent light path of the light combining module and is used for uniformizing the light combined by the light combining module. Compared with a wavelength light combination scheme, the design difficulty and the manufacturing difficulty of optical elements in the light combination module are reduced.

Description

[0001] This application is a divisional application, whose parent application is a patent application with the application number CN202210666781.2 and the application date of June 13, 2022, and the invention name of “a light source system and a projection device”. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a light source system and a projection device. BACKGROUND

[0003] With the improvement of information technology, people's requirements for convenient interactive display are getting higher and higher. For example, it is necessary to create an interactive space to provide a surface for virtual activities, such as games, arts, puzzles, etc., to give people a sense of physical experience. Although mobile phones and smart tablets can realize convenient display, they are limited by their display methods and cannot realize real interactive display. Therefore, to realize flexible interactive display, the current only technical route is projection.

[0004] In the existing projection convenient interactive technology, since the requirement for brightness is not high in the use scene, LED combined light sources are mostly used to realize white light emission. However, since the brightness of the LED light source itself is insufficient, the design difficulty of the related optical elements is high, and the volume of the light source is difficult to reduce, the key optical elements in the light source cannot be mass-produced, and since the light combination efficiency of the LED light source is low, the service life is short, the light source device needs to be frequently replaced, and the color gamut of the LED combined light source is limited, which cannot meet the requirements of users for high-quality projection interactive space. Therefore, how to provide a light source system with low cost, small volume, high brightness and good color gamut is an urgent problem for those skilled in the art. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a light source system with low cost, small volume, high brightness and good color gamut to better adapt to the projection system, which comprises: a first light module, the first light module comprises 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 comprises a third light source, and the third light source is used to emit third light. A light combination 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, the third light is red laser, the optical path distance from the third light source to the light outlet of the light combination module is greater than the optical path distance from the first light source to the light outlet of the light combination module, and the optical path distance from the third light source to the light outlet of the light combination module is greater than the optical path distance from the second light source to the light outlet of the light combination module.

[0006] 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 exit port of the light combination module is greater than the optical path distance from the second light source to the light exit port of the light combination module.

[0007] In some embodiments, the first light module further comprises: a collection assembly, the collection assembly comprising a first collection assembly and a second collection assembly, the first collection assembly and the second collection assembly being configured to collect the first light and the second light, respectively; a polarizing assembly, the polarizing assembly being disposed after the collection assembly, the polarizing assembly comprising a first polarizing assembly and a second polarizing assembly, the first polarizing assembly and the second polarizing assembly being configured to polarize the first light and the second light, respectively; and a recycling assembly, the recycling assembly being disposed after the polarizing assembly, the recycling assembly comprising a first recycling assembly and a second recycling assembly, the first recycling assembly and the second recycling assembly being configured to recycle the first light and the second light, respectively, such that the first light and the second light are recycled onto the first light source or the second light source.

[0008] In some embodiments, the second light module further comprises: a first mirror, the first mirror being configured to reflect the third light such that the third light is incident on the light combination module; and a speckle-elimination assembly, the speckle-elimination assembly being disposed between the first mirror and the light combination module or after the light combination module, the speckle-elimination assembly being configured to eliminate speckle of the third light.

[0009] In some embodiments, the light combination module comprises a first light combination assembly and a second light combination assembly: the first light combination assembly being configured to transmit the third light and reflect the first light or the second light; and the second light combination assembly being disposed on an exit light path of the first light combination assembly, the second light combination assembly being configured to transmit the third light, the first light, reflect the second light or transmit the third light, the second light, reflect the first light.

[0010] In some embodiments, the light combination module comprises a third light combination assembly and a fourth light combination assembly: the third light combination assembly comprising a central hole portion and a peripheral portion, the central hole portion being configured to transmit the third light, the peripheral portion being configured to reflect the first light or the second light to achieve extended light combination; and the fourth light combination assembly being disposed on an exit light path of the third light combination assembly, the fourth light combination assembly comprising a second central hole portion and a second peripheral portion, the second central hole portion being configured to transmit the third light, the first light, the peripheral portion being configured to transmit the first light, reflect the second light or transmit the second light, reflect the first light.

[0011] In some embodiments, the first light module further comprises a supplementary light source for emitting excitation light, the excitation light irradiating onto the first light source or the second light source, the first light source or the second light source being provided with first light or second light fluorescent powder on the surface, the excitation light irradiating the fluorescent powder to generate supplementary light, the supplementary light being reflected by the first light source or the second light source and then entering the light combination module.

[0012] In some embodiments, the light source system further comprises a collimating lens, the collection assembly being a conical reflector or a collection lens, the collimating lens being arranged on the light path of the conical reflector to collimate the light rays.

[0013] In some embodiments, the light source system further comprises a light homogenizing module, the light homogenizing module being arranged on the light path of the light combination module to homogenize the light after the light combination of the light combination module.

[0014] In some embodiments, the light source system further comprises a light homogenizing module, the light homogenizing module being arranged on the light path of the light combination module to homogenize the light after the light combination of the light combination module.

[0015] In some embodiments, the light source system further comprises a light homogenizing module, the light homogenizing module being arranged on the light path of the light combination module to homogenize the light after the light combination of the light combination module.

[0016] Compared with the prior art, the first light module and the second light module with different optical etendue are used, the third light is red laser light, the light source system can emit higher brightness in a very small volume, and compared with the wavelength combination scheme, the design difficulty and manufacturing difficulty of the optical elements in the light combination module are reduced, the light emitting efficiency of the light source system is improved compared with the prior art of using multiple LEDs to realize projection, the color gamut range of the picture emitted by the projection device is improved, the design difficulty of the key optical elements is reduced, the need for frequent replacement of light source devices is avoided, and mass production of the projection product is possible. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of the basic optical architecture of the light source system;

[0018] Figure 2A FIG. 1 is a schematic diagram of the basic optical architecture of the light source system;

[0019] Figure 2B FIG. 1 is a schematic diagram of the basic optical architecture of the light source system;

[0020] Figure 3 FIG. 1 is a schematic diagram of the basic optical architecture of the light source system;

[0021] Figure 4 FIG. 3 is a structural schematic diagram of a light combination module of an embodiment three of the light source system of the present application.

[0022] Figure 5 FIG. 4 is a structural schematic diagram of a projection device of the present application;

[0023] Figure 6 FIG. 5 is another structural schematic diagram of a projection device of the present application. DETAILED DESCRIPTION

[0024] In the related art, a light source formed by a combination of a red LED, a blue LED and a green LED is generally used to realize white light emission. Since the brightness of the LED light source itself is insufficient, in an environment with a slightly higher brightness requirement, a higher brightness can only be realized by increasing the number of LEDs. Since the brightness requirement of the red LED is the largest, a combination of a first red LED, a second red LED, a green LED and a blue LED is generally used to realize the light source combination. However, since the expansion of the LED emission light is large, the design difficulty of the light combination element and the light combination efficiency are both high when the light is combined, especially when the red LED and the green LED are combined. In addition, since multiple LEDs are used, the volume of the light source is large under the same brightness requirement. Therefore, there is an urgent need for a small-volume, high-brightness and high-light-combination-efficiency light source system.

[0025] Therefore, the present application proposes a new light source system which fully utilizes the difference in optical expansion between the LED light source and the laser light source and redesigns the layout form of the optical element, thereby effectively reducing the cost, reducing the volume, improving the brightness and improving the color gamut. It can be understood that the projection device of the present application can be used not only in the traditional projection industry such as business machines and education machines, but also in interactive projection scenarios such as desktop projection, micro-projection, mobile phone integrated projection and the like due to the simple architecture and powerful function, thereby having a very broad application prospect.

[0026] Please refer to Figure 1As a schematic diagram of the basic optical architecture of the light source system of the present application, the light source system comprises a first light module 10, a second light module 20, a light combining module 30 and a light homogenizing module 40. The first light module 10 comprises a first light source 11 and a second light source 12, the first light source 11 is used to emit a first light, and the second light source 12 is used to emit a second light. In some embodiments, the first light can be blue light or green light, and the second light is green light or blue light. The second light module 20 comprises a third light source 21, which is used to emit a third light. In the present 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 combining method can include wavelength combining or extended quantity combining. The detailed structure will be introduced later, and will not be described here. Among them, the extended quantity 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 wide-spectrum light emitted by an LED or fluorescent light. The fluorescent light can be generated in the form of a fixed fluorescent wheel, a color wheel, etc. This will not be limited in the present application. The third light can be a laser, preferably a linearly polarized laser. Since the optical extended quantity of the first light and the second light is greater than that of the third light, when the first light, the second light and the third light are combined, the differences in spectrum and optical extended quantity of the three kinds of light can be fully utilized, thereby enabling the light source to be further reduced in size under the premise of further improving the brightness after light source combining. At the same time, since the optical extended quantity of the first light source and the second light source in the first light module is large, the non-imaging optical principle can be fully utilized to recycle the light emitted by the first light module 10, thereby significantly improving the light emission efficiency of the light source.

[0027] The embodiments of the present application will be described in detail below in conjunction with the drawings and embodiments.

[0028] Please refer to Figure 2AFigure 1 is a schematic diagram of an embodiment of the light source system of the present application. The first light module 10 of the light source system 1000 comprises a first light source 11 and a second light source 12, specifically a light source assembly, a collection assembly, a polarization assembly and a recycling assembly, wherein the light source assembly comprises a first light source assembly 111 and a second light source assembly 121 for emitting a first light and a second light, in this embodiment, the first light source assembly 111 and the second light source assembly 121 are LED light sources, the first light is blue light and the second light is green light, preferably, the spectral range of the first light is 480±15 nm and the spectral range of the second light is 538 nm±15 nm; the collection assembly is disposed on the light path of the light source assembly and comprises a first collection assembly 121 and a second collection assembly 122, the first collection assembly 121 and the second collection assembly 122 are respectively used for collecting the light emitted by the first light source assembly 111 and the second light source assembly 121 and irradiating the light onto the polarization assembly; the polarization assembly is disposed on the light path of the collection assembly and comprises a first polarization assembly 113 and a second polarization assembly 123 for polarizing the first light and the second light emitted by the collection assembly, thereby matching the subsequent optical-mechanical system (to be described in detail below, this part will not be described in detail), the first polarization assembly 113 and the second polarization assembly 123 can be polarized by using a linear polarizer; the recycling assembly is also disposed on the light path of the polarization assembly, the recycling assembly comprises a first recycling assembly 114 and a second recycling assembly 124, the recycling assembly is used for passing the first polarization state light polarized by the first polarization assembly 113 and the second polarization assembly 123 and reflecting the second polarization state light perpendicular to the first polarization state back to the light source assembly for reuse. In some embodiments, the recycling assembly is a reflective polarized brightness enhancement film (DBEF, dual brightness enhancement film). In some embodiments, the first polarization assembly and the first recycling assembly are designed integrally, which can effectively reduce the volume of the first light module.

[0029] In some embodiments, the light source system further comprises a collimating lens 1121 (1221), and the collecting component can be a conical reflector 1122 (1222) or a collecting lens 1122 (1222), and the collimating lens is arranged on the exit light path of the conical reflector. The smaller end of the conical reflector 1122 is the entrance 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 conical reflector through the entrance surface, is reflected by the side wall of the conical reflector, and is emitted by the exit surface or directly emitted, so that the area of the exit light spot is larger than the area of the entrance light spot, thereby reducing the divergence angle of the light beam, and the first light or the second light is emitted in a non-imaging manner to match the subsequent modulation light module. The conical reflector 1122 in the embodiment is a solid conical light guide rod, and the light beam is reflected on the side of the conical reflector 1122 by total reflection. In other embodiments of the present application, the conical reflector 1122 can also be a hollow conical reflector composed of a reflecting plate / reflection surface, which is not described here. The collimating lens can be a Fresnel lens, a free-form surface lens, etc., which can collimate the light spot to match the illumination part required by the subsequent modulation panel. In some embodiments, please refer to Figure 3 , the first light module further comprises a supplementary light source 13, the supplementary light source 13 is used to emit excitation light, the excitation light irradiates on the first light source 10 or the second light source 11, and the first light source 11 or the second light source 12 is provided with first light or second light fluorescent powder on the surface, the excitation light irradiates the fluorescent powder to generate supplementary light, and the supplementary light is reflected by the first light source 10 or the second light source 11 and then enters the light combining module 30. In the embodiment, the supplementary light source is a blue laser, the first light source is a blue LED, and the second light source is a green LED, and the second light source is provided with green fluorescent powder on the surface. After the blue laser irradiates the green fluorescent powder on the surface of the second light source, the green fluorescent powder is remotely excited to generate green fluorescent light, and the green fluorescent light is reflected by the green LED and then irradiates into the light combining module. Through such a setting, the efficiency of the light source system in generating green light can be further increased, and since the brightness contribution of green light in white light is greater, the setting helps to significantly improve the light source brightness.

[0030] In some embodiments, please continue to refer to Figure 2A, the second light module 20 comprises a third light source 21, a first mirror 22, a speckle elimination assembly 23 and a collimating assembly 24, wherein the third light source 21 is configured to emit third light, the third light source is a red laser, preferably, the spectral range of the third light source is 625nm±2nm, since the spectral range of the third light emitted by the third light source is quite different from the spectral range of the first light emitted by the first light source and the second light emitted by the second light source, the design difficulty of the light combination module 30 is smaller, at the same time, since the color coordinates of the red wide spectrum light emitted by the third light source are closer to the color gamut extreme value compared with the red light source, the color gamut range of the light source system is larger than the color gamut range of the combination light source composed of red light LED, blue light LED and green light LED, and the color rendering effect is better, which effectively improves the user experience. The first mirror is mainly used for reflecting the third light so that the third light enters the light combination module 30, and the second light emitted by the second light source is reflected by the first mirror to the light combination module 30. The first mirror is mainly used for reflecting the third light so that the third light enters the light combination module 30, and the second light emitted by the second light source is reflected by the first mirror to the light combination module 30. Figure 2A From the light path architecture, the first mirror can make full use of the space in the transverse direction of the first light source and the second light source, and at the same time, the design can reduce the interference between the light source assemblies and limit the volume of the light source system. In some embodiments, the speckle elimination assembly 23 is arranged between the first mirror and the light combination module, by such arrangement, on the one hand, the speckle of the third light can be effectively eliminated, and the efficiency of the white light emitted by the light source system is improved, on the other hand, the optical etendue of the third light can be expanded, so that the first light, the second light and the third light can fully contact in the light combination module, and better light combination can be realized; in some embodiments, the first mirror and the speckle elimination assembly are designed integrally, which can eliminate speckle and reflect the third light; in other embodiments, the speckle elimination assembly 23 is arranged after the light combination module 30 and before the light homogenization module 40, which can make full use of the difference in optical etendue between the third light and the first light and the second light, and then the light combination module can be designed differently to improve the light combination efficiency of the light combination module.

[0031] In some embodiments, for the scheme that the speckle elimination assembly 23 is arranged between the first mirror and the light combination module, please continue to refer to Figure 2A The light combination module 30 can comprise a first light combination assembly 31 and a second light combination assembly 32, the first light combination assembly 31 is a wavelength light combination assembly, that is, the first light combination assembly is configured to transmit the first light or the second light, the second light combination assembly 32 is a wavelength light combination assembly, the second light combination assembly 32 is arranged on the light path of the first light combination assembly 31, and the second light combination assembly 32 is configured to transmit the third light, the first light, the reflected second light or to transmit the third light, the second light, the reflected first light. In this embodiment, the first light combination assembly 31 is configured to transmit red light and reflect green light, and the second light combination assembly is configured to transmit red light and green light and reflect blue light. In other embodiments, as shown in Figure 3In the shown scheme, the first light combination component is configured to transmit red light and blue light, and reflect green light, and the second light combination component is configured to reflect blue light, and transmit red light and green light. With such a configuration, the expansion of the third light after passing through the speckle-eliminating component 23 can match the expansion of the first light and the second light, so that the light combination can be achieved by wavelength combination, and the speckle-eliminating component 23 can be integrated with the first mirror, so that the volume of the optical path can be further reduced.

[0032] In some other embodiments, the speckle-eliminating component 23 is arranged between the light combination module and the light homogenizing module 40, please continue to refer to Figure 2A and refer to Figure 3 and Figure 4 a、4b, the light combination module 30 can include a third light combination component 33 and a fourth light combination component 34. The third light combination component 33 includes a central hole portion 331 configured to transmit the third light, and a peripheral portion 332 configured to reflect the first light or the second light to achieve expansion combination. The fourth light combination component 34 is arranged on the exit light path of the third light combination component 33, and includes a second central hole portion 341 configured to transmit the third light and the first light, and a second peripheral portion 342 configured to transmit the first light and reflect the second light, or configured to transmit the second light and reflect the first light. In some embodiments, the central hole portion 331 of the third light combination component 33 is configured to transmit the third light with a small expansion, and the peripheral portion 332 is configured to reflect green light. The second central hole portion 341 of the fourth light combination component is configured to transmit red laser light and green light with a small expansion, and the second peripheral portion 342 of the fourth light combination component is configured to transmit green light and reflect blue light. In some other embodiments, as shown in Figure 3 the scheme, the first central hole portion of the third light combination component is configured to transmit red laser light and blue complementary light, the first peripheral portion is configured to reflect green light, the second peripheral portion of the fourth light combination component is configured to reflect blue light, and the second central hole portion of the fourth light combination component is configured to transmit red laser light and green light. With such a configuration, the difference between the expansion of the third light and the expansion of the first light and the second light can be fully utilized, so that the light combination can be achieved by expansion combination, which is intersected with the wavelength combination scheme. This scheme can maximize the red laser light incident to the subsequent optical system. Since the efficiency of red light itself is not high, such a design can maximize the utilization of red laser light.

[0033] In some embodiments, the optical path distance from the third light source 21 to the light exit port of the light combination module 30 is greater than the optical path distance from the first light source 11 to the light exit port of the light combination module 30, and the optical path distance from the third light source 21 to the light exit port of the light combination module 30 is greater than the optical path distance from the second light source 12 to the light exit port of the light combination module 30. For details, please refer to Figure 2BThe optical path distance from the first light source component 111 to the light outlet of the light combining module 30 is L2+D2+D1, the optical path distance from the second light source component 121 to the light outlet of the light combining module 30 is L1+D1, and the optical path distance from the third light source 21 to the light outlet of the light combining 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 (first light source 11, second light source 12, and third light source 21), the third light has the smallest optical expansion. The optical expansion of the first and second lights is greater than that of the third light. Based on the characteristic that light with a larger optical expansion suffers more light loss during propagation, the first and second lights are more prone to light loss than the third light during propagation. When designing the optical path, prioritizing the placement of the first light source 11 and the second light source 12 closer to the outlet of the light combining module 30 can relatively reduce the light loss of the first and second lights.

[0034] 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 output port of the light combining module is greater than the optical path distance from the second light source to the light output port of the light combining module. For details, please refer to [link to relevant documentation]. 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, the optical path distance from the second light source component 121 to the light outlet of the light combining module 30 is L1+D1, and the optical path distance from the third light source 21 to the light outlet of the light combining module 30 is L3+D3+D2+D1, where 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, green light contributes significantly to the screen brightness, so light loss needs to be minimized. Therefore, in the optical path design, the second light source 12 is positioned relatively closer to the outlet of the light combining module 30 to relatively reduce green light loss and make the displayed image brighter.

[0035] It is important to note that, with Figure 2A The embodiments shown are different, in Figure 2B In the embodiment shown, 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, blue light and reflect green light.

[0036] Please continue reading Figure 2A In some embodiments, the light source system further includes a light homogenizing module 40, which is disposed in the light path emitted from the light combining module 30 and is used to homogenize the light after it is combined by the light combining module 30. Preferably, the light homogenizing module 40 includes a light homogenizing element (not shown in the figure), which can be a compound eye lens or a square rod. Preferably, the light homogenizing element is a compound eye lens, which can be adapted to embodiments that combine light with the expansion amount of the light combining module.

[0037] Please see Figure 5The projection device comprises the light source system in Embodiment One to Embodiment Three, and further comprises a light modulation module 50 and a lens module 60.

[0038] In some embodiments, the light modulation module 50 comprises a second mirror 51, a polarization beam splitter 52 and a light modulation assembly 53. The tilt direction of the second mirror is parallel to the tilt directions of the first light combination assembly 31 and the second light combination assembly 32 in the light combination module 30, and the included angle between the tilt angles of the first light combination assembly 31 and the second light combination assembly 32 and the horizontal direction is 135 degrees. The polarization beam splitter 52 is arranged on the light path of the second mirror, and is used to irradiate the light reflected by the second mirror 51 into the light modulation assembly 53. The light modulation assembly 53 is used to modulate the incident light. The polarization beam splitter 52 is provided with a beam splitting film in the middle. The tilt direction of the beam splitting film is parallel to the tilt direction of the second mirror 51, and is used to reflect the light of the first polarization state and transmit the light of the second polarization state. The light modulation assembly 53 is a liquid crystal on silicon (LCOS), which can modulate the light of the first polarization state. In this embodiment, the light of the first polarization state is S-polarized light, and the light of the second polarization state is P-polarized light. A direct projection lens 60 is arranged in the gap between the right side of the light modulation module and the upper side of the light source system, so as to fully utilize the longitudinal space and the transverse space, make the whole light path layout compact, and reduce the volume. At the same time, since the LCOS is used for modulation, the principle of reflection modulation can be fully utilized, and the volume of the light path can be further compressed.

[0039] In some embodiments, please refer to Figure 6Another embodiment of the projection device is shown, in this embodiment, the light modulation module 50 includes a second mirror 51', a polarization beam splitter prism 52 and a light modulation assembly 53, wherein the tilt direction of the second mirror is perpendicular to the tilt direction of the first light combination assembly 31 and the second light combination assembly 32 in the light combination module 30, and the included angle between the tilt angle of the first light combination assembly 31 and the second light combination assembly 32 and the horizontal direction is 135 degrees. The polarization beam splitter prism 52 is arranged on the exit light path of the second mirror 51', and the polarization beam splitter prism 52 is provided with a beam splitting film, the tilt direction of the beam splitting film is parallel to the tilt direction of the second mirror 51', and the beam splitting film is used to irradiate the light reflected by the second mirror 51' into the light modulation assembly 53, and the light modulation assembly 53 is used to modulate the incident light, wherein the polarization beam splitter prism 52 is used to reflect the light of the first polarization state and transmit the light of the second polarization state, and the light modulation assembly 53 is the same as the previous embodiment and will not be described here. In the gap between the right side of the light modulation module and the left side of the light source system, an ultra-short focus lens is also arranged, so as to make full use of the longitudinal space and the transverse space, so that the layout of the entire light path in the transverse space is more compact and the volume is smaller.

[0040] The light source system and the projection system provided by the embodiment can emit higher brightness in a very small volume, because the first light module and the second light module with different optical etendue are used, the third light is red laser, the optical etendue of the third light emitted by the second light module is smaller than the optical etendue of the first light and the second light emitted by the first light module, the design difficulty and the manufacturing difficulty of the optical elements in the light combination module are reduced, the light emitting efficiency of the light source system is improved compared with the technology of using multiple LEDs to realize projection in the prior art, the color gamut range of the picture emitted by the projection device is improved, the design difficulty of the key optical elements is reduced, the light source device needs to be frequently replaced, and the large-scale mass production of the projection product is possible.

[0041] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0042] The above is only the implementation of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and the drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A light source system, characterized in that, include: A first light source and a second light source, wherein the first light source is used to emit a first light and the second light source is used to emit a second light; A third light source, which is used to emit a third light; A light combining module, used to combine the first light, the second light, and the third light. A supplementary light source is provided to emit excitation light, which illuminates the first light source or the second light source. A first phosphor or a second phosphor is disposed on the surface of the first light source or the second light source. The excitation light illuminates the first phosphor or the second phosphor to generate supplementary light, which is reflected by the first light source or the second light source and then enters the light combining module. A light homogenizing module is disposed in the light path emitted by the light combining module and is used to homogenize the light after it has been combined by the light combining module.

2. A light source system as described in claim 1, characterized in that, The first light source and the second light source belong to the first optical module; The first optical module further includes a collection component, which includes a first collection component and a second collection component, the first collection component and the second collection component being used to collect the first light and the second light, respectively.

3. A light source system as described in claim 1, characterized in that, The second light is green light, the second light phosphor is green phosphor, and the supplementary light is blue light.

4. A light source system as described in claim 1, characterized in that, The light combining module includes a first light combining component and a second light combining component, wherein the first light combining component is a wavelength light combining component and the second light combining component is a wavelength light combining module.

5. A light source system as described in claim 4, characterized in that, The second light combining component is used to transmit the third light and the first light, and to reflect the second light; the first light combining component is used to transmit either the first light or the second light; or The second light combining component is used to transmit the third light, the second light, and reflect the first light.

6. A light source system as described in claim 1, characterized in that, The optical path distance from the third light source to the light output port of the light combining module is greater than the optical path distance from the second light source to the light output port of the light combining module.

7. A light source system as described in claim 1, characterized in that, The first light and the second light are broadband light emitted by an LED or are fluorescence.

8. A light source system as described in claim 1, characterized in that, The light source system further includes a collimating lens, and the collecting component is a conical reflector or a collecting lens. The collimating lens is disposed in the outgoing light path of the conical reflector to collimate the first light and the second light.

9. A projection device, characterized in that, include: An optical modulation module, the optical modulation module including an optical modulator, the optical modulator being an LCOS; The lens system is a direct-projection lens or an ultra-short-throw lens; as well as The light source system as described in any one of claims 1-8.

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