Display device

• US 10,281,783 B2
• Filed: 01/18/2018
• Issued: 05/07/2019
• Est. Priority Date: 01/20/2017
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Mochizuki, Kazuhide, Tanaka, Hitoshi
• Primary Examiner(s): Picardat, Kevin M
• Application Number:
  US15/874,221
• Publication Number:
  US 20180210299A1
• Time in Patent Office: 474 Days
• Field of Search: None
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2202/10 semiconductor
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/78633 with a light shield
• CPC Class Codes: H01L 29/78693 the semiconducting oxide being amorphous

Abstract

According to one embodiment, a display device including an insulating substrate, a first gate driver, a first gate line and a conductive material layer is provided. The first gate line has a first end connected to the first gate driver and a second end opposite to the first end, and extends in a first direction. The conductive material layer is located between the insulating substrate and the first gate line, overlaps the first gate line, and extends in the first direction. In the display device, the second end of the first gate line is electrically connected to the conductive material layer.

Claims

1. A display device comprising:

an insulating substrate;

a first gate driver;

a first gate line having a first end connected to the first gate driver and a second end opposite to the first end, and extending in a first direction; and

a conductive material layer located between the insulating substrate and the first gate line, overlapping the first gate line, and extending in the first direction, wherein

the second end of the first gate line is electrically connected to the conductive material layer,

the conductive material layer has a third end and a fourth end opposite to the third end,

the third end is electrically connected to either the first gate driver or the first gate line, and

the fourth end is electrically connected to the second end.

2. The display device of claim 1, wherein

the insulating substrate is located over a display area, a first non-display area adjacent to the display area, and a second non-display area adjacent to the display area and opposite to the first non-display area,

the first gate driver is located in the first non-display area, and

the second end is located in the second non-display area.

3. The display device of claim 2, further comprising:

a second gate driver located in the second non-display area; and

a second gate line connected to the second gate driver, wherein

the second end is located between the second gate driver and the display area in the second non-display area.

4. The display device of claim 3, wherein

the second gate line has a fifth end connected to the second gate driver and a sixth end opposite to the fifth end, and

the sixth end is located between the first gate driver and the display area in the first non-display area.

5. The display device of claim 4, further comprising a third relay electrode overlapping the sixth end.

6. The display device of claim 1, wherein a time constant of the first gate line and a time constant of the conductive material layer are different from each other.

7. The display device of claim 1, wherein the conductive material layer is a light-shielding layer.

8. The display device of claim 1, wherein

the insulating substrate is located over a display area, a first non-display area adjacent to the display area, and a second non-display area adjacent to the display area and opposite to the first non-display area,

the first gate driver is located in the first non-display area, and

the fourth end is located in the second non-display area.

9. The display device of claim 8, wherein

a first width of the fourth end in a second direction crossing the first direction is greater than a second width of the conductive material layer in the display area in the second direction.

10. The display device of claim 1, further comprising a first relay electrode which overlaps the fourth end and the second end and contacts the conductive material layer and the first gate line.

11. The display device of claim 10, further comprising:

a first contact portion in which the conductive material layer and the first relay electrode contact each other; and

a second contact portion in which the first gate line and the first relay electrode contact each other, wherein

the first contact portion and the second contact portion are arranged in a second direction crossing the first direction.

12. The display device of claim 10, further comprising a second relay electrode which overlaps the third end and contacts the conductive material layer and the first gate line.

13. The display device of claim 1, further comprising an oxide semiconductor layer which crosses the conductive material layer and the first gate line and is located between the conductive material layer and the first gate line.

14. A display device comprising:

an insulating substrate;

a first gate driver;

a first gate line having a first end connected to the first gate driver and a second end opposite to the first end, and extending in a first direction;

a conductive material layer located between the insulating substrate and the first gate line, overlapping the first gate line, and extending in the first direction;

a first insulating film located on the conductive material layer;

an oxide semiconductor layer located on the first insulating film;

a second insulating film located on the oxide semiconductor layer;

a third insulating film located on the first gate line; and

a first relay electrode overlapping the second end and located on the third insulating film, wherein

the second end of the first gate line is electrically connected to the conductive material layer,

the first gate line is located on the second insulating film,

the first relay electrode contacts the conductive material layer in a first through hole which penetrates the first insulating film, the second insulating film and the third insulating film to the conductive material layer, and contacts the first gate line in a second through hole which penetrates the third insulating film to the first gate line, and

the first through hole and the second through hole are arranged in a second direction crossing the first direction.

15. The display device of claim 14, further comprising:

a source line crossing the first gate line; and

a metal protection film located between the oxide semiconductor layer and the source line and contacting the oxide semiconductor layer and the source line.

16. A display device comprising:

an insulating substrate;

a first gate driver;

a first gate line having a first end connected to the first gate driver and a second end opposite to the first end, and extending in a first direction;

a conductive material layer located between the insulating substrate and the first gate line, overlapping the first gate line, and extending in the first direction;

a first insulating film located on the conductive material layer;

an oxide semiconductor layer located on the first insulating film;

a second insulating film located on the oxide semiconductor layer;

a third insulating film located on the first gate line; and

a first relay electrode overlapping the second end and located on the third insulating film, wherein

the second end of the first gate line is electrically connected to the conductive material layer,

the first gate line is located on the second insulating film, and

the first relay electrode contacts an upper surface of the conductive material and an upper surface and a side surface of the first gate line in a through hole formed in the first insulating film, the second insulating film and the third insulating film.