Liquid crystal display including curved shield electrode

Patent metadata

Field	Value
Publication number	US-9563093-B2
Application number	US-201414530934-A
Country	US
Kind code	B2
Filing date	Nov 3, 2014
Priority date	May 8, 2014
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A liquid crystal display includes a lower substrate and an upper substrate facing each other, a liquid crystal layer provided between the lower substrate and the upper substrate, a plurality of pixel electrodes provided on the lower substrate, extended in a substantially horizontal direction, and including a thin film transistor forming region and a display area, a reference voltage line extended in a substantially vertical direction along a center of the display area, a gate line provided on the lower substrate and extended in the substantially horizontal direction between neighboring pixel electrodes of the plurality of pixel electrodes, a data line provided on the lower substrate and crossing the gate line, and a shield electrode overlapping the gate line and including a curved portion which is disposed on an edge portion of the pixel electrode and overlaps the data line.

First claim

What is claimed is:

1. A liquid crystal display comprising:
a lower substrate and an upper substrate facing each other;
a liquid crystal layer provided between the lower substrate and the upper substrate;
a plurality of pixel electrodes provided on the lower substrate, extended in a substantially horizontal direction, and including a thin film transistor forming region and a display area;
a reference voltage line extended in a substantially vertical direction along a center of the display area;
a gate line provided on the lower substrate and extended in the substantially horizontal direction between neighboring pixel electrodes of the plurality of pixel electrodes;
a data line provided on the lower substrate and crossing the gate line; and
a shield electrode overlapping the gate line and including a curved portion which is disposed on an edge portion of the pixel electrode and overlaps the data line,
wherein the shield electrode has different thicknesses along the vertical direction.

2. The liquid crystal display of claim 1 , wherein
the shield electrode is separated from the plurality of pixel electrodes.

3. The liquid crystal display of claim 1 , wherein
the reference voltage line includes a branch extended in the thin film transistor forming region along an outer side of the display area.

4. The liquid crystal display of claim 3 , further comprising:
a contact hole defined between the branch and the shield electrode, and connecting the branch and the shield electrode.

5. The liquid crystal display of claim 1 , wherein
the plurality of pixel electrodes includes a first sub-pixel region and a second sub-pixel region respectively arranged in two rows.

6. The liquid crystal display of claim 5 , wherein
each of the first sub-pixel region and the second sub-pixel region includes six domains.

7. The liquid crystal display of claim 6 , wherein
the reference voltage line crosses centers of the first sub-pixel region and the second sub-pixel region.

8. The liquid crystal display of claim 7 , wherein
each of the first sub-pixel region and the second sub-pixel region includes a plurality of unit electrodes connected to each other.

9. The liquid crystal display of claim 8 , wherein
a unit electrode of the plurality of unit electrodes includes a center electrode having a plate-shaped configuration and a plurality of minute branches extended from a side of the center electrode.

10. The liquid crystal display of claim 8 , wherein
an area of a unit electrode of the plurality of unit electrodes of the second sub-pixel region is equal to or greater than an area of a unit electrode of the plurality of unit electrodes of the first sub-pixel region.

11. The liquid crystal display of claim 5 , wherein
a voltage applied to the second sub-pixel region is less than a voltage applied to the first sub-pixel region.

12. The liquid crystal display of claim 5 , wherein
the plurality of pixel electrodes further includes a first sub-pixel electrode and a second sub-pixel electrode, and
the thin film transistor forming region includes:
a first thin film transistor connected to the first sub-pixel electrode of the plurality of pixel electrodes of the first sub-pixel region;
a second thin film transistor connected to the second sub-pixel electrode of the plurality of pixel electrodes of the second sub-pixel region; and
a third thin film transistor connected to the reference voltage line.

13. The liquid crystal display of claim 1 , wherein
an upper common electrode is provided on the upper substrate.

14. The liquid crystal display of claim 13 , wherein
a horizontal opening, a perpendicular opening crossing the horizontal opening, and a cross opening configured with the horizontal opening and the perpendicular opening are defined in the upper common electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Chang Hak Sun
• Kim Ka Eun
• Ryu Jang Wi
• Shin Ki Chul

Classifications

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title

• G02F1/13624

  having more than one switching element per pixel · CPC title

• G02F1/1362 Primary

  Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/1368

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