A light emitting device is provided which is capable of displaying in desired colors stably by controlling a change in luminance of OLED when an organic light emitting layer is degraded or there is a change in temperature of the surroundings. A reference value for the amount of current flowing into a...http://www.google.co.uk/patents/US7960917?utm_source=gb-gplus-sharePatent US7960917 - Light emitting device and electronic equipment using the same
