A number of red LEDs, green LEDs, and blue LEDs are mounted on one surface of a multilayer flexible substrate having a round plane figure. The LEDs are connected in series according to color. At least three sets of terminals which are each made up of a red feeder terminal, a green feeder terminal, a...http://www.google.fr/patents/US6834981?utm_source=gb-gplus-shareBrevet US6834981 - Light-emitting unit, light-emitting unit combination, and lighting apparatus assembled from a plurality of light-emitting units
Light-emitting unit, light-emitting unit combination, and lighting apparatus ...