Projection-type image display apparatus

Details Projection-type image display apparatus Projection-type image display apparatus

2005-06-17

2008-11-25

Koval, Melissa Jan (Department: 2862)

Optics: image projectors

Composite projected image

Reflector between lamp and screen

C353S094000, C353S099000

Reexamination Certificate

active

07455409

ABSTRACT:
A projection-type image display apparatus using a light emitting diode light source including a compact optical arrangement. The projection-type image display apparatus includes an illumination optical system including a light emitting diode light source to produce light and emit the light produced in one direction, a uniform light illumination unit disposed along a first optical path to change a propagation direction of the light emitted from the illumination optical system and to emit uniform light, a display device to form an image from the light emitted from the uniform light illumination unit, and a projection optical system disposed along a second optical path to enlarge and project the image formed by the display device onto a screen, wherein the first optical path along which the uniform light illumination unit is disposed and the second optical path along which the projection optical system is disposed are parallel or substantially parallel to each other.

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KR Office Action dated May 29, 2006 issued in KR 2004-88980.

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