3D display device and display method

Patent metadata

Field	Value
Publication number	US-11768385-B2
Application number	US-202117355298-A
Country	US
Kind code	B2
Filing date	Jun 23, 2021
Priority date	Nov 24, 2020
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

The present disclosure relates to a 3D display device, includes: a display panel; a lens layer arranged on a light exit side of the display panel, and including a plurality of convergent lenses arranged in an array; a human eye tracker provided on a side of the lens layer away from the display panel, the human eye tracker being used to determine spatial positions of one or more viewers' eyes relative to the display panel when facing the display panel; and a controller electrically connected to the display panel and the human eye tracker, the controller being used to receive the spatial positions and control subpixels of the display panel corresponding to the spatial positions to display image slices corresponding to the spatial positions.

First claim

What is claimed is:

1. A 3D display device, comprising:
a display panel;
a lens layer arranged on a light exit side of the display panel, and comprising a plurality of convergent lenses arranged in an array;
a human eye tracker provided on a side of the lens layer away from the display panel, wherein the human eye tracker is configured to determine spatial positions of one or more viewers' eyes relative to the display panel when facing the display panel; and
a controller electrically connected to the display panel and the human eye tracker, wherein the controller is configured to receive the spatial positions and control subpixels of the display panel corresponding to the spatial positions to display image slices corresponding to the spatial positions;
wherein the 3D display device further comprises:
a polarization modulation member arranged between the display panel and the lens layer, and electrically connected to the controller;
wherein the human eye tracker is configured to determine at least two spatial positions of at least two viewers' eyes relative to the display panel when facing the display panel, the at least two spatial positions corresponding to at least two moments within a preset time period one to one;
wherein the controller is configured to control subpixels corresponding to the at least two spatial positions to start to display image slices corresponding to the at least two spatial positions at corresponding moments;
wherein the polarization modulation member is configured to, according to the at least two spatial positions, adjust polarization modulation states of the polarization modulation member to make light from the subpixels corresponding to the at least two spatial positions pass through the polarization modulation member at a corresponding moment, so that the light is incident on a correspond one of the viewers;
wherein the polarization modulation member comprises:
a first polarization modulator arranged on the light exit side of the display panel, wherein the first polarization modulator comprises a plurality of first modulation units arranged in an array, and one subpixel of the display panel corresponds to one of the first modulation units of the first polarization modulator, and the first modulation units are configured to modulate polarization states of light emitted by corresponding subpixels; and
a second polarization modulator arranged on a side of the first polarization modulator away from the display panel, wherein the second polarization modulator comprises a plurality of second modulation units arranged in an array, one of the convergent lenses in the lens layer corresponds to one of the second modulation units of the second polarization modulator, and the second modulation units are configured to modulate polarization states of light passing through the first polarization modulator and make the light pass through or block the light;
wherein the 3D display device further comprises:
a light-transmitting substrate arranged between the first polarization modulator and the second polarization modulator;
wherein the display panel and the lens layer meets the following relational expressions:

L
f

=

w

P
x

L

L
+
f

-

D
1

D
2

D
2

=

N
*

P
x

t
=

n
*
f

where L is a viewing distance from the viewers' eyes to the light-transmitting substrate; f is a focal length of each convergent lens in air; D 1 is a width of each convergent lens, D 2 is a width of a pixel island, and D 1 ≤D 2 ; N is a number of subpixels in a width direction of one pixel island, with a value of 4; Px is a width of a single subpixel; w is an interpupillary distance of a person, with a value of 65 mm; t is a thickness of the light-transmitting substrate; and n is a refractive index of the light-transmitting substrate.

2. The 3D display device according to claim 1 , wherein the first polarization modulator comprises a first liquid crystal phase modulator.

3. The 3D display device according to claim 1 , wherein the second polarization modulator comprises:
a second liquid crystal phase modulator configured to modulate the polarization states of the light passing through the first polarization modulator; and
a linear polarizer arranged on a side of the second liquid crystal phase modulator close to the lens layer, and configured to make the light modulated by the second liquid crystal phase modulator pass through or block the light modulated by the second liquid crystal phase modulator.

4. The 3D display device according to claim 3 , wherein each of the convergent lenses is a liquid crystal convergent lens, which serves as the second liquid crystal phase modulator of the second polarization modulator, and the linear polarizer is arranged on a side of the lens layer away from the display panel.

5. The 3D display device according to claim 1 , wherein the spatial positions are viewing zone order numbers and view numbers.

6. A display method for a 3D display device, wherein the 3D display device comprises:
a display panel;
a lens layer arranged on a light exit side of the display panel, and comprising a plurality of convergent lenses arranged in an array;
a human eye tracker provided on a side of the lens layer away from the display panel, wherein the human eye tracker is configured to determine spatial positions of one or more viewers' eyes relative to the display panel when facing the display panel; and
a controller electrically connected to the display panel and the human eye tracker, wherein the controller is configured to receive the spatial positions and control subpixels of the display panel corresponding to the spatial positions to display image slices corresponding to the spatial positions;
wherein the method comprises:
determining spatial positions of one or more viewers' eyes relative to a display panel when facing the display panel; and
controlling subpixels of the display panel corresponding to the spatial positions to display image slices corresponding to the spatial positions;
wherein the determining spatial positions of one or more viewers' eyes relative to a display panel when

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yang Junxing
• Hong Tao
• Ma Sen

Classifications

• G02B30/27 Primary

  involving lenticular arrays · CPC title

• G02F1/133538

  with spatial distribution of the polarisation direction · CPC title

• H04N13/305

  using lenticular lenses, e.g. arrangements of cylindrical lenses · CPC title

• G09G3/003

  to produce spatial visual effects · CPC title

• H04N13/383

  for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes · CPC title