Patent ID: 6549195
Filing Date: 2003-04-15
Classification: G02F,G06F

Abstract:
A touch panel comprising:a rigid electrode plate including a first substrate which is transparent and rigid, and has a first main surface and a second main surface, and a first transparent electrically conductive layer provided on the second main surface of the first substrate; a flexible electrode plate including a second substrate which is transparent and flexible, and has a first main surface and a second main surface, and a second transparent electrically conductive layer provided on the first main surface of the second substrate, said flexible electrode plate being arranged spaced apart from the rigid electrode plate such that the second transparent conductive layer faces the first transparent conductive layer; and a polarizer plate fixed on the second main surface of the second substrate; wherein said flexible electrode has a flexibility sufficient to yield by a pressing force applied pointwise on the polarizer plate to bring the second transparent conductive layer into point contact with the first transparent conductive layer; the second substrate is made of a transparent film of a transparent amorphous plastic material having a glass transition temperature of 100Â° C. or higher, and the transparent film has a relative optical elasticity coefficient Cr value of 0.2 to 0.8 defined by an equation: Cr=C/Cpcâ€ƒâ€ƒ(1) where C represents an optical elasticity coefficient of the transparent film and Cpc represents an optical elasticity coefficient of a polycarbonate film derived from bisphenol A.