Method of detection of the contacting position in touch panel sensor
First Claim
1. A method of detecting a contact position in a touch panel, comprising the steps of:
- providing first and second resistance layers opposite each other and separated by a predetermined gap, each said resistance layer supported by a respective substrate;
providing a conduction member on at least one edge of said first resistance layer, and providing a conduction member on at least one edge of said second resistance layer extending in a direction perpendicular to the conduction member of said first resistance layer;
connecting a constant current source to the conduction member of said first resistance layer;
flowing a constant current from said constant current source when contact is made between said first and said second resistance layers at a contact point, through the conduction member of said first resistance layer, through said first resistance layer, and through said contact point to said second resistance layer; and
detecting the coordinate position of said contact point by detecting a voltage drop generated by said constant current one each of said respective resistance layers.
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Abstract
In a method of detecting a contacting position using a touch panel, a pair of resistance layers formed on two substrates are opposed with a gap. At least one conduction member is provided on one edge of one of the resistance layers and another conduction member is provided on one edge of another resistance layer which extends in a direction perpendicular to the edge of said one of the resistance layer. A constant current source is connected to one conduction member so that when the resistance layers contact at a contacting position, a constant current flows from the conduction member of one of the resistance layers to the conduction member of said another resistance layer through the contacting point. Thus, the coordinate position of the contacting point can be detected by the voltage drops on the respective resistance layers.
164 Citations
11 Claims
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1. A method of detecting a contact position in a touch panel, comprising the steps of:
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providing first and second resistance layers opposite each other and separated by a predetermined gap, each said resistance layer supported by a respective substrate; providing a conduction member on at least one edge of said first resistance layer, and providing a conduction member on at least one edge of said second resistance layer extending in a direction perpendicular to the conduction member of said first resistance layer; connecting a constant current source to the conduction member of said first resistance layer; flowing a constant current from said constant current source when contact is made between said first and said second resistance layers at a contact point, through the conduction member of said first resistance layer, through said first resistance layer, and through said contact point to said second resistance layer; and detecting the coordinate position of said contact point by detecting a voltage drop generated by said constant current one each of said respective resistance layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification