CN222299938U - Light combination assembly, lighting module and optical equipment - Google Patents
Light combination assembly, lighting module and optical equipment Download PDFInfo
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- CN222299938U CN222299938U CN202421155607.2U CN202421155607U CN222299938U CN 222299938 U CN222299938 U CN 222299938U CN 202421155607 U CN202421155607 U CN 202421155607U CN 222299938 U CN222299938 U CN 222299938U
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Abstract
The application discloses a light combining component, a lighting module and optical equipment, wherein the light combining component comprises a polarization splitting prism, a first plane reflector, a second plane reflector, a third plane reflector and a right angle reflector, wherein the polarization splitting prism comprises a polarization splitting surface, the polarization splitting prism, the first plane reflector, the second plane reflector and the third plane reflector are respectively arranged at four vertex positions of a virtual space quadrangle, the right angle reflector is arranged on any side of the virtual space quadrangle, and two reflecting surfaces of the right angle reflector are respectively parallel to the polarization splitting surfaces or the plane reflectors of the polarization splitting prism on two vertexes of the side where the right angle reflector is arranged. Thereby reducing energy loss caused by spectrum overlapping or perforation, improving the energy utilization rate of the light source, and further achieving the purpose of improving the light efficiency and the output luminous flux of the whole machine.
Description
Technical Field
The application relates to the technical field of projection equipment, in particular to a light combining component, a lighting module and optical equipment.
Background
At present, the light sources in the projection scheme in the prior art can be pure laser light sources, pure LED light sources and mixed light sources, wherein the pure laser light sources refer to all illumination light sources as laser light sources, the pure LED light sources refer to all illumination light sources as LED light sources, and the mixed light sources refer to illumination light sources including both laser light sources and LED light sources. The illumination light sources of the light source comprise at least three different-color light sources, and the light rays emitted by the light sources with different colors need to be irradiated onto the spatial light modulation device after being combined, modulated by the spatial light modulation device and projected out through the projection lens to form a projection picture.
The common light combining modes in the related art are mainly wavelength light combining and position light combining. The wavelength light combining is performed by utilizing the wavelength difference, and the main devices used are a dichroic mirror, a band-pass filter, and the like. The position light combination is to combine light by utilizing the difference of the positions of different light sources, such as using a reflecting mirror with an opening, so that the light of one light source is transmitted through the central hole, and the light of the other light source is reflected out from the area outside the opening.
The position light is combined, and reflected light rays entering the position of the central hole are totally lost due to the existence of the central hole; and the light with the wavelength, especially the light with the broad spectrum light source or the light with the same or similar color, since the spectrum overlap ratio of the two is very high, the light energy at the spectrum overlap portion is often not used when the light is combined. Thereby causing a problem of low light combining efficiency.
The description of the background art is only for the purpose of facilitating an understanding of the relevant art and is not to be taken as an admission of prior art.
Disclosure of Invention
The embodiment of the application aims to provide a light combining component, a lighting module and optical equipment, wherein the light combining component is formed by adopting a polarization beam splitter prism and a plane reflector, so that the energy loss caused by spectrum overlapping or perforation can be reduced, the energy utilization rate of a light source is improved, and the purposes of improving the light efficiency and the output luminous flux of the whole machine are further achieved.
In a first aspect, the embodiment of the application provides a light combining component, which comprises a polarization splitting prism, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror and a right angle reflecting mirror, wherein the polarization splitting prism comprises a polarization splitting surface, the polarization splitting prism, the first plane reflecting mirror, the second plane reflecting mirror and the third plane reflecting 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 or the plane reflecting mirrors of the polarization splitting prisms on two vertexes of the sides of the right angle reflecting mirror.
Optionally, the polarization splitting prism and the third plane mirror are located on one diagonal line of the virtual space quadrangle, and the first plane mirror and the second plane mirror are located on the other diagonal line of the virtual space quadrangle.
Optionally, the polarization beam splitter prism comprises at least one light incident surface and two light emergent surfaces, wherein the first plane reflector and the second plane reflector are respectively positioned at two sides of the two light emergent surfaces;
The first plane reflector, the second plane reflector and the third plane reflector reflect the emergent light in the two mutually perpendicular directions to two surfaces of the right-angle reflector respectively, and the two surfaces of the right-angle reflector reflect the two beams of light in the same direction respectively.
Optionally, the polarization beam splitting prism comprises two right angle prisms, inclined planes of the two right angle prisms are mutually attached, a polarization beam splitting medium film is arranged on a hypotenuse of each right angle prism to form the polarization beam splitting surface, the polarization beam splitting medium film transmits first polarized light, reflects second polarized light or transmits second polarized light and reflects first polarized light, after incident light is incident on the polarization beam splitting prism, the incident light is polarized by the polarization beam splitting prism, and the polarized incident light exits from the corresponding light emergent surface according to different polarization states of the incident light.
Optionally, the first plane mirror and the second plane mirror are respectively disposed parallel to the polarization splitting surface.
Optionally, the right angle reflector includes a fourth plane reflector and a fifth plane reflector;
one end of the fourth plane mirror and one end of the fifth plane mirror are glued together.
In a second aspect, the embodiment of the application provides a lighting module, which comprises a light source assembly and the light combining assembly according to any one of the first aspect, wherein the light source assembly is positioned at one side of the light incident surface of the polarization splitting prism, the light source assembly comprises at least one color light source, and the light source is a laser light source or an LED light source.
Optionally, the number of the light source assemblies is one or two, if the number of the light source assemblies is one, the light source assemblies comprise the same light source type or different light source types, if the number of the light source assemblies is two, each light source assembly comprises the same light source type or different light source types, and the light source types comprise an integrated light source and a discrete light source.
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.
In a third aspect, the embodiment of the application provides an optical device, which comprises a light modulation module, an imaging module and the illumination module according to any one of the embodiments of the second aspect, wherein illumination light emitted by the illumination module is modulated by the light modulation module and then amplified by the imaging module to be projected out to form a projection picture.
Additional optional features and technical effects of embodiments of the application are described in part below and in part will be apparent from reading the disclosure herein.
Drawings
Embodiments of the present application will hereinafter be described in conjunction with the appended drawings, wherein like or similar reference numerals denote like or similar elements, and wherein:
FIG. 1 is a schematic diagram of a light combining component in which embodiments of the present application may be implemented;
FIG. 2 shows a schematic diagram of a polarization splitting prism in which embodiments of the present application may be implemented;
FIG. 3 is a schematic diagram of another polarization splitting prism structure in which embodiments of the present application may be implemented;
FIG. 4 is a schematic diagram of another light combining component structure in which embodiments of the present application may be implemented;
FIG. 5 illustrates a schematic diagram of a lighting module architecture in which an embodiment of the application may be implemented;
FIG. 6 shows a schematic diagram of another lighting module configuration in which embodiments of the application may be implemented;
Fig. 7 shows a schematic diagram of an optical device in which an embodiment of the application may be implemented.
The light source device is characterized by comprising a 10-light combination component, a 20-first light source component, a 30-second light source component, a 101-polarization beam splitter prism, a 102-first plane mirror, a 103-second plane mirror, a 104-third plane mirror, a 105-fourth plane mirror, a 106-fifth plane mirror and a 107-right angle mirror.
Detailed Description
The present application will be described in further detail with reference to the following detailed description and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. The exemplary embodiments of the present application and the descriptions thereof are used herein to explain the present application, but are not intended to limit the application.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
In the embodiment of the application, the polarization beam splitter prism and the plane reflecting mirror are adopted to form the light combining component, so that the energy loss caused by spectrum overlapping or perforation can be reduced, the energy utilization rate of the light source is improved, and the purposes of improving the light efficiency and the output luminous flux of the whole machine are achieved. The light combining element is described below with reference to specific embodiments.
Fig. 1 shows a schematic structure of a light combining component in which an embodiment of the present application may be implemented. The light combining module 10 shown in fig. 1 includes a polarization splitting prism 101, a first plane mirror 102, a second plane mirror 103, a third plane mirror 104, a fourth plane mirror 105, and a fifth plane mirror 106. Wherein one end of the fourth plane mirror 105 and one end of the fifth plane mirror 106 are glued together to form a right angle mirror. The polarization splitting prism (polarizationbeam splitter, PBS) 101 and the first, second and third plane mirrors 102, 103, 104 are respectively disposed at four vertex positions of a quadrangle formed by the light combining means.
Alternatively, the polarization splitting prism and the third plane mirror are located on one diagonal of the quadrangle, and the first plane mirror and the second plane mirror are located on the other diagonal of the quadrangle.
The right angle reflector may be disposed on any one side of the quadrangle, and the two reflecting surfaces of the right angle reflector are parallel to the polarized light splitting surfaces or plane reflectors of the polarized light splitting prisms on the two vertices corresponding to the side where the two reflecting surfaces are disposed. For example, the right angle mirror is disposed on a quadrangular side formed by the first plane mirror 102 and the third plane mirror 104, and then two reflection surfaces of the right angle mirror are parallel to the first plane mirror 102 and the third plane mirror 104, respectively.
If the right angle mirror is disposed on a quadrangular side constituted by the second plane mirror 103 and the third plane mirror 104, the two reflection surfaces of the angle mirror are parallel to the second plane mirror 103 and the third plane mirror 104, respectively.
If the right angle mirror is disposed on a quadrilateral side formed by the PBS and the first planar mirror 102, then the two reflective surfaces of the angle mirror are parallel to the polarized facets of the first planar mirror 102 and the PBS, respectively.
Similarly, if the right angle mirror is disposed on a quadrilateral side formed by the PBS and the second planar mirror, then the two reflective surfaces of the corner mirror are parallel to the polarized facets of the second planar mirror and the PBS, respectively.
Note that, in the embodiment of the present application, the quadrangle formed by the light combining component is a virtual space, and is not a true quadrangle, but is merely for illustrating the spatial positions of the polarization splitting prism 101 and the first plane mirror 102, the second plane mirror 103, and the third plane mirror 104.
Illustratively, in the embodiment shown in fig. 1, the right angle mirror is on the side of the quadrilateral formed by the first planar mirror 102 and the third planar mirror 104, and of the two reflecting surfaces of the right angle mirror (the fourth planar mirror 105 and the fifth planar mirror 106), the fourth planar mirror 105 is parallel to the first planar mirror 102, and the fifth planar mirror 106 is parallel to the third planar mirror 104.
Specifically, in the embodiment shown in fig. 1, the outgoing light of the first light source component and the outgoing light of the second light source component are incident to the PBS, the PBS splits the incident light into two directions perpendicular to each other and outputs the two directions of outgoing light respectively through the first plane mirror 102, the second plane mirror 103 and the third plane mirror 104, the two directions of outgoing light in the perpendicular directions are respectively reflected onto two faces of the right angle mirror, and finally the two directions of outgoing light are respectively reflected out by two faces of the right angle mirror (the fourth plane mirror 105 and the fifth plane mirror 106) along the horizontal plane direction, so as to realize light combination.
In the embodiment shown in fig. 1, the two directions perpendicular to each other are a horizontal plane direction (a first direction) and a direction perpendicular to the horizontal plane (a second direction), and the embodiment of the present application is not limited to the two directions perpendicular to each other.
The polarizing beam splitter prism in the light combining module is described in detail below with reference to fig. 2 and 3. Fig. 2 shows a schematic diagram of a polarizing beam-splitting prism structure in which an embodiment of the present application may be implemented, and fig. 3 shows a schematic diagram of another polarizing beam-splitting prism structure in which an embodiment of the present application may be implemented.
As shown in fig. 2 and 3, the PBS is formed by gluing two high-precision right-angle prisms, inclined surfaces of the two right-angle prisms are mutually attached, wherein a polarization splitting medium film is disposed on a 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), a surface on which the polarization splitting medium film is disposed is called a polarization splitting surface, and an included angle between incident light and the polarization splitting surface is 45 °. Other surfaces of the prism and all surfaces of the other prism are plated with antireflection films.
It should be noted that, in some embodiments, the polarization splitting dielectric film is configured to transmit S polarized light and reflect P polarized light, and embodiments of the present application are not particularly limited.
As shown in the embodiment of fig. 2 and 3, the PBS has at least one light incident surface and two light emergent surfaces, and in the present application, the light emergent surface located in the first direction (i.e., the horizontal plane direction, i.e., the x-axis direction) is referred to as a first light emergent surface, and the light emergent surface located in the second direction (i.e., the direction perpendicular to the horizontal plane, i.e., the y-axis direction) is referred to as a second light emergent surface, where the first direction is perpendicular to the second direction.
The first light incident surface is opposite to the first light emergent surface, and the second light incident surface is opposite to the second light emergent surface. Incident light enters the PBS from the two light-in surfaces, is polarized by the PBS, and then exits from the two light-out surfaces.
Optionally, in the embodiment shown in fig. 1, the first plane mirror 102 is disposed in a first direction (in a horizontal plane direction), and the first plane mirror 102 forms an angle of 45 ° with the first light-emitting surface of the PBS, that is, the first plane mirror 102 is parallel to the polarization beam-splitting surface of the PBS in the first direction;
The second plane mirror 103 is disposed in the second direction, and the second plane mirror 103 forms an included angle of 45 ° with the second light-emitting surface of the PBS, that is, the second plane mirror 103 is parallel to the polarization splitting surface of the PBS in the second direction;
It can be seen that in the embodiment shown in fig. 1, the first planar mirror and the second planar mirror are located on either side of the two light-emitting surfaces of the PBS, respectively.
The third plane mirror 104 is disposed on the light emitting path of the second plane mirror 103, that is, the third plane mirror 104 is located at the intersection point of the central axis of the second plane mirror 103 in the first direction and the central axis of the first plane mirror 102 in the second direction, and an included angle of 45 ° is formed between the third plane mirror 104 and the second plane mirror 103, and meanwhile, an included angle of 45 ° is formed between the third plane mirror 104 and the first plane mirror 102.
The right angle mirror is disposed on the side formed by the quadrangular first plane mirror 102 and the third plane mirror 104, that is, the right angle mirror is disposed between the first plane mirror 102 and the third plane mirror 104, the fourth plane mirror 105 of the right angle mirror is parallel to the first plane mirror 102, and the fifth plane mirror 106 is parallel to the third plane mirror 104.
The following describes the light combining process of the light combining component in the embodiment shown in fig. 1 in detail.
Specifically, the outgoing light of the first light source assembly and the second light source assembly is incident to the PBS, the PBS splits the incident light, one part of the outgoing light exits from the first light exit surface, and the other part of the outgoing light exits from the second light exit surface. The light emitted from the first light emitting surface is reflected by the first plane mirror 102, reaches the fourth plane mirror 105, and is emitted in the first direction after being reflected by the fourth plane mirror 105. The light emitted from the second light splitting surface is reflected by the second plane mirror 103 to reach the third plane mirror 104, reflected by the third plane mirror 104 to reach the fifth plane mirror 106, and finally reflected by the fifth plane mirror 106 to be emitted along the first direction.
The above description of the emission of the collimated light in the first direction is given, and the following description of the emission of the collimated light in the second direction is given, see fig. 4. Fig. 4 is a schematic structural diagram of another light combining component in which an embodiment of the present application may be implemented. The light combining unit 10 shown in fig. 4 includes a polarization splitting prism 101, a first plane mirror 102, a second plane mirror 103, a third plane mirror 104, a fourth plane mirror 105, and a fifth plane mirror 106. Wherein one end of the fourth plane mirror 105 and one end of the fifth plane mirror 106 are glued together to form a right angle mirror. The polarization splitting prism (polarizationbeam splitter, PBS) 101 and the first, second and third plane mirrors 102, 103, 104 are respectively disposed at four vertex positions of a quadrangle formed by the light combining means. The right angle reflector can be arranged on any side of the quadrangle, and two reflecting surfaces of the right angle reflector are respectively parallel to the polarization beam splitter prism or the plane reflector on two vertexes corresponding to the side where the two reflecting surfaces are arranged. For example, the right angle mirror is disposed on a quadrangular side formed by the first plane mirror 102 and the third plane mirror 104, and then two reflection surfaces of the right angle mirror are parallel to the first plane mirror 102 and the third plane mirror 104, respectively.
If the right angle mirror is disposed on a quadrangular side constituted by the second plane mirror 103 and the third plane mirror 104, the two reflection surfaces of the angle mirror are parallel to the second plane mirror 103 and the third plane mirror 104, respectively. .
If the right angle mirror is disposed on a quadrilateral side formed by the PBS and the first planar mirror 102, then the two reflective surfaces of the corner mirror are parallel to the first planar mirror 102 and the PBS, respectively.
Note that, in the embodiment of the present application, the quadrangle formed by the light combining component is a virtual space, and is not a true quadrangle, but is merely for illustrating the spatial positions of the polarization splitting prism 101 and the first plane mirror 102, the second plane mirror 103, and the third plane mirror 104.
Illustratively, in the embodiment shown in fig. 4, the right angle mirror is on the side of the quadrangle formed by the second plane mirror 103 and the third plane mirror 104, and of the two reflecting surfaces (the fourth plane mirror 105 and the fifth plane mirror 106) of the right angle mirror, the fourth plane mirror 105 and the second plane mirror 103 are parallel, and the fifth plane mirror 106 is parallel to the third plane mirror 104.
Specifically, the outgoing light of the first light source assembly and the second light source assembly is incident to the PBS, the PBS splits the incident light, one part of the outgoing light exits from the first light exit surface, and the other part of the outgoing light exits from the second light exit surface. The light emitted from the first light emitting surface is reflected by the first plane mirror 102, then reaches the third plane mirror 104, then reaches the fifth plane mirror 106, and then is reflected by the fifth plane mirror 106 to be emitted along the second direction. The light emitted from the second light splitting surface is reflected by the second plane mirror 103, reaches the fourth plane mirror 105, and is reflected by the fourth plane mirror 105 to be emitted in the second direction.
It should be noted that, in the embodiment of the present application, each plane mirror reflects light at 45 °, and the angle may be adjusted according to needs in practical design.
It should be further noted that, in the light combining process of the foregoing embodiment, the PBS shown in fig. 2 is taken as an example, when the PBS structure is shown in fig. 3, the difference is that the orientation of the relevant devices is changed, specifically, when the PBS structure shown in fig. 3 is adopted, the second plane mirror 103, the third plane mirror 104 and the right angle mirror in the embodiments shown in fig. 1 and fig. 4 need to be moved above the polarization beam splitter prism 101, and other principles are similar and are not repeated herein.
The embodiment of the application also discloses a lighting module which comprises a light source assembly and the light combination assembly in any one of the embodiments. The light source component is positioned on one side of the light incident surface of the PBS and comprises at least one color light source. The light source color in the embodiment of the application is the color perceived by human eyes, such as red, green, blue, yellow, cyan, purple, white and the like.
Specifically, according to different types of the light source assembly, the light source assembly can further comprise lenses, light homogenizing sheets and other optical components. The light source type herein mainly refers to the light emitting basis and the packaging manner of the light source. For example, the light source can be divided into a laser light source and an LED light source according to a luminous basis, and can be divided into an integrated light source and a discrete light source according to a packaging mode.
In an embodiment of the present application, the number of the light source assemblies may be one or two, when the number of the light source assemblies is one, the light source assemblies may be located at one side of the first light incident surface or the second light incident surface, when the number of the light source assemblies is two, the two light source assemblies are respectively located at the sides of the two light incident surfaces, and in an exemplary embodiment, 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 at one side (a side far away from the first light emitting surface) of the PBS, the first light incident surface is opposite to the first light emitting surface, and the second light source assembly is located at one side (a side far away from the second light emitting surface) of the PBS, where the second light incident surface is opposite to the second light emitting surface.
It should be noted that the same light source assembly may include the same light source type or different light source types. The different light source modules may comprise the same light source type or different light source types.
Optionally, the first light source assembly and the second light source assembly each include at least one color light source, for example, the first light source assembly includes one color light source, and the second light source assembly includes one, two, three, or the like light sources. When the first light source assembly includes two light sources with different colors, the second light source assembly includes one, two, three, or the like light source colors, and the number of light source colors included in the light source assembly is not particularly limited in the embodiment of the present application.
The emergent light of the first light source assembly enters the PBS from the first light inlet surface, is divided into P polarized light and S polarized light by the PBS, the P polarized light is transmitted by the polarized light splitting surface and exits from the first light outlet surface, and the S polarized light is reflected by the polarized light splitting surface and exits from the second light outlet surface.
The emergent light of the second light source assembly enters the PBS from the second light incident surface, is divided into P polarized light (the vibration direction is parallel to the incident surface) and S polarized light (the vibration direction is perpendicular to the incident surface) by the PBS, the P polarized light is transmitted by the polarized light splitting surface and exits from the second light emergent surface, and the S polarized light is reflected by the polarized light splitting surface and exits from the first light emergent surface.
The light source assembly in the lighting module is described in detail below with reference to fig. 5 and 6. Fig. 5 shows a schematic diagram of a lighting module structure in which an embodiment of the application may be implemented. Fig. 6 shows a schematic diagram of another lighting module structure in which an embodiment of the application may be implemented.
The illumination module shown in fig. 5 includes a light combining assembly 10, a first light source assembly 20, and a second light source assembly 30. Here, the light combining component 10 is the same as the above embodiment, and the description is omitted here, and it is to be noted that the right angle mirror 107 in fig. 5 is formed by the fourth plane mirror 105 and the fifth plane mirror 106 in the above embodiment.
Illustratively, in the embodiment shown in FIG. 5, the first light source assembly 20 includes a red LED light source (R-LED) and a blue LED light source (B-LED) therein, and the second light source assembly 30 includes a green LED light source (G-LED) therein. Since the LED light sources are unpolarized light sources, the LED light sources of each color emit light that is split into P-polarized light and S-polarized light when passing through the PBS, i.e., half of the light exits the first light exit surface and half of the light exits the second light exit surface. Specifically, after red light emitted by the R-LED and blue light emitted by the B-LED are polarized by the PBS, P polarized light is emitted from a first light emitting surface of the PBS, S polarized light is emitted from a second light emitting surface of the PBS, green light emitted by the G-LED is polarized by the PBS, P polarized light is emitted from the second light emitting surface of the PBS, and S polarized light is emitted from the first light emitting surface of the PBS. It will be appreciated that the red, green and blue LED light sources may also be provided in a single light source assembly.
As shown in fig. 5, since the divergence angle of the LED light source is large, a lens group may be further included in the light source assembly for converging and collimating the outgoing light of the LED light source.
The LED light source is a wide spectrum light source, and the energy loss caused by spectrum overlapping can be reduced by the light combining mode provided by the embodiment shown in fig. 5, so that the energy utilization rate of the light source is improved, and the purposes of improving the light efficiency and the output luminous flux of the whole machine are achieved.
The illumination module shown in fig. 6 includes a light combining assembly 10, a first light source assembly 20, and a second light source assembly 30. Here, the light combining component 10 is the same as the above embodiment, and the description is omitted here, and it is to be noted that the right angle mirror 107 in fig. 6 is formed by the fourth plane mirror 105 and the fifth plane mirror 106 in the above embodiment.
For example, in the embodiment shown in fig. 6, at least one of the light sources having the same or similar color is included in the first light source assembly 20 and the second light source assembly 30, and the same color light source type 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, the second light source assembly includes a green LED light source, and for 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.
In the embodiment shown in fig. 6, the first light source assembly 20 is a laser light source assembly, 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 form an integrated light source, and the laser light emitted from the integrated light source is incident on the polarization splitting plane through the first incident plane after passing through the light homogenizing sheet. The R-LD is P polarized light (the P polarized state is dominant), the G-LD and the B-LD are S polarized light (the S polarized state is dominant), most of red laser emitted by the R-LD is transmitted through the polarized light splitting surface and then emitted from the first light emitting surface, and the other part of red laser is reflected through the polarized light splitting surface and then emitted from the second light emitting surface, and most of green laser emitted by the G-LD and blue laser emitted by the B-LD are reflected through the polarized light splitting surface and then emitted from the second light emitting surface, and the other part of red laser is transmitted through the polarized light splitting surface and then emitted from the first light emitting surface.
The second light source assembly 30 is an LED light source assembly including a red LED light source (R-LED), a green LED light source, and a blue LED light source. The LED light source of each color emits light which is split into P polarized light and S polarized light after being split by the PBS, wherein the P polarized light is transmitted by the polarized light splitting surface and emitted from the second light emitting surface, and the S polarized light is reflected by the polarized light splitting surface and emitted from the first light emitting surface. As shown in fig. 6, the three-color LED light sources in the second light source assembly 30 are sub-light sources.
As shown in fig. 6, the first light source assembly further includes a light homogenizing sheet disposed in the light emitting direction of the light source, for homogenizing the laser to weaken the coherence of the laser, so as to achieve the purpose of inhibiting laser speckle.
The second light source component also comprises a dichroic mirror and a lens group, wherein the dichroic mirror is used for combining light of the three discrete LED light sources, and the lens group is used for converging or collimating light rays and the like.
By the light combining method provided by the embodiment shown in fig. 6, the same-color light source is combined, so that energy loss caused by spectrum overlapping or hole opening can be reduced, the energy utilization rate of the light source is improved, and the purposes of improving the light efficiency and the output luminous flux of the whole light source are achieved.
According to the requirement, a collimation component, a light homogenizing component or a relay component and the like can be arranged on the light emitting side of the combined light beam in the illumination module so as to further process the combined light beam.
The embodiment of the application also provides optical equipment, and the optical equipment is shown in fig. 7. Fig. 7 shows a schematic diagram of an optical device in which an embodiment of the application may be implemented. The optical device shown in fig. 7 is an exemplary projection device, and includes an illumination module 701, a light modulation module 702, and an imaging module 703 according to 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 liquid crystal on silicon or liquid crystal display), and then amplified by the imaging module 703 to be projected to form a projection image.
The projection device in the embodiment of the application may be a projector or a laser television, or may be a PGU (Picture Generation Unit, image generation unit) in a HUD (Heads Up Display). The embodiment of the present application is not particularly limited.
Various embodiments of the application are described herein, but for brevity, description of each embodiment is not exhaustive and features or parts of the same or similar between each embodiment may be omitted. Herein, "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that it is applicable to at least one embodiment or example, but not all embodiments, according to the present application. The above terms are not necessarily meant to refer to the same embodiment or example. Those skilled in the art may combine and combine the features of the different embodiments or examples described in this specification and of the different embodiments or examples without contradiction.
The exemplary systems and methods of the present application have been particularly shown and described with reference to the foregoing embodiments, which are merely examples of the best modes for carrying out the 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 in practicing the systems and/or methods without departing from the spirit and scope of the application as defined in the following claims.
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| CN202421155607.2U CN222299938U (en) | 2024-05-24 | 2024-05-24 | Light combination assembly, lighting module and optical equipment |
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| CN202421155607.2U CN222299938U (en) | 2024-05-24 | 2024-05-24 | Light combination assembly, lighting module and optical equipment |
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