Valeo Vision

Loïc Flandre

Sebastian Krick

Sylvain Yvon

Christophe Roger

Alain Dari

Benjamin Touzet

Stéphane Richard

Sébastian Krick

Grègoire Sadoux

Rémy Letoumelin

Arnaud Uhrich

A method and a device for gradually controlling the illuminating light intensity of light-emitting diodes by modulating the width of current pulses of defined duty cycle, using a DC-to-DC voltage converter and a control circuit for switching the supply current of the light-emitting diodes. Prior to switching the power supply of the diodes the DC-to-DC converter is initiated (A), so as to generate voltage pulses of defined duty cycle; the steady state of each pulse is determined (B), so as to generate a voltage pulse (CP) calibrated to a voltage level substantially corresponding to the steady-state level; and then the light-emitting diodes are powered (D) by applying each calibrated pulse to the light-emitting diodes by means of the switchable control circuit.

Method for controlling light-emitting diodes

A communication method is implemented in an on-board network between a master station (M) and a plurality of slave stations (S, S, S, S), of the type of those compatible with the standard Local Interconnect Network (LIN) protocol in which data frames are sent by the slave stations on a serial bus in response to the sending by the master station of identifiers () representative of the required content of the frames. All () or part of each of the specific data frames attached to the same predetermined identifier () is formed sequentially by each of the slave stations. This enables an optimisation of the load on a LIN network, thus enabling use of this economical standard for all 'passenger compartment functions', and in particular for the management of AFS type advanced lighting systems.

Communication method and device for a motor vehicle

The invention relates to a device for controlling diode lamps comprising a lighting module having at least one diode lamp, the diode lamp pertaining to a predefined range, at least one device for transmitting a unique signature representing the range, and an associated control module comprising reception means (for receiving a unique signature transmitted by the lighting module, and current adjustment means for adjusting and supplying, as a function of the transmitted signature, a current to said lighting module to cause the diode lamp to operate.

LED control device for a vehicle light

A measurement device and method for determining the angular position of a pivoting headlight by means of a measurement device that comprises at least one ferromagnetic element that emits a local magnetic field, first means of measuring the local magnetic field in projection on a first axis, the at least one ferromagnetic element being mounted so as to pivot with respect to the at least one first measurement means, and an electronic processing unit, the method comprising a measurement step, and a second processing step during which the electronic processing unit calculates the angular position of the headlight, that, during the measurement step, the intensity of the local magnetic field is measured in projection on a second axis orthogonal to a first axis, and that, during a second processing step, the electronic processing unit calculates a value representing the angle of the local magnetic field with respect to the first axis.

Method of determining the angular position of a headlight by several magnetic field measurement means

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Saint Maur des Fosses, France

Loïc Flandre