Light diffusive protective film

Details Light diffusive protective film Light diffusive protective film

2005-07-05

2005-07-05

Tso, Laura K. (Department: 2875)

Illumination

Revolving

C359S599000, C359S566000, C359S708000, C385S141000

Reexamination Certificate

active

06913365

ABSTRACT:
A light diffusive protective film for a surface light source device for protecting other base material and improving the luminance of information display is disclosed which comprises a transparent plastic film and a concave/convex layer stacked on the surface of the transparent plastic film and satisfies requirements that: (1) the ten-point mean roughness of the uneven surface in the concave/convex layer is 0.5 μm to 2.0 μm; and (2) the count number of profile peaks is 16 to 60 as determined by measuring a roughness curve for the uneven surface of the concave/convex layer and determining the count number of profile peaks by a peak count method.

REFERENCES:
patent: 6445504 (2002-09-01), Suga et al.
patent: 6505959 (2003-01-01), Masaki et al.
patent: 6639725 (2003-10-01), Masaki et al.
patent: 2003/0214719 (2003-11-01), Bourdelais et al.
patent: 7-234305 (1995-09-01), None

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