Image forming apparatus

An image forming apparatus configured to expose a surface of a photosensitive member with light to form an electrostatic latent image, and attach toner to the electrostatic latent image to form an image, the image forming apparatus comprising:

• an exposure head configured to expose the surface of the photosensitive member with light to form the electrostatic latent image and including a light emitting portion that includes a substrate, a first electrode layer including a plurality of electrodes that are two-dimensionally arranged in a rotation direction of the photosensitive member and a rotational axis direction of the photosensitive member and are arranged on the substrate at intervals, a light emitting layer stacked on the first electrode layer and configured to emit light when a voltage is applied, and a second electrode layer arranged on a side opposite to a side where the first electrode layer is arranged with respect to the light emitting layer and through which light is transmissible;
• and
• a controller configured to control application of a voltage to each of the plurality of electrodes included in the first electrode layer based on image data in such a way that the light emitting layer emits light and configured to control the voltage applied to each of the plurality of electrodes based on the image data in such a way that one pixel is formed by controlling the voltage applied to the plurality of electrodes arranged at different positions in the rotation direction,
• wherein the plurality of electrodes are arranged in such a way that a pitch of the plurality of electrodes included in the first electrode layer in the rotation direction is an integer multiple of a resolution of the image formed by the image forming apparatus in the rotation direction, excluding an equal multiple.