Camera including electronic flash, camera shake detecting system, and power supply control function for same
First Claim
1. A camera in which an electronic flash emits light, the camera comprising:
- a capacitor that accumulates charge during a charging operation, the charge to be used to cause the electronic flash to emit light;
a camera shake detector that detects camera shake;
a power supply control circuit that controls the supply of power to the camera shake detector; and
a voltage detecting circuit that detects a voltage level across said capacitor;
wherein, when said voltage detecting circuit detects that the voltage level across said capacitor is lower than a voltage level at a time of completion of a charging operation and greater than a predetermined voltage level, said power supply control circuit supplies power to said camera shake detector.
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Accused Products
Abstract
A camera in which an electronic flash emits light includes a capacitor for accumulating charge used to cause the electronic flash to emit light, a camera shake detector for detecting camera shake, a power supply control circuit for controlling a power supply used for driving the camera shake detector, and a voltage detecting circuit for detecting a charging voltage level across the capacitor. When the voltage detecting circuit detects that the charging voltage level across the capacitor is greater than a predetermined voltage level which is set lower than a voltage at a time of completion of a charging operation of the capacitor, the power supply control circuit turns on the power supply used for driving the camera shake detector.
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Citations
18 Claims
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1. A camera in which an electronic flash emits light, the camera comprising:
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a capacitor that accumulates charge during a charging operation, the charge to be used to cause the electronic flash to emit light;
a camera shake detector that detects camera shake;
a power supply control circuit that controls the supply of power to the camera shake detector; and
a voltage detecting circuit that detects a voltage level across said capacitor;
wherein, when said voltage detecting circuit detects that the voltage level across said capacitor is lower than a voltage level at a time of completion of a charging operation and greater than a predetermined voltage level, said power supply control circuit supplies power to said camera shake detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
wherein said voltage detecting circuit detects the voltage across said capacitor before a charging operation of said capacitor is started. -
9. A camera according to claim 1, wherein when said voltage detecting circuit detects that the voltage level is lower than the predetermined voltage level, said power supply control circuit stops supplying power to said camera shake detector.
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10. A camera in which an electronic flash emits light, the camera comprising:
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a capacitor that accumulate charge during a charging operation, the charge to be used to cause the electronic flash to emit light;
an electronic flash control circuit that controls the charging operation;
a camera shake detector that detects camera shake;
a power supply control circuit that controls a power supply used to drive said camera shake detector; and
a voltage detecting circuit that detects a voltage level across said capacitor;
wherein, when said voltage detecting circuit detects that the voltage level across said capacitor is less than a first predetermined voltage level which is set lower than a voltage level at a time of completion of a charging operation, said power supply control circuit turns off the power supply used to drive said camera shake detector and said electronic flash control circuit starts the charging operation, and when said voltage detecting circuit detects that the voltage across said capacitor is greater than a second predetermined voltage level which is set lower than the voltage level at the time of completion of the charging operation, said power supply control circuit turns on the power supply used to drive said camera shake detector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification