Patent ID: 7356395

Claim:
An inter-device communication system for a wiper control apparatus that includes a wiper driving device for operating a wiper and a rain detection device and controls an operation of the wiper for removing raindrops on a windshield glass by the wiper driving device in accordance with an amount of raindrops detected by the rain detection device, the inter-device communication system comprising: a communication means having a single transmission line for unidirectionally sending a signal to one of the wiper driving device and the rain detection device; a transmission means, arranged in the one of the wiper driving device and the rain detection device, for short-circuiting a potential of the signal unidirectionally sent through the transmission line; and a recognition means, arranged in the other of the wiper driving device and the rain detection device, for recognizing transmitting information from the one of the wiper driving device and the rain detection device to the other of the wiper driving device and the rain detection device, the transmitting information being transmitted in response to the short-circuited signal.