IP Library Granted Patent US 6,897,930
Granted Patent B2
US 6,897,930 · App. 10/347,328 · Granted May 24, 2005

Display device

Assignee: Hitachi, Ltd.
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Quick Facts
Patent No.
US 6,897,930
App. No.
10/347,328
Granted
May 24, 2005
Kind
B2
Abstract

In order to suppress open-circuit of drain signal lines, a liquid display device is disclosed, which includes a first gate signal line and a second gate signal line, a first drain signal line and a second drain signal line, a first pixel region comprising a first thin film transistor connected to the first gate signal line and the first drain signal line, a second pixel region comprising a second thin film transistor connected to the first gate signal line and the second drain signal line, a third pixel region comprising a third thin film transistor connected to the second gate line and the first pixel region, the second pixel region and the third pixel region form one dot of color display and the first drain signal line and the second drain signal line are curved at a first angle between the first gate signal line and the second gate signal line.

Claims (34)

1. A display device comprising:

a first gate signal line and a second gate signal line;

a first drain signal line and a second drain signal line;

a first pixel region comprising a first thin film transistor connected to the first gate signal line and the first drain signal line; and

a second pixel region comprising a second thin film transistor connected to the second gate signal line and the first drain signal line; and

wherein the first drain signal line is curved at a first angle at a center portion of the first drain signal line in the first pixel region and is curved at a second angle at a center portion of the first drain signal line in the second pixel region, the first angle and the second angle being inversed angles with respect to one another.

2. A display device according to claim 1 , wherein the first angle and the second angle are equal angles.

3. A display device according to claim 1 , wherein the first pixel region and the second pixel region are displayed in different colors.

4. A display device according to claim 3 , further comprising a third pixel region with a third thin film transistor connect to the second gate signal line and the second drain signal line, the second drain signal line extending in parallel to the first drain signal line.

5. A display device according to claim 4 , wherein the first pixel region, the second pixel region, and the third pixel region form one dot of color display.

6. A display device according to claim 5 , wherein the first angle is an obtuse angle and the second angle is an obtuse angle.

7. A display device according to claim 6 , wherein the first drain signal line and the second drain signal line include straight line shape portions which cross the second gate line.

8. A display device according to claim 7 , wherein the first drain signal line and the second drain signal line include straight line shape portions which cross the first gate line.

9. A display device according to claim 1 , wherein first pixel electrode in the first pixel region and second pixel electrode in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

10. A display device according to claim 9 , wherein a first counter electrode in the first pixel region and a second counter electrode in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

11. A display device according to claim 1 , wherein a first edge of a color filter in the first pixel region and a second edge of a color filter in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

12. A display device according to claim 11 , wherein a first edge of a black matrix in the first pixel region and a second edge of a black matrix in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

13. A display device comprising:

a first gate signal line and a second gate signal line;

a first drain signal line and a second drain signal line;

a first pixel region comprising a first thin film transistor connected to the first gate signal line and the first drain signal line;

a second pixel region comprising a second thin film transistor connected to the second gate signal line and the first drain signal line;

wherein the first drain signal line is curved only once at a first angle in the first pixel region and is curved only once at a second angle in the second pixel region, the first angle and the second angle being inversed angles with respect to one another.

14. A display device according to claim 13 , wherein the first angle and the second angle are equal angles.

15. A display device according to claim 13 , wherein the first pixel region and the second pixel region are displayed in different colors.

16. A display device according to claim 15 , further comprising a third pixel region with a third thin film transistor connect to the second gate signal line and the second drain signal line, the second drain signal line extending in parallel to the first drain signal line.

17. A display device according to claim 16 , wherein the first pixel region, the second pixel region, and the third pixel region form one dot of color display.

18. A display device according to claim 17 , wherein the first angle is an obtuse angle and the second angle is an obtuse angle.

19. A display device according to claim 18 , wherein the first drain signal line and the second drain signal line include straight line shape portions which cross the second gate line.

20. A display device according to claim 19 , wherein the first drain signal line and the second drain signal line include straight line shape portions which cross the first gate line.

21. A display device according to claim 13 , wherein first pixel electrode in the first pixel region and second pixel electrode in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

22. A display device according to claim 21 , wherein a first counter electrode in the first pixel region and a second counter electrode in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

23. A display device according to claim 13 , wherein a first edge of a color filter in the first pixel region and a second edge of a color filter in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

24. A display device according to claim 23 , wherein a first edge of a black matrix in the first pixel region and a second edge of a black matrix in the second pixel region are elongated in a direction which is parallel to an extension direction of the first drain line.

Assignments (4)
COMPANY SPLIT PLAN TRANSFERRING FIFTY (50) PERCENT SHARE OF PATENTS AND PATENT APPLICATIONS Recorded Dec 12, 2011
From: HITACHI DISPLAYS, LTD.
To: IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027362/0466 →
COMPANY SPLIT PLAN TRANSFERRING ONE HUNDRED (100) PERCENT SHARE OF PATENT AND PATENT APPLICATIONS Recorded Dec 12, 2011
From: HITACHI, LTD.
To: HITACHI DISPLAYS, LTD.
Reel/Frame 027362/0612 →
MERGER/CHANGE OF NAME Recorded Dec 12, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027363/0315 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 12, 2003
From: NAKAYOSHI, YOSHIAKI; YANAGAWA, KAZUHIKO
To: HITACHI, LTD.
Reel/Frame 013847/0983 →
Priority Claims (1)
JP 2002-012927 · Jan 22, 2002 · national
Continuity (1)
Related Publication 20030137615A1 · Jul 24, 2003