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

• US 7,508,461 B2
• Filed: 01/07/2004
• Issued: 03/24/2009
• Est. Priority Date: 04/13/1999
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Ahn, Young Soo, Rhee, Jang Youl, Jeong, Yun Cheol, Jeong, Byoung Hyun
• Primary Examiner(s): Ngo; Julie
• Application Number:
  US10/751,881
• Publication Number:
  US 20040189882A1
• Time in Patent Office: 1,903 Days
• Field of Search: 349/12, 349/96, 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 polarizer for a touch panel and a liquid crystal display panel, the polarizer comprising:

a lower film;

an optical film polarizing light for the liquid crystal display panel over the lower film; and

a resistive film printed with electrodes over the optical film, wherein the resistive film includes a base film and transparent conductive layer and serves as one of a pair of resistive films for the touch panel,

wherein the lower film and the base film are formed to maintain the mechanical strength of the optical film,

wherein the polarizer including the optical film and the resistive film is made by a method including;

adhering the lower film to a lower surface of the optical film; and

adhering the resistive film printed with electrodes to an upper surface of the optical film, wherein the resistive film is cut into a predetermined size and then is adhered to the optical film.

2. The polarizer as claimed in claim 1, wherein the lower film is made from a 3-acetyl-cellulose, wherein the base film of the resistive film is made from a substance selected from a group consisting of poly-ethylene-terephthalate, poly-carbonate, and a co-polymer of cyclic-olefin and 3-acetyl-cellulose.

3. The polarizer as claimed in claim 1, wherein the optical film includes poly-vinyl alcohol.