Laser driver circuit and optical disc device including the laser driver circuit

OPT OpenIR > 半导体激光器专利数据库

	Laser driver circuit and optical disc device including the laser driver circuit
其他题名	Laser driver circuit and optical disc device including the laser driver circuit
	KURODA, KAZUTO
	2008-03-06
专利权人	KABUSHIKI KAISHA TOSHIBA
公开日期	2008-03-06
授权国家	美国
专利类型	发明申请
摘要	In order to compute a set value for a laser driver circuit for obtaining laser light having a predetermined irradiation power by using a calibration coefficient indicating manufacturing errors. In an optical disc device including a laser driver circuit according to the present invention, a laser diode emits laser light, a front monitor photo diode receives the emitted laser light to generate a reception light signal, an APC unit of the laser driver circuit compares the thus generated reception light signal with a target value related to the predetermined irradiation power previously set in the laser light to be emitted, a drive of the laser diode is controlled to match the signal to the target value, and a CPU uses at least one calibration coefficient to compute the set value for matching the reception light signal to the target value.
其他摘要	为了通过使用指示制造误差的校准系数来计算用于获得具有预定照射功率的激光的激光驱动器电路的设定值。在包括根据本发明的激光驱动器电路的光盘装置中，激光二极管发射激光，前监视器光电二极管接收发射的激光以产生接收光信号，激光驱动器电路的APC单元比较这样产生的接收光信号具有与预先在发射的激光中设定的预定照射功率相关的目标值，控制激光二极管的驱动以使信号与目标值匹配，并且CPU使用至少一个校准计算用于使接收光信号与目标值匹配的设定值的系数。
主权项	A laser driver circuit, comprising: a light emitting unit configured to emit laser light; a light receiving unit configured to receive the laser light emitted from the light emitting unit and to generate a reception light signal; and a control unit configured to compare the reception light signal generated by the light receiving unit with a target value related to an irradiation power previously set for the laser light emitted from the light emitting unit and to control a drive signal of the light emitting unit so that the reception light signal matches the target value, wherein the control unit configured to control the light emitting unit so that the reception light signal matches the target value on the basis of a set value which is computed by using at least one calibration coefficient for matching the reception light signal to the target value.
申请日期	2007-08-30
专利号	US20080056086A1
专利状态	失效
申请号	US11/848045
公开（公告）号	US20080056086A1
IPC 分类号	G11B7/00
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/58119
专题	半导体激光器专利数据库
作者单位	KABUSHIKI KAISHA TOSHIBA
推荐引用方式 GB/T 7714	KURODA, KAZUTO. Laser driver circuit and optical disc device including the laser driver circuit. US20080056086A1[P]. 2008-03-06.