Light combination assembly, illumination module and optical equipment

Abstract

The utility model discloses a light combination assembly, a lighting module and optical equipment. The light combination assembly comprises a polarization splitting prism, a first plane mirror, a second plane mirror, a third plane mirror and a right-angle mirror. Wherein the polarization splitting prism comprises a polarization splitting surface; the polarization splitting prism, the first plane mirror, the second plane mirror and the third plane mirror are respectively arranged at four vertex positions of a virtual space quadrangle; the right-angle reflecting mirror is arranged on any side of the virtual space quadrangle, and two reflecting surfaces of the right-angle reflecting mirror are respectively parallel to the polarization splitting surfaces of the polarization splitting prisms or the plane reflecting mirrors on the two vertexes of the side where the right-angle reflecting mirror is located. Therefore, energy loss caused by spectrum overlapping or trepanning is reduced, the energy utilization rate of the light source is improved, and the purposes of improving the overall lighting effect and the output luminous flux are achieved.

Description

Technical Field

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

[0002] At present, the light source in the projection scheme of the prior art can be a pure laser light source, a pure LED light source, and a mixed light source, wherein a pure laser light source means that all lighting light sources are laser light sources, a pure LED light source means that all lighting light sources are LED light sources, and a mixed light source means that the lighting light source includes both a laser light source and an LED light source. Regardless of which light source is used, the lighting light source includes at least three different color light sources, and the light emitted by these different color light sources needs to be combined and irradiated onto a spatial light modulator, and then modulated by the spatial light modulator and projected out through a projection lens to form a projection image.

[0003] The commonly used light combining methods in related technologies are mainly wavelength light combining and position light combining. Among them, wavelength light combining is to combine light by using the difference in wavelength, and the main components used are dichroic mirrors or bandpass filters. Position light combining is to combine light by using the difference in the positions of different light sources, such as using a reflector with an opening to make the light of one light source pass through the center hole, and the light of another light source is reflected from the area outside the opening.

[0004] Among them, position light combination, due to the existence of the center hole, will cause all the reflected light incident on the center hole to be lost; and wavelength light combination, especially the light combination between wide-spectrum light sources or light sources with the same or similar colors, due to the high degree of spectral overlap between the two, the light energy of the spectral overlap part is often unable to be used during light combination, resulting in low light combination efficiency.

[0005] 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

[0006] The embodiments of the present application intend to provide a light-combining component, a lighting module and an optical device, which use a polarization beam splitter prism and a plane reflector to form a light-combining component; it can reduce energy loss caused by spectral overlap or opening, improve the energy utilization rate of the light source, and thus achieve the purpose of improving the lighting efficiency and output luminous flux of the whole machine.

[0007] In a first aspect, an embodiment of the present application provides a light combining component, comprising: a polarization beam splitter prism, a first plane reflector, a second plane reflector, a third plane reflector and a right-angle reflector; wherein the polarization beam splitter prism comprises a polarization beam splitting surface; the polarization beam splitter prism and the first plane reflector, the second plane reflector and the third plane reflector are respectively arranged at the four vertex positions of a virtual space quadrilateral; the right-angle reflector is arranged on any side of the virtual space quadrilateral, and the two reflection surfaces of the right-angle reflector are respectively parallel to the polarization beam splitting surfaces of the polarization beam splitter prism or the plane reflector at the two vertices of the side where the right-angle reflector is located.

[0008] Optionally, the polarization beam splitter prism and the third plane reflector are located on a diagonal line of the virtual space quadrilateral, and the first plane reflector and the second plane reflector are located on another diagonal line of the virtual space quadrilateral.

[0009] Optionally, the polarization beam splitter prism includes at least one light incident surface and two light emitting surfaces; the first plane reflector and the second plane reflector are respectively located on both sides of the two light emitting surfaces;

[0010] The polarization beam splitter prism splits the incident light into two mutually perpendicular directions; the first plane reflector, the second plane reflector and the third plane reflector respectively reflect the outgoing light in the two mutually perpendicular directions onto the two surfaces of the right-angle reflector, and the two surfaces of the right-angle reflector respectively reflect the two beams of light out in the same direction.

[0011] Optionally, the polarization splitter prism includes two right-angle prisms, and the oblique surfaces of the two right-angle prisms are bonded to each other; a polarization splitter medium film is arranged on the oblique side of the right-angle prism to form the polarization splitter surface, and the polarization splitter medium film transmits the first polarized light and reflects the second polarized light or transmits the second polarized light and reflects the first polarized light; after the incident light is incident on the polarization splitter prism, it is polarized by the polarization splitter prism, and the polarized incident light is emitted from the corresponding light output surface according to its polarization state.

[0012] Optionally, the first plane reflector and the second plane reflector are respectively arranged parallel to the polarization splitting plane.

[0013] Optionally, the right-angle reflector includes a fourth plane reflector and a fifth plane reflector;

[0014] One end of the fourth plane reflecting mirror and one end of the fifth plane reflecting mirror are glued together.

[0015] In an embodiment of the present application, in the second aspect, an embodiment of the present application provides a lighting module, which includes: a light source assembly and a light combining assembly described in any embodiment of the first aspect above; the light source assembly is located on the light incident surface side of the polarization beam splitter prism, and the light source assembly includes a light source of at least one color, and the light source is a laser light source or an LED light source.

[0016] Optionally, there are one or two light source components; if there is one light source component, the light source component includes the same light source type or different light source types; if there are two light source components, each light source component includes the same light source type or different light source types; wherein the light source types include integrated light sources and discrete light sources.

[0017] Optionally, the light source assembly includes a broad-spectrum light source, or the light source assembly includes at least one light source with the same or similar color.

[0018] In an embodiment of the present application, in a third 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 second 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.

[0019] 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

[0020] 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:

[0021] Figure 1 A schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown;

[0022] Figure 2 A schematic diagram of the structure of a polarization beam splitter prism that can implement the embodiment of the present application is shown;

[0023] Figure 3 Another schematic diagram of the structure of a polarization beam splitter prism that can implement the embodiment of the present application is shown;

[0024] Figure 4 Another schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown;

[0025] Figure 5 A schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown;

[0026] Figure 6 Another schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown;

[0027] Figure 7 A schematic diagram of the structure of an optical device that can implement an embodiment of the present application is shown.

[0028] The markings in the figure are as follows: 10-light combining assembly; 20-first light source assembly; 30-second light source assembly; 101-polarization beam splitting prism; 102-first plane reflector; 103-second plane reflector; 104-third plane reflector; 105-fourth plane reflector; 106-fifth plane reflector; 107-right-angle reflector. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] In the embodiment of the present application, a light combining component is provided which is composed of a polarization beam splitter prism and a plane reflector; the energy loss caused by spectral overlap or opening can be reduced, 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 component is introduced below in conjunction with a specific embodiment.

[0032] Figure 1 A schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown. Figure 1The light combining assembly 10 shown includes: a polarization beam splitter prism 101, a first plane reflector 102, a second plane reflector 103, a third plane reflector 104, a fourth plane reflector 105 and a fifth plane reflector 106. Among them, one end of the fourth plane reflector 105 and one end of the fifth plane reflector 106 are glued together to form a right-angle reflector. The polarization beam splitter prism (polarization beam splitter, PBS) 101 and the first plane reflector 102, the second plane reflector 103 and the third plane reflector 104 are respectively arranged at the four vertices of the quadrilateral formed by the light combining assembly.

[0033] Optionally, the polarization beam splitter prism and the third plane reflector are located on one diagonal line of the quadrilateral, and the first plane reflector and the second plane reflector are located on another diagonal line of the quadrilateral.

[0034] The right-angle reflector can be arranged on any side of the quadrilateral, and the two reflective surfaces of the right-angle reflector are respectively parallel to the polarized light splitting facets of the polarized light splitting prism or the plane reflector at the two vertices corresponding to the side. For example, the right-angle reflector is arranged on the side of the quadrilateral formed by the first plane reflector 102 and the third plane reflector 104, then the two reflective surfaces of the right-angle reflector are respectively parallel to the first plane reflector 102 and the third plane reflector 104.

[0035] If the right-angle reflector is disposed on the edge of the quadrilateral formed by the second plane reflector 103 and the third plane reflector 104 , then the two reflecting surfaces of the right-angle reflector are parallel to the second plane reflector 103 and the third plane reflector 104 , respectively.

[0036] If the right-angle reflector is disposed on the edge of the quadrilateral formed by the PBS and the first plane reflector 102, then the two reflection surfaces of the right-angle reflector are parallel to the polarization planes of the first plane reflector 102 and the PBS, respectively.

[0037] Likewise, if the right-angle reflector is disposed on the edge of the quadrilateral formed by the PBS and the second plane reflector, the two reflecting surfaces of the right-angle reflector are parallel to the polarized light planes of the second plane reflector and the PBS, respectively.

[0038] It should be noted that the quadrilateral formed by the light combining components in the embodiment of the present application is a virtual space, not a real quadrilateral, and is only used to illustrate the spatial positions of the polarization splitter prism 101 and the first plane reflector 102, the second plane reflector 103 and the third plane reflector 104.

[0039] For example, in Figure 1In the illustrated embodiment, the right-angle reflector is located on the edge of a quadrilateral formed by the first plane reflector 102 and the third plane reflector 104, and of the two reflecting surfaces of the right-angle reflector (the fourth plane reflector 105 and the fifth plane reflector 106), the fourth plane reflector 105 is parallel to the first plane reflector 102, and the fifth plane reflector 106 is parallel to the third plane reflector 104.

[0040] Specifically, in Figure 1 In the illustrated embodiment, the outgoing light of the first light source assembly and the second light source assembly is incident on the PBS, and the PBS divides the incident light into two mutually perpendicular directions for outgoing light. The outgoing light passes through the first plane reflector 102, the second plane reflector 103, and the third plane reflector 104, respectively, and the outgoing light in the two mutually perpendicular directions is reflected onto the two surfaces of the right-angle reflector. Finally, the two surfaces of the right-angle reflector (the fourth plane reflector 105 and the fifth plane reflector 106) respectively reflect the two beams of light out in the horizontal plane direction to achieve light combination.

[0041] It should be noted that in Figure 1 In the illustrated embodiment, the two mutually perpendicular directions are the horizontal plane direction (first direction) and the direction perpendicular to the horizontal plane (second direction). The embodiment of the present application does not impose any specific limitation on the two mutually perpendicular directions.

[0042] The following is a detailed description of the polarization beam splitter prism in the light combining component. Figure 2 and Figure 3 . Figure 2 A schematic diagram of the structure of a polarization beam splitter prism that can implement the embodiment of the present application is shown; Figure 3 A schematic diagram of the structure of another polarization beam splitter prism that can implement the embodiment of the present application is shown.

[0043] like Figure 2 and Figure 3 As shown, PBS is made of two high-precision right-angle prisms glued together, the oblique surfaces of the two right-angle prisms are attached to each other, and a polarization splitting medium film is set on the hypotenuse of the right-angle prism. The polarization splitting medium film is configured to transmit P polarized light (first polarized light) and reflect S polarized light (second polarized light). The surface with the polarization splitting medium film is called the polarization splitting plane, and the angle between the incident light and the polarization splitting plane is 45°. The other surfaces of the prism and all surfaces of the other prism are coated with anti-reflection film.

[0044] It should be noted that, in some embodiments, the polarization splitting medium film is configured to transmit S-polarized light and reflect P-polarized light, which is not specifically limited in the embodiments of the present application.

[0045] like Figure 2 and Figure 3In the embodiment shown, the PBS has at least one light incident surface and two light emitting surfaces. By way of example, in the present application, the light emitting surface located in the first direction (the direction of the horizontal plane, that is, the x-axis direction) is called the first light emitting surface, and the light emitting surface located in the second direction (the direction perpendicular to the horizontal plane, that is, the y-axis direction) is called the second light emitting surface. The first direction is perpendicular to the second direction.

[0046] The first light incident surface is arranged opposite to the first light emitting surface, and the second light incident surface is arranged opposite to the second light emitting surface. Incident light enters the PBS from the two light incident surfaces, and after being polarized by the PBS, is emitted from the two light emitting surfaces.

[0047] Optionally, in Figure 1 In the illustrated embodiment, the first plane reflector 102 is disposed in a first direction (horizontal plane direction), and the first plane reflector 102 forms an angle of 45° with the first light emitting surface of the PBS, that is, the first plane reflector 102 is parallel to the polarization splitting surface of the PBS in the first direction;

[0048] The second plane reflector 103 is arranged in the second direction, and the second plane reflector 103 and the second light emitting surface of the PBS form an angle of 45°, that is, the second plane reflector 103 is parallel to the polarization splitting surface of the PBS in the second direction;

[0049] It can be seen that Figure 1 In the illustrated embodiment, the first plane reflector and the second plane reflector are respectively located on both sides of the two light emitting surfaces of the PBS.

[0050] The third plane reflector 104 is arranged on the light output path of the second plane reflector 103, that is, the third plane reflector 104 is located at the intersection of the central axis of the second plane reflector 103 in the first direction and the central axis of the first plane reflector 102 in the second direction, and the third plane reflector 104 forms an angle of 45° with the second plane reflector 103. At the same time, the third plane reflector 104 also forms an angle of 45° with the first plane reflector 102.

[0051] The right angle reflector is arranged on the edge formed by the quadrilateral first plane reflector 102 and the third plane reflector 104, that is, the right angle reflector is located between the first plane reflector 102 and the third plane reflector 104, the fourth plane reflector 105 in the right angle reflector is parallel to the first plane reflector 102, and the fifth plane reflector 106 is parallel to the third plane reflector 104.

[0052] The following pair Figure 1 The light combining process of the light combining component in the illustrated embodiment is introduced in detail.

[0053] Specifically, the light emitted from the first light source assembly and the second light source assembly is incident on the PBS, and the PBS splits the incident light, with one part being emitted from the first light emitting surface and the other part being emitted from the second light emitting surface. The light emitted from the first light emitting surface is reflected by the first plane reflector 102 and reaches the fourth plane reflector 105, and then is reflected by the fourth plane reflector 105 and then is emitted in the first direction. The light emitted from the second splitting surface is first reflected by the second plane reflector 103 and reaches the third plane reflector 104, and then is reflected by the third plane reflector 104 and reaches the fifth plane reflector 106, and finally is reflected by the fifth plane reflector 106 and then is emitted in the first direction.

[0054] The above description is about the combined light being emitted along the first direction, and the following description is about the combined light being emitted along the second direction. Figure 4 . Figure 4 Another schematic diagram of the structure of a light combining component that can implement the embodiment of the present application is shown. Figure 4 The light combining component 10 shown includes: a polarization beam splitter prism 101, a first plane reflector 102, a second plane reflector 103, a third plane reflector 104, a fourth plane reflector 105 and a fifth plane reflector 106. Among them, one end of the fourth plane reflector 105 and one end of the fifth plane reflector 106 are glued together to form a right-angle reflector. The polarization beam splitter prism (polarization beam splitter, PBS) 101 and the first plane reflector 102, the second plane reflector 103 and the third plane reflector 104 are respectively arranged at the four vertices of the quadrilateral formed by the light combining component. The right-angle reflector can be arranged on any side of the quadrilateral, and the two reflecting surfaces of the right-angle reflector are respectively parallel to the polarization beam splitter prism or the plane reflector on the two vertices corresponding to the side. For example, the right-angle reflector is disposed on the edge of a quadrilateral formed by the first plane reflector 102 and the third plane reflector 104 , and then the two reflecting surfaces of the right-angle reflector are parallel to the first plane reflector 102 and the third plane reflector 104 , respectively.

[0055] If the right-angle reflector is disposed on the edge of the quadrilateral formed by the second plane reflector 103 and the third plane reflector 104, then the two reflecting surfaces of the right-angle reflector are parallel to the second plane reflector 103 and the third plane reflector 104 respectively.

[0056] If the right-angle reflector is disposed on the edge of the quadrilateral formed by the PBS and the first plane reflector 102, then the two reflecting surfaces of the right-angle reflector are parallel to the first plane reflector 102 and the PBS, respectively.

[0057] It should be noted that the quadrilateral formed by the light combining components in the embodiment of the present application is a virtual space, not a real quadrilateral, and is only used to illustrate the spatial positions of the polarization splitter prism 101 and the first plane reflector 102, the second plane reflector 103 and the third plane reflector 104.

[0058] For example, in Figure 4 In the illustrated embodiment, the right-angle reflector is located on the edge of a quadrilateral formed by the second plane reflector 103 and the third plane reflector 104, and of the two reflecting surfaces of the right-angle reflector (the fourth plane reflector 105 and the fifth plane reflector 106), the fourth plane reflector 105 is parallel to the second plane reflector 103, and the fifth plane reflector 106 is parallel to the third plane reflector 104.

[0059] Specifically, the light emitted from the first light source assembly and the second light source assembly is incident on the PBS, and the PBS splits the incident light, with one part being emitted from the first light emitting surface and the other part being emitted from the second light emitting surface. The light emitted from the first light emitting surface is reflected by the first plane reflector 102, reaches the third plane reflector 104, and then reaches the fifth plane reflector 106, and then is reflected by the fifth plane reflector 106 and then emitted in the second direction. The light emitted from the second splitting surface is reflected by the second plane reflector 103, reaches the fourth plane reflector 105, and then is reflected by the fourth plane reflector 105 and then emitted in the second direction.

[0060] It should be noted that in the embodiment of the present application, each plane reflector reflects light at 45°. The angle can be adjusted as needed in actual design. The embodiment of the present application does not impose any specific limitation on the angle of light reflected by the plane reflector.

[0061] It should also be noted that the light combining process in the above embodiments is based on Figure 2 The PBS shown in the figure is used as an example. When the PBS structure is as Figure 3 The difference is that the orientation of the related components has changed. Specifically, the Figure 3 When the PBS structure is shown, Figure 1 and Figure 4 In the embodiment, the second plane reflector 103 , the third plane reflector 104 and the right-angle reflector need to be moved above the polarization beam splitter prism 101 . Other principles are similar and will not be described in detail here.

[0062] The present application also discloses an illumination module, which includes a light source assembly and a light combining assembly described in any of the above embodiments. The light source assembly is located on the light incident surface side of the PBS, and the light source assembly includes a light source of at least one color. The light source color in the embodiment of the present application is a color perceived by the human eye, such as red, green, blue, yellow, cyan, purple, white, etc.

[0063] 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.

[0064] In the embodiments of the present application, the light source assembly may be one or two. When there is one light source assembly, the light source assembly may be located on one side of the first light incident surface or the second light incident surface. When there are two light source assemblies, the two light source assemblies are respectively arranged on the sides where the two light incident surfaces are located. Exemplarily, the two light source assemblies are respectively a first light source assembly and a second light source assembly. The first light source assembly is located on the side of the first light incident surface of the PBS (the side away from the first light emitting surface), and the first light incident surface is arranged opposite to the first light emitting surface. The second light source assembly is located on the side of the second light incident surface of the PBS (the side away from the second light emitting surface), and the second light incident surface is arranged opposite to the second light emitting surface.

[0065] 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.

[0066] Optionally, 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.

[0067] The outgoing light of the first light source assembly is incident on the PBS from the first light incident surface, and is divided into P polarized light and S polarized light by the PBS. The P polarized light is transmitted through the polarization splitting surface and emerges from the first light exiting surface, and the S polarized light is reflected by the polarization splitting surface and emerges from the second light exiting surface.

[0068] The output light of the second light source assembly is incident on the PBS from the second light incident surface, and is divided into P polarized light (vibration direction is parallel to the incident surface) and S polarized light (vibration direction is perpendicular to the incident surface) by the PBS. The P polarized light is transmitted through the polarization splitting surface and is emitted from the second light output surface, and the S polarized light is reflected through the polarization splitting surface and is emitted from the first light output surface.

[0069] The following is a detailed description of the light source components in the lighting module. Figure 5 and Figure 6 . Figure 5 A schematic diagram of the structure of a lighting module that can implement the embodiment of the present application is shown. Figure 6A schematic diagram of the structure of another lighting module that can implement the embodiment of the present application is shown.

[0070] Figure 5 The lighting module shown includes: a light combining assembly 10, 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 5 The right-angle reflecting mirror 107 in the embodiment is composed of the fourth plane reflecting mirror 105 and the fifth plane reflecting mirror 106 in the above-mentioned embodiment.

[0071] For example, in Figure 5 In the illustrated embodiment, the first light source assembly 20 includes a red LED light source (R-LED) and a blue LED light source (B-LED), and the second light source assembly 30 includes a green LED light source (G-LED). Since the LED light source is a non-polarized light source, the light emitted by each color of the LED light source is divided into P-polarized light and S-polarized light when passing through the PBS, that is, half of the light is emitted from the first light emitting surface, and half of the light is emitted from the second light emitting surface. Specifically, after the red light emitted by the R-LED and the blue light emitted by the B-LED are polarized by the PBS, the P-polarized light is emitted from the first light emitting surface of the PBS, and the S-polarized light is emitted from the second light emitting surface of the PBS; after the green light emitted by the G-LED is polarized by the PBS, the P-polarized light is emitted from the second light emitting surface of the PBS, and the S-polarized light is emitted from the first light emitting surface of the PBS. It can be understood that the red, green and blue LED light sources can also be arranged in one light source assembly.

[0072] like Figure 5 As shown, since the divergence angle of the LED light source is relatively large, the light source assembly may further include a lens group for converging and collimating the output light of the LED light source.

[0073] LED light source is a wide spectrum light source. Figure 5 The light combining method provided in the illustrated embodiment can reduce energy loss caused by spectral overlap, 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.

[0074] Figure 6 The lighting module shown includes: a light combining assembly 10, 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 6 The right-angle reflecting mirror 107 in the embodiment is composed of the fourth plane reflecting mirror 105 and the fifth plane reflecting mirror 106 in the above-mentioned embodiment.

[0075] For example, Figure 6In the illustrated embodiment, the first light source assembly 20 and the second light source assembly 30 include at least one light source of the same or similar color, and the types of the same-color light sources in the first light source assembly 20 and the second light source assembly 30 may be the same or different. For example, the first light source assembly 20 includes a green laser light source, and the second light source assembly includes a green LED light source; for another example, the first light source assembly includes a 613nm red laser light source, and the second light source assembly includes a 640nm red laser light source.

[0076] For example, Figure 6 In the illustrated embodiment, the first light source assembly 20 is a laser light source assembly, and the first light source assembly 20 includes a red laser light source (R-LD), a green laser light source (G-LD) and a blue laser light source (B-LD). The three-color laser light sources constitute an integrated light source, and the laser light emitted by the integrated light source is incident on the polarization splitting surface through the first incident surface after passing through the light homogenizer. Exemplarily, R-LD is P polarized light (P polarization state is dominant), G-LD and B-LD are S polarized light (S polarization state is dominant), then most of the red laser light emitted by R-LD is transmitted through the polarization splitting surface and then emitted from the first light-emitting surface, and a small part is reflected from the polarization splitting surface and then emitted from the second light-emitting surface; most of the green laser light emitted by G-LD and the blue laser light emitted by B-LD are reflected from the polarization splitting surface and then emitted from the second light-emitting surface, and a small part is transmitted through the polarization splitting surface and then emitted from the first light-emitting surface.

[0077] The second light source assembly 30 is an LED light source assembly, which includes a red LED light source (R-LED), a green LED light source, and a blue LED light source. The light emitted by each color LED light source is divided into P polarized light and S polarized light after being split by the PBS, wherein the P polarized light is transmitted by the polarization splitting surface and emitted from the second light emitting surface, and the S polarized light is reflected by the polarization splitting surface and emitted from the first light emitting surface. Figure 6 As shown, the three-color LED light source in the second light source assembly 30 is a split light source.

[0078] like Figure 6 As shown, the first light source assembly also includes a light homogenizer arranged in the light emitting direction of the light source, which is used to homogenize the laser to weaken the coherence of the laser and achieve the purpose of suppressing laser speckle.

[0079] The second light source assembly also includes a dichroic mirror and a lens group. The dichroic mirror is used to combine light from three separate LED light sources, and the lens group is used to converge or collimate the light.

[0080] pass Figure 6 The light combining method provided in the illustrated embodiment combines light sources of the same color, which 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 lighting efficiency and output luminous flux.

[0081] As required, a collimating component, a light homogenizing component or a relay component may be provided on the light-emitting side of the combined light beam in the lighting module to further process the combined light beam.

[0082] The present application also provides an optical device, see Figure 7 . Figure 7 A schematic diagram of the structure of an optical device that can implement an embodiment of the present application is shown. Figure 7 The optical device shown is a projection device, and the optical device includes: the illumination module 701, the light modulation module 702 and the imaging module 703 described in any of the above embodiments. The illumination light emitted by the illumination module 701 is modulated by the light modulation module 702 (digital micromirror element or silicon-based liquid crystal or liquid crystal display), and then amplified by the imaging module 703 and projected to form a projection picture.

[0083] 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.

[0084] 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.

[0085] 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 component, characterized in that: include: A polarization beam splitter prism, a first plane reflector, a second plane reflector, a third plane reflector, and a right-angle reflector; Wherein, the polarization beam splitting prism comprises a polarization beam splitting surface; The polarization beam splitter prism and the first plane reflector, the second plane reflector and the third plane reflector are respectively arranged at the four vertex positions of a virtual space quadrilateral; The right-angle reflector is arranged on any side of the virtual space quadrilateral, and two reflection surfaces of the right-angle reflector are respectively parallel to the polarization splitting surfaces of the polarization splitting prism or the plane reflector at the two vertices of the side where the right-angle reflector is located.

2. The light combining assembly according to claim 1, characterized in that: The polarization beam splitter prism and the third plane reflector are located on a diagonal line of the virtual space quadrilateral, and the first plane reflector and the second plane reflector are located on another diagonal line of the virtual space quadrilateral.

3. The light combining assembly according to claim 1, characterized in that: The polarization beam splitter prism comprises at least one light incident surface and two light emitting surfaces; the first plane reflector and the second plane reflector are respectively located on both sides of the two light emitting surfaces; The polarization beam splitter prism splits the incident light into two mutually perpendicular directions; The first plane reflector, the second plane reflector and the third plane reflector respectively reflect the outgoing light in the two mutually perpendicular directions to the two surfaces of the right-angle reflector, and the two surfaces of the right-angle reflector respectively reflect the two beams of light out in the same direction.

4. The light combining assembly according to any one of claims 1 to 3, characterized in that: The polarization beam splitter prism comprises two right-angle prisms, and the inclined surfaces of the two right-angle prisms are attached to each other; A polarization splitting medium film is arranged on the hypotenuse of the right-angle prism to form the polarization splitting plane, and the polarization splitting medium film transmits the first polarized light and reflects the second polarized light or transmits the second polarized light and reflects the first polarized light; After the incident light is incident on the polarization beam splitter prism, it is polarized by the polarization beam splitter prism, and the polarized incident light is emitted from the corresponding light emitting surface according to its polarization state.

5. The light combining assembly according to any one of claims 1 to 3, characterized in that: The first plane reflector and the second plane reflector are respectively arranged parallel to the polarization splitting surface.

6. The light combining assembly according to any one of claims 1 to 3, characterized in that: The right-angle reflector includes a fourth plane reflector and a fifth plane reflector; One end of the fourth plane reflecting mirror and one end of the fifth plane reflecting mirror are glued together.

7. A lighting module, characterized in that: The lighting module comprises: a light source assembly and a light combining assembly as claimed in any one of claims 1 to 6; The light source assembly is located on the light incident surface side of the polarization beam splitter prism. The light source assembly includes a light source of at least one color, and the light source is a laser light source or an LED light source.

8. The lighting module according to claim 7, characterized in that: The number of the light source components is one or two; If there is one light source assembly, the light source assembly includes light sources of the same type or different types; If there are two light source assemblies, each light source assembly includes the same light source type or different light source types; Wherein, the light source types include integrated light sources and discrete light sources.

9. The lighting module according to claim 8, characterized in that: The light source assembly includes a broad spectrum light source, or the light source assembly includes 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