A lighting system includes a light-emitting diode (LED) that emits light having a hue that varies in response to variations in a voltage applied to the LED and an intensity that varies in response to variations in a duty cycle of the applied voltage. The lighting system includes a controller configured to receive a command signal having a periodic peak voltage and a periodic valley voltage. The controller includes a peak detector and a valley detector that detects the peak voltage and the valley voltage, respectively. The controller includes a pulse generator that generates a pulse stream having a pulse-voltage magnitude substantially equal to the detected peak voltage and a pulse-voltage duty cycle substantially equal to the ratio of the detected valley voltage to the detected peak voltage. The generated pulse stream is applied to the LED resulting in light emission of the controlled hue and of the controlled intensity.


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    Title :

    Hue and dimming control circuits for lamps or LED arrays


    Contributors:

    Publication date :

    2017-02-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H05B ELECTRIC HEATING , Elektrische Heizung / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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