Automotive Lighting Italia S.p.a.

Automotive Lighting Italia S.p.a. a Socio Unico

Alberto Guiotto

Davide Baccarin

Giancarlo Codutti

Jasmin Kreso

A method for controlling a motor-vehicle lighting device is provided that uses LEDs supplied with PWM signals temporally spaced apart from one another by a first time phase tand a second time phase t. An interval of interest is defined in which an electromagnetic disturbance must not exceed a maximum threshold value &#x3b8;max; driving signals are supplied on the basis of first phases tand tcomputed; and the measured or simulated waveform of the electromagnetic disturbance deriving from the phases tand tis compared with the maximum threshold value within the interval of interest defined. Where the waveform of the disturbance exceeds the threshold, two phases tand t, once again different from one another, are recalculated; otherwise, the last phases tand tcalculated are selected and used in the PWM control. An advantageous motor-vehicle lighting device is also provided.

Method for controlling a motor vehicle lighting device that uses LEDs

A driver device of a plurality of light sources, in particular LEDs, includes a multi-channel current control module () which sets a power supply current on a respective output channel connected to at least one light source (). At least one static configuration register () is connected to said current control module in which a static driving configuration corresponding to the value of the power supply current which the multi-channel current control module must set on each output channel when the driver device is in a stand alone operating mode, is pre-loaded as well as at least one dynamic configuration register () that acts to load a dynamic driving configuration received from a digital transmission data bus connected to an electronic control unit.

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Tolmezzo, Italy

Alberto Guiotto