Display device

Patent metadata

Field	Value
Publication number	US-9626930-B2
Application number	US-201313748845-A
Country	US
Kind code	B2
Filing date	Jan 24, 2013
Priority date	May 16, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A display device includes: a first display panel including: a display area including a first edge, a second edge and a third edge, where the first and second edges are disposed opposite to each other, and the third edge is connected to the first and second edges, a peripheral area around the display area, and a plurality of pixels disposed in the display area; a first common voltage transmitting line extending along the third edge, where the first common voltage transmitting line transmits a first common voltage to the display area through a plurality of input points sequentially disposed along the third edge; and a second common voltage transmitting line extending along the third edge, where the second common voltage transmitting line transmits a second common voltage to the display area through a supplementary input point, which is adjacent to the second edge or the third edge.

First claim

What is claimed is:

1. A display device comprising:
a first display panel comprising:
a display area including a first edge, a second edge and a third edge, wherein the first and second edges are disposed opposite to each other, and the third edge is connected to the first and second edges;
a peripheral area around the display area, the peripheral area defining boundaries of the first display panel; and
a plurality of pixels disposed in the display area;

a first common voltage transmitting line disposed in the peripheral area and extending at least substantially in the peripheral area along the third edge, wherein the first common voltage transmitting line transmits a first common voltage to the display area through a plurality of input points sequentially disposed along the third edge; and
a second common voltage transmitting line disposed in the peripheral area and extending at least substantially in the peripheral area along the third edge, wherein the second common voltage transmitting line transmits a second common voltage to the display area through a supplementary input point, which is adjacent to the second edge or the third edge,
wherein an input pad of the first common voltage transmitting line and an input pad of the second common voltage transmitting line are disposed in the peripheral area adjacent to the first edge and separated from each other, and
the supplementary input point is closer to a last input point of the plurality of input points, which is closest to the second edge, than a first input point of the plurality of input points, which is closest to the first edge.

2. The display device of claim 1 , further comprising:
a common voltage feedback line extending along the third edge, wherein the common voltage feedback line receives a voltage of the last input point or a voltage of an end of the first common voltage transmitting line and transmits the received voltage to an output pad thereof as a feedback voltage.

3. The display device of claim 2 , further comprising:
a signal controller which generates the first common voltage and the second common voltage based on the feedback voltage.

4. The display device of claim 3 , wherein
the common voltage feedback line is connected to an end of the first common voltage transmitting line, which is disposed around the second edge.

5. The display device of claim 4 , wherein
a line width of the second common voltage transmitting line is larger than a line width of the first common voltage transmitting line.

6. The display device of claim 5 , wherein
a pixel of the plurality of pixels comprises:
an insulation substrate;
a common voltage line disposed on the insulation substrate;
a common electrode connected to the common voltage line;
a pixel electrode overlapping the common electrode; and
an insulating layer interposed between the pixel electrode and the common electrode,

wherein the first common voltage transmitting line is connected to at least one of the common voltage line and the common electrode through the plurality of input points.

7. The display device of claim 6 , wherein
the supplementary input point is disposed in the peripheral area adjacent to the third edge, and
the first common voltage transmitting line and the second common voltage transmitting line are connected to each other at the supplementary input point.

8. The display device of claim 6 , wherein
the supplementary input point is substantially arranged with the last input point.

9. The display device of claim 6 , wherein
the second common voltage transmitting line transmits the second common voltage to the display area through a plurality of supplementary input points, which are adjacent to the second edge and arranged along the second edge.

10. The display device of claim 9 , wherein
the common voltage line extends in a direction substantially vertical to the second edge.

11. The display device of claim 1 , wherein
a line width of the second common voltage transmitting line is larger than a line width of the first common voltage transmitting line.

12. The display device of claim 1 , wherein
the supplementary input point is disposed in the peripheral area adjacent to the third edge, and
the first common voltage transmitting line and the second common voltage transmitting line are connected to each other at the supplementary input point.

13. The display device of claim 12 , wherein
the supplementary input point is substantially arranged with the last input point.

14. The display device of claim 1 , wherein
the second common voltage transmitting line transmits the second common voltage to the display area through a plurality of supplementary input points which are adjacent to the second edge and arranged along the second edge.

15. The display device of claim 1 , wherein
a pixel of the plurality of pixels comprises:
an insulation substrate,
a common voltage line disposed on the insulation substrate,
a common electrode connected to the common voltage line;
a pixel electrode overlapping the common electrode; and
an insulating layer interposed between the pixel electrode and the common electrode,
wherein the first common voltage transmitting line is connected to at least one of the common voltage line and the common electrode through the plurality of input points.

16. The display device of claim 15 , wherein
the common voltage line extends in a direction substantially vertical to the second edge.

17. The display device of claim 15 , wherein
the first common voltage transmitting line and the second common voltage transmitting line are disposed in different layers.

18. The display device of claim 17 , further comprising:
a second display panel disposed opposite to the first display panel; and
a liquid crystal layer interposed between the first display panel and the second display panel,
wherein the common electrode is disposed between the pixel electrode and the liquid crystal layer,
the common electrode comprises a plurality of branch electrodes overlapping the pixel electrode, and
the first common voltage transmitting line and the second common voltage transmitting line are connected to each other through a contact assistant disposed in a layer, in which the common electrode is disposed.

19. The display device of claim 17 , further comprising:
a second display panel disposed opposite to the first display panel; and
a liquid crystal layer interposed between the first display panel and the second display panel,
wherein the pixel electrode is disposed between the common electrode and the liquid crystal layer,
the pixel electrode comprises a plurality of branch electrodes overlapping the common electrode, and
the first common voltage transmitting line and the second common voltage transmitting line are connected to each other through a contact assistant disposed in a layer, in which the pixel electrode is disposed.

20. The display device of claim 1 , further comprising:
a plurality of gate lines disposed in the display area; and
a gate driver which transmits gate signals to the plurality of gate lines,
wherein the first common voltage transmitting line and the second common voltage transmitting line are disposed in a different layer from the gate line.

21. A display device comprising:
a first substrate comprising a display area and a peripheral area around the display area;
a plurality of pixel electrodes disposed in the display area;
a common electrode disposed in the displa

Assignees

• Samsung Display Co Ltd

Inventors

• Kwak Yun Hee
• Jang Jong Woong

Classifications

• G02F2201/123

  pixel · CPC title

• G02F2201/121

  common or background · CPC title

• G02F1/136286

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

• G02F1/133345

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

• G09G3/3696 Primary

  Generation of voltages supplied to electrode drivers · CPC title