LIQUID CRYSTAL DISPLAY PANEL WITH EMBEDDED TOUCH PANEL AND METHOD FOR MANUFACTURING THE SAME

• US 20110291963A1
• Filed: 12/06/2010
• Published: 12/01/2011
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Na, Min-Ho, Lee, Sun-Jung, Woo, Yoon-Hwan, Hwang, Sang-Soo
• Granted Patent: US 9,575,583 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04112 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 Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

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.

Claims

1. A touch display device comprising:

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,

wherein the conductive layer and the touch electrode are formed of the same material.

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

3. The device of claim 1, wherein:

the conductive layer, the touch electrode 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 are electrically separated, and

the conductive layer is grounded.

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

7. The device of claim 1, wherein the touch electrode comprises a hole.

8. The device of claim 7, wherein a dummy pattern is disposed within the hole.

9. The device of claim 8, wherein the conductive layer, the touch electrode, the routing line and the dummy pattern are formed of the same material.

10. The device of claim 8, wherein the dummy pattern is not in contact with the touch electrode.

11. The device of claim 8, wherein the dummy pattern is a floating pattern to which no voltage is applied.

12. The device of claim 8, wherein the dummy pattern has a width of about 10˜

300 μ

m.

13. The device of claim 1, wherein a gap between the dummy pattern and the touch electrode is about 10˜

30 μ

m.

14. The device of claim 1, wherein the display panel is a liquid crystal display panel.

15. A method for manufacturing a touch display device, comprising:

depositing a transparent electrode on a substrate;

patterning the transparent electrode to form a conductive layer, a touch electrode adjacent to the conductive layer and a routing line coupled to the touch electrode; and

disposing a polarizer on the conductive layer, the touch electrode,

wherein the conductive layer is electrically separated from the touch electrode.

16. The method of claim 15, wherein the conductive layer is grounded.

17. The method of claim 15, further comprising coupling the routing line to a touch controller.

18. The method of claim 15, wherein the patterning further comprises patterning a hole in the touch electrode.

19. The method of claim 18, wherein the patterning further comprises patterning a dummy pattern within the hole.