Invention Grant
US07782355B2 Image forming apparatus using a plurality of lasers with a varying exposure ratio
有权
使用具有不同曝光比的多个激光器的图像形成装置
- Patent Title: Image forming apparatus using a plurality of lasers with a varying exposure ratio
- Patent Title (中): 使用具有不同曝光比的多个激光器的图像形成装置
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Application No.: US12118986Application Date: 2008-05-12
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Publication No.: US07782355B2Publication Date: 2010-08-24
- Inventor: Makoto Oki
- Applicant: Makoto Oki
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2007-128637 20070514
- Main IPC: B41J2/47
- IPC: B41J2/47
Abstract:
An electrostatic latent image is formed by exposing the same exposure point on a photosensitive drum to a laser beam having an emission wavelength of 420 nm and a laser beam having an emission wavelength of 780 nm. The exposure is performed in a pulse-height modulation manner by changing a total output of these two laser beams to write the electrostatic latent image while changing an output ratio between the two laser beams depending on the total output.
Public/Granted literature
- US20080285991A1 IMAGE FORMING APPARATUS Public/Granted day:2008-11-20
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