- 专利标题: Exposure apparatus for image formation and image formation method
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申请号: US09826199申请日: 2001-04-04
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公开(公告)号: US06433803B1公开(公告)日: 2002-08-13
- 发明人: Yoshinori Mutou , Tetsuro Toyoshima , Tadashi Iwamatsu , Nobuyuki Azuma , Yoshinori Nakajima
- 申请人: Yoshinori Mutou , Tetsuro Toyoshima , Tadashi Iwamatsu , Nobuyuki Azuma , Yoshinori Nakajima
- 优先权: JP2000-107058 20000407
- 主分类号: B41J2385
- IPC分类号: B41J2385
摘要:
An exposure apparatus for image formation uses power control means provided to a laser driver for controlling exposure energy and accordingly forming an image. Specifically, exposure energy is varied depending on an isolated-dot pattern and an isolated-line pattern by changing the pulse height (drive power) of a drive pulse for each dot. Both of the isolated-line and isolated-dot patterns of a high resolution can thus be reproduced with a high image quality without increase of cost due to requirements for accuracy in processing and positioning of a lens and without decrease of life of a photoreceptor due to a decreased thickness of its photosensitive layer.