Method of recording a halftone picture electronically
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United States of America Patent
Stats
-
Oct 15, 1985
Grant Date -
N/A
app pub date -
Dec 6, 1982
filing date -
Dec 6, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for recording a halftone picture electronically, for use in a halftone picture reproducing machine for plate making is disclosed. A plurality of halftone data corresponding to a plurality of picture elements of a vignette halftone dot is simultaneously read out of a memory in which the vignette halftone dot quantized is stored, in synchronization with picture signals, and the halftone data and the picture signals are added to obtain recording signals, and according to the recording signals a plurality of light beams for exposure are controlled to be open or close, thereby recording a halftone picture. The number of the light beams included in a recording scanning width is selected depending on a screen pitch, and then the selected light beams are controlled according to the recording signals.
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