Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1994-09-29
1996-11-26
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345132, 345136, G09G 522
Patent
active
055790305
ABSTRACT:
Text and graphics are represented on video screens having a given raster of screen pixels in x- and y-directions and video refresh memories. The necessary glyphs are loaded in an outline format from a memory and get rastered alongside their contours (gridwalk). In order to achieve a better quality of display, the glyphs are represented in grey by calculation of positions, rotations and scalings at a higher resolving fine-raster where there are m fine-pixels in x- and n fine-pixels in y-direction for each screen pixel (m, n>1) and each glyph is rastered alongside its outline either as bitmap or as run length code. For each of the m.times.n fine-pixels, screen pixels are generated according to the character's text position in fine-resolution by adding the bit values of corresponding black fine-pixels and calculating a grey-value according to their sum in relation to all m.times.n fine-pixels and storing these grey-values into the video refresh memory having a depth sufficient to store the maximum of different grey values (for example: 2bit, halfbyte, byte).
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Adobe Systems Incorporated
Bayerl Raymond J.
Luu Matthew
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