Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1992-03-30
1994-08-02
Chin, Tommy P.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345120, G09G 526
Patent
active
053349946
ABSTRACT:
When an image is enlarged or reduced at a predetermined magnification and then the enlarged or reduced image is displayed on a display window whose part is shielded from another window, a work memory corresponding to the size of the display window is secured, image data is first enlarged or reduced by an enlargement/reduction circuit and transferred onto the secured work memory. The image data transferred onto the work memory is stored as it is in a region on a display memory for storing a content displayed on a display, the region corresponding to the display window. Even when an unshielded part of the display window includes a plurality of rectangular regions, the enlargement or reduction processing can be performed at once, with a result that an image can be clearly displayed without causing any shift between any two images on the rectangular regions.
REFERENCES:
patent: 4806919 (1989-02-01), Nakayama et al.
patent: 5079724 (1992-01-01), Shiraki et al.
patent: 5151974 (1992-09-01), Tani et al.
Au A.
Chin Tommy P.
Kabushiki Kaisha Toshiba
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