Liquid crystal display panel and liquid crystal alignment method thereof

Patent metadata

Field	Value
Publication number	US-10095072-B2
Application number	US-201615232827-A
Country	US
Kind code	B2
Filing date	Aug 10, 2016
Priority date	Aug 21, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A liquid crystal display panel includes first substrate, active switching device, patterned insulating layer, pixel electrode, auxiliary electrode, second substrate, common electrode and liquid crystal molecules. The patterned insulating layer is disposed on the first substrate and includes a plurality of inner insulating branches and slits, and each slit is located between two adjacent inner insulating branches. The pixel electrode is disposed on the patterned insulating layer and electrically connected to the active switching device. The periphery of the pixel electrode overlaps the inner insulating branches. The auxiliary electrode is disposed on the first substrate and at least partially surrounding the pixel electrode. The auxiliary electrode and the pixel electrode are not electrically connected, and the inner insulating branches partially overlap the auxiliary electrode in a vertical projection direction. The common electrode is disposed on the second substrate. The liquid crystal molecules are interposed between the first and second substrates.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising:
a first substrate;
a data line and a gate line disposed on the first substrate;
an active switching device disposed on the first substrate and electrically connected to the data line and the gate line;
a patterned insulating layer disposed on the first substrate, wherein the patterned insulating layer comprises a plurality of inner insulating branches and a plurality of slits, and each of the slits is located between two adjacent inner insulating branches;
a pixel electrode disposed on the patterned insulating layer and electrically connected to the active switching device, wherein a periphery of the pixel electrode overlaps the inner insulating branches;
an auxiliary electrode disposed on the first substrate and at least partially surrounding the pixel electrode, wherein the auxiliary electrode and the pixel electrode are not electrically connected, and the auxiliary electrode partially overlaps the inner insulating branches in a vertical projection direction;
a second substrate disposed to face the first substrate;
a common electrode disposed on the second substrate; and
liquid crystal molecules interposed between the first substrate and the second substrate.

2. The liquid crystal display panel according to claim 1 , further comprising a plurality of alignment regions, wherein the alignment regions comprises a first alignment region, a second alignment region, a third region and a fourth alignment region, the inner insulating branches comprise:
a plurality of first inner insulating branches located in the first alignment region and extending along a first direction;
a plurality of second inner insulating branches located in the second alignment region and extending along a second direction;
a plurality of third inner insulating branches located in the third alignment region and extending along a third direction; and
a plurality of fourth inner insulating branches located in the fourth alignment region and extending along a fourth direction;
wherein the first direction, the second direction, the third direction and the fourth direction, are respectively different directions extending outwardly from a center point of the alignment regions, and the pixel electrode is disposed in the first, the second, the third and the fourth alignment regions.

3. The liquid crystal display panel according to claim 2 , wherein the auxiliary electrode is disposed under the patterned insulating layer, and the pixel electrode is disposed on the patterned insulating layer.

4. The liquid crystal display panel according to claim 3 , wherein the auxiliary electrode partially overlaps the pixel electrode in the vertical projection direction.

5. The liquid crystal display panel according to claim 4 , wherein the inner insulating branches protrude from an outer side of the auxiliary electrode.

6. The liquid crystal display panel according to claim 5 , wherein the inner insulating branches are located within a corresponding outer side of each of the alignment regions, and the pixel electrode has a cross-shaped opening.

7. The liquid crystal display panel according to claim 5 , wherein the inner insulating branches extend from a corresponding outer side of each of the alignment regions to an inner side of each of the alignment regions, and the pixel electrode has a cross-shaped opening.

8. The liquid crystal display panel according to claim 7 , wherein the inner insulating branches are not connected at a corresponding junction of the alignment regions, and the junction of the alignment regions comprises an opening.

9. The liquid crystal display panel according to claim 3 , wherein the inner insulating branches are not protrude from an outer side of the auxiliary electrode.

10. The liquid crystal display panel according to claim 9 , wherein the inner insulating branches extend from a corresponding outer side of each of the alignment regions to an inner side of each of the alignment regions, the inner insulating branches are not connected at a corresponding junction of the alignment regions, the junction of the alignment regions comprises an opening, and the pixel electrode has a cross-shaped opening.

11. The liquid crystal display panel according to claim 9 , wherein the patterned insulating layer further comprises an insulating frame, the insulated frame comprises a multi-frame-shaped pattern, the insulating frame surrounds the inner insulating branches, an end of each of the inner insulating branches is connected to an inner side of the insulating frame, and the insulating frame partially overlaps the auxiliary electrode in the vertical projection direction.

12. The liquid crystal display panel according to claim 3 , wherein the auxiliary electrode does not overlap the pixel electrode in the vertical projection direction.

13. The liquid crystal display panel according to claim 12 , wherein the patterned insulating layer further comprises an insulating frame and an insulating main body, the insulating frame has a multi-frame-shaped pattern, the insulating frame surrounds the inner insulating branches, an end of each of the inner insulating branches is connected to an inner side of the insulating frame, and the insulating frame partially overlaps the auxiliary electrode in the vertical projection direction, and another end of each of the inner insulating branches is connected to the insulating main body.

14. The liquid crystal display panel according to claim 3 , wherein an end of each of the inner insulating branches is connected to an end of another one of the inner insulating branches.

15. The liquid crystal display panel according to claim 2 , wherein the pixel electrode and the auxiliary electrode are disposed on the patterned insulating layer.

16. The liquid crystal display panel according to claim 15 , wherein the auxiliary electrode and the pixel electrode are a same patterned conductive layer.

17. The liquid crystal display panel according to claim 15 , wherein the patterned insulating layer further comprises a plurality of outer insulating branches, and the outer insulating branches comprise:
a plurality of first outer insulating branches located adjacent to an outer side of the first inner insulating branches, wherein a first portion of the first outer insulating branches extends in the second direction, and a second portion of the first outer insulating branches extends in the fourth direction;
a plurality of second outer insulating branches located adjacent to an outer side of the second inner insulating branches, wherein a first portion of the second outer insulating branches extends in the first direction, and a second portion of the second outer insulating branches extends in the third direction;
a plurality of third outer insulating branches located adjacent to an outer side of the third inner insulating branches, wherein a first portion of the third outer insulating branches extends in the second direction, and a second portion of the third outer insulating branches extends in the fourth direction; and
a plurality of fourth outer insulating branches located adjacent to an outer side of the fourth inner insulating branches, wherein a first portion of the fourth outer insulating branches extends in the first direction, and a second portion of the fourth outer insulating branches extends in the third direction.

18. The liquid crystal display panel according to claim 17 , wherein the patterned insulating layer further comprises a plurality of insulating frames, each of the insulating frames is an

Assignees

• Au Optronics Corp

Inventors

• Cheng Wei-Cheng
• Lin Chen-Chun
• Lee Yi-Chi
• Yeh Chao-Wei
• Ting Tien-Lun

Classifications

• G02F1/133753

  with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle · CPC title

• G02F1/133707 Primary

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G02F2001/13775

  Physics · mapped topic

• G02F1/133345

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

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title