Patent ID: 9674913
Date: 2017-06-06
CPC Classifications: B60Q,F21S,H05B,Y02B

Claim:
1. A vehicle lighting device comprising: at least one light source designed and being powered by a drive current (I) to generate light; and an electronic control device configured to control the drive current (I) supplied to said light source; said electronic control device comprising: control means configured to provide said drive current (I) to said light source, and to generate a control signal (CS) based on the difference between a quantity indicative of said drive current (I) and a predetermined reference electrical quantity (Iref); light source driving means configured to regulate said drive current (I) passing through said light source based on said control signal (CS); said vehicle lighting device ( voltage stabilizing means, which have one or more intermediate nodes and are designed to provide in said intermediate nodes, in a first operating condition, predetermined stabilized voltages (Vz first transistor means having a control terminal connected to said control means to receive therefrom said control signal (CS), and a first terminal connected to a reference line held at a constant reference voltage; second transistor means having one or more control terminals connected to respective intermediate nodes of said voltage stabilizing means to be held, in said first operation condition, to said predetermined stabilized voltages (Vz