Canon Kabushiki Kaisha

Other

Takashi Kawana

Kaoru Seto

Atsushi Kashihara

Hiroshi Mano

Tetsuo Saito

Hiromichi Yamada

Hiroshi Sasame

Masaki Ojima

Masaharu Ohkubo

Hiroyuki Fukuhara

Michio Itoh

Seiji Uchiyama

Michio Ito

Yoshihiko Tanaka

Yuuji Takayama

Hikaru Uchidate

Shuichi Kurokawa

Hiroshi Atobe

Kazuyuki Ishihara

Kiyoshi Kanaiwa

Shinichiro Maekawa

Tetsuya Kobayashi

Akihiko Takeuchi

Hidenori Kanazawa

Daisuke Murata

Toru Kosaka

Kenichi Fujii

Satoshi Shimizu

Tatsuya Kobayashi

Takaaki Tsuruya

Minoru Hayasaki

Akihiko Uchiyama

Aoji Isono

Yoshiro Saito

Naoki Enomoto

Yoichiro Maebashi

Tomoyuki Okada

Haruo Fujii

Takashi Soya

Atsushi Shoji

Fumihiro Ueno

Shuhei Watanabe

Toshio Yoshimoto

Eiichiro Teshima

Yoshimi Ogasawara

Nobuyuki Uchiyama

Junya Kobayashi

Chihiro Shirakawa

Manabu Sakakibara

Makoto Abe

Manabu Takebayashi

An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.

Image-forming apparatus

An image forming apparatus includes a detection unit configured to detect a first scan beam from a first light source; and a control unit. The control unit performs corrections in which a light emission period of scan beams per pixel is changed in accordance with which section is scanned by the scan beams, and performs corrections in which a light exposure amount by which the photosensitive member is exposed to light by the scan beams is changed in accordance with which section in the main scanning direction is scanned by the scan beams. Based on a detection timing at which the detection unit has detected the first scan beam, the control unit controls scan start timings at which the scan beams start scanning of the photosensitive member.

Image forming apparatus that scans photosensitive member using plurality of scan beams

Image-forming apparatus for correcting a brightness of a laser light

An image forming apparatus includes: a scanning unit configured to form a latent image on a photosensitive member, wherein a scanning speed changes within a scan line; a control unit configured to perform correction control of a luminance and a light-emitting time of a light source; a holding unit configured to hold profile information indicating a change of the light spot due to an environment or due to a position of the pixel. The holding unit is further configured to hold scanning information indicating the light-emitting time of the light source or the luminance of the light source with respect to a pixel, for correcting a change in the scanning time of the pixel, and the control unit is further configured to perform the correction control based on the scanning information and the profile information.

Image forming apparatus and optical scanning apparatus for scanning photosensitive member with light spot

A pixel distance corrector configured to correct a pixel distance in the main scanning direction so that latent images corresponding to each pixel of image data are formed on the surface of the photosensitive member at substantially equal intervals in the main scanning direction. A controller configured to control a light source to emit light with a first light emission luminance with respect to an image part of the photosensitive member, and a second light emission luminance which is lower than the first light emission luminance, with respect to a non-image part of the photosensitive member. The controller is configured to correct light emission luminance so that the second light emission luminance decreases as the scanning speed decreases.

Image forming apparatus having light emission luminance based on scanning speed

The power supply apparatus includes a first capacitor and a second capacitor that insulate a primary side and a secondary side of the power supply apparatus from each other. The power supply apparatus further includes an inductor, a first switch element connected to the inductor and to the first capacitor, and a second switch element connected to the inductor and to the second capacitor. The power supply apparatus controls the first switch element and the second switch element so that, when the first switch element is turned on, the second switch element is turned on.

Power supply apparatus and image forming apparatus

An image forming apparatus for forming an image of multilevel image data includes a driving unit for driving an image forming element for image formation, an additional data generating unit for generating a digital signal string based on predetermined additional data, and an input unit for superposing a digital signal string related to the multilevel image data and the digital signal string based on the additional data and inputting the superposed digital signal string to the driving unit.

Image forming apparatus and image forming method

An image recording apparatus for recording image data from an external apparatus is provided, which receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.

Image recording apparatus which sends charasteristic/correction signals whenever new look-up table are selected or a pre-selected number of pages have been printed

An image forming apparatus includes an image bearing member, a container for containing a developer removed from the image bearing member, a detector for detecting an amount of developer removed from the image bearing member and contained in the container, and a failure detector for detecting a failure of the developer amount detector on the basis of the degree of use of the image bearing member and a detection result of the developer amount detector.

Image forming apparatus having means for detecting amount of developer used and means for detecting failure of used developer amount detecting means

A process cartridge removably mountable on a body of an image forming apparatus, includes an electrophotographic photosensitive member, a process device acting on the electrophotographic photosensitive member, and a memory storing therein information regarding the process cartridge. It is characterized in that the memory itself stores therein the frequency of writing of information into the memory.

Process cartridge and image forming apparatus on which the process cartridge is mountable

An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of a second, higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.

Dot image data output apparatus

An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of second higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.

Dot image output apparatus

Growing community of inventors

Yokohama, Japan

Takashi Kawana