Touch panel display apparatus and method of fabricating the same

• US 20030122799A1
• Filed: 12/24/2002
• Published: 07/03/2003
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Yu, Hwan Seong
• Granted Patent: US 7,336,261 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel display apparatus includes an upper sheet having an upper transparent film formed of one of a crystalline transparent conductive material and an amorphous transparent conductive material, and a lower sheet having a lower transparent film formed of one of an other one of the crystalline transparent conductive material and the amorphous transparent conductive material.

Claims

1. A touch panel display apparatus, comprising:

an upper sheet having an upper transparent film formed of one of a crystal line transparent conductive material and an amorphous transparent conductive material; and

a lower sheet having a lower transparent film formed of one of an other one of the crystalline transparent conductive material and the amorphous transparent conductive material.

2. The apparatus according to claim 1, further comprising a liquid crystal display device position on a bottom surface of the lower sheet.

3. The apparatus according to claim 1, wherein the upper and lower transparent films both include one of indium-tin-oxide, indium-zinc-oxide, and indium-tin-zinc-oxide.

4. The apparatus according to claim 1, further comprising an electrode layer formed along outer areas of the upper and lower sheets, and a spacer formed between the upper and lower transparent films for maintaining a specific gap therebetween.

5. A method of fabricating a touch panel display apparatus, comprising steps of:

forming an upper sheet and a lower sheet;

forming a first transparent conductive material having one of a crystalline structure and amorphous structure on the upper sheet to form an upper transparent film; and

forming a second transparent conductive material having an other one of the crystalline structure and the amorphous structure on the lower sheet to form a lower transparent film.

6. The method according to claim 5, further comprising a step of positioning a liquid crystal display device at a bottom surface of the lower sheet.

7. The method according to claim 5, wherein the crystalline structure is formed by a heat treatment applied to the amorphous transparent conductive material at a temperature below a melting point of the transparent conductive material.

8. The method according to claim 5, wherein the upper and the lower transparent films are formed of one of indium-tin-oxide, indium-zinc-oxide, and indium-tin-zinc-oxide.

9. The method according to claim 5, further comprising steps of forming an electrode layer along an outer area of the upper and lower sheets for supplying a voltage, and forming a spacer between the upper and lower transparent films for maintaining a specific gap therebetween.