DEVICE FOR DISCRIMINATING POWER SOURCE VOLTAGE OF CAMERA

摘要

PURPOSE:To obtain a device discriminating the voltage of a power source without changing a criterion by activating a means such as a lens barrel driving circuit or a shutter blade driving circuit related to a function provided in a camera and requiring power feeding is accordance with a photographing mode when the voltage of the power source is discriminates before release. CONSTITUTION:The discrimination of the voltage of the power source before the release is executed by activating both or one of the lens barrel driving circuit 2b and the shutter blade driving circuit 3b in accordance with the photographic mode. For example, both of the driving circuits 2b and 3b are activated in a preflashing mode. In a low brightness automatic light emitting mode, only the driving circuit 2b is activated. That means, since the voltage dropping amount of the power source is increased or decreased in accordance with the change of load current, the device becomes the same as the device that the criterion is changed for every photographing mode even when the criterion is identical.