LED signal lamp

Details LED signal lamp LED signal lamp

2007-07-03

2007-07-03

Tso, Laura K. (Department: 2875)

Illumination

Plural light sources

Particular wavelength

C362S240000, C362S331000, C362S246000, C362S247000, C362S096000

Reexamination Certificate

active

10461151

ABSTRACT:
An LED signal using a novel optical element to control the light distribution of a small LED light source. Light emitted by the LEDs illuminates the optical element. The optical element has a plurality of clusters, shaped along the x-, y- and z-axis to control the light. After the light is distributed, it encounters a second optical surface of the optical element, typically a fresnel surface. The light is controlled by the optical element.Optionally, a lens can be placed over each LED to control the light pattern of the LED. The lens has an entry face to direct the light to a total internal reflection surface on the side, which redirects the light to the exit face. The resulting signal is a uniform, efficient signal.

REFERENCES:
patent: 4729076 (1988-03-01), Masami et al.
patent: 5947587 (1999-09-01), Keuper et al.
patent: 6054932 (2000-04-01), Gartner et al.
patent: 6283613 (2001-09-01), Schaffer
patent: 6599002 (2003-07-01), Hsieh et al.
patent: 6970296 (2005-11-01), Blumel
U.S. Appl. No. 10/292,333, (Blumel) Signaling Device for Traffic Signals Published Apr. 23, 2003 filed Nov. 12, 2002.
WO 08/052524 (Blumel) LED-Signal Device for Traffic Lights Published Jul. 4, 2002.

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