Liquid crystal grating and fabrication method thereof, and naked eye 3D display device

Patent metadata

Field	Value
Publication number	US-10795217-B2
Application number	US-201916397840-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	Dec 16, 2014
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A liquid crystal grating and a fabrication method thereof, and a display device are provided. The liquid crystal grating comprises a first substrate ( 1 ) and a second substrate ( 2 ) provided opposite to each other, and a liquid crystal layer ( 7 ); a plate-shaped transparent substrate ( 3 ) is provided on the first substrate ( 1 ), and a second transparent conductive layer ( 4 ), a transparent insulating layer ( 5 ) and a first transparent conductive layer ( 6 ) are sequentially provided on the second substrate ( 2 ); the first transparent conductive layer ( 6 ) includes first strip-shaped transparent electrodes ( 61 ) and second strip-shaped transparent electrodes ( 62 ) which are alternately provided, and there is a gap between the first strip-shaped transparent electrode ( 61 ) and the second strip-shaped transparent electrode ( 62 ) adjacent to each other; and the second transparent conductive layer ( 4 ) includes third strip-shaped transparent electrodes ( 41 ) provided at intervals. The liquid crystal grating reduces a black stripe.

First claim

The invention claimed is:

1. A liquid crystal grating, comprising a first substrate and a second substrate provided opposite to each other and a liquid crystal layer provided between the first substrate and the second substrate, a plate-shaped transparent electrode being provided on the first substrate, wherein,
a second transparent conductive layer, a transparent insulating layer and a first transparent conductive layer are sequentially provided on the second substrate;
the first transparent conductive layer includes first strip-shaped transparent electrodes and second strip-shaped transparent electrodes which are alternately provided, and a gap is between the first strip-shaped transparent electrode and the second strip-shaped transparent electrode adjacent to each other;
the second transparent conductive layer includes third strip-shaped transparent electrodes provided at intervals; and
only one third strip-shaped transparent electrode with its entirety is provided in an orthographic projection, on the second transparent conductive layer, of a region of every two immediately adjacent first strip-shaped transparent electrodes and one second strip-shaped transparent electrode between the every two immediately adjacent first strip-shaped transparent electrodes;
a first one of the second strip-shaped transparent electrodes is at a first side of a first one of the first strip-shaped transparent electrodes and is immediately adjacent to the first one of the first strip-shaped transparent electrodes, and a second one of the second strip-shaped transparent electrodes is at a second side, which is opposite to the first side, of the first one of the first strip-shaped transparent electrodes and is immediately adjacent to the first one of the first strip-shaped transparent electrodes;
a second one of the first strip-shaped transparent electrodes is at a side, away from the first one of the first strip-shaped transparent electrodes, of the first one of the second strip-shaped transparent electrodes and is immediately adjacent to the first one of the second strip-shaped transparent electrodes, and a third one of the first strip-shaped transparent electrodes is at a side, away from the first one of the first strip-shaped transparent electrodes, of the second one of the second strip-shaped transparent electrodes and is immediately adjacent to the second one of the second strip-shaped transparent electrodes;
a width of each of the first strip-shaped transparent electrodes is greater than a width of each of the second strip-shaped transparent electrodes.

2. The liquid crystal grating according to claim 1 , wherein, an edge of an orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode is within a region of one of the first strip-shaped transparent electrodes, and the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode at most extends to an edge, which is closest to the one of the first strip-shaped transparent electrodes, of a next first strip-shaped transparent electrode next to the one of the first strip-shaped transparent electrodes.

3. The liquid crystal grating according to claim 2 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a position between the one of the first strip-shaped transparent electrodes and the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes.

4. The liquid crystal grating according to claim 2 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a region of the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes.

5. The liquid crystal grating according to claim 2 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a region between the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes and the next first strip-shaped transparent electrode.

6. The liquid crystal grating according to claim 2 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a position of the edge of the next first strip-shaped transparent electrode is provided.

7. The liquid crystal grating according to claim 1 , wherein, an edge of an orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode is provided at a position of an edge of one of the first strip-shaped transparent electrodes, and the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode at most extends to an edge, which is closest to the one of the first strip-shaped transparent electrodes, of a next first strip-shaped transparent electrode next to the one of the first strip-shaped transparent electrodes.

8. The liquid crystal grating according to claim 7 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a position between the one of the first strip-shaped transparent electrodes and the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes.

9. The liquid crystal grating according to claim 7 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a region of the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes.

10. The liquid crystal grating according to claim 7 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a region between the second strip-shaped transparent electrode adjacent to the one of the first strip-shaped transparent electrodes and the next first strip-shaped transparent electrode.

11. The liquid crystal grating according to claim 7 , the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a position of the edge of the next first strip-shaped transparent electrode is provided.

12. The liquid crystal grating according to claim 1 , wherein, a gap is between an edge of an orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode and an edge of one of the first strip-shaped transparent electrodes, and the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode at most extends to an edge, which is closest to the one of the first strip-shaped transparent electrodes, of a next first strip-shaped transparent electrode next to the one of the first strip-shaped transparent electrodes.

13. The liquid crystal grating according to claim 12 , wherein, the other edge of the orthographic projection, on the first transparent conductive layer, of the third strip-shaped transparent electrode extends to a position between the one of the first strip-shaped transparent electrodes and the second strip-shaped transp

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co
• Beijeng Boe Display Tech Co Ltd

Inventors

• Chen Yuqiong

Classifications

• G02B30/31

  involving active parallax barriers (involving directional light or back-light sources G02B30/33) · CPC title

• G02F1/155

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• G02F1/0316

  Electrodes · CPC title

• G02F1/0322

  Arrangements comprising two or more independently controlled crystals · CPC title

• G02F1/13415

  Drop filling process · CPC title