Naked-eye three-dimensional display device

Patent metadata

Field	Value
Publication number	US-2025093679-A1
Application number	US-202218039257-A
Country	US
Kind code	A1
Filing date	Jan 7, 2022
Priority date	Jan 11, 2021
Publication date	Mar 20, 2025
Grant date	—

Abstract

A naked-eye three-dimensional (3D) display device (600) is provided. The naked-eye 3D display device (600) comprises: a display component (610), comprising an array of display units (110); and a viewing angle regulator (620), comprising an array of microprism blocks (120, 620-1, 620-2, 620-3, 620-4, 620-5, 620-6). The microprism blocks (120, 620-1, 620-2, 620-3, 620-4, 620-5, 620-6) are divided into a plurality of groups, and an angle combination of a first angle (θ1) and a second angle (θ2) of each of the microprism blocks (120, 620-1, 620-2, 620-3, 620-4, 620-5, 620-6) is preset so that outgoing lights of the same group of microprism blocks converge into the same viewpoint, and outgoing lights of different groups of microprism blocks converge into different viewpoints. Hence, a plurality of different viewpoints are formed by setting angles of inclined surfaces of the microprism blocks (120, 620-1, 620-2, 620-3, 620-4, 620-5, 620-6), thereby seeing different 3D display effects from different viewing angles.

First claim

What is claimed is:

1 . A naked-eye 3D display device, comprising:
a display component; a viewing angle regulator comprising an array of microprism blocks, each of the microprism blocks comprising a first surface close to the display component and a second surface away from the display component, a light from the display component entering the microprism block through the first surface of the microprism block, and then being emitted from the microprism block through the second surface of the microprism block, the second surface of the microprism block forming a first angle with the first surface in a first direction, the second surface of the microprism block forming a second angle with the first surface in a second direction perpendicular to the first direction, an is outgoing angle of the light emitted from the second surface of the microprism block being related to the first angle and the second angle; wherein the array of microprism blocks are divided into a plurality of groups, and an angle combination of the first angle and the second angle of each of the microprism blocks is preset so that the lights emitted from the same group of microprism blocks converge into the same viewpoint, and the lights emitted from different groups of microprism blocks converge into different viewpoints.

2 . The naked-eye 3D display device according to claim 1 , wherein the display component comprises an array of display units, the array of display units is configured to simultaneously display a plurality of images with different viewing angles, the display units corresponding to each group of microprism blocks displays the image of one viewing angle, and the display units corresponding to different groups of microprism blocks display the images of different viewing angles.

3 . The naked-eye 3D display device according to claim 2 , further comprising an aperture array diaphragm located between the display component and the viewing angle regulator, wherein the aperture array diaphragm comprises an array of apertures, each of the apertures corresponds to one of the display units, and a light emitted from the display unit is propagated to the corresponding microprism block through the corresponding aperture.

4 . The naked-eye 3D display device according to claim 3 , wherein a diameter of a side of the aperture facing the display unit is less than a diameter of a side of the aperture facing the microprism block; and
the aperture is in the shape of a round column, a square column, or a polygonal column.

5 . The naked-eye 3D display device according to claim 1 , wherein the first surface of the microprism block is a plane, the second surface of the microprism block is an inclined surface relative to the first surface, and the first surfaces of the microprism blocks are coplanar; or
the second surface of the microprism block is a plane, the first surface is an inclined surface relative to the second surface, and the second surfaces of the microprism blocks are coplanar.

6 . The naked-eye 3D display device according to claim 1 , wherein the microprism block controls the outgoing angle of the light emitted from the second surface through a refraction principle;
N times a wavelength of the outgoing light is less than a side length of the microprism block, wherein N is greater than or equal to 2; and the microprism blocks belonging to the same group are scattered at different positions, and the microprism blocks belonging to the different groups are staggered.

7 . The naked-eye 3D display device according to claim 1 , wherein
the display unit comprises one or more light-emitting pixels or one or more reflective pixels; the light-emitting pixel is an LED pixel or an LCD pixel.

8 . The naked-eye 3D display device according to claim 1 , wherein the display component is a point light source.

9 . The naked-eye 3D display device according to claim 1 , further comprising:
a shielding device arranged at a junction of the microprism blocks, wherein the shielding device is a separate device located above or below the viewing angle regulator, or is integrated on the viewing angle regulator.

10 . The naked-eye 3D display device according to claim 1 , wherein the first angle and the second angle of each of the microprism blocks are set as a predetermined angle combination, so that the light emitted from each of the microprism blocks has a predetermined outgoing angle, the lights emitted from the microprism blocks in the same group converge into the same viewpoint, and the lights emitted from the is microprism blocks in different groups converge into different viewpoints.

11 . The naked-eye 3D display device according to claim 1 , wherein a grating structure is provided on the second surface of each of the microprism blocks.

12 . The naked-eye 3D display device according to claim 1 , wherein the microprism blocks in each group are arranged in at least two rows and at least two columns, and since the microprism blocks in each group are in different positions, the directions of outgoing lights from the microprism blocks in each group are different, so as to converge the outgoing lights to one viewpoint.

Assignees

• Svg Tech Group Co Ltd
• Univ Soochow

Inventors

• Qiao Wen
• Chen Linsen
• Hua Jianyu
• Shi Jiacheng
• Li Ruibin
• Zhou Zhen
• Luo Minghui
• Pu Donglin
• Zhu Pengfei
• Cheng Tangdong

Classifications

• G02B30/33

  involving directional light or back-light sources · CPC title

• G02B30/36 Primary

  using refractive optical elements, e.g. prisms, in the optical path between the images and the observer · CPC title

• G02B5/021

  the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures · CPC title

• G02B27/0972

  Prisms (prisms per se G02B5/04) · CPC title

• G02B30/26 Primary

  of the autostereoscopic type · CPC title