Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1992-09-23
1994-05-17
Chin, Tommy P.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345127, G09G 302
Patent
active
053132289
ABSTRACT:
A method and apparatus for interactively generating a profile for an electronic image creation tool. The apparatus comprises a monitor (30); an operator input device (5, 31) ; a store (22) for storing the profile of an electronic image creation tool; and a processing system (1,2). The processing system is adapted to display an initial form of profile on the monitor (30), the digitizing tablet being operated by an operator so as to position an indicator on the monitor display at a desired position relative to the display profile. The processing system (1,2) is adapted to determine one or both of the distance of the indicator position from a datum position and the direction of the indicator position relative to a datum direction, and to monitor the profile in accordance with a predetermined algorithum dependent on the determined distance and/or determined direction.
REFERENCES:
patent: 4514818 (1985-04-01), Walker
patent: 4739317 (1988-04-01), Berry et al.
Swokowski, Earl; Calculus w/Analytic Geometry, 1983 pp. 15-16, 565-570, 594-595, 598.
LisaDraw, 1984 pp. 137-138.
"Direct Graphics Manipulation", IBM Technical Disclosure Bulletin, vol. 31, No. 12, May 1989, pp. 364-366.
Au A.
Chin Tommy P.
Crosfield Electronics Limited
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