Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1996-06-26
1997-09-02
Powell, Mark R.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
G06F 3033
Patent
active
056637470
ABSTRACT:
A pointing device employs a panel mounted at an opening in a keyboard of a computer, such as a portable computer with a hinged display screen. The panel is mounted with freedom to move in two dimensions. A knob projecting from atop the panel has an indicating pushbutton. A sensor mounted adjacent to the panel can produce a motion signal in response to motion of the panel. The panel may be mounted with freedom to rise above the sensor and move in the two dimensions without actuating the sensor. Also, a limit detector may be mounted near the opening to sense arrival of the knob at a border of the opening. A controller coupled to the indicating button and the sensor can provide an encoded signal signifying the motion signal and actuation of the indicating button, and if employed, the limit detector.
REFERENCES:
patent: 4782327 (1988-11-01), Kley et al.
patent: 5286024 (1994-02-01), Winblad
patent: 5428355 (1995-06-01), Jondrow et al.
Adams Thomas L.
Norandor Systems, Inc.
Powell Mark R.
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