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    • 10. 发明授权
    • Device detecting the amount of charge remaining in a battery
    • 设备检测电池中剩余的电量
    • US6064183A
    • 2000-05-16
    • US230619
    • 1999-01-28
    • Hiroshi AkizukiNobuhide Dotsubo
    • Hiroshi AkizukiNobuhide Dotsubo
    • H02J7/00G01R31/36G03B7/26H04N5/232H04N101/00H02J7/04H02J7/16
    • H04N5/23241G01R31/3648G03B7/26H04N5/232G01R19/16542
    • When an electronic still camera in which a value of a voltage from a battery 2 is compared with reference values in a heavily loaded condition, i.e. with an LCD monitor 21 operated, to detect the current amount of charge remaining in the battery and a battery voltage obtained that is lower than a reference value R3 forces the body of the camera to be powered off, is again powered on without changing the battery, the battery is immediately placed in a lightly loaded condition, since LCD monitor 21 is in a non-operating state. Thus, battery voltage increases and thus exceeds the reference value and this disadvantageously results in a result different from that of detection of the amount of charge remaining in the battery that is obtained before the camera is powered off. In order to overcome the disadvantage, the present invention allows the reference value R3 to be increased by a predetermined value a corresponding to the increase in battery voltage that results from the load reduction to set a new reference value when the camera is first forced to be powered off and is then powered on without changing the battery.
    • PCT No.PCT / JP97 / 02662 Sec。 371日期1999年1月28日 102(e)1999年1月28日PCT PCT 1997年7月30日PCT公布。 公开号WO98 / 06159 日期1998年2月12日当将来自电池2的电压值与重度负载状态(即,LCD监视器21的操作)的参考值进行比较的电子静态照相机,以检测当前剩余的电量 电池和获得的低于参考值R3的电池电压迫使照相机的主体断电,在不改变电池的情况下再次通电,由于LCD监视器21是电池,所以电池立即处于轻负载状态 处于非运行状态。 因此,电池电压增加并因此超过参考值,并且这不利地导致与在相机断电之前获得的在电池中剩余的电荷量的检测结果不同的结果。 为了克服这个缺点,本发明允许参考值R3增加一个预定值a,对应于由负载降低引起的电池电压的增加,当照相机首先被迫为 关闭电源,然后启动电源,无需更换电池。