Patent ID: 8474983
Filing Date: 2013-07-02
Classification: F21V,G03B

Abstract:
1. A light-source cooling device for cooling a lamp unit that includes an arc tube and a reflector for reflecting light generated from said arc tube, said light-source cooling device comprising: two airflow guide units for guiding cooling airflows to said are tube; and fans for impelling said cooling airflows toward said two airflow guide units, wherein airflow outlets of said two airflow guide units are arranged at opposite directions of said reflector with openings of the airflow outlets of said two airflow guide units facing each other, wherein a first airflow outlet that comprises one of said two airflow guide units is configured to blow said cooling airflows toward a top portion of said are tube, and a second airflow outlet that comprises another outlet of said two airflow guide units is configured to blow said cooling airflows toward a bottom portion of said are tube, wherein a center of a flow of a cooling airflow from each of said airflow outlets is shifted with respect to a center of said are tube, and wherein a speed of the cooling airflow from the first airflow outlet is more than a speed of the cooling airflow from the second airflow outlet.