Patent ID: 8559826

Claim:
A digital image sender for transmitting a digital image signal including image signals for color image reproduction, a reference clock signal and parallel control signals, comprising: a parallel/serial converter configured to convert the parallel control signals into a serial control signal by time division multiplexing; a superposition element configured to superimpose the serial control signal obtained by the conversion by said parallel/serial converter and the reference clock signal and output a resulting superposition signal, wherein the superposition signal is formed by combining individual optical element driving currents respectively associated with the serial control signal and reference clock which are simultaneously applied to an electrooptic converter; the electro-optic converter configured to convert the superposition signal outputted from said superposition element from an electric signal into an optical signal, and further wherein the reference clock and at least three parallel control signals are converted via a single electrooptic converter into an optical signal, and wherein an amplitude controller receives the reference clock and serial control signal and provides outputs such that an amplitude of the reference clock has a predetermined relationship to an amplitude of the serial control signal and the amplitude controller provides an output corresponding to the reference clock to an optical element driver having a current signal output and the amplitude controller provides an output to a transistor that controls a further current that is combined with the optical element driver current signal output in order to drive the optical element with the combined current.