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    • 4. 发明申请
    • AUTOMATIC POWER CONTROL FILTER CIRCUIT AND OPTICAL DISC DEVICE
    • 自动功率控制滤波电路和光盘设备
    • US20070183468A1
    • 2007-08-09
    • US11672198
    • 2007-02-07
    • Akira NAKAOTakashi INOUEYasuhiro HAYASHI
    • Akira NAKAOTakashi INOUEYasuhiro HAYASHI
    • H01S3/00
    • H01S5/06832G11B7/1263
    • An automatic power control filter circuit which outputs a signal corrected to make a laser drive current for driving a laser light emitting element irradiating an optical disc with a laser beam become a desired value, on the basis of a signal obtained by sampling and holding a light emission monitor signal corresponding to an output current of a photodetector for detecting output power of the laser light emitting element, has an offset adjusting circuit which measures and stores an offset voltage of the signal sampled and held when the laser is prevented from emitting light; a first operation circuit which performs offset correction by calculating the offset voltage stored in the offset adjusting circuit and the signal sampled and held when the laser is allowed to emit light; a second operation circuit which calculates an error by comparing a value corrected by the first operation circuit with a value obtained by multiplying a target value by a desired coefficient in order to perform optimum power control; an integrator which integrates the error calculated by the second operation circuit; and a third operation circuit which performs calculation of the output of the integrator and a voltage value obtained by multiplying a desired boost voltage value by the coefficient, and outputs the calculation result, wherein the target value and the boost voltage value are respectively multiplied by the coefficient at the same timing as the optimum power control is performed.
    • 基于通过采样和保持光获得的信号,输出校正为激光驱动电流的信号的自动功率控制滤波器电路,用于驱动用激光束照射光盘的激光发射元件,成为期望值 对应于用于检测激光发射元件的输出功率的光电检测器的输出电流的发射监视信号具有偏移调整电路,其测量并存储当防止激光发光时采样和保持的信号的偏移电压; 第一操作电路,通过计算存储在偏移调整电路中的偏移电压和当允许激光发光时采样和保持的信号来执行偏移校正; 第二操作电路,通过将由第一操作电路校正的值与通过将目标值乘以期望系数而获得的值来计算误差,以执行最佳功率控制; 积分器,其对由第二运算电路计算出的误差进行积分; 以及执行积分器的输出的计算的第三运算电路和通过将期望的升压电压值乘以系数而获得的电压值,并输出计算结果,其中目标值和升压电压值分别乘以 在与最佳功率控制相同的定时执行系数。
    • 6. 发明申请
    • ELECTRIC POWER TOOL
    • 电动工具
    • US20120241049A1
    • 2012-09-27
    • US13423831
    • 2012-03-19
    • Kazuya KATOTakuji KIMURAYasuhiro HAYASHIJun OTA
    • Kazuya KATOTakuji KIMURAYasuhiro HAYASHIJun OTA
    • B27C5/10
    • B25F5/02B25F5/008
    • In an electric power tool, a controller, a capacitor, a terminal stand, a speed change controller, and a switch are arranged at positions offset from the axis of a spindle so as not to overlap the spindle as seen in a direction corresponding to the direction in which the spindle axially extends. The controller, the capacitor, the terminal stand, the speed change controller, and the switch are located so as to overlap a part of a drive motor as seen in a direction orthogonal to the direction in which the spindle axially extends. The controller, the capacitor, the terminal stand, the speed change controller, and the switch are located so as to overlap at least a part of a field as seen in a direction corresponding to the direction in which the spindle axially extends.
    • 在电动工具中,控制器,电容器,端子架,变速控制器和开关被布置在从主轴的轴线偏移的位置处,以便在与主轴对应的方向上看不到时,与主轴重叠 主轴轴向延伸的方向。 控制器,电容器,端子架,变速控制器和开关被定位成在与主轴轴向延伸的方向垂直的方向上与驱动电动机的一部分重叠。 控制器,电容器,端子架,变速控制器和开关被定位成在与主轴轴向延伸的方向相对应的方向上看到的场的至少一部分重叠。