Patent attributes
A projection type display device, in which efficient cooling is performed in a remarkably silent manner, includes: a light source unit; an optical unit for modulating illumination light output from the light source unit based on input image information; two power source sections and; a box for housing the optical unit, the light source unit and the power source sections; and a cover member for entirely covering at least an upper surface of the box, wherein an outlet for externally exhausting air in the box by using axial fans is provided only on a bottom side of the box. Liquid crystal panels that are held by the optical unit frame absorb the illumination light from the light source unit and thus have different increased temperatures. Cooling air blown through an outlet of a sirocco fan that is directly connected to the optical unit frame is divided by a cooling air reservoir and a distribution sheet into predetermined air quantities in accordance with the temperatures of the liquid crystal panels so that the quantities of air obtained by the division are directly sent to the liquid crystal panels.
