Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-11-14
2000-05-30
Luu, Matthew
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345147, G09G 510
Patent
active
060696109
ABSTRACT:
In an error diffusion processing unit to get a false half tone diffusing in the surroundings the luminance error between the original picture element signal quantizedly input and the preceding data, one dot of said signal is converted into plural picture elements. The respective picture elements (pixels) thus converted are compared with the prior data to detect the luminance error, which will then be weighted by multiplying it with certain coefficient to give, for instance, the reproduced error in one line past, that in one dot past and further the reproduced error a in one-line and one-dot past, which will respectively be added to the original pixels. Producing a false tone by error variance in unit of pixel enables to display the half tone without expanding the half tone display area beyond required dot number.
REFERENCES:
patent: 5548305 (1996-08-01), Rupel
patent: 5592592 (1997-01-01), Shu
patent: 5596349 (1997-01-01), Kobayashi et al.
patent: 5623281 (1997-04-01), Markandey et al.
Denda Hayato
Kobayashi Masayuki
Kosakai Asao
Matsunaga Seiji
Nakajima Masamichi
Fujitsu General Limited
Luu Matthew
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