DISPLAY DEVICE

• US 20130307761A1
• Filed: 01/24/2013
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KWAK, Yun Hee, JANG, Jong Woong
• Granted Patent: US 9,626,930 B2
• Time in Patent Office: Days
• US Class Current: 345/87
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

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.

Claims

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; and

a plurality of pixels disposed in the display area;

a first common voltage transmitting line extending 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 extending 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;

a peripheral area around the display area; and

a plurality of pixels disposed in the display area;

a common electrode disposed in substantially an entire of the display area; and

a first common voltage transmitting line extending along at least three edges of the display area, wherein the first common voltage transmitting line transmits a first common voltage to the common electrode through a plurality of first input points which are disposed along the at least three edges.

22. The display device of claim 21, further comprising:

a second common voltage transmitting line which transmits a second common voltage received from an input pad disposed in the peripheral area to the common electrode through a supplementary input point disposed in the display area.

23. The display device of claim 22, further comprising:

a common voltage feedback line which transmits a voltage of the common electrode as a feedback voltage to an output pad disposed in the peripheral area through a feedback output point disposed in the display area.

24. The display device of claim 23, wherein

the common voltage feedback line and the second common voltage transmitting line are disposed in a same layer.

25. The display device of claim 24, wherein

the first common voltage transmitting line is disposed in a same layer as the common voltage feedback line and the second common voltage transmitting line.

26. The display device of claim 25, wherein

the first common voltage transmitting line is divided into at least two portions by a cutout, and

at least one of the common voltage feedback line and the second common voltage transmitting line extends to the display area through the cutout.

27. The display device of claim 24, wherein

the first common voltage transmitting line is disposed in a different layer from at least one of the common voltage feedback line and the second common voltage transmitting line.

28. The display device of claim 24, further comprising:

a protrusion connected to the first common voltage transmitting line and extending into the display area,

wherein the protrusion transmits the first common voltage to the common electrode in the display area through a second input point.

29. The display device of claim 21, further comprising:

a second common voltage transmitting line extending along the first common voltage transmitting line in the peripheral area,

wherein the second common voltage transmitting line transmits a second common voltage, which compensates a deviation of the first common voltage according to a position in the common electrode, to the first common voltage transmitting line.

30. The display device of claim 29, wherein

an input pad of the first common voltage transmitting line is disposed in a first side with respect to a horizontal center line of the display area,

the second common voltage transmitting line is connected to a portion of the first common voltage transmitting line, which is disposed in a second side opposite to the first side with respect to the horizontal center line.