Lighting fixtures

Details Lighting fixtures Lighting fixtures

1995-06-07

1997-06-24

Green, Brian K.

Card, picture, or sign exhibiting

Illuminated sign

Edge illuminated

40570, 40581, 362 31, 362293, 362800, G09F 1318

Patent

active

056407920

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.

REFERENCES:
patent: 3591941 (1971-07-01), Jaffe, Jr.
patent: 4385343 (1983-05-01), Plumly
patent: 5020252 (1991-06-01), De Boef
patent: 5251392 (1993-10-01), McManigal
patent: 5276591 (1994-01-01), Hegarty
patent: 5365411 (1994-11-01), Rycroft et al.
Weber, Ernest, Chapter 15 of Part 11 (Eshbach, Standard Book of Engineering Fundamentals, 1975). Vision, "Physiology of Radiation", pp. 1077-1084.
Werner, Ken, Higher Visibility for LEDs, "Advanced Technology/Display," IEEE Spectrum, Jul., 1994, pp. 30-34, 39.
NICHIA LED Blue Light Emitting Diode, NICHIA Chemical Industries, Ltd. publication, (4 pages), dated Mar. 15, 1995.
Kingbright T-13/4 (5mm) Super Bright LED Lamps specifications, pp. 1-223 through 1-225.
LEDs . . . The Efficient Answer to Power-Hungry Incandescent Traffic Signals, Electro-Tech, Anaheim, CA (3 pages).
Hamilton, David P., Japanese Lighting Researcher Hopes to Turn LED Into Gold, "Wall Street Journal", May 10, 1995 (2 pages).

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