发明授权
US07480320B2 Semiconductor laser driving device, semiconductor laser driving method, and image forming apparatus using semiconductor laser driving device
失效
半导体激光驱动装置，半导体激光驱动方法以及使用半导体激光驱动装置的图像形成装置
- 专利标题： Semiconductor laser driving device, semiconductor laser driving method, and image forming apparatus using semiconductor laser driving device
- 专利标题（中）： 半导体激光驱动装置，半导体激光驱动方法以及使用半导体激光驱动装置的图像形成装置
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申请号： US10531755申请日： 2003-10-29
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公开(公告)号： US07480320B2公开(公告)日： 2009-01-20
- 发明人: Hiroaki Kyougoku , Junichi Ikeda
- 申请人： Hiroaki Kyougoku , Junichi Ikeda
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd
- 当前专利权人： Ricoh Company, Ltd
- 当前专利权人地址： JP Tokyo
- 代理机构： Cooper & Dunham, LLP.
- 优先权： JP2002-318108 20021031
- 国际申请： PCT/JP03/13843 WO 20031029
- 国际公布： WO2004/040721 WO 20040513
- 主分类号： H01S3/00
- IPC分类号： H01S3/00
摘要：
In a semiconductor laser driving device and method, a first current below an oscillation threshold current of a semiconductor laser is outputted to the laser invariably. A second current needed for light emission of the laser responsive to an input signal is outputted to the laser. A third current for controlling the laser such that a detected amount of emission light from the laser accords with a given value is outputted to the laser. A predetermined auxiliary current is outputted to the laser. An initialization operation is performed to detect luminescence characteristics of the laser, and a signal indicating a value of the second current derived from the detected luminescence characteristics is outputted. The third current is controlled so that an amount of light outputted by the laser receiving a sum of the first, second, third and auxiliary currents, accords with a predetermined amount.
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