An illumination system (10), comprising:—four lamps (12A, 12B, 12C, 12D);—four lamp drivers (13A, 13B, 13C, 13D) capable of driving their corresponding lamps with respective dim factors (ξ1, ξ2, ξ3, ξ4);—a common controller (15) for controlling the dim factors of the respective lamps. The controller is responsive to an input signal indicating a target color point (T) having target chromaticity coordinates (xT, yT) and target brightness (BT). The controller sets the dim factor (ξ4) of one lamp to be equal to 1, and calculates an optimum solution for the other three dim factors as a function of the target chromaticity coordinates (xT, yT), for the maximum allowed value of the luminance (YMAX) for which 0≦ξ≦1 applies for each of said dim factors (ξ1S, ξ2S, ξ3S).
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机译:一种照明系统( 10 B>),包括:-四个灯( 12 B> A, 12 B> B, 12 B> C, 12 B> D);-四个灯驱动器( 13 B> A, 13 B> B, 13 B> C, 13 B> D)能够以相应的调光因子(ξ 1,ξ2,ξ3,ξ4 B>)驱动相应的灯;-用于控制的通用控制器( 15 B>)各个灯的暗淡因素。控制器响应于指示具有目标色度坐标(x T Sub>,y T Sub>)和目标亮度(B T)的目标色点(T)的输入信号 Sub>)。控制器将一个灯的调光因子(ξ 4 B>)设置为等于1,并根据目标色度坐标(x T Sub>,y T Sub>),对于每个所述暗淡因子,0≤ξ≤1的亮度的最大允许值(Y MAX Sub>) (ξ 1 B> S Sub> ,ξ2 B> S Sub> ,ξ3 B> S 子>)。
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