Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1997-01-31
1999-06-29
Nguyen, Chanh
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345156, G09G 508
Patent
active
059174749
ABSTRACT:
The present invention relates to a trackball/actuator assembly for a portable computer that includes one or more free pivot-arm key plates disposed around a trackball module. According to one embodiment of the present invention, it includes a housing having a top surface and sidewalls extending downward from opposite ends of the top surface, a first keyplate protruding from the top surface between the sidewalls, a second keyplate protruding from the top surface between the sidewalls, and a trackball disposed between the keyplates. First and second pivot joints formed integral to the first and second sidewalls, respectively, form a first horizontal axis between the sidewalls that is offset from the first keyplate. The first keyplate is rotatably coupled to first and second pivot joints so that it pivots freely about the first horizontal axis. Third and fourth pivot joints formed integral to said first and second sidewalls, respectively, form a second horizontal axis between the sidewalls that is offset from the second keyplate. The second keyplate is rotatably coupled to third and fourth pivot joints so that it rotates freely about the second horizontal axis.
REFERENCES:
patent: 5235868 (1993-08-01), Culver
patent: 5298919 (1994-03-01), Chang
patent: 5565891 (1996-10-01), Armstrong
patent: 5657051 (1997-08-01), Liao
patent: 5712725 (1998-01-01), Faltermeier et al.
patent: 5726684 (1998-03-01), Blankenship et al.
Logitech Inc.
Nguyen Chanh
Suraci John
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