Image forming apparatus including exposure head provided with plurality of light emitting chips

An image forming apparatus, comprising:

• a photosensitive member that is driven to rotate;
• an exposure head including a plurality of light emitting chips that are placed at different positions in a direction along a rotation axis of the photosensitive member, each of the plurality of light emitting chips including a plurality of light emitting elements that are placed at different positions in the direction along the rotation axis of the photosensitive member, a digital-analog converter that outputs a voltage corresponding to a setting value as a digital value, and a circuit unit that supplies a current to the plurality of light emitting elements based on the voltage output from the digital-analog converter;
• and
• at least one processor,
• wherein
• the at least one processor is configured to:
• generate second image data corresponding to each of the plurality of light emitting elements based on first image data, the second image data indicating whether to cause each of the plurality of light emitting elements to emit light, and
• based on correction information, change the first image data indicating that a part of the plurality of light emitting elements are to emit light to the second image data indicating that the part of the plurality of light emitting elements are not to emit light, and
• the circuit unit supplies a current to each of the plurality of light emitting elements based on the second image data.