Projection display apparatus.

摘要

A projection display apparatus includes a light source unit (50) for generating light for image formation, an electro-optical display device (43) for displaying an optical image by utilizing the light emitted from the light source unit (50), and an enlarging/projection lens (20). The light source unit (50), the display device (43), and the projection lens (20) are accommodated in a housing with vent openings. The housing also includes a fan (73) for cooling the interior of the housing with cool air and a cooler (3l) for maintaining a display panel (40) within a predetermined temperature range. The light source unit (50) includes a lamp (52) and a reflector (53) and is designed not to cause image deformation and formation of a shadow of a discharge portion. In order to display a television image on the display device (43), all television image display circuit units excluding an antenna are accommodated in the housing. The enlarging/projection lens (20) can control a magnification and a focal point of the image projected on the screen.