Polarizer integrated with transparent conductive film, a touch panel integrated with the polarizer and a flat panel display integrated with the touch panel

• US 6,765,629 B1
• Filed: 04/13/2000
• Issued: 07/20/2004
• Est. Priority Date: 04/13/1999
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Ahn, Young Soo, Rhee, Jang Youl, Jeong, Yun Cheol, Jeong, Byoung Hyun
• Primary Examiner(s): Ngo, Julie
• Application Number:
  US09/548,677
• Time in Patent Office: 1,559 Days
• Field of Search: 349/12, 349/98, 349/119, 345/173, 345/174
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A polarizer integrated with a transparent conductive film for a liquid crystal display includes a lower film an optical film and a transparent conductive film. A touch panel integrated with the polarizer is formed by attaching an upper sheet to the upper surface of the polarizer integrated with a transparent conductive film. A flat panel display with an integral type touch panel includes a touch panel integrated with the flat panel display having a lower polarizer, a liquid crystal display and an upper polarizer.

Claims

1. A touch panel unit integrated with a polarizer, comprising:

a polarizer integrated with a transparent conductive film, said polarizer having a lower film, an optical film and the transparent conductive film formed sequentially; and

a touch panel having the transparent conductive film and an upper sheet coated with spacers at a lower surface thereof and provided with bus bars and a tail.

2. The touch panel unit as claimed in claim 1, wherein the transparent conductive film includes a base film and a conductive layer.

3. The touch panel unit as claimed in claim 2, wherein the lower film is made from 3-acetyl-cellulose, the optical film is made from poly-vinyl-alcohol, the base film of the transparent conductive film is made from a substance selected from a group consisting of poly-ethylene-terephthalate, poly-carbonate, co-polymer of cyclic-olefin and 3-acetyl-cellulose.

4. The touch panel unit as claimed in claim 1, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

5. A touch panel unit integrated with a polarizer, comprising:

a polarizer integrated with a transparent conductive film, said polarizer having a lower film, an optical film, an upper film and the transparent conductive film formed sequentially; and

a touch panel having the transparent conductive film and an upper sheet coated with spacers at a lower surface thereof and provided with bus bars and a tail.

6. The touch panel unit as claimed in claim 5, wherein the transparent conductive film includes a base film and a conductive layer formed sequentially.

7. The touch panel unit as claimed in claim 6, wherein the lower film of the polarizer is made from 3-acetyl-cellulose, the optical film is made from poly-vinyl-alcohol, the base film of the transparent conductive film is made from a substance selected from the group consisting of poly-ethylene-terephthalate, poly-carbonate, co-polymer of cyclic-olefin and 3-acetyl-cellulose.

8. The touch panel unit as claimed in claim 5, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

9. A flat panel display with an integral type touch panel, comprising:

a lower polarizer having a lower film, an optical film and an upper film;

a liquid crystal display having a lower substrate, an upper substrate and a liquid crystal layer between the lower substrate and the upper substrate formed sequentially over the lower polarizer;

an upper polarizer integrated with a transparent conductive film, said upper polarizer having a lower film, an optical film and the transparent conductive film formed sequentially over the liquid crystal display; and

a touch panel having the transparent conductive film and an upper sheet coated with spacers at a lower surface thereof and provided with bus bars and a tail.

10. The flat panel display as claimed in claim 9, wherein the transparent conductive film has a base film and a conductive layer formed.

11. The flat panel display as claimed in claim 10, wherein the lower film of the upper polarizer is made from 3-acetyl-cellulose, the optical film of the upper polarizer is made from poly-vinyl-alcohol, the base film of the transparent conductive film is made from a substance selected from the group consisting of poly-ethylene-terephthalate, poly-carbonate, co-polymer of cyclic-olefin and 3-acetyl-cellulose.

12. The flat panel display as claimed in claim 9, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

13. A flat panel display with an integral type touch panel, comprising:

a lower polarizer having a lower film, an optical film and an upper film formed sequentially;

a liquid crystal display having a lower substrate, an upper substrate and a liquid crystal between the lower substrate and the upper substrate formed sequentially over the lower polarizer;

an upper polarizer integrated with a transparent conductive film, said upper polarizer having a lower film, an optical film, an upper film and the transparent conductive film are formed sequentially over the liquid crystal display; and

a touch panel having the transparent conductive film and an upper sheet coated with spacers at a lower surface thereof and provided with bus bars and a tail.

14. The flat panel display as claimed in claim 13, wherein the transparent conductive film includes a base film and a conductive layer.

15. The flat panel display as claimed in claim 14, wherein the lower film of the upper polarizer is made from 3-acetyl-cellulose, the optical film of the upper polarizer is made from poly-vinyl-alcohol, the upper film of the upper polarizer is made from 3-acetyl-cellulose, the base film of the transparent conductive film is made from a substance selected from the group consisting of poly-ethylene-terephthalate, a poly-carbonate, co-polymer of cyclic-olefin and 3-acetyl-cellulose.

16. The flat panel display as claimed in claim 13, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

17. A flat panel display comprising:

a first polarizer;

a liquid crystal display over the first portion;

a second polarizer having a transparent conductive film over the liquid crystal display; and

a touch panel having the transparent conductive film over the second polarizer;

wherein the transparent conductive film is a part of both the second polarizer and the touch panel.

18. The flat panel display as claimed in claim 17, wherein the first polarizer includes:

first and second films; and

an optical film between the first and second films.

19. The flat panel display as claimed in claim 17, wherein the liquid crystal display includes:

first and second substrates; and

a liquid crystal layer between the first and second substrates.

20. The flat panel display as claimed in claim 17, wherein the second polarizer includes:

a first film;

an optical film;

wherein the optical film is between the first film and the transparent conductive film.

21. The flat panel display as claimed in claim 20, wherein the second polarizer further includes a second film between the optical film and the transparent conductive film.

22. The flat panel display as claimed in claim 17, wherein the touch panel includes:

an upper sheet having bus bars and a tail between the bus bars; and

spacers between the upper sheet and the transparent conductive film.

23. The flat panel display as claimed in claim 22, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

24. The flat panel display as claimed in claim 17, wherein the transparent conductive film includes:

a base film; and

a conductive layer on the base film.

25. A method of forming a flat panel display comprising:

forming a first polarizer;

forming a liquid crystal display over the first polarizer;

forming a second polarizer having a transparent conductive film over the liquid crystal display; and

forming a touch panel having the transparent conductive film over the second polarizer;

wherein the transparent conductive film is formed to be a part of both the second polarizer and the touch panel.

26. The method as claimed in claim 25, wherein the first polarizer includes:

first and second films; and

an optical film between the first and second films.

27. The method as claimed in claim 25, wherein the liquid crystal display includes:

first and second substrates; and

a liquid crystal layer between the first and second substrates.

28. The method as claimed in claim 25, wherein the second polarizer includes:

a first film;

an optical film;

wherein the optical film is between the first film and the transparent conductive film.

29. The method as claimed in claim 28, wherein the second polarizer further includes a second film between the optical film and the transparent conductive film.

30. The method as claimed in claim 25, wherein the touch panel includes:

an upper sheet having bus bars and a tail between the bus bars; and

spacers between the upper sheet and the transparent conductive film.

31. The method as claimed in claim 30, wherein the upper sheet includes:

a conductive layer;

a base film on the conductive layer; and

an anti-dazzling hard coating layer on the base film.

32. The method as claimed in claim 25, wherein the transparent conductive film includes:

a base film; and

a conductive layer on the base film.