Semiconductor laser device

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	Semiconductor laser device
其他题名	Semiconductor laser device
	KAKU TOSHIMITSU; SHIGEMATSU KAZUO
	1988-04-20
专利权人	HITACHI LTD
公开日期	1988-04-20
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To execute high frequency driving only at the time of reproducing and suspending the high frequency driving in recording and erasing modes to expand the life of a semiconductor laser by controlling a switching circuit connected between a semiconductor laser and a high frequency oscillation circuit by an optical disk device mode control signal. CONSTITUTION:The semiconductor laser 1 of the optical disk is directly connected to a high frequency superposing circuit 2 and the periphery of the circuit 2 is electromagnetically shielded 3 to suppress the radiation of electromagnetic waves to the external. A control signal indicating a recording/reproducing/ erasing mode and a data signal at the time of recording are sent from a controller 4 to a laser driving circuit 5 for controlling the circuit 2. The circuit 5 adds the data obtained at the time of recording, and the mode signal obtained at the time of erasing to DC current obtained at the time of reproducing to form a laser driving signal. The circuit 2 is constituted of a high frequency oscillation circuit 10 and a switching circuit 20 for turning on/off the high frequency signal with a mode control signal to execute high frequency driving only at the time of reproducing and suspend the high frequency driving at the time of recording and erasing modes.
其他摘要	目的：仅在再现和暂停高频驱动的记录和擦除模式时执行高频驱动，以通过控制连接在半导体激光器和高频振荡电路之间的开关电路来延长半导体激光器的寿命。光盘设备模式控制信号。组成：光盘的半导体激光器1直接连接到高频叠加电路2，电路2的外围被电磁屏蔽3，以抑制电磁波辐射到外部。表示记录/再现/擦除模式的控制信号和记录时的数据信号从控制器4发送到激光器驱动电路5，用于控制电路2.电路5加上记录时获得的数据。以及在擦除时在再现时获得的DC电流获得的模式信号，以形成激光器驱动信号。电路2由高频振荡电路10和开关电路20构成，开关电路20用于利用模式控制信号接通/断开高频信号，以仅在再现时执行高频驱动并且暂停高频驱动。录制和删除模式的时间。
申请日期	1986-10-03
专利号	JP1988090037A
专利状态	失效
申请号	JP1986234606
公开（公告）号	JP1988090037A
IPC 分类号	G11B7/125 \| H01S5/042 \| H01S3/096
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/181661/68892
专题	半导体激光器专利数据库
作者单位	HITACHI LTD
推荐引用方式 GB/T 7714	KAKU TOSHIMITSU,SHIGEMATSU KAZUO. Semiconductor laser device. JP1988090037A[P]. 1988-04-20.

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