Wireless optical communication device

An optical wireless communication device comprising:

• a processing component which is configured to produce transmitted digital signals during transmission periods;
• a digital-to-analog converter arranged to produce transmitted analog signals from the transmitted digital signals;
• a light source which is configured to produce transmitted light signals from the transmitted analog signals;
• a shutdown circuit arranged to selectively activate or deactivate the light source;
• wherein the processing component comprises a binary output and being arranged to generate and apply to the binary output a binary control signal which is in a first state during the transmission periods and in a second state outside the transmission periods, the shutdown circuit being arranged to receive the binary control signal, and to activate the light source when the binary control signal is in the first state and to deactivate the light source when the binary control signal is in the second state.