Spread illuminating apparatus with light scattering means

Details Spread illuminating apparatus with light scattering means Spread illuminating apparatus with light scattering means

2005-10-18

2005-10-18

Alavi, Ali (Department: 2875)

Illumination

Light modifier

Refractor

C362S035000, C362S555000

Reexamination Certificate

active

06955453

ABSTRACT:
In a spread illuminating apparatus comprising a light conductive plate, and at least one spot-like light source disposed close to a light entrance surface thereof, the light conductive plate has, on its light exit surface, a light scattering means comprising a plurality of mechanisms which are each formed so as to extend in a direction perpendicular to the light entrance surface, and which are adapted to scatter the light emitted from the at least one spot-like light source with respect to the direction parallel to the light entrance surface. The mechanisms of the light scattering means each consist of either paired slanting surfaces, a ridge with its surface arced in cross section, or a ridge multifaceted forming a polygonal cross section. The surfaces of the mechanisms may be roughened with a plurality of grooves, thereby achieving a further uniform illumination.

REFERENCES:
patent: 5854872 (1998-12-01), Tai
patent: 6827456 (2004-12-01), Parker et al.
patent: 2004/0246697 (2004-12-01), Yamashita et al.
patent: A 10-293202 (1998-11-01), None
patent: A 11-287993 (1999-10-01), None

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