Light device for object detection

A driving assistance system for a motor vehicle, comprisescomprising at least one first device for detecting an object located in the environment of the motor vehicle, and a luminous device constituting a second object detection device that provides redundancy for the first object detection device, wherein the luminous device includes at least one luminous module configured to emit pulsed visible light modulated so as to transmit a high-frequency luminous code, the at least one first luminous module includes at least two sectors each grouping together multiple light-emitting diodes and a driver circuit, each of the light-emitting diodes being supplied with electric power by the driver circuit of the respective sector, so as to modulate, in accordance with the high-frequency code, an electric power received by the light-emitting diodes of the respective sector in order to emit the pulsed visible light, and a reception device for receiving the light emitted by the at least one first luminous module, for receiving the pulsed light, modulated in accordance with the code, after reflection of the pulsed light emitted by the at least one first luminous module from an object outside the vehicle, wherein the modulation frequency is greater than 10 MHz, and wherein the at least one first luminous module includes a delay-locked loop connected to the driver circuit of each of the sectors of the respective luminous module in order to synchronize the modulation, in accordance with the code, carried out by the driver circuits.