Projection display apparatus

A projection display apparatus comprising:

• a light source unit comprising a parabolic reflector, a lamp, and a metal plate, said lamp being provided with a light-emitting portion, an anode, and a cathode, said anode and said cathode being located to interpose said light-emitting portion, said light-emitting portion being located at a focal point of said reflector, and said anode and said cathode being present on an axis of said reflector, and said metal plate being adapted to entirely cover at least sides of said reflector, said lamp being fixed to said reflector such that the other end of said lamp is inserted in a neck formed in said reflector and is fixed by an adhesive filled in said neck;
• a display unit having a display device and a cooler coupled to said display device;
• an optical unit having at least one lens to enlarge an image displayed on said display device;
• cooling means for cooling at least said light source unit;
• and
• a housing for accommodating said light source unit, said display unit, said optical unit, and said cooling means.

A projection display apparatus comprising:

• housing means partitioned by partitioning means into a light source compartment and a display compartment, said light source and display compartments being provided with vent openings, respectively, and said partitioning means including light transmitting means;
• light source means disposed in said light source compartment and including a lamp and a reflector;
• display means disposed in said display compartment for displaying an optical image driven by electrical energy;
• heat radiation means adhered to said display means and including a volatile liquid for evaporating to vapor by absorbing radiation heat from said light source means, and means for liquefying the vapor by air cooling;
• projection means for enlarging and projecting the image displayed on said display means on a screen;
• and
• vent fan means for ventilating both said light source compartment and said display compartment through said vent openings.