Light-emitting diode based traffic light

Details Light-emitting diode based traffic light Light-emitting diode based traffic light

2007-10-16

2007-10-16

O'Shea, Sandra (Department: 2875)

Illumination

Plural light sources

With modifier

C362S800000, C362S802000, C362S296040, C362S346000, C349S039000, C349S032000

Reexamination Certificate

active

11258428

ABSTRACT:
A traffic light includes a circuit board on which linear arrays of light-emitting diodes (LEDs) are mounted in a V-shaped arrangement, an inner cover having a first inner surface facing the LEDs to receive light from the LEDs and an opposite, first outer surface forming elongate prisms inclined with respect to a predetermined axis at a predetermined angle of 65-80 degrees, and a front cover having a second inner surface facing the first outer surface of the inner cover to receive the light from the inner cover, and an opposite, second outer surface through which the light is further projected out of the traffic light. The second inner surface of the front cover forms a honeycomb structure including a plurality of hexagonal lens blocks, each composed of an array of individual lens segments.

REFERENCES:
patent: 4384271 (1983-05-01), Visser
patent: 5580156 (1996-12-01), Suzuki et al.
patent: 6707435 (2004-03-01), Merlato et al.

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