Fuji Xerox Co., Ltd.

Kunihiro Maie

Kouji Tsutsumi

Masato Mikami

Shingo Yano

Yukio Suzuki

Teruo Kaneko

Naoki Honma

An image forming apparatus capable of forming wide images, includes: an exposing unit having a plurality of LED (light-emitting diode) heads arranged alternately in a main scanning direction, in which the resolution of an LED row formed in at least one of the plurality of LED heads is higher than the resolution of image data in a main scanning direction; and a lighting control unit that controls to turn on or turn off dots in the LED row such that the exposing position of a photoconductive drum is moved in the unit of dots of the high resolution LED row.

Image forming apparatus

An image forming apparatus utilizing a light-emitting diode (LED). The image forming apparatus includes: an LED head including an LED array that has a plurality of dots, in which a resolution a (dpi) of the LED array and a resolution b (dpi) in a main scanning direction at an image data exposure satisfy a relation: a&#x3e;b (a being an integral multiple of b); and a lighting control unit that performs a lighting control for the LED head such that main dots used for an exposure are turned on in every {(a/b)&#x2212;1} dots.

An image forming device, comprising: a cylindrical rotatable photoreceptor rotatably supported by an apparatus body; an exposure device in which plural exposure heads which expose an outer circumferential surface of the rotatable photoreceptor are disposed in a common housing in such a manner that exposure sections thereof are consecutively positioned; and a supporting unit having a position adjusting mechanism for adjusting a posture of the exposure device in at least two locations, which supports the exposure device and which is fixed on the apparatus body.

Image forming device

Two temperature areas are set at a higher temperature side and at a lower temperature side of target temperature respectively. The power stage of the temperature areas at the higher temperature side is set to &minus;1 and the power stage of the temperature areas at the lower temperature side is set to &plus;1. Thus, a current value is varied little and generation of flicker can be reduced. Further, A temperature can be always converged into the target temperature. When a temperature is in a temperature area near to the target temperature, the power stage is maintained except for a case in which a temperature has passed through a temperature area other than this near temperature area and the target temperature area and enters this near temperature area for the first time. Thus, an amplitude of power can be suppressed.

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Saitama, Japan

Kunihiro Maie