| 摘要 |
PROBLEM TO BE SOLVED: To execute an operation under simple control even when a living room master unit allows the illumination means of an entrance slave unit to flicker, and to satisfactorily execute the flickering of the illumination means and the recording of the imaged video of an entrance slave set camera.SOLUTION: An entrance slave unit 1 includes: a camera 13; an LED 16 for nighttime photography; and a brightness determination circuit 14 for determining nighttime. A living room master unit 2 includes: a security input part 26 for connecting a security sensor; a data storage part 24 for storing the imaged video of the camera 13; and a master unit CPU 28 for starting the camera 13 to execute recording when the occurrence of abnormality is detected by the security sensor, and for executing the flickering control of the LED 16. The master unit CPU 28 executes the flickering control of the LED 16 by continuously transmitting a flickering command to the entrance slave unit 1 at a fixed interval, and the slave unit CPU 18 starts the flickering of the LED 16 when receiving the predetermined number of times of flickering commands within a fixed time, and ends the flickering of the LED 16 when not receiving the flickering command for a fixed time. |
