Three-dimensional display device

Abstract

The utility model discloses a three-dimensional display device, which belongs to the field of display and comprises a liquid crystal display and a pixel liquid crystal grating array. The pixel liquid crystal grating array comprises a plurality of sub-pixel units, the sub-pixel units of the pixel liquid crystal grating array are aligned with RGB pixel units of the liquid crystal display, and the pixel liquid crystal grating array controls light beams with different diffraction angles of a 3D display pattern of the liquid crystal display. The three-dimensional display device has the advantages that the structure is compact, other reflecting mirrors and projection mirrors are not needed, the pixel liquid crystal grating is adopted as a diffraction element, the efficiency is good, the thickness is small, stray light interference is avoided, and the 3D display effect with higher quality can be provided.

Description

Technical Field

[0001] The utility model relates to the field of display, in particular to a three-dimensional display device. Background Art

[0002] The principle of naked-eye 3D display generally involves splitting the image displayed on the display through a grating or lens, allowing the human eye to perceive different images, thus achieving 3D display. However, the existing processing technology for naked-eye 3D gratings or lenses has many problems, which has prevented the large-scale mass production and use of naked-eye 3D technology.

[0003] For example, naked-eye 3D HUD displays based on binocular parallax can easily lead to visual fatigue after prolonged use. Another approach, based on holographic gratings, suffers from large processing periods and small viewing angles. Furthermore, it suffers from high processing costs, low efficiency, and stray light interference, which can seriously affect display quality. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a three-dimensional display device that is less prone to visual fatigue, has a small size, and is low in cost.

[0005] One of the purposes of this utility model is achieved by the following technical solution:

[0006] A three-dimensional display device includes a liquid crystal display and a pixel liquid crystal grating array. The liquid crystal display implements 3D display graphic output. The pixel liquid crystal grating array includes a plurality of sub-pixel units. The sub-pixel units of the pixel liquid crystal grating array are aligned with the RGB pixel units of the liquid crystal display. The pixel liquid crystal grating array controls light beams of different diffraction angles of the 3D display graphics of the liquid crystal display.

[0007] Furthermore, the pixel liquid crystal grating array is a single-layer structure, and the grating period and direction on the single-layer grating are different.

[0008] Furthermore, the pixel liquid crystal grating array is a double-layer structure, comprising an upper and lower layer, the upper and lower layers having the same grating period but different grating directions.

[0009] Furthermore, the liquid crystal display is a high-resolution liquid crystal display.

[0010] Furthermore, the thickness of the pixel liquid crystal grating array is in the micron level.

[0011] Compared to the prior art, the three-dimensional display device of the present invention includes a liquid crystal display and a pixel liquid crystal grating array. The liquid crystal display realizes 3D display graphic output. The pixel liquid crystal grating array includes multiple sub-pixel units. The sub-pixel units of the pixel liquid crystal grating array are aligned with the RGB pixel units of the liquid crystal display. The pixel liquid crystal grating array controls the different diffraction angle light beams of the 3D display graphics of the liquid crystal display. The three-dimensional display device of the present invention has a compact structure and does not require additional reflectors and projection lenses. The use of pixel liquid crystal gratings as diffraction elements has the advantages of high efficiency, thin thickness, and no stray light interference, and can provide higher quality 3D display effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of a three-dimensional display device of the present invention;

[0013] Figure 2 is a schematic diagram of a pixel liquid crystal grating array;

[0014] Figure 3 Schematic diagram of a sub-pixel single-layer multi-period structure;

[0015] Figure 4 Schematic diagram of the double-layer single-period structure of a sub-pixel.

[0016] In the figure: 1, liquid crystal display; 2, pixel liquid crystal grating array; 21, sub-pixel unit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] See also Figure 1 The present application provides a three-dimensional display device including a liquid crystal display 1 and a pixel liquid crystal grating array 2.

[0021] Liquid crystal display 1 is a high-resolution liquid crystal display. It is in communication with a 3D display control module, enabling 3D display graphics output. The RGB LED pixel units of liquid crystal display 1 are precisely aligned with the sub-pixel units of a pixel liquid crystal grating array 2. This pixel liquid crystal grating array 2 displays the data source from liquid crystal display 1 in space as a 3D effect.

[0022] Please continue reading Figure 2 The pixel liquid crystal grating array 2 includes a plurality of sub-pixel units 21. The sub-pixel units 21 of the pixel liquid crystal grating array 2 are aligned with the RGB pixel units of the liquid crystal display 1. The pixel liquid crystal grating array 2 controls light beams with different diffraction angles.

[0023] The pixel liquid crystal grating array 2 has two structural modes.

[0024] Please continue reading Figure 3 The pixel liquid crystal grating array 2 is a single-layer structure, and the grating period and orientation of the single-layer grating are different. The single-layer grating is prepared by laser direct writing optical alignment and holographic projection optical alignment.

[0025] Please continue reading Figure 4 The pixel liquid crystal grating array 2 has a double-layer structure, consisting of two layers, upper and lower, with the same grating period but different grating orientations. Controlling the orientations of the upper and lower gratings enables different diffraction beam angles. The double-layer pixel grating is fabricated using laser direct writing and holographic projection optical alignment methods.

[0026] The pixel liquid crystal grating array 2 controls light beams with different diffraction angles, and the thickness of the pixel liquid crystal grating array 2 is in the micron level.

[0027] The three-dimensional display device of the present invention has a compact structure, does not require other reflective mirrors and projection mirrors, and uses a pixel liquid crystal grating 2 as a diffraction element, which has the advantages of good efficiency, thin thickness, and no stray light interference, realizing naked-eye 3D display and providing higher-quality 3D display effects.

[0028] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvement evolutions can be made, which are equivalent modification and evolution of the above embodiments according to the utility model essential technology, and these all belong to the protection range of the utility model.

Claims

1. A three-dimensional display device, comprising a liquid crystal display, characterized in that: The three-dimensional display device also includes a pixel liquid crystal grating array, and the liquid crystal display realizes 3D display graphic output; the pixel liquid crystal grating array includes a plurality of sub-pixel units, and the sub-pixel units of the pixel liquid crystal grating array are aligned with the RGB pixel units of the liquid crystal display. The pixel liquid crystal grating array controls the light beams of different diffraction angles of the 3D display graphics of the liquid crystal display.

2. The three-dimensional display device according to claim 1, wherein: The pixel liquid crystal grating array is a single-layer structure, and the grating period and direction on the single-layer grating are different.

3. The three-dimensional display device according to claim 1, wherein: The pixel liquid crystal grating array is a double-layer structure, comprising an upper and lower layer, wherein the upper and lower layers have the same grating period but different grating directions.

4. The three-dimensional display device according to claim 1, wherein: The liquid crystal display is a high-resolution liquid crystal display.

5. The three-dimensional display device according to claim 1, wherein: The thickness of the pixel liquid crystal grating array is in the micron level.

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