CN219245925U - Double-display double-mirror projector - Google Patents
Double-display double-mirror projector Download PDFInfo
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- CN219245925U CN219245925U CN202222539541.4U CN202222539541U CN219245925U CN 219245925 U CN219245925 U CN 219245925U CN 202222539541 U CN202222539541 U CN 202222539541U CN 219245925 U CN219245925 U CN 219245925U
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Abstract
The embodiment provides a dual-display dual-mirror projector, which belongs to the technical field of projectors. The dual-display dual-mirror projector comprises a beam splitting component, a reflecting component, a first imaging light valve, a second imaging light valve, a first imaging lens and a second imaging lens. The dual display dual mirror projector has a first optical path and a second optical path. The beam splitting piece, the first imaging light valve and the first imaging lens are sequentially arranged on the first light path. The light splitting piece, the reflecting piece, the second imaging light valve and the second imaging lens are sequentially arranged on the second light path. The first imaging lens and the second imaging lens are arranged in parallel. The beam splitter may split the incident light into a P-polarized light and an S-polarized light, and one of the split P-polarized light and S-polarized light propagates along the first optical path and the other propagates along the second optical path. Which can improve the display brightness of the projector.
Description
Technical Field
The utility model relates to the technical field of projectors, in particular to a double-display double-mirror projector.
Background
A projector, also known as a projector, is a device that can project images or video onto a curtain. As illumination of the projector, no matter using a light source such as an LED or a metal halogen lamp, the emitted light includes S polarized light formed by transverse waves and P polarized light formed by longitudinal waves, and the S polarized light and the P polarized light respectively account for 50% of the total light intensity, whereas the imaging light valve can only work under polarized light in one vibration direction, and polarized light in the other vibration direction is blocked, so that the projected light efficiency is low, and the brightness of the projector is not high.
Therefore, how to improve the display brightness of the projector is a problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to provide a dual-display dual-mirror projector, which can improve the display brightness of the projector.
Embodiments of the present utility model are implemented as follows:
in a first aspect, the present utility model provides a dual-display dual-mirror projector, including a beam splitter, a reflector, a first imaging light valve, a second imaging light valve, a first imaging lens, and a second imaging lens;
the dual-display dual-mirror projector is provided with a first light path and a second light path;
the light splitting piece, the first imaging light valve and the first imaging lens are sequentially arranged on the first light path;
the light splitting piece, the light reflecting piece, the second imaging light valve and the second imaging lens are sequentially arranged on the second light path;
the first imaging lens and the second imaging lens are arranged in parallel;
the beam splitter may split an incident light into a P-polarized light and an S-polarized light, and one of the split P-polarized light and S-polarized light propagates along the first optical path and the other propagates along the second optical path.
In an alternative embodiment, the first imaging light valve and the second imaging light valve are both LCD imaging light valves;
in the first light path, the first imaging light valve is arranged on the reflecting side of the light splitting piece, and the first imaging lens is arranged on the light emitting side of the first imaging light valve;
in the second light path, the light reflecting member is disposed on a transmission side of the light splitting member, the second imaging light valve is disposed on a reflection side of the light reflecting member, and the second imaging lens is disposed on a light emitting side of the second imaging light valve.
In an alternative embodiment, the first imaging light valve comprises a first imaging element, a first entrance polarizer, and a first exit polarizer;
the first incident polaroid is arranged on the light incident side of the first imaging element, the first emergent polaroid is arranged on the light emergent side of the first imaging element, the first incident polaroid can transmit the S polarized light, and the first emergent polaroid can transmit the P polarized light;
in the first light path, the S-polarized light separated by the light splitting piece is reflected to the first incident polaroid by the light splitting piece and enters a first imaging original, the S-polarized light is processed by the first imaging original to form P-polarized image light, and the P-polarized image light is projected to the first imaging lens by the first emergent polaroid;
the second imaging light valve comprises a second imaging element, a second incident polarizer and a second exit polarizer;
the second incident polaroid is arranged on the light incident side of the second imaging original, the second emergent polaroid is arranged on the light emergent side of the second imaging original, the first incident polaroid can transmit the P polarized light, and the second emergent polaroid can transmit the S polarized light;
in the second light path, the P-polarized light separated by the light splitting component is transmitted by the light splitting component and emitted to the second incident polaroid by the light reflecting component, then enters the second imaging original, is processed by the second imaging original to form an S-polarized image light, and is projected to the second imaging lens by the second emergent polaroid.
In an alternative embodiment, the first imaging light valve and the second imaging light valve are both LCOS imaging light valves;
the double-display double-mirror projector also comprises a first polarization beam splitter prism and a second polarization beam splitter prism;
the first polarization splitting prism is arranged in the first light path and is positioned on the transmission side of the light splitting piece, the first imaging light valve is arranged on the P polar light transmission side of the first polarization splitting prism, and the first imaging lens is arranged on the S polar light reflection side of the first polarization splitting prism;
the second polarization splitting prism is arranged in the second light path and is positioned on the reflecting side of the reflecting piece, the second imaging light valve is arranged on the S-polarized light reflecting side of the second polarization splitting prism, and the second imaging lens is arranged on the P-polarized light transmitting side of the second polarization splitting prism.
In an alternative embodiment, a dual display dual mirror projector includes a first mirror and a second mirror;
the first reflecting mirror and the second reflecting mirror are both arranged on the first light path, the first reflecting mirror is arranged on the reflecting side of the light splitting piece, the second reflecting mirror is arranged on the reflecting side of the first reflecting mirror, the first polarization splitting prism is arranged on the reflecting side of the second reflecting mirror, the first imaging light valve is arranged on the first side of the first polarization splitting prism, and the first imaging lens is arranged on the second side of the first polarization splitting prism;
the light reflecting piece is arranged on the transmission side of the light splitting piece, the second polarization splitting prism is arranged on the second light path, the second polarization splitting prism is arranged on the reflection side of the light reflecting piece, the second imaging light valve is arranged on the third side of the second polarization splitting prism, and the second imaging lens is arranged on the fourth side of the second polarization splitting prism;
the first side and the second side are two opposite sides of the first polarization splitting prism, and the third side and the fourth side are two opposite sides of the second polarization splitting prism.
In an alternative embodiment, the dual display dual mirror projector further comprises a 1/2 wave plate, wherein the 1/2 wave plate can change the polarization direction of polarized light to realize the conversion between the S polarized light and the P polarized light;
the 1/2 wave plate is arranged on the first light path and is positioned between the light splitting piece and the first imaging light valve; or alternatively, the first and second heat exchangers may be,
the 1/2 wave plate is arranged on the second light path and is positioned between the light splitting piece and the second imaging light valve.
In an alternative embodiment, the centers of the beam splitter, the light reflector, the first imaging light valve, the second imaging light valve, the first imaging lens and the second imaging lens are located on the same plane.
In an alternative embodiment, the dual display dual mirror projector further comprises a third mirror and a fourth mirror;
the optical axis of the first imaging lens is perpendicular to the optical axis of the first imaging light valve, the third reflecting mirror is arranged in the first optical path and is positioned between the first imaging light valve and the first imaging lens, and image light rays formed by the first imaging light valve are reflected to the first imaging lens by the third reflecting mirror;
the optical axis of the second imaging lens is perpendicular to the optical axis of the second imaging light valve, the fourth reflecting mirror is arranged in the second optical path and is positioned between the second imaging light valve and the second imaging lens, and image light rays formed by the second imaging light valve are reflected to the second imaging lens by the fourth reflecting mirror.
In an alternative embodiment, the parameters of the first imaging lens and the second imaging lens are the same.
In an alternative embodiment, the centers of the beam splitter, the light reflector, the first imaging light valve, the second imaging light valve, the first polarization beam splitter prism, the second polarization beam splitter prism, the first reflecting mirror and the second reflecting mirror are located on the same plane and are perpendicular to the planes of the first imaging lens and the second imaging lens.
The projector with double display and double mirrors provided by the embodiment of the utility model has the beneficial effects that:
the light beam of the projector light source can be divided into P polarized light and S polarized light by the light splitting piece, the P polarized light and the S polarized light can be formed into a first light path and a second light path, the first imaging light valve and the first imaging lens are arranged on the first light path, the second imaging light valve and the second imaging lens are arranged on the second light path, so that the P polarized light and the S polarized light can be utilized, and corresponding pixels are overlapped to form a complete image to realize convergence by adjusting the axiality and the focal length of the first imaging lens and the second imaging lens, so that the display brightness of the projector can be improved, the heating value of the first imaging light valve and the second imaging light valve can be reduced, and the continuous running time of the projector can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual display dual mirror projector according to an embodiment of the present utility model in a horizontal configuration of an LCD imaging light valve;
FIG. 2 is a schematic diagram of a dual display dual mirror projector according to an embodiment of the present utility model in a vertical flat configuration of an LCD imaging light valve;
FIG. 3 is a schematic diagram of an L-shaped configuration of a dual-display dual-mirror projector according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of an L-shaped configuration of a dual-display dual-mirror projector according to an embodiment of the present utility model, which is an LCOS imaging light valve;
fig. 5 is a schematic structural diagram of a dual-display dual-mirror projector according to an embodiment of the present utility model in a horizontal configuration of an LCOS imaging light valve.
Icon 100-double display double mirror projector; 110-a first optical path; 120-a second optical path; 1-a light splitting piece; 2-a light reflecting member; 3-a first imaging light valve; 4-a second imaging light valve; 5-a first imaging lens; 6-a second imaging lens; 7-a first polarization splitting prism; 71-a first side; 72-a second side; 8-a second polarization splitting prism; 81-third side; 82-fourth side; a 9-1/2 wave plate; 10-a first mirror; 11-a second mirror; 12-a third mirror; 13-a fourth mirror; 14-field lens.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The present embodiment provides a dual display dual mirror projector 100 capable of improving the brightness of the projector.
Referring to fig. 1-5, in the present embodiment, a dual-display dual-mirror projector 100 includes a beam splitter 1, a reflecting member 2, a first imaging light valve 3, a second imaging light valve 4, a first imaging lens 5 and a second imaging lens 6. The dual display dual mirror projection has a first optical path 110 and a second optical path 120. The beam splitter 1, the first imaging light valve 3 and the first imaging lens 5 are sequentially disposed on the first optical path 110. The light splitting element 1, the light reflecting element 2, the second imaging light valve 4 and the second imaging lens 6 are sequentially disposed on the second optical path 120. The first imaging lens 5 and the second imaging lens 6 are disposed in parallel. The light splitting member 1 may split the incident light into a P-polarized light and an S-polarized light, and one of the split P-polarized light and S-polarized light propagates along the first optical path 110 and the other propagates along the second optical path 120.
The light beam of the projector light source can be divided into P-polarized light and S-polarized light by the light-dividing piece 1, the P-polarized light and the S-polarized light are formed into a first light path 110 and a second light path 120, the first imaging light valve 3 and the first imaging lens 5 are arranged on the first light path 110, the second imaging light valve 4 and the second imaging lens 6 are arranged on the second light path 120, so that the P-polarized light and the S-polarized light can be utilized, and corresponding pixels are overlapped to form a complete image by adjusting the off-axis degree and the focal length of the first imaging lens 5 and the second imaging lens 6, so that the display brightness of the projector can be improved, the heating value of the first imaging light valve 3 and the second imaging light valve 4 can be reduced, and the continuous running time of the projector can be improved.
In this embodiment, the beam splitter is a beam splitter film, and in other embodiments of the present application, the beam splitter 1 may be a PBS beam splitter prism.
In the present embodiment, the parameters of the first imaging lens 5 and the second imaging lens 6 are the same.
Referring to fig. 1-3, in the present embodiment, the first imaging light valve 3 and the second imaging light valve 4 are LCD imaging light valves. The LCD imaging light valve is one of light transmissive liquid crystal light valves, and is also one of light valves commonly used in projectors, and it implements phase retardation of light by voltage controlling refractive index of liquid crystal molecules. And filling a liquid crystal material between the two pieces of flat glass, and plating a transparent electrode and an alignment layer on the glass pieces. The space between the glass sheets is controlled by fine glass fibers at the edges. This produces a liquid crystal phase retarder. When the voltage on two sides of the liquid crystal is zero and the liquid crystal molecule arrangement direction is parallel to the glass plate direction, the difference between the o light refractive index and the e light refractive index is the largest. As the voltage across the liquid crystal layer increases, the liquid crystal molecules start to rotate, and the difference between the o-refractive index and the e-refractive index gradually decreases until the two are almost equivalent.
The S laser light reflected by the beam splitter 1 in the first optical path 110 and the P polarized light transmitted by the beam splitter 1 in the second optical path 120 will be described below.
Referring to fig. 1 to 5, in the first optical path 110, the first imaging light valve 3 is disposed on a reflection side of the light splitting element 1, the first imaging lens 5 is disposed on a light emitting side of the first imaging light valve 3, S-polarized light split by the light splitting element 1 can be reflected to a light incident side of the first imaging light valve 3 by the light splitting element 1, and image light (P-pole) formed by rotation of the first imaging light valve 3 and the like is projected to the first imaging lens 5. In the second optical path 120, the light reflecting member 2 is disposed on the transmission side of the light splitting member 1, the second imaging light valve 4 is disposed on the reflection side of the light reflecting member 2, the second imaging lens 6 is disposed on the light emitting side of the second imaging light valve 4, the S-polarized light separated by the light splitting member 1 is continuously reflected by the light splitting member 1 and the light reflecting member 2 and then projected to the light incident side of the second imaging light valve 4, and the image light (P-pole) is formed after being processed by the second imaging light valve 4 and then projected to the second imaging lens 6.
It should be noted that, in general, the light splitting element 1 and the light reflecting element 2 are disposed at an angle of 45 degrees, and the incident angle and the reflection angle are equal and the sum is 90 degrees, so that all optical elements can be arranged in a rectangular shape, and the space arrangement can be more compact.
Referring to fig. 1 to 5, in the present embodiment, the first imaging light valve 3 includes a first imaging element, a first incident polarizer and a first exit polarizer;
the first incident polaroid is arranged on the light incident side of the first imaging original, the first emergent polaroid is arranged on the light emergent side of the first imaging original, the first incident polaroid can transmit S polarized light, and the first emergent polaroid can transmit P polarized light;
in the first optical path 110, the S-polarized light separated by the beam splitter 1 is reflected by the beam splitter 1 to the first incident polarizer, enters the first imaging element, is processed by the first imaging element to form P-polarized image light, and is projected to the first imaging lens 5 by the first emergent polarizer;
the second imaging light valve 4 comprises a second imaging element, a second entrance polarizer and a second exit polarizer;
the second incident polaroid is arranged on the light incident side of the second imaging original, the second emergent polaroid is arranged on the light emergent side of the second imaging original, the first incident polaroid can transmit P polarized light, and the second emergent polaroid can transmit S polarized light;
in the second optical path 120, the P-polarized light separated by the light-splitting element 1 is transmitted through the light-splitting element 1 and emitted to the second incident polarizer by the light-reflecting element 2, then enters the second imaging element, is processed by the second imaging element to form an S-polarized image light, and is projected to the second imaging lens 6 by the second emergent polarizer.
It should be noted that the first imaging element and the second imaging element are LCD imaging light valve liquid crystal portions, and the first incident polarizer and the second incident polarizer are used for further filtering light rays emitted to the first imaging element and the second imaging element, respectively, so as to form a single-polarity light beam.
It is understood that the first imaging element, the first entrance polarizer and the first exit polarizer are integrally formed. The first incident polaroid and the first emergent polaroid are pressed on the incident side and the emergent side of the first imaging element, so that the filtering of the incident side and the emergent side can be realized. In this embodiment, the first incident polarizer may pass the S-pole, the first exit polarizer may pass the P-pole, the second incident polarizer may pass the P-pole, and the second exit polarizer may pass the S-pole.
Referring to fig. 2, in other embodiments of the present application, the dual-display dual-mirror projector 100 further includes a 1/2 wave plate 9, where the 1/2 wave plate 9 is disposed on the first optical path 110 and between the beam splitter 1 and the first imaging light valve 3; or, the 1/2 wave plate 9 is disposed on the second optical path 120 and between the beam splitter 1 and the second imaging light valve 4.
The polarization direction of the polarized light can be changed by using the 1/2 wave plate 9 to realize the conversion between the S-polarized light and the P-polarized light, so that the first imaging light valve 3 and the second imaging light valve 4 can adopt the same imaging light valve.
Referring to fig. 4 and 5, in some embodiments, the first imaging light valve 3 and the second imaging light valve 4 are LCOS imaging light valves. The LCOS imaging light valve is a reflective liquid crystal light valve, which adopts a CMOS integrated circuit chip coated with liquid crystal silicon as a substrate of a reflective LCD, uses advanced technology to grind and flat, then plates aluminum as a reflecting mirror to form a CMOS substrate, then the CMOS substrate is attached to a glass substrate containing transparent electrodes, and then liquid crystal is injected for encapsulation.
Referring to fig. 4, in the present embodiment, the dual-display dual-mirror projector 100 further includes a first polarization splitting prism 7 and a second polarization splitting prism 8. The first polarization beam splitter prism 7 is disposed in the first optical path 110 and is located on the transmission side of the beam splitter 1, the first imaging light valve 3 is disposed on the P-polarized light transmission side of the first polarization beam splitter prism 7, and the first imaging lens 5 is disposed on the S-polarized light reflection side of the first polarization beam splitter prism 7. The second polarization beam splitter prism 8 is disposed in the second optical path 120 and is located at the reflecting side of the reflecting member 2, the second imaging light valve 4 is disposed at the S-polarized light reflecting side of the second polarization beam splitter prism 8, and the second imaging lens 6 is disposed at the P-polarized light projection side of the second polarization beam splitter prism 8.
The first polarization splitting prism 7 and the second polarization splitting prism 8 are PBS polarization splitting prisms, which allow the P polarized light to pass through completely, while the S polarized light is reflected at an angle of 45 degrees, and the outgoing direction forms an angle of 90 degrees with the P light. The polarization beam splitter prism is formed by gluing a pair of high-precision right-angle prisms, wherein the hypotenuse of one prism is plated with a polarization beam splitter dielectric film, and the polarization beam splitter prism is often matched with an LCOS imaging light valve.
Referring to fig. 5, the layout of the dual display dual mirror projector 100 can be changed by adding the first mirror 10 and the second mirror 11 on the basis of the embodiment of fig. 4.
Specifically, the first mirror 10 and the second mirror 11 are both disposed on the first optical path 110, the first mirror 10 is disposed on the reflection side of the beam splitter 1, the second mirror 11 is disposed on the reflection side of the first mirror 10, the first polarization beam splitter prism 7 is disposed on the reflection side of the second mirror 11, the first imaging light valve 3 is disposed on the first side 71 of the first polarization beam splitter prism 7, and the first imaging lens 5 is disposed on the second side 72 of the first polarization beam splitter prism 7. The reflecting member 2 is disposed on the transmission side of the light splitting member 1, the second polarization splitting prism 8 is disposed on the second optical path 120, and the second polarization splitting prism 8 is disposed on the reflection side of the reflecting member 2, the second imaging light valve 4 is disposed on the third side 81 of the second polarization splitting prism 8, and the second imaging lens 6 is disposed on the fourth side 82 of the second polarization splitting prism 8.
Further, the first side 71 and the second side 72 are opposite sides of the first polarization splitting prism 7, so that the P-pole image light can be transmitted from the first side 71 to the second side 72. The third side 81 and the fourth side 82 are opposite sides of the second polarization beam splitter 8, so that the S-pole image light incident on the third side 81 can be reflected to be emitted from the fourth side 82. In the first optical path 110, the S-polarized light split by the beam splitter 1 is reflected by the beam splitter 1 to the first mirror 10, then reflected by the first mirror 10 and the second mirror 11 to the first polarization beam splitter prism 7, then reflected by the first polarization beam splitter prism 7 to enter the first imaging light valve 3, and the S-polarized light entering the first imaging light valve 3 is processed by the first imaging light valve 3 to form P-polarized image light, and then transmitted by the first polarization beam splitter prism 7 to the first imaging lens 5. In the second optical path 120, the P-polarized light separated by the light splitting element 1 is transmitted by the light splitting element 1 and reflected by the light reflecting element 2, enters the second polarization splitting prism 8, is transmitted by the second polarization splitting prism 8, enters the second imaging light valve 4, and the P-polarized light entering the second imaging light valve 4 is processed by the second imaging light valve 4 to form an S-polarized image light, and is emitted and reflected by the second polarization splitting prism 8 to the second imaging lens 6.
In some embodiments, the centers of the beam splitter 1, the light reflector 2, the first imaging light valve 3, the second imaging light valve 4, the first imaging lens 5, and the second imaging lens 6 are located on the same plane, for example, a horizontal plane or a vertical plane.
Of course, in other embodiments of the present application, the centers of the beam splitter 1, the beam reflector 2, the first imaging light valve 3, the second imaging light valve 4, the first polarization beam splitter prism 7, the second polarization beam splitter prism 8, the first reflecting mirror 10, and the second reflecting mirror 11 are located on the same plane and are perpendicular to the planes of the first imaging lens 5 and the second imaging lens 6. For example, by providing the third mirror 12 and the fourth mirror 13 or by adjusting the positions of the first imaging lens 5 and the second imaging lens 6.
When implemented by the third mirror 12 and the fourth mirror 13, the optical axis of the first imaging lens 5 is perpendicular to the optical axis of the first imaging light valve 3, and the third mirror 12 is disposed in the first optical path 110 and is located between the first imaging light valve 3 and the first imaging lens 5, and the image light formed by the first imaging light valve 3 is reflected by the third mirror 12 to the first imaging lens 5. The optical axis of the second imaging lens 6 is perpendicular to the optical axis of the second imaging light valve 4, and the fourth reflecting mirror 13 is disposed in the second optical path 120 and is located between the second imaging light valve 4 and the second imaging lens 6, and the image light formed by the second imaging light valve 4 is reflected to the second imaging lens 6 by the fourth reflecting mirror 13. Thus, an L-shaped arrangement can be achieved.
In the present embodiment, a relay field lens 14, such as a fresnel lens, may be further provided between the optical elements, and the arrangement position and the number thereof may be determined according to the size of the optical path structure and the divergence angle of the actual illumination light.
It should be further noted that the spatial arrangement of all the optical elements may be set according to the configuration of the projector, such as the horizontal arrangement, the vertical arrangement, the L-shaped arrangement, and the like mentioned in the above embodiments. For example, in a vertically arranged configuration, the first imaging lens 5, the second imaging lens 6, the first imaging light valve 3 and the short side of the second imaging light valve 4 are all in the height axis direction, and the center distance between the first imaging light valve 3 and the second imaging light valve 4 and between the first imaging lens 5 and the second imaging lens 6 is shorter than that of a horizontal convergence configuration, so that the aperture of the lenses can be reduced, the degree of off-axis is correspondingly reduced, and the method is beneficial to cost reduction, distortion degree reduction, overall volume miniaturization and the like.
The projector with double display and double mirrors provided by the embodiment of the utility model has the beneficial effects that:
the light beam of the projector light source can be divided into P polarized light and S polarized light by the light splitting piece 1, the P polarized light and the S polarized light can be formed into the first light path 110 and the second light path 120, the first imaging light valve 3 and the first imaging lens 5 are arranged on the first light path 110, the second imaging light valve 4 and the second imaging lens 6 are arranged on the second light path 120, so that the P polarized light and the S polarized light can be utilized, the display brightness of the projector can be improved, the heating value of the first imaging light valve 3 and the second imaging light valve 4 can be reduced, and the continuous running time of the projector can be prolonged.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The double-display double-mirror projector is characterized by comprising a light splitting piece (1), a light reflecting piece (2), a first imaging light valve (3), a second imaging light valve (4), a first imaging lens (5) and a second imaging lens (6);
the dual display dual mirror projector has a first optical path (110) and a second optical path (120);
the light splitting piece (1), the first imaging light valve (3) and the first imaging lens (5) are sequentially arranged on the first light path (110);
the light splitting piece (1), the reflecting piece (2), the second imaging light valve (4) and the second imaging lens (6) are sequentially arranged on the second light path (120);
the first imaging lens (5) and the second imaging lens (6) are arranged in parallel;
the beam splitter (1) may split an incident light into a P-polarized light and an S-polarized light, and one of the split P-polarized light and S-polarized light propagates along the first optical path (110) and the other propagates along the second optical path (120).
2. The dual display dual mirror projector of claim 1, wherein the first imaging light valve (3) and the second imaging light valve (4) are both LCD imaging light valves;
in the first optical path (110), the first imaging light valve (3) is arranged on the reflecting side of the beam splitter (1), and the first imaging lens (5) is arranged on the light emitting side of the first imaging light valve (3);
in the second optical path (120), the reflecting member (2) is disposed on a transmission side of the light splitting member (1), the second imaging light valve (4) is disposed on a reflection side of the reflecting member (2), and the second imaging lens (6) is disposed on a light emitting side of the second imaging light valve (4).
3. A dual display dual mirror projector as claimed in claim 1, characterized in that the first imaging light valve (3) comprises a first imaging element, a first entrance polarizer and a first exit polarizer;
the first incident polaroid is arranged on the light incident side of the first imaging element, the first emergent polaroid is arranged on the light emergent side of the first imaging element, the first incident polaroid can transmit the S polarized light, and the first emergent polaroid can transmit the P polarized light;
in the first light path (110), the S-polarized light separated by the light splitting component (1) is reflected to the first incident polaroid by the light splitting component (1) and then enters a first imaging original, the image light is processed by the first imaging original to form P-polarized image light, and the P-polarized image light is projected to the first imaging lens (5) by the first emergent polaroid;
the second imaging light valve (4) comprises a second imaging element, a second entrance polarizer and a second exit polarizer;
the second incident polaroid is arranged on the light incident side of the second imaging original, the second emergent polaroid is arranged on the light emergent side of the second imaging original, the first incident polaroid can transmit the P polarized light, and the second emergent polaroid can transmit the S polarized light;
in the second light path (120), the P-polarized light separated by the light splitting component (1) is transmitted by the light splitting component (1) and emitted to the second incident polarizer by the light reflecting component (2) and enters the second imaging original, and the image light is processed by the second imaging original to form an S-polarized image light, and then is projected to the second imaging lens (6) by the second emergent polarizer.
4. The dual display dual mirror projector of claim 1, wherein the first imaging light valve (3) and the second imaging light valve (4) are both LCOS imaging light valves;
the double-display double-mirror projector also comprises a first polarization beam splitter prism (7) and a second polarization beam splitter prism (8);
the first polarization splitting prism (7) is arranged in the first light path (110) and is positioned on the transmission side of the light splitting piece (1), the first imaging light valve (3) is arranged on the P-polarized light transmission side of the first polarization splitting prism (7), and the first imaging lens (5) is arranged on the S-polarized light reflection side of the first polarization splitting prism (7);
the second polarization splitting prism (8) is arranged in the second light path (120) and is located on the reflecting side of the reflecting piece (2), the second imaging light valve (4) is arranged on the S-polarized light reflecting side of the second polarization splitting prism (8), and the second imaging lens (6) is arranged on the P-polarized light transmitting side of the second polarization splitting prism (8).
5. The dual display dual mirror projector of claim 4, further comprising a first mirror (10) and a second mirror (11);
the first reflecting mirror (10) and the second reflecting mirror (11) are both arranged on the first light path (110), the first reflecting mirror (10) is arranged on the reflecting side of the light splitting piece (1), the second reflecting mirror (11) is arranged on the reflecting side of the first reflecting mirror (10), the first polarization splitting prism (7) is arranged on the reflecting side of the second reflecting mirror (11), the first imaging light valve (3) is arranged on the first side (71) of the first polarization splitting prism (7), and the first imaging lens (5) is arranged on the second side (72) of the first polarization splitting prism (7);
the light reflecting piece (2) is arranged on the transmission side of the light splitting piece (1), the second polarization splitting prism (8) is arranged on the second light path (120), the second polarization splitting prism (8) is arranged on the reflection side of the light reflecting piece (2), the second imaging light valve (4) is arranged on the third side (81) of the second polarization splitting prism (8), and the second imaging lens (6) is arranged on the fourth side (82) of the second polarization splitting prism (8);
the first side (71) and the second side (72) are two opposite sides of the first polarization splitting prism (7), and the third side (81) and the fourth side (82) are two opposite sides of the second polarization splitting prism (8).
6. The dual display dual mirror projector of claim 2 or 4, further comprising a 1/2 wave plate (9), the 1/2 wave plate (9) being capable of changing the polarization direction of polarized light to effect a transition between the S-polarized light and the P-polarized light;
the 1/2 wave plate (9) is arranged on the first light path (110) and is positioned between the light splitting piece (1) and the first imaging light valve (3); or alternatively, the first and second heat exchangers may be,
the 1/2 wave plate (9) is arranged on the second light path (120) and is positioned between the light splitting piece (1) and the second imaging light valve (4).
7. Dual display dual mirror projector according to any of claims 1-5, characterized in that the centers of the light splitting element (1), the light reflecting element (2), the first imaging light valve (3), the second imaging light valve (4), the first imaging lens (5) and the second imaging lens (6) are located in the same plane.
8. A dual display dual mirror projector according to claim 3 or 4, characterized in that it further comprises a third mirror (12) and a fourth mirror (13);
the optical axis of the first imaging lens (5) is perpendicular to the optical axis of the first imaging light valve (3), the third reflecting mirror (12) is arranged in the first optical path (110) and is positioned between the first imaging light valve (3) and the first imaging lens (5), and image light formed by the first imaging light valve (3) is reflected to the first imaging lens (5) by the third reflecting mirror (12);
the optical axis of the second imaging lens (6) is perpendicular to the optical axis of the second imaging light valve (4), the fourth reflecting mirror (13) is arranged in the second optical path (120) and is located between the second imaging light valve (4) and the second imaging lens (6), and image light formed by the second imaging light valve (4) is reflected to the second imaging lens (6) by the fourth reflecting mirror (13).
9. Dual display dual mirror projector according to any of claims 1-5, characterized in that the parameters of the first imaging lens (5) and the second imaging lens (6) are identical.
10. The dual display dual mirror projector according to claim 4 or 5, wherein the centers of the beam splitter (1), the light reflector (2), the first imaging light valve (3), the second imaging light valve (4), the first polarization splitting prism (7), the second polarization splitting prism (8), the first reflecting mirror (10) and the second reflecting mirror (11) are located on the same plane and are perpendicular to the planes on which the first imaging lens (5) and the second imaging lens (6) are located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222539541.4U CN219245925U (en) | 2022-09-23 | 2022-09-23 | Double-display double-mirror projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222539541.4U CN219245925U (en) | 2022-09-23 | 2022-09-23 | Double-display double-mirror projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219245925U true CN219245925U (en) | 2023-06-23 |
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ID=86841384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222539541.4U Active CN219245925U (en) | 2022-09-23 | 2022-09-23 | Double-display double-mirror projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219245925U (en) |
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2022
- 2022-09-23 CN CN202222539541.4U patent/CN219245925U/en active Active
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