Lighting apparatus and method for controlling brightness and color location thereof
AssigneeOSRAM Opto Semiconductors GmbH
InventorsMichel Zwanenburg, Timothy Daniel Dunn
Life of this patent
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Abstract
A lighting apparatus emitting polychromatic light comprising light of at least two light-channels with different colors, wherein each light-channel is controlled by one modified pulse-width-modulated signal (modified PWM-signal), and each modified PWM-signal results from the modulation of one color-pulse-width-modulated signal (color-PWM-signal) with an intensity-pulse-width-modulated signal (intensity-PWM-signal) in order to control the brightness and color location of the polychromatic light.
Claims14
A method for controlling brightness and color location of a lighting apparatus emitting polychromatic light comprising light of at least two light-channels with different colors, wherein:
- the method comprises the step of controlling each light-channel by one modified pulse-width-modulated signal (modified PWM-signal), and
- each modified PWM-signal results from the modulation of one color-pulse-width-modulated signal (color-PWM-signal) with an intensity-pulse-width-modulated signal (intensity-PWM-signal).
Dependencies are inferred from the claim text.