There is provided a light emitting device which enables a color display with good color balance. A triplet compound is used for a light emitting layer of an EL element that emits red color, and a singlet compound is used for a light emitting layer of an EL element that emits green color and a light emitting...http://www.google.de/patents/US7400087?utm_source=gb-gplus-sharePatent US7400087 - Light-emitting device having triplet and singlet compound in light-emitting layers
