Dynamic control of laser power in electrophotographic device to produce accurate positive and negative printed output
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United States of America Patent
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Nov 21, 2000
Grant Date -
N/A
app pub date -
Mar 18, 1997
filing date -
Mar 18, 1997
priority date (Note) -
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Abstract
A method for controlling the intensity of an imaging laser of an electrophotographic device in order to produce both positive and negative output. This is accomplished by using a software controlled digital circuit to increase or decrease the power supplied to the laser based on the user's desire to print positive or negative output. When the user desires to print positive output, the laser is set to full power. When the user selects negative mode printing, the power to the laser is digitally reduced by a factor unique to the electrophotographic characteristics of the printing device.
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