Optical pointing device
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United States of America Patent
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Sep 3, 1991
Grant Date -
N/A
app pub date -
Dec 6, 1988
filing date -
Dec 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to an optical pointing device which preferably uses infrared light as a source and a camera as a detector. Movements of the camera with respect to the light source which remains fixed are sensed in the detector portion of the camera to determine the direction in which the camera is pointing with respect to, for example, a display screen adjacent the light source. The electronics included in the present invention are designed to act, responsive to sensing of the position of the camera with respect to the light source to cause corresponding movements of a cursor on the display screen. Other modes of operation of the present invention are also disclosed.
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