Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1994-08-29
1995-12-26
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, G09G 302
Patent
active
054791910
ABSTRACT:
The coordinate input device of the present invention can output a coordinate signal by using a change in a variation amount of an electrostatic capacity. Therefore, mechanical portions of the coordinate input device are reduced in number so that an increase in the life period and an improvement in reliability of the device are easily realized, while not wastefully consuming power, except during a period when the coordinate signal is outputted. The coordinate input device of the present invention outputs the coordinate signal on the basis of a variation amount of an electrostatic capacity which is defined by the position of a dielectric unit between electrode faces and an electrode face confronting these electrode faces. The dielectric unit moves in accordance with the movement of an operation knob. A program mode changeover switch is operated in accordance with the movement of a movable unit which can reciprocate together with the operation knob. When a finger(s) is (are) removed from the operation knob, the operation knob and the movable unit are returned to a home position and a reference position by home-position return springs 8 and a reference-position return spring.
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patent: 4680577 (1987-07-01), Straayer et al.
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patent: 4879556 (1989-11-01), Duimel
patent: 5327162 (1994-07-01), Soma
Chang Vivian W.
Hjerpe Richard
Hosiden Corporation
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