Go up electric protection device , box and LED display screen

The utility model discloses a go up electric protection device, box and LED display screen, most likely last electric protection device are arranged in according to the connection status between the connector of the connector of the box lamp plate of LED display screen and keysets, on the control lamp plate, including detection circuitry and starting circuit, wherein, detection circuitry opens starting circuit behind the feedback signal of normal connection between the connector of the connector and the keysets that continuously detect the sign lamp plate to connector through the keysets is supplied power to the lamp plate. Owing to only continuously received under feedback signal's the condition at detection circuitry, can confirm normal connection between lamp plate and the keysets, openstarting circuit and supply power to the lamp plate this moment, can not damage the lamp plate, consequently, the connector and the connector of keysets of having avoided the lamp plate are connectedfor the lamp plate power