TOUCH PANEL AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

• US 20110141040A1
• Filed: 10/07/2010
• Published: 06/16/2011
• Est. Priority Date: 12/11/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Han, Sung-Su, KANG, Hee-Kwang, An, Su-Chang, Lee, Deuk-Su
• Granted Patent: US 9,092,097 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch panel includes a substrate comprising divided regions; first electrodes, each of the first electrodes comprising first rhombus patterns spaced apart a predetermined distance from each other in a predetermined first direction and first connection patterns configured to connect the first rhombus patterns second electrodes, each of the second electrodes comprising second rhombus patterns spaced apart a predetermined distance from each other in the second direction and second connection patterns configured to connect the second rhombus patterns; third electrodes formed in border areas between the divided regions and outer areas of the divided regions; a touch controller formed in each of the divided regions correspondingly; and pad electrodes connected with the touch controller.

Claims

1. A touch panel comprising:

a substrate comprising a plurality of divided regions;

a plurality of first electrodes, each of the first electrodes comprising first rhombus patterns spaced apart a predetermined distance from each other in a predetermined first direction and first connection patterns configured to connect the first rhombus patterns adjacent on the substrate, the plurality of first electrodes aligned in a second direction crossing the first direction;

a plurality of second electrodes, each of the second electrodes comprising second rhombus patterns spaced apart a predetermined distance from each other in the second direction and second connection patterns configured to connect the second rhombus patterns adjacent, the plurality of second electrodes aligned in the first direction;

a plurality of third electrodes formed in border areas between the divided regions and outer areas of the divided regions, each of the third electrodes formed of triangle patterns connected with each other;

a touch controller formed in each of the divided regions correspondingly; and

a plurality of pad electrodes connected with the touch controller, the pad electrodes formed correspondingly to the first electrodes, the second electrodes and the third electrodes formed in the divided regions of the substrate.

2. The touch panel of claim 1, wherein oblique sides of the triangle patterns of the third electrodes are opposed to the border areas or the outer areas of the divided regions.

3. The touch panel of claim 1, further comprising:

a first routing line connected with one of the pad electrodes from a corner of a first rhombus pattern located in an end of each of the first electrodes aligned in the first direction; and

a second routing line connected with one of the pad electrodes from a corner of a second rhombus pattern located in an end of each of the second electrodes aligned in the second direction.

4. The touch panel of claim 3, further comprising:

a third routing line connected with an end of the third electrodes.

5. The touch panel of claim 4, wherein the third routing line is connected with a vertex of the triangle pattern located in the end of the third electrodes.

6. The touch panel of claim 1, further comprising:

a triangle pattern located in an end of the second electrodes, the triangle pattern adjacent to the outer areas of the divided regions.

7. The touch panel of claim 1, wherein the first connection patterns are integrally formed with the first rhombus patterns;

and

the second connection patterns are metal patterns located in a different layer from the second rhombus patterns.

8. The touch panel of claim 7, wherein the first rhombus patterns and the first connection patterns of the first electrodes, and the second rhombus patterns of the second electrodes are formed of transparent electrodes.

9. The touch panel of claim 1, wherein the first rhombus pattern and the second rhombus pattern have diagonal lines smaller than a critical value of a contact area when touch is generated, respectively.

10. The touch panel of claim 9, wherein the first rhombus pattern and the second rhombus pattern have diagonal lines of 1 cm or less, respectively.

11. The touch panel of claim 1, wherein the touch controller applies voltage signals to the first electrodes and the second electrodes sequentially in the divided region and detects change of voltage values to detect an area having a changed voltage value to be touched.

12. The touch panel of claim 1, wherein the touch controller applies driving voltages to the first electrodes and detects voltage signals from the second electrodes to detect touch and a touch point according to the detected change of the voltage signal.

13. The touch panel of claim 1, wherein the third electrodes are formed in parallel to the first electrodes.

14. The touch panel of claim 13, wherein the third electrodes are configured of triangle patterns spaced apart a predetermined distance from each other in a predetermined first direction in first and second regions adjacent to the border areas, with oblique sides opposed to the border areas and connection patterns integrally formed with each other to connect the triangle patterns with each other.

15. The touch panel of claim 13, wherein in case the substrate is divided into first to four regions, each of the third electrodes comprises first triangle patterns spaced apart a predetermined distance from each other, with oblique sides opposed to the border areas in the first direction, and connection patterns integrally formed with each other to connect the first triangle patterns adjacent, in neighboring border and the outer areas in the first direction;

and

wherein each of the third electrodes comprises a right-triangle pattern having a right included-angle with respect to the first to fourth regions to be connected with the first triangle patterns, in a center of the border areas of the first to fourth regions.

16. The touch panel of claim 15, further comprising:

a second triangle-pattern connected with an end of the second rhombus pattern of each of the second electrodes in the border area of the second direction, with an oblique side opposed to the border and outer areas.

17. A liquid crystal display device comprising:

a liquid crystal panel comprising first and second substrates opposed to each other, with a liquid crystal layer filled between the first and second substrates;

a substrate comprising a plurality of divided regions;

a plurality of first electrodes, each of the first electrodes comprising first rhombus patterns spaced apart a predetermined distance from each other in a predetermined first direction and first connection patterns configured to connect the first rhombus patterns adjacent, the plurality of first electrodes aligned in a second direction crossing the first direction on a rear surface of the second substrate;

a plurality of second electrodes, each of the second electrodes comprising second rhombus patterns spaced apart a predetermined distance from each other in the second direction and second connection patterns configured to connect the second rhombus patterns adjacent, the plurality of second electrodes aligned in the first direction on the rear surface of the second substrate;

a plurality of third electrodes formed in border areas between the divided regions and outer areas of the divided regions, each of the third electrodes formed of triangle patterns connected with each other;

a touch controller formed in each of the divided regions correspondingly; and

a plurality of pad electrodes connected with the touch controller, the pad electrodes formed correspondingly to the first electrodes, the second electrodes and the third electrodes formed in the divided regions of the substrate.