Touch sensitive display device
First Claim
1. A touch sensitive display device comprising a multiple of picture elements between two substrates, having spacing means between the substrates and means for applying driving voltages to at least one of said picture elements together with means for monitoring the electrical characteristics of at least one of said picture elements or the electrical characteristics of the spacing means and sensing a change in said electrical characteristics the spacing means being part of said means for monitoring the electrical characteristics.
1 Assignment
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Accused Products
Abstract
In a touch sensor the change in electrical characteristics (impedance, piezo-voltage) of spacing elements (13,14,15,25), provided with an conducting, resistive or piezo-electric layer (15, 25), are measured to determine the sensing area.
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Citations
12 Claims
- 1. A touch sensitive display device comprising a multiple of picture elements between two substrates, having spacing means between the substrates and means for applying driving voltages to at least one of said picture elements together with means for monitoring the electrical characteristics of at least one of said picture elements or the electrical characteristics of the spacing means and sensing a change in said electrical characteristics the spacing means being part of said means for monitoring the electrical characteristics.
Specification