Title:
光源駆動装置、光走査装置及び画像形成装置
Document Type and Number:
Japanese Patent JP5402072
Kind Code:
B2
Abstract:
In a light-source driving device, a high-frequency clock generating circuit generates two high-frequency clock signals having mutually different phases, an image-data creating circuit creates a plurality of image data corresponding to a plurality of light-emitting units according to image information, and a write control circuit creates a plurality of modulated data corresponding to the light-emitting units from the plurality of image data and separately controls output timings of the plurality of modulated data by using a time, as a unit, corresponding to a phase difference between the two high-frequency clock signals. The write control circuit includes two data switching circuits that set a correspondence relation between image data and PWM data based on one of a relation between an array of the light-emitting units and an array of a plurality of light spots and a relation between a surface to be scanned and a main scanning direction.
Inventors:
Yasuatsu Nihei
Masaaki Ishida
Junji Omori
Masaaki Ishida
Junji Omori
Application Number:
JP2009038974A
Publication Date:
January 29, 2014
Filing Date:
February 23, 2009
Export Citation:
Assignee:
Ricoh Co., Ltd.
International Classes:
B41J2/44; G02B26/10; G03G15/04; H04N1/113
Attorney, Agent or Firm:
Tokuji Tateishi