Rear projection image display apparatus

Details Rear projection image display apparatus Rear projection image display apparatus

2008-04-29

2008-04-29

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Rear projection screen

C359S449000, C359S319000, C359S625000, C359S626000, C359S684000, C359S794000, C353S076000, C353S077000, C353S034000, C353S049000, C353S082000, C353S119000

Reexamination Certificate

active

10953413

ABSTRACT:
A compact rear projection image display apparatus in which the projection distance in a projection optical system is substantially reduced and no reflection mirror is used, thereby eliminating a major cause of image trapezoidal distortion. The rear projection image display apparatus has a projection lens system which includes a first lens group with positive refractive power and a second lens group which further enlarges an image enlarged by the first lens group. The projection lens system enlarges and projects an image displayed on an image display device, on a transmission screen. No reflection mirror is provided between the second lens group and the transmission screen and the image enlarged by the second lens group is directly projected on the transmission screen.

REFERENCES:
patent: 5539579 (1996-07-01), Miyatake et al.
patent: 5539580 (1996-07-01), Kim
patent: 6094311 (2000-07-01), Moskovich
patent: 6577455 (2003-06-01), Shikama
patent: 6761458 (2004-07-01), Sakata et al.
patent: 05-134213 (1993-05-01), None
patent: 06-265814 (1994-09-01), None
patent: 11-326759 (1999-11-01), None
patent: 2000-162544 (2000-06-01), None
patent: 2002-357768 (2002-12-01), None

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