Method And Device For Transmitting A Coded Light Message, In Particular For Purposees Of Verifying The Display Of A Content By An Electronic Screen

A device for transmitting a coded light message, comprising:

• a local central control unit;
• a light-emitting device capable of emitting a plurality of colors and controlled by the local central control unit to emit the coded message in the form of a series of colors emitted during regular consecutive time intervals, said message being coded by transitions between different colors emitted over said consecutive time intervals, each transition between two consecutive predetermined colors representing a predetermined information item and said colors being chosen among N predetermined colors;
• a central decoding unit;
• a light sensor connected to the central decoding unit in order to capture the colors emitted by the light emitter during consecutive time intervals, the central decoding unit being capable of determining the color transitions between consecutive time intervals, representative of the coded message.