Optical reflector and planar light source device

Illumination – Light modifier – Reflector

Reexamination Certificate

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Details

C362S296040

Reexamination Certificate

active

11282658

ABSTRACT:
Disclosed is a light reflector formed of a white polyolefin film which contains a polyolefin resin and a filler and is oriented at least monoaxially to have an areal draw ratio of from 1.3 to 80 times, which has a whole ray reflectance of at least 95% and undergoes a dimensional change of at most 1.5% when left at 70° C. for 300 hours, and which has a melting-starting temperature of 70° C. or higher. The light reflector hardly causes brightness unevenness of the planar light source when it is built in a planar light source device and used for a long period of time.

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U.S. Appl. No. 11/282,658, filed Nov. 21, 2005, Ueda et al.
U.S. Appl. No. 11/305,167, filed Dec. 19, 2005, Ueda et al.

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