Four wire-to-two wire lamp control signal transmission system and method

A four wire-to-two wire lamp control signal transmission method, comprising:

• Step S1:
• synchronously sampling, within a preset sampling period, level states of R (red), G (green) and B (blue) lamp control signals in a four-wire system to obtain level states of the R, G and B lamp control signals, wherein the level states comprise a high level and a low level;
• Step S2:
• generating a preset converted signal corresponding to R, G and B control information carried by the level states of the three lamp control signals according to the level states of the R, G, and B lamp control signals, and encoding the preset converted signal to obtain a coded signal;
• Step S3:
• integrating electric power of the R, G, and B lamp control signals with power of a driving circuit in the four-wire system to obtain integrated electric power;
• Step S4:
• superposing the coded signal onto the integrated electric power to obtain composite electric power that is transmitted by a two-wire system;
• Step S5:
• receiving the composite electric power from the two-wire system and performing signal-power separation on the composite electric power to obtain driving power for driving a load, and the coded signal;
• and
• Step S6:
• decoding the coded signal to obtain the preset converted signal, inquiring, based on the preset converted signal, preset R, G and B control information corresponding to the preset converted signal, and outputting R, G and B control signals to the load according to the preset R, G and B control information.