Pulse width modulation greyscale system

Details Pulse width modulation greyscale system Pulse width modulation greyscale system

H - Electricity

04

N

314/28

H04N 1/23 (2006.01) H04N 1/405 (2006.01) H04N 1/407 (2006.01)

Patent

CA 1192601

ABSTRACT The present invention is a one dimensional electronic halftone generating system having a source of digital data representative of pixel greyscale, a counter to store the digital data, and pulse producing logic responsive to the counter to activate a laser modulator in accordance with the digital data representative of each pixel. In particular, a six bit data word represents one of 64 greyscale states for a particular pixel. The pulse producing logic responds to the particular data word to produce a pulse of a given duration or width to drive the laser for a given time period. The duration of the pulse, representing one to 64 states for a given pixel, will produce a given discrete greyscale value for each pixel.

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