| 摘要 |
PCT No. PCT/JP97/02662 Sec. 371 Date Jan. 28, 1999 Sec. 102(e) Date Jan. 28, 1999 PCT Filed Jul. 30, 1997 PCT Pub. No. WO98/06159 PCT Pub. Date Feb. 12, 1998When 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. |
