| 摘要 |
<p>An object of the present invention is to solve a problem in which in an image forming apparatus which performs pulse width modulation, when the maximum pulse width is changed to change the maximum density, the exposure amount in patch formation also changes to make it difficult to accurately control the patch and maintain gradation characteristics. To achieve this object, the maximum pulse width of pulse width modulation can be changed. It is determined whether a patch is to be formed. For normal image formation, the maximum pulse width is set to a changed value. For patch formation, the maximum pulse width is set at a predetermined value, and an image is formed. <IMAGE></p> |
