Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1997-11-03
2000-11-21
Shalwala, Bipin H.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
178 1803, 178 1805, G09G 500
Patent
active
061510130
ABSTRACT:
An improved position responsive sensor is disclosed comprising a substrate having first and second parallel, conductive strips at the edges in electrical contact with high resistance coating on the top surface and low resistance coating on the bottom surface respectively. A d. c. voltage is applied to the top surface of substrate, at the same time an a. c. voltage is applied to the bottom surface. An electrical conductive probe or a flexible resistive sheet is used to detected both d. c. and a. c. voltage between the contact point and the ground, whereby the electrical output signals are accurately related to the x and y coordinates of the contacted point on the top surface of substrate.
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Chang Kent
Sentech
Shalwala Bipin H.
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