Solid-state sources of light for preferential colour rendition

摘要

Polychromatic light sources of white light, which have spectral power distributions composed of at least three different components, such as clusters of colored light-emitting diodes (LEDs) or LEDs with partial or complete conversion in phosphors. Disclosed are the peak wavelengths and relative partial radiant fluxes of the spectral components that allow rendering certain fractions of an extended color palette with high fidelity and with increased chromatic saturation, respectively, and hence meeting subjective preferences to color quality of illumination.

主权项

1. A method for obtaining illumination with preferential colour rendition using a light source comprising at least three solid-state electroluminescent and/or photoluminescent emitters, each emitter having an individual spectral power distribution and relative partial radiant flux selected by computational searching with the net spectral power distribution of said light source, wherein the computational searching is constrained by the condition that for more than fifteen different test colour samples illuminated by said light source, the colour shifts of the samples computed in respect of a reference light source are such that a) the ratio of the fraction of the test colour samples that are rendered with increased saturation to the fraction of the test colour samples that are rendered with high fidelity within the range of 0.3 to 3 and b) the fraction of the test colour samples that are rendered with decreased saturation of less than 10%.