| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of obtaining an excellent image by keeping constant the potential difference between an exposed part potential and a developing bias potential and a potential difference between the developing bias potential and an unexposed part potential while preventing unnecessary toner consumption. <P>SOLUTION: The correction values for developing bias voltage corresponding to the exposure part potential being the potential of an exposed part corresponding to variation in photoreceptor surface temperature are previously found by the environmental temperature and humidity values of the circumference of a photoreceptor. A control part controls the developing bias voltage according to a correction value corresponding to the ambient temperature and humidity of the photoreceptor detected by a temperature and humidity detecting means and the surface temperature of the photoreceptor detected by a photoreceptor surface temperature detecting means, and also controls an electrostatic charging output value according to the developing bias voltage value. <P>COPYRIGHT: (C)2004,JPO |
