Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1993-09-08
1996-06-18
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
348734, G09G 500
Patent
active
055282644
ABSTRACT:
A hand-held device produces an omnidirectional beam of infra-red light which can be aimed by the user. A plurality of detectors positioned in a rectangular array adjacent a video monitor and each detector produces an electrical signal that varies as a function of the light intensity impinging thereon. A circuit compares the signals from the detectors to determine coordinates of a position on the monitor at which to place a cursor. A linear transfer function is applied to the detector signals before determining the coordinates. The coordinates are processed by a seventh order recursive digital filter and the resultant position must be a minimum distance from the present position before the cursor is relocated. By varying the direction of the light beam the cursor position can be changed. When the cursor is at the position desired by the user, the hand-held device is activated to produce a different light beam. The circuit responds to this change in the light beam by producing a signal indicating that the user has selected the present position of the cursor.
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Kautzer Jeffrey A.
Putra Timothy P.
Relihan Gary F.
Farnandez Stoll Kara
General Electric Company
Hjerpe Richard
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