Display device comprising the signal modulation and demodulation method, a signal modulation and demodulation device, and to do this it

In the signal modulation and demodulation method, in response to an input data signal containing data information to be provided externally, on the basis of an input clock signal provided externally generated plural for each cycle, the input shift clock signal are two periods of the input clock signal It is combined for transmission is modulated with a signal corresponding to the input data signal. Then, to recover the data information, from the transmission signal, the output clock signal is detected, and a plurality of output shift clock signals generated during each period on the basis of the output clock signal are combined for a second period of the output clock signal It is demodulated into the output data signal. By in response to the input data signal provided from the signal controller combining the shift clock signal for two cycles generates a transmission signal, it is possible to increase the bandwidth of the serial data signal and increases the bit efficiency. Transmitted signal, the signal modulation unit, a signal demodulator