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    • 81. 发明授权
    • Semiconductor laser diode driving device and driving method
    • 半导体激光二极管驱动装置及其驱动方法
    • US06339579B1
    • 2002-01-15
    • US09287338
    • 1999-04-07
    • Yuichi KamiokaKenji KoishiYoshiyuki MiyabataNaoyuki NakamuraKenichi TateharaIkuo HidakaKiyoshi Nakamori
    • Yuichi KamiokaKenji KoishiYoshiyuki MiyabataNaoyuki NakamuraKenichi TateharaIkuo HidakaKiyoshi Nakamori
    • G11B700
    • G11B7/126H01S5/042H01S5/0683H01S5/0687
    • In an optical disc apparatus, a semiconductor SLD driving device is mounted on an optical pickup in order to realize a high speed switching of drive current for a semiconductor laser diode (SLD), necessary for recording data. The SLD is placed. within 5 cm from the SLD driving device. The driving device becomes a heat source due to driving current of the SLD, and increases a temperature of the optical pickup. Since the temperature rises proportionally to power consumption, power saving is required. A voltage supplied to the driving device is controlled to be a minimum level necessary for keeping the driving device still working on basic functions. The SLD driving device is mounted to the optical pickup, and this driving device handles N pieces of input signals for setting semiconductor laser power and N pieces of switch-timing-input-signals for selecting respective input signals. A supplied voltage is controlled so that a voltage supplied to the output section of the driving device is a minimum value necessary for keeping the output section still operating. A power source is placed outside of the pickup.
    • 在光盘装置中,半导体SLD驱动装置安装在光学拾取器上,以实现用于记录数据所需的用于半导体激光二极管(SLD)的驱动电流的高速切换。 放置SLD。 距离SLD驱动装置5厘米以内。 驱动装置由于SLD的驱动电流而成为热源,并且提高了光学拾取器的温度。 由于温度与功耗成比例上升,因此需要省电。 被提供给驱动装置的电压被控制为使驱动装置保持基本功能所必需的最低水平。 SLD驱动装置安装在光拾取器上,该驱动装置处理N条输入信号以设置半导体激光功率,并且N条开关定时输入信号用于选择各个输入信号。 控制供电电压,使得提供给驱动装置的输出部分的电压是保持输出部分仍然工作所需的最小值。 电源放置在拾音器外面。
    • 85. 发明授权
    • Semiconductor laser drive circuit with peak detection and control
    • 具有峰值检测和控制的半导体激光驱动电路
    • US4701609A
    • 1987-10-20
    • US758807
    • 1985-07-25
    • Kenji KoishiTamotsu Matsuo
    • Kenji KoishiTamotsu Matsuo
    • G11B7/125G11B7/126H01S5/068H01S5/0683G01V1/32
    • G11B7/126H01S5/06832
    • A semiconductor laser drive circuit functioning as a light source of an optical recording/reproducing apparatus using an optical disk. In the recording mode, the input light of a semiconductor laser is modulated by a recording signal, the output light of the semiconductor laser is detected as a monitor signal by a photo sensitive device, the peak value of this monitor signal is held by a peak-hold circuit, a differential compensation control signal is obtained from the output of the peak-hold circuit and is fed back, and a photo control system to control the output light to a constant level is constituted, thereby controlling in such a way that the output light of the semiconductor laser becomes a certain constant modulation amplitude. Even upon recording, the output light can be stably controlled within a wide temperature range even if the characteristic of the semiconductor laser changes with the elapse of time. Also, this drive circuit can be realized by a simple arrangement.
    • 作为使用光盘的光记录/再现装置的光源的半导体激光驱动电路。 在记录模式中,通过记录信号调制半导体激光器的输入光,通过光敏元件将半导体激光器的输出光检测为监视信号,该监视信号的峰值保持峰值 在由峰值保持电路的输出获得差分补偿控制信号的情况下,反馈,构成控制输出光到恒定电平的光控制系统, 半导体激光器的输出光变成一定的调制幅度。 即使在记录时,即使半导体激光器的特性随着时间的推移而变化,也可以在宽的温度范围内稳定地控制输出光。 此外,该驱动电路可以通过简单的布置来实现。