Optical: systems and elements – Projection screen – Embedded particles
Reexamination Certificate
2007-05-29
2007-05-29
Perkey, W. B. (Department: 2851)
Optical: systems and elements
Projection screen
Embedded particles
C359S452000, C359S457000, C359S460000
Reexamination Certificate
active
10937113
ABSTRACT:
Disclosed are a light transmission sheet and a screen that can realize good color reproduction while suppressing a lowering in light transmittance. The light transmission sheet comprises a light diffusing sheet and/or a colored sheet. The light diffusing sheet and/or the colored sheet comprise light diffusing fine particles dispersed in a light transparent matrix and satisfy formula (1):in-line-formulae description="In-line Formulae" end="lead"?−0.5%≦T1−T2≦5% (1)in-line-formulae description="In-line Formulae" end="tail"?wherein T1 represents light transmittance at a wavelength of 450 nm, %; and T2 represents light transmittance at a wavelength of 600 nm, %. A light diffusing sheet and/or colored sheet for a screen are also disclosed. The screen comprises the light diffusing sheet and/or colored sheet for a screen.
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patent: 5914809 (1999-06-01), Mitani et al.
patent: 6124969 (2000-09-01), Funazaki et al.
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patent: 2004-037671 (2004-05-01), None
patent: 2004-219809 (2004-05-01), None
Cruz Magda
Dai Nippon Printing Co. Ltd.
Harness & Dickey & Pierce P.L.C.
Perkey W. B.
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