A multicolor organic light emitting display device employs angle-walled blue, green and red emitting mesas, with optional metal reflectors on the angled walls, in a plurality of pixels. The angle-walled mesas, which resemble truncated pyramids, direct light out of the mesa by reflection from the mesa...http://www.google.fr/patents/US6091195?utm_source=gb-gplus-shareBrevet US6091195 - Displays having mesa pixel configuration
