Resistance-film type touch panel for use in a liquid crystal display device and liquid crystal display device equipped with the same
First Claim
1. 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 a 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 100°
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/Cpc
(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.
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Accused Products
Abstract
The touch panel for use in a liquid crystal display device has a rigid electrode plate composed of a rigid transparent substrate provided with a transparent conductive layer on its upper surface, and a flexible electrode plate composed of a transparent and flexible substrate provided with a transparent conductive layer on its lower surface. On the upper surface of the flexible electrode plate, a polarizer plate is fixed. The flexible transparent substrate includes a transparent film of a transparent amorphous plastic material having a glass transition temperature of 100° C. or higher, and the transparent film has a relative optical elasticity coefficient Cr value of 0.2 to 0.8 defined by the formula: Cr=C/Cpc 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.
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Citations
13 Claims
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1. A touch panel comprising:
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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 a 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 100°
C. or higher, andthe transparent film has a relative optical elasticity coefficient Cr value of 0.2 to 0.8 defined by an equation;
Cr=C/Cpc
(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification