A display apparatus is provided having a back light generated by waste heat of a system. A thermally illuminated strip is disposed on a surface of the display apparatus. The system has heat generating components, such as a CPU, which produce excess waste heat. A heat pipe conveys the heat from the heat...http://www.google.de/patents/US6275211?utm_source=gb-gplus-sharePatent US6275211 - Waste heat actuated display back light
