Fuji Xerox Co., Ltd.

Toshio Hisamura

Osamu Yasui

Yasuhiro Arai

Hirokazu Tsubota

Atsushi Ugajin

Fumihiko Ogasawara

Masaki Fujise

Michio Taniwaki

Yoshitake Matsubara

Ken Tsuchiya

Satoshi Kurashima

Michihiro Inoue

Yoshiki Matsuzaki

Tsutomu Udaka

Ryo Ando

Kozo Tagawa

Kenji Koizumi

Kazuhiro Hama

Toshiki Matsui

An exposure device includes a plurality of light-emitting elements, a lighting driver, a first storage, a reader, a shading correction unit and a second storage. The lighting driver drives and lights up the light-emitting elements based on image data. The first storage stores light amount unevenness correction values of the respective light-emitting elements. The reader reads the light amount unevenness correction values stored in the first storage. The shading correction unit executes shading correction for the light amount unevenness correction values read by the reader. The second storage stores correction values obtained by having the shading correction unit to execute the shading correction for the light amount unevenness correction values. The lighting driver controls light power of the respective light-emitting elements based on the correction values stored in the second storage.

Exposure device, image forming apparatus, exposure control method and computer-readable medium

An image formation system includes a medium-pattern-information-read-unit that reads pattern information of a surface of a medium; a pattern-information-image-creation-unit that creates a pattern Information image based on the read pattern information; and a print unit that adds the pattern information image to a print image to be printed on the surface of the medium and prints the print image on the medium.

Image formation system adding pattern information to print image based on read pattern information from medium surface for determining if medium is original

An image forming apparatus includes a paper fiber reading unit that reads fiber properties of a paper sheet; an encryption unit that encrypts at least a part of an input image based on the fiber properties read by the paper fiber reading unit; and a printing unit that prints an encrypted image portion encrypted by the encryption unit and an image including information representing the fiber properties read by the paper fiber reading unit on the paper sheet whose fiber properties are read by the paper fiber reading unit.

Encrypting image data based on paper fiber properties, printing encrypted image, and decrypting encrypted image

An exposure device includes plural light emitting elements that light in turn for exposure, plural driving elements that drive each of the light emitting elements and a time changing member that changes one time period of a switching signal to switch light emitting elements driven by the driving elements among the plurality of light emitting elements in turn from a reference time, depending on an image forming speed, wherein the time changing member changes the one time period from the reference time for some of the light emitting elements during one main scan, and maintains the one time period as the reference time for the remaining light emitting elements.

Exposure device, image forming apparatus and computer readable medium storing program for exposure control

A serial signal receiving device, includes: a serial-parallel converter that converts a transmitted serial signal into a parallel signal, wherein the serialized signal is obtained by the plural signal; a storage unit that stores phase difference information indicating a phase difference among the plural signals; and a correcting unit that corrects a phase relation among the plural signals of the parallel signal output from the serial-parallel converter based on the phase difference information stored by the storage unit.

Serial signal receiving device, serial transmission system and serial transmission method

An image-forming device which is equipped with an image-holding member, an exposure section provided with plural light-emitting portions arranged in a first direction, a movement section that relatively moves the exposure section and the image-holding member in a second direction that intersects with the first direction, and a light-emission control section. The light-emission control section causes the plural light-emitting portions to periodically emit light in accordance with image data representing an image that is to be formed on the image-holding member, to form the image on the image-holding member. The light-emission control section varies a light-emission period during formation of the image, so as to correct for periodic fluctuations within the image of at least one of density and magnification ratio in the second direction.

Image formation device and method for correcting periodic variations

An image forming apparatus includes an image forming unit which forms an image on a recording medium, a post-processing unit which performs a post-processing on the recording medium on which the image is formed by the image forming unit, and a post-processing controller which controls the post-processing unit according to whether an image requested by a user or a test image is formed on the recording medium. An image forming method includes, in a case where the requested image and the test image are formed on plural recording media, controlling the post-processing according to whether the requested image or the test image is formed on the recording medium, and according to the control, performing the post-processing on the recording medium on which the requested image or the test image is formed.

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Ebina, Japan

Toshio Hisamura