发明授权
- 专利标题： Driving circuit of driving light-emitting device
- 专利标题（中）： 驱动发光装置的驱动电路
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申请号： US11961733申请日： 2007-12-20
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公开(公告)号： US07902906B2公开(公告)日： 2011-03-08
- 发明人: Hiroyuki Nakamura
- 申请人： Hiroyuki Nakamura
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2007-006175 20070115; JP2007-298401 20071116
- 主分类号： G05F1/10
- IPC分类号： G05F1/10
摘要：
A light-emitting device driving circuit capable of reliably performing emission control on a light-emitting device of a low emission threshold (about 10 mA or less) and capable of correcting a distortion due to the Early effect of a transistor in the drive current supplied to the light emitting device. The light limiting device driving circuit includes a current control unit (101) which controls the value of a main current based on a control voltage, a bias current source (CC1) for subtracting a bias current from the main current, and a switching unit (103) which controls emission of light from the light-emitting device by switching, based on the drive signal, a current obtained by subtracting the bias current from the main current or a current based on the current obtained by the subtraction.
公开/授权文献
- US20080169771A1 DRIVING CIRCUIT OF DRIVING LIGHT-EMITTING DEVICE 公开/授权日：2008-07-17
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