Patent ID: 8317336
Filing Date: 2012-11-27
Classification: G03B,H04N

Abstract:
1. An image projection apparatus configured to project an image using light from a light source, the apparatus comprising: a first flow path configured to pass a first airflow for cooling the light source; a second flow path configured to pass a second airflow for cooling constituent parts other than the light source; an exhaust box including a first opening, the first opening forming a third flow path configured to pass a third airflow, and the exhaust box receiving the first airflow from the first flow path; and a fan configured to exhaust the second airflow and combined airflow from the exhaust box, the combined airflow from the exhaust box including the first airflow and the third airflow, but not including the second airflow, which passes outside of the exhaust box to the fan, wherein the third airflow is derived from the second airflow that enters the second flow path, wherein the exhaust box further includes a second opening, which forms a fourth flow path configured to pass a fourth airflow for cooling the constituent parts other than the light source, wherein a first surface of the exhaust box where the first opening is formed and a second surface of the exhaust box where the second opening is formed face different directions, wherein the combined airflow from the exhaust box further includes the fourth airflow, and wherein the third airflow and the fourth airflow are derived from the second airflow that enters the second flow path.