Lighting system and a method of controlling a lighting system

摘要

A lighting system 100 and a method of controlling a lighting system are provided. The lighting system comprises a lighting arrangement 106 with a first light emitter 108, a second light emitter 114 and a driving circuitry 104 and comprises a controller 102 providing a control signal 103 to the driving circuitry. The first and second light emitters emit different colors or light L1, L2. The controller is configured to generate the control signal such that a required minimum amount of light is received at a relative position P with respect to the lighting arrangement and that the amount of power used by the lighting arrangement is minimized when the lighting arrangement emits light in accordance with the generated control signal. In the generation of the control signal efficiency ratios R1, R2 for the different light emitters are taken in to account.

主权项

1. A lighting system comprising a controller for generating a control signal and comprising a lighting arrangement, the lighting arrangement being configured to emit mixed light being a combination of first light (L1) and second light (L2), the lighting arrangement comprising a first light emitter, a second light emitter and a driving circuitry, the lighting arrangement being configured to receive a control signal from the controller, wherein
the control signal indicating a first required light emission by the first light emitter and a second required light emission by the second light emitter, the first light emitter being configured to emit the first light (L1) of a first color distribution and the second light emitter being configured to emit the second light (L2) of a second color distribution being different from the first color distribution, the driving circuitry being configured to drive the first light emitter at a first power level (P1) in response to the received control signal and to drive the second light emitter at a second power level (P2) in response to the received control signal,the controller being configured to
obtain a required illumination level (Imin), a first efficiency ratio (R1) and a second efficiency ratio (R2), the first efficiency ratio (R1) being a ratio between an amount of power (P1) provided to the first light emitter and an amount of the first light (L1) received at a relative position (P) with respect to the lighting arrangement, the second efficiency ratio (R2) being a ratio between an amount of power (P2) provided to the second light emitter and an amount of the second light (L2) received at the relative position (P), determine the first required light emission and the second required light emission to obtain, when the said light emitters emit light in accordance with said required light emissions, an amount (I) of the mixed light received at the relative position (P) being at least the required illumination level (Imin) while an amount of power consumed by the lighting arrangement is minimized.