Method for fabricating thin panel illuminator

Details Method for fabricating thin panel illuminator Method for fabricating thin panel illuminator

1979-12-26

1981-08-25

Czaja, Donale E.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonmechanical aftertreatment

40546, 264138, 264139, 264162, 264 27, 427289, B29D 1100

Patent

active

042858895

ABSTRACT:
A method for fabricating a thin-panel illuminator for uniform, high contrast lighting of large area graphic displays such as maps, photographs, charts, and the like. Light is introduced through one edge of a transparent substrate having front and back plane parallel opposed surfaces and thereby directed into the interior of the substrate. The back surface is textured with a multiplicity of shallow depressions such as grooves or dimples which have shallow sloped sides such that light is selectively directed from the interior of the substrate through a limited angle out of the substrate towards a display surface adjacent and coextensive with the back surface of the substrate and away from a viewer observing the display surface through the substrate.

REFERENCES:
patent: 4106859 (1978-08-01), Doriguzzi et al.

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