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

• US 7,705,923 B2
• Filed: 02/26/2009
• Issued: 04/27/2010
• Est. Priority Date: 04/13/1999
• Status: Expired due to Fees

• Current Assignee: LG Chem Limited (LG Corporation), LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Original Assignee: LG Chem Limited (LG Corporation), LG Display Co., Ltd.
• Inventors: Ahn, Young Soo, Rhee, Jang Youl, Jeong, Yun Cheol, Jeong, Byoung Hyun
• Primary Examiner(s): NGO, HUYEN LE
• Application Number:
  US12/379,693
• Publication Number:
  US 20090168169A1
• Time in Patent Office: 425 Days
• Field of Search: 349/12, 349/96, 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 having comprising:

a lower film;

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

an upper film over the optical film; and

a resistive film printed with electrodes over the upper 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.

2. The polarizer as claimed in claim 1, wherein the lower film is made from 3-acetyl-cellulose, the upper film is a 3-acetyl-cellulose, 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, and the optical film includes poly-vinyl alcohol.