Lighting device used in an exit sign
First Claim
1. A lighting device for illuminating indicia of an EXIT sign having a sign housing defining an enclosure therein and having indicia to be illuminated and having a primary electrical power source, comprising:
- a reflector having a shallow V-shaped contour defining a centrally located valley therein;
said reflector including a first reflective surface on a first side of said valley and a second reflective surface on a second side of said valley; and
illumination means positioned in said valley of said reflector to be powered by the primary electrical power source, said illumination means including two rows of light emitting diodes, each row having a plurality of light emitting diodes, said rows being separated from one another and positioned on either side of said valley for illuminating said reflector V-shaped contour including said valley.
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Accused Products
Abstract
A lighting device (32) is provided to illuminate indicia (18) of an EXIT sign (10) having a sign housing (12) defining an enclosure (22) therein and having a primary electrical power source. The lighting device is provided with a reflector (40) having a shallow V-shaped contour (43,44,45) defining a centrally located valley in the reflector and a source of illumination (42) positioned in the valley of the reflector and powered by the primary power source, the source of illumination including two rows of LEDs (65), each row having a plurality of LEDs, and the rows being separated from one another and positioned on either side of the valley. The LEDs are positioned on either side of the valley (44,45) a sufficient distance from the valley to illuminate the edges of the sign parallel to the valley while preventing areas within the valley from having dark and/or unilluminated spots. The rows of LEDs are mounted on opposite edges of a printed circuit board (70) positioned in the valley of the reflector. A side of the printed circuit (72) board facing the indicia to be illuminated is coated with a reflective material. A modular power supply (36) is provided for attachment to a rear side of the reflector (87) above or below a center line (88) perpendicular to the valley. The modular power supply (36) provides a primary source of power (97), and may also include an emergency electrical power supply (107).
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Citations
27 Claims
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1. A lighting device for illuminating indicia of an EXIT sign having a sign housing defining an enclosure therein and having indicia to be illuminated and having a primary electrical power source, comprising:
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a reflector having a shallow V-shaped contour defining a centrally located valley therein; said reflector including a first reflective surface on a first side of said valley and a second reflective surface on a second side of said valley; and illumination means positioned in said valley of said reflector to be powered by the primary electrical power source, said illumination means including two rows of light emitting diodes, each row having a plurality of light emitting diodes, said rows being separated from one another and positioned on either side of said valley for illuminating said reflector V-shaped contour including said valley. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A lighting device for illuminating indicia of an EXIT sign having a sign housing defining an enclosure therein and having indicia to be illuminated and having a primary electrical power source, comprising;
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a reflector having a shallow V-shaped contour defining a centrally located valley therein;
said reflector including a first reflective surface on a first side of said valley and a second reflective surface on a second side of said valley;illumination/means positioned in said valley of said reflector to be powered by the primary electrical power source, said illumination means including two rows of light emitting diodes, each row having a plurality of light emitting diodes, said rows being separated from one another and positioned on either side of said valley for illuminating said reflector V-shaped contour including said valley; and a power supply module for providing the primary electrical power source to said illumination means, said power supply module being attached to a rear surface of said reflector. - View Dependent Claims (24, 25, 26, 27)
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Specification