Charging device and image forming apparatus incorporating same
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United States of America Patent
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May 31, 2016
Grant Date -
Sep 3, 2015
app pub date -
Feb 19, 2015
filing date -
Mar 3, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A charging device includes a charger and a power supply circuit. The charger is disposed opposing a latent image bearer. The power supply circuit applies to the charger an alternating voltage obtained by superimposing a pulsating voltage on a direct-current voltage. The alternating voltage generates normal discharge from the charger to a surface of the latent image bearer and reverse discharge from the surface of the latent image bearer to the charger. A pulse ON time of a voltage component toward a reverse discharge side relative to a desired surface potential Vde of the latent image bearer is shorter than a pulse ON time of a voltage component toward a normal discharge side relative to the desired surface potential Vde of the latent image bearer.
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