Light optical system, especially for information, advertising illumination or decorative purposes

Patent No. 6,640,029

Inventor: Prejzek; Vaclav (Prague, CZ)
Assignee: Eclair, Spol S R.O. (Prague, CZ)
Issued:  October 28, 2003
Filed: February 12, 2001
PCT Filed: August 10, 1999
PCT NO: PCT/CZ99/00029
PCT PUB.NO.: WO00/09942
PCT PUB. Date: February 24, 2000


An illuminated display and illuminator for illuminating a planar light conductor with a light source. The illuminator has an injector comprising a wedge-shaped body made of transparent material having a refractive index higher than air, the optical interface between the injector and the light conductor being optically homogeneous. The input side of the injector is shaped such that light entering the injector through the input side is brought into focus at a point inside the planar light conductor or behind it. The illuminator also has a light guide located in an optical path between the light source and the input side of the injector, such that light is guided by the lightguide from the light source to the injector; and into the planar light conductor through the optically homogeneous optical interface, and is distributed through the planar light conductor by internal reflection within the body of the planar light conductor.


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