Invention Grant
US09462650B2 Light emitting device and a method for dimming a light emitting device 有权
发光装置和用于调光发光装置的方法

Light emitting device and a method for dimming a light emitting device
Abstract:
A light emitting device, comprising at least two light sources (21, 22, 23, 24) adapted for, in operation, emitting light with a first spectral distribution, a first light guide (4) comprising a first light input surface (41), which is arranged parallel to the main waveguiding direction of the first light guide (4), and a first light exit surface (42) extending in an angle different from zero in relation to the first light input surface (41), the first light guide being adapted for receiving the light with the first spectral distribution at the first light input surface, converting at least a part of the light with the first spectral distribution to light (14) with a second spectral distribution, guiding the light (14) with the second spectral distribution to the first light exit surface (42) and coupling the light (14) with the second spectral distribution out of the first light exit surface (42), the at least two light sources (21, 22, 23, 24) being arranged at mutually different distances from the first light exit surface (42) of the first light guide (4), and a control device (90) adapted for dimming the light emitting device starting with the light source of the at least two light sources (21, 22, 23, 24) which is arranged at a largest distance from the first light exit surface (42) of the first light guide (4).
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