Liquid crystal display pixel structure and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-2016342033-A1
Application number	US-201514423426-A
Country	US
Kind code	A1
Filing date	Feb 6, 2015
Priority date	Nov 17, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

The present invention provides a liquid crystal display pixel structure and a manufacture method thereof. The liquid crystal display pixel structure comprises: a lower substrate ( 1 ), a passivation layer ( 2 ) located on an upper surface of the lower substrate ( 1 ), a pixel electrode ( 3 ) located on the passivation layer ( 2 ), an upper substrate ( 4 ), and a common electrode ( 5 ) located on a lower surface of the upper substrate ( 4 ); each pixel comprises multi domains; in one pixel, the passivation layer ( 2 ) comprises at least two trench structures having different depths, and the pixel electrode uninterruptedly covers on the trench structures, the trench structures having different depths divide the one pixel into different areas to realize that liquid crystals in different areas of the one pixel have different twisted angles under the same driving voltage. The liquid crystal display pixel structure of the present invention is capable of improving the color washout phenomenon under wide view angle, and simplifying the driving control circuit and raising the pixel aperture ratio.

First claim

What is claimed is:

1 . A liquid crystal display pixel structure, comprising: a lower substrate, a passivation layer located on an upper surface of the lower substrate, a pixel electrode located on the passivation layer, an upper substrate, and a common electrode located on a lower surface of the upper substrate; each pixel comprises multi domains; in one pixel, the passivation layer comprises at least two trench structures having different depths, and the pixel electrode uninterruptedly covers on the trench structures, the trench structures having different depths divide the one pixel into different areas to realize that liquid crystals in different areas of the one pixel have different twisted angles under the same driving voltage.

2 . The liquid crystal display pixel structure according to claim 1 , wherein the trench structures comprise a concave part and a convex part adjacent to the concave part, and a depth of the concave part is smaller than or equal to a thickness of the passivation layer.

3 . The liquid crystal display pixel structure according to claim 2 , wherein the depth of the concave part of the trench structures is not fixed, and an optimization adjustment is implemented thereto according to the thickness of the passivation layer and design demands;
a ratio of the different areas in the one pixel is not fixed which is variable and adjusted according to the design demands; a width of the concave part and a width of the adjacent convex part are not fixed which are variable and adjusted according to the design demands.

4 . The liquid crystal display pixel structure according to claim 3 , wherein the trench structures having different depths divide the one pixel into different areas along a horizontal direction and a vertical direction.

5 . The liquid crystal display pixel structure according to claim 3 , wherein the trench structures having different depths divide the one pixel into different areas along a horizontal direction and a vertical direction.

6 . The liquid crystal display pixel structure according to claim 3 , wherein the trench structures having different depths divide the one pixel into different areas along a tilt direction.

7 . The liquid crystal display pixel structure according to claim 1 , wherein the pixel electrode is an ITO electrode, and the common electrode is an ITO electrode.

8 . A manufacture method of a liquid crystal display pixel structure, comprising steps of:
step 1 , providing a lower substrate and deposing a passivation layer on the lower substrate; step 2 , etching the passivation layer with a photo process; in one pixel, the passivation layer is etched to form at least two trench structures having different depths; the trench structures having different depths divide the one pixel into different areas; step 3 , deposing a pixel electrode on the passivation layer comprising the at least two trench structures having different depths to make the pixel electrode uninterruptedly cover on the trench structures; step 4 , providing an upper substrate, and deposing a common electrode on the upper substrate.

9 . The manufacture method of the liquid crystal display pixel structure according to claim 8 , wherein the trench structures comprise a concave part and a convex part adjacent to the concave part, and a depth of the concave part is smaller than or equal to a thickness of the passivation layer.

10 . The manufacture method of the liquid crystal display pixel structure according to claim 9 , wherein the depth of the concave part of the trench structures is not fixed, and an optimization adjustment is implemented thereto according to the thickness of the passivation layer and design demands;
a ratio of the different areas in the one pixel is not fixed which is variable and adjusted according to the design demands; a width of the concave part and a width of the adjacent convex part are not fixed which are variable and adjusted according to the design demands.

11 . A liquid crystal display pixel structure, comprising: a lower substrate, a passivation layer located on an upper surface of the lower substrate, a pixel electrode located on the passivation layer, an upper substrate, and a common electrode located on a lower surface of the upper substrate; each pixel comprises multi domains; in one pixel, the passivation layer comprises at least two trench structures having different depths, and the pixel electrode uninterruptedly covers on the trench structures, the trench structures having different depths divide the one pixel into different areas to realize that liquid crystals in different areas of the one pixel have different twisted angles under the same driving voltage;
wherein the trench structures comprise a concave part and a convex part adjacent to the concave part, and a depth of the concave part is smaller than or equal to a thickness of the passivation layer; wherein the pixel electrode is an ITO electrode, and the common electrode is an ITO electrode.

12 . The liquid crystal display pixel structure according to claim 11 , wherein the depth of the concave part of the trench structures is not fixed, and an optimization adjustment is implemented thereto according to the thickness of the passivation layer and design demands;
a ratio of the different areas in the one pixel is not fixed which is variable and adjusted according to the design demands; a width of the concave part and a width of the adjacent convex part are not fixed which are variable and adjusted according to the design demands.

13 . The liquid crystal display pixel structure according to claim 12 , wherein the trench structures having different depths divide the one pixel into different areas along a diagonal direction of each domain.

14 . The liquid crystal display pixel structure according to claim 12 , wherein the trench structures having different depths divide the one pixel into different areas along a horizontal direction and a vertical direction.

15 . The liquid crystal display pixel structure according to claim 12 , wherein the trench structures having different depths divide the one pixel into different areas along a tilt direction.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Zhao Feng
• Chiu Chungyi

Classifications

• G02F2201/123

  pixel · CPC title

• G02F2001/133397

  Physics · mapped topic

• G02F1/133345 Primary

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title