Light source module, light-emitting device, lighting system and display equipment

Abstract

The utility model relates to a light source module, a light-emitting device, a lighting system and display equipment. In the first transflective component, a first polarization element can transmit the first polarization light and reflect the second polarization light, and a first transflective film can transmit the first light and reflect the second light and the third light; in the second transflective assembly, a second polarization element can transmit the first polarization state light and reflect the second polarization state light, and a second transflective film can transmit the second light and the third light and reflect the first light; the first polarization conversion mechanism is obliquely opposite to the first transflective component; the second polarization conversion mechanism is arranged between the second light source and the second transflective assembly; the third polarization conversion mechanism is arranged between the third light source and the second transmission and reflection assembly. The three polarization conversion mechanisms can convert the second polarization state light into the first polarization state light and reflect the first polarization state light. The light source module can improve light emitting efficiency and color uniformity.

Description

Technical Field

[0001] The present application relates to the field of polarization imaging technology, and in particular to a light source module, a light-emitting device, a lighting system, and a display device. Background Art

[0002] With the rapid development of polarization imaging technology, display devices such as AR devices and projectors often use optical engines that emit light in different polarization states, such as S-light or P-light. These engines, combined with liquid crystal on silicon (LCOS) chips, can achieve higher image quality. However, current optical engines capable of emitting polarized light have low light output efficiency and are prone to color shift, resulting in reduced display quality. Summary of the Invention

[0003] Based on this, it is necessary to provide a light source module, a light-emitting device, a lighting system and a display device to address the problem that the light output efficiency of the light machine is low and color deviation is prone to occur.

[0004] A light source module, comprising:

[0005] A first light source, configured to emit a first light;

[0006] a second light source, configured to emit a second light;

[0007] a third light source, configured to emit a third light, wherein the first light, the second light, and the third light have different colors;

[0008] a first transflective component, obliquely opposed to the first light source, and comprising a first polarizing element and a first transflective film, wherein the first polarizing element is capable of transmitting light of a first polarization state and reflecting light of a second polarization state, and the first transflective film is capable of transmitting the first light and reflecting the second light and the third light;

[0009] a second transflective component, obliquely opposed to the second light source and the third light source, and comprising a second polarizing element and a second transflective film, wherein the second polarizing element is capable of transmitting light of the first polarization state and reflecting light of the second polarization state, and the second transflective film is capable of transmitting the second light and the third light and reflecting the first light;

[0010] a first polarization conversion mechanism, disposed on the same side of the first transflective component as the first light source and obliquely opposite to the first transflective component, capable of converting light of the second polarization state from the first transflective component into light of the first polarization state and reflecting the light back to the first transflective component;

[0011] A second polarization conversion mechanism is disposed between the second light source and the second transmissive-reflective component. The second polarization conversion mechanism can convert the second-polarization-state light from the second transmissive-reflective component into first-polarization-state light and reflect it back to the second transmissive-reflective component; and,

[0012] A third polarization conversion mechanism is disposed between the third light source and the second transmissive-reflective component. The third polarization conversion mechanism can convert the second-polarization-state light from the second transmissive-reflective component into first-polarization-state light and reflect it back to the second transmissive-reflective component.

[0013] In the above light source module, the three light sources capable of emitting three different colors of light are independently arranged. The first transmissive-reflective component and the second transmissive-reflective component can mix and emit the first-polarization-state light among the lights emitted by the three light sources, and can also mix and emit the second-polarization-state light among the lights emitted by the three light sources after converting it into first-polarization-state light through the polarization mechanism. Thus, while the above light source module realizes the emission of the first-polarization-state light, it can make full use of the light components in the second polarization state, effectively improve the light utilization efficiency of the light source module, is beneficial to improving the display brightness and reducing the energy consumption, and can also realize the mixed emission of three different colors of light, enabling the three different colors of light to be coaxially emitted, improving the color uniformity of the emitted light, and effectively avoiding the color deviation phenomenon.

[0014] A light-emitting device includes a carrier and a plurality of light source modules as described in any one of the above embodiments. The plurality of light source modules are arranged in an array on the carrier.

[0015] A lighting system includes a modulation imaging module and a light source module as described in any one of the above embodiments. The modulation imaging module includes a beam splitting element and a reflective modulator. The beam splitting element is disposed on the light-emitting side of the light source module. The beam splitting element is used to conduct the light emitted by the light source module to the reflective modulator, and is used to receive and emit the light modulated by the reflective modulator.

[0016] A display device includes an imaging lens group and a lighting system as described above. The imaging lens group is disposed on the light-emitting side of the beam splitting element and is used to shape and emit the light emitted by the beam splitting element. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a light source module in some embodiments.

[0018] Figure 2 It is a schematic structural diagram of a light source module in some other embodiments.

[0019] Figure 3 It is a schematic structural diagram of a light source module in some still other embodiments.

[0020] Figure 4 Schematic structural diagram of a light source module using a transparent flat plate in some embodiments.

[0021] Figure 5 Schematic structural diagram of a light-emitting device in some embodiments.

[0022] Figure 6 Schematic structural diagram of a light-emitting device in some other embodiments.

[0023] Figure 7 Schematic structural diagram of a light-emitting device in still some other embodiments.

[0024] Figure 8 Schematic structural diagram of a light-emitting device in yet some other embodiments.

[0025] Figure 9 Schematic structural diagram of a display device in some embodiments.

[0026] Figure 10 Schematic structural diagram of a display device in some other embodiments.

[0027] Reference numerals:

[0028] 10. Light source module; 11. First light source; 12. Second light source; 13. Third light source; 14. First transmissive and reflective component; 141. First polarization element; 142. First transmissive and reflective film; 15. Second transmissive and reflective component; 151. Second polarization element; 152. Second transmissive and reflective film; 16. First polarization conversion mechanism; 161. First quarter-wave plate; 162. First reflection element; 17. Second polarization conversion mechanism; 171. Second quarter-wave plate; 172. First transmissive and reflective element; 18. Third polarization conversion mechanism; 181. Third quarter-wave plate; 182. Second transmissive and reflective element; 19. Collimating element; 21. First prism; 22. Second prism; 23. Third prism; 24. Transparent flat plate; 25. First color filter film; 26. Second color filter film; 30. Light-emitting device; 31. Carrier; 40. Lighting system; 41. Modulation imaging module; 411. Beam splitting element; 4111. Beam splitting surface; 412. Reflective modulator; 42. Light homogenizing element; 43. Relay lens group; 44. Half-wave plate; 50. Display device; 51. Imaging lens group; 52. Polarization conversion component; 521. Fourth quarter-wave plate; 522. Second reflection element. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0031] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or similar descriptions, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0035] Please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of the light source module 10 in some embodiments of the present application. The light source module 10 provided in the present application can be used to emit light rays in a polarized state, such as emitting light rays in a first polarization state. In the present application, the polarization planes of the light rays in the first polarization state and the second polarization state can be perpendicular to each other, and the polarization direction of one of the light rays in the first polarization state and the second polarization state is perpendicular to the polarization axis of the first polarization element 141 and the plane where the normal line of the reflection surface of the first polarization element 141 for this light ray is located, and is also perpendicular to the polarization axis of the second polarization element 151 and the plane where the normal line of the reflection surface of the second polarization element 151 for this light ray is located. For example, one of the light rays in the first polarization state and the second polarization state can be P light, and the other can be S light.

[0036] Combined with Figure 1 and Figure 9As shown in the figure, the light source module 10 provided in the present application can be used in any applicable display device 50 such as an AR device, a projection device, etc. In the display device 50, the light source module 10 can be used in cooperation with a reflective modulator 412 such as a liquid crystal on silicon chip. The first polarized light provided by the light source module 10 can cooperate with the reflective modulator 412 to achieve the reflection modulation effect of light, so that the reflective modulator 412 can modulate the light by adjusting the arrangement of liquid crystal molecules to form an image, thereby performing display or projection. In the present application, the light source module 10 can be regarded as an optical engine in the display device 50. Of course, the application of the light source module 10 is not limited to the description in the present application. The light source module 10 can also be used in other any applicable scenarios that require polarized light for illumination, projection or display. In the present application, the application scenario of the light source module 10 is not limited.

[0037] Reference Figure 1 As shown in the figure, in some embodiments, the light source module 10 includes a first light source 11, a second light source 12, and a third light source 13. The first light source 11, the second light source 12, and the third light source 13 are respectively used to emit a first light, a second light, and a third light. The first light, the second light, and the third light have different colors, and the first light, the second light, and the third light can be mixed to form white light, so that the light emitted by the light source module 10 can meet the requirements of illumination, display, or projection. That is to say, the colors of the first light, the second light, and the third light can constitute the three primary colors. For example, the first light can be one of red light, green light, and blue light, and the second light and the third light can be the other two of red light, green light, and blue light. In the present application, the wavelength of red light can be 600nm - 700nm, the wavelength of green light can be 500nm - 600nm, and the wavelength of blue light can be 400nm - 500nm.

[0038] The light source module 10 further includes a first transmissive and reflective component 14 and a second transmissive and reflective component 15 having optical selective transmissive and reflective functions. The first transmissive and reflective component 14 is inclined relative to the first light source 11, that is to say, the first transmissive and reflective component 14 is inclined to the main light ray emission direction of the first light source 11, and the light rays emitted by the first light source 11 can reach the first transmissive and reflective component 14. The first transmissive and reflective component 14 includes a first polarization element 141 and a first transmissive and reflective film 142. The first polarization element 141 can transmit light rays in the first polarization state and reflect light rays in the second polarization state. The first transmissive and reflective film 142 can transmit the first light rays and reflect the second light rays and the third light rays. The second transmissive and reflective component 15 is inclined relative to the second light source 12 and the third light source 13, that is to say, the second transmissive and reflective component 15 is inclined to the main light ray emission directions of the second light source 12 and the third light source 13, and the light rays emitted by the second light source 12 and the third light source 13 can both reach the second transmissive and reflective component 15. The second transmissive and reflective component 15 includes a second polarization element 151 and a second transmissive and reflective film 152. The second transmissive and reflective film 152 can transmit the second light rays and the third light rays and reflect the first light rays. It can be understood that the first polarization element 141 and the second polarization element 151 are polarization state selective transmissive and reflective elements, which can transmit the light ray components in the first polarization state and reflect the light ray components in the second polarization state. The first transmissive and reflective film 142 and the second transmissive and reflective film 152 belong to wavelength selective transmissive and reflective elements, which can transmit the light rays of the corresponding color wavelengths and reflect the light rays of other color wavelengths. It should be noted that in the present application, the main light ray emission direction of the light source can be perpendicular to the light emitting surface of the light source. The main light ray can be understood as the light ray emitted from the central area of the light emitting surface of the light source and perpendicular to the light emitting surface of the light source.

[0039] The cooperation of the first transmissive and reflective component 14 and the second transmissive and reflective component 15 can emit the light ray components in the first polarization state among the first light rays emitted by the first light source 11, the second light rays emitted by the second light source 12, and the third light rays emitted by the third light source 13. For example, in combination with Figure 1 and Figure 2 As shown, in some embodiments, the side of the first transmissive and reflective component 14 facing away from the first light source 11 and the side of the second transmissive and reflective component 15 facing away from the second light source 12 are opposite, and the first transmissive and reflective component 14 and the second transmissive and reflective component 15 are perpendicular to each other. The second transmissive and reflective component 15 forms a 45° angle with the main light ray emission directions of both the second light source 12 and the third light source 13. The light ray components in the first polarization state in the light rays emitted by one of the second light source 12 and the third light source 13 can directly pass through the second transmissive and reflective component 15 and be emitted. The light ray components in the first polarization state in the light rays emitted by the other one can pass through the second transmissive and reflective component 15 and reach the first transmissive and reflective component 14, and then be reflected by the first transmissive and reflective component 14 and emitted. In combination with Figure 1 and Figure 3As shown, in some embodiments, the first transmissive-reflective component 14 forms a 45° angle with the main light ray emission direction of the first light source 11. Among the light rays emitted by the first transmissive-reflective component 14, the first light rays in the first polarization state are emitted after passing through the first transmissive-reflective component 14, or pass through the first transmissive-reflective component 14 and reach the second transmissive-reflective component 15, and then are reflected by the second transmissive-reflective component 15 and emitted.

[0040] In some embodiments, the light source module 10 further includes a first polarization conversion mechanism 16, a second polarization conversion mechanism 17, and a third polarization conversion mechanism 18. The first polarization conversion mechanism 16 and the first light source 11 are disposed on the same side of the first transmissive-reflective component 14 and are inclined relative to the first transmissive-reflective component 14. The first polarization conversion mechanism 16 can convert the second polarization state light rays from the first transmissive-reflective component 14 into first polarization state light rays and reflect them back to the first transmissive-reflective component 14. Combining Figure 1 and Figure 3 As shown, the first transmissive-reflective component 14 can form a 45° angle with both the first light source 11 and the first polarization conversion mechanism 16. The light ray component in the second polarization state in the light rays emitted by the first light source 11 can be reflected by the first transmissive-reflective component 14 onto the first polarization conversion mechanism 16, and then be converted by the first polarization conversion mechanism 16 into first polarization state light rays and reflected back onto the first transmissive-reflective component 14, and then pass through the first transmissive-reflective component 14 and be emitted, or pass through the first transmissive-reflective component 14 and reach the second transmissive-reflective component 15, and be reflected by the second transmissive-reflective component 15 and emitted.

[0041] The second polarization conversion mechanism 17 is disposed between the second light source 12 and the second transmissive-reflective component 15. The second polarization conversion mechanism 17 can transmit the second light rays emitted by the second light source 12, and can convert the second polarization state light rays from the second transmissive-reflective component 15 into first polarization state light rays and reflect them back to the second transmissive-reflective component 15. The third polarization conversion mechanism 18 is disposed between the third light source 13 and the second transmissive-reflective component 15. The third polarization conversion mechanism 18 can convert the second polarization state light rays from the second transmissive-reflective component 15 into first polarization state light rays and reflect them back to the second transmissive-reflective component 15. Combining Figure 1 and Figure 2As shown, when the second transmissive-reflective component 15 forms a 45° angle with the main light ray emission directions of both the second light source 12 and the third light source 13, the second light rays in the second polarization state among the light rays emitted by the second light source 12 can be reflected by the second transmissive-reflective component 15 onto the third polarization conversion mechanism 18, and thus be converted by the third polarization conversion mechanism 18 into light rays in the first polarization state and then be reflected back to the second transmissive-reflective component 15, and then exit through the second transmissive-reflective component 15, or be incident on the first transmissive-reflective component 14 through the second transmissive-reflective component 15, and then exit after being reflected by the first transmissive-reflective component 14. The third light rays in the second polarization state among the light rays emitted by the third light source 13 can be reflected by the second transmissive-reflective component 15 onto the second polarization conversion mechanism 17, and thus be converted by the second polarization conversion mechanism 17 into light rays in the first polarization state and then be reflected back to the second transmissive-reflective component 15, and then exit through the second transmissive-reflective component 15, or be incident on the first transmissive-reflective component 14 through the second transmissive-reflective component 15, and then exit after being reflected by the first transmissive-reflective component 14.

[0042] For the above light source module 10, the three light sources that can emit three different colors of light rays are independently arranged, and the settings between the three light sources will not interfere with each other, which can increase the light-emitting area of each light source. Moreover, the first transmissive-reflective component 14 and the second transmissive-reflective component 15 can mix and emit the light rays in the first polarization state among the light rays emitted by the three light sources, and can also mix and emit the light rays in the second polarization state among the light rays emitted by the three light sources after converting them into light rays in the first polarization state through the polarization mechanism. Thus, while the above light source module 10 realizes the emission of light rays in the first polarization state, it can make full use of the light ray components in the second polarization state, effectively improve the light utilization efficiency of the light source module 10, is conducive to improving the display brightness and reducing the energy consumption, and at the same time can also realize the mixed emission of three different colors of light rays, enabling the three different colors of light rays to be coaxially emitted, improving the color uniformity of the emitted light rays, and effectively avoiding the color deviation phenomenon.

[0043] In Figures 1-4In the illustrated embodiments, taking the light of the first polarization state as P light and the light of the second polarization state as S light as examples, both the first polarization element 141 and the second polarization element 151 are polarization state selective transmissive and reflective elements that can transmit P light and reflect S light. In some embodiments, the first light source 11 is a red light source, the first light is red light, the second light source 12 is a green light source, the second light is green light, the third light source 13 is a blue light source, and the third light is blue light. Then, the first transmissive and reflective film 142 can be a wavelength selective transmissive and reflective film that can transmit red light and reflect green light and blue light, and the second transmissive and reflective film 152 can be a wavelength selective transmissive and reflective film that can transmit green light and blue light and reflect red light. The green light source and the blue light source are inclined relative to the second transmissive and reflective component 15 together. Since the wavelengths of green light and blue light are closer, it is beneficial to reduce the design and preparation difficulty of the first transmissive and reflective film 142 and the second transmissive and reflective film 152, and improve the transmittance and reflectance of the first transmissive and reflective film 142 and the second transmissive and reflective film 152 for the corresponding light, thereby being beneficial to improving the light utilization efficiency of the light source module 10. Of course, according to different display and projection requirements, the color types of the light emitted by each light source, as well as the first polarization state light and the second polarization state light, can also have other settings, and then the first transmissive and reflective component 14 and the second transmissive and reflective component 15 can be adjusted accordingly as long as the corresponding optical path can be realized. For example, in Figure 9 the illustrated embodiments, taking the light of the first polarization state as S light and the light of the second polarization state as P light as an example.

[0044] In some embodiments, the main light emission directions of the second light source 12 and the third light source 13 are perpendicular to each other, the main light emission direction of the first light source 11 is parallel to the main light emission direction of one of the second light source 12 and the third light source 13, and perpendicular to the main light emission direction of the other.

[0045] The specific optical path design of the light source module 10 will be elaborated in the following description. It can be understood that different layouts of the components in the light source module 10 correspond to different optical path designs. Figures 1-3 Optical path diagrams of the light source module 10 under three different component layouts are respectively shown. Of course, the layouts of the components of the light source module 10 are not limited to this. As long as the light of the first polarization state in the light emitted by the first light source 11, the second light source 12, and the third light source 13 can be emitted, and the light of the second polarization state can be converted into the light of the first polarization state and emitted to improve the light utilization efficiency, and at the same time, the first light, the second light, and the third light can be coaxially mixed and emitted to improve the color uniformity.

[0046] Please refer to Figure 1In some embodiments, the first light source 11 and the second light source 12 are located on opposite sides of the first transflective component 14 and the second transflective component 15. In the direction from the first light source 11 to the second light source 12, the first light source 11, the first transflective component 14, the second transflective component 15, and the second light source 12 are arranged in sequence. The third light source 13 and the first polarization conversion mechanism 16 are located on the same side of the line connecting the first light source 11 and the second light source 12. In this embodiment, the first light emitted by the first light source 11 is incident on the first transflective component 14. The first light in the first polarization state passes through the first transflective component 14 and is incident on the second transflective component 15. It is then reflected by the second transflective film 152 and then emitted. The second polarization state is reflected by the first polarization element 141 and is incident on the first polarization conversion mechanism 16. The light is then converted by the first polarization conversion mechanism 16 into the second polarization state and is then incident on the first transflective component 14. The light then passes through the first transflective component 14 and is emitted. The second light emitted by the second light source 12 strikes the second transflective element 15. The second light in the first polarization state passes through the second transflective element 15 and strikes the first transflective element 14. It is then reflected by the first transflective film 142 and emitted. The second polarization state is reflected by the second polarization element 151 and strikes the third polarization conversion mechanism 18. It is converted by the third polarization conversion mechanism 18 into the first polarization state and then strikes the second transflective element 15. The third light emitted by the third light source 13 strikes the second transflective element 15. The first polarization state is then transmitted through the second transflective element 15 and emitted. The third light in the second polarization state is reflected by the second polarization element 151 and strikes the second polarization conversion mechanism 17. It is converted by the second polarization conversion mechanism 17 into the first polarization state and then strikes the second transflective element 15. It then passes through the second transflective element 15 and strikes the first transflective element 14. It is then reflected by the first transflective film 142 and emitted.

[0047] It can be seen that through the cooperation of the first transflective component 14, the second transflective component 15, the first polarization conversion mechanism 16 and the second polarization conversion mechanism 17, the first polarization state light in the first light, the second light and the third light can be mixed and emitted, and the second polarization state light can be converted into the first polarization state light and mixed and emitted, and the three light at each exit position are mixed and emitted coaxially, effectively improving the light utilization efficiency and color uniformity of the light source module 10. It should be noted that Figures 1-4Among them, both PR1 and PR2 represent the first light rays in the first polarization state, SR1 represents the first light ray in the second polarization state, both PG1 and PG2 represent the second light rays in the first polarization state, SG1 represents the second light ray in the second polarization state, both PB1 and PB2 represent the third light rays in the first polarization state, and SB1 represents the third light ray in the second polarization state. PR1, PR2, PG1, PG2, PB1, and PB2 are all light rays in the first polarization state, and SR1, SG1, and SB1 are all light rays in the second polarization state.

[0048] Reference Figure 2 As shown Figure 2 In the illustrated embodiment compared to Figure 1 In terms of this, only the positions of the second light source 12 and the third light source 13 are swapped. Then, the first light source 11 and the third light source 13 are located on the opposite sides of the first transmissive-reflective component 14 and the second transmissive-reflective component 15, and the second light source 12 and the first polarization conversion mechanism 16 are located on both sides in the direction of the line connecting the first light source 11 and the third light source 13. In this embodiment, the optical path of the first light ray is the same as that of Figure 1 In the illustrated embodiment. The difference is that the second light ray emitted by the second light source 12 hits the second transmissive-reflective component 15. Among them, the light ray in the first polarization state passes through the second transmissive-reflective component 15 and exits. Among them, the second light ray in the second polarization state is reflected by the second polarization element 151 onto the third polarization conversion mechanism 18, and is converted by the third polarization conversion mechanism 18 into a light ray in the first polarization state and reflected back onto the second transmissive-reflective component 15, and then passes through the second transmissive-reflective component 15 and hits the first transmissive-reflective component 14, and then is reflected by the first transmissive-reflective film 142 and exits. The third light ray emitted by the third light source 13 hits the second transmissive-reflective component 15. Among them, the third light ray in the first polarization state passes through the second transmissive-reflective component 15 and hits the first transmissive-reflective component 14, and is thus reflected by the first transmissive-reflective film 142 and exits; among them, the light ray in the second polarization state is reflected by the second polarization element 151 onto the second polarization conversion mechanism 17, and is converted by the second polarization conversion mechanism 17 into a light ray in the first polarization state and reflected back to the second transmissive-reflective component 15, and thus passes through the second transmissive-reflective component 15 and exits.

[0049] Please refer to Figure 3 , Figure 3 In the illustrated embodiment relative to Figure 1 In terms of this, only the positions of the first light source 11 and the first polarization conversion mechanism 16 are swapped. Then, the second light source 12 and the first polarization conversion mechanism 16 are located on the opposite sides of the first transmissive-reflective component 14 and the second transmissive-reflective component 15, and the first light source 11 and the third light source 13 are located on the same side in the direction of the line connecting the first light source 11 and the first polarization conversion mechanism 16. In this embodiment, the optical path designs of the second light ray and the third light ray are the same as those of Figure 1It is the same as the illustrated embodiment, except that the first light rays emitted by the first light source 11 are incident on the first transmissive-reflective component 14. Among them, the first light rays in the first polarization state pass through the first transmissive-reflective component 14 and are emitted. Among them, the first light rays in the second polarization state are reflected by the first polarization element 141 onto the first polarization conversion mechanism 16, and are converted by the first polarization conversion mechanism 16 into the first light rays in the first polarization state and reflected back to the first transmissive-reflective component 14, so as to pass through the first transmissive-reflective component 14 and be incident on the second transmissive-reflective component 15, and then are reflected by the second transmissive-reflective film 152 and emitted.

[0050] Of course, in Figure 3 the illustrated embodiment, the positions of the second light source 12 and the third light source 13 can also be swapped. Then, the third light source 13 and the second polarization conversion mechanism 17 are located on the opposite sides of the first transmissive-reflective component 14 and the second transmissive-reflective component 15. The corresponding structures and optical path designs can be obtained with reference to the above description, and will not be elaborated here.

[0051] In some embodiments, the first polarization element 141 is disposed on the side of the first transmissive-reflective film 142 facing the first light source 11, and the second polarization element 151 is disposed on the side of the second transmissive-reflective film 152 facing the second light source 12 and the third light source 13. Thus, the second polarization state light rays incident on the transmissive-reflective component can be reflected by the polarization element without passing through the transmissive-reflective film, and the first polarization state light rays incident on the side of the transmissive-reflective film facing away from the polarization element can be reflected by the transmissive-reflective film without passing through the polarization element, which can reduce the number of structures that the light rays pass through in the light source module 10, is beneficial to reducing the loss of light rays, and improving the light output efficiency of the light source module 10.

[0052] In some embodiments, the light source module 10 may further include three collimating elements 19, which are respectively disposed between the first light source 11 and the first transmissive-reflective component 14, between the second light source 12 and the second polarization conversion mechanism 17, and between the third light source 13 and the third polarization conversion mechanism 18. The collimating element 19 includes, but is not limited to, a convex lens, a lens group composed of multiple lenses, or a Fresnel lens, etc.

[0053] In some embodiments, the first polarization conversion mechanism 16 includes a first quarter-wave plate 161 and a first reflection element 162 disposed on the side of the first quarter-wave plate 161 facing away from the first transmissive and reflective component 14. The first reflection element 162 includes, but is not limited to, a mirror. The second-polarization-state light from the first transmissive and reflective component 14 passes through the first quarter-wave plate 161 and then hits the first reflection element 162. After being reflected by the first reflection element 162, it passes through the first quarter-wave plate 161 again and is converted into first-polarization-state light. The second polarization conversion mechanism 17 includes a second quarter-wave plate 171 and a first transmissive and reflective element 172 disposed between the second quarter-wave plate 171 and the second light source 12. The first transmissive and reflective element 172 can transmit the second light and reflect the third light. The first transmissive and reflective element 172 can be a selective transmissive film layer or other optical structure that can transmit green light and reflect blue light. The second light emitted by the second light source 12 passes through the first polarization conversion mechanism 16 and hits the second transmissive and reflective component 15. The third light in the second polarization state from the second transmissive and reflective component 15 passes through the second quarter-wave plate 171 and hits the first transmissive and reflective element 172. After being reflected by the first transmissive and reflective element 172, it passes through the second quarter-wave plate 171 again and is converted into first-polarization-state light and hits the second transmissive and reflective component 15. The third polarization conversion mechanism 18 includes a third quarter-wave plate 181 and a second transmissive and reflective element 182 disposed between the third quarter-wave plate 181 and the third light source 13. The second transmissive and reflective element 182 can transmit the third light and reflect the second light source 12. For example, it can be a selective transmissive film layer or other optical structure that can transmit blue light and reflect green light. The optical path design corresponding to the third polarization conversion mechanism 18 can be obtained by referring to the second polarization conversion mechanism 17.

[0054] Please refer to again Figure 1, in some embodiments, the light source module 10 includes a first prism 21, a second prism 22, and a third prism 23. The first prism 21, the second prism 22, and the third prism 23 are all right-angled prisms, each having two mutually perpendicular and connected right-angled faces, and an inclined face connecting the two right-angled faces. The two right-angled faces of the third prism 23 are respectively opposite to the inclined faces of the first prism 21 and the second prism 22. One of the first polarization element 141 and the first dichroic film 142 is disposed on the inclined face of the first prism 21, and the other is disposed on the right-angled face of the third prism 23 opposite to the first prism 21. One of the second polarization element 151 and the second dichroic film 152 is disposed on the inclined face of the second prism 22, and the other is disposed on the right-angled face of the third prism 23 opposite to the second prism 22. The third prism 23 can be glued to the first prism 21 and the second prism 22. Setting three glued right-angled prisms as the carrier structure of the first dichroic assembly 14 and the second dichroic assembly 15 is beneficial to improving the assembly accuracy and structural reliability of the first dichroic assembly 14 and the second dichroic assembly 15. It can be understood that when the light source module 10 is provided with three right-angled prisms, the inclined face of the third prism 23 can be regarded as the light-emitting surface of the light source module 10.

[0055] Referring to Figure 4 As shown, in some other embodiments, the light source module 10 can also be provided with two light-transmitting flat plates 24 as the carrier structure of the first dichroic assembly 14 and the second dichroic assembly 15. The light-transmitting flat plates 24 can be glass flat plates. The two light-transmitting flat plates 24 are perpendicular to each other. The first polarization element 141 and the first dichroic film 142 are respectively disposed on the opposite sides of one of the light-transmitting flat plates 24, and the second polarization element 151 and the second dichroic film 152 are respectively disposed on the opposite sides of the other light-transmitting flat plate 24. The two light-transmitting flat plates 24 can be assembled through structures such as brackets. Setting the light-transmitting flat plates 24 as the carrier structure is beneficial to reducing the path of light passing through the glass or plastic medium, reducing the loss of light, and thus improving the light output efficiency.

[0056] Please refer to Figure 1 As shown, although the light source module 10 provided in the present application can mix and emit the first light, the second light, and the third light of different colors coaxially to improve the color uniformity, the intensity of the light emitted from different positions may be different due to different optical paths, which may affect the color uniformity. For example, in Figure 1 In the shown embodiment, among the light rays PR1, PG2, and PB1 emitted from the second dichroic assembly 15, the optical path of PB1 is shorter, and the optical path of PG2 is longer. The intensity of the light ray PB1 is greater than that of PG2, which may affect the color uniformity. Among the light rays PR2, PG1, and PB2 emitted from the first dichroic assembly 14, the optical path of PG1 is shorter, and the optical path of PB2 is longer. The intensity of the light ray PG1 is greater than that of PB2, which may affect the color uniformity.

[0057] To avoid the influence of optical path on color uniformity, in some embodiments, the light source module 10 includes a first color filter film 25 and a second color filter film 26. The first color filter film 25 is disposed on the light-emitting side of the first transmissive and reflective component 14, and the second color filter film 26 is disposed on the light-emitting side of the second transmissive and reflective component 15. When the light source module 10 includes three right-angled prisms, the first color filter film 25 can be disposed at the position of the inclined surface of the third prism 23 corresponding to the first transmissive and reflective component 14, and the second color filter film 26 can be disposed at the position of the inclined surface of the third prism 23 corresponding to the second transmissive and reflective component 15. The first color filter film 25 is used to reduce the intensity of the light ray with the highest intensity among the first light ray, the second light ray, and the third light ray emitted from the first transmissive and reflective component 14, and the second color filter film 26 is used to reduce the intensity of the light ray with the highest intensity among the first light ray, the second light ray, and the third light ray emitted from the second transmissive and reflective component 15. For example, in Figure 1 In the illustrated embodiment, the first color filter film 25 can be used to reduce the brightness of the second light ray. That is to say, the transmittance of the first color filter film 25 to the second light ray is less than the transmittance to the third light ray, so as to reduce the intensity difference between the second light ray and the third light ray. The second color filter film 26 can be used to reduce the intensity of the third light ray. That is to say, the transmittance of the second color filter film 26 to the third light ray is less than the transmittance to the second light ray, so as to reduce the intensity difference between the second light ray and the third light ray. Thus, the first color filter film 25 and the second color filter film 26 can improve the intensity uniformity of different color light rays in the light rays emitted from the corresponding positions, thereby improving the color uniformity of the light rays emitted from the light source module 10 and improving the display or projection quality. Figure 2 And Figure 3 In the illustrated embodiments, the first color filter film 25 and the second color filter film 26 can also be provided. The transmittance difference of the first color filter film 25 and the second color filter film 26 for different color light rays can be adaptively set according to the optical path of different color light rays, which will not be elaborated here.

[0058] Combined with Figure 3 And Figure 5 As shown, Figure 5 FIG. shows a schematic structural diagram of the light-emitting device 30 in some embodiments. The present application also provides a light-emitting device 30 including a plurality of light source modules 10 as described in any of the above embodiments. The light-emitting device 30 further includes a carrier 31, and the plurality of light source modules 10 are arranged in an array on the carrier 31. Figure 5 The light-emitting device 30 in the illustrated embodiment can adopt Figure 3 The light source module 10 in the illustrated embodiment, in Figure 5In the figure, the third light source 13 and the first light source 11 are schematically shown in dashed lines. Of course, the light source module 10 in the light-emitting device 30 may also adopt the light source module 10 in any of the above other embodiments. A plurality of light source modules 10 arranged in an array are provided in the light-emitting device 30. The plurality of light source modules 10 can emit light simultaneously, effectively improving the display brightness and meeting the high-power display requirements. At the same time, different light source modules 10 can emit light separately, or the light-emitting powers of the first light source 11, the second light source 12, and the third light source 13 in different light source modules 10 can be different, enabling local display, or different display brightnesses at different positions, or different light intensity of different colors, etc., to meet a variety of different dimming requirements.

[0059] Combined with Figure 5 and Figure 6 As shown, taking the first transmissive-reflective component 14 as an array unit and the second transmissive-reflective component 15 as an array unit, the first transmissive-reflective component 14 and the second transmissive-reflective component 15 can be jointly arranged in a 2×2 array. Then, the light-emitting device 30 includes two light source modules 10 arranged in an array. The first transmissive-reflective component 14 and the second transmissive-reflective component 15 can also be jointly arranged in a 4×4 array. Then, the light-emitting device 30 includes eight light source modules 10 arranged in an array. Of course, the first transmissive-reflective component 14 and the second transmissive-reflective component 15 can also be jointly arranged in an 8×8 or other array arrangements, and the number of light source modules 10 can also have other settings, which can be specifically designed according to display or projection requirements.

[0060] Combined with Figure 5 and Figure 6 As shown, in some embodiments, in the array formed by a plurality of light source modules 10, any first transmissive-reflective component 14 is adjacent to the first transmissive-reflective components 14 and the second transmissive-reflective components 15 of other light source modules 10 in the first direction and the second direction respectively. That is to say, in different light source modules 10, the directions in which the first transmissive-reflective component 14 points to the second transmissive-reflective component 15 are parallel to each other, which can be regarded as the same arrangement direction of the plurality of light source modules 10. The first direction and the second direction can be two mutually perpendicular directions on a plane. For example, the first direction and the second direction can be the horizontal and vertical directions of the array in which the light source modules 10 are arranged respectively.

[0061] Combined with Figure 7 and Figure 8As shown, in some other embodiments, any first transmissive-reflective component 14 is adjacent to the second transmissive-reflective component 15 of other light source modules 10 in both the first direction and the second direction. That is to say, the arrangement directions of two adjacent light source modules 10 are opposite. In other words, the direction in which the first transmissive-reflective component 14 of one light source module 10 points to the second transmissive-reflective component 15 is parallel and opposite to the direction in which the first transmissive-reflective component 14 of the adjacent light source module 10 points to the second transmissive-reflective component 15. With such an arrangement, when there is a deviation in the color uniformity of the mixed light emitted by the first transmissive-reflective component 14 and the second transmissive-reflective component 15 in the light source module 10, the mixing of the light emitted by two adjacent light source modules 10 can compensate for the difference in color uniformity, effectively improving the color uniformity and display quality of the overall light output of the light-emitting device 30.

[0062] Combined with Figure 1 and Figure 9 As shown, the present application further provides an illumination system 40, including a modulation imaging module 41 and the light source module 10 as described in any of the above embodiments. The modulation imaging module 41 includes a beam splitting element 411 and a reflective modulator 412. The beam splitting element 411 is disposed on the light-emitting side of the light source module 10. The beam splitting element 411 is used to conduct the light emitted by the light source module 10 to the reflective modulator 412, so that the reflective modulator 412 can modulate the light to form an image. The beam splitting element 411 is also used to conduct and emit the light reflected and modulated by the reflective modulator 412. It should be noted that in the illumination system 40, a single light source module 10 can be used as the light source, or an array composed of multiple light source modules 10 can be used as the light source. That is, in the illumination system 40, the light source module 10 described in any of the above embodiments can be used, or the light-emitting device 30 including an array of multiple light source modules 10 described in any of the above embodiments can be used. Using the light-emitting device 30 can enable the illumination system 40 to have a richer dimming function, thereby meeting different display and projection requirements.

[0063] In some embodiments, the lighting system 40 further includes a light homogenizing element 42 disposed between the light source module 10 and the beam splitting element 411. The light homogenizing element 42 includes, but is not limited to, a compound eye lens, a microlens array, a Fresnel lens, etc. The light homogenizing element 42 can diffuse and homogenize the light emitted by the light source module 10, improving the uniformity of the light. For example, it can convert the Gaussian-distributed light into more uniform light to achieve Köhler illumination, so as to improve the light quality of the lighting system 40. In some embodiments, the lighting system 40 may further include a relay lens group 43 disposed between the light homogenizing element 42 and the beam splitting element 411, for example, on the side of the beam splitting element 411 facing the light source module 10. The relay lens group 43 may include one or more lenses with optical power, and can be specifically designed according to the light adjustment requirements. The relay lens group 43 can adjust the light, improving the incident angle of the light on the beam splitting element 411, thereby enhancing the light output efficiency.

[0064] The light reflected and modulated by the reflective modulator 412 can be directly output for display or projection after being conducted by the beam splitting element 411, or can be converted or shaped through other optical mechanisms. For example, the present application also provides a display device 50, including an imaging lens group 51 and the lighting system 40 as described in any of the above embodiments. The imaging lens group 51 is disposed on the light output side of the beam splitting element 411 and is used to shape and output the light emitted by the beam splitting element 411. The imaging lens group 51 may include one or more lenses with optical power. The light modulated by the reflective modulator 412 is output through the imaging lens group 51 after being conducted by the beam splitting element 411. The shaping effect of the imaging lens group 51 can improve the display or projection quality of the light, and the specific setting of the imaging lens group 51 can be designed according to the display or projection quality requirements.

[0065] Further, in some embodiments, the beam splitting element 411 has a beam splitting surface 4111, and the beam splitting surface 4111 can reflect light rays in the first polarization state and transmit light rays in the second polarization state. For example, the beam splitting element 411 may include two glued right-angle prisms, the inclined surfaces of the two right-angle prisms face each other and are glued together, the beam splitting element 411 further includes a polarization element disposed between the two right-angle prisms, the polarization element can reflect light rays in the first polarization state and transmit light rays in the second polarization state, and the beam splitting surface 4111 is defined by the polarization element. In other embodiments, the beam splitting element 411 may also include a light-transmitting element such as a glass plate or a plastic plate and a polarization element disposed on the light-transmitting element, and the beam splitting surface 4111 is also defined by the polarization element. The display device 50 further includes a polarization conversion assembly 52, and the polarization conversion assembly 52 can convert the light rays in the second polarization state from the beam splitting surface 4111 into light rays in the first polarization state and reflect them back to the beam splitting surface 4111. The polarization conversion assembly 52 and the reflective modulator 412 are respectively disposed on two opposite sides of the beam splitting element 411, the imaging lens group 51 is disposed on a side of the beam splitting element 411 facing away from the light source module 10, one side of the beam splitting surface 4111 is inclined relative to the light source module 10 and the reflective modulator 412, and the other side is inclined relative to the polarization conversion assembly 52 and the imaging lens group 51.

[0066] In some embodiments, the light source module 10 and the imaging lens group 51 may be coaxially arranged, and the beam splitting surface 4111 may form an angle of 45° with the main light ray emission direction of the light source module 10, the extension direction of the reflective modulator 412, the extension direction of the polarization conversion assembly 52, and the axis of the imaging lens group 51. It can be understood that in this embodiment, the light rays in the first polarization state (light ray S1) emitted from the light source module 10 sequentially pass through the light homogenizing element 42 and the relay lens group 43 and then enter the beam splitting element 411 and reach the beam splitting surface 4111, are reflected by the beam splitting surface 4111 onto the reflective modulator 412, and thus are modulated by the reflective modulator 412 and converted into light rays in the second polarization state (light ray P1) and reflected back to the beam splitting surface 4111. The light ray P1 passes through the beam splitting surface 4111 and reaches the polarization conversion assembly 52, is converted into light rays in the first polarization state (light ray S2) by the polarization conversion assembly 52 and reflected back to the beam splitting surface 4111, and then is reflected by the beam splitting surface 4111 onto the imaging lens group 51 and exits after being adjusted by the imaging lens group 51. Thus, through the cooperation of the beam splitting element, the reflective modulator 412, and the polarization conversion assembly 52, it is possible to make the main light ray emission direction of the imaging lens group 51 still the same as the main light ray emission direction of the light source module 10 after the light rays emitted by the light source module 10 are reflected and modulated by the reflective modulator 412, which is beneficial to compressing the size of the light source module 10 in the direction perpendicular to the axis of the imaging lens group 51 to adapt to different structural layouts.

[0067] The setting of the polarization conversion component 52 may be the same as the setting of the first polarization conversion mechanism 16 described above. The polarization conversion component 52 may include a fourth quarter-wave plate 521 and a second reflection element 522 disposed on the back of the fourth quarter-wave plate 521 facing away from the beam splitting element 411, as long as it can reflect and convert the second polarization state light into the first polarization state light.

[0068] In Figure 9 the illustrated embodiment, the first polarization state light is S light, and the second polarization state light is P light. In other embodiments, the first polarization state light may also be P light, and the second polarization state light is S light. Please refer to Figure 10 as shown. In other embodiments, when the first polarization element 141, the second polarization element 151, and the beam splitting surface 4111 have a high transmittance for P light and a high reflectance for S light, if the first polarization state light is P light and the second polarization state light is S light, the illumination system 40 may further include a half-wave plate 44 disposed between the beam splitting element 411 and the light source module 10. The half-wave plate 44 may be disposed between the light homogenizing element 42 and the light source module 10. The half-wave plate 44 is used to convert the first polarization state light emitted by the light source module 10 into the second polarization state light, for example, convert P light into S light, which can adapt to the transmittance and reflectance design of the first polarization element 141, the second polarization element 151, and the beam splitting surface 4111 for light, and improve the light utilization efficiency.

[0069] Of course, since the polarization planes of P light and S light are perpendicular to each other, when the light source module 10 rotates 90° relative to the beam splitting element 411 around the light emitting direction of the light source module 10, the first polarization state light emitted by the light source module 10 can be switched between P light and S light, thereby changing the polarization state of the emitted first polarization state light. For example, by rotating the light source module 10 90° relative to the beam splitting element 411 to switch the first polarization state light from P light to S light, it can not only adapt to the transmittance and reflectance design of the first polarization element 141, the second polarization element 151, and the beam splitting surface 4111 for light, improve the light utilization efficiency, but also save the setting cost of the half-wave plate 44, which is beneficial to the miniaturization design of the display device 50.

[0070] In Figure 10 the illustrated embodiment, the setting of the polarization conversion component 52 may be the same as that in Figure 9 the illustrated embodiment. The beam splitting surface 4111 can reflect the second polarization state light and transmit the first polarization state light. The polarization conversion component 52 can convert the first polarization state light from the beam splitting surface 4111 into the second polarization state light and reflect it back to the beam splitting surface 4111. It can be understood that in Figure 10In the embodiment shown, the first polarized light (light ray P2) emitted from the light source module 10 is converted into the second polarized light (light ray S3) when passing through the half-wave plate 44, and then sequentially passes through the light homogenizing element 42 and the relay lens group 43 and is incident on the beam splitting surface 4111. It is reflected by the beam splitting surface 4111 onto the reflective modulator 412, and thus is modulated by the reflective modulator 412 into the first polarized light (light ray P3) and reflected back onto the beam splitting surface 4111. The light ray P3 passes through the beam splitting surface 4111 and hits the polarization conversion component 52, and is converted by the polarization conversion component 52 into the second polarized light (light ray S4) and reflected back onto the beam splitting surface 4111, and then is reflected by the beam splitting surface 4111 onto the imaging lens group 51 and exits after being adjusted by the imaging lens group 51. With such a setting, it is beneficial to improve the adaptability of the first polarization element 141, the second polarization element 151, and the beam splitting surface 4111 to the transmitted and reflected light, and improve the transmittance and reflectance of the first polarization element 141, the second polarization element 151, and the beam splitting surface 4111 to the corresponding light rays, thereby being beneficial to improving the light utilization efficiency of the display device 50.

[0071] Of course, only some examples of the first polarized light and the second polarized light are given in the above embodiments. Based on Figure 9 or Figure 10 the structural design shown in any of the embodiments, the first polarized light includes but is not limited to any one of P light and S light, and the second polarized light may be the other one of P light and S light. When the types of the first polarized light and the second polarized light change, the corresponding optical path can still be obtained from the above description.

[0072] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0073] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A light source module, characterized in that, Comprising: A first light source for emitting a first light ray; A second light source for emitting a second light ray; A third light source for emitting a third light ray, wherein the first light ray, the second light ray and the third light ray have different colors; A first transmissive-reflective component, which is inclined relative to the first light source and includes a first polarization element and a first transmissive-reflective film. The first polarization element can transmit light rays in a first polarization state and reflect light rays in a second polarization state, and the first transmissive-reflective film can transmit the first light ray and reflect the second light ray and the third light ray; A second transmissive-reflective component, which is inclined relative to the second light source and the third light source and includes a second polarization element and a second transmissive-reflective film. The second polarization element can transmit light rays in a first polarization state and reflect light rays in a second polarization state, and the second transmissive-reflective film can transmit the second light ray and the third light ray and reflect the first light ray; A first polarization conversion mechanism, which is arranged on the same side of the first transmissive-reflective component as the first light source and is inclined relative to the first transmissive-reflective component. The first polarization conversion mechanism can convert the second polarization state light rays from the first transmissive-reflective component into first polarization state light rays and reflect them back to the first transmissive-reflective component; A second polarization conversion mechanism, which is arranged between the second light source and the second transmissive-reflective component. The second polarization conversion mechanism can convert the second polarization state light rays from the second transmissive-reflective component into first polarization state light rays and reflect them back to the second transmissive-reflective component; and, A third polarization conversion mechanism, which is arranged between the third light source and the second transmissive-reflective component. The third polarization conversion mechanism can convert the second polarization state light rays from the second transmissive-reflective component into first polarization state light rays and reflect them back to the second transmissive-reflective component.

2. The light source module according to claim 1, wherein, The first light source and the second light source are located on two opposite sides of the first transmissive-reflective component and the second transmissive-reflective component. In the direction from the first light source to the second light source, the first light source, the first transmissive-reflective component, the second transmissive-reflective component and the second light source are arranged in sequence; or, The first light source and the third light source are located on two opposite sides of the first transmissive-reflective component and the second transmissive-reflective component. In the direction from the first light source to the third light source, the first light source, the first transmissive-reflective component, the second transmissive-reflective component and the third light source are arranged in sequence.

3. The light source module according to claim 1, wherein The second light source and the first polarization conversion mechanism are located on two opposite sides of the first transmissive-reflective component and the second transmissive-reflective component; or, The third light source and the second polarization conversion mechanism are located on two opposite sides of the first transmissive-reflective component and the second transmissive-reflective component.

4. The light source module according to claim 1, wherein, The first transmissive-reflective component and the second transmissive-reflective component are perpendicular to each other. The first transmissive-reflective component forms a 45° angle with the main light ray emission direction of the first light source, and the second transmissive-reflective component forms a 45° angle with the main light ray emission directions of both the second light source and the third light source; and / or, The main light ray emission directions of the second light source and the third light source are perpendicular to each other. The main light ray emission direction of the first light source is parallel to the main light ray emission direction of one of the second light source and the third light source and perpendicular to the main light ray emission direction of the other.

5. The light source module according to claim 1, wherein The light source module includes a first prism, a second prism, and a third prism, all of which are right-angled prisms. Two right-angled faces of the third prism are respectively opposite to the inclined faces of the first prism and the second prism. One of the first polarization element and the first dichroic film is disposed on the inclined face of the first prism, and the other is disposed on the right-angled face of the third prism. One of the second polarization element and the second dichroic film is disposed on the inclined face of the second prism, and the other is disposed on the right-angled face of the third prism.

6. The light source module according to claim 1, wherein The light source module includes two light-transmitting flat plates. The first polarization element and the first dichroic film are respectively disposed on two opposite sides of one of the light-transmitting flat plates, and the second polarization element and the second dichroic film are respectively disposed on two opposite sides of the other light-transmitting flat plate.

7. The light source module according to claim 1, wherein The first polarization element is disposed on a side of the first dichroic film facing the first light source, and the second polarization element is disposed on a side of the second dichroic film facing the second light source and the third light source.

8. The light source module according to claim 1, wherein The first polarization conversion mechanism includes a first quarter-wave plate and a first reflection element disposed on a side of the first quarter-wave plate facing away from the first dichroic component.

9. The light source module according to claim 1, wherein The second polarization conversion mechanism includes a second quarter-wave plate and a first dichroic element disposed between the second quarter-wave plate and the second light source. The first dichroic element can transmit the second light beam and reflect the third light beam; and / or, The third polarization conversion mechanism includes a third quarter-wave plate and a second dichroic element disposed between the third quarter-wave plate and the third light source. The second dichroic element can transmit the third light beam and reflect the second light source.

10. The light source module according to claim 1, characterized in that, The first light beam is red light, the second light beam is green light, and the third light beam is blue light; and / or, The polarization planes of the first polarized light beam and the second polarized light beam are perpendicular to each other.

11. The light source module according to claim 1, wherein, The light source module includes a first color filter film and a second color filter film. The first color filter film is disposed on an outgoing light side of the first dichroic component, and the second color filter film is disposed on an outgoing light side of the second dichroic component. The first color filter film is used to reduce the intensity of the light beam with the highest intensity among the first light beam, the second light beam, and the third light beam emitted from the first dichroic component, and the second color filter film is used to reduce the intensity of the light beam with the highest intensity among the first light beam, the second light beam, and the third light beam emitted from the second dichroic component.

12. A light-emitting device, characterized in that, It includes a carrier and a plurality of light source modules as described in any one of claims 1-11. The plurality of light source modules are arranged in an array on the carrier.

13. The light-emitting device according to claim 12, characterized in that, In the array formed by the plurality of light source modules, any one of the first dichroic components is adjacent to the first dichroic components and the second dichroic components of other light source modules in a first direction and a second direction respectively, or any one of the first dichroic components is adjacent to the second dichroic components of other light source modules in both the first direction and the second direction. The first direction and the second direction are perpendicular to each other.

14. A lighting system, characterized in that, Comprising a modulation imaging module and a light source module as described in any one of claims 1-11, the modulation imaging module includes a beam splitting element and a reflective modulator. The beam splitting element is disposed on the light-emitting side of the light source module. The beam splitting element is configured to conduct the light emitted by the light source module to the reflective modulator, and is also configured to receive and emit the light modulated by the reflective modulator.

15. The lighting system according to claim 14, wherein, The polarization planes of the first polarization state light and the second polarization state light are perpendicular to each other. The first polarization state light is either P light or S light. The light source module can rotate 90° relative to the beam splitting element around the light-emitting direction of the light source module, so that the first polarization state light can be switched between P light and S light.

16. A display device, characterized in that, Comprising an imaging lens group and an illumination system as described in claim 14 or 15, the imaging lens group is disposed on the light-emitting side of the beam splitting element and is configured to shape and emit the light emitted by the beam splitting element.

17. The display device according to claim 16, wherein The beam splitting surface of the beam splitting element can reflect the first polarization state light and transmit the second polarization state light. The display device further includes a polarization conversion component. The polarization conversion component can convert the second polarization state light from the beam splitting surface into the first polarization state light and reflect it back to the beam splitting surface. The polarization conversion component is disposed on the side of the beam splitting element facing away from the reflective modulator. The imaging lens group is disposed on the side of the beam splitting element facing away from the light source module. One side of the beam splitting surface is inclined relative to the light source module and the reflective modulator, and the other side is inclined relative to the polarization conversion component and the imaging lens group.

18. The display device according to claim 16, wherein The illumination system further includes a half-wave plate disposed between the beam splitting element and the light source module. The half-wave plate is configured to convert the first polarization state light emitted by the light source module into the second polarization state light. The beam splitting surface of the beam splitting element can reflect the second polarization state light and transmit the first polarization state light. The display device further includes a polarization conversion component. The polarization conversion component can convert the first polarization state light from the beam splitting surface into the second polarization state light and reflect it back to the beam splitting surface. The polarization conversion component is disposed on the side of the beam splitting element facing away from the light source module. One side of the beam splitting surface is inclined relative to the light source module and the reflective modulator, and the other side is inclined relative to the polarization conversion component and the imaging lens group.

Images