Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1995-07-25
1996-11-26
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345168, G09G 508
Patent
active
055790321
ABSTRACT:
The present invention provides a pointing device for a computer system having a chassis. The pointing device comprises a sensor carrier slidably coupled to the chassis to allow substantially linear reciprocating movement with respect to the chassis. A first sensor, which may be a potentiometer, is coupled to the sensor carrier and is adapted to generate a first signal as a function of an angular displacement of a rotatable shaft associated with the first sensor. The pointing device further comprises a second sensor coupled to the chassis that is adapted to generate a second signal as a function of the linear reciprocating movement of the sensor carrier. The first and second signals cooperate to provide input data representing a unique point on a computer screen of the computer system. The second sensor may also be a potentiometer, an optical encoder or alternatively includes first and second electrical terminals coupled to the sensor carrier and the chassis, respectively. A resistive strip that couples the first and second electrical terminals is also provided. The resistive strip provides a resistance path between the first and second electrical terminals that generates the second signal a function of the linear reciprocating movement between the first and second electrical terminals.
REFERENCES:
patent: D360407 (1995-07-01), Collas et al.
patent: 4712101 (1987-12-01), Culver
patent: 4823634 (1989-04-01), Culver
patent: 5208736 (1993-05-01), Crooks et al.
Dell USA L.P.
Hjerpe Richard
Wu Xiao M.
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