Touch screen system and display device using the same

• US 7,253,808 B2
• Filed: 11/06/2003
• Issued: 08/07/2007
• 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
• Primary Examiner(s): Chang; Kent
• Application Number:
  US10/701,638
• Publication Number:
  US 20040095334A1
• Time in Patent Office: 1,370 Days
• Field of Search: 345/173, 178/18.01, 361/679, 361/686
• 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;

a printed circuit board mounted on the touch controller and including a plurality of connection pads connected with the touch controller;

a flexible printed circuit connected with the touch panel and including a plurality of signal lines overlapping the plurality of connection pads of the printed circuit board; and

an anisotropic conductive film electrically interconnecting the signal lines of the flexible printed circuit and connection pads of the printed circuit board.

2. The system according to claim 1, wherein the printed circuit board includes a fixing guide disposed around the connection pads and contacting side portions of the anisotropic conductive film.

3. The system according to claim 1, 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.

4. The system according to claim 3, wherein the printed circuit board is disposed at a rear surface of the liquid crystal module.