Display screen control apparatus

Details Display screen control apparatus Display screen control apparatus

1994-12-05

1996-04-23

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

345160, 345161, G09G 500

Patent

active

055108105

ABSTRACT:
A display screen control apparatus for producing a plurality of control signals in response to pressing, tilting and rotating a single operation lever, the control signals being transmitted to control circuitry for controlling the position of a cursor on the display screen in response to the control signals. The display screen control apparatus includes a base upon which are formed a plurality of control switches, the operation lever being resiliently positioned over the control switches such that pressing the operation lever actuates a first control switch, tilting the operation lever actuates one of a plurality of second control switches, and rotating the operation lever actuates one of two third control switches.

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patent: 4879556 (1989-11-01), Duimel
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patent: 4968257 (1990-11-01), Yalen
patent: 5034574 (1991-07-01), Martovitz
patent: 5252821 (1993-10-01), Sugimura

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