Display apparatus

Patent metadata

Field	Value
Publication number	US-10606144-B2
Application number	US-201615537568-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Apr 11, 2006
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Disclosed is a display apparatus includes: a flat display panel; and a liquid crystal lens, the liquid crystal lens being positioned in a light emergent direction of the display panel, the liquid crystal lens being used for converging light emitted by the display panel towards a center plane, and the center plane being perpendicular to the display panel and passing through a vertical center line of the display panel.

First claim

The invention claimed is:

1. A display apparatus, comprising:
a flat display panel; and
a liquid crystal lens, the liquid crystal lens being positioned in a light emergent direction of the display panel, the liquid crystal lens being configured to converge light emitted by the display panel towards a direction of a center plane, and the center plane being perpendicular to the display panel and passing through a vertical center line of the display panel,
wherein the liquid crystal lens includes:
a first electrode and a second electrode which are arranged oppositely, wherein the first electrode includes a plurality of strip first sub-electrodes arranged in parallel, and each first sub-electrode extends along a direction of the vertical center line of the display panel; and
a liquid crystal layer, the liquid crystal layer being arranged between the first electrode and the second electrode;
wherein the plurality of first sub-electrodes include a middle first sub-electrode positioned at a middle position, and widths of the first sub-electrodes on a same side of the middle first sub-electrode are gradually reduced in a direction away from the middle first sub-electrode.

2. The display apparatus according to claim 1 , wherein the second electrode is a plate electrode.

3. The display apparatus according to claim 1 , wherein the liquid crystal lens includes: a first electrode and a second electrode which are arranged oppositely, wherein the first electrode includes a plurality of first sub-electrodes arranged in an array;
a liquid crystal layer, the liquid crystal layer being arranged between the first electrode and the second electrode.

4. The display apparatus according to claim 1 , wherein the display panel includes:
a first substrate and a second substrate which are arranged oppositely and in parallel, wherein the second substrate is closer to the liquid crystal lens with respect to the first substrate; and
a light correction portion, the light correction portion being borne by the first substrate or the second substrate, and the light correction portion being configured to correct incident light into emergent light perpendicular to a panel surface of the display panel.

5. The display apparatus according to claim 4 , wherein the light correction portion includes:
a diffraction grating, the diffraction grating having a grating surface and a groove surface, the groove surface including a plurality of sub-groove surfaces, and each sub-groove surface being slantingly arranged with respect to the flat display panel, wherein the grating surface is a light incident surface, and the groove surface is a light emergent surface; and
a first dielectric layer, the first dielectric layer being positioned on the groove surface of the diffraction grating, and light emerging from the diffraction grating being refracted by a light emergent surface of the first dielectric layer and becoming emergent light perpendicular to the panel surface of the display panel.

6. The display apparatus according to claim 5 , wherein the light correction portion further includes: a second dielectric layer, the second dielectric layer being positioned on the light emergent surface of the first dielectric layer, and a light emergent surface of the second dielectric layer being in parallel to the panel surface of the display panel.

7. The display apparatus according to claim 4 , wherein the light correction portion includes:
a diffraction grating, the diffraction grating having a grating surface and a groove surface, the groove surface including a plurality of sub-groove surfaces, and the sub-groove surfaces being in parallel to the panel surface of the display panel, wherein the grating surface is a light incident surface, and the groove surface is a light emergent surface.

8. The display apparatus according to claim 1 , wherein the display panel is a passive display panel, and the display apparatus further includes: a backlight module; and
the backlight module includes: a light source and a light correction portion positioned in a light emergent direction of the light source, the light correction portion being used for correcting incident light into emergent light perpendicular to a panel surface of the display panel.

9. The display apparatus according to claim 8 , wherein the backlight module further includes: a light guide plate, the light source being positioned on a side surface of the light guide plate, the light correction portion being positioned in the light emergent direction of the light guide plate, and a surface of the light guide plate, which faces the light correction portion, has a light extraction groove; and
a part of light emitted by the light source is totally reflected in the light guide plate, and another part of the light emerges from the light extraction groove and enters the light correction portion.

10. The display apparatus according to claim 9 , wherein the diffraction grating includes a plurality of engraved groove portions, the engraved groove portions are arranged in different periods, the engraved groove portions in each period are arranged into a plurality of engraved groove groups, each engraved groove group includes a same number of engraved groove portions, the engraved groove portions in a same engraved groove group are the same in shape, and the engraved groove portions in different engraved groove groups are different in shape.

11. The display apparatus according to claim 1 , wherein the first electrode further includes: at least one second sub-electrode, the second sub-electrode is arranged between two adjacent first sub-electrodes, and the second sub-electrode extending along the direction of the vertical center line of the display panel,
wherein each first sub-electrode is configured to apply a voltage with a first polarity; the second electrode is configured to apply a voltage with a second polarity, and the first polarity is opposite to the second polarity.

12. The display apparatus according to claim 1 , wherein the plurality of first sub-electrodes are separated from each other so as to be applied with different voltages respectively.

13. A display apparatus, comprising:
a flat display panel; and
a liquid crystal lens, the liquid crystal lens being positioned in a light emergent direction of the display panel, the liquid crystal lens being configured to converge light emitted by the display panel towards a direction of a center plane, and the center plane being perpendicular to the display panel and passing through a vertical center line of the display panel,
wherein the liquid crystal lens includes:
a first electrode and a second electrode which are arranged oppositely, wherein the first electrode includes a plurality of strip first sub-electrodes arranged in parallel, and each first sub-electrode extends along a direction of the vertical center line of the display panel; and
a liquid crystal layer, the liquid crystal layer being arranged between the first electrode and the second electrode,
wherein the first electrode further includes: at least one second sub-electrode, the second sub-electrode is arranged between two adjacent first sub-electrodes, and the second sub-electrode extending along the direction of the vertical center line of the display panel,
wherein each first sub-electrode is configured to apply a voltage with a first polarity; the second electrode is configured to apply a voltage with a second polarity, and the first polarity is opposite to the second polarity.

14. The display apparatus according to claim 13 , wherein the at least one second sub-electrode includes a plurality of second sub-electr

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Wang Qian
• Chen Xiaochuan
• Zhao Wenqing
• Xu Rui
• Wang Lei
• Yang Ming
• Lu Pengcheng
• Gao Jian
• Niu Xiaochen

Classifications

• G02F1/133602

  Direct backlight · CPC title

• G02F1/29 Primary

  for the control of the position or the direction of light beams, i.e. deflection · CPC title

• G02F1/13306

  Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence) · CPC title

• G02F2201/128

  field shaping · CPC title

• G02F2201/12

  electrode · CPC title