发明授权
- 专利标题: Image forming apparatus and image density detecting method
- 专利标题(中): 图像形成装置和图像浓度检测方法
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申请号: US13415082申请日: 2012-03-08
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公开(公告)号: US08654419B2公开(公告)日: 2014-02-18
- 发明人: Susumu Miyazaki , Izumi Kinoshita , Motohiro Kawanabe , Takeshi Shikama , Takuhei Yokoyama , Tatsuya Miyadera
- 申请人: Susumu Miyazaki , Izumi Kinoshita , Motohiro Kawanabe , Takeshi Shikama , Takuhei Yokoyama , Tatsuya Miyadera
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Limited
- 当前专利权人: Ricoh Company, Limited
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2011-051495 20110309
- 主分类号: H04N1/46
- IPC分类号: H04N1/46
摘要:
An image forming apparatus performs pseudo gradation processing using dithering, and includes an image carrier; a plurality of light-emitting element arrays arranged in a main-scanning direction and including a plurality of light-emitting elements; an image forming unit performing lighting control of the arrays and forming a pattern image on the image carrier; a detecting unit detecting a density of the pattern image; a position detecting unit detecting a position in the main-scanning direction of the detecting unit with respect to the light-emitting element arrays; a determining unit that, based on the detected position, determines whether the detecting unit is positioned at a proper detection position with respect to the pattern image on which noise has no effect; and an operation control unit that, when the detecting unit is positioned at the proper detection position, performs an image density detection operation on the pattern image using the detecting unit.