Coordinates input device, coordinates input method, a display board system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 11, 2003
Grant Date -
N/A
app pub date -
Jan 20, 2000
filing date -
Jan 29, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A coordinates input device comprises, two optical units which emit a light flux onto a panel and also receive the light flux. The coordinates input device then calculates the coordinates of an obstacle in the light flux on the panel based on the result of light flux detection in the optical units and the dimensions of the panel. The coordinates input device further comprises a sound-wave generator and a sound-wave detector for measuring the dimensions, used in the calculation of the coordinates, of the panel.
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