Image forming device, image density stabilization control method, and recording medium

An image density stabilization control method of an image forming device that forms an image by an electrographic method, the image density stabilization control method comprising:

• charging a photosensitive body at the time of printing;
• predicting an amount of fluctuation in a charged potential of the photosensitive body;
• irradiating the photosensitive body with an exposure laser and forming an electrostatic latent image;
• developing the electrostatic latent image;
• and
• correcting an output of the exposure laser;
• wherein
• in predicting the amount of fluctuation, the amount of fluctuation in the charged potential after printing has been stopped is predicted from a combination of a charging stop time and a charging duration in charging the photosensitive body,
• in correcting the output of the exposure laser, a change in density of the image caused by a fluctuation in the charged potential is reduced by correcting the output of the exposure laser to be irradiated with respect to the photosensitive body according to the amount of fluctuation in the charged potential,
• in correcting the output of the exposure laser, a correction amount of the output of the exposure laser is determined such that, when the charging stop time is shorter than a predetermined reference time, the correction amount of the output of the exposure laser increases as the charging duration in charging the photosensitive body becomes shorter, and
• in correcting the output of the exposure laser, the correction amount of the output of the exposure laser is determined according to a length of the charging stop time, when the charging stop time is the same as or longer than the predetermined reference time.

A computer-readable non-transitory recording medium that records an image density stabilization control program executed by an image forming device that forms an image by an electrographic method, the program causing a processor of the image forming device to execute:

• charging a photosensitive body at the time of printing;
• predicting an amount of fluctuation in a charged potential of the photosensitive body;
• irradiating the photosensitive body with an exposure laser and forming an electrostatic latent image;
• developing the electrostatic latent image;
• and
• correcting an output of the exposure laser;
• wherein
• in predicting the amount of fluctuation, the amount of fluctuation in the charged potential after printing has been stopped is predicted from a combination of a charging stop time and a charging duration in charging the photosensitive body,
• in correcting the output of the exposure laser, a change in density of the image caused by a fluctuation in the charged potential is reduced by correcting the output of the exposure laser to be irradiated with respect to the photosensitive body according to the amount of fluctuation in the charged potential,
• in correcting the output of the exposure laser, a correction amount of the output of the exposure laser is determined such that, when the charging stop time is shorter than a predetermined reference time, the correction amount of the output of the exposure laser increases as the charging duration in charging the photosensitive body becomes shorter, and
• in correcting the output of the exposure laser, the correction amount of the output of the exposure laser is determined according to a length of the charging stop time, when the charging stop time is the same as or longer than the predetermined reference time.