Oledcomm

Institut Vedecom

Université Versailles Saint-Quentin-En-Yvelines

Bastien Bechadergue

Carlos Dominguez-Gonzalez

Clément Lartigue

Benjamin Azoulay

Luc Chassagne

Hongyu Guan

A detection and communication module arranged to implement a face detection function and an optical wireless communication function, and including a processing unit, a transmission chain and a reception chain, the processing unit being arranged to transmit via the transmission chain a detection signal, to receive via the reception chain the detection signal following its reflection on a face surface of an individual, and to evaluate a distance between the detection and communication module and the face surface of the individual, the processing unit being further arranged to transmit via the transmission chain a transmitted optical wireless communication signal containing data to be transmitted, and to receive via the reception chain a received optical wireless communication signal.

Face detection and optical wireless communication module

An optical wireless communication device includes a processing component which is configured to produce transmitted digital signals during transmission periods; a light source which is configured to produce transmitted light signals from transmitted analog signals; a shutdown circuit which is configured to selectively activate or deactivate the light source; the processing component including a binary output to which it applies 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 configured 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.

Wireless optical communication device

The present invention relates to an optical telemetry system for measuring the distance between two vehicles comprising a first optoelectronic assembly formed by at least one light source SLand at least one photosensitive sensor CP+, which source and sensor are oriented towards in front of the vehicle, and a second optoelectronic assembly formed by at least one light source SL() and at least one photosensitive sensor CP() that is oriented towards behind the vehicle, characterized in that said light sources SLand SLare conventional light sources, the light source SLbeing modulated by a signal of frequency F, said light source SL() of the target () being modulated by a clock of frequency controlled by a phase-locked loop driven by the electrical signal delivered by said photosensitive sensor CP, said first optoelectronic assembly furthermore comprising a circuit for measuring the phase shift between the electrical signal delivered by said photosensitive sensor CP() and the signal modulating the paired light source SL(), said system furthermore comprising a computer for determining the distance depending on the frequency Fand the measured phase shift. The invention also relates to an optoelectronic assembly for an optical telemetry system, to a vehicle equipped with such a system and to a telemetry method.

Optical telemetry system

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Malakoff, France

Bastien Bechadergue