Light combining device, light combining assembly, lighting module and optical equipment

Abstract

The utility model discloses a light combination device, a light combination assembly, an illumination module and optical equipment. The light combination device comprises a transparent substrate and a film layer, the film layer is plated on the first surface of the transparent substrate; the film layer comprises a polarization beam splitting film and an antireflection film; wherein the polarizing beam-splitting film and the antireflection film are plated on the first surface in a parallel and seamless manner and completely cover the first surface, and energy loss caused by spectrum overlapping or opening can be reduced through the design, so that the energy utilization rate of a light source is improved; and the purposes of improving the lighting effect and the output luminous flux of the whole machine are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and specifically to a light combining device, a light combining assembly, a lighting module and an optical equipment. Background Art

[0002] In the field of projection technology, the current dominant projection solutions on the market include pure laser, pure LED and hybrid light source solutions. The pure laser solution means that all lighting sources are laser, while the pure LED solution relies entirely on LED as the lighting source. In addition, the hybrid light solution combines the two light sources of laser and LED to achieve a better projection effect by integrating the advantages of both.

[0003] Regardless of which solution is adopted, the lighting system usually includes at least three light sources of different colors. After these light sources of different colors emit light, they need to be converged through a specific light combination technology, and then illuminated to the spatial light modulation device, which modulates the light and projects it through the projection lens to form a projection image.

[0004] Existing light combining technologies can be mainly divided into two categories: wavelength light combining and position light combining. Wavelength light combining relies on the difference between the wavelengths of different light sources, and combines the light through optical devices such as dichroic mirrors or bandpass filters. Position light combining, on the other hand, utilizes the difference in the spatial position of different light sources, such as using a reflector with a central hole, so that the light from one light source directly passes through the central hole, while the light from another light source is reflected from other areas of the reflector, thereby combining the light.

[0005] However, both of these light-combining technologies have significant efficiency issues. For positional light combining, due to the presence of the center hole, the light that should have been used for projection is completely lost at the center hole, resulting in reduced light energy utilization. As for wavelength light combining, especially when it comes to wide-spectrum light sources or light sources with similar colors, due to their extremely high spectral overlap, the light energy of the spectrally overlapping part often cannot be effectively utilized during the light combining process, further reducing the light combining efficiency. These problems limit the further improvement of the brightness and color performance of projection equipment, and also affect the user experience and market competitiveness of the equipment.

[0006] The content of this background technology description is only for facilitating understanding of the relevant technology in this field and is not regarded as an admission of the prior art. Summary of the invention

[0007] The embodiments of the present application intend to provide a light combining device, a light combining assembly, a lighting module and an optical device, which can combine light by using the light combining device; it can reduce energy loss caused by spectral overlap or opening, thereby improving the energy utilization rate of the light source, and further achieving the purpose of improving the overall light efficiency and output luminous flux. The light combining device is introduced below in conjunction with a specific embodiment.

[0008] In a first aspect, an embodiment of the present application provides a light-combining device, comprising: a transparent substrate and a film layer; the film layer is coated on a first surface of the transparent substrate; the film layer comprises: a polarization splitting film and an anti-reflection film; wherein the polarization splitting film and the anti-reflection film are coated on the first surface in a parallel and seamless manner and completely cover the first surface.

[0009] Optionally, the transparent substrate is a flat substrate or a prism substrate.

[0010] Optionally, the areas of the polarization splitting film and the anti-reflection film are set according to the areas of light spots incident on the polarization splitting film and the anti-reflection film.

[0011] In an embodiment of the present application, in a second aspect, an embodiment of the present application provides a light combining component, which includes: an inversion unit and a light combining device described in any embodiment of the first aspect above; the inversion unit is arranged on the outgoing light path of the incident light entering from the polarization splitting film area on the first surface; the inversion unit is a reflective liquid crystal device, and the reflective liquid crystal device includes a liquid crystal layer and a reflective layer; or, the inversion unit includes a 1 / 4 wave plate and a reflector, the 1 / 4 wave plate is arranged between the light combining device and the reflector, the 1 / 4 wave plate and the reflector are bonded or fixed together, or the 1 / 4 wave plate and the reflector are independent of each other.

[0012] Optionally, the light combining assembly includes an inversion unit, and the inversion unit is arranged on the light path of the transmitted light or the reflected light of the incident light entering from the polarization splitting film area on the first surface.

[0013] Optionally, the light combining component includes a first inversion unit and a second inversion unit; the first inversion unit is arranged on the transmitted light path of the incident light entering from the polarization splitting film area on the first surface; the second inversion unit is arranged on the reflected light path of the incident light entering from the polarization splitting film on the first surface.

[0014] In the third aspect of the embodiment of the present application, the embodiment of the present application provides a lighting module, the lighting module comprising: a first light source assembly, a second light source assembly and a light combining assembly as described in any embodiment of the second aspect; the first light source assembly and the second light source assembly are both located on the light incident surface side of the beam splitter film,

[0015] The outgoing light of the first light source assembly enters the light combining assembly from the anti-reflection film area on the first surface, and the outgoing light of the second light source assembly enters the light combining assembly from the polarization beam splitting film area on the first surface;

[0016] The first light source assembly and the second light source group include light sources of at least one color, and the light sources are laser light sources or LED light sources.

[0017] Optionally, the first light source assembly and the second light source group include the same light source type or different light source types; the light source type is an integrated light source or a discrete light source.

[0018] Optionally, the first light source assembly and the second light source group include at least one broad-spectrum light source, or the first light source assembly and the second light source assembly include at least one light source with the same or similar color.

[0019] In an embodiment of the present application, in a fourth aspect, an embodiment of the present application provides an optical device, which includes: a light modulation module, an imaging module, and the lighting module described in any embodiment of the third aspect above; the illumination light emitted by the lighting module is modulated by the light modulation module, and then amplified by the imaging module and projected out to form a projection picture.

[0020] Other optional features and technical effects of the embodiments of the present application are partially described below, and partially can be understood by reading this document. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. The elements shown are not limited by the proportions shown in the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements, wherein:

[0022] Figure 1 A schematic diagram of the structure of a light combining device that can implement the embodiment of the present application is shown;

[0023] Figure 2 A schematic diagram of a membrane structure that can implement an embodiment of the present application is shown;

[0024] Figure 3 Another schematic diagram of the structure of a light combining device that can implement the embodiment of the present application is shown;

[0025] Figure 4 A schematic diagram of the structure of another light combining device that can implement the embodiment of the present application is shown;

[0026] Figure 5 A schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown;

[0027] Figure 6 Another schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown;

[0028] Figure 7 A schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown;

[0029] Figure 8 Another schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown;

[0030] Fig. 9 A schematic diagram of the structure of an optical device that can implement an embodiment of the present application is shown.

[0031] The markings in the figure are as follows: 10-light combining device; 20-first light source assembly; 30-second light source assembly; 101-transparent substrate; 102-film layer; 1021-polarization splitter film; 1022-anti-reflection film; 50-light combining assembly; 501-inversion unit; 601-first inversion unit; 602-second inversion unit; 902-light modulation module; 903-imaging module. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with specific implementation methods and drawings. Here, the illustrative implementation methods and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

[0033] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0034] In the embodiments of the present application, light combining by light combining device can reduce energy loss caused by spectral overlap or opening, thereby improving the energy utilization of the light source, and further achieving the purpose of improving the overall light efficiency and output luminous flux. The light combining component is introduced below in conjunction with specific embodiments.

[0035] Figure 1 A schematic diagram of the structure of a light combining device that can implement the embodiment of the present application is shown. Figure 1 The light combining device 10 shown includes: a lens substrate 101 and a film layer 102. The film layer 102 is plated on a first surface of the transparent substrate 101.

[0036] The following is a detailed description of the film layer 102, see Figure 2 , Figure 2 FIG. 1 shows a schematic diagram of a membrane structure that can be used to implement the embodiment of the present application. Figure 2 As shown, the film layer 102 includes a polarization splitting film 1021 and an anti-reflection film 1022. Figure 1 As shown, the polarization splitting film 1021 and the anti-reflection film 1022 are coated on the first surface of the bright substrate in a parallel manner and completely cover the first surface. There is no gap between the polarization splitting film 1021 and the anti-reflection film 1022, and the polarization splitting film 1021 and the anti-reflection film 1022 respectively cover a portion of the first surface.

[0037] It should be noted that in the embodiment of the present application, the areas of the polarization splitting film 1021 and the anti-reflection film 1022 can be set differently according to the size of the light spot area incident thereon, that is, the areas of the polarization splitting film 1021 and the anti-reflection film 1022 can be equal or unequal.

[0038] The polarization splitting film is used to transmit P polarized light and reflect S polarized light, or transmit S polarized light and reflect P polarized light.

[0039] The material of the transparent substrate 101 can be a light-transmitting solid material such as glass, rubber, plastic or ceramic. The material of the transparent substrate 101 is not specifically limited in the embodiment of the present application.

[0040] Figure 2 In the illustrated embodiment, the transparent substrate 101 is a flat substrate, and the first surface is the upper surface of the transparent flat substrate; in other embodiments, the transparent substrate may also be a prism substrate, such as an isosceles right-angle prism. Figure 3 and Figure 4 . Figure 3 A schematic diagram of the structure of another light combining device that can implement the embodiment of the present application is shown. Figure 4 A schematic diagram of the structure of another light combining device that can implement the embodiment of the present application is shown. Figure 3 The embodiment shown includes a prism, Figure 4 The embodiment shown includes two prisms, Figure 3 and Figure 4 In the illustrated embodiment, the first surface is the inclined surface of a prism. Figure 2-Figure 4 In the illustrated embodiment, the transparent flat substrate and other surfaces of the prisms may also be coated with an anti-reflection film to improve the overall light effect.

[0041] The light combining device provided in the embodiment of the present application is coated on the first surface of the bright substrate in a parallel manner by a polarization splitting film and an anti-reflection film, and combines light by combining polarization light combining with position light combining. No holes are required, and there is no problem of spectral overlap, thereby avoiding energy loss due to spectral overlap or holes, thereby improving the energy utilization rate of the light source, and further achieving the purpose of improving the luminous efficiency and output luminous flux of the whole machine.

[0042] The following is a detailed introduction to the light combining components.

[0043] The above-mentioned light combining device is used to make the light incident from the area (M2) on the first surface where the anti-reflection film is set to be directly emitted along the first direction (x-axis direction) after being transmitted by the light combining device, and make the light incident from the area (M1) on the first surface where the polarization splitting film is set to be first polarized and reflected by the inversion unit, and then emitted from the first direction, thereby realizing light combining.

[0044] Optionally, the inversion unit includes a quarter wave plate and a reflector, the quarter wave plate is disposed between the optical combiner and the reflector, and the quarter wave plate can be attached to or fixed to the reflector, or can be independent of the reflector. Since the light passes through the quarter wave plate twice, it is equivalent to passing through a half wave plate, so the polarization state changes.

[0045] In some other embodiments, the inversion unit is a reflective liquid crystal device. The reflective liquid crystal device includes a liquid crystal layer and a reflective layer, and can achieve the same function as the combination of a quarter wave plate and a reflector without additional optical elements. Thereby achieving the effect of changing the polarization state of light and reflecting light. Optionally, the reflective liquid crystal device is a liquid crystal on silicon (LCOS) chip. Since the LCOS chip itself includes a liquid crystal box and a reflective layer, its function is the same as that of the combination of a quarter wave plate and a reflector, and can also achieve the effect of changing the polarization state of light and reflecting light.

[0046] Figure 5 A schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown. Figure 5 The light combining assembly 50 shown includes: the light combining device 10 described in the above embodiment and an inversion unit 501. Figure 5In the illustrated embodiment, the inversion unit 501 is arranged on the transmission light path of the incident light entering from the polarization splitting film area on the first surface, that is, the inversion unit is arranged opposite to the second light source assembly, the emitted light of the second light source assembly is P polarized light, and the emitted light of the first light source assembly can be natural light or polarized light. The emitted light of the first light source is directly emitted along the first direction (x-axis direction) through M2, and the emitted light of the second light source assembly reaches the inversion unit after being transmitted through M1. The inversion unit converts the P polarized light incident thereon into S polarized light, and returns the S polarized light to M1 along the original path. M1 reflects the S polarized light, and the reflected S polarized light is also emitted along the first direction, so as to achieve the purpose of combining light with the emitted light of the first light source assembly.

[0047] Optionally, the inversion unit is arranged on the reflected light path of the incident light entering from the polarization splitting film area on the first surface, that is, when the inversion unit is arranged on one side of the first light source assembly, the output light of the second light source assembly is S polarized light, and the inversion unit converts the S polarized light incident thereon into P polarized light, and returns the converted P polarized light to M1 along the original path, and M1 transmits the returned P polarized light to achieve the purpose of combining light with the output light of the first light source assembly.

[0048] The setting position of the inversion unit is related to the polarization state of the light emitted by the second light source assembly and the splitting performance of the polarization splitting film. The above-mentioned light combining principle is illustrated by taking the polarization splitting film transmitting P polarized light and reflecting S polarized light as an example. It can be understood that when the polarization splitting film is set to transmit S polarized light and reflect P polarized light, the position of the inversion unit can be set according to the polarization state of the light emitted by the second light source assembly. The light combining principle is similar to that of the above-mentioned embodiment and will not be repeated here.

[0049] Figure 6 Another schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown. Figure 6 The light combining assembly 50 shown includes: the light combining device 10 described in the above embodiment, a first reversing unit 601 and a second reversing unit 602. The first reversing unit 601 is arranged on the transmission light path of the incident light entering from the polarization splitting film area on the first surface, and the second reversing unit is arranged on the reflection light path of the incident light entering from the polarization splitting film on the first surface.

[0050] like Figure 6As shown, the first reversing unit 601 is arranged opposite to the second light source assembly and the light combining device is located between the first reversing unit 601 and the second light source assembly; the second reversing unit 602 and the first light source assembly are located on the same side of the light combining device, and the second reversing unit 602 can be arranged in parallel or staggered in the first light source assembly. The emitted light of the second light source assembly is natural light, and the emitted light of the first light source assembly can be natural light or polarized light. The outgoing light of the first light source is directly emitted along the first direction through M2, and the outgoing light of the second light source assembly is divided into P polarized light and S polarized light after passing through M1, wherein the P polarized light reaches the first inversion unit 601 after being transmitted by M1, and the S polarized light is reflected by M1 and reaches the second inversion unit 602, the first inversion unit converts the P polarized light incident thereon into S polarized light, and returns the S polarized light to M1 along the original path, and M1 reflects the S polarized light and emits it along the first direction, the second inversion unit converts the S polarized light incident thereon into P polarized light, and returns the P polarized light to M1 along the original path, and M1 transmits the P polarized light and also emits it along the first direction, thereby realizing the light combination of the outgoing light of the first light source assembly and the outgoing light of the second light source assembly.

[0051] It should be noted that, in the above embodiment, M1 is a polarization splitting film, and M2 is an anti-reflection film.

[0052] The embodiment of the present application also discloses a lighting module, which includes a first light source assembly, a second light source assembly and a light combining assembly as described in any of the above embodiments. The first light source assembly and the second light source assembly are both located on the light incident side of the film layer. The outgoing light of the first light source assembly is incident along a first direction (x-axis direction) from an area (M2) on the first surface where an anti-reflection film is arranged, and the outgoing light of the second light source assembly is incident along a second direction (y-axis direction) from an area (M1) on the first surface where a polarization splitting film is arranged. The first direction is perpendicular to the second direction. The first light source assembly and the second light source assembly include light sources of at least one color. The light source colors in the embodiments of the present application are colors perceived by the human eye, such as red, green, blue, yellow, cyan, purple, etc.

[0053] Specifically, depending on the type of light source assembly, the light source assembly may also include other optical components such as lenses and light homogenizers. The light source type here mainly refers to the light-emitting principle and packaging method of the light source. For example, according to the light-emitting principle, it can be divided into laser light sources and LED light sources; according to the packaging method, it can be divided into integrated light sources and discrete light sources.

[0054] It should be noted that the same light source assembly may include light sources of the same type or different light sources, and different light source assemblies may include light sources of the same type or different light sources.

[0055] Preferably, the first light source assembly and the second light source assembly each include a light source of at least one color. For example, if the first light source assembly includes a light source of one color, the light source colors included in the second light source assembly may be one, two, or three, etc. When the first light source assembly includes light sources of two colors, the light source colors included in the second light source assembly may also be one, two, or three, etc. The embodiment of the present application does not specifically limit the number of light source colors included in the light source assembly.

[0056] Preferably, the first light source assembly and the second light source assembly include at least one wide spectrum light source or a light source of the same color (same color light source). When two same color light sources with different wavelengths are included, the two same color light sources with different wavelengths are respectively located in the first light source assembly and the second light source assembly. For example, if a 613nm red light source is located in the first light source assembly, a 630nm red light source is located in the second light source assembly. It is generally believed that LED light sources are wide spectrum light sources, especially LED light sources in the yellow to green wavelength band.

[0057] Preferably, the first light source assembly is an LED light source assembly, which includes an LED light source of at least one color, and the second light source assembly is a laser light source assembly, which includes a laser light source of at least one color.

[0058] The following is a detailed description of the light source components in the lighting module. Figure 7 and Figure 8 . Figure 7 A schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown.

[0059] Figure 7 The lighting module shown includes: a light combining assembly 50, a first light source assembly 20 and a second light source assembly 30. The light combining assembly 10 is the same as the above embodiment and will not be described in detail here. Figure 7 As shown, the first light source assembly 20 is an LED light source assembly, and the second light source assembly 30 is a laser light source assembly. Figure 7 As shown, the first light source assembly 20 includes a red LED light source (R-LED), a green LED light source (G-LED) and a blue LED light source (B-LED). The red, green and blue light emitted by the first light source is emitted from the M2 region and directly emitted along the first direction; the second light source assembly is a laser light source assembly, and the second light source assembly includes a red laser light source (R-LD), a green laser light source (G-LD) and a blue laser light source (B-LD). Figure 7 In the embodiment shown, the three-color laser light source is an integrated light source. The red, green and blue lasers emitted by the second light source assembly are incident from the M1 region, and after polarization conversion and reflection by the inversion unit, they return to the M1 region again, and after being reflected again by the M1 region, they are emitted in the first direction, completing the light combination with the light emitted by the first light source.

[0060] It should be noted that in Figure 7 In the illustrated embodiment, the inversion unit includes a quarter wave plate and a reflector. The quarter wave plate is disposed between the optical combiner and the reflector, and the quarter wave plate can be bonded or fixed to the reflector, or can be independent of the reflector. Due to the presence of the reflector, light passes through the quarter wave plate twice when passing through the inversion unit, which is equivalent to passing through a half wave plate, thereby achieving polarization state conversion.

[0061] Figure 8 A schematic diagram of the structure of another lighting module that can implement the embodiment of the present application is shown. Figure 8 The lighting module shown includes: a light combining assembly 50, a first light source assembly 20 and a second light source assembly 30. The light combining assembly 10 is the same as the above embodiment and will not be described in detail here.

[0062] like Figure 8 As shown, the first light source assembly 20 is an LED light source assembly, and the first light source assembly 20 includes a green LED light source (G-LED). The green light emitted by the first light source is emitted from the M2 region and directly emitted along the first direction. The second light source assembly 30 includes three laser light sources: a red laser light source (R-LD), a green laser light source (G-LD), and a blue laser light source (B-LD). Figure 8 In the embodiment shown, the three-color laser light source is a discrete light source. The red, green and blue lasers emitted by the second light source assembly are incident from the M1 region, and after polarization conversion and reflection by the inversion unit, they return to the M1 region again, and after being reflected again by the M1 region, they are emitted in the first direction, completing the light combination with the light emitted by the first light source.

[0063] It should be noted that in Figure 8 In the embodiment shown, the inversion unit is a reflective liquid crystal device. The reflective liquid crystal device includes a liquid crystal box and a reflective layer, and can achieve the same function as the combination of a quarter wave plate and a reflector without additional optical elements. Thereby changing the polarization state of light and reflecting light is achieved. Optionally, the reflective liquid crystal device is a liquid crystal on silicon (LCOS) chip.

[0064] By setting the first light source component to be an LED light source component and the second light source component to be a laser light source component, since the light emitted by the LED light source is natural light and the laser itself is polarized light, the light emitted by the laser light source is incident from the M1 area and the light emitted by the LED light source is incident from the M2 area, thereby reducing the loss of light source energy and improving the output efficiency of the whole machine.

[0065] Figure 7In the embodiment shown, the three-color laser light source is an integrated light source. Since the divergence angle of the LED light source is large, in order to improve the energy utilization of the LED light source, a lens group can also be provided in the first light source assembly 20 to collimate and reduce the light emitted by the LED light source. Figure 8 In the embodiment shown, the three-color laser light sources are discrete light sources, and the second light source assembly may also include a dichroic mirror to combine the light emitted by different discrete light sources. Figure 8 As shown, the second light source assembly also includes a diffuser for de-Gaussianizing the laser.

[0066] To sum up, through the light combining method provided by the above embodiments, the wide-spectrum light source or the same-color light source in the light combining light source can be set in different light source components, and the light can be combined through the light combining components to avoid reducing the energy loss caused by spectral overlap or opening, thereby improving the energy utilization of the light source, and further achieving the purpose of improving the luminous efficiency and output luminous flux of the whole machine.

[0067] It should be noted that, as required, a collimating component, a light homogenizing component or a relay component may be further provided on the light emitting side of the combined light beam in the lighting module to further process the combined light beam.

[0068] The present application also provides an optical device, see Fig. 9 . Fig. 9 A schematic diagram of the structure of an optical device that can implement an embodiment of the present application is shown. Fig. 9 The optical device shown is a projection device, and the optical device includes: the illumination module 901, the light modulation module 902 and the imaging module 903 described in any of the above embodiments. The illumination light emitted by the illumination module 901 is modulated by the light modulation module 902 (digital micromirror element or silicon-based liquid crystal or liquid crystal display), and then amplified by the imaging module 903 and projected to form a projection picture.

[0069] The projection device in the embodiment of the present application may be a projector or a laser TV, or may be a PGU (Picture Generation Unit) in a HUD (Heads Up Display), etc. The embodiment of the present application is not specifically limited.

[0070] In this article, multiple embodiments of the present application are described, but for the sake of simplicity, the description of each embodiment is not exhaustive, and the same or similar features or parts between the various embodiments may be omitted. In this article, "one embodiment", "some embodiments", "example", "specific example", or "some examples" are intended to be applicable to at least one embodiment or example according to the present application, rather than all embodiments. The above terms do not necessarily mean to refer to the same embodiment or example. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0071] The exemplary systems and methods of the present application have been specifically shown and described with reference to the above embodiments, which are merely examples of the best modes for implementing the present systems and methods. It will be appreciated by those skilled in the art that various changes may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or methods without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A light combining device, characterized in that: include: Transparent substrate and film layer; The film layer is plated on the first surface of the transparent substrate; The film layer includes: a polarization splitting film and an anti-reflection film; The polarization splitting film and the anti-reflection film are plated on the first surface in a parallel and seamless manner and completely cover the first surface.

2. The light combining device according to claim 1, characterized in that: The transparent substrate is a flat substrate or a prism substrate.

3. The light combining device according to claim 1, characterized in that: The areas of the polarization splitting film and the anti-reflection film are set according to the areas of the light spots incident on the polarization splitting film and the anti-reflection film.

4. A light combining component, characterized in that: include: An inversion unit and a light combining device as claimed in any one of claims 1 to 3; The inversion unit is arranged on the outgoing light path of the incident light entering from the polarization splitting film area on the first surface; The inversion unit is a reflective liquid crystal device, which includes a liquid crystal layer and a reflective layer; or, the inversion unit includes a 1 / 4 wave plate and a reflector, the 1 / 4 wave plate is arranged between the light combining device and the reflector, the 1 / 4 wave plate and the reflector are bonded or fixed together or the 1 / 4 wave plate and the reflector are independent of each other.

5. The light combining assembly according to claim 4, characterized in that: The light combining assembly includes an inversion unit, which is arranged on the light path of the transmitted light or the reflected light of the incident light entering from the polarized beam splitting film area on the first surface.

6. The light combining assembly according to claim 4, characterized in that: The light combining component includes a first inversion unit and a second inversion unit; the first inversion unit is arranged on the transmitted light path of the incident light entering from the polarization splitting film area on the first surface; the second inversion unit is arranged on the reflected light path of the incident light entering from the polarization splitting film on the first surface.

7. A lighting module, characterized in that: The lighting module comprises: a first light source assembly, a second light source assembly and a light combining assembly as claimed in any one of claims 4 to 6; The first light source assembly and the second light source assembly are both located on the light incident side of the beam splitter film; The outgoing light of the first light source assembly enters the light combining assembly from the anti-reflection film area on the first surface, and the outgoing light of the second light source assembly enters the light combining assembly from the polarization beam splitting film area on the first surface; The first light source assembly and the second light source group include light sources of at least one color, and the light sources are laser light sources or LED light sources.

8. The lighting module according to claim 7, characterized in that: The first light source assembly and the second light source group include the same light source type or different light source types; The light source type is an integrated light source or a discrete light source.

9. The lighting module according to claim 8, characterized in that: The first light source assembly and the second light source group include at least one broad-spectrum light source, or the first light source assembly and the second light source assembly include at least one light source with the same or similar color.

10. An optical device, characterized in that: The optical device comprises: a light modulation module, an imaging module and an illumination module as claimed in any one of claims 7 to 9; The illumination light emitted by the illumination module is modulated by the light modulation module, amplified by the imaging module and then projected to form a projection picture.

Images