A lighting system (100) includes a light-emitting diode (LED) (106) that emits light having a hue that varies in response to variations in a voltage applied to the LED (106) and an intensity that varies in response to variations in a duty cycle of the applied voltage. The lighting system (100) includes a controller (104) configured to receive a command signal (130) having a periodic peak voltage (138) and a periodic valley voltage (140). The controller (104) includes a peak detector (120) and a valley detector (122) that detects the peak voltage (138) and the valley voltage (140), respectively. The controller (104) includes a pulse generator that generates a pulse stream having a pulse-voltage magnitude substantially equal to the detected peak voltage (138) and a pulse-voltage duty cycle substantially equal to the ratio of the detected valley voltage (140) to the detected peak voltage (138). The generated pulse stream is applied to the LED (106) 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


    Additional title:

    FARBTON- UND VERDUNKELUNGSSTEUERUNGSSCHALTUNGEN FÜR LAMPEN ODER LED-ARRAYS
    CIRCUITS DE COMMANDE ET DE GRADATION DE TEINTES POUR LAMPES OU POUR RÉSEAUX DE DEL


    Contributors:

    Publication date :

    2019-11-06


    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 / H04B TRANSMISSION , Übertragung



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