Power supply device for lighting device assembly of e.g. cab interior of common transport vehicle, has individual and general dimmer for delivering variable voltage set points, and adder for adding variable voltage set points
摘要
<p>The device (20) has an individual dimmer (2) associated to a lighting device (1) that is formed of LEDs (3). The dimmer delivers a variable voltage set point and comprising a generating unit for generating a pulse width modulated power supply signal (13) from the set point. A general dimmer (21) delivers another variable voltage set point. Adder (22) adds the variable voltage set points at an input of the generating unit.</p>
