Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
2007-06-26
2007-06-26
Perkey, W. B. (Department: 2851)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
C359S460000, C359S020000, C348S059000
Reexamination Certificate
active
10980864
ABSTRACT:
A transmission type screen including a fly-eye lens having a convex shape on one side thereof and a light-shielding layer provided on an opposite side of a lens surface of the fly-eye lens and having a plurality of openings provided near each focus of lens unit cells, wherein if uniform light perpendicular to an optical axis of the lens unit cell is incident upon the lens surface, luminance on an emission side of the screen when the screen is observed from a direction inclined against the optical axis of the lens unit lens by a predetermined angle in a horizontal direction when the screen is used is larger than luminance when the screen is observed from a direction inclined by the same angle as that in the horizontal direction in a vertical direction when the screen is used.
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Adachi Keisuke
Yakushiji Kenichi
Arisawa Mfg. Co., Ltd.
Cruz Magda
Osha-Liang LLP
Perkey W. B.
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