Surface light source device and light guide used therefor

Details Surface light source device and light guide used therefor Surface light source device and light guide used therefor

2007-06-05

2007-06-05

Luebke, Renee (Department: 2875)

Illumination

Edge lighted panel

Light modifier for edge lit light source

C362S330000, C362S331000, C362S339000

Reexamination Certificate

active

10511983

ABSTRACT:
A light guide which guides light emitted from an LED includes a light incident end surface for receiving light, a light outputting surface for outputting a guided light, and a lens forming surface that has a plurality of elongated lenses arranged in parallel to each other and formed along the directivity of light incident from the LED, such that a plurality of micro regions are defined over the plurality of elongated lens. In the vicinity of the LED, a distribution of micro regions having an inclination angle between 20° and 50° is at least 10% over all micro regions. A light deflection element disposed adjacent to the light guide light outputting surface includes a light entrance surface having a plurality of lenses formed thereon that are parallel to each other and extend in a direction parallel to the light guide light incident end surface.

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