Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1997-05-27
1998-10-13
Wu, Xiao
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345168, G09G 508
Patent
active
058219226
ABSTRACT:
A cursor control system for a computer includes a small video camera mounted above the keyboard portion of the computer and pivotable to selectively view (1) a central observation zone generally over the keyboard, (2) a horizontally offset observation zone to the left of the keyboard, or (3) a horizontally offset observation zone to the right of the keyboard. The image received by the video camera of a computer user's hand placed within the selected observation zone is transmitted to cursor control circuitry which monitors the presence, configuration and movement of the hand. When the hand is placed in a first predetermined configuration and moved into and through the zone, the circuitry switches the computer from a keyboard typing mode to a cursor positioning mode, tracks the hand movement through the zone, and correspondingly moves the cursor on the computer display screen. When the hand is then placed in a predetermined second configuration the circuitry causes a cursor "pick" function to be generated in conjunction with the repositioned cursor. Finally, in response to placement of the hand in a third predetermined configuration the circuitry switches the computer from its cursor positioning mode back to its previous keyboard typing mode. The video controlled cursor positioning system is representatively illustrated in both a portable and desktop computer embodiment.
REFERENCES:
patent: 4843568 (1989-06-01), Krueger et al.
patent: 5168531 (1992-12-01), Sigel
patent: 5581276 (1996-12-01), Cipolla et al.
patent: 5677700 (1997-10-01), Schwalba et al.
Compaq Computer Corporation
Wu Xiao
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