Image display apparatus forming optical image by irradiating...

Details Image display apparatus forming optical image by irradiating... Image display apparatus forming optical image by irradiating...

2005-04-20

2008-08-12

Lee, Diane I. (Department: 2851)

Optics: image projectors

Plural

C353S030000, C362S612000, C362S555000, C362S800000, C348S801000

Reexamination Certificate

active

07410264

ABSTRACT:
A technique is provided that improves the usage ratio of light in the illumination optical system of an image display apparatus, in which the cross-sectional size or shape of the flux of light that has formed a light source image of an LED-based light-emitting section is converted by anamorphic optics, such as collimator lens, into a size or shape appropriate for an aperture in the portion that permits the flux of the light source image to pass through, in an optical system leading to an image display element(s), and thus the quantity of fluxes of light passed through the aperture is increased.

REFERENCES:
patent: 6547421 (2003-04-01), Sugano
patent: 7192147 (2007-03-01), Sakata et al.
patent: 2003/0231497 (2003-12-01), Sakata et al.
patent: 2006/0050245 (2006-03-01), Arai et al.
patent: 2006/0132725 (2006-06-01), Terada et al.
patent: 10-301201 (1998-11-01), None
patent: 2001-249400 (2001-09-01), None
patent: 2001-343706 (2001-12-01), None

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