Three dimensional wireless pointing device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 2, 1999
Grant Date -
N/A
app pub date -
Jan 10, 1997
filing date -
Jan 17, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Three dimensional wireless pointing device for calculating coordinates and controlling a position of a cursor in a three dimensional space is disclosed, including a transmission side having a plurality of ultrasonic wave generating parts and a single infrared ray emitting part or a single ultrasonic wave generating part and a plurality of infrared ray emitting parts arranged in a certain axis direction at certain angles and a reception side having a plurality of infrared ray receiving sensors and a single ultrasonic wave receiving sensor arranged to cross the ultrasonic wave generating part(s) and the infrared ray emitting part(s) in the transmission side at a right angle, thereby to measure intensities of the infrared ray(s) and the ultrasonic wave(s) varied depending on direction of pointing and calculate a difference of relative traveling time periods of the infrared ray and the ultrasonic wave to obtain coordinate values of a position in a three dimensional space, whereby a position of cursor or menu, which is a control objective, can be controlled using the obtained coordinate values.
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