Rear projection optical system
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United States of America Patent
Stats
-
Jul 13, 2004
Grant Date -
Jan 16, 2003
app pub date -
Jul 10, 2002
filing date -
Jul 13, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed herewith is a rear projection optical system for being installed at a rear side of a screen of a rear projection apparatus. The rear projection system comprises: a display panel; a illuminating optical system for illuminating the display panel, the illuminating optical system being decentered from a screen center in both of a horizontal direction and a vertical direction; and a projection optical system, decentered from the screen center in the vertical direction, for projecting a display image on the display panel projected by the illuminating optical system onto a screen through a rear mirror positioned at a position that is the center of the screen. The projection optical system comprises a dioptric system, a deflection mirror, and a curved mirror in this order from the display panel to the rear mirror, and the curved mirror is decentered from the screen center in the vertical direction but centered against the screen center in the horizontal direction.
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