Patent ID: 8207956

Claim:
A transmission signal generating method for compensating channel effect for a transmitter of a display device, the transmission signal generating method comprising: providing at least a first reference current and at least a first difference current, the first difference current being less than two times of the first reference current; providing at least a second reference current and at least a second difference current, the second reference current being equal to the first reference current, the second difference current being equal to the first difference current; combining the first reference current with the first difference current according to a coding symbol to generate a plurality of forward currents corresponding to a plurality of positive levels; combining the second reference current with the second difference current according to the coding symbol to generate a plurality of reverse currents corresponding to a plurality of negative levels; and using a plurality of signaling lines for transmission of the plurality of negative levels and the plurality of positive levels; wherein a transmission signal is formed based on the plurality of positive levels and the plurality of negative levels, and a first positive level of the plurality of positive levels and a first negative level of the plurality of negative levels both have a minimum signal amplitude of the plurality of signal amplitudes, and an amplitude difference of the first positive level and the first negative level is greater than an amplitude difference of any two neighboring negative levels of the plurality of negative levels and also greater than an amplitude difference of any two neighboring positive levels of the plurality of positive levels.