Optical print head and image forming device

An image forming device comprising:

• an optical print head comprising:
• light emitting elements arranged in a line-shaped region;
• drivers corresponding one to one with the light emitting elements, the drivers for causing the light emitting elements to emit light;
• and
• setters for outputting luminance signals that indicate to the drivers light emission amounts of the light emitting elements according to image data, wherein light emitted by the light emitting elements exposes a photoreceptor surface line by line;
• a detector for detecting a noise component superimposed on a luminance signal, on transmission circuitry for transmitting the luminance signal from a setter to a driver, in a state in which the setter is outputting the luminance signal;
• and
• a generator that, for each light emitting element due to emit light in a line subsequent to a line for which the detector detected the noise component, generates and causes a setter corresponding to the light emitting element to output an adjusted luminance signal such that the light emitting element emits a light emission amount according to the image data in a state in which the noise component detected by the detector is superimposed on the adjusted luminance signal,
• wherein the drivers are thin film transistors, for each of which a constant voltage is applied to a source terminal, and a drain current corresponding to a gate-source voltage Vgs is supplied to cause a corresponding light emitting element to emit light, and
• the detector detects the noise component superimposed on a gate voltage of the drivers.

An optical print head comprising:

• light emitting elements arranged in a line-shaped region;
• drivers corresponding one to one with the light emitting elements, the drivers for causing the light emitting elements to emit light;
• setters for outputting luminance signals that indicate to the drivers light emission amounts of the light emitting elements according to image data, wherein light emitted by the light emitting elements exposes a photoreceptor surface line by line;
• a detector for detecting a noise component superimposed on a luminance signal, on transmission circuitry for transmitting the luminance signal from a setter to a driver, in a state in which the setter is outputting the luminance signal;
• and
• a generator that, for each light emitting element due to emit light in a line subsequent to a line for which the detector detected the noise component, generates and causes a setter corresponding to the light emitting element to output an adjusted luminance signal such that the light emitting element emits a light emission amount according to the image data in a state in which the noise component detected by the detector is superimposed on the adjusted luminance signal,
• wherein the setter outputs sequentially to a plurality of drivers, the optical print head further comprising:
• a switcher provided on the transmission circuitry, for switching across the plurality of drivers, wherein
• the detector detects the noise component on the transmission circuitry from the setter to the switcher.