Patent ID: 9113532
Filing Date: 2015-08-18
Classification: H05B

Abstract:
1. A light emitting device comprising: a set of light source units including multiple types of solid state light emitting elements having different light colors, each of the light source units comprising the same type of the solid state light emitting elements connected in series; and an information storage unit including at least one circuit element which stores information about electrical characteristic of the set of light source units for the information to be transmitted to an illumination apparatus after connection of the light emitting device to the illumination apparatus, wherein the information represents a relationship between a light output and a drive current of the set of light source units and represents an error in the drive current of the set of light source units due to a difference in a production lot or a use environment of the solid state light emitting elements such that, when the information is transmitted to the illumination apparatus after connection of the light emitting device to the illumination apparatus, the illumination apparatus determines the drive current provided to the light emitting device based on the information to suppress a variation in the light output of the set of light source units due to individual variations among the solid state light emitting elements.