| 摘要 |
PROBLEM TO BE SOLVED: To automatize the density adjustment of an image forming device. SOLUTION: The image forming device has the input line 102 of the image data D1 of an original, the input line 104 of data D2 for density adjustment and a selector 110. The density data D2 is outputted at an adjusting time, and is synthesized with an output from a triangular wave generating circuit 140, so that a pulse is formed. A CPU 130 reads voltage corresponding to the pulse, and calculates a difference from target voltage. A bias correction value for correcting the difference is transmitted to the triangular wave generating circuit 140, and the bias value of a reference triangular wave is changed, so that the pulse corresponding to the target voltage is generated. |
