Patent ID: 7259918
Filing Date: 2007-08-21
Classification: G02B

Abstract:
1. A projection device, comprising: an image source unit configured to emit light carrying an image; a first projecting optical system configured to form an intermediate image carried by the light emitted by the image source unit; a second projecting optical system; an intermediate optical system configured to lead light carrying an image from the first projecting optical system to the second projecting optical system, the second projecting optical system being configured to project light lead by the intermediate optical system to a screen of the projection device, wherein an image displaying surface of the image source unit is tilted with respect to a first imaginary plane that is perpendicular to an optical axis of the first projecting optical system, wherein the intermediate image is tilted with respect at least the first imaginary plane, wherein following relationship is satisfied: where, f θ H represents a length of the image source unit which corresponds to the image projected on the screen in the vertical direction, and θ