Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1994-08-16
1998-08-18
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, 345161, 345169, G09G 508
Patent
active
057963878
ABSTRACT:
A positioning controller having a receiving side for receiving light from a light source is disclosed. The receiving side includes an axis extending perpendicularly therefrom, and a vertical plane and a horizontal plane intersecting at the axis. The positioning controller includes three sensors. The reference sensor is positioned between the other two sensors, and is masked to receive light within a predetermined range of acute angles measured from the axis. One of the other two sensors is a vertical angle sensor that is masked to receive a larger quantity of light from a first side of the horizontal plane and from a second side of the horizontal plane. The third sensor is a horizontal angle sensor that is masked to receive a larger quantity of light from a first side of the vertical plane than from a second side of the vertical plane. The positioning controller further includes circuitry for determining an orientation of the positioning controller using the amounts of light received by the reference sensor, the vertical angle sensor, and the horizontal angle sensor.
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Curran Kenneth J.
Smith, III Jay
Hjerpe Richard
Kim Juliana S.
Smith Engineering
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