Lighting fixtures
First Claim
Patent Images
1. A lighting fixture, comprising:
- a. a housing comprising structure for mounting to a supporting surface;
b. a plurality of light emitting diodes contained within the housing, at least one of which is adapted to emit light energy of predominantly blue wavelengths;
c. at least one indicium associated with the housing for imparting information, the indicium comprising transformation material which, upon receipt of and excitation by the light energy of predominantly blue wavelengths, emits light of predominantly green wavelenghts.
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0 Petitions
Accused Products
Abstract
Lighting fixtures which feature indicia illuminated more uniformally and with greater brightness than in conventional lighting fixtures. LEDs which operate at a higher frequency/shorter wavelength, such as blue LEDs, emit light which causes the transformation material to reemit, reradiate or emit light at a lower frequency/longer wavelength with increased brightness and uniformity. In a preferred embodiment of the lighting fixtures, blue LEDs cause the transformation material to emit green light for bright and even illumination of indicia such as letters and chevrons in exit signs, and at a wavelength to which the human eye is serendipitously sensitive.
113 Citations
20 Claims
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1. A lighting fixture, comprising:
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a. a housing comprising structure for mounting to a supporting surface; b. a plurality of light emitting diodes contained within the housing, at least one of which is adapted to emit light energy of predominantly blue wavelengths; c. at least one indicium associated with the housing for imparting information, the indicium comprising transformation material which, upon receipt of and excitation by the light energy of predominantly blue wavelengths, emits light of predominantly green wavelenghts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lighting fixture, comprising:
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a. a housing comprising structure for mounting to a supporting surface and a plurality of light emitting diodes adapted to emit light of predominantly 420 to 470 nanometer wavelength; b. a substantially clear panel extending from the housing and comprising at least one indicium for imparting information; and c. a screen comprising transformation material which, upon receipt of an excitation by the light of predominantly 420 to 470 nanometer wavelengths, emits light of predominantly 490 to 550 nanometer wavelengths, which screen is interposed in the housing between the light emitting diodes and the indicium. - View Dependent Claims (10, 11, 12)
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13. A lighting fixture which employs long life, low power lighting emitting diodes to illuminate indicia with maximum brightness and in wavelengths corresponding substantially to those to which the human eye is most sensitive, comprising:
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a. a housing comprising structure for connection to a supporting surface; b. at least one indicium associated with the housing, the indicium comprising transformation material which is adapted to emit light in wavelengths of predominantly 500 to 580 nanometers when excited by light of shorter wavelengths; c. a plurality of light emitting diodes adapted to emit light in a blue portion of a spectrum of wavelengths corresponding substantially to those to which the human eye is sensitive which, upon striking the transformation material, causes the transformation material to radiate light in a green portion of the spectrum. - View Dependent Claims (14, 15)
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16. A lighting fixture comprising:
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a. a housing; b. a light emitting diode contained within the housing that is adapted to emit predominantly blue light energy; c. an indicium for imparting information, which indicium is in light communication with the light emitting diode; d. a transformation material disposed between the light emitting diode and the indicium that, upon receiving and being excited by the predominantly blue light energy, emits predominantly green light energy. - View Dependent Claims (17, 18, 19, 20)
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Specification