Screen unit and projection type display apparatus

Details Screen unit and projection type display apparatus Screen unit and projection type display apparatus

2008-01-01

2008-01-01

Lee, Diane (Department: 2851)

Optical: systems and elements

Projection screen

C359S460000, C359S896000

Reexamination Certificate

active

07315416

ABSTRACT:
A screen panel includes a rigid glass, a lenticular lens and a Fresnel lens laminated with each other, and the edges of the screen panel are sealed. An air evacuation path is formed between the lenses by wires inserted between the contact surfaces of the lenses, or by convexes or concaves previously formed on one of the contact surfaces. Because of the provision of the air evacuation path, the air between the lenses of the screen panel is sufficiently evacuated, and the lenses can closely attached to each other. Therefore, the flatness of the screen panel can be enhanced, and the degradation of the image quality can be prevented.

REFERENCES:
patent: 2004/0201887 (2004-10-01), Takano
patent: 2005/0185270 (2005-08-01), Engle
patent: 2006/0126172 (2006-06-01), Iwaki et al.
patent: 6-194740 (1994-07-01), None
patent: 8-314015 (1996-11-01), None
patent: 2001-154274 (2001-06-01), None
patent: 2001-356419 (2001-12-01), None

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