Patent ID: 7753532

Claim:
A projection display unit comprising: a light source; an optical unit including a light valve and a projection lens; a cooling fan for cooling the light source and the optical unit; and a cabinet configured to house the light source, the optical unit, and the cooling fan, the cabinet including: an opening below the light source, through which the light source is replaceable, a lid for closing the opening, the lid having an area of at least two times an area of the opening, and a radiant heat insulating plate mounted onto a light source side of the lid, the radiant heat insulating plate contacting the cabinet across an area of at least half of an area of the radiant heat insulating plate; and a light source case having an open upper side above the light source and a highly heat conductive sheet metal component part disposed over the open upper side of the light source case, in between the light source and the cabinet.