ELECTRIC SHUTTER CONTROL CIRCUIT FOR VIDEO CAMERA

摘要

The present invention relates to a control circuit of a camera for preventing the iris of the lens and the electronic shutter iris from operating simultaneously when an auto iris lens is connected to a surveillance camera. The control circuit may include an automatic shutter iris lens operated according to an input of an on / off control signal, a connector for connecting the automatic iris lens, and a first to selectively generate an on / off control signal of the automatic shutter iris lens. An automatic iris lens connection detecting unit connected between a switch and an external power supply voltage and the connector, detecting an automatic iris lens when the connector is connected to the connector, and generating a switching control signal; And a second switch for supplying one of an output of the switch and a cutoff signal of a pre-set auto shutter iris lens to the auto shutter iris lens.