METHOD OF CONTROLLING OPTICAL POWER OF LASER SCANNING UNIT AND IMAGE FORMING APPARATUS FOR PERFORMING THE METHOD
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United States of America Patent
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Issued Date -
Apr 30, 2015
app pub date -
Oct 7, 2014
filing date -
Oct 25, 2013
priority date (Note) -
Abandoned
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Abstract
An image forming apparatus may include a laser scanning unit which irradiates light to a photosensitive body to form an image; a feedback information provision unit which provides feedback information used to control optical power of the laser scanning unit; and a main controller which controls the optical power of the laser scanning unit by adjusting a voltage that is applied to the laser scanning unit by using the feedback information. The main controller performs primary optical power control by comparing a density of a sample patch formed on the photosensitive body by the laser scanning unit, the density received from the feedback information provision unit, with a target density that is previously stored and performs secondary optical power control by comparing a feedback voltage received from the feedback information provision unit with the target voltage obtained during the primary optical power control.
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