CN114647092A - Stereoscopic display device and stereoscopic projection display system - Google Patents
Stereoscopic display device and stereoscopic projection display system Download PDFInfo
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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
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- G—PHYSICS
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Abstract
The application discloses stereoscopic display device and stereoscopic projection display system, this stereoscopic display device includes: the surface angle conversion assembly is arranged on the light path of the light beams of the multiple light sources and is used for performing surface angle conversion on the light beams of the multiple light sources separated in the angle space to form multiple converted light beams corresponding to the light beams of the light sources, wherein the multiple converted light beams are separated in the surface space; the modulation assembly is arranged on an emergent light path of the face angle conversion assembly and is used for modulating the multiple converted light beams to form image light; the modulation component comprises a plurality of pixel units, each pixel unit comprises a first sub-pixel unit and a second sub-pixel unit, and the polarization directions of the first sub-pixel unit and the second sub-pixel unit are perpendicular to each other, so that the first sub-pixel unit and the second sub-pixel unit respectively display two pieces of image information with parallax. By the mode, high-frame-rate stereoscopic display can be achieved.
Description
Technical Field
The application relates to the technical field of display, in particular to a stereoscopic display device and a stereoscopic projection display system.
Background
Stereoscopic projection displays have been widely used in recent years, such as 3D movies and the like, due to their better immersion and display effects; the stereoscopic projection display technology usually adopts the principle of binocular parallax, so that two eyes of an observer respectively observe different image information with parallax, thereby generating stereoscopic vision; common stereoscopic projection displays are divided into two categories: time sequence type stereo projection display and polarization type stereo projection display, wherein the time sequence type stereo projection display requires a projector to have a high frame rate, and images corresponding to a left eye and a right eye are sequentially and crossly projected and displayed on a screen in time sequence; for polarization type stereoscopic display, if a single projector is used to implement polarization type stereoscopic projection display, images matched with different polarization states need to be displayed in a time sequence in a crossed manner, so that the left eye and the right eye sequentially observe the corresponding image information in the time sequence, and therefore, the method still sacrifices the frame rate, and the projector needs to have a frame rate 2 times to implement high-frame-rate stereoscopic display. Therefore, the existing technical solutions provide a great challenge for a single projector to implement high frame rate display, and especially when a liquid crystal display panel is used as a spatial light modulator, it is difficult to implement high frame rate due to the limitation of the corresponding frequency of the liquid crystal display panel.
Disclosure of Invention
The application provides a stereoscopic display device and a stereoscopic projection display system, which can realize high-frame-rate stereoscopic display.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a stereoscopic display device including: the surface angle conversion assembly is arranged on the light path of the light beams of the multiple light sources and is used for performing surface angle conversion on the light beams of the multiple light sources separated in the angle space to form multiple converted light beams corresponding to the light beams of the light sources, wherein the multiple converted light beams are separated in the surface space; the modulation assembly is arranged on an emergent light path of the face angle conversion assembly and is used for modulating the multiple converted light beams to form image light; the modulation assembly comprises a plurality of pixel units, each pixel unit comprises a first sub-pixel unit and a second sub-pixel unit, the polarization directions of the first sub-pixel unit and the second sub-pixel unit are perpendicular to each other, and the plurality of converted light beams with spatially separated surfaces are irradiated onto the first sub-pixel unit and the second sub-pixel unit, so that the first sub-pixel unit and the second sub-pixel unit respectively display two pieces of image information with parallax.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a stereoscopic projection display system including: the light-emitting component is used for generating a plurality of light source beams; the stereoscopic display device is arranged on the light path of the plurality of light source beams and used for displaying the plurality of light source beams, and the stereoscopic display device is the stereoscopic display device in the technical scheme.
Through the scheme, the beneficial effects of the application are that: the application provides a scheme for matching a surface angle conversion assembly on an adjustment assembly, wherein the surface angle conversion assembly is utilized to receive a plurality of light source beams with angular space separation, the surface angle conversion assembly can perform surface angle conversion processing on the incident light source beams to obtain conversion light beams corresponding to the light source beams, and the plurality of conversion light beams with surface space separation are incident into a modulation assembly, the modulation assembly comprises a plurality of pixel units, each pixel unit comprises a first sub-pixel unit and a second sub-pixel unit, the polarization directions of the first sub-pixel unit and the second sub-pixel unit are mutually perpendicular, so that the first sub-pixel unit and the second sub-pixel unit can simultaneously display two pieces of image information with parallax, a viewer wearing polarization glasses can see the image information of three-dimensional display, and since the light beams in two polarization states are simultaneously displayed, the frequency is not sacrificed, a high frame rate stereoscopic display can also be realized using an LCD whose response speed is not very fast. In addition, because the light source beams with different colors and separated by the angle space can be converted into the converted beams which are separated by the surface space and enter the modulation assembly at different incidence angles by one surface angle conversion assembly, the separation on the space pixel position is realized, the structure is simpler, and the volume is smaller.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural diagram of a stereoscopic display device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the structure of a pixel cell in the embodiment shown in FIG. 1;
FIG. 3 is a schematic diagram of the structure of the modulating assembly of the embodiment shown in FIG. 1;
fig. 4 is a schematic structural diagram of another embodiment of a stereoscopic display device provided in the present application;
FIG. 5 is a schematic diagram of the embodiment shown in FIG. 4 with different light source beams impinging on the sub-pixels through the face angle conversion assembly;
FIG. 6 is a schematic view showing the arrangement of sub-pixels in the embodiment shown in FIG. 4;
FIG. 7 is another arrangement of sub-pixels in the embodiment of FIG. 4;
fig. 8 is a schematic structural diagram of a stereoscopic display apparatus according to another embodiment of the present application;
FIG. 9 is a schematic layout of sub-pixels in the embodiment of FIG. 8;
FIG. 10 is another schematic layout of the sub-pixels of the embodiment shown in FIG. 8;
FIG. 11 is a schematic structural diagram of a first embodiment of a stereoscopic projection display system provided by the present application;
FIG. 12 is a schematic diagram of a second embodiment of a stereoscopic projection display system provided by the present application;
FIG. 13 is a schematic diagram of a third embodiment of a stereoscopic projection display system provided by the present application;
FIG. 14 is a schematic structural diagram of a fourth embodiment of a stereoscopic projection display system provided by the present application;
FIG. 15 is a schematic view of the structure of the light emitting assembly of the embodiment shown in FIG. 14;
FIG. 16 is a schematic diagram of a fifth embodiment of a stereoscopic projection display system provided by the present application;
fig. 17 is a schematic structural diagram of a sixth embodiment of a stereoscopic projection display system provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 to 10, fig. 1 is a schematic structural diagram of an embodiment of a stereoscopic display device provided in the present application, where the stereoscopic display device 10 includes: a face angle conversion component 11 and a modulation component 12.
The surface angle conversion assembly 11 is arranged on the light path of the plurality of light source beams and is used for performing surface angle conversion on the plurality of light source beams separated in the angle space to form a plurality of converted light beams corresponding to the light source beams; specifically, the surface angle conversion assembly 11 includes a two-dimensional microlens array composed of a plurality of microlenses 111, the microlenses 111 are hexagonal, triangular, quadrilateral, elliptical or circular in shape, the plurality of light source beams can include a red light beam, a green light beam and a blue light beam, the plurality of light source beams are separated in a surface space, the plurality of converted light beams are separated in the surface space, and the light source beams and the converted light beams are in one-to-one correspondence.
The modulation assembly 12 is arranged on an emergent light path of the face angle conversion assembly 11 and is used for modulating the multiple converted light beams to form image light; specifically, the modulation component 12 may be a Device having a light beam modulation function, such as a Liquid Crystal Display (LCD), a Liquid Crystal on Silicon (LCoS), or a Digital Micromirror Device (DMD).
In a specific embodiment, as shown in fig. 2, the modulation assembly 12 includes a plurality of pixel units 20, each pixel unit 20 includes a first sub-pixel unit 21 and a second sub-pixel unit 22, the micro-lens 111 corresponds to the position of the pixel unit 20, so as to convert the plurality of light beams separated in the angular space into the converted light beams separated in the surface space, and the converted light beams are incident on the first sub-pixel unit 21 or the second sub-pixel unit 22, respectively, and each converted light beam is disposed corresponding to the first sub-pixel unit 21 or the second sub-pixel unit 22; the polarization directions of the first sub-pixel unit 21 and the second sub-pixel unit 22 are perpendicular to each other, and the multiple converted light beams with spatially separated planes are irradiated onto the first sub-pixel unit 21 and the second sub-pixel unit 22, so that the first sub-pixel unit 21 and the second sub-pixel unit 22 respectively display two pieces of image information with parallax.
The first sub-pixel unit 21 includes a plurality of first sub-pixels, the second sub-pixel unit 22 includes a plurality of second sub-pixels, the arrangement of the first sub-pixels and the second sub-pixels can be set according to specific application requirements, and the first sub-pixel unit 21 and the second sub-pixel unit 22 are symmetrically distributed along the central axis of the pixel unit 20, for example, can be symmetrically distributed along the horizontal direction or the vertical direction; or the first sub-pixel is arranged between two adjacent second sub-pixels, namely the first sub-pixel and the second sub-pixel are arranged in a crossed manner.
Further, since it is required to realize that the left and right eyes receive image information simultaneously, the image information received by the left and right eyes need to be displayed cooperatively to realize the optimal stereoscopic display effect, it is preferable that the number of the first sub-pixels is set to be equal to the number of the second sub-pixels, and the color of the first sub-pixels is the same as the color of the second sub-pixels, respectively.
It will be appreciated that for particular application requirements, such as: the left and right eyes have different eyesight, and the number and/or the color of the first sub-pixels can be different from those of the second sub-pixels, so that corresponding differential design can be carried out according to the performance of the human eyes; the number and types of the sub-pixels included in each pixel unit 20 may be set according to specific needs based on the needs of a specific application scenario, and the number of the first sub-pixels may be set to be different from the number of the second sub-pixels, or the color of the first sub-pixels may be set to be different from the color of the second sub-pixels.
In one embodiment, the first sub-pixels at least include a Red sub-pixel (R, Red), a Green sub-pixel (G, Green), and a Blue sub-pixel (B, Blue), and the second sub-pixels at least include a Red sub-pixel, a Green sub-pixel, and a Blue sub-pixel.
In another embodiment, the plurality of first sub-pixels includes at least a cyan sub-pixel, a magenta sub-pixel, and a yellow sub-pixel, and the plurality of second sub-pixels includes at least a cyan sub-pixel, a magenta sub-pixel, and a yellow sub-pixel.
It should be understood that the arrangement manner of the sub-pixels in the first sub-pixel unit 21 or the second sub-pixel unit 22 may not only be 3 sub-pixels commonly used at present, but also may be 4 sub-pixels or more than 4 sub-pixels, and may also be two-dimensionally arranged in a 2 × 2 manner, which is not limited in this embodiment.
In one particular embodiment, as shown in FIG. 3, modulating assembly 12 is an LCD that includes: a first polarizer 121, a liquid crystal cell 122, and a first analyzer 123.
A first polarizer 121 disposed on an optical path of the converted light beam for converting the incident converted light beam into a polarized light beam; specifically, the first polarizer 121 may adopt a polarizing plate having the same front polarization state, that is, the first polarizer 121 has a first polarization direction, and the first polarizer 121 may be arranged in a two-dimensional cell structure matching the two-dimensional microlens array, or may not be arranged in a two-dimensional cell structure but may be an integrated structure as long as the polarization state of the incident light beam can be polarized.
The liquid crystal cell 122 is disposed on the light path of the polarized light beam, and is configured to modulate the polarized light beam and output a modulated light beam; specifically, the liquid crystal cell 122 includes pixel units 20, and the sub-pixels can be controlled by controlling the driving voltage of the sub-pixels in each pixel unit 20.
The first analyzer plate 123 is disposed on the optical path of the modulated light beam, and is configured to analyze the modulated light beam; specifically, the first analyzer plate 123 includes a plurality of analyzer units (not shown in the figure), each of which includes a first analyzer unit having a first polarization direction and a plurality of second analyzer units having a second polarization direction perpendicular to the first polarization direction to match with the light beams of different polarization directions emitted from the pixel unit 20; preferably, the first analyzer plate 121 has a two-dimensional unit structure, the analyzer units correspond to the pixel units 20 one by one, the first analyzer unit corresponds to the first sub-pixel unit 21, and the second analyzer unit corresponds to the second sub-pixel unit 22, so that each analyzer unit is matched with sub-pixels at different spatial positions, and it is ensured that light beams of the same color can be converted into light beams of two polarization states.
For the application scenario that the LCD is used as the modulation component 12, the two-dimensional micro-lens array is used as the face angle conversion component 11, so that on one hand, the light effect loss caused by a light-tight structure (such as a black matrix or a thin film transistor circuit) in the LCD is improved through the regulation and control effect of the two-dimensional micro-lens array on light beams, and the maximum output brightness of the LCD is improved; on the other hand utilizes two-dimensional microlens array itself just can realize colored pixel separation, and the light source light beam can realize the separation on the spatial position through microlens 111 to can avoid the thin film transistor wire in the LCD, improve the efficiency when the light beam passes through the LCD, need not to utilize colored filter coating to carry out the pixel separation, the light efficiency loss of having avoided colored filter coating to bring, make the light efficiency utilization ratio improve, also reduced LCD's heat load simultaneously, display effect and reliability have been improved.
In a specific embodiment, referring to fig. 4 and 5, the shape of the microlenses 111 is hexagonal, the first sub-pixel unit 21 includes three first sub-pixels, and the second sub-pixel unit 22 includes three second sub-pixels, i.e., each microlens 111 corresponds to a pixel unit composed of six circular sub-pixels.
When the light beams 301R and 302R illuminate the LCD at two different angles, the micro lens 111 converges the light beams 301R and 302R with different incident angles to the first subpixel 211R and the second subpixel 212R, respectively, so as to realize selective illumination of the subpixels by the light sources with different angles; 1231a-1232a are analyzing units with different polarization directions, which can make the light beams of the same color have different polarization states at different spatial positions, so that the light beams with different polarization states at different spatial positions can enter the left and right eyes of a person, respectively, thereby realizing stereoscopic display.
In one embodiment, as shown in fig. 6, the arrangement of the sub-pixels is: the first sub-pixel unit 21 and the second sub-pixel unit 21 are symmetrical about the central axis D, three first sub-pixels 212R, 212G and 212B in the first sub-pixel unit 21 are adjacently arranged, and three second sub-pixels 222R, 222G and 222B in the second sub-pixel unit 22 are adjacently arranged; since the polarization states of the light beams emitted from the first sub-pixel unit 21 and the second sub-pixel unit 22 are perpendicular to each other, the left and right eyes of an observer wearing the polarization glasses can respectively observe two groups of pixels, and the images displayed by the two groups of pixels have parallax, so that stereoscopic display can be realized.
In another embodiment, as shown in fig. 7, the first sub-pixel 213R is disposed between two adjacent second sub-pixels 223R and 223B, the first sub-pixel 213G is disposed between two adjacent second sub-pixels 223R and 223G, the first sub-pixel unit 213 rotates along the circumferential direction by a predetermined angle (for example, 60 °) and then coincides with the second sub-pixel unit 223, the first sub-pixel 213B is disposed between two adjacent second sub-pixels 223G and 223B, the sub-pixels are arranged in a manner that two groups of sub-pixels are alternately arranged, the operation principle is similar to that of fig. 6, and will not be described herein again.
In another specific embodiment, as shown in fig. 8, the two-dimensional microlens array may be a square two-dimensional array of microlenses, the first sub-pixel unit 21 includes three first sub-pixels, the second sub-pixel unit 22 includes three second sub-pixels, and each microlens 111 corresponds to six square sub-pixels.
The square sub-pixels may be arranged as shown in fig. 9 and 10, as shown in fig. 9, the first sub-pixels 214R, 214G and 214B are arranged in parallel, the second sub-pixels 224R, 224G and 224B are arranged in parallel, and the polarization directions of the light beams emitted by the two groups of RGB sub-pixels are perpendicular to each other; or as shown in fig. 10, the first sub-pixels 215R, 215G, and 215B and the second sub-pixels 225R, 225G, and 225B are alternately disposed, and the polarization directions of the light beams emitted by the two sets of RGB sub-pixels are still perpendicular to each other, so that two image information with parallax can be displayed by using two polarization states, and polarization glasses can be matched to realize stereoscopic display.
The embodiment provides a scheme for high frame rate stereoscopic display, which adopts a modulation component matched with a two-dimensional micro-lens array, wherein each micro-lens covers at least six sub-pixels; the light source light beams separated in the angular space are input to the two-dimensional micro-lens array for surface angle conversion, and after passing through the micro-lenses, the light beams separated in the angular space are separated in the surface space, so that the light source light beams of the same color are irradiated onto the modulation assembly from different angles, the light beams can be converged onto corresponding sub-pixels through the micro-lenses, and each group of sub-pixels can realize full-color display through spatial integration; and the conversion of the light beams of the light source from the angular space to the surface space is realized by only one surface angle conversion component, so the structure is simple. In addition, because the two-dimensional microlens array is adopted as the face angle conversion component, on one hand, the light effect loss caused by a light-tight structure in the LCD is improved through the regulation and control effect of the two-dimensional microlens array on light beams, the equivalent aperture opening ratio of the LCD is improved, the maximum output brightness is improved, on the other hand, the two-dimensional microlens array is utilized to realize color pixel separation, the light effect loss caused by the use of a color filter film is avoided, the light effect utilization ratio is further improved, meanwhile, the heat load of the LCD is also reduced, and the display effect and the reliability are improved. In addition, each pixel unit comprises two groups of sub-pixel units, polarization analyzing sheets corresponding to the two groups of sub-pixel units are designed in a pixelization mode, so that the polarization directions of light beams emitted by the two groups of sub-pixel units are perpendicular to each other, and two pieces of image information with parallax are displayed respectively; after a user wears the polarized glasses, the user can observe the three-dimensional display information; and because the emergent light beams in two polarization states are displayed simultaneously, the refreshing frequency is not sacrificed, and the high-frame-rate stereoscopic display can be realized by adopting the LCD with not very fast response speed.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a stereoscopic projection display system according to a first embodiment of the present application, the stereoscopic projection display system including: the stereoscopic display device 10 and the light emitting assembly 40, the light emitting assembly 40 is used for generating a plurality of light source beams; the stereoscopic display device 10 is disposed on an optical path of the plurality of light source beams and is used for displaying the plurality of light source beams, and the stereoscopic display device 10 is the stereoscopic display device in the above embodiment.
The stereoscopic projection display system further includes a first lens assembly 50, the first lens assembly 50 is disposed on the light emitting path of the light emitting assembly 40, and is configured to convert the plurality of light source beams, so that each light source beam enters the stereoscopic display apparatus 10 at a different incident angle; specifically, the light emitting assembly 40 is disposed near the front focal plane of the first lens assembly 50, and the first lens assembly 50 may be a face angle conversion lens.
In an embodiment, please refer to fig. 12, fig. 12 is a schematic structural diagram of a stereoscopic projection display system according to a second embodiment of the present disclosure, in which the light emitting device 40 includes: two red light sources 401a-401b, two green light sources 402a-402b (not shown), and two blue light sources 403a-403b (not shown), the multi-beam light source beam including a red light beam, a green light beam, and a blue light beam.
The red light sources 401a-401b are used for generating two red light beams separated in angular space, the green light sources 402a-402b are used for generating two green light beams separated in angular space, the blue light sources 403a-403b are used for generating two blue light beams separated in angular space, and the red light sources 401a-401b, the green light sources 402a-402b and the blue light sources 403a-403b are all arranged near the front focal plane of the first lens assembly 50; specifically, the red Light sources 401a-401b, the green Light sources 402a-402b, and the blue Light sources 403a-403b may be Light Emitting Diode (LED) Light sources, and the first lens assembly 50 may be a lens or a lens group.
Further, as shown in fig. 12, three LED light sources of different colors, namely, a red LED, a green LED and a blue LED, are used as the light emitting assembly 40, and are placed near the front focal plane of the first lens assembly 50, and the six light source light beams are directly converted into light beams 311R to 312R, 311G to 312G (not shown in the figure), and 311B to 312B (not shown in the figure) of different angles through the surface angle conversion effect of the first lens assembly 50 on the incident light beams of the front focal plane, and then are incident on the LCD matched with the two-dimensional micro-lens array.
In other embodiments, the light source assembly 40 includes two complementary light sources for generating complementary light beams, the complementary light sources are disposed near the front focal plane of the first lens assembly 50, and a complementary sub-pixel corresponding to the complementary light beam is added to each pixel unit, that is, a complementary sub-pixel is added to each of the first sub-pixel unit and the second sub-pixel unit, each pixel unit includes eight sub-pixels, the color of the complementary sub-pixel may be red, green, blue, yellow, white, or the like, and the arrangement of the complementary sub-pixels and the complementary light beams can enhance the luminance or enhance the color gamut.
The light source of different colours is adopted to this embodiment and is carried out the face angle conversion through a first lens subassembly 50, and the light source light beam directly shines on the LCD that has matchd two-dimensional microlens array with different angles, has realized high light efficiency utilization ratio, and simple structure, and the cost is lower.
In another specific embodiment, please refer to fig. 13, wherein fig. 13 is a schematic structural diagram of a third embodiment of a stereoscopic projection display system provided in the present application, which is different from the second embodiment in that: the projection display system in this embodiment further includes a scattering component 60, where the scattering component 60 is disposed on the light path emitted by the light emitting component 40, and is configured to scatter the multiple light source beams to form multiple scattered light beams, and a light spot of the scattered light beam is located near the front focal plane of the first lens component 50.
Further, the scattering assembly 60 comprises six scattering devices 61-66 (scattering devices 63-66 are not shown); the red light sources 401a-401B, the green light sources 402a-402B (not shown) and the blue light sources 403a-403B (not shown) are laser light sources respectively, the red light sources 401a-401B, the green light sources 402a-402B and the blue light sources 403a-403B emit collimated light beams of three colors, which are converted into scattered light beams by the scattering devices 61-66 respectively, since the light spots of the scattered light beams are located near the front focal plane of the lens or lens group, the scattered light beams with different positions on the front focal plane are converted into light beams 321R-322R, 321G-322G (not shown) and 321B-322B (not shown) with different angles after passing through the lens or lens group, the six light beams are incident on the LCD matched with the two-dimensional micro-lens array with different angles, and the subsequent operation principle is the same as the operation principle of the stereoscopic display device 10 in the above embodiment, the detailed description is omitted, the high light efficiency utilization rate is finally achieved, the structure is simple, and the cost performance is high.
In another specific embodiment, please refer to fig. 14 and 15, fig. 14 is a schematic structural diagram of a stereoscopic projection display system according to a fourth embodiment provided in the present application, in which the light emitting assembly 40 includes six light emitting devices 411-416, the six light emitting devices 411-416 may be arranged in a two-dimensional matrix or in a hexagonal arrangement, the six light emitting devices 411-416 may be a solid light source, and the solid light source may be an LED or a combined light source of laser and phosphor powder generating phosphor after being excited.
As shown in fig. 14, the stereoscopic projection display system further includes: a second lens assembly 70, a third lens assembly 80, and a dodging device assembly 90.
The second lens assembly 70 is disposed on the light emitting paths of the six light emitting devices, and is used for shaping the six light source beams, and the second lens assembly 70 may be a lens or a lens group.
The third lens assembly 80 is disposed on the exit light path of the second lens assembly 70, and is used for converging the light beam exiting from the second lens assembly 70.
The dodging device assembly 90 is disposed on an exit light path of the third lens assembly 80, and is configured to dodge a light beam exiting from the third lens assembly 80.
The working principle of the projection display system is as follows: the light source beams emitted by the light emitting device 411 and the light emitting device 412 are shaped into beams 331a and 331b by the second lens assembly 70, and then form converging beams respectively by a third lens assembly 80 and enter the light equalizing device assembly 90, the uniform beam emitted from the light equalizing device assembly 90 is changed into two beams with different angles by the first lens assembly 50, and the two beams irradiate onto the modulation assembly, and the subsequent working principle is the same as that of the stereoscopic display device 10 in the above embodiment, and is not described herein again.
In another specific embodiment, please refer to fig. 16, fig. 16 is a schematic structural diagram of a fifth embodiment of the stereoscopic projection display system provided in the present application, and the light emitting element 40 may be a light emitting element in the above embodiment, and the working principle thereof is the same as that in the above embodiment, and is not repeated herein; as shown in fig. 16, the stereoscopic projection display system further includes a polarization beam splitter 100, where the polarization beam splitter 100 is disposed on an optical path of the plurality of light source beams and is configured to process the plurality of light source beams and emit the processed light beams into the LCoS.
The light emitting assembly 40 generates light source beams 341R-342R, 341G-342G, and 341B-342B with different angles and different colors, and the six light source beams 341R-342R, 341G-342G, and 341B-342B pass through the polarization beam splitter 100 and then irradiate onto the LCoS matched with the two-dimensional micro-lens array, and the subsequent working principle is similar to that of the stereoscopic display device 10 in the above embodiment, and is not repeated herein.
In other specific embodiments, please refer to fig. 17, fig. 17 is a schematic structural diagram of a sixth embodiment of a stereoscopic projection display system provided in the present application, and the light emitting element 40 may be a light emitting element in the above embodiment, and its working principle is the same as that in the above embodiment, which is not described herein again.
The modulation component is a DMD, and as shown in fig. 17, the projection display system further comprises a reflective device 110, a total internal reflection device 120, and a second analyzer plate 130.
The reflection device 110 is disposed on the optical path of the plurality of light source beams, and is configured to reflect the plurality of light source beams to the total internal reflection device 120, and the total internal reflection device 120 is configured to reflect the plurality of light source beams to the DMD; the second analyzer plate 130 is used for analyzing the light beam emitted from the DMD.
The light emitting assembly 40 emits light source beams 351R-352R, 351G-352G, and 351B-352B with different angles and different colors, and these light beams pass through the reflection device 110 and the total internal reflection device 120 in sequence and then irradiate onto the DMD matched with the two-dimensional micro-lens array and the second analyzer plate 130.
In other embodiments, the projection display system may further include a polarizer 140, and the second polarizer 140 is disposed on the exit light path of the total internal reflection device 120, and is configured to polarize the light beam output by the total internal reflection device 120, and input the polarized light beam to the DMD.
The scheme for realizing high-frame-rate three-dimensional display is characterized in that a mode that two groups of sub-pixel units are covered by one micro lens is adopted, each group of sub-pixel units are preferably RGB three colors, each group of RGB sub-pixels corresponds to a polarization state and a display image of a visual angle, namely the polarization directions of light beams emitted by the two groups of RGB sub-pixels are mutually vertical, an observer wears corresponding polarization glasses, namely the polarization selection directions of a left eyeglass and a right eyeglass are vertical, and the image information with parallax can be seen by left and right eyes to realize three-dimensional display; because two pieces of image information can be displayed simultaneously, a device with a higher frame rate is not needed to be used as a modulation component, and the high-frame-rate stereoscopic display can be realized by using the LCD with a low frame rate. Because the light source light beams with different colors can be incident from different angles, the surface angle conversion is carried out through the micro lens, and the light beams irradiate on the corresponding sub-pixels, so that the light efficiency utilization rate can be fully utilized.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (17)
1. A stereoscopic display apparatus, comprising:
the surface angle conversion assembly is arranged on the light path of the light source beams and is used for performing surface angle conversion on the light source beams separated in the angle space to form a plurality of conversion light beams corresponding to the light source beams, wherein the light source beams are separated in the surface space;
the modulation assembly is arranged on an emergent light path of the surface angle conversion assembly and is used for modulating the multiple converted light beams to form image light;
the modulation assembly comprises a plurality of pixel units, each pixel unit comprises a first sub-pixel unit and a second sub-pixel unit, the polarization directions of the first sub-pixel unit and the second sub-pixel unit are perpendicular to each other, and the surface-space-separated multiple converted light beams are irradiated onto the first sub-pixel unit and the second sub-pixel unit, so that the first sub-pixel unit and the second sub-pixel unit respectively display two pieces of image information with parallax.
2. The stereoscopic display apparatus according to claim 1,
the surface angle conversion assembly comprises a two-dimensional micro-lens array composed of a plurality of micro-lenses, and the micro-lenses correspond to the pixel units in position so as to convert the plurality of light source beams separated in the angular space into the converted beams separated in the surface space and then respectively enter the first sub-pixel unit or the second sub-pixel unit.
3. The stereoscopic display apparatus according to claim 1,
the first sub-pixel unit comprises a plurality of first sub-pixels, the second sub-pixel unit comprises a plurality of second sub-pixels, the number of the first sub-pixels is equal to that of the second sub-pixels, and the colors of the first sub-pixels are respectively the same as those of the second sub-pixels.
4. The stereoscopic display apparatus according to claim 3,
the first sub-pixel unit and the second sub-pixel unit are symmetrically distributed along the central axis of the pixel unit.
5. The stereoscopic display apparatus according to claim 3,
the first sub-pixel unit is overlapped with the second sub-pixel unit after rotating for a preset angle along the circumferential direction, and the first sub-pixel is arranged between two adjacent second sub-pixels.
6. The stereoscopic display apparatus according to claim 3,
the plurality of first sub-pixels at least comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel.
7. The stereoscopic display apparatus of claim 1, wherein the modulating component is a liquid crystal display, the liquid crystal display comprising:
the first polarizer is arranged on the optical path of the converted light beam and is used for converting the incident converted light beam into a polarized light beam;
the liquid crystal box comprises the pixel unit, is arranged on the light path of the polarized light beam, and is used for modulating the polarized light beam and outputting a modulated light beam;
and the first polarization analyzing plate is arranged on the light path of the modulated light beam and is used for analyzing the modulated light beam.
8. The stereoscopic display apparatus according to claim 7,
the first polarizer has a first polarization direction; the first polarization analyzing plate comprises a plurality of polarization analyzing units, each polarization analyzing unit comprises a first polarization analyzing unit and a second polarization analyzing unit, the first polarization analyzing unit is provided with the first polarization direction, and the second polarization analyzing unit is provided with a second polarization direction perpendicular to the first polarization direction.
9. The stereoscopic display apparatus according to claim 2,
the shape of the micro lens is hexagonal, triangular, quadrilateral, oval or circular.
10. A stereoscopic projection display system, comprising: the light-emitting component is used for generating a plurality of light source beams; the stereoscopic display device is disposed on an optical path of the plurality of light source beams and is used for displaying the plurality of light source beams, and the stereoscopic display device is as claimed in any one of claims 1 to 9.
11. The stereoscopic projection display system of claim 10,
the stereoscopic projection display system further comprises a first lens assembly, wherein the first lens assembly is arranged on an emergent light path of the light emitting assembly and used for converting the plurality of light source beams so that each light source beam can be emitted into the stereoscopic display device at a different incident angle, and the light emitting assembly is arranged on a front focal plane of the first lens assembly.
12. The stereoscopic projection display system of claim 11 wherein the plurality of light source beams comprises a red light beam, a green light beam, and a blue light beam, the light emitting assembly comprising:
two red light sources for generating two beams of the red light beams which are separated in angular space;
two green light sources for generating two angularly spatially separated beams of said green light;
the two blue light sources are used for generating two beams of blue light beams which are separated in angular space;
the red light source, the green light source and the blue light source are all arranged on the front focal plane of the first lens component.
13. The stereoscopic projection display system of claim 12,
the stereoscopic projection display system further comprises a scattering component, the scattering component is arranged on an emergent light path of the light-emitting component and is used for scattering the light beams from the plurality of light sources to form a plurality of scattered light beams; wherein the light spot of the scattered light beam is located at the front focal plane of the first lens assembly.
14. The stereoscopic projection display system of claim 12,
the multi-beam light source beam comprises a supplementary light beam, the light emitting assembly comprises two supplementary light sources, the supplementary light sources are used for generating the supplementary light beam, and the supplementary light sources are arranged on the front focal surface of the first lens assembly.
15. The stereoscopic projection display system of claim 10 wherein the light assembly comprises six light emitting devices arranged in a two-dimensional matrix, the stereoscopic projection display system further comprising:
the second lens assembly is arranged on the emergent light paths of the six light-emitting devices and used for shaping six light source beams;
the third lens assembly is arranged on the emergent light path of the second lens assembly and is used for converging the light beam emitted by the second lens assembly;
and the dodging device component is arranged on the emergent light path of the third lens component and is used for dodging the light beam emitted by the third lens component.
16. The stereoscopic projection display system of claim 10,
the modulation component in the stereoscopic display device is a liquid crystal silicon-attached display, and the stereoscopic projection display system further comprises a polarization beam splitter, wherein the polarization beam splitter is arranged on the light path of the light beams of the plurality of light sources and is used for processing the light beams of the plurality of light sources and enabling the processed light beams to enter the liquid crystal silicon-attached display.
17. The stereoscopic projection display system of claim 10,
the modulation component in the three-dimensional display device is a digital micromirror device, the projection display system further comprises a reflection device, a total internal reflection device and a second analyzer plate, and the reflection device is arranged on the light path of the multiple light source beams and used for reflecting the multiple light source beams to the total internal reflection device; the total internal reflection device is used for reflecting the multi-beam light source beams to the digital micromirror device; the second polarization analyzing sheet is used for analyzing and deflecting the light beam emitted by the digital micromirror device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011507011.0A CN114647092A (en) | 2020-12-18 | 2020-12-18 | Stereoscopic display device and stereoscopic projection display system |
| PCT/CN2021/133153 WO2022127556A1 (en) | 2020-12-18 | 2021-11-25 | Stereoscopic display apparatus and stereoscopic projection display system |
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| CN202011507011.0A CN114647092A (en) | 2020-12-18 | 2020-12-18 | Stereoscopic display device and stereoscopic projection display system |
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| GB2317524A (en) * | 1996-09-19 | 1998-03-25 | Sharp Kk | Three dimensional stereoscopic projection display |
| JP2001258051A (en) * | 2000-03-14 | 2001-09-21 | Mixed Reality Systems Laboratory Inc | Stereoscopic image display device |
| JP5472584B2 (en) * | 2008-11-21 | 2014-04-16 | ソニー株式会社 | Imaging device |
| JP2011059461A (en) * | 2009-09-11 | 2011-03-24 | Panasonic Corp | Projection display device |
| CN103155542A (en) * | 2010-09-24 | 2013-06-12 | 富士胶片株式会社 | Image pickup device and image pickup apparatus |
| US8848040B2 (en) * | 2010-10-08 | 2014-09-30 | 3Dv Co., Ltd. | 3D display system with active shutter plate |
| JP5982751B2 (en) * | 2011-08-04 | 2016-08-31 | ソニー株式会社 | Image processing apparatus, image processing method, and program |
| CN103460024B (en) * | 2012-02-03 | 2017-09-22 | 松下知识产权经营株式会社 | Camera device and camera system |
| CN103826530B (en) * | 2012-07-25 | 2015-12-30 | 松下电器产业株式会社 | Camera system |
| CN112805992B (en) * | 2018-10-03 | 2024-04-23 | 富士胶片株式会社 | Image pickup apparatus |
| JP2022520807A (en) * | 2019-02-18 | 2022-04-01 | アールエヌブイテック リミテッド | High resolution 3D display |
| CN213987157U (en) * | 2020-10-29 | 2021-08-17 | 深圳光峰科技股份有限公司 | Projection display system |
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