Liquid crystal display panel with embedded touch panel and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9575583-B2
Application number	US-96115310-A
Country	US
Kind code	B2
Filing date	Dec 6, 2010
Priority date	May 27, 2010
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A touch display device includes a display panel, a conductive layer disposed on the display panel, a touch electrode disposed adjacent to the conductive layer and on the display panel, a routing line coupled to the touch electrode, and a polarizer disposed on the touch electrode and the conductive layer, where the conductive layer and the touch electrode are formed of the same material.

First claim

What is claimed is:

1. A touch display device comprising:
a display panel including first and second substrates and a liquid crystal layer between the first and second substrates;
a conductive layer preventing static electricity disposed on an outer surface of the display panel;
a touch electrode layer disposed on an outer surface of the display panel, wherein the touch electrode layer is disposed as a single co-planar layer with the conductive layer occupying a majority portion of the display panel, and the touch electrode layer being disposed between an edge of the display panel and the conductive layer, without any overlap between the touch electrode layer and the conductive layer;
a routing line coupled to the touch electrode layer; and
a polarizer disposed on both the touch electrode layer and the conductive layer, wherein the conductive layer and the touch electrode layer are formed of the same material and are electrically isolated from each other.

2. The device of claim 1 , wherein the conductive layer and the touch electrode layer are transparent.

3. The device of claim 1 , wherein:
the conductive layer, the touch electrode layer and the routing line are formed of the same material, and
the routing line is disposed on the display panel.

4. The device of claim 1 , wherein the routing line is transparent.

5. The device of claim 1 , wherein:
the conductive layer and the touch electrode layer are electrically separated, and the conductive layer is grounded.

6. The device of claim 5 , wherein the conductive layer is grounded via an enclosure of the device.

7. The device of claim 1 , wherein the routing line is coupled to a touch controller.

8. The device of claim 1 , wherein the touch electrode layer includes at least one hole to reduce an initial capacitance of the touch electrode layer.

9. The device of claim 8 , wherein an at least one dummy pattern is disposed within each of the at least one hole.

10. The device of claim 9 , wherein the conductive layer, the touch electrode layer, the routing line and the dummy pattern are formed of the same material.

11. The device of claim 9 , wherein the dummy pattern is electrically isolated from the touch electrode layer.

12. The device of claim 9 , wherein the dummy pattern is a floating pattern to which no voltage is applied.

13. The device of claim 9 , wherein the dummy pattern has a width of about 10˜300 μm.

14. The device of claim 9 , wherein a gap between the dummy pattern and the touch electrode layer is about 10˜30 μm.

Assignees

• Woo Yoon-Hwan
• Na Min-Ho
• Lee Sun-Jung
• Hwang Sang-Soo
• Lg Display Co Ltd

Inventors

• Woo Yoon-Hwan
• Na Min-Ho
• Lee Sun-Jung
• Hwang Sang-Soo

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G02F1/13338

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title