Patent ID: 7215240
Filing Date: 2007-05-08
Classification: B60J,B60R,H04L

Abstract:
1. A noncontacting short-range communication device for a slide door comprising: a rail provided in a vehicle body; a slide part provided in a slide door sliding being guided by the rail; a first antenna member attached to the rail in the longitudinal direction of the rail; a second antenna member provided in the slide part so as to face to the first antenna member closely; a first communication unit provided on the side of the vehicle body being connected to the first antenna member; and a second communication unit having the same constitution as that of the first communication unit, the second communication unit being provided on the side of the slide door being connected to the second antenna member, wherein the first and second communication units transmit or receive data by electromagnetic induction coupling between the first and second antenna members, wherein each of the first and second communication units is supplied with electric power from a battery and includes a microcomputer and a data communication circuit controlled by the microcomputer, the data communication circuit performing semi-duplex bidirectional communication, wherein the data communication circuit includes: a transmitting section, to which a clock pulse of the microcomputer is supplied, for transmitting a modulated wave obtained by on-off modulating the clock pulse as a base signal with the data having a serial communication form through the antenna member; and a receiving section for receiving and demodulating the modulated wave through the antenna member so as to gain the data having a serial communication form.