Ricoh Company, Ltd.

Nec Corporation

Sony Corporation

Kabushiki Kaisha Square Enix

Nec C Orporation

Copyer Co., Ltd.

Kazumi Kobayashi

Shin Hasegawa

Takashi Enami

Shinji Kato

Kohta Fujimori

Kayoko Tanaka

Nobutaka Takeuchi

Naoto Watanabe

Shinji Kobayashi

Hitoshi Ishibashi

Yushi Hirayama

Fukutoshi Uchida

Osamu Ariizumi

Ryohta Morimoto

Yoshihiko Hirai

Hiroaki Matsuyama

Kiichirou Shimizu

Masayoshi Suzuki

Hideya Murai

Noboru Sawayama

Toshiya Ishii

Yuushi Hirayama

Makoto Yasuda

Daisuke Inoue

Manabu Izumikawa

Hiroki Yamamura

Shingo Shiramura

Atsushi Saitoh

Shiho Shimosaka

Shohgo Takeuchi

Michiaki Sakamoto

Yuji Yamamoto

Hitoshi Yamamoto

Tadashi Kasai

Mamoru Okamoto

Emiko Shiraishi

Hiroyuki Kunii

Kunio Hasegawa

Shinichi Nakata

Kazuaki Kamihara

Takamasa Ozeki

Masayoshi Nakayama

Kouta Fujimori

Kohei Matsumoto

Masaki Sukesako

Masakazu Terao

Masaki Satou

Mutsuki Morinaga

Takuma Higa

Yuichi Aizawa

Jun Hitosugi

Wakana Itoh

Yuji Hirayama

Takatsugu Komori

Hideki Kamaji

Masahiro Katoh

Kayoko Ikegami

Hajime Kikuhara

Kiichiro Shimizu

An image forming apparatus includes an image forming device to form a correction image, an image density detector to detect image densities of a plurality of areas in the correction image, and circuitry to correct an image formation condition of the image forming device based on detected image densities of the plurality of areas. The circuitry replaces a detected image density of an area of interest selected from the plurality of areas with an average value of detected image densities of two or more areas including adjacent areas adjacent to the area of interest and corrects the image formation condition of the image forming device based on the detected image densities of the plurality of areas after replacement when a difference between the detected image density of the area of interest and at least one of the detected image densities of the adjacent areas exceeds a predetermined threshold.

Image forming apparatus

There is provided an illumination unit including a light emitting device with a coupling surface, the light emitting device including a terminal provided on the coupling surface, a holding member that houses the light emitting device, a wiring substrate that is provided separately from the coupling surface of the light emitting device and is electrically coupled with the terminal, and a heatsink that includes an adjacent part adjacent to the coupling surface of the light emitting device.

Illumination unit and display apparatus

An image forming apparatus includes a latent image bearer; a developing device containing two-component developer and including a developer bearer, a development voltage source, and a toner concentration detector; a toner supply device to supply toner to the developing device; a transfer device; and a controller to keep a toner concentration in the developer in the developing device at a target toner concentration during image formation. The controller executes forced toner consumption in which the developing device supplies the toner to the latent image bearer the toner at a predetermined forced toner consumption timing, while inhibiting the toner supply device from supplying toner. When the toner concentration falls to a prescribed toner density lower than the target toner concentration, the controller completes the forced toner consumption and executes a post-consumption toner supply operation.

An image forming device includes: an endless transport belt in which a plurality of through holes are formed, the transport belt circulating to carry sheets; a recording head with a plurality of nozzles through which ink droplets are discharged, the nozzles being arranged in a width direction of the transport belt. The image forming device performs preliminary discharge of ink droplets in which the ink droplets discharged through the nozzles pass through the through holes. The image forming device further includes: a sensor that detects an element to be detected formed on the transport belt when the transport belt circulates; and a preliminary discharge control unit that controls timings of discharge of ink droplets through the nozzles in the preliminary discharge based on a plurality of results of detecting the elements to be detected given from the sensor.

Image forming device and method for controlling discharge of ink droplets based on sensor detection

An image forming apparatus includes a recording head having nozzles to form an image by squirting droplets onto a recording medium, a transfer member transferring the recording medium and having holes which allows passage of droplets squirted by the recording head for non-printing discharge, an area detecting unit to detect a plurality of non-printing discharge areas that are areas between adjacent recording media, and a non-printing discharge instructing unit to cause the nozzles to perform non-printing discharge such that all the nozzles perform non-printing discharge at least once in the non-printing discharge areas.

Image forming apparatus performing non-printing discharge

An image forming apparatus includes an image carrying member, an image forming mechanism, an optical sensor, and a controller. The image forming mechanism performs an image forming operation for forming a reference toner image on the image carrying member under a specific setting associated with the image forming mechanism. The optical sensor is arranged in a vicinity to the image carrying member. The controller performs an optical toner test for checking, by using the optical sensor, optical characteristics of the reference toner image formed on the image carrying member and to adjust the specific setting based on a result of the optical toner test.

Image forming apparatus capable of reducing a lengthy duration of an adjustment control

In an image forming apparatus, when photosensitive membersY,M,C are in contact with a transfer belt, then color adjustment is performed. When the photosensitive membersY,M,C are not in contact with a transfer belt, i.e., only a photosensitive memberBk is in contact with the transfer belt, then only black adjustment is performed.

Image forming apparatus and image density adjusting method

An image forming apparatus, which comprises a toner density detection device for detecting the density of a toner inside a developing device, acquires the number of pixels from inputted image information, calculates the toner replenishment amount from the toner density detection value and the information on the pixels, and thereby performs replenishment control so that excessive replenishment or insufficient replenishment of the toner is not caused. The upper limit value of the amount of toner to be replenished at once to the developing device is changed in accordance with the amount of information on an input image such as the image area, pixels of the input image.

Toner replenishment determination device of an image forming apparatus

In an image forming apparatus a developing device develops an electrostatic latent image on an image carrier with a developer that contains toner to obtain a toner image, a toner-amount detecting unit detects amount of toner attached to the toner image, and a toner-density detecting unit detects a density of toner in the developer. Moreover, a process control unit corrects a toner-density target value indicative of a target value of density of toner in the developer based on the amount of toner detected by the toner-amount detecting unit and the density of toner detected by the toner-density detecting unit, and a determines execution timing of next process based on corrected toner-density target value.

Image forming apparatus for correcting a toner density target value

An optical pickup includes: a first light source that emits a first linearly polarized light beam; a second light source that emits a second linearly polarized light beam different from the first wavelength; a drive unit configured to selectively drive the light sources; a first light path along which the first light beam travels to an optical disk; a second light path along which the second light beam travels to the optical disk, the first and second light paths intersecting in the middle of the light paths and are combined into a third light path; a light path-combining optical element provided at the intersection of the first and second light paths; a light path-separating optical element provided along the third light path; a phase difference-imparting optical element provided along the third light path; and a light receiving element that receives the first and second light beams reflected off the optical disk.

Optical pickup and optical disk apparatus

A central position of each character participating in a battle is obtained as a fixation point, and multiple temporary points are set on a hemisphere around the fixation point. Each temporary viewpoint position is set on a straight line connecting the fixation point to each temporary point. Each temporary viewpoint position is a position from which all characters can be projected on a virtual screen when perspective transformation is executed at a predetermined visual angle and a distance to the fixation point is shortest. Points are given to each temporary viewpoint position based on the result of a distance evaluation, an angle evaluation, an overlap evaluation, and a height difference evaluation. The top scoring temporary viewpoint positions are selected as positions where the viewpoint of a virtual camera should be moved.

Virtual camera control method in three-dimensional video game

An image forming apparatus includes a plurality of image carriers, an image forming mechanism, a seamless belt-like intermediate transfer body or a transfer material carrier, a detection mechanism, and an optical detecting apparatus. The optical detecting apparatus includes at least a printed board, and a plurality of photodetectors formed of a light-emitting element, a light-receiving element and light-shielding members, which are mounted on the printed board. The optical detecting apparatus is disposed such that it detects a belt surface adjacent to rollers of the intermediate transfer body or the transfer material carrier, and either displacement of a transfer image or image density is detected by a plurality of photodetectors detecting pattern images which are transferred from the plurality of image carriers to the image transfer body or the transfer material carrier.

Method and apparatus for image forming capable of accurately detecting displacement of transfer images and image density

An image forming apparatus in which a predetermined image density can be obtained by correcting a toner density control target value without consuming toner. The output value Vt of the magnetic permeability sensor and the target output value Vtare compared, and the toner density is controlled by controlling a powder pump on the basis of the comparative result thereof so that the output value Vt approximates the target output value Vt. In addition, the target output value Vtis corrected on the basis of the detected result of the image coverage ratio so as to maintain a predetermined development potential of the development apparatus. By virtue of this, even when image forming that involves a significant change in the toner replacement amount in the development apparatus is performed, for example, even when an image of high image coverage ratio is output, the toner density is adjusted to maintain the development capability at a constant, and a predetermined image density is ensured. Moreover, because the image coverage ratio can be detected without consuming toner, toner does not need to be consumed when the target output value Vtis corrected.

Image forming apparatus with a two component developer, toner density detection and toner density correction

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Tokyo, Japan

Kazumi Kobayashi