TFT-driven display device

Patent metadata

Field	Value
Publication number	US-9508744-B2
Application number	US-201314083350-A
Country	US
Kind code	B2
Filing date	Nov 18, 2013
Priority date	Jun 24, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A TFT-driven display device includes an upper substrate and a lower substrate facing each other, multiple TFTs disposed on a side of the lower substrate facing the upper substrate, and a metal layer disposed on a side of the upper substrate facing the lower substrate. The metal layer includes multiple horizontal metal wirings extending in a direction of scanning lines and including portions overlapping with an active layer of the TFTs in the light transmission direction, the overlapping portions have a pattern width less than that of other portions that do not overlap with the active layer. A photo-leakage current caused by light reflected by the metal layer may be reduced, because no portion of the metal layer is provided in the position opposed to the active layer of the TFTs located on a TFT array substrate.

First claim

What is claimed is:

1. A Thin Film Transistor-driven display device, comprising: an upper substrate; a lower substrate; a plurality of Thin Film Transistors (TFTs) disposed on a side of the lower substrate facing to the upper substrate, each having a width; and a plurality of metal wires disposed on a side of the upper substrate facing the lower substrate, wherein each of the metal wires is associated with and partially overlaps with a different one of active layers of the plurality of TFTs in a light transmission direction; wherein the overlapping part of each metal wire is at least partially located in a first non-reflective region of each of the metal wires, blocked from a backlight incident on the metal wires by the active layer of the TFT in the light transmission direction, and wherein a shortest distance from an edge of a projection of the first non-reflective region onto the active layer to an edge of the active layer is greater than or equal to a vertical distance from the active layer to the metal wires.

2. The TFT-driven display device according to claim 1 , wherein the overlapping part of each metal wire with the active layer of the TFTs in the light transmission direction has a line width of 5 μm or less.

3. The TFT-driven display device according to claim 1 , wherein the non-overlapping part of each metal wire is located in a second non-reflective region non-overlapping with the active layer in the light transmission direction, and a shortest distance from an edge of the second non-reflective region to an edge of a projection of the active layer onto the metal wires is greater than or equal to a vertical distance from the active layer to the metal wires.

4. The TFT-driven display device according to claim 1 , wherein the metal wires are arranged in a touch-control structure provided on the side of the upper substrate facing the lower substrate.

5. The TFT-driven display device according to claim 4 , wherein the touch-control structure comprises a first conductive layer and a second conductive layer, an insulating layer disposed between the first conductive layer and the second conductive layer, and the second conductive layer is provided on a side of the touch-control structure closer to the active layer.

6. The TFT-driven display device according to claim 5 , wherein the second conductive layer comprises the metal wires.

7. The TFT-driven display device according to claim 6 , wherein the second conductive layer comprises bridges, and overlapping portions of the second conductive layer located at the bridges with the active layer of the TFTs in the light transmission direction have a pattern width less than a pattern width of other portions of the second conductive layer.

8. The TFT-driven display device according to claim 7 , wherein the second conductive layer located at the bridges is at least partially located in the first non-reflective region, or the second conductive layer located at the bridges is at least partially located in the second non-reflective region.

9. The TFT-driven display device according to claim 6 , wherein the second conductive layer comprises touch-control electrodes, and overlapping portions of the second conductive layer located at the touch-control electrodes with the active layer of the TFTs in the light transmission direction have a pattern width less than a pattern width of other portions of the second conductive layer.

10. The TFT-driven display device according to claim 9 , wherein the second conductive layer located at the touch-control electrodes is at least partially located in the first non-reflective region, or the second conductive layer located at the touch-control electrodes is at least partially located in the second non-reflective regions.

11. The TFT-driven display device according to claim 5 , wherein the first conductive layer comprises the metal wires.

12. The TFT-driven display device according to claim 11 , wherein the first conductive layer comprises bridges, and overlapping portions of the first conductive layer located at the bridges with the active layer of the TFTs in the light transmission direction have a pattern width less than that of other portions of the first conductive layer.

13. The TFT-driven display device according to claim 12 , wherein the bridges are at least partially located in the first non-reflective region, or the bridges are at least partially located in the second non-reflective regions.

14. The TFT-driven display device according to claim 11 , wherein the first conductive layer comprises touch-control electrodes, and overlapping portions of the first conductive layer located at the touch-control electrodes with the active layer of the TFTs in the light transmission direction have a pattern width less than that of other portions of the first conductive layer.

15. The TFT-driven display device according to claim 14 , wherein the touch-control electrodes are at least partially located in the first non-reflective region, or the touch-control electrodes are at least partially located in the second non reflective region.

Assignees

• Shanghai Tianma Microelectronics Co Ltd
• Tianma Microelectronics Co Ltd

Inventors

• Zhou Xingyao
• Yao Qijun
• Ma Jun
• Wang Wei

Classifications

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• H10D86/421

  having a particular composition, shape or crystalline structure of the active layer · CPC title

• H10D86/60 Primary

  wherein the TFTs are in active matrices · CPC title