Illumination device for simulating neon lighting through use of fluorescent dyes

A lighting device and fluorescent dye technology, applied in lighting devices, non-electric lighting devices, portable lighting devices, etc., can solve problems such as the limitation of visible color spectrum

Inactive Publication Date: 2005-10-05
ILIGHT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, one problem with lighting devices using leaky waveguides and LEDs as described and claimed in U.S. Patent Application 09 / 982705 is that the available visible color spectrum is limited by the limited choice of LED colors

Method used

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  • Illumination device for simulating neon lighting through use of fluorescent dyes
  • Illumination device for simulating neon lighting through use of fluorescent dyes
  • Illumination device for simulating neon lighting through use of fluorescent dyes

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] In a first example, lighting device 10 is configured to have a length L of approximately 4.75 inches and have a cross-section as shown in FIG. 3 . The light source 16 is a series of 9 high intensity LEDs placed in series with a spacing of approximately 0.50 inches. More importantly, the LEDs in this case are blue, and the wavelength of light emitted by them is about 470nm, and the color coordinates on the CIE chromaticity diagram are x≈0.111 and y≈0.058.

[0041] LEDs operate at about 20mA. To simplify the manufacturing and assembly process, it is preferred that the LEDs be operated at substantially constant current and electrical power. However, by varying the current, the resulting perceived color may be affected.

[0042] Finally, referring again to FIG. 3, the intermediate light transmissive medium 22 in this example has a height H of about 0.625 inches, a width W of about 0.375 inches, and substantially the same length as the lighting device, ie, 4.75 inches long...

example 2

[0048] In this example, lighting device 10 is configured to have a length L of approximately 4.625 inches and also has a cross-section similar to that shown in FIG. 3 . The light source 16 is a series of nine high intensity LEDs spaced about 0.50 inches apart, operating at about 20 mA. Furthermore, the LEDs are still blue in this example, they emit light with a wavelength of about 470nm, and have color coordinates of x≈0.111 and y≈0.058 on the CIE chromaticity diagram.

[0049] Referring again to FIG. 3, the intermediate light transmissive medium 22 in this example has a height H of approximately 0.375 inches, a width W of approximately 0.1875 inches, and substantially the same length as the lighting device, ie, 4.625 inches long. The intermediate light transmitting medium 22 is composed of substantially transparent polyurethane dyed with a combination of fluorescent dyes according to the following proportions:

[0050] Mass (grams)

[0051] When the preferred lig...

example 3

[0053] In this example, lighting device 10 is configured to have a length L of approximately 3.00 inches and also has a cross-section similar to that shown in FIG. 3 . The light source 16 is a series of six high intensity LEDs spaced approximately 0.50 inches apart, operating at approximately 20 mA. Furthermore, the LEDs are also blue in this example, emitting light with a wavelength of approximately 470nm and having color coordinates of x≈0.111 and y≈0.058 on the CIE chromaticity diagram.

[0054] Referring again to FIG. 3, the intermediate light transmissive medium 22 in this example has a height H of approximately 0.400 inches, a width W of approximately 0.1875 inches, and substantially the same length as the lighting device, ie, 3.00 inches long. The intermediate light transmitting medium 22 is composed of substantially transparent polyurethane coated with fluorescent dyes according to the following proportions:

[0055] Mass (grams)

Polyurethane

...

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Abstract

An illumination device simulates neon lighting and allows for emission of light in colors that cannot ordinarily be achieved by use of LEDs alone through the incorporation of a light color conversion system into the illumination device. This light color conversion system comprises an intermediate light-transmitting medium tinted with a predetermined combination of one or more fluorescent dyes. Light emitted from the light source of the illumination device is directed into the intermediate light-transmitting medium and interacts with the fluorescent dyes contained therein. This light is partially absorbed by each of the fluorescent dyes of the intermediate light-transmitting medium, and a lower-energy light is then emitted from each of the fluorescent dyes and into the light-receiving surface of the waveguide. Thus, selection of appropriate combinations of dyes results in various colors being emitted from the illumination device.

Description

[0001] Related applications for reference [0002] This application claims priority to U.S. Provisional Application Serial No. 60 / 387076, filed June 6, 2003, and is a continuation-in-part of U.S. Utility Application Serial No. 09 / 982705, filed October 18, 2001, Both of the aforementioned applications are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to a lighting device that uses a high-brightness, low-voltage light source to simulate neon lighting, and a lighting device that is ideally suited for lighting, signage, and advertising purposes. Background technique [0004] Neon illumination, achieved by the electrical excitation of electrons in a glass tube filled with low-pressure neon gas, has been prominent in advertising for many years and is used to display tunnel letters and the outlines of architectural structures. A characteristic of neon lighting is that the tube surrounding the gas glows uniformly over its...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21S4/00F21V1/00F21V8/00F21V9/08F21V9/16F21Y101/02G09F13/20H01L33/48H01L33/50H01L33/60
CPCF21S4/003G02B6/001G02B6/0005F21V9/16F21Y2101/02F21S4/20F21Y2115/10F21V9/30F21V9/06
Inventor 乔治·R·赫尔斯约翰·R·多米尼克马克·J·克利弗埃里克·O·埃里克松
Owner ILIGHT TECH INC
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