Matrix-type display capable of being repaired by pixel unit and a repair method therefor

• US 20040001176A1
• Filed: 07/28/2003
• Published: 01/01/2004
• Est. Priority Date: 11/01/1995
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Dong-Gyu Kim, Jung-Hee Lee, Kyung-Nam Lee, Kyung-Seop Kim, Shi-Yual Kim, Woon-Yong Park
• Inventors: Park, Woon-yong, Kim, Dong-gyu, Lee, Jung-hee, Lee, Kyung-nam, Kim, Kyung-seop, Kim, Shi-yual
• Granted Patent: US 6,888,589 B2
• Time in Patent Office: Days
• US Class Current: 349/139
• CPC Class Codes: G02F 1/1309 Repairing; Testing
• CPC Class Codes: G02F 1/136259 Repairing; Defects
• CPC Class Codes: G02F 1/136263 Line defects
• CPC Class Codes: G02F 1/136268 Switch defects
• CPC Class Codes: G02F 1/136272 Auxiliary lines
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line

Abstract

A matrix-type display capable of being repaired by pixel unit, Two or more of signal lines such as scanning lines, image signal lines and auxiliary signal lines and a pixel electrode are overlapped via an insulating layer, so that a defect such as the disconnection of the image signal lines and scanning lines, the short of the pixel electrode and the signal line, and the loss of electrode of a switching element, and a pixel defect can be repaired. Here, the layout of the auxiliary gate line and dual gate line can be modified.

Claims

1. A matrix-type display having a plurality of pixel regions arranged in a matrix-type, comprising:

an upper first signal line and a lower first signal line formed in a horizontal direction, the upper and the lower first signal lines serving as an upper and a lower boundaries of each pixel region respectively;

a second signal line formed in a vertical direction between pixel regions, the second signal line crossing the upper and the lower first signal lines and being insulated from the upper and the lower first signal lines;

an auxiliary signal line formed adjacent to the second signal line, wherein the auxiliary signal lines serves as a left or a right boundary of the each pixel region, and the upper and the lower gate lines and the auxiliary signal line have at least three cross points with the second signal line together;

a transparent pixel electrode, formed in each pixel region; and

a switching element having a first terminal connected to the upper or the lower first signal line, a second terminal connected to the pixel electrode, and a third terminal connected to the second signal line.

2. The matrix-type display as claimed in claim 1, wherein the auxiliary signal line is connected to the upper or the lower first signal lines.

3. The matrix-type display as claimed in claim 1, wherein the auxiliary signal line is overlapped with the pixel electrode to serve as a storage electrode.

4. The matrix-type display as claimed in claim 1, further comprising an isolated connecting member overlapped with the upper first signal line in a pixel region and the lower first signal line in the upper pixel region.

5. The matrix-type display as claimed in claim 1, further comprising an isolated connecting means overlapped with the auxiliary signal line in a pixel region and the auxiliary signal line of the upper pixel region.

6. The matrix-type display as claimed in claim 1, wherein the auxiliary signal line is made of an opaque metal to shield a periphery of the pixel electrode as a black matrix.

7. A method for repairing an open of a data line in a matrix-type display having a plurality of pixel regions, the matrix-type display including a gate line formed in a horizontal direction to serving as a boundary of each pixel region, for transmitting a gate signal;

a data line formed in a vertical direction between the pixel regions, the data line crossing the gate line with being insulated from the gate line, for transmitting a data signal;

a transparent pixel electrode formed in each pixel region;

a switching element having a first terminal connected to the gate line, a second terminal connected to the date line, and a third terminal connected to the pixel electrode; and

an auxiliary gate line, formed adjacent to the data line, of a branch of the gate line, wherein the gate line and the auxiliary gate line together have at least two cross points with the data line, the method comprising the steps of;

short-circuiting the gate line or the auxiliary gate line with the data line at the cross points adjacent to an open point of the data line;

separating the auxiliary gate line from the gate line, so that the auxiliary gate line serves as a bypass of the open point.

8. The method as claimed in claim 7, wherein the gate line comprises two parts serving as an upper and an lower boundaries of each pixel region.

9. The method as claimed in claim 7, wherein the auxiliary gate line is overlapped with the pixel electrode to be used as an storage electrode.

10. A method for repairing a disconnection of a data line in a matrix-type display having a plurality of pixel regions, the matrix-type display including a gate line formed in a horizontal direction to serving as a boundary of each pixel region, for transmitting a gate signal;

a data line formed in a vertical direction between the pixel regions, the data line crossing the gate line with being insulated from the gate line, for transmitting a data signal;

a transparent pixel electrode formed in each pixel region;

a switching element having a first terminal connected to the gate line, a second terminal connected to the date line, and a third terminal connected to the pixel electrode; and

a storage electrode overlapped with the pixel electrode, wherein the storage electrode has at least two cross points with the data line, the method comprising the steps of;

isolating the storage electrode adjacent to an open point of the data line; and

short-circuiting the isolated storage electrode with the data line at the cross points adjacent to the open-point.

11. A method for repairing a pixel defect in a matrix-type display having a plurality of pixel regions, the matrix-type display including a gate line formed in a horizontal direction to serving as a boundary of each pixel region, for transmitting a gate signal;

a data line formed in a vertical direction between the pixel regions, the data line crossing the gate line with being insulated from the gate line, for transmitting a data signal;

a transparent pixel electrode formed in each pixel region;

a switching element having a first terminal connected to the gate line, a second terminal connected to the date line, and a third terminal connected to the pixel electrode; and

an auxiliary gate line connected to the gate line and overlapped with the pixel electrode, the method comprising the step of;

short-circuiting the pixel electrode with the auxiliary gate line so that the pixel electrode is supplied with a gate signal.

12. A method for repairing a pixel defect in a matrix-type display having a plurality of pixel regions, the matrix-type display including a gate line formed in a horizontal direction to serving as a boundary of each pixel region, for transmitting a gate signal;

a data line formed in a vertical direction between the pixel regions, the data line crossing the gate line with being insulated from the gate line, for transmitting a data signal;

a transparent pixel electrode formed in each pixel region;

a switching element having a first terminal connected to the gate line, a second terminal connected to the date line, and a third terminal connected to the pixel electrode; and

a first connecting member overlapped with the pixel electrode and the data line, the method comprising the steps of;

connecting the pixel electrode with the first connecting member at the overlapped point of the pixel electrode and the first connecting member; and

connecting the first connecting member with the data line, so that the pixel electrode is supplied with a data signal.

13. The method as claimed in claim 12, wherein the first connecting member is made of opaque material to serve as a black matrix.

14. The method as claimed in claim 12, wherein the first connecting member is an electrode of a storage capacitor and the other electrode of the storage capacitor is the pixel electrode.

15. The method as claimed in claim 12, further comprises the step of separating the gate line when the. first connecting member is connected to the gate line.

16. The method as claimed in claim 15, wherein the first connecting member is made of aluminum and the pixel electrode is made of indium-tin-oxide.

17. The method as claimed in claim 16, wherein the matrix-type display further comprises a second connecting member, made of the data line material, overlapped with the first connecting member and the pixel electrode, and the step of connecting the pixel electrode with the connecting member comprises the steps of:

short-circuiting the first connecting member and the second connecting member; and

short-circuiting the second connecting member and the pixel electrode.

18. The method as claimed in claim 17, the overlapped point of the first connecting member and the second connecting member is the same as that of the second connecting member and the pixel electrode.