COLOUR CONTROL OF A LUMINESCENT LIGHT GUIDE Russian patent published in 2019 - IPC F21K2/00 H01L33/58 

FIELD: lighting engineering.

SUBSTANCE: lighting device (100) comprises a plurality of light sources (200) configured to emit light (201) of a light source, wherein a plurality of light sources (200) comprises at least first light source (210) configured to generate first light (211) of light source, and second light source (220), configured to generate second light (221) of light source. Lighting device further comprises light guide (300) comprising: luminescent material (310) excited by light source (201) and capable of providing light (311) of luminescent material, wherein luminescent material (310) is able to reabsorb at least part of its light (311) of luminescent material, light output window (330) for output of light (311) of the luminescent material from light guide (300) and a plurality of light input regions (320) located perpendicular to the light output window (330) and comprising at least a first light input region (321) at first distance (d1) from light output window (330), and second light input area (322) located at second distance (d2) from light output window (330). First light source (210) is configured to output said first light source (211) to first light input region (321), wherein the second light source (220) is configured to emit said second light (221) of the light source into the second light input region (322), wherein the first distance (d1) is not equal to the second distance (d2). Lighting device additionally contains control module (500) configured to control the light colour temperature of the lighting device by independently controlling the plurality (m) of light sources (200) depending on the distance of each light source from the light output window (330).

EFFECT: possibility to adjust intensity and colour of emitted light.

15 cl, 2 dwg