Brightness improving apparatus for projection television

Details Brightness improving apparatus for projection television Brightness improving apparatus for projection television

2006-02-07

2006-02-07

Lee, Michael H. (Department: 2614)

Television

Video display

Projection device

C359S457000, C359S460000, C349S061000

Reexamination Certificate

active

06995811

ABSTRACT:
A high-brightness projection television is provided which includes a screen having a first lens for refracting an incident beam into a convergent beam, a second lens for refracting the beam refracted by the first lens into a divergent beam, and a protection plate for protecting at least the second lens, wherein an optical emission material is included in at least one of the above elements to convert invisible lights included in the incident beam into visible lights. Alternatively, the projection television may include an optical emission layer having the optical emission material between a light source and an image generator such as a liquid crystal display (LCD). Accordingly, vertical and horizontal angles of view are increased and overall brightness of the image is improved.

REFERENCES:
patent: 4059767 (1977-11-01), Macovski
patent: 4872750 (1989-10-01), Morishita
patent: 5504598 (1996-04-01), Sprague et al.
patent: 6-303625 (1994-10-01), None
patent: 2001-264880 (2001-09-01), None

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