Optical lens unit having internalized fan unit and projection apparatus housing the same

A projection display apparatus, comprising:

• an exterior case;
• a light source housed within said exterior case;
• an optical lens unit internally supported within said exterior case for optically processing a light beam emitted from the light source into an optical image, said optical lens unit defining a substantially sealed chamber therein and comprising:
• a plurality of optical components disposed within the sealed chamber to receive and optically modulate the light beam;
• and
• a fan disposed within the sealed chamber distally from the light beam to circulate air within the sealed chamber and cool said optical components;
• and
• a projection lens unit to project the optical image externally therefrom;
• wherein said plurality of optical components includes a light valve for receiving and optically modulating at least a portion of the light beam;
• wherein said fan circulates the air within the sealed chamber across said light valve in a substantially vertical manner;
• wherein the sealed chamber includes disparate first and second chambers separated by a divider having spatially-separated circulating air intake and outlet ports communicating with each chamber, said light valve positioned within said first chamber and said fan positioned within said second chamber;
• and
• wherein said fan circulates the air between the first and second chambers through the air intake and outlet ports.

An optical lens unit for optically processing a light beam emitted from a light source into an optical image, comprising:

• a substantially sealed chamber within which three light valves and a prism having incident planes are disposed, each of the light valves being positioned opposite a different one of the incident planes of the prism;
• a fan disposed within said sealed chamber distally from the light beam to circulate air within said sealed chamber and cool said prism and light valves;
• and
• an air path within said sealed chamber through which the air circulated by said fan flows and returns to an air intake side of said fan.

A projection display apparatus, comprising:

• an exterior case;
• a light source housed within said exterior case;
• an optical lens unit including a prism having incident planes, and three light valves each positioned opposite a different one of the incident planes of the prism;
• a sealed chamber within which said prism and light valves are disposed;
• a fan disposed within the sealed chamber distally from the light beam to circulate air within said sealed chamber and cool said prism and light valves;
• and
• an air path within said sealed chamber through which the air circulated by said fan flows and returns to an air intake side of said fan.