CN112987328A - 3D projection assembly, 3D projector and display system - Google Patents
3D projection assembly, 3D projector and display system Download PDFInfo
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- CN112987328A CN112987328A CN202110199402.9A CN202110199402A CN112987328A CN 112987328 A CN112987328 A CN 112987328A CN 202110199402 A CN202110199402 A CN 202110199402A CN 112987328 A CN112987328 A CN 112987328A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
Abstract
The invention provides a 3D projection assembly, a 3D projector and a display system, wherein the 3D projection assembly comprises: a light source; the first polarization beam splitter prism is used for separating light rays emitted by the light source into two linearly polarized light beams which are vertical in space; the first display panel and the second display panel respectively receive one of the two linearly polarized light beams and deflect the polarization direction of the linearly polarized light beam; the first reflecting mirror and the second reflecting mirror are used for reflecting emergent rays of the first display panel and the second display panel to the second polarization beam splitter prism; and emergent light of the first display panel and the second display panel is superposed with the polarization splitting dielectric film of the second polarization splitting prism. Through the optical characteristics between two display panels, two PBS prisms and two reflectors, the 3D projection of a single light source can be realized, two groups of pictures are synchronously displayed, the 3D projection effect is enhanced, and the problems that the 3D projection equipment is complex in structure and high in manufacturing cost are solved.
Description
Technical Field
The invention relates to the technical field of 3D projection, in particular to a 3D projection assembly, a 3D projector and a display system.
Background
The principle of 3D projection technology (3D projection) for realizing 3D display is to send different images to the left and right eyes of a person, respectively, and after synthesis by the brain, enable a viewer to feel the stereoscopic impression of a picture.
At present, 3D projectors mainly have a shutter type, a polarizing type, and a chromatic aberration type:
(1) a shutter type 3D projector is high-end video glasses designed by using a shutter type 3D display technology, is complex in structure, realizes a 3D effect mainly by improving a quick refresh rate (usually reaching 120Hz) of a picture, and has the defects of great discount of brightness, easy fatigue of eyes, complex structure and high price of the glasses and frequent charging;
(2) the color difference type 3D projector adopts two groups of pictures printed with two different colors, and audiences can see the stereoscopic effect through matching corresponding color difference type 3D glasses. Taking red and blue glasses as an example, only red images can be seen under red lenses, only blue images can be seen under blue lenses, different images seen by two eyes are overlapped in brains to present a 3D stereoscopic effect, the defect is that the phenomenon of ghost images which cannot be avoided occurs, the technology is relatively lagged behind, and the technology is basically replaced by shutter type and polarized light type 3D;
(3) the polarization type 3D projector generally superimposes two projectors, a polarizer and corresponding glasses are arranged in front of a lens, and sometimes software is used to perform geometric correction of the two projectors, which is expensive and has high precision requirement.
DLP 3D projecting apparatus is through containing the digital micro mirror chip DMD of millions of reflective light, and two images are generated accurately on the screen simultaneously, and the rethread special 3D glasses fuses it and acts on left and right eyes respectively, and its digital micro mirror chip DMD cost is higher and glasses cost is expensive.
Disclosure of Invention
In order to solve the problems of complex structure and high manufacturing cost of 3D projection equipment, the invention provides a 3D projection assembly, a 3D projector and a display system, which are used for realizing synchronous display of two groups of pictures and enhancing the 3D projection effect.
In a first aspect, an embodiment of the present invention provides a 3D projection assembly, including:
a light source;
the first polarization beam splitter prism is arranged in front of the light source and is used for separating the light emitted by the light source into two beams of linearly polarized light which are vertical in space;
the first display panel and the second display panel are respectively attached to the two light-emitting surfaces of the first polarization splitting prism, and respectively receive one linearly polarized light of the two linearly polarized light beams and deflect the polarization direction of the linearly polarized light;
the first reflective mirror and the second reflective mirror are used for reflecting emergent rays of the first display panel and the second display panel to the second polarization beam splitter prism; and
the second polarization beam splitter prism and the polarization beam splitting dielectric film of the first polarization beam splitter prism are positioned on the same plane, and emergent light of the first display panel and the second display panel is superposed on the polarization beam splitting dielectric film of the second polarization beam splitter prism.
In some embodiments, the 3D projection assembly further comprises:
the first lens is positioned between the light emitting side of the light source and the first polarization splitting prism and used for converting the light rays emitted by the light source into approximately parallel light;
and the second lens is positioned on the light outlet side of the second polarization beam splitter prism, and the light inlet surface of the second lens is parallel to the light outlet surface of the second polarization beam splitter prism and is used for converging the emergent light of the second polarization beam splitter prism.
In some embodiments, the first and second lenses are fresnel lenses.
In some embodiments, the 3D projection assembly further comprises:
and the projection lens is used for projecting the emergent light of the second lens.
In some embodiments, the first reflective mirror is at an angle of 45 ° with respect to the first display panel, and the second reflective mirror is at an angle of 45 ° with respect to the second display panel. And the two light incident surfaces of the second polarization splitting prism are respectively superposed with the two light emergent surfaces of the first polarization splitting prism.
In some embodiments, the 3D projection assembly further comprises:
and the lambda/4 glass slide is positioned in front of the second polarization splitting prism and used for converting two spatially vertical linearly polarized light beams emitted by the second polarization splitting prism into circularly polarized light with opposite rotation directions.
In some embodiments, the polarization angle of the incident light of the first display panel is perpendicular to the transmission axis of the upper polarizer of the first display panel, and the polarization angle of the incident light of the second display panel is perpendicular to the transmission axis of the upper polarizer of the second display panel.
In some embodiments, the first display panel and the second display panel are LCD panels having a single polarizer, and the single polarizer is an upper polarizer.
In a second aspect, an embodiment of the present invention provides a 3D projector, including the 3D projection module according to the first aspect.
In a third aspect, an embodiment of the present invention provides a display system, including:
the 3D projection assembly of the first aspect or the 3D projector of the second aspect;
the projection curtain is used for projecting the emergent light of the second polarization beam splitter prism to form a projection picture; and
and the imaging glasses are used for reflecting the projection picture into human eyes.
In some embodiments, when the 3D projection assembly or the 3D projector comprises a λ/4 slide, the two lenses of the imaging glasses are left-handed polarized light transparent and right-handed polarized light transparent, respectively.
One or more embodiments of the invention have at least the following beneficial effects:
the invention provides a 3D projection assembly, which comprises a light source, a first polarization beam splitter prism arranged in front of the light source, a first display panel and a second display panel which are respectively attached to two light-emitting surfaces of the first polarization beam splitter prism, a first reflecting mirror and a second reflecting mirror, wherein the first polarization beam splitter prism separates light emitted by the light source into two beams of linearly polarized light which are vertical in space, the first display panel and the second display panel respectively deflect the polarization direction of one beam of linearly polarized light, and the first reflecting mirror and the second reflecting mirror reflect emergent light of the first display panel and the second display panel to the second polarization beam splitter prism so that emergent light of the first display panel and the second display panel is superposed on a polarization beam splitting medium film of the second polarization beam splitter prism. Through the optical characteristics between two display panels, two PBS prisms and two reflectors, the 3D projection of a single light source can be realized, two groups of pictures are synchronously displayed, the 3D projection effect is enhanced, and the problems that the 3D projection equipment is complex in structure and high in manufacturing cost are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a 3D projection assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another 3D projection module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the 3D imaging principle provided by the embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a light-emitting principle of a display panel according to an embodiment of the present invention;
wherein: 1-light source, 2-first polarization beam splitter prism, 3-first display panel, 4-first reflector, 5-second polarization beam splitter prism, 6-second lens, 7-projection lens, 8-projection screen, 9-imaging glasses, 10-second reflector, 11-second display panel, 12-first lens, 13-lampshade and 14-lambda/4 glass slide.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention 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 present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 shows a schematic structural diagram of a 3D projection assembly, and as shown in fig. 1, the embodiment provides a 3D projection assembly, including:
a light source 1;
a first polarization beam splitter 2(PBS prism) disposed in front of the light source 1 for splitting the light emitted from the light source 1 into two spatially perpendicular linearly polarized lights;
the first display panel 3 and the second display panel 11 are respectively attached to the two light-emitting surfaces of the first polarization splitting prism 2, and respectively receive one of the two linearly polarized light beams and deflect the polarization direction of the one linearly polarized light beam;
the first reflecting mirror 4 and the second reflecting mirror 10 are used for reflecting the emergent light rays of the first display panel 3 and the second display panel 11 to the second polarization beam splitter prism 5; and
the second polarization beam splitter prism 5, the second polarization beam splitter prism 5 and the polarization beam splitting dielectric film of the first polarization beam splitter prism 2 are located on the same plane, and the emergent light of the first display panel 3 and the second display panel 11 is superposed with the polarization beam splitting dielectric film of the second polarization beam splitter prism 5.
In practical application, the light source 1 is an LED light source and is located at the tail of the whole 3D projection assembly, a lampshade 13 is further arranged in front of the LED light source, and the LED light source is connected with the lampshade 13 to collect light of the LED light source so as to improve the utilization rate of the light source. The first display panel 3 and the second display panel 11 are LCD display panels.
In this embodiment, to realize the 3D display effect, the light emitted from the light source 1 is separated into two spatially perpendicular linearly polarized lights (P light and S light) by the first polarization splitting prism 2, the P light enters the first display panel 3 attached to one light-emitting surface of the first polarization splitting prism 2, the S light enters the second display panel 11 attached to the other light-emitting surface of the first polarization splitting prism 2, the polarization directions of the P light and the S light are respectively deflected by the first display panel 3 and the second display panel 11, the first display panel 3 and the second display panel 11 respectively display left and right eye pictures, and then the first reflector 4, and the second reflective mirror 10 reflects the outgoing light rays of the first display panel 3 and the second display panel 11 to the second polarization splitting prism 5, respectively, and the outgoing light rays of the first display panel 3 and the second display panel 11 are superposed on the polarization splitting dielectric film of the second polarization splitting prism 5. Through the optical characteristics between two display panels, two PBS prisms and two reflectors, a light path with a simple structure is formed, 3D projection of a single light source can be realized, two groups of pictures are synchronously displayed, and the 3D projection effect is enhanced.
In some embodiments, the first reflective mirror 4 forms an angle of 45 ° with the first display panel 3, the second reflective mirror 10 forms an angle of 45 ° with the second display panel 11, two light incident surfaces of the second polarization splitting prism 5 respectively coincide with two light emergent surfaces of the first polarization splitting prism 2, the emergent light of the first display panel 3 and the emergent light of the second display panel 11 form a mirror image by taking the polarization splitting dielectric film as a symmetry axis, and the emergent light of the first display panel 3 and the emergent light of the second display panel 11 coincide with the same position of the polarization splitting dielectric film of the second polarization splitting prism 5.
In some embodiments, the polarization angle of the incident light of the first display panel 3 is perpendicular to the transmission axis of the upper polarizer of the first display panel 3, and the polarization angle of the incident light of the second display panel 11 is perpendicular to the transmission axis of the upper polarizer of the second display panel 11. That is, the P light is perpendicular to the upper Polarizer (POL) transmission axis of the first display panel 3, and the S light is perpendicular to the upper Polarizer (POL) transmission axis of the second display panel 11.
In some embodiments, the 3D projection assembly of the present embodiment further includes:
the first lens 12 is positioned between the light emitting side of the light source 1 and the first polarization beam splitter prism 2 and is used for converting the light emitted by the light source 1 into approximately parallel light;
the second lens 6 is located on the light emitting side of the second polarization beam splitter prism 5, and the light incident surface of the second lens 6 is parallel to the light emitting surface of the second polarization beam splitter prism 5, and is used for converging the emergent light of the second polarization beam splitter prism 5.
In practical application, the first lens 12 and the second lens 6 are fresnel lenses, the first lens 12 can be fixed above the lampshade 13, the first polarization beam splitter prism 2 is located in front of the first lens 12, the light-emitting surface of the first polarization beam splitter prism 2 is parallel to the light-emitting surface of the first lens 12, the light emitted by the light source 1 is changed into approximately parallel light by the first lens 12, the light is separated into P light and S light which are vertical in space after passing through the polarization beam splitting dielectric film of the first polarization beam splitter prism 2, the P light enters the first display panel 3, the S light enters the second display panel 11, the polarization directions of the P light and the S light are deflected by the first display panel 3 and the second display panel 11 respectively, and the emergent light of the first display panel 3 and the second display panel 11 is reflected to the second polarization beam splitter prism 5 by the first reflector 4 and the second reflector 10 respectively, emergent rays of the first display panel 3 and the second display panel 11 are superposed on the polarization splitting dielectric film of the second polarization splitting prism 5, and the emergent rays of the second polarization splitting prism 5 are converged through the second lens 6.
In order to project the picture of the polarizing splitting medium film overlapped on the second polarizing splitting prism 5, in some embodiments, the 3D projection module of the embodiment further includes:
and the projection lens 7 is positioned in front of the second lens 6 and is used for projecting the emergent light rays of the second lens 6.
The emergent light of the second polarization beam splitter prism 5 is converged by the second lens 6 and then projected to a projection screen 8 or a wall or the like through the projection lens 7, so that the projection of a 3D picture is realized. Through the optical characteristics between the two display panels, the two PBS prisms and the two reflectors, 3D projection display of a single light source and a single lens can be realized.
In order to further improve the light transmittance of the display panel and improve the brightness of the 3D projected image, in some embodiments, the first display panel 3 and the second display panel 11 are LCD panels with a single polarizer, the LCD panels have a color film, and the single polarizer is an upper polarizer. By removing the polarizers below the LCD panel, the LCD panel with two single polarizers is used for respectively displaying left and right eye pictures, the reduction of the original lower polarizer filtering to the light brightness is avoided, the light transmittance of the display panel is improved, the transmittance can reach more than 20%, the problem of low 3D projection brightness is effectively solved, the 3D display effect can be enhanced, and meanwhile, the cost of the 3D projection equipment is also reduced. It can be understood that 3D display can be satisfied when the refresh rate of the LCD panel reaches 60Hz, and a better 3D projection display effect can be achieved.
Under some circumstances, 3D projection display is not needed, the switching between common projection and 3D projection can be realized through the 3D projection assembly provided by the embodiment, that is, when 3D projection is not needed, the first display panel 3 or the second display panel 11 is closed, normal projection display can be realized by closing the single-side display panel, and through the optical characteristics between two display panels, two PBS prisms and two reflectors, the switching between common projection and 3D projection under a single light source and a single lens can be simply realized without additional equipment.
Fig. 2 shows a schematic structural diagram of another 3D projection assembly, and as shown in fig. 2, in some embodiments, the 3D projection assembly of this embodiment further includes:
and the lambda/4 glass slide 14 is positioned in front of the second polarization splitting prism 5 and is used for converting the two spatially vertical linearly polarized light beams emitted by the second polarization splitting prism 5 into circularly polarized light with opposite rotation directions.
In practical applications, the λ/4 glass slide 14 may be disposed between the second polarization splitting prism 5 and the second lens 6, or between the second lens 6 and the projection lens 7, and this embodiment is not limited to this. The lambda/4 glass slide 14 converts two spatially perpendicular linearly polarized lights emitted by the second polarization beam splitter prism 5 into circularly polarized lights with opposite rotation directions, so that the visual effect is improved, and the problem of poor visual effect caused by shaking of the head of a person under some conditions is avoided.
Fig. 3 illustrates the 3D imaging principle of the 3D projection assembly of this embodiment, because the images displayed on the outer sides of the first display panel 3 and the second display panel 11 are in a mirror image relationship with the polarization beam splitting dielectric film as a symmetry axis, the left and right eye images respectively pass through the light of the image 1 displayed on the outer side of the first display panel 3 (the light emitted from the first display panel 3) and the light of the image 2 displayed on the outer side of the second display panel 11 (the light emitted from the second display panel 11), and are converged at the same position of the polarization beam splitting dielectric film on the second polarization beam splitter prism 5 through the reflection action of the first reflector 4 and the second reflector 10.
Fig. 4 illustrates a light emitting principle of the display panel of the 3D projection module of the present embodiment, in which LCD-a and LCD-B respectively represent the first display panel 3 and the second display panel 11, and since light incident on the LCD-a and LCD-B is polarized light, the LCD does not need to filter light through a lower polarizer, and the transmittance of the LCD panel without the lower polarizer structure can reach more than 20%, which can improve the transmittance of the whole projector and improve the brightness of the projector.
Example two
The present embodiment provides a 3D projector, including the 3D projection assembly of the first embodiment. For details of the 3D projection module, please refer to embodiment one, which is not described herein again.
The 3D projector of this embodiment, through the optical characteristic between two display panel, two PBS prisms and two reflectors, constitutes simple structure's light path, can realize the 3D projection of single light source.
EXAMPLE III
The present embodiment provides a display system, including:
the 3D projection assembly of embodiment one or the 3D projector of embodiment two;
the projection curtain 8 is used for projecting the emergent light of the second polarization beam splitter prism 5 to form a projection picture; and
and the imaging glasses 9 are used for reflecting the projection picture into human eyes.
In the display system of this embodiment, the light emitted from the light source 1 is separated into P light and S light by the first polarization beam splitter 2, the P light enters the first display panel 3, the S light enters the second display panel 11, the polarization directions of the P light and the S light are respectively deflected by the first display panel 3 and the second display panel 11 to respectively display left and right eye pictures, the emergent light of the first display panel 3 and the second display panel 11 is respectively reflected to the second polarization beam splitter 5 by the first reflector 4 and the second reflector 10, the emergent light of the first display panel 3 and the second display panel 11 is superposed on the polarization beam splitter dielectric film of the second polarization beam splitter 5 and projected onto the projection screen 8 by the projection lens 7 to form a projection picture, the light is diffused and then synchronously enters the imaging glasses 9 to reflect the projection picture to the human eye viewing the projection picture, the polarization directions of the incident light of the left and right lenses of the imaging glasses 9 are respectively the same as the transmission axes of the upper polarizers of the first display panel 3 and the second display panel 11.
When the 3D projection module or the 3D projector includes a λ/4 glass slide, the two lenses of the imaging glasses 9 are a lens which transmits left-hand polarized light and a lens which transmits right-hand polarized light, respectively.
In the 3D projection assembly provided in the embodiment of the present invention, the first polarization splitting prism separates light emitted by the light source into two spatially perpendicular linearly polarized light beams, the first display panel and the second display panel respectively deflect the polarization direction of one linearly polarized light beam, and the first reflective mirror and the second reflective mirror reflect outgoing light beams of the first display panel and the second display panel to the second polarization splitting prism, so that the outgoing light beams of the first display panel and the second display panel are superposed on the polarization splitting dielectric film of the second polarization splitting prism. Through the optical characteristics between two display panels, two PBS prisms and two reflectors, the 3D projection of a single light source can be realized, two groups of pictures are synchronously displayed, the 3D projection effect is enhanced, and the problems that the 3D projection equipment is complex in structure and high in manufacturing cost are solved.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The above-described apparatus and method embodiments are merely illustrative.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A 3D projection assembly, comprising:
a light source (1);
the first polarization beam splitter prism (2) is arranged in front of the light source (1) and is used for separating the light emitted by the light source (1) into two beams of linearly polarized light which are vertical in space;
the first display panel (3) and the second display panel (11) are respectively attached to the two light emergent surfaces of the first polarization beam splitter prism (2), and respectively receive one linearly polarized light beam of the two linearly polarized light beams and deflect the polarization direction of the linearly polarized light beam;
the first reflecting mirror (4) and the second reflecting mirror (10) are used for reflecting emergent rays of the first display panel (3) and the second display panel (11) to the second polarization beam splitter prism (5); and
the display panel comprises a second polarization splitting prism (5), wherein the second polarization splitting prism (5) and a polarization splitting dielectric film of the first polarization splitting prism (2) are located on the same plane, and emergent light of the first display panel (3) and the second display panel (11) is superposed with the polarization splitting dielectric film of the second polarization splitting prism (5).
2. The 3D projection assembly of claim 1, further comprising:
the first lens (12) is positioned between the light outlet side of the light source (1) and the first polarization splitting prism (2) and is used for changing the light rays emitted by the light source (1) into approximately parallel light;
and the second lens (6) is positioned on the light outlet side of the second polarization beam splitter prism (5), and the light inlet surface of the second lens (6) is parallel to the light outlet surface of the second polarization beam splitter prism (5) and is used for converging the emergent light of the second polarization beam splitter prism (5).
3. 3D projection assembly according to claim 2, wherein the first and second lenses (12, 6) are fresnel lenses.
4. The 3D projection assembly of claim 2, further comprising:
and the projection lens (7) is used for projecting the emergent light rays of the second lens (6).
5. 3D projection assembly according to claim 1, wherein the first mirror (4) is angled at 45 ° to the first display panel (3) and the second mirror (10) is angled at 45 ° to the second display panel (11).
6. The 3D projection assembly of claim 1, further comprising:
and the lambda/4 glass slide is positioned in front of the second polarization splitting prism (5) and used for converting two spatially vertical linearly polarized light beams emitted by the second polarization splitting prism (5) into circularly polarized light with opposite rotation directions.
7. The 3D projection assembly according to claim 1, wherein the polarization angle of the incident light of the first display panel (3) is perpendicular to the upper polarizer transmission axis of the first display panel (3), and the polarization angle of the incident light of the second display panel (11) is perpendicular to the upper polarizer transmission axis of the second display panel (11).
8. 3D projection assembly according to claim 1, wherein the first display panel (3), the second display panel (11) are LCD panels with a single polarizer, which is an upper polarizer.
9. A 3D projector, characterized in that it comprises a 3D projection assembly according to any one of claims 1 to 8.
10. A display system, comprising:
the 3D projection assembly of any one of claims 1 to 8 or the 3D projector of claim 9;
the projection curtain (8) is used for projecting the emergent light of the second polarization beam splitter prism (5) to form a projection picture; and
and the imaging glasses (9) are used for reflecting the projection picture into human eyes.
11. A display system according to claim 10, characterized in that when the 3D projection assembly or the 3D projector comprises a λ/4 slide, the two lenses of the imaging glasses (9) are a left-handed polarized light transparent lens and a right-handed polarized light transparent lens, respectively.
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| CN102436068A (en) * | 2010-09-29 | 2012-05-02 | 北京中视中科光电技术有限公司 | Projection display device |
| CN102087420A (en) * | 2010-11-30 | 2011-06-08 | 清华大学深圳研究生院 | Stereo projecting equipment |
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