Touch sensitive computer input device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 27, 1981
Grant Date -
N/A
app pub date -
Oct 16, 1978
filing date -
Apr 5, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for detecting the position of an object, e.g. for interaction with a computer graphic display, has a number of light emitting diodes in an endless array, and a lesser number of light detecting devices for providing electrical signals in response to momentary and successive energization of the light emitting diodes. The signals are electronically processed to provide cartesian co-ordinates. This apparatus provides high resolution with a minimum number of light detecting devices and enables too large objects and malfunctions to be readily detected.
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