CN110941101A - Integrated imaging 3D display device based on liquid scattering layer - Google Patents
Integrated imaging 3D display device based on liquid scattering layer Download PDFInfo
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- CN110941101A CN110941101A CN201911373141.7A CN201911373141A CN110941101A CN 110941101 A CN110941101 A CN 110941101A CN 201911373141 A CN201911373141 A CN 201911373141A CN 110941101 A CN110941101 A CN 110941101A
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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
- G02B30/27—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 lenticular arrays
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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
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
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Abstract
The invention provides an integrated imaging 3D display device based on a liquid scattering layer, which comprises a 2D display screen, a lens array and the liquid scattering layer, wherein the 2D display screen is positioned at the bottommost layer and sequentially comprises the lens array and the liquid scattering layer from top to bottom. The 2D display screen is used for displaying the integrated imaging micro-image array. The lens array is used for modulating light rays emitted by the micro image array displayed on the 2D display screen and reproducing a 3D image at the position of the liquid scattering layer. The liquid scattering layer is used for scattering light modulated by the lens array, continuous 3D images are reproduced in the liquid scattering layer, and the traditional integrated imaging 3D depth range without the optical diffusion screen is achieved. The integrated imaging 3D display device based on the liquid scattering layer can reproduce continuous and complete 3D images, and meanwhile, the integrated imaging 3D depth range is kept.
Description
One, the technical field
The invention relates to the technical field of 3D display, in particular to an integrated imaging 3D display device based on a liquid scattering layer.
Second, background Art
As an important naked eye 3D display technology, the integrated imaging 3D display has the advantages of true color, full parallax, no stereoscopic viewing asthenopia and the like. The integrated imaging 3D display needs to display a micro image array containing light field information of an original 3D object on a 2D display screen, and the light field information of the original 3D object is recovered by utilizing a lens array attached in front of the 2D display screen.
In the conventional integrated imaging 3D display device, there is a problem in that a reproduced 3D image is discontinuous due to the distance between adjacent lens elements. The optical diffusion screen is a device capable of spatially modulating the light intensity of an incident light beam, and the introduction of the device can reproduce a continuous and complete 3D image, however, a better 3D reproduction effect can be obtained only in a limited depth range near the optical diffusion screen, and the depth range capable of clearly reproducing the 3D image is smaller than the depth of a traditional integrated imaging 3D display without the optical diffusion screen. Currently, there is still a lack of a method that can simultaneously reproduce continuous 3D images and achieve conventional integrated imaging 3D depth ranges without an optical diffuser screen.
Third, the invention
In order to solve the above problems, the present invention provides an integrated imaging 3D display device based on a liquid scattering layer. The device comprises 2D display screen, lens array and liquid scattering layer, and the 2D display screen is located the bottom, and up is lens array and liquid scattering layer in proper order.
The 2D display screen is used for displaying the integrated imaging micro-image array.
The lens array is used for modulating light rays emitted by the micro image array displayed on the 2D display screen and reproducing a 3D image at the position of the liquid scattering layer. The lens array is composed of a plurality of lens elements in an arrangement. The lens unit is composed of a single-chip lens or a plurality of chip lenses which are coaxially arranged, the focal length of the lens unit is f, and the pitch of the lens unit is P0。
The arrangement mode of the lens elements comprises rectangular arrangement or hexagonal arrangement and the like.
Wherein the shape of the lens element comprises a circle, a square or a hexagon.
Wherein, the surface type of each lens comprises a spherical lens or an aspherical lens.
The liquid scattering layer is used for scattering light modulated by the lens array, continuous 3D images are reproduced in the liquid scattering layer, and the traditional integrated imaging 3D depth range without the optical diffusion screen is achieved.
The liquid scattering layer is composed of liquid colloid or liquid colloid diluent, the liquid colloid has a Tyndall effect of colloid, incident light is scattered within a certain depth range, the thickness h of the liquid scattering layer is not less than an integrated imaging 3D depth range formed by the 2D display screen and the lens array, and scattered 3D images can be clearly reproduced within the 3D depth range.
Preferably, the dispersoid molecular diameter d of the liquid scattering layer satisfies: d is more than or equal to 1nm and less than or equal to 100 nm.
Preferably, the refractive index n of the liquid scattering layer satisfies: n is more than or equal to 1.3 and less than or equal to 1.9.
Preferably, the liquid scattering layer is one of a colloid such as a silicic acid colloid, an aluminum hydroxide colloid, an iron hydroxide colloid, a zirconia colloid, a silver iodide colloid, a protein colloid, a starch colloid, an ink colloid, or a dilution thereof.
The distance L from the center of the liquid scattering layer to the lens array, the distance L from the lens array to the 2D display screen and the focal length f of the lens elements in the lens array meet the following requirements in an integrated imaging real mode:
the invention provides an integrated imaging 3D display device based on a liquid scattering layer, which is characterized in that the liquid scattering layer is used for uniformly scattering a 3D image in a 3D depth range. Compared with the traditional integrated imaging 3D display device, discontinuous 3D images caused by the influence of the adjacent lens element spacing can be changed into continuous complete 3D images. Compared with an integrated imaging 3D display device based on an optical diffusion screen, the 3D display device has a larger 3D depth range, and each depth plane of a reproduced 3D image can be clearly displayed.
Description of the drawings
The foregoing aspects and features of the present invention will become further apparent and more readily appreciated from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an integrated imaging 3D display device based on a liquid scattering layer.
Fig. 2 is a schematic view of the viewing principle of an integrated imaging 3D display device based on a liquid scattering layer.
FIG. 3 is a schematic diagram of lens element shape and lens array arrangement, (a) a schematic diagram of rectangular arrangement of circular lens elements, (b) a schematic diagram of hexagonal arrangement of circular lens elements, (c) a schematic diagram of rectangular arrangement of square lens elements, and (d) a schematic diagram of hexagonal arrangement of hexagonal lens elements.
Fig. 4 is a schematic view of a liquid scattering layer.
FIG. 5 is a schematic representation of the Tyndall effect of the colloid.
The reference numbers in the figures are:
12D display screen, 2 lens array, 3 liquid scattering layer, 4 reproduced 3D image, 5 viewer, 6 incident light, 7 scattered light, 8 light source, 9 liquid colloid, 10 colloid dispersoid molecules, 11 solution, 12 solution dispersoid molecules.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Fifth, detailed description of the invention
The present invention will be described in further detail below with reference to a detailed description of an exemplary embodiment of an integrated imaging 3D display device based on a liquid scattering layer according to the present invention. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make modifications and adaptations of the present invention without departing from the scope of the present invention.
The invention provides an integrated imaging 3D display device based on a liquid scattering layer, which is structurally shown in the attached drawing 1. The device comprises 2D display screen, lens array and liquid scattering layer, and the 2D display screen is located the bottom, and up is lens array and liquid scattering layer in proper order. A schematic view of the viewing principle of the integrated imaging 3D display device based on the liquid scattering layer is shown in fig. 2.
The 2D display screen is used for displaying the integrated imaging micro-image array. In this embodiment, the 2D display screen adopts a 4K ultra high definition liquid crystal screen, and the resolution of the micro image array is 3840 × 2160, and is composed of 95 × 53 image elements.
The lens array is used for modulating light rays emitted by the micro image array displayed on the 2D display screen and reproducing a 3D image at the position of the liquid scattering layer. The lens array is composed of a plurality of lens elements which are arranged, wherein each lens element can independently image. The shape and arrangement of the lens elements are shown in fig. 3. In this embodiment, the number of lens elements included in the lens array is 95 × 53, the used lens elements are square, the lens elements are single-piece spherical lenses, the arrangement mode is rectangular, the focal length f is 3mm, and the pitch P of the lens array is0Is 1.4 mm.
The liquid scattering layer is used for scattering light modulated by the lens array, continuous 3D images are reproduced in the liquid scattering layer, and the traditional integrated imaging 3D depth range without the optical diffusion screen is achieved, and the principle of the liquid scattering layer is shown in figure 4. The liquid scattering layer is composed of liquid colloid or liquid colloid diluent, the Tyndall effect of the colloid exists, as shown in figure 5, a beam of light passes through the colloid, a light track can be observed from the direction of vertical incident light in the colloid, and the light track cannot be observed when the light passes through the solution. The liquid scattering layer scatters incident light within a certain depth range, and scattered 3D images can be clearly reproduced within the 3D depth range. In this embodiment, the liquid scattering layer is an ammonium-type silica sol diluent, the dispersoid is silica, the concentration of the silica is 15%, the molecular diameter d is between 10nm and 20nm, the refractive index n of the liquid scattering layer is about 1.4, and the thickness h is 35 mm. The distance L from the center of the liquid scattering layer to the lens array is 21mm, and the distance L from the lens array to the 2D display screen is 3.5 mm. L, L and the focal length f of the lens element satisfy the following requirements in the integrated imaging real mode:
the 3D depth range of the present embodiment can be obtained by the following equation:
wherein, PI1mm is the size of the image-side pixel, and Δ Z is calculated from the above equationm＝31.4mm。
The 3D depth range of an integrated imaging 3D display device based on an optical diffuser screen can be obtained by:
wherein Δ L is 0.17mm, θ is 5 ° is a diffusion angle of the optical diffusion screen,
' is the minimum resolution angle of human eyes, and s is 0.6m, which is the viewing distance. Delta Z 'is calculated from the above formula'm＝7.2mm。
Compared with the 3D depth range of the integrated imaging 3D display device based on the optical diffusion screen, the 3D depth range is improved and is close to the 3D depth range of the traditional integrated imaging 3D display device without the diffusion screen, and the liquid scattering layer is not limited by the optical diffusion screen on the integrated imaging 3D depth range.
The above-described apparatus embodiments are merely illustrative and not restrictive.
Claims (5)
1. An integrated imaging 3D display device based on a liquid scattering layer is composed of a 2D display screen, a lens array and the liquid scattering layer, wherein the 2D display screen is positioned at the bottommost layer and sequentially provided with the lens array and the liquid scattering layer from top to bottom; the 2D display screen is used for displaying the integrated imaging micro-image array; the lens array is used for modulating light rays emitted by the micro image array displayed on the 2D display screen and reproducing a 3D image at the position of the liquid scattering layer; the liquid scattering layer is used for scattering light modulated by the lens array, continuous 3D images are reproduced in the liquid scattering layer, and the traditional integrated imaging 3D depth range without the optical diffusion screen is achieved.
2. The integrated imaging 3D display device based on the liquid scattering layer as claimed in claim 1, wherein the liquid scattering layer is composed of liquid colloid or liquid colloid diluent, the liquid colloid has a Tyndall effect of colloid, the liquid scattering layer scatters incident light within a certain depth range, the thickness h of the liquid scattering layer is not less than the integrated imaging 3D depth range formed by the 2D display screen and the lens array, and the scattered 3D image can be clearly reproduced within the 3D depth range.
3. The integrated imaging 3D display device based on the liquid scattering layer as claimed in claim 1, wherein the diameter D of the dispersoid molecules of the liquid scattering layer satisfies: d is more than or equal to 1nm and less than or equal to 100 nm.
4. An integrated imaging 3D display device based on a liquid scattering layer according to claim 1, characterized in that the refractive index n of the liquid scattering layer satisfies: n is more than or equal to 1.3 and less than or equal to 1.9.
5. The integrated imaging 3D display device based on the liquid scattering layer according to claim 1, wherein the liquid scattering layer is one of silicic acid colloid, aluminum hydroxide colloid, ferric hydroxide colloid, zirconium oxide colloid, silver iodide colloid, protein colloid, starch colloid, ink colloid, and the like, or a dilution thereof.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911373141.7A CN110941101A (en) | 2019-12-27 | 2019-12-27 | Integrated imaging 3D display device based on liquid scattering layer |
| PCT/CN2020/139336 WO2021129797A1 (en) | 2019-12-27 | 2020-12-25 | Integrated imaging 3d display device based on liquid scattering layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911373141.7A CN110941101A (en) | 2019-12-27 | 2019-12-27 | Integrated imaging 3D display device based on liquid scattering layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522146A (en) * | 2020-05-11 | 2020-08-11 | 北京航空航天大学 | Large-size seamless spliced integrated imaging desktop 3D display device |
| WO2021129797A1 (en) * | 2019-12-27 | 2021-07-01 | 北京航空航天大学 | Integrated imaging 3d display device based on liquid scattering layer |
| CN115131419A (en) * | 2022-06-15 | 2022-09-30 | 荣耀终端有限公司 | Image processing method for forming Tyndall light effect and electronic equipment |
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