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    • 1. 发明专利
    • Light detecting device
    • 光检测装置
    • JP2003279410A
    • 2003-10-02
    • JP2002085102
    • 2002-03-26
    • Makoto AkibaCommunication Research Laboratory独立行政法人通信総合研究所誠 秋葉
    • AKIBA MAKOTO
    • G01J1/44H01L31/00H01L31/10H04N5/335H04N5/374
    • H04N5/357
    • PROBLEM TO BE SOLVED: To provide a light detecting device having high light detection sensitiv ity by decreasing noises as much as possible.
      SOLUTION: The light detecting device comprises a light detector 1, a JFET 2 which reads detection signals of the light detector 1, an OP amplifier 3 which amplifies the signals read by the JFET 2, a feedback circuit which returns the output of the OP amplifier 3 to the JFET 2 through a feedback capacity 4, and a reset circuit which conduct a reset by discharging charges of the feedback capacity 4 through a MOSFET S1. A drain or source of the MOSFET S1 for reset is applied a voltage through a resistor R2 which is the same level of the gate voltage of the JFET 2, and a switch S2 is connected through a resistor Rl between a drain or source of the MOSFET S1 and the feedback capacity 4 which is controlled to be off if the MOSFET S1 is off, and to be on if the MOSFET S1 is on.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:通过尽可能减少噪声来提供具有高光检测灵敏度的光检测装置。 解决方案:光检测装置包括光检测器1,读取光检测器1的检测信号的JFET 2,放大由JFET 2读取的信号的OP放大器3,反馈电路,其返回 OP放大器3通过反馈电容4耦合到JFET 2;以及复位电路,其通过经由MOSFET S1对反馈电容4的电荷进行放电来进行复位。 用于复位的MOSFET S1的漏极或源极通过与JFET 2的栅极电压相同电平的电阻器R2施加电压,并且开关S2通过MOSFET的漏极或源极之间的电阻器R1连接 S1和反馈电容4,如果MOSFET S1断开,则其被控制为截止,并且如果MOSFET S1导通,则其为导通。 版权所有(C)2004,JPO
    • 4. 发明授权
    • Camera having a lens barrier
    • 相机具有镜头屏障
    • US06334718B1
    • 2002-01-01
    • US09585270
    • 2000-06-02
    • Makoto AkibaKazuaki Nagata
    • Makoto AkibaKazuaki Nagata
    • G03B1700
    • G03B17/04
    • A camera is provided with a lens barrier for covering and uncovering an opening which is formed in a front face of the camera and is for exposing a taking lens. The lens barrier protects the taking lens when the camera is not used. The lens barrier is driven by a motor. This motor is controlled by a motor control unit relative to its rotational direction (forward and backward direction), its rotational amount and its rotational speed. As the motor, a DC motor is used. Into this DC motor, drive-pulse trains having different duty factor are inputted to control the rotational speed. Owing to this, an operation speed of the lens barrier is controlled so as to be faster when the lens barrier opens the opening, and so as to be slower when the lens barrier closes the opening.
    • 相机设置有透镜屏障,用于覆盖和露出形成在相机的前表面中并用于曝光拍摄镜头的开口。 当相机不使用时,透镜屏障保护拍摄镜头。 透镜屏障由电机驱动。 该电动机由电动机控制单元相对于其旋转方向(前后方向),其旋转量和转速控制。 作为电动机,使用直流电动机。 在该DC电动机中,输入具有不同占空因数的驱动脉冲串来控制转速。 由此,透镜屏障的操作速度被控制为当透镜屏障打开开口时更快,并且当透镜屏障闭合开口时变得更慢。
    • 5. 发明授权
    • Drive controller
    • 驱动控制器
    • US07595836B2
    • 2009-09-29
    • US11727332
    • 2007-03-26
    • Makoto AkibaHideo Yoshida
    • Makoto AkibaHideo Yoshida
    • G03B13/00H04N5/232
    • G02B7/38G02B7/08
    • A drive controller is provided and controls the supply of driving pulses in such a way as to make an extension speed and a contraction speed along a direction of a piezoelectric element differ to cause the piezoelectric element to extend and contract, so as to move a lens, the drive controller including an AF evaluation value-measuring device for measuring an AF evaluation value in a driving direction of the lens, a return pulse number-calculating device for calculating a maximum value-presuming position so as to calculate a return pulse number, a reverse movement-control device for returning the lens in a reverse direction, a threshold calculating device for calculating an evaluation value threshold, a measurement and determination means for remeasuring the AF evaluation value and determining whether or not an AF re-evaluation value is equal to or larger than the evaluation value threshold, and an AF evaluation value remeasuring device for remeasuring an AF evaluation value in the reverse direction of the lens.
    • 提供驱动控制器并控制驱动脉冲的供给,使得沿着压电元件的方向的延伸速度和收缩速度不同,导致压电元件伸缩,从而移动透镜 所述驱动控制器包括用于测量所述透镜的驱动方向上的AF评价值的AF评估值测量装置,用于计算最大值推定位置以计算返回脉冲数的返回脉冲数计算装置, 反向移动控制装置,用于反向返回透镜;阈值计算装置,用于计算评估值阈值;测量和确定装置,用于重新测量AF评估值,并确定AF重新评估值是否相等 达到或大于评估值阈值的AF评估值重新测量装置,用于重新测量转速中的AF评估值 镜头的方向偏向
    • 6. 发明申请
    • Drive controller
    • 驱动控制器
    • US20070222886A1
    • 2007-09-27
    • US11727332
    • 2007-03-26
    • Makoto AkibaHideo Yoshida
    • Makoto AkibaHideo Yoshida
    • H04N5/232
    • G02B7/38G02B7/08
    • A drive controller is provided and controls the supply of driving pulses in such a way as to make an extension speed and a contraction speed along a direction of a piezoelectric element differ to cause the piezoelectric element to extend and contract, so as to move a lens, the drive controller including an AF evaluation value-measuring device for measuring an AF evaluation value in a driving direction of the lens, a return pulse number-calculating device for calculating a maximum value-presuming position so as to calculate a return pulse number, a reverse movement-control device for returning the lens in a reverse direction, a threshold calculating device for calculating an evaluation value threshold, a measurement and determination means for remeasuring the AF evaluation value and determining whether or not an AF re-evaluation value is equal to or larger than the evaluation value threshold, and an AF evaluation value remeasuring device for remeasuring an AF evaluation value in the reverse direction of the lens.
    • 提供驱动控制器并控制驱动脉冲的供给,使得沿着压电元件的方向的延伸速度和收缩速度不同,导致压电元件伸缩,从而移动透镜 驱动控制器包括:用于测量透镜驱动方向上的AF评估值的AF评估值测量装置;计算最大值推定位置以计算返回脉冲数的返回脉冲数计算装置; 反向移动控制装置,用于反向返回透镜;阈值计算装置,用于计算评估值阈值;测量和确定装置,用于重新测量AF评估值,并确定AF重新评估值是否相等 达到或大于评估值阈值的AF评估值重新测量装置,用于重新测量转速中的AF评估值 镜头的方向偏向