Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-03-25
2000-05-16
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345147, 345148, 345149, 358455, 358457, G09G 336
Patent
active
060643595
ABSTRACT:
The gray shade rendering capability of a display device having a frame rate of q frames per display cycle is enhanced by comparing an intensity value representing a gray shade of a current pixel with a respective dither matrix threshold value and providing a pixel on/off signal, storing a plurality of quantization values ranging from 1 to q in a quantization table, outputting p quantization values from the quantization table as active quantization values in accordance with a quantized pixel value p, shifting the quantization values in the table in response to a frame signal, comparing a quantized dither matrix threshold value to the active quantization values and producing an active quantized threshold signal, producing a pixel out signal in response to the pixel on/off signal and the active quantized threshold signal, and in response to the pixel out signal displaying the current pixel with an average gray value of p/q through a display period of q frames.
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Lin Tsung-Nan
Shu Joseph
Swic Jerzy Wieslaw
Hjerpe Richard A.
Nguyen Kimnhung
Seiko Epson Corporation
Watson Mark P.
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