| 摘要 |
This disclosure relates to an image forming apparatus in which an image is formed by deflecting a light beam a minute distance in a sub-scanning direction every pixel of image data. By controlling the emission intensity of the light beam utilizing a gamma correction, and by controlling the emission time of the light beam utilizing PWM control, the beam spot can be adjusted to control the dot size of the image. Accordingly, the dot density in image formation can be raised by minute deflection in the sub-scanning direction, and the reproducibility of characters and graphics is improved, particularly in the oblique direction. Furthermore, tone reproducibility of multi-tone image data is enhanced by minute deflection in the sub-scanning direction and adjustment of image dot size.
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