发明授权
- 专利标题： Light source drive, optical information recording apparatus, and optical information recording method
- 专利标题（中）： 光源驱动器，光信息记录装置和光信息记录方法
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申请号： US11213829申请日： 2005-08-30
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公开(公告)号： US07193957B2公开(公告)日： 2007-03-20
- 发明人: Naruhiro Masui , Hidetoshi Ema
- 申请人： Naruhiro Masui , Hidetoshi Ema
- 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： Dickstein Shapiro LLP
- 优先权： JP2002-194161 20020703; JP2002-218559 20020726; JP2003-164054 20030609
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacitance occurring in parallel to the light source for a predetermined time period near at least one of a rising-up part and a decaying-down part of a waveform of a drive current for the light source; and an addition/subtraction part which adds to or subtracts from the drive current the superposition current generated by the superposition current generation part.
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