Light source emitting mixed-colored light and method for...

H - Electricity – 05 – B

Patent

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H05B 33/08 (2006.01)

Patent

CA 2625117

A light source (10) is disclosed, emitting multi-coloured light with light of at least two different colours, emitted from a number of primary light sources (1) wherein the primary light sources (1) are divided into groups and the brightness values of the primary light sources (1) within a group are determined and controlled separately according to colour, such that the colour location of the multi-coloured light lies in a given region of the CIE standard colour diagram. The invention further relates to a method for controlling such a light source (10) and an illumination device with such a light source (10), for example, for backlighting a display.

La présente invention concerne une source de lumière (10) qui émet une lumière à mélange de couleurs, et contient de la lumière d'au moins deux couleurs différentes qui est émise par une pluralité de sources de lumière primaires (1). Selon l'invention: les sources de lumière primaires (1) sont réparties en groupes; et les valeurs de luminosité des sources de lumière primaires (1) dans un groupe, sont déterminées et commandées séparément selon les couleurs de sorte que la localisation chromatique de la lumière à mélange de couleurs se trouve sur une plage prédéterminée du diagramme de chromaticité de la CIE. L'invention a également pour objet un procédé pour commander une source de lumière (10) de ce type et un dispositif d'éclairage comprenant une source de lumière (10) de ce type, destiné par exemple au rétro-éclairage d'un affichage.

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