Liquid crystal panel device having a touch panel and method of fabricating the same

• US 6,972,750 B2
• Filed: 12/26/2002
• Issued: 12/06/2005
• Est. Priority Date: 12/27/2001
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Yu, Hwan Seong
• Primary Examiner(s): Eisen, Alexander
• Assistant Examiner(s): MAK, ROBIN C
• Application Number:
  US10/328,042
• Publication Number:
  US 20030122801A1
• Time in Patent Office: 1,076 Days
• Field of Search: 345173-178, 178/18, 428/41.8, 428/202
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133528 Polarisers
• 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 integrated liquid crystal display panel, includes a liquid crystal display panel displaying a picture by driving liquid crystal, a polarizer formed at the top of the liquid crystal display panel, and a touch panel with a separation tag extending outwards from at least one side of the top of the polarizer.

Claims

1. A touch panel device integrated with a liquid crystal display panel device, comprising:

a liquid crystal display panel;

a polarizer formed at a top surface of the liquid crystal display panel; and

a touch panel formed on the polarizer, the touch panel including a lower plate having, a separation tag extending outwardly from one side of the lower plate, such that when an upward force is applied on the separation tag, the touch panel separates from at least one side of the polarizer.

2. The touch panel device according to claim 1, wherein the touch panel includes:

a first electrode layer on an upper substrate of a upper plate;

a second electrode layer on the lower plate; and

a spacer formed between the upper plate and the lower plate.

3. The touch panel device according to claim 2, wherein the separation tag and the lower substrate are integrally formed.

4. The touch panel device according to claim 3, wherein the separation tag includes polyethylene terephthalate.

5. The touch panel device according to claim 2, wherein the first and the second electrode layers are formed of a transparent electrode and silver formed on the transparent electrode.

6. The touch panel device according to claim 1, wherein the liquid crystal display panel includes:

an upper plate bonded with the polarizer;

a lower plate facing the upper plate; and

a spacer for maintaining a specific gap between the upper plate and the lower plate.

7. The touch panel device according to claim 6, wherein the upper plate includes:

an upper substrate;

a black matrix formed on the upper substrate;

a color filter formed on the upper substrate where the black matrix is formed;

a common electrode formed on the color filter; and

a first alignment film formed covering the common electrode.

8. The touch panel device according to claim 6, wherein the polarizer is formed between the upper plate of the liquid crystal display panel and the lower plate of the touch panel.

9. The touch panel device according to claim 6, comprising:

a first adhesive formed between the polarizer and the lower plate of the touch panel; and

a second adhesive formed between the polarizer and the upper plate of the liquid crystal display panel.

10. The touch panel device according to claim 6, wherein the lower plate of the liquid crystal display panel includes:

a lower substrate;

a gate line formed on the lower substrate;

a data line formed crossing the gate line;

a thin film transistor formed at an intersection of the gate line and the data line;

a pixel electrode connected to the thin film transistor; and

a second alignment film formed covering the pixel electrode.

11. A method of fabricating a touch panel integrated liquid crystal display panel, comprising the steps of:

forming a liquid crystal display panel;

forming a polarizer at a top surface of the liquid crystal display panel; and

forming a touch panel on the polarizer, the touch panel including a lower plate having a separation tag extending outwardly from one side of the lower plate, such that when an upward force is applied on the separation tag, the touch panel separates from at least one side of the polarizer.

12. The method according to claim 11, further comprising the steps of:

forming a first electrode layer on an upper substrate of an upper plate of the touch panel;

forming a second electrode layer on the lower plate of the touch panel; and

forming a spacer between the upper plate and the lower plate.

13. The method according to claim 12, wherein the separation tag is formed of a same material as the lower substrate.

14. The method according to claim 13, wherein the separation tag includes polyethylene terephthalate.

15. The method according to claim 12, wherein the first and the second electrode layers are formed of a transparent electrode and silver Ag is formed on the transparent electrode.

16. The method according to claim 11, wherein the liquid crystal display panel includes:

an upper plate bonded with the polarizer;

a lower plate facing the upper plate; and

a spacer for maintaining a specific gap between the upper plate and the lower plate.

17. The method according to claim 16, wherein the upper plate of the liquid crystal display panel includes:

an upper substrate;

a black matrix formed on the upper substrate;

a color filter formed on the upper substrate where the black matrix is formed;

a common electrode formed on the color filter; and

a first alignment film formed covering the common electrode.

18. The method according to claim 17, wherein the lower plate of the liquid crystal display panel includes:

a lower substrate;

a gate line formed on the lower substrate;

a data line formed crossing the gate line;

a thin film transistor formed at an intersection of the gate line and the data line;

a pixel electrode connected to the thin film transistor; and

a second alignment film formed covering the pixel electrode.

19. The method according to claim 16, wherein the polarizer is formed between the upper plate of the liquid crystal display panel and the lower plate of the touch panel.

20. The method according to claim 16, comprising:

forming a first adhesive between the polarizer and the lower plate of the touch panel; and

forming a second adhesive between the polarizer and the upper plate of the liquid crystal display panel.