Touch screen system and display device using the same

• US 20040095334A1
• Filed: 11/06/2003
• Published: 05/20/2004
• Est. Priority Date: 11/18/2002
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Hong, Hee Jung
• Granted Patent: US 7,253,808 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: H05K 2201/09172 Notches between edge pads
• CPC Class Codes: H05K 2201/10992 Using different connection materials, e.g. different solders, for the same connection
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits
• CPC Class Codes: H05K 3/403 Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof H05K3/4092 takes precedence

Abstract

A touch screen system includes a touch panel to input image signals, a touch controller to drive the touch panel, an extension between the touch panel and the touch controller, and an anisotropic conductive film electrically interconnecting the extension to the touch controller.

Claims

1. A touch screen system, comprising:

a touch panel to input image signals;

a touch controller to drive the touch panel;

an extension between the touch panel and the touch controller; and

an anisotropic conductive film electrically interconnecting the extension to the touch controller.

2. The system according to claim 1, wherein the touch controller is mounted on a printed circuit board and includes a plurality of connection pads corresponding to a plurality of signal lines formed on the extension.

3. The system according to claim 2, wherein the printed circuit board includes a fixing guide disposed around the connection pads and contacting side portions of the anisotropic conductive film.

4. The system according to claim 2, further comprising a liquid crystal module integrated with the touch panel system, wherein the connection pads of the touch controller are mounted on the printed circuit board.

5. The system according to claim 4, wherein the printed circuit board is disposed at a rear surface of the liquid crystal module.

6. A touch screen system, comprising:

a touch panel to input image signals;

a touch controller to drive the touch panel; and

an extension having a plurality of signal lines to transmit electrical signals between the touch panel and the touch controller,

wherein the extension includes a plurality of end portions that correspond to a total number of the signal lines connected to the touch controller.

7. The system according to claim 6, wherein each end portion includes one of the signal lines that extends from an upper surface to a lower surface of the end portion.

8. The system according to claim 6, wherein the touch controller has a plurality of connection pads aligned with the signal lines.

9. The system according to claim 8, wherein the connection pads are connected to the signal lines by soldering.

10. The system according to claim 8, wherein the connection pads are connected to the signal lines by an anisotropic conductive film.

11. A touch screen system, comprising:

a touch panel having a plurality of electrodes;

a touch controller having a plurality of contact pads; and

an extension having a first portion physically connected to an end region of the touch panel, a second portion electrically connected to the touch controller, and a third portion disposed between the first and second portions,

wherein the second portion of the extension includes a plurality of individual end portions electrically connected to the plurality of contact pads.

12. The system according to claim 11, wherein the touch controller is mounted on a printed circuit board.

13. The system according to claim 12, wherein each of the plurality of individual end portions includes an anisotropic conductive film extending along upper and lower surfaces of the individual end portions.

14. The system according to claim 13, wherein the anisotropic conductive film extends along upper surfaces of the first and third portions of the extension.

15. The system according to claim 14, wherein a width of the first portion of the extension is larger than a width of the third portion of the extension.

16. The system according to claim 13, wherein the anisotropic conductive film on the lower surface of the individual end portion is connected to one of the connection pads using solder

17. The system according to claim 12, wherein the connection pads of the touch controller are mounted on the printed circuit board.

18. The system according to claim 17, wherein the printed circuit board is disposed at rear surface of a liquid crystal module.

19. The system according to claim 17, wherein the connection pads are electrically connected to the touch controller by one of wires and conductive traces.

20. The system according to claim 17, wherein a first interval between the plurality of individual end portions is equal to a second interval between the connection pads.

21. A liquid crystal display device, comprising:

a liquid crystal module;

a touch controller provided in a touch controller area at a first edge of the liquid crystal module;

a plurality of data driver integrated circuits provide along a second edge of the liquid crystal module within a data driver area;

a plurality of gate driver integrated circuits provided along a third edge of the liquid crystal module within a gate driver area; and

an extension provided along the data driver area into the touch controller area.