TOUCH-SENSITIVE LIQUID CRYSTAL DISPLAY DEVICE

• US 20110025969A1
• Filed: 07/27/2010
• Published: 02/03/2011
• Est. Priority Date: 07/31/2009
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: Chi Mei Innolux Corporation (InnoLux Corporation)
• Inventors: LIU, WEN-HSIUNG, CHEN, HSIN-LI
• Granted Patent: US 8,279,361 B2
• Time in Patent Office: Days
• US Class Current: 349/139
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A in-cell touch-sensitive liquid crystal display device (LCD) includes a first substrate, a second substrate opposite to the first substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a first sensing line and a second sensing line disposed on the second substrate, a first conductive layer and a second conductive layer electrically connected to the first sensing line and the second sensing line, respectively, and electrically isolated from each other by a gap existing therebetween. The in-cell touch-sensitive LCD device further includes a spacer disposed on the first substrate and corresponding to the gap. The spacer is electrically connected to the first conductive layer and the second conductive layer in response to an external pressure.

Claims

1. A in-cell touch-sensitive liquid crystal display (LCD) device, comprising:

a first substrate;

a second substrate opposite to the first substrate;

a liquid crystal layer disposed between the first substrate and the second substrate;

a first sensing line and a second sensing line disposed on a surface of the second substrate near the liquid crystal layer;

a first conductive layer and a second conductive layer electrically connected to the first sensing line and the second sensing line, respectively, and the first conductive layer and the second conductive layer electrically isolated from each other by a gap existing therebetween; and

a spacer disposed on the first substrate and corresponding to the gap.

2. The in-cell touch-sensitive LCD device as claimed in claim 1, wherein the first sensing line is a scan line.

3. The in-cell touch-sensitive LCD device as claimed in claim 2, wherein the second substrate further comprises a data line.

4. The in-cell touch-sensitive LCD device as claimed in claim 3, wherein the data line and the second sensing line are made of the same conductive material and co-planar.

5. The in-cell touch-sensitive LCD device as claimed in claim 4, wherein the data line is parallel to and electrically isolated from the second sensing line.

6. The in-cell touch-sensitive LCD device as claimed in claim 5, wherein the first sensing line is perpendicular to the second sensing line.

7. The in-cell touch-sensitive LCD device as claimed in claim 1, wherein the second substrate further comprises a pixel electrode.

8. The in-cell touch-sensitive LCD device as claimed in claim 7, wherein the pixel electrode, the first conductive layer and the second conductive layer are made of the same conductive material.

9. The in-cell touch-sensitive LCD device as claimed in claim 1, further comprising a reading circuit, electrically connected to the second sensing line.

10. The in-cell touch-sensitive LCD device as claimed in claim 1,wherein the first substrate further comprises a common electrode and a third conductive layer, and the common electrode is electrically isolated from the third conductive layer.

11. The in-cell touch-sensitive LCD device as claimed in claim 10, wherein the third conductive layer and the common electrode are made of the same material.

12. The in-cell touch-sensitive LCD device as claimed in claim 10, wherein the spacer is a conductive spacer.

13. The in-cell touch-sensitive LCD device as claimed in claim 12, wherein the third conductive layer and the common electrode are co-planar and the conductive spacer is disposed between the third conductive and the liquid crystal layer.

14. The in-cell touch-sensitive LCD device as claimed in claim 10, wherein the spacer is a photo spacer.

15. The in-cell touch-sensitive LCD device as claimed in claim 14, wherein the third conductive layer is disposed between the photo spacer and the liquid crystal layer.

16. The in-cell touch-sensitive LCD device as claimed in claim 15, wherein a height of the photo spacer is less than a distance from the third conductive layer to the first conductive layer and the second conductive layer.

17. The in-cell touch-sensitive LCD device as claimed in claim 16, wherein the photo spacer moves toward the second substrate in response to a external pressure so as to make the third conductive layer electrically connected to the first conductive layer and the second conductive layer.