Projection display apparatus for reducing optical elements

Details Projection display apparatus for reducing optical elements Projection display apparatus for reducing optical elements

2011-02-22

2011-02-22

Luu, Thanh X (Department: 2878)

Optics: image projectors

Composite projected image

Multicolor picture

C353S077000

Reexamination Certificate

active

07891817

ABSTRACT:
A projection display apparatus that projects an image on a screen includes at least three light sources that emit light beams of different wavelengths, at least three optical units that convert the light beams emitted from the at least three light sources into substantially collimated light beams, a beam-combining unit that combines the light beams received at different angles from the at least three optical units into a single beam of light, and a scanning unit that scans the beam emitted from the beam-combining unit so as to allow the beam to enter the screen.

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patent: 2006/0181756 (2006-08-01), Yamazaki
patent: 2006-11259 (2006-01-01), None

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