Touch panel and an input device equipped therewith
First Claim
1. A touch panel, having a polarizing plate on an upper surface of a main part of the touch panel, comprising a film pasted on an upper surface of the polarizing plate, the film having a heat contraction rate smaller than 0.3% after being exposed to a temperature of 100 degrees C. for 30 minutes, and a water absorption rate smaller than 0.5% after having been soaked in 23-degree C. water for 24 hours.
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Accused Products
Abstract
A touch panel that includes a polarizing plate, and used as an input device of a display unit of a personal computer, a word processor, an electronic notebook and the like is structured by one or more films that have a low heat contraction coefficient and a low water absorption coefficient, which remarkably suppress occurrence of concave deformations of the polarizing plate after exposure to a high temperature and soaking in water, avoiding short circuits.
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Citations
13 Claims
- 1. A touch panel, having a polarizing plate on an upper surface of a main part of the touch panel, comprising a film pasted on an upper surface of the polarizing plate, the film having a heat contraction rate smaller than 0.3% after being exposed to a temperature of 100 degrees C. for 30 minutes, and a water absorption rate smaller than 0.5% after having been soaked in 23-degree C. water for 24 hours.
- 8. A touch panel, having a polarizing plate on an upper surface of a main part of the touch panel, the polarizing plate comprising two films and a polarizing film, wherein the two films sandwich the polarizing film, each of the films that sandwich the polarizing film having a heat contraction rate smaller than 0.3% after being exposed to a temperature of 100 degrees C. for 30 minutes, and a water absorption rate smaller than 0.5% after having been soaked in 23-degree C. water for 24 hours.
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12. A touch panel, comprising:
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a glass substrate; a first transparent resistance film formed on an upper surface of the glass substrate; a further resistance film having an upper surface and a lower surface; a second transparent resistance film, formed on the lower surface of the further resistance film and pasted along peripheral portions thereof to, while spaced from, the upper surface of the glass substrate having the first transparent resistance film thereon; a polarizing plate pasted on the upper surface of the further resistance film; a transparent film pasted on an upper surface of the polarizing plate, having a heat contraction rate smaller than 0.3% after being exposed to a temperature of 100 degrees C. for 30 minutes, and a water absorption rate smaller than 0.5% after having been soaked in 23-degree C. water for 24 hours, and made from one of; polyethylene napthalate, polynorbomen, polycycloolefin, polycarbonate, polyethersulphone, and polyarylate; and the touch panel being formed on a liquid crystal display panel. - View Dependent Claims (13)
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Specification