SWITCHING DEVICE FOR DRIVING LED ARRAY BY PULSE-SHAPED CURRENT MODULATION
First Claim
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1. A switching device for driving an LED array, the switching device comprising a drive generator configured to modulate a mean strength of a current provided to the LED array by a first modulation type, a second modulation type, and a third modulation type.
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Abstract
A circuit drives an LED array and controls the brightness of the LED array by regulating the current flowing through the array. The LED array is driven by a pulse-shaped current of which the mean value is regulated with at least one or two of the following types of modulation: frequency modulation, pulse-width modulation, and amplitude modulation.
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Citations
7 Claims
- 1. A switching device for driving an LED array, the switching device comprising a drive generator configured to modulate a mean strength of a current provided to the LED array by a first modulation type, a second modulation type, and a third modulation type.
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5. A switching device for driving an LED array, wherein the switching device comprises a drive generator configured to provide a current having a mean strength which is reducible from Inom to 0.05*10−
- 3 Inom using three different types of modulation.
- View Dependent Claims (6, 7)
Specification