KR20130080613A - Led lighting apparatus using color filter - Google Patents

Led lighting apparatus using color filter Download PDF

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Publication number
KR20130080613A
KR20130080613A KR1020120001503A KR20120001503A KR20130080613A KR 20130080613 A KR20130080613 A KR 20130080613A KR 1020120001503 A KR1020120001503 A KR 1020120001503A KR 20120001503 A KR20120001503 A KR 20120001503A KR 20130080613 A KR20130080613 A KR 20130080613A
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KR
South Korea
Prior art keywords
color filter
light
led
led lighting
lighting apparatus
Prior art date
Application number
KR1020120001503A
Other languages
Korean (ko)
Inventor
김병현
이종찬
최기승
김민수
이승민
장혁진
안경주
Original Assignee
금호전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 금호전기주식회사 filed Critical 금호전기주식회사
Priority to KR1020120001503A priority Critical patent/KR20130080613A/en
Publication of KR20130080613A publication Critical patent/KR20130080613A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/10—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings
    • F21V3/12—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings the coatings comprising photoluminescent substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Abstract

The present invention includes a substrate, at least one LED element mounted on the substrate, and a transmissive color filter disposed on a path of light emitted from the LED element, wherein the color filter includes a fluorescent dye. It relates to an LED lighting device.

Description

LED lighting device using color filter {LED LIGHTING APPARATUS USING COLOR FILTER}

The present invention relates to an LED lighting apparatus, and more particularly to an LED lighting apparatus using a color filter containing a fluorescent dye.

BACKGROUND ART With the development of semiconductor light emitting diodes (LEDs), lighting apparatuses using LEDs that can replace fluorescent or incandescent lamps, which have been conventionally used, have been developed.

1 is a configuration diagram of an LED package according to the prior art. Referring to FIG. 1, in the conventional LED package 100, an LED chip 120 is mounted in a housing 110, and the LED chip 120 is covered with a molding region 130 to achieve stability. In addition, the molding region includes a phosphor, so that the color temperature of the light emitted from the LED chip 120 is converted to light of the required color temperature to be emitted. Yellow-based phosphors are mainly used to convert blue light emitted from LED chips into white light.

The LED lighting apparatus may be manufactured by mounting a plurality of LED packages disclosed in FIG. 1 on a substrate. In this case, a minute color temperature difference may occur depending on the combination of the characteristics of the LED chip and the phosphor for each LED package. This may cause a problem in the uniformity of the light emitted from the LED lighting device. In addition, since there is a need to use a phosphor for each LED package there is a problem that the price increases.

An object of the present invention is to provide an LED lighting device that can improve the uniformity of light at low cost in order to solve the above problems.

The present invention includes a substrate, at least one LED element mounted on the substrate, and a transmissive color filter disposed on a path of light emitted from the LED element, wherein the color filter includes a fluorescent dye. LED lighting device can be provided.

According to the present invention, it is possible to obtain an LED lighting device with improved uniformity of light at a low manufacturing cost.

1 is a configuration diagram of a conventional LED package.
2 is a configuration diagram of an LED lighting apparatus according to an embodiment of the present invention.
3 is a configuration diagram of an LED lighting apparatus according to another embodiment of the present invention.
4 is a configuration diagram of an LED lighting apparatus according to another embodiment of the present invention.
5 is a configuration diagram of an LED lighting apparatus according to another embodiment of the present invention.
6 is a configuration diagram of an LED lighting apparatus according to another embodiment of the present invention.
7 is a configuration diagram of an LED lighting apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a structural diagram of an LED lighting apparatus according to an embodiment of the present invention.

2, the LED lighting apparatus 200 according to the present embodiment may include a substrate 210, an LED element 220, and a color filter 230. The LED lighting apparatus according to the present embodiment may be in the form of a bulb type LED lighting apparatus.

A plurality of LED elements 220 may be mounted on the substrate 210. The substrate 210 may be a PCB substrate having circuit wiring formed therein. The lower surface of the substrate 210 may be formed of a metal to transfer heat generated from the LED device to the housing 240.

The LED device 220 may be in the form of a chip on board (COB) in which an LED bare chip is directly mounted on the substrate, or may be in the form of a package in which the LED chip is mounted in a structure. The LED element used in the present embodiment may be an LED element having a light emission color by the LED chip itself, not an LED element which outputs white light using a phosphor. That is, it may be an LED device emitting one of blue, green, and red colors.

The housing 240 may be divided into a body 241 and a base 242. An upper portion of the body 241 of the housing may support the substrate 210. Heat generated in the LED device 220 by physical contact between the upper portion of the body 241 and the substrate 210 may be transferred to the housing 240 through the substrate 210. In order to increase the thermal conductivity between the body 241 and the substrate 210, an adhesive having good thermal conductivity may be used when the body 241 and the substrate 210 contact each other. In addition, the convex and concave may be formed on the contact surface in order to increase the contact area between the substrate 210 and the body 241. The outer surface of the body 241 of the housing is formed with a concave-convex structure can increase the surface area and increase the heat dissipation efficiency. The base 242 may have a screw structure to couple the LED lighting device 200 to the socket. The base 242 may be an Edison base used in a conventional incandescent lamp. The base 242 is made of a metal component may be supplied with electricity through the socket and to deliver to the LED device. A wire may be formed in the body 241 to electrically connect the base 242 and the LED device 220.

The color filter 230 may include a fluorescent dye and may be disposed on a path of light emitted from the LED device 220. The color filter 230 may serve to convert the color temperature of the emitted light of the LED element 220 into another color temperature to emit light.

The color filter may be formed of a light transmitting material, for example, polycarbonate (PC), and may include a fluorescent dye to change the color temperature of the emitted light of the LED device. In the color filter 230 according to the present embodiment, the fluorescent dye powder may be mixed with a liquid polycarbonate to prepare pellets, and the pellets may be formed into a color filter having a desired shape by an injection process.

The fluorescent dye may be a dye that absorbs light at a first wavelength and emits light having a second wavelength longer than the first wavelength. In the present embodiment, in order for the LED illuminating device 200 to emit white light, the LED element 220 emits blue light in the range of 400 nm to 460 nm, and the fluorescent dye used for the color filter 230 is yellow. Series can be used. Specifically, the fluorescent dye may use one of solvent yellow 98 and solvent yellow 160: 1 manufactured by Dayglo. As such, the white light may be output from the LED lighting apparatus by the emission light of the LED element and the fluorescent dye inside the color filter.

The fluorescent dye used in this embodiment is a material different from the fluorescent substance conventionally used for converting blue LED light into white. In the present embodiment, it is possible to improve the price competitiveness of LED lighting products by using inexpensive fluorescent dyes without using conventional phosphors such as YAG series, Silicate series, and Nitride series.

In the present embodiment, an LED element emitting blue light and a fluorescent dye of yellow series are used, but instead of the blue light LED element, a green light LED element or a red light LED element may be used, and the color filter may be used depending on the color temperature to be output from the LED lighting device. Various kinds of fluorescent dyes can be controlled. That is, the fluorescent dye may be at least one fluorescent dye selected from the group consisting of solvent yellow 98, solvent yellow 160: 1, solvent red 197, solvent red 196, and solvent orange 63.

The color filter 230 may further include a light diffusing material (not shown). The light diffusing material may diffuse the light introduced into the color filter from the LED device. The light diffusing material may spread light evenly in the color filter 230 to prevent the light passing through the color filter from being concentrated to one side in the color filter. As the light diffusing material that can be used in the present embodiment, BaSO 4, polystyrene, crosslinked plastic, or the like can be used. The light scattering coefficient of the color filter may be 0.5 or more by adding the light diffusing material.

The color filter 230 may be combined with the housing 240. The housing 240 and the color filter 230 may be coupled to each other by forming a coupling protrusion on the color filter 230 and a coupling groove corresponding to the coupling protrusion on the upper portion of the housing. In addition, by forming a screw structure corresponding to each of the color filter 230 and the housing 240 may take a rotational coupling method.

3 is a structural diagram of an LED lighting apparatus according to another embodiment of the present invention.

The difference between the embodiment disclosed in FIG. 2 and the embodiment of FIG. 3 is a color filter part, and thus descriptions of overlapping parts will be omitted and the focus will be mainly on the color filter.

In the present embodiment, the color filter 330 may include a first color filter 331 and a second color filter 332.

The first color filter 331 may convert the light emitted from the LED element 320 into first converted light having a different color temperature and output the light. The second color filter 332 may convert the first converted light into second converted light having a different color temperature and output the same. The first converted light may have a longer wavelength than the light emitted from the LED device by the fluorescent dye mixed in the color filter, and the second converted light may have a longer wavelength than the first converted light.

 Each of the first color filter 331 and the second color filter 332 may include different fluorescent dyes or different ratios of fluorescent dyes included in each color filter. By forming the color filter into a plurality of layers and using different fluorescent dyes or different ratios of the fluorescent dyes, the color temperature of the light finally output to the outside from the color filter 330 may be appropriately adjusted.

In the present embodiment, a yellow fluorescent dye may be used for the first color filter 331 and an orange fluorescent dye may be used for the second color filter 332.

When the intrinsic color temperature of the LED element is blue and it is desired to change it to the final white light, when two color filters are used as in the present embodiment, the output light can be obtained much more visually than when one color filter is used. In addition, in the case of using the LED device as a point light source, the point light source can be observed from the outside, and eye fatigue can be felt by using two color filters as in the present embodiment.

In the present embodiment, the first color filter 331 and the second color filter 332 may be formed to be spaced apart by a predetermined interval. The first color filter 331 and the second color filter 332 may be connected to the upper portion of the housing, and the connection portion and the connection method may be different. That is, the first color filter 331 is located inside the screw to be stably coupled to the housing, the second color filter 332 is located outside the screw coupling is easy to attach to the housing. Can be used. In this case, the first conversion light emitted through the first color filter 331 can be used as the basic light, and the second color filter 332 located outside is replaced with a color filter having a different color. The user can select the color temperature of the second converted light as needed.

4 is a structural diagram of an LED lighting apparatus according to another embodiment of the present invention.

The difference between the embodiment disclosed in FIG. 2 and the embodiment of FIG. 4 is a color filter part, and thus descriptions of overlapping parts will be omitted and the focus will be mainly on the color filter.

In the present embodiment, the color filter 430 may include a first color filter 431, a second color filter 432, and a third color filter 433. The first color filter 431, the second color filter 432, and the third color filter 433 may be formed in a plurality of layers in one color filter. The color filter having a plurality of layers may be manufactured using a double injection process, and the number of layers and the thickness of each layer of the color filter may be variously modified.

 The first to third color filters 431, 432, and 433 may include different fluorescent dyes or different ratios of the fluorescent dyes included in each layer. The color temperature of the light output from the color filter 430 may be appropriately adjusted by forming a color filter in a plurality of layers and using different fluorescent dyes or different ratios of fluorescent dyes in each layer.

When the intrinsic color temperature of the LED element is blue and it is desired to change it to the final white light, the output light can be obtained much more visually by using three color filters as in the present embodiment than when one color filter is used. In addition, in the case of using the LED element as a point light source, the point light source can be observed from the outside, and eye fatigue can be felt.

5 is a structural diagram of an LED lighting apparatus according to another embodiment of the present invention.

Referring to FIG. 5, the LED lighting apparatus 500 according to the present embodiment may include a substrate 510, an LED element 520, a color filter 530, a housing 540, and an end cap 550. . The LED illuminating device according to the present embodiment may be in the form of a tube type (fluorescent lamp type) LED illuminating device.

A plurality of LED elements 520 may be mounted on the substrate 510. The substrate 510 may be a PCB substrate having circuit wiring formed therein. The lower surface of the substrate 510 may be formed of a metal to transfer heat generated from the LED device to the housing 540.

The LED device 520 may be in the form of a chip on board (COB) in which an LED bare chip is directly mounted on the substrate, or may be in the form of a package in which an LED chip is mounted in a structure. The LED element used in the present embodiment may be an LED element having a light emission color by the LED chip itself, not an LED element which outputs white light using a phosphor. That is, it may be an LED device having a color temperature of one of blue, green, and red.

An upper portion of the housing 540 may support the substrate 510. Heat generated in the LED device 520 by physical contact between the upper portion of the housing 540 and the substrate 510 may be transferred to the housing 540 through the substrate 510. In order to increase the thermal conductivity between the housing 540 and the substrate 510, an adhesive having good thermal conductivity may be used when the housing 540 and the substrate 510 are bonded to each other. In addition, in order to increase the contact area between the substrate 510 and the housing 540, irregularities may be formed on the contact surface. An uneven structure is formed on the outer surface of the housing 540 to increase the surface area and to improve heat dissipation efficiency.

The color filter 530 may include a fluorescent dye and be disposed on a path of light emitted from the LED device 520. The color filter 530 may serve to convert the color temperature of the emitted light of the LED device 520 into another color temperature to emit light.

The color filter may be formed of a light transmitting material, for example, polycarbonate (PC), and may include a fluorescent dye to change the color temperature of the emitted light of the LED device. In the color filter 530 according to the present embodiment, the fluorescent dye powder may be mixed with a liquid polycarbonate to prepare pellets, and the pellets may be formed into a color filter having a desired shape by an injection process.

The fluorescent dye may be a dye that absorbs light at a first wavelength and emits light at a second wavelength longer than the first wavelength. In the present embodiment, in order for the LED illuminator 500 to emit white light, the LED element 520 emits blue light in the range of 400 nm to 460 nm, and the fluorescent dye used for the color filter 530 is yellow. Series can be used. Specifically, the fluorescent dye may use one of solvent yellow 98 and solvent yellow 160: 1 manufactured by Dayglo. As such, the white light may be output from the LED lighting apparatus by the emission light of the LED element and the fluorescent dye inside the color filter.

As such, the white light may be output by the emission light of the LED element and the fluorescent dye inside the color filter.

In the present embodiment, an LED element emitting blue light and a fluorescent dye of yellow series are used, but instead of the blue light LED element, a green light LED element or a red light LED element may be used, and the color filter may be used depending on the color temperature to be output from the LED lighting device. Various kinds of fluorescent dyes can be controlled.

The fluorescent dye used in this embodiment is a material different from the fluorescent substance conventionally used for converting blue LED light into white. In the present embodiment, it is possible to improve the price competitiveness of LED lighting products by using inexpensive fluorescent dyes without using conventional phosphors such as YAG series, Silicate series, and Nitride series.

In the present embodiment, an LED element emitting blue light and a fluorescent dye of yellow series are used, but instead of the blue light LED element, a green light LED element or a red light LED element may be used, and the color filter may be used depending on the color temperature to be output from the LED lighting device. Various kinds of fluorescent dyes can be controlled. That is, the fluorescent dye may be at least one fluorescent dye selected from the group consisting of solvent yellow 98, solvent yellow 160: 1, solvent red 197, solvent red 196, and solvent orange 63.

The color filter 530 may further include a light diffusing material (not shown). The light diffusing material may diffuse the light introduced into the color filter from the LED device. The light diffusion material may spread light evenly in the color filter 530 to prevent the light passing through the color filter from being concentrated to one side in the color filter. As the light diffusing material that can be used in the present embodiment, BaSO 4, polystyrene, crosslinked plastic, or the like can be used. The light scattering coefficient of the color filter may be 0.5 or more by adding the light diffusing material.

The color filter 530 may be combined with the housing 540. The coupling of the housing 540 and the color filter 530 may be coupled to the coupling by forming a coupling protrusion in the color filter 530 and a coupling groove corresponding to the coupling protrusion in the housing 540. The coupling method of the housing and the color filter may be implemented in various forms.

The end cap 550 may be coupled to both ends of the housing and the color filter. Two terminals 551 may be formed in the end cap 550, and the terminals may be connected to a circuit wiring on the substrate 510 by a connection wiring. By the terminal 551, the lighting apparatus of the present embodiment can receive power from the outside. In the present embodiment, the terminal may have the same shape and size as the terminal of a conventional hot cathode fluorescent lamp. Therefore, it is possible to remove the conventional fluorescent lamp and to combine the fluorescent lamp type LED lighting apparatus according to the present embodiment.

6 is a structural diagram of an LED lighting apparatus according to another embodiment of the present invention.

Since the difference between the embodiment disclosed in FIG. 5 and the embodiment of FIG. 6 is a color filter part, a description of overlapping parts will be omitted and the focus will be mainly on the color filter.

In the present embodiment, the color filter 630 may include a first color filter 631 and a second color filter 632.

The first color filter 631 may convert the light emitted from the LED element 620 into first converted light having a different color temperature and output the light. The second color filter 632 may convert the first converted light into second converted light having a different color temperature and output the same.

 Each of the first color filter 631 and the second color filter 632 may include different fluorescent dyes or different ratios of the fluorescent dyes included in each color filter. By forming the color filter into a plurality of layers and using different fluorescent dyes or different ratios of the fluorescent dyes, the color temperature of the light finally output to the outside from the color filter 630 may be appropriately adjusted.

In the present embodiment, a yellow fluorescent dye may be used for the first color filter 631, and an orange fluorescent dye may be used for the second color filter 632.

When the intrinsic color temperature of the LED element is blue and it is desired to change it to the final white light, when two color filters are used as in the present embodiment, the output light can be obtained much more visually than when one color filter is used. In addition, in the case of using the LED device as a point light source, the point light source can be observed from the outside, and eye fatigue can be felt by using two color filters as in the present embodiment.

In the present embodiment, the first color filter 631 and the second color filter 632 may be formed to be spaced apart by a predetermined interval. The first color filter 631 and the second color filter 632 may be connected to an upper portion of the housing, and each connection part and a connection method may be different. In this case, the user can use the first converted light emitted through the first color filter as the basic light, and replace the second color filter 632 located outside with a color filter having a different color. If necessary, the color temperature of the second converted light can be selected.

7 is a structural diagram of an LED lighting apparatus according to another embodiment of the present invention.

The difference between the embodiment disclosed in FIG. 5 and the embodiment of FIG. 7 is a color filter part, and thus descriptions of overlapping parts will be omitted and the focus will be mainly on the color filter.

In the present embodiment, the color filter 730 may include a first color filter 731, a second color filter 732, and a third color filter 733. The first color filter 731, the second color filter 732, and the third color filter 733 may be formed in a plurality of layers in one color filter. The color filter having a plurality of layers may be manufactured using a double injection process, and the number of layers and the thickness of each layer of the color filter may be variously modified.

The first to third color filters 731, 732, and 733 may include different fluorescent dyes or different ratios of fluorescent dyes included in each layer. The color temperature of the light output from the color filter 730 may be appropriately adjusted by forming a color filter in a plurality of layers and using different fluorescent dyes or different ratios of fluorescent dyes in each layer.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

210: substrate 220: LED element
230: color filter 240: housing

Claims (9)

Board;
At least one LED device mounted on the substrate; And
Transmissive color filter disposed on the path of light emitted from the LED element
Including;
LED lighting device, characterized in that the color filter comprises a fluorescent dye.
The method of claim 1,
The fluorescent dye is
LED lighting device comprising at least one dye selected from the group consisting of solvent yellow 98, solvent yellow 160: 1, solvent red 197, solvent red 196, and solvent orange 63.
The method of claim 1,
The color filter,
A first color filter converting the emitted light of the LED element into first converted light; And
A second color filter converting light emitted from the first color filter into second converted light
LED lighting apparatus comprising a.
The method of claim 3,
The first color filter and the second color filter
LED lighting apparatus, characterized in that spaced at a predetermined interval.
The method of claim 3,
The first color filter and the second color filter,
LED lighting device, characterized in that formed in one fixture.
The method of claim 1,
The color filter,
Light diffusing material for diffusing the light incident from the LED element to the front of the color filter
LED lighting apparatus comprising a further.
The method of claim 1,
A body supporting the substrate and the color filter; And
A base formed at an end of the body and making a mechanical electrical connection with an external socket
LED lighting apparatus comprising a.
The method of claim 7, wherein
The color filter,
A first color filter converting the emitted light of the LED element into first converted light; And
A second color filter converting light emitted from the first color filter into second converted light
Including;
The first color filter is screwed with the body,
The second color filter is LED lighting device characterized in that the screw coupling with the body.
The method of claim 1,
A body on which the substrate is mounted;
End caps disposed on both sides of the substrate; And
External connection pin formed on the end cap
LED lighting apparatus comprising a further.
KR1020120001503A 2012-01-05 2012-01-05 Led lighting apparatus using color filter KR20130080613A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200054646A (en) 2018-11-12 2020-05-20 황현선 Advertising light using variable color luminaire

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KR19990063720A (en) * 1995-09-29 1999-07-26 스프레이그 로버트 월터 Fluorescent dye formulations
JP3167641B2 (en) * 1997-03-31 2001-05-21 和泉電気株式会社 LED bulb
JP2007080872A (en) * 2005-09-09 2007-03-29 Matsushita Electric Works Ltd Light emitting device
US20100118511A1 (en) * 2008-11-07 2010-05-13 James Wegat Lighting systems
JP2010186725A (en) * 2009-01-15 2010-08-26 Mitsubishi Electric Corp Illumination device
KR20110005713U (en) * 2009-12-02 2011-06-10 김장오 Bar type LED lamp
US20110215696A1 (en) * 2010-03-03 2011-09-08 Cree, Inc. Led based pedestal-type lighting structure
WO2011108203A1 (en) * 2010-03-01 2011-09-09 パナソニック株式会社 Led lamp, led illumination device, and led module

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Publication number Priority date Publication date Assignee Title
KR19990063720A (en) * 1995-09-29 1999-07-26 스프레이그 로버트 월터 Fluorescent dye formulations
JP3167641B2 (en) * 1997-03-31 2001-05-21 和泉電気株式会社 LED bulb
JP2007080872A (en) * 2005-09-09 2007-03-29 Matsushita Electric Works Ltd Light emitting device
US20100118511A1 (en) * 2008-11-07 2010-05-13 James Wegat Lighting systems
JP2010186725A (en) * 2009-01-15 2010-08-26 Mitsubishi Electric Corp Illumination device
KR20110005713U (en) * 2009-12-02 2011-06-10 김장오 Bar type LED lamp
WO2011108203A1 (en) * 2010-03-01 2011-09-09 パナソニック株式会社 Led lamp, led illumination device, and led module
US20110215696A1 (en) * 2010-03-03 2011-09-08 Cree, Inc. Led based pedestal-type lighting structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200054646A (en) 2018-11-12 2020-05-20 황현선 Advertising light using variable color luminaire

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