| 摘要 |
A capacitive coupling-type transmitting and receiving circuit for information signal is provided in which attenuation of a signal on a non-contact transmission path via a capacitor and a change of voltage on the receiving side due to a slight change in capacitance are suppressed, modulation and demodulation processes of signals are unnecessary, and non-contact transmission which does not depend on the transmission rate is enabled. The capacitor is formed with a transmitting electrode on a transmission board and a receiving electrode on a display panel board, and an insulating member is interposed between the electrodes. The transmitting board comprises a transmission signal processing circuit which converts display data from an external signal source into a voltage signal. The display panel board comprises an impedance converter circuit and a reception signal processing circuit. |
