LIQUID CRYSTAL DISPLAY

• US 20160202565A1
• Filed: 07/31/2015
• Published: 07/14/2016
• Est. Priority Date: 01/09/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Ho Jun, LEE, Seung Kyu, JEONG, Youn Hak, NAMGUNG, Wan, YOON, Hong Min, KANG, Pil Gyu, LEE, Yun Seok
• Granted Patent: US 10,718,977 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/133726 made of a mesogenic material
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy

Abstract

A liquid crystal display according to an exemplary embodiment of the present system and method includes a first insulation substrate, a thin film transistor disposed on the first insulation substrate, a pixel electrode connected to the thin film transistor, a protrusion disposed on the pixel electrode, a second insulation substrate facing the first insulation substrate, a common electrode disposed on the second insulation substrate, and a liquid crystal layer disposed between the pixel electrode and the common electrode, wherein one pixel includes a thin film transistor formation region where the thin film transistor is disposed and a display area where the pixel electrode is disposed, and the protrusion is disposed to overlay at least a portion of edges of the display area.

Claims

1. A liquid crystal display comprising:

a first insulation substrate,

a thin film transistor disposed on the first insulation substrate,

a pixel electrode connected to the thin film transistor,

a protrusion disposed on the pixel electrode,

a second insulation substrate facing the first insulation substrate,

a common electrode disposed on the second insulation substrate, and

a liquid crystal layer disposed between the pixel electrode and the common electrode,

wherein one pixel includes a thin film transistor formation region where the thin film transistor is disposed and a display area where the pixel electrode is disposed, and

the protrusion is disposed to overlay at least a portion of edges of the display area.

2. The liquid crystal display of claim 1, wherein:

the pixel electrode comprises,

a plurality of cross-shaped stems, and

fine branches obliquely extending from the cross-shaped stems, and

the display area includes a plurality of sub-regions identified by the cross-shaped stems.

3. The liquid crystal display of claim 2, wherein:

the protrusion overlays at least a portion of edges of the sub-regions.

4. The liquid crystal display of claim 3, wherein:

the protrusion includes an opening disposed at corners of the edges.

5. The liquid crystal display of claim 3, wherein:

the protrusion includes an opening disposed at sides of the edges.

6. The liquid crystal display of claim 3, wherein:

the pixel electrode further comprises,

a plate part disposed as the center of the cross-shaped stem.

7. The liquid crystal display of claim 6, wherein:

the plate part has a diamond shape.

8. The liquid crystal display of claim 1,

further comprising a column spacer disposed on the pixel electrode,

wherein the column spacer and the protrusion are disposed in the same layer and are made of the same material.

9. The liquid crystal display of claim 1, wherein:

the protrusion has a height lower than a height of the liquid crystal layer.

10. The liquid crystal display of claim 1, wherein:

the common electrode has a plate shape.

11. The liquid crystal display of claim 1,

further comprising alignment layers disposed on the pixel electrode and the common electrode,

wherein the alignment layers disposed on the pixel electrode further include reactive mesogen (RM).

12. The liquid crystal display of claim 1, wherein:

the liquid crystal layer excludes reactive mesogen (RM).

13. The liquid crystal display of claim 1, wherein:

the liquid crystal display has a curved shape.