The present invention provides a fan to generate airflow passing around a lamp reflector. A wake region is formed near a leeward surface of the lamp reflector, and a light cut is installed in the wake region. The light cut has a fixing end and is fixed on a side end surface of a lamp holder of the lamp...http://www.google.se/patents/US6871959?utm_source=gb-gplus-sharePatent US6871959 - Light cut for projector
