An image forming apparatus includes a panel member opposing a photoreceptor and having plural light-emitting elements. The panel member has plural element groups, in which the light-emitting elements are arranged in a main scanning direction along a rotation axis of the photoreceptor. In the element group, the adjacent light-emitting elements in the main scanning direction are disposed such that positions in a sub-scanning direction orthogonal to the main scanning direction are shifted from one end side to the other end side toward one side in the main scanning direction. Density correction is performed to lower density of pixels when the pixels adjacent to each other in the main scanning direction and corresponding to the light-emitting element on one end side arranged at one end in the sub-scanning direction and the light-emitting element on the other end side arranged at the other end in the sub-scanning direction are exposed to light.

A light emitting device is provided that includes a substrate with a light emitting region in which light emitting elements are arranged, the light emitting region extending in a longitudinal direction; a processor configured to process a data signal for controlling the light emitting elements in accordance with a clock signal; and terminals aligned in the longitudinal direction. The terminals include a first terminal, a second terminal, and a third terminal. The second terminal and the third terminal are arranged adjacent to each other. The processor and the terminals are arranged in the longitudinal direction. The second terminal is supplied with one of the clock signal and the data signal. The third terminal is supplied with one of another clock signal and data signal.

An image forming apparatus includes a main body having a first surface and a second surface, a first photosensitive member which is arranged inside of the main body, and is configured to bear a first toner image, a first exposure portion which is arranged inside of the main body, and is configured to expose the first photosensitive member with light, a second photosensitive member which is arranged inside of the main body, and is configured to bear a second toner image, a second exposure portion which is arranged inside of the main body, and is configured to expose the second photosensitive member with light, a controller which is arranged on the first surface of the main body, and is configured to transmit a first control signal for controlling the first exposure portion and a second control signal for controlling the second exposure portion.

A light emitting device includes a plurality of light emitting elements arranged on a main surface of a substrate in M columns and N rows (M and N are integers of one or more), and a plurality of pixel drive circuits arranged in M columns and N rows and configured to drive a corresponding light emitting element among the plurality of light emitting elements. The N rows and M columns extend in a first and second directions, respectively. A first array pitch of a first light emitting element and a second light emitting element adjacent to each other in the first direction parallel to the N rows among the plurality of light emitting elements is different from a second array pitch of a first pixel drive circuit and a second pixel drive circuit adjacent to each other in the first direction among the plurality of pixel drive circuits.

An image forming apparatus includes a main body, a first photosensitive member which is arranged inside of the main body, and is configured to bear a first toner image, a first exposure unit which is arranged inside of the main body, and is configured to expose the first photosensitive member with light, a controller configured to transmit a first control signal for controlling the first exposure portion, and a relay unit configured to relay the first control signal transmitted from the controller, to transmit the first control signal to the first exposure portion, wherein the relay unit includes a semiconductor device, and wherein a power line is connected to the relay unit, the power line being configured to supply electric power to the semiconductor device.

An exposure head includes a substrate on which light sources are mounted, and a condensing optical system. A memory stores a profile indicating correction gains for exposure amounts. A sensor detects a temperature. A processor acquires a correction gain that corresponds to a position of a light source that reached an exposure timing, corrects, for each of the light sources, an exposure amount of the light source with the correction gain corresponding to the position of the light source, and adjusts, for each of the light sources, a reference position of the corresponding correction gain in the profile in accordance with the temperature detected by the sensor.

An image forming apparatus that forms a toner image by superimposing toner layers on an intermediate transfer member and transfers the formed toner image onto a recording medium, the image forming apparatus including a hardware processor that performs specific control for reducing, relative to a volume of a single-layer toner image to be transferred onto the recording medium when the single-layer toner image including a single-color toner layer is formed, a volume of a lowermost toner layer with a color same as a color of the single-color toner layer in a multilayer toner image to be transferred onto the recording medium when the multilayer toner image is formed by superimposing toner layers of a plurality of colors having a pattern same as a pattern of the single-layer toner image.

A light scanning apparatus according to the present disclosure includes a deflecting unit deflecting a light flux from a light source to scan a surface in a main scanning direction, a first optical system guiding the light flux deflected by the deflecting unit to the surface to be scanned at a first timing, and a second optical system guiding the light flux deflected by the deflecting unit to a light receiving element at a second timing different from the first timing, in which the second optical system includes a first optical element which has a diffracting surface and condenses the light flux deflected by the deflecting unit at the second timing in a main scanning cross section, and a value of a diffractive power of the first optical element is equal to or larger than a value of a refractive power thereof in the main scanning cross section.

A light emitting device includes: plural resistance elements having different resistance values; plural light emitting elements including anode terminals to which a reference potential is applied, and cathode terminals connected to first ends of the plural resistance elements in common; a turn-on instructor configured to sequentially output turn-on instruction signals to the plural light emitting elements to sequentially turn ON the plural light emitting elements; a turn-on potential applier configured to apply a turn-on potential for turning ON the plural light emitting elements; and a switching circuit configured to switch connection states between second ends of the plural resistance elements and the turn-on potential applier.

An image forming apparatus includes an image forming portion, an image formation processing portion, and an adjustment processing portion. The image forming portion includes an image carrier on which an electrostatic latent image is formed and a developing portion configured to use toner to develop the electrostatic latent image formed on the image carrier, and forms an image on the sheet conveyed by the sheet conveying portion. The image formation processing portion executes image formation processing for forming an image on each of the sheets sequentially conveyed using the image forming portion at any of a plurality of predetermined image forming speeds. The adjustment processing portion executes adjustment processing for adjusting an image quality of an output image output by the image forming portion each time an execution timing common to the plurality of image forming speeds arrives during the execution of the image formation processing.