WO2019041812A1 - 显示系统和显示方法 - Google Patents
显示系统和显示方法 Download PDFInfo
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- WO2019041812A1 WO2019041812A1 PCT/CN2018/081704 CN2018081704W WO2019041812A1 WO 2019041812 A1 WO2019041812 A1 WO 2019041812A1 CN 2018081704 W CN2018081704 W CN 2018081704W WO 2019041812 A1 WO2019041812 A1 WO 2019041812A1
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- light
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- compressed
- light field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N13/307—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using fly-eye lenses, e.g. arrangements of circular lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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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
- G02B30/26—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 autostereoscopic type
- G02B30/30—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 autostereoscopic type involving parallax barriers
- G02B30/32—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 autostereoscopic type involving parallax barriers characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
- G02B2027/0174—Head mounted characterised by optical features holographic
Definitions
- the present disclosure relates to the field of display technologies, and in particular, to a display system and a display method.
- the displayed 3D object is a stereoscopic vision formed by displaying different images to the left and right eyes of the user respectively, and there is a convergence adjustment conflict due to the 3D display based on binocular stereo vision.
- the problem is that the user will cause eye fatigue and dizziness when worn for a long time.
- This is an urgent problem to be solved in the stereo display. See Figure 1-2 (1, 2 and 3 in the figure represent the left eye, the right eye and the display respectively). , L and L' respectively represent the convergence distance and the focus distance), wherein FIG. 1 shows a schematic diagram of the case where the human eye observes the real world, and FIG.
- FIG. 2 shows a schematic diagram of the stereoscopic 3D display in the related art, as shown in FIG. 1-2. It is shown that when the human eye observes the real world, the convergence distance L and the focus distance L′ are equal, so there is no problem of convergence adjustment, that is, focus-focus contradiction, and the convergence distance L and the focus distance L′ are greatly different in stereoscopic 3D display. Therefore, the problem of convergence regulation conflict is obvious.
- An object of the present disclosure is to provide a display system and a display method, which realize a near-eye display mode and a light field display, and solve the problem of vertigo and visual fatigue caused by long-term viewing of a stereoscopic 3D image formed by two two-dimensional images with parallax. .
- a display system comprising:
- An optical waveguide having a first surface and a second surface parallel to the first surface, the first surface including a light incident region and a light exit region, wherein light incident to the light incident region passes through Emitting from the light exiting region after propagation in the optical waveguide;
- a compressed light field module is arranged to synthesize a compressed light field comprising a display image, the compressed light field being emitted to the light incident region.
- the compressed light field module includes a beam splitter and first and second spatial light modulators.
- an angle between a plane where the first spatial light modulator is located and a plane where the beam splitter is located is 45 degrees, and the second spatial light modulator is located away from the first A position of the spatial light modulator with respect to a mirrored position of the beam splitter a predetermined distance.
- the compressed light field module includes first and second display panels disposed parallel to the light incident region and sequentially arranged in a light incident direction.
- the compressed light field module includes a display panel and a zoom lens that are disposed in parallel with the light incident region and are sequentially arranged in a light incident direction.
- the light incident to the light incident region is emitted from the light exit region after being propagated in the optical waveguide, including: incident perpendicular to the light incident region The light exits the light exiting region in a direction perpendicular to the light exiting region after propagating through the optical waveguide.
- the display system further includes:
- An incident holographic reflective film disposed on the second surface corresponding to the light incident region
- An exit holographic reflective film disposed on the second surface corresponding to the light exiting region.
- the incident holographic reflective film or the outgoing holographic reflective film is a red, green, and blue holographic reflective film that is sequentially laminated.
- the display system further includes a microlens array formed between the light exiting region and the human eye and parallel to the first surface.
- microlens array is a two-layer microlens array.
- the two-layer microlens array is formed as a Kepler telescope type eyepiece.
- a display method which is applied to the foregoing display system, the display method comprising:
- the compressed light field is coupled out of the optical waveguide through the light exit region.
- the compressed light field module includes a beam splitter, a first spatial light modulator, and a second spatial light modulator.
- the compressed light field module includes first and second display panels disposed parallel to the light incident region and sequentially arranged in a light incident direction.
- the compressed light field module includes a display panel and a zoom lens that are disposed in parallel with the light incident region and are sequentially arranged in a light incident direction.
- the light field is projected and coupled into the optical waveguide by the compressed light field module, and then the optical field is coupled out of the optical waveguide to be seen by the human eye, and the near-eye display mode and the light field display are realized, thereby avoiding focus-focusing.
- the light field display effect is further enhanced by providing a microlens array between the light exiting region of the optical waveguide and the human eye.
- the effect of further enhancing the light field display effect is increased. Field of view.
- Figure 1 shows a schematic diagram of a situation in which the human eye observes the real world.
- Fig. 2 shows a schematic diagram of a stereoscopic 3D display in the related art.
- Figure 3 shows a schematic diagram of a microlens array for light field display.
- Figure 4 shows a schematic diagram of a stacked light field display based on a multi-layer screen.
- FIG. 5 shows a schematic diagram of a display system in accordance with an example embodiment of the present disclosure.
- FIG. 6 illustrates a schematic diagram of a stacked light field display based on a beam splitter according to an exemplary embodiment of the present disclosure.
- FIG. 7 illustrates a schematic diagram of another embodiment of a compressed light field module in a display system in accordance with an example embodiment of the present disclosure.
- FIG. 8 illustrates a schematic diagram of yet another embodiment of a compressed light field module in a display system in accordance with an example embodiment of the present disclosure.
- FIG 9 illustrates a schematic diagram of another embodiment of an optical waveguide coupled compressed light field in a display system, in accordance with an example embodiment of the present disclosure.
- FIG. 10 illustrates a schematic diagram of a display method according to an example embodiment of the present disclosure.
- Example embodiments will now be described more fully with reference to the accompanying drawings.
- the example embodiments can be embodied in a variety of forms, and should not be construed as being limited to the examples set forth herein; the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
- numerous specific details are set forth However, one skilled in the art will appreciate that one or more of the specific details may be omitted or other methods, components, devices, steps, etc. may be employed.
- It is an object of the present disclosure to provide a display system including: an optical waveguide having a first surface and a second surface parallel to the first surface, the first surface including a light incident region and a light exit region, wherein light incident to the light incident region is emitted from the light exit region after propagating through the optical waveguide; and the compressed light field module is configured to synthesize a compressed light field including the display image, The compressed light field is emitted to the light incident region.
- FIG. 3 shows a schematic diagram of a light field display by a microlens array
- FIG. 4 shows a schematic diagram of a stacked light field display based on a multi-layer screen
- FIG. 6 illustrates a schematic diagram of a stacked light field display based on a beam splitter according to an exemplary embodiment of the present disclosure
- FIG. 7 illustrates a schematic diagram according to an exemplary embodiment of the present disclosure.
- FIG. 8 shows a schematic diagram of yet another embodiment of a compressed light field module in a display system in accordance with an example embodiment of the present disclosure
- the light field display provides a feasible method to solve the user's eye fatigue and vertigo. By simulating the light field of natural 3D objects, natural 3D display is realized, which reduces the fatigue and dizziness of the human eye. There are various ways to realize the light field display. The implementation of the light field display adopted in the present disclosure is respectively introduced below.
- the light field display based on the microlens array is introduced.
- Integrated imaging display using a microlens array is one of the ways to achieve light field display, as shown in Figure 3 (31-35 in the figure represents natural image, display, microlens array, 3D image and observer), display
- the two-dimensional natural image (planar apple) 31 shown in 32 forms a three-dimensional image 34 (stereo apple) after passing through the microlens array 33, thereby realizing light field display.
- a liquid crystal screen or other type of display panel/display as a spatial light modulation unit for multi-layer light field display, which modulates incident light by gradation values of corresponding pixels or even sub-pixel positions between layers (from backlight The light intensity of the source), the gray value of the corresponding pixel of each layer of the liquid crystal screen determines the light intensity transmission rate.
- ⁇ 1 , ⁇ 2 , ⁇ 1 are the pixel positions of the A layer and the B layer, respectively, and the output light intensity of the two beams can be expressed as
- I OUT ( ⁇ 1 , ⁇ 1 ) I in ⁇ T A ( ⁇ 1 )+ ⁇ T B ( ⁇ 1 )
- I OUT ( ⁇ 2 , ⁇ 1 ) I in ⁇ T A ( ⁇ 2 )+ ⁇ T B ( ⁇ 1 )
- T A ( ⁇ 1 ) and T A ( ⁇ 2 ) represent the light intensity transmission rates of the A layer at the ⁇ 1 and ⁇ 2 positions, respectively.
- T B ( ⁇ 1 ) represents the light intensity transmission rate of the layer B at the ⁇ 1 position. Therefore, the two beams have different light intensities. Based on this model, although different rays pass through the same pixel of a certain layer of liquid crystal screen, they must pass through different pixels of another layer of the screen at a certain distance and thus realize different light field intensity information. According to this principle, the control of the light field can be realized by controlling the display images of the liquid crystal screens of different layers.
- the key to the reconstruction of the light field is to calculate the gray value of each pixel of each layer image, and compare the reconstructed light field with the target light field, and find the most worrying solution by giving the initial structure and using the iterative algorithm.
- the specific algorithm will not be described here.
- the only certain points on the two planes can determine the direction of the light.
- the pixels on the two-layer screen can determine the light intensity of the light in different directions by using gray scale modulation.
- a double-layer display multi-frame display can be considered.
- the display system of the present disclosure includes an optical waveguide 51 having a first surface 511 and a second surface 512 parallel to the first surface, the first surface including a light incident region 5111 and light exit region 5112, in one possible embodiment, the first surface is located on a side close to the human eye.
- the light exiting region is located at one end of the optical waveguide corresponding to the human eye, and the light incident region is located at the other end of the optical waveguide remote from the light incident region.
- the light incident on the light incident region is emitted from the light exit region after being propagated through the optical waveguide; and the compressed light field module 52 is configured to synthesize a compressed light field including the display image to the light incident region.
- the compressed light field is emitted.
- the human eye By projecting and coupling the compressed light field into the optical waveguide 21, and then coupling the optical field out of the optical waveguide, the human eye can be seen, and the near-eye display mode and the light field display can be realized, thereby avoiding focus-focus contradiction, natural comfort, and no dizziness. It solves the problem of vertigo and visual fatigue caused by the human eye to watch stereoscopic 3D images formed by two two-dimensional images with parallax for a long time.
- the compressed light field module 52 includes a beam splitter mirror 5213 and first and second spatial light modulators 5211, 5212.
- Spatial light modulator means that under active control, it can modulate a certain parameter of the light field by liquid crystal molecules, for example, by modulating the amplitude of the light field, modulating the phase through the refractive index, and rotating through the polarization plane. Modulate the polarization state, or realize the conversion of incoherent-coherent light, so that certain information is written into the light wave to achieve the purpose of light wave modulation. It can easily load information into one-dimensional or two-dimensional light field, and utilize the advantages of wide bandwidth of light and multi-channel parallel processing to quickly process the loaded information.
- the most common spatial light modulator is liquid crystal light valve. Widely used in optical computing, pattern recognition, information processing, display, imaging and projection.
- the exemplary embodiment uses two spatial light modulators respectively placed on both sides of the beam splitter to synthesize a 4D compressed light field, and actually adopts the aforementioned laminated light field display principle based on a multi-layer (two) layer screen, and its optical The principle is shown in Figure 6.
- the beam splitter is a semi-transparent mirror.
- the spatial light modulator is equivalent to the display panel/display.
- the two spatial light modulators are separated in space by a half mirror.
- the mirror image 5211' of a spatial light modulator 5211 and the second spatial light modulator 5212 also form a stacked light field display effect of the multi (two) layer screen, and the second spatial light modulator 5212 does not pass through the first space on the optical path.
- the optical modulators 5211 have no interference with each other, reducing crosstalk.
- an angle between a plane where the first spatial light modulator is located and a plane where the beam splitter is located is 45 degrees, and the second spatial light modulator is located away from the first
- the position of the spatial light modulator 5211 with respect to the mirror position of the beam splitter is a predetermined distance.
- the compressed light field module 52 includes first and second display panels 5221 and 5222 arranged in parallel with the light incident region and sequentially arranged along the light incident direction.
- the exemplary embodiment adopts the foregoing multi-layer (two) layer screen-based stacked light field display mode, and thus will not be described herein.
- the compressed light field module 52 includes a display panel and zoom lenses 5231, 5232 disposed in parallel with the light incident region and arranged in the light incident direction.
- the exemplary embodiment is another way of implementing the light field display.
- a zoom lens such as a liquid crystal prism (LC lens) may be added to a display panel such as a liquid crystal display (LCD), and the liquid crystal display may be changed by adjusting the focal length of the liquid crystal prism. The position of the image on the screen.
- LC lens liquid crystal prism
- LCD liquid crystal display
- the image of different depth of field can be displayed "simultaneously" by using the "visual persistence” principle of the human eye.
- the display principle is as follows: an LC lens array with a variable focal length placed in front of the LCD, and the LCD screen and the LC lens focal length are adjusted in "1 frame" time, respectively, at 1/5, 2/5, 3/5, 4/5 5/5 frames display different pictures and focal lengths to form a longitudinal depth of field image.
- the human eye can focus on any depth of field to observe the image and produce a three-dimensional effect. For example, if a 5 depth image is to be displayed, the light field display scheme requires the LC lens to have 4 focal lengths f1-f4, and the original 1 frame image needs to be divided into 4 frames.
- the light incident to the light incident region is emitted from the light exit region after being propagated in the optical waveguide, including: incident perpendicular to the light incident region The light exits the light exiting region in a direction perpendicular to the light exiting region after propagating through the optical waveguide, thereby inputting the human eye at an optimum angle to ensure an optimal visual effect.
- the display system further includes: an incident holographic reflective film 531 disposed on the second surface corresponding to the light incident region, and corresponding to the second surface A holographic reflection film 532 is emitted from the light exiting region.
- the incident holographic reflective film or the outgoing holographic reflective film is a red, green, and blue (RGB) holographic reflective film that is sequentially laminated.
- the RGB three wavelengths of light in the light field are respectively coupled into the optical waveguide through the RGB holographic reflection film, and the holographic reflection film reflects the light of a specific incident angle at a specific wavelength.
- the holographic reflection film also illuminates the light field.
- the optical waveguide is coupled out.
- the present disclosure is not limited thereto, and as shown in FIG.
- an incident reflection surface 911 may be provided at a position corresponding to a light incident region in the optical waveguide 91, and an exit reflection surface may be provided at a position corresponding to the light exit region in the optical waveguide. 912. It is also possible to couple the light field light into the optical waveguide to propagate in the optical waveguide, and then couple the light field light out of the optical waveguide (the position of the light incident region and the light exit region of the optical waveguide in FIG. 9) In the reverse of FIG. 5, the left and right positions of the light incident region and the light exiting region of the visible light guide are not particularly limited, and the technical effects of the present disclosure can be achieved.
- the display system further includes a microlens array 54 formed between the light exiting region and the human eye and parallel to the first surface of the optical waveguide.
- the integrated imaging display using the microlens array is one of the ways to realize the light field display, and the present exemplary embodiment further enhances the light field display effect by providing a microlens array between the light exiting region of the optical waveguide and the human eye.
- a two-layer microlens array can also be used.
- a double-layered cylindrical microlens film is used to form the eyepiece, and the lens near the eye is smaller in focal length (the lens is thicker), and close to
- the lens of one side of the optical waveguide has a large focal length (the lens is thin), and constitutes a micro-cylindrical lens array (Doppler-type telescope array), and each corresponding microlens in the two layers has a pair of bits, which is equivalent to the double
- the layer microlens array is formed as a Kepler telescope type eyepiece that widens the field of view (FOV) of the light field conducted through the optical waveguide. That is, by providing a two-layer microlens array formed as a Kepler telescope type eyepiece between the light exiting region of the optical waveguide and the human eye, the field of view angle is increased while further enhancing the light field display effect.
- FOV field of view
- the display method of the present disclosure will be described below with reference to FIG. 10. As shown in FIG. 10, the display method applied to the aforementioned display system is as follows.
- a compressed light field including the display image is synthesized by the compressed light field module.
- the compressed light field is projected through the light incident region and coupled into the optical waveguide.
- the compressed light field is coupled out of the optical waveguide through the light exit region.
- the compressed light field module includes a beam splitter, a first spatial light modulator, and a second spatial light modulator.
- the compressed light field module includes first and second display panels disposed parallel to the light incident region and sequentially arranged in a light incident direction.
- the compressed light field module includes a display panel and a zoom lens that are disposed in parallel with the light incident region and are sequentially arranged in a light incident direction.
- the human eye by projecting and coupling a light field into an optical waveguide, and coupling the optical field out of the optical waveguide, the human eye can be seen, and the near-eye display mode and the light field display are realized, thereby avoiding focus-focus contradiction and natural comfort. , no vertigo, solve the vertigo and visual fatigue problems caused by the human eye to watch stereoscopic 3D images formed by two two-dimensional images with parallax for a long time.
- the light field display effect is further enhanced by providing a microlens array between the light exiting region of the optical waveguide and the human eye.
- the effect of further enhancing the light field display effect is increased. Field of view.
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Abstract
Description
Claims (15)
- 一种显示系统,包括:光波导,所述光波导具有第一表面和平行于所述第一表面的第二表面,所述第一表面包括光入射区域和光出射区域,其中向所述光入射区域入射的光经过在所述光波导中传播后从所述光出射区域射出;压缩光场模块,设置为合成包含显示图像的压缩光场,向所述光入射区域发射所述压缩光场。
- 根据权利要求1所述的显示系统,其中,所述压缩光场模块包括分束镜、第一空间光调制器和第二空间光调制器。
- 根据权利要求2所述的显示系统,其中,所述第一空间光调制器所在平面与所述分束镜所在平面的夹角为45度,所述第二空间光调制器位于离开所述第一空间光调制器关于所述分束镜的镜像位置一预定距离的位置。
- 根据权利要求1所述的显示系统,其中,所述压缩光场模块包括平行于所述光入射区域设置且沿光入射方向依次排列的第一、二显示面板。
- 根据权利要求1所述的显示系统,其中,所述压缩光场模块包括平行于所述光入射区域设置且沿光入射方向依次排列的显示面板和变焦透镜。
- 根据权利要求1-5任一项所述的显示系统,其中,其中所述向所述光入射区域入射的光经过在所述光波导中传播后从所述光出射区域射出包括:垂直于所述光入射区域入射的光经过在所述光波导中传播后沿垂直于所述光出射区域的方向射出所述光出射区域。
- 根据权利要求1-5任一项所述的显示系统,其中,还包括:设置于所述第二表面上对应于所述光入射区域的入射全息反射膜,以及设置于所述第二表面上对应于所述光出射区域的出射全息反射膜。
- 根据权利要求7所述的显示系统,其中,其中所述入射全息反射膜或出射全息反射膜为依次层叠的红绿蓝全息反射膜。
- 根据权利要求1所述的显示系统,其中,还包括形成在所述光出射区域和人眼之间且平行于所述第一表面的微透镜阵列。
- 根据权利要求9所述的显示系统,其中,其中所述微透镜阵列为双层微透镜阵列。
- 根据权利要求10所述的显示系统,其中,其中所述双层微透镜阵列形成为开普勒望远镜式目镜。
- 一种显示方法,应用于如权利要求1-11任一项所述的显示系统,所述显示方法包括:通过所述压缩光场模块合成包含显示图像的压缩光场;将所述压缩光场经所述光入射区域投射并耦合入所述光波导;以及将所述压缩光场经所述光出射区域耦合出所述光波导。
- 根据权利要求12所述的显示方法,其中,所述压缩光场模块包括分束镜、第一 空间光调制器和第二空间光调制器。
- 根据权利要求12所述的显示方法,其中,所述压缩光场模块包括平行于所述光入射区域设置且沿光入射方向依次排列的第一、二显示面板。
- 根据权利要求12所述的显示方法,其中,所述压缩光场模块包括平行于所述光入射区域设置且沿光入射方向依次排列的显示面板和变焦透镜。
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US16/309,570 US20210227198A1 (en) | 2017-08-31 | 2018-04-03 | Display system and display method |
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CN201710775474.7A CN107367845B (zh) | 2017-08-31 | 2017-08-31 | 显示系统和显示方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111610634A (zh) * | 2020-06-23 | 2020-09-01 | 京东方科技集团股份有限公司 | 一种基于四维光场的显示系统及其显示方法 |
CN113703176A (zh) * | 2021-09-11 | 2021-11-26 | 成都工业学院 | 基于渐变复合狭缝光栅的3d显示装置 |
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CN107367845B (zh) * | 2017-08-31 | 2020-04-14 | 京东方科技集团股份有限公司 | 显示系统和显示方法 |
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