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Yoshinobu Takeyama

Ricoh

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Publication

Featured researches published by Yoshinobu Takeyama.

Recording Systems: High-Resolution Cameras and Recording Devices and Laser Scanning and Recording Systems | 1993

Integrated laser diode controller module for high-speed half-tone image printing

Masaaki Ishida; Hidetoshi Ema; Susumu Imagawa; Yoshinobu Takeyama

Achieving good halftone reproduction in laser printing requires multi-level modulation of laser diodes. We proposed a hybrid modulation method that is basically pulse-width modulation (PWM) supplemented by intensity modulation (IM). This method is implemented as an IC, resulting in a small, high-speed LD controller module that can be mass produced at comparatively low cost.

Archive | 1988

Synchronizing signal generating system for laser scanner

Susumu Imakawa; Yoshinobu Takeyama

Archive | 1988

Semiconductor laser output control circuit

Keiichi Sugimura; Yoshinobu Takeyama; Kazuyuki Shimada

Archive | 1998

Image forming apparatus selectively operating one of a plurality of developing units and a method for controlling a switching operation for the developing units

Yoshinobu Takeyama; Masanori Saitoh; Hideaki Kibune; Nobuyuki Yanagawa

Archive | 1998

Image forming apparatus with integrated rotatable image carrier and writing device and method of assembling the same

Masanori Saito; Nobuyuki Yanagawa; Yoshinobu Takeyama; Hideaki Kibune

Archive | 1992

Color image forming apparatus having means for properly superimposing image colors on each other

Yoshinobu Takeyama; Nobuaki Kubo; Susumu Imakawa; Norio Michiie

Archive | 1991

Beam recorder forming low density dots

Hidetoshi Ema; Hitoshi Hattori; Masaaki Ishida; Susumu Imakawa; Yoshinobu Takeyama

Archive | 2000

Image forming apparatus with an intermediate transfer body including reference markers for controlling the same

Yoshinobu Takeyama; Nobuyuki Yanagawa; Masanori Saito; Hideaki Kibune; Tomoyoshi Takeuchi; Masatoshi Tanaka; Norio Kawamoto

Archive | 1999

Image formation apparatus and method thereof

Yoshinobu Takeyama; Nobuyuki Yanagawa

Archive | 1999

Method of applying a bias voltage for image development and method of switching the bias voltage in an image forming apparatus

Yoshinobu Takeyama; Nobuyuki Yanagawa

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Nobuyuki Yanagawa

Ricoh

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Hideaki Kibune

Ricoh

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Masanori Saito

Ricoh

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Susumu Imakawa

Ricoh

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Hidetoshi Ema

Ricoh

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Koichi Kudo

Ricoh

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Masaaki Ishida

Ricoh

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Masanori Saitoh

Ricoh

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Natsumi Matsue

Ricoh

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Takashi Hashimoto

Ricoh

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