Light guide device and light guide apparatus

Details Light guide device and light guide apparatus Light guide device and light guide apparatus

2011-04-05

2011-04-05

O Shea, Sandra L (Department: 2875)

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

C362S246000, C362S800000, C362S612000, C362S615000, C362S629000

Reexamination Certificate

active

07918573

ABSTRACT:
An aspect of the present invention provides a compact light guide device and a light guide apparatus having high productivity and an even light emission property. A light guide device is made of a translucent material, and LED is disposed in a notch step portion formed by cutting at least a part of an inner peripheral surface, thereby guiding light from LED to emit the light to the outside. Particularly, in a surface and a backside of a sidewall portion of the notch step portion, the sidewall portion facing a light-emitting portion of the light-emitting element, at least an inward surface constitutes a reflecting surface diffusing the light, and a pair of facing surface adjacent to each other on both sides of the sidewall portion constitutes a light acceptance surface receiving the light reflected from the reflecting surface.

REFERENCES:
patent: 2006/0171137 (2006-08-01), Tamaki
patent: 2006/0291183 (2006-12-01), Nishiyama et al.
patent: 1 821 847 (2006-08-01), None
patent: 2006-228635 (2006-08-01), None
patent: 2006-236974 (2006-09-01), None
English abstract of JP2006236974 published Sep. 7, 2006, esp@cenet database, 1 page.
English abstract of JP2006228635 published Aug. 31, 2006, esp@cenet database, 1 page.
European Search Report from Application No. 08150175.1 dated Jul. 1, 2008 (6 pages).

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