Light guiding film

Details Light guiding film Light guiding film

2010-08-03

2011-10-18

Mahoney, Christopher (Department: 2862)

Optical: systems and elements

Building interior illumination with reflected, refracted or...

Unitary light transmitting member comprising plural...

C359S598000

Reexamination Certificate

active

08040610

ABSTRACT:
A light guiding film has a film body and a micro-structured portion. The film body has a first side, a second side and a reference horizontal level vertical to the second side. The micro-structured portion is set on the second side and has a plurality of V-shaped grooves, and each one of the V-shaped grooves has a first sub-face and a second sub-face. The first sub-face has a first included angle between 16° and 22° with respect to said reference horizontal level, and the second sub-face has a second included angle between 8° and 17° with respect to said reference horizontal level. When an incident light beam injects downwardly on said micro-structured portion in a predetermined incident angle range, a predetermined percentage of said incident light beam emit an emissive light beam projected out in an included angle range between 0° and 90° with respect to said reference horizontal level.

REFERENCES:
patent: 4509825 (1985-04-01), Otto et al.
patent: 4773733 (1988-09-01), Murphy et al.
patent: 7538943 (2009-05-01), Shinbo
patent: 7872801 (2011-01-01), Kojima et al.
patent: 2009/0009870 (2009-01-01), Usami

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