Light source

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2006-04-11

2006-04-11

Alavi, Ali (Department: 2875)

Illumination

Supported by vehicle structure

Plural light sources

C362S244000, C362S470000

Reexamination Certificate

active

07025484

ABSTRACT:
The invention concerns a light source utilizing an array (20, 50) of light emitting elements (22). The elements may be light emitting diodes. A fresnel prism (32, 56) is disposed in front of the array to receive light from it. The prism serves to divert light from the array along a direction (28, 54) oblique to the array, the diverted light forming an output beam. The array has a depth. The output beam from the prism has a depth which, measured in the same plane as the array depth but perpendicular to the beam direction, is smaller than the depth of the array. Hence a deep array provides a shallower output light beam in a manner which is convenient with regard to packaging requirements.

REFERENCES:
patent: 4185891 (1980-01-01), Kaestner
patent: 4704004 (1987-11-01), Nosker
patent: 5241457 (1993-08-01), Sasajima et al.
patent: 6616299 (2003-09-01), Martineau

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