Illumination device with light emitting diodes and movable...

F - Mech Eng,Light,Heat,Weapons – 21 – V

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F21V 9/00 (2006.01) F21V 7/00 (2006.01)

Patent

CA 2701184

A light emitting device (100) is produced using one or more light emitting diodes (102) within a light mixing cavity (101) formed by surrounding sidewalls. The light emitting device includes a light adjustment member that is movable to alter the shape or color of the light produced by the light emitting device. For example, the light adjustment member may alter the exposure of the wavelength converting area to the light emitted that is emitted by the light emitting diode in the light mixing cavity. Alternatively, the height of a lens may be adjusted to change the width of the beam produced. Alternatively, a movable substrate with areas of different wavelength converting materials may adjustably cover the output port of the light mixing cavity to alter the color point of the light produced. Image

Dispositif électroluminescent obtenu au moyen de diodes électroluminescentes logées dans une cavité délimitée par des parois d'enceinte. Ledit dispositif comprend un élément de réglage de la lumière dont le mouvement a pour effet de modifier la couleur de la lumière produite par le dispositif électroluminescent. Par exemple, cet élément de réglage peut modifier l'exposition de la zone de conversion de longueur d'onde à la lumière émise par les diodes électroluminescentes dans la cavité de mélange de lumière. Une autre possibilité consiste à faire varier la hauteur d'une lentille afin de modifier la larguer du faisceau émis. En variante, un substrat mobile présentant des zones recouvertes de matériaux de conversion longueur d'onde différents peut recouvrir de façon réglable l'orifice de sorte de la cavité mélangeuse de lumière dans le but de modifier le point de couleur de la lumière produite

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