Apparatus and method for controlling colour and colour...

H - Electricity – 05 – B

Patent

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Details

H05B 33/02 (2006.01) H05B 33/08 (2006.01) H05B 37/02 (2006.01)

Patent

CA 2589207

The present invention provides a method and apparatus for controlling the correlated colour temperature (CCT) or colour of light produced by an array of light-emitting elements by providing multiple selectable paths for the flow of drive current. The apparatus includes a primary path comprising primary light- emitting elements, and one or more secondary paths comprising secondary light- emitting elements that are used for compensation or correction of the colour of light emitted by the primary light-emitting elements. A plurality of control means, for example switches are used to direct current through particular paths. During operation, the drive current primarily flows through the primary light-emitting elements and is redirected, periodically for example, to a secondary path comprising light-emitting elements of a particular colour that is desired in addition to the colour produced by the primary light-emitting elements.

L'invention concerne un procédé et un appareil permettant de commander la température de couleur proximale (CCT) ou la couleur de lumière produite par un ensemble d'éléments électroluminescents par utilisation de multiples chemins sélectionnables pour le passage du courant d'attaque. L'appareil de l'invention comprend un chemin primaire qui comporte des éléments électroluminescents primaires, et un ou plusieurs chemins secondaires qui comportent des éléments électroluminescents secondaires utilisés pour la compensation ou la correction de la couleur de lumière émise par les éléments électroluminescents primaires. Une pluralité de moyens de commande, par exemple des commutateurs, sont utilisés pour orienter le courant dans des chemins particuliers. En cours de fonctionnement, le courant d'attaque passe principalement dans les éléments électroluminescents primaires et est redirigé, par exemple périodiquement, vers un chemin secondaire comprenant des éléments électroluminescents d'une couleur particulière désirée en plus de la couleur produite par les éléments électroluminescents primaires.

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