WO2021129797A1

WO2021129797A1 - Integrated imaging 3d display device based on liquid scattering layer

Info

Publication number: WO2021129797A1
Application number: PCT/CN2020/139336
Authority: WO
Inventors: 王琼华; 李爽; 夏云鹏; 邢妍; 任慧; 邓欢
Original assignee: 北京航空航天大学; 四川大学
Priority date: 2019-12-27
Filing date: 2020-12-25
Publication date: 2021-07-01
Also published as: CN110941101A

Abstract

An integrated imaging 3D display device based on a liquid scattering layer provided in the present application achieves integrated imaging 3D display by emitting a light lay by using an integrated imaging film source in a 2D image display assembly, and modulating the light lay by means of a light ray modulation assembly so as to reproduce a 3D image in a target display space region of a liquid scattering assembly. Compared with an integrated imaging 3D display device based on an optical diffusion screen, the integrated imaging 3D display device based on the liquid scattering layer has a greater 3D depth range, so that different depth planes of the reproduced 3D image can be clearly displayed. A modulation hole in the light ray modulation assembly of the present application further eliminates crosstalk of the reproduced 3D image, and an integrated imaging 3D display effect is optimized.

Description

Integrated imaging 3D display device based on liquid scattering layer

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201911373141.7, and the invention title is "an integrated imaging 3D display device based on a liquid scattering layer" on December 27, 2019, and it is incorporated by reference All content is incorporated in this application.

Technical field

This application relates to 3D display, and in particular to an integrated imaging 3D display device based on a liquid scattering layer.

Background technique

3D display is a new type of display technology, which has received great attention from scientific researchers and the industry in recent years. Integrated imaging 3D display is an important naked-eye 3D display technology, which has the advantages of true color, full parallax, and no stereoscopic viewing fatigue. The integrated imaging 3D display needs to display the micro image array that records the light field information of the original 3D object on the 2D display screen, and use the additional lens array in front of the 2D display screen to restore the light field information of the original 3D object and provide it to multiple viewers. Watch at the same time. In the integrated imaging 3D display device, affected by the distance between adjacent lens elements, the reproduced 3D image has the problem of incompleteness and discontinuity. The optical diffuser is an optical film that can spatially modulate the intensity of the incident beam, and its introduction can reproduce a continuous and complete 3D image. However, a good 3D display effect can be obtained only in a very narrow depth range near the optical diffuser, and the depth range that can clearly reproduce 3D images is smaller than that of the traditional integrated imaging 3D display without the optical diffuser. At present, there is still a lack of integrated imaging 3D display devices capable of simultaneously reproducing continuous 3D images and achieving an integrated imaging 3D depth range without optical diffusion screens.

Summary of the invention

According to an embodiment of the present application, an integrated imaging 3D display device based on a liquid scattering layer is provided. The display device includes: a 2D image display component for receiving and displaying a micro image array; a light modulation component disposed on the 2D The front of the image display component is used to modulate the light emitted by the 2D image display component and make the light reproduce the 3D image in the liquid scattering component; the liquid scattering component is arranged in front of the light modulation component and is used to modulate the light emitted by the light modulation component. The light is scattered, and continuous 3D images are reproduced in the liquid scattering component to increase the 3D depth range.

In an embodiment, the components of the integrated imaging 3D display device based on the liquid scattering layer are placed in a horizontal stack.

In an embodiment, the 2D image display component may be a display screen, a projector or a receiving screen, which is located at the rear of the device and is used to receive and display the integrated imaging film source.

In an embodiment, the integrated imaging film source is composed of a single frame or a multi-frame micro image array, and each frame of the micro image array corresponds to 3D image information within the range of depth and viewing angle, and is generated by encoding multiple image elements, The each image element contains a part of the 3D image information.

In an embodiment, the light modulation component includes a modulation hole, a lens barrel plate, and a lens array.

In an embodiment, the lens array is composed of a plurality of the lens elements arranged, and is used to modulate the light emitted by the integrated imaging film source on the 2D image display component, and the liquid scattering component is located The position reproduces a 3D image, and the single lens element is composed of a single-piece lens or a multi-piece lens coaxially arranged to correspond to the arrangement of the modulation holes.

In an embodiment, the liquid scattering component is arranged in front of the lens array for reproducing a complete and continuous 3D image and increasing the 3D depth range.

In one embodiment, the liquid scattering component includes a liquid scattering layer and a container, the container is used to receive the liquid scattering layer, and the liquid scattering layer is a colloid.

In one embodiment, the colloid is a liquid colloid, which may be one of silicic acid colloid, aluminum hydroxide colloid, ferric hydroxide colloid, zirconia colloid, silver iodide colloid, protein colloid, starch colloid, and ink colloid.

In one embodiment, the molecular diameter d of the dispersoid of the colloid satisfies the formula (1):

1nm≤d≤100nm (1)

In an embodiment, the refractive index n of the colloid satisfies formula (2):

1.3≤n≤1.9 (2)

In one embodiment, the thickness h of the colloid satisfies formula (3):

h≥ΔZ ₀ (3)

Among them, ΔZ ₀ is the 3D depth range achieved by integrated imaging without an optical diffuser, and the 3D depth range with an optical diffuser is about half of it. ΔZ _{0 is} the distance L from the main plane of the conventional lens array to the imaging plane. _{The minimum distance P I that} can be distinguished by the human eye within the viewing distance is related to the lens pitch P ₀ , which satisfies the formula (4):

In an embodiment, the center plane of the liquid scattering component is located on the imaging plane of the conventional lens array, the distance L from the main plane of the conventional lens array to the imaging plane is the same as the main plane of the lens array to the center plane of the liquid scattering component The distance l satisfies formula (5):

L=l (5)

In an embodiment, the distance g from the 2D image display component to the main plane of the lens array, the distance l from the main plane of the lens array to the central plane of the liquid scattering component and the focal length of the lens elements in the lens array f satisfies formula (6) in the integrated imaging real mode:

In an embodiment, the 3D depth range ΔZ is the smallest distance P _I that the human eye can distinguish within the viewing distance, the scattering angle θ of the liquid scattering component, the lens pitch P ₀ , and the principal plane of the lens array The distance l to the center plane of the liquid scattering component is related and satisfies formula (7):

In an embodiment, the 3D viewing angle θ _{v is} related to the distance g from the 2D image display component to the main plane of the lens array, and the inner diameter a of the single modulation hole, which satisfies the formula (8):

In an embodiment, the height b of the modulation hole and the distance g from the 2D image display component to the main plane of the lens array satisfy formula (9):

b≤g (9)

The integrated imaging 3D display device based on the liquid scattering layer proposed in this application utilizes the light emitted by the integrated imaging sheet source in the 2D image display assembly, and the light is modulated by the light modulation assembly, so as to display the space in the target display space of the liquid scattering assembly. 3D images are reproduced in the area to realize integrated imaging 3D display. Compared with an integrated imaging 3D display device based on an optical diffuser, it has a larger 3D depth range.

The details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.

Description of the drawings

In order to better describe and illustrate the embodiments of the present application, one or more drawings may be referred to, but the additional details or examples used to describe the drawings should not be considered as the invention and the implementation of the present description of the present application. The scope of any one of the examples or preferred modes is limited.

FIG. 1 is a schematic diagram of the structure of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application.

2 is a schematic diagram of the viewing principle of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application.

FIG. 3 is a schematic diagram of the 3D depth range of a conventional integrated imaging 3D display device.

4 is a schematic diagram of a 3D depth range of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application.

FIG. 5 is a schematic diagram of the viewing angle principle of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application.

The reference signs in the above drawings are:

1 2D image display component; 2 light modulation component; 2-1 modulation hole; 2-2 lens barrel plate; 2-3 lens array; 3 liquid scattering component; 3-1 liquid scattering layer; 3-2 container; 4 reproduction 3D image; 5 viewer; 6 incident light; 7 outgoing light; 8 conventional lens array.

Detailed ways

In order to facilitate the understanding of the application, the application will be described in a more comprehensive manner with reference to the relevant drawings. The embodiments of the application are shown in the drawings. This application can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these examples is to make the understanding of the disclosure of this application more thorough.

Unless otherwise defined, all terms used herein have the same meaning as understood by those skilled in the technical field of the invention. The terms used in the description of the invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the application. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The orientation terms "vertical", "horizontal", "upper", "lower", "front", "rear" and similar expressions used herein are only used to illustrate the relative positions between elements, and do not mean that they are unique The implementation mode is not a limitation of the application.

Hereinafter, the integrated imaging 3D display device based on the liquid scattering layer proposed in the present application will be described in detail with reference to the multiple embodiments disclosed in the present application and the accompanying drawings.

Please refer to FIG. 1, which shows a schematic diagram of a structure of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application. The 3D display device may include a 2D image display component 1, a light modulation component 2 and a liquid scattering component 3, wherein the 2D image display component 1, the light modulation component 2, and the liquid scattering component 3 are placed horizontally and stacked in sequence.

Please refer to FIG. 2, which shows a schematic diagram of the viewing principle of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application.

The 2D image display component 1 may be a display screen, a projector or a receiving screen, which is located at the rear of the integrated imaging 3D display device, and is used to receive and display the integrated imaging film source. In an embodiment, the 2D image display component 1 may be an ultra-high-definition display screen. For example, the model of the ultra-high-definition display can be Dell UP3218K, the size of the display can be 633mm×317mm, the pixel size can be 0.0825mm, and the display resolution can be 7680×4320.

In one embodiment, the integrated imaging chip may be formed from a single frame of a source array of the micro image, the micro image array for each frame image information corresponding to the 3D depth ΔZ in the range of viewing angles θ _v. Each micro-image array is generated by encoding multiple image elements, for example, 50×30 image elements, and each image element contains a part of 3D image information corresponding to the micro-image array. The sum of the 3D image information contained in each image element above constitutes the complete 3D image information contained in each frame of the micro image array. In an embodiment, the resolution of the image element may be 121×121 pixels, and the overall resolution of the micro image array may be 7680×3840 pixels.

The light modulating component 2 includes a modulating hole 2-1, a lens barrel plate 2-2, and a lens array 2-3, which are arranged in front of the 2D image display component 1, and are used to modulate the light emitted by the 2D image display component 1 and make the light in The 3D image is reproduced in the liquid scattering component 3.

In one embodiment, the lens array 2-3 is composed of a plurality of lens elements arranged to modulate the light emitted by the integrated imaging film source on the 2D image display assembly 1 and reproduce the 3D image at the position of the liquid scattering assembly 3 . The multiple lens elements may be composed of multiple lenses arranged coaxially to correspond to the arrangement of the modulation aperture 2-1. For example, the lens array includes 50×30 lens elements and is a rectangular arrangement of three lenses. The liquid scattering component 3 is arranged in front of the light modulation component 2 for reproducing a complete and continuous 3D image and increasing the 3D depth range.

In one embodiment, the liquid scattering component 3 includes a colloid 3-1 and a container 3-2. The colloid 3-1 may be a liquid colloid. The liquid colloid has the Tyndall effect, that is, it scatters the incident light within a certain depth range, and then reproduces a complete and continuous 3D image within the 3D depth range ΔZ after scattering. The container 3-2 is used to receive the colloid 3-1.

The colloid 3-1 may be one of silicic acid colloid, aluminum hydroxide colloid, ferric hydroxide colloid, zirconia colloid, silver iodide colloid, protein colloid, starch colloid, and ink colloid. In one embodiment, the colloid 3-1 may be a protein colloid.

The molecular diameter d of the dispersoid of colloid 3-1 satisfies formula (1):

1nm≤d≤100nm (1),

For example, the molecular diameter d of the dispersoid is about 20 nm.

The refractive index n of colloid 3-1 satisfies formula (2):

1.3≤n≤1.9 (2),

For example, the refractive index n is 1.42.

The thickness h of colloid 3-1 satisfies formula (3):

h≥ΔZ ₀ (3),

_{Among them, the 3D depth range ΔZ 0} achieved by integrated imaging without an optical diffuser is related to the following factors: the distance L from the main plane of the conventional lens array 8 to the imaging plane, the minimum distance P _I that the human eye can distinguish within the viewing distance, and the lens The pitch P ₀ satisfies the formula (4):

For example, the distance L from the main plane of the conventional lens array 8 to the imaging plane can be 150mm, the minimum distance P _{I that} can be distinguished by the human eye within the viewing distance can be 1mm, and the lens pitch P ₀ can be 12.5mm, resulting in a 2D image display module. 1 The integrated imaging 3D depth range ΔZ ₀ formed by the conventional lens array 8 is 24 mm. Therefore, the thickness h of the colloid 3-1 may be 30 mm. The 3D depth range of the integrated imaging 3D display device based on the optical diffusion screen is about 12mm.

Please refer to FIG. 3, which is a schematic diagram of the 3D depth range of a conventional integrated imaging 3D display device.

The center plane of the liquid scattering component 3 is located on the imaging plane of the lens array 2-3, the distance L from the main plane of the conventional lens array 8 to the imaging plane and the distance l from the main plane of the lens array 2-3 to the center plane of the liquid scattering component 3 satisfy the formula ( 5):

L=l (5),

For example, the distance L from the main plane of the lens array to the imaging plane can be 150 mm, and the distance l from the main plane of the lens array to the center plane of the liquid scattering component can be 150 mm.

In one embodiment, the distance g from the 2D image display component 1 to the main plane of the lens array 2-3, the distance l from the main plane of the lens array 2-3 to the central plane of the liquid scattering component 3 and the distance between the lens elements in the lens array 2-3 The focal length f satisfies formula (6) in the integrated imaging real mode:

For example, the distance g from the 2D image display component to the main plane of the lens array can be 14.8 mm, the distance l from the main plane of the lens array to the central plane of the liquid scattering component can be 150 mm, and the focal length f of the lens elements in the lens array can be 13.5 mm.

Please refer to FIG. 4, which is a schematic diagram of a 3D depth range of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application. In one embodiment, the light emitted by the integrated imaging film source displayed on the 2D image display assembly 1 is modulated by the light modulation assembly 2. After the incident light 6 passes through the liquid scattering assembly 3, the outgoing light 7 is scattered from the liquid. The component 3 is emitted, and the reverse extension can give the reverse extension line of the emitted light 8. The 3D image is visible in the depth range ΔZ, where the 3D depth range ΔZ is related to the following factors: the minimum distance that the human eye can distinguish within the viewing distance P _I , the scattering angle θ of the liquid scattering component 3, the lens pitch P ₀ , and the distance l from the main plane of the lens array 2-3 to the center plane of the liquid scattering component 3 are related, and satisfy the formula (7):

_{For example, the minimum distance P I that the} human eye can distinguish within the viewing distance is 1 mm, the scattering angle θ of the liquid scattering component is 2°, the lens pitch P ₀ is 12.5 mm, and the distance from the principal plane of the lens array to the center plane of the liquid scattering component is l It is 150mm, and the depth range ΔZ can be calculated as 19mm by formula (7).

Please refer to FIG. 5, which is a schematic diagram of the viewing angle principle of an integrated imaging 3D display device based on a liquid scattering layer according to an embodiment of the present application. In one embodiment, the light emitted by the integrated imaging film source displayed on the 2D image display assembly 1 is modulated by the light modulation assembly 2. After the incident light 6 passes through the liquid scattering assembly 3, the outgoing light 7 is The liquid scattering component 3 exits, and the reverse extension can give the reverse extension line 8 of the emitted light, and the 3D image is visible within the viewing _{angle θ v.} Wherein, the viewing angle θ _{v is} related to the distance g from the 2D image display component 1 to the main plane of the lens array 2-3 and the inner diameter a of the single modulation hole 2-1, and satisfies the formula (8):

For example, the distance g from the 2D image display component 1 to the main plane of the lens array 2-3 is 14.8 mm, the inner diameter a of the single modulation hole 2-1 is 11.5 mm, and the viewing angle range θ _v is 42.4°.

In an embodiment, the height b of the modulation hole 2-1 and the distance g from the 2D image display component 1 to the main plane of the lens array 2-3 also satisfy the formula (9):

b≤g (9),

For example, the height b of the modulation hole 2-1 is 6 mm, and the distance g from the 2D image display assembly 1 to the main plane of the lens array is 14.8 mm.

The integrated imaging 3D display device based on the liquid scattering layer proposed in this application utilizes the light emitted by the integrated imaging sheet source in the 2D image display assembly, and the light is modulated by the light modulation assembly, so as to display the space in the target display space of the liquid scattering assembly. 3D images are reproduced in the area to realize integrated imaging 3D display. Compared with an integrated imaging 3D display device based on an optical diffuser, it has a larger 3D depth range. In addition, each depth plane of the reproduced 3D image can be clearly displayed. The modulation hole in the light modulation component of the display device also eliminates the crosstalk of reproducing 3D images, and optimizes the integrated imaging 3D display effect.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, it should be regarded as the scope described in this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be interpreted as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

An integrated imaging 3D display device based on a liquid scattering layer, wherein the display device includes:

The 2D image display component is used to receive and display the micro image array and emit light;

A light modulation component, arranged in front of the 2D image display component, for modulating the light emitted by the 2D image display component, and causing the light to reproduce a 3D image in the liquid scattering component;

The liquid scattering component is arranged in front of the light modulation component, and is used to scatter the light modulated by the light modulation component, reproduce continuous 3D images in the liquid scattering component, and improve the integrated imaging 3D depth range .
The integrated imaging 3D display device according to claim 1, wherein the liquid scattering component comprises a liquid scattering layer and a container, the container is configured to receive the liquid scattering layer, and the liquid scattering layer is a colloid.
The integrated imaging 3D display device according to claim 2, wherein the colloid is one of silicic acid colloid, aluminum hydroxide colloid, ferric hydroxide colloid, zirconia colloid, silver iodide colloid, protein colloid, starch colloid, and ink colloid. One kind.
The integrated imaging 3D display device according to claim 2, wherein the dispersoid molecular diameter d of the colloid satisfies: 1nm≤d≤100nm.
The integrated imaging 3D display device according to claim 2, wherein the refractive index n of the colloid satisfies: 1.3≤n≤1.9.
The integrated imaging 3D display device according to claim 2, wherein the thickness of the colloid is not less than the 3D depth range of the integrated imaging without an optical diffusion screen.