LED traffic signal

Details LED traffic signal LED traffic signal

2005-07-29

2009-02-17

O'Shea, Sandra (Department: 2875)

Illumination

Plural light sources

With modifier

C362S249070, C362S326000, C362S545000, C362S800000

Reexamination Certificate

active

07490954

ABSTRACT:
A LED signal includes a housing and a cover. At least one LED is arranged on a PCB and mounted within the housing. A collimator that collimates light energy emitted by the at least one LED is positioned adjacent to the at least one LED. A diffuser is positioned adjacent to the collimator and spreads collimated light transmitted through the collimator. The PCB, the collimator, and the diffuser are disposed between the cover and the housing, and the cover provides a protective barrier between environmental conditions and the collimator and diffuser.

REFERENCES:
patent: 5128848 (1992-07-01), Enders et al.
patent: 5490049 (1996-02-01), Montalan et al.
patent: 6352359 (2002-03-01), Shie et al.
patent: 6799864 (2004-10-01), Bohler et al.
patent: 2002/0034081 (2002-03-01), Serizawa

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