Patent ID: 6972788
Filing Date: 2005-12-06
Classification: G02B,H04N

Abstract:
1. A projection display, comprising: a hollow case including a window opening; a screen formed on one portion of said case; at least one mirror internally mounted in said case at a position to reflect light from said window opening to said screen; a window mounted in said window opening; an optical engine mounted to said case, with said optical engine being positioned over said window and oriented so that emitted light from said optical engine is directed onto said at least one mirror; a diaphragm internally attached to said case and dividing an internal volume of said case into a first portion and a second portion; a gas filling said second portion of said case at an overpressure; and a vent communicating with said first portion of said case and communicating with an external environment to at least partially equalize said overpressure of said second portion with a pressure of said external environment.