Display device

Patent metadata

Field	Value
Publication number	US-9921448-B2
Application number	US-201715425034-A
Country	US
Kind code	B2
Filing date	Feb 6, 2017
Priority date	May 25, 2016
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A display device capable of significantly reducing variation of a capacitance formed by a pixel electrode and a data line, the display device including: a first gate line; first and second data lines intersecting the first gate line; a pixel electrode adjacent to the second data line; a switching element connected to the first gate line, the first data line, and the pixel electrode; and a first extension portion extending from the pixel electrode and intersecting the second data line.

First claim

What is claimed is:

1. A display device, comprising:
a first gate line;
first and second data lines intersecting the first gate line;
a pixel electrode adjacent to the second data line;
a switching element connected to the first gate line, the first data line, and the pixel electrode;
a first extension portion extending from the pixel electrode in a first direction and intersecting the second data line; and
a second extension portion extending from the first extension portion in a second direction perpendicular to the first direction.

2. The display device as claimed in claim 1 , wherein the second extension portion is spaced apart from the second data line.

3. The display device as claimed in claim 2 , wherein a first side of the second data line faces the second extension portion.

4. The display device as claimed in claim 3 , wherein a second side of the second data line faces the pixel electrode.

5. The display device as claimed in claim 2 , further comprising:
a connection electrode connecting the pixel electrode and the switching element; and
a third extension portion extending from the connection electrode and overlapping the first data line.

6. The display device as claimed in claim 5 , wherein the third extension portion has a width greater than a width of the first data line.

7. The display device as claimed in claim 5 , wherein a sum of a capacitance of a first capacitor formed by the pixel electrode and the second data line and a capacitance of a second capacitor formed by the second data line and the second extension portion is substantially equal to a capacitance of a third capacitor formed by the first data line and the third extension portion.

8. The display device as claimed in claim 5 , wherein the pixel electrode, the connection electrode, the first extension portion, the second extension portion, and the third extension portion are integrally formed as a single structure.

9. The display device as claimed in claim 2 , wherein, at an intersecting portion between the second data line and the first extension portion, at least one of the second data line and the first extension portion has a width less than a width of another portion of the at least one of the second data line and the first extension portion.

10. The display device as claimed in claim 2 , wherein a distance between the pixel electrode and the second data line is the same as a distance between the second data line and the second extension portion.

11. The display device as claimed in claim 2 , wherein a distance between the pixel electrode and the second data line is different from a distance between the second data line and the second extension portion.

12. The display device as claimed in claim 11 , wherein the distance between the pixel electrode and the second data line is greater than the distance between the second data line and the second extension portion.

13. The display device as claimed in claim 11 , wherein the distance between the pixel electrode and the second data line is less than the distance between the second data line and the second extension portion.

14. The display device as claimed in claim 1 , further comprising:
a connection electrode connecting the pixel electrode and the switching element; and
a second gate line overlapping the connection electrode.

15. The display device as claimed in claim 14 , wherein, in one frame period, the second gate line is driven before the first gate line is driven.

16. The display device as claimed in claim 14 , wherein the pixel electrode is disposed in an area defined by the first gate line, the second gate line, the first data line, and the second data line.

17. The display device as claimed in claim 16 , wherein:
the pixel electrode comprises:
a plurality of planar electrodes connected to each other in a row between the first and second gate lines; and
a plurality of branch electrodes extending from each of the planar electrodes; and

the first extension portion extends from one of the planar electrodes or the branch electrodes.

18. The display device as claimed in claim 17 , further comprising a common electrode overlapping the pixel electrode, wherein the common electrode comprises a plurality of holes, each corresponding to one of the planar electrodes.

19. The display device as claimed in claim 18 , wherein each of the holes has a cross shape.

20. The display device as claimed in claim 19 , wherein:
each of the planar electrodes comprises four sides, and a central portion of each of the holes comprises four inner walls; and
each of the inner walls is substantially parallel to one of the sides of the planar electrodes.

21. The display device as claimed in claim 1 , wherein:
the pixel electrode comprises a planar electrode and a branch electrode extending from the planar electrode, and
the first extension portion extends from one of the planar electrode and the branch electrode.

22. The display device as claimed in claim 21 , further comprising a common electrode overlapping the pixel electrode, the common electrode comprising a hole corresponding to the planar electrode.

23. The display device as claimed in claim 22 , wherein:
the planar electrode comprises four sides, and a central portion of the hole comprises four inner walls; and
each of the inner walls is substantially parallel to one of the sides of the planar electrode.

24. The display device as claimed in claim 1 , wherein a first side of the pixel electrode facing the first gate line has a length greater than a length of a second side of the pixel electrode facing the second data line.

25. The display device as claimed in claim 1 , further comprising a common electrode overlapping the pixel electrode.

26. The display device as claimed in claim 25 , wherein the common electrode comprises a hole corresponding to the pixel electrode.

27. The display device as claimed in claim 26 , wherein the hole has a cross shape.

Assignees

• Samsung Display Co Ltd

Inventors

• Mok Seonkyoon
• Lee Seongyoung
• Park Kiwon
• Park Hyungjun
• Jang Hwanyoung
• Na Byoungsun

Classifications

• G02F2201/121

  common or background · CPC title

• G02F1/136213

  Storage capacitors associated with the pixel electrode · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/133528

  Polarisers · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title