As regards a surface light source device for use with back-light or the like of a transmissive display panel, the efficiency of the cooling structure for the device will be improved and dust and dirt will be prevented from adhering.The surface light source device has a housing, a diffuser panel, a reflective...http://www.google.com/patents/US5993027?utm_source=gb-gplus-sharePatent US5993027 - Surface light source with air cooled housing
