KR20110003666A - Led light source - Google Patents
Led light source Download PDFInfo
- Publication number
- KR20110003666A KR20110003666A KR1020090061045A KR20090061045A KR20110003666A KR 20110003666 A KR20110003666 A KR 20110003666A KR 1020090061045 A KR1020090061045 A KR 1020090061045A KR 20090061045 A KR20090061045 A KR 20090061045A KR 20110003666 A KR20110003666 A KR 20110003666A
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- light
- led
- light source
- led chip
- optical fibers
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Abstract
Description
The present invention relates to an LED light source having improved light efficiency, and more particularly, to an LED light source having increased light efficiency by concentrating light emitted from an LED chip using a light concentrator.
In the current optical system, the tendency to use a light emitting diode (LED) as a light source is increasing. In particular, LEDs are essential for miniaturization of light sources. In addition, in accordance with the demand for green technology (LED), LED is widely used as a light source.
Light emitting diodes (LEDs) are also called light emitting diodes. The LED produces a small number of carriers (electrons or holes) injected using the p-n junction structure of the semiconductor, and emits light by recombination thereof. Suitable materials for LED are to satisfy the conditions such as high luminous efficiency and the possibility of manufacturing p-n junction. Accordingly, the materials of the LED are mainly gallium arsenide (GaAs), gallium phosphide (GaP), gallium-arsenide-phosphorus (GaAs1-x Px), gallium-aluminum-arsenic (Ga1-xAlxAs), indium phosphide (InP), indium 2-element or 3-element compound semiconductors of Groups 3B and 5B, such as -gallium-phosphorus (ln1-xGaxP), are used. In recent years, research has been made on the use of 2B, 6B, 4A, and 4B as LED materials.
When using the LED as a light source there is a problem that the light efficiency is low. LEDs are basically limited in light efficiency because of high etendue. To solve this problem, the power of the LED is being used up, but this is not a fundamental solution. Therefore, in order to use an LED as a light source, it is necessary to be able to improve the light efficiency of a given power LED.
An object of the present invention is to provide an LED light source that can lower the etendue or improve the light efficiency using the light concentrator.
In order to achieve the above objects, the LED light source according to the embodiment of the present invention includes an LED chip, a light concentrator. The light concentrator is located in front of the light emitting surface of the LED chip. The light concentrator concentrates the light emitted from the LED chip.
In the LED light source according to the embodiment of the present invention, the light concentrator may be a plurality of optical fibers. One end of the plurality of optical fibers is disposed radially in front of the light emitting surface of the LED chip, and the ends are concentrated in one place.
LED light source according to an embodiment of the present invention may further include a curved surface forming portion. The curved portion allows one end of the plurality of optical fibers to be disposed radially. The curved surface forming portion may be a curved shape, a spherical shape, a multi-sided dome shape or a honeycomb shape.
In the LED light source according to the embodiment of the present invention, a plurality of optical fibers may be grouped into at least two optical fiber bundles. Inside each fiber bundle are optical fibers located side by side.
In the LED light source according to the exemplary embodiment of the present invention, the light concentrator may be an elliptical mirror or a parabolic mirror. The elliptical mirror or parabolic mirror is arranged such that the LED chip is located at the first focal point.
The light concentrator of the LED light source according to the exemplary embodiment of the present invention may further include a rod lens. The rod lens passes light reflected from an elliptic mirror or parabolic mirror.
LED light source according to another embodiment of the present invention includes a plurality of LED chips, a plurality of optical fibers. One end of a plurality of optical fibers is disposed radially in front of the light emitting surface of each of the plurality of LED chips, the ends are concentrated in one place.
The present invention can concentrate the light emitted from the LED chip using the light concentrator. Therefore, the light efficiency of an LED light source can be improved.
The light concentrator can also be packaged integrally with the LED chip. Therefore, the size of the LED light source can be reduced, and manufacturing is easy.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted. For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated.
1 is a view conceptually showing an LED light source according to an embodiment of the present invention.
As shown in FIG. 1, the
By concentrating the light at the
The
2 is a view showing that the light concentrator is a plurality of optical fibers in the LED light source according to an embodiment of the present invention.
As shown in FIG. 2, the
Each of the optical fibers in the plurality of
The shape of the curved
Ends of the plurality of
The ability to receive light in an optical fiber is represented by numerical aperture (NA). That is, the larger the numerical aperture, the easier the coupling with the light source. When light is emitted from the optical fiber, it is emitted within the numerical aperture. For example, if the numerical aperture of the optical fiber is 0.2, the angle of light emitted at the end of the optical fiber is 11.54 ° (
)to be.In the present embodiment, if the area of the light emitting surface of the
The
3 is a view showing that a plurality of optical fibers are grouped into an optical fiber bundle in an LED light source according to an embodiment of the present invention.
As shown in FIG. 3, in the LED
When the plurality of optical fibers are grouped and arranged into a plurality of optical fiber bundles, the manufacturing process of the LED
4 is a view showing that the curved surface forming portion is a multi-sided dome shape in the LED light source according to an embodiment of the present invention.
As shown in FIG. 4, in the LED
If the curved
5 is a view showing that the light concentrator in the LED light source according to an embodiment of the present invention is an elliptical mirror.
As shown in FIG. 5A, the LED
The
In another embodiment of the present invention, as shown in FIG. 5B, the LED
The
In other embodiments, the LED light source may be provided with an LED chip and a parabolic mirror. The parabolic mirror is positioned so that the LED chip is located at the first focal point. The light emitted from the LED chip is reflected by a parabolic mirror, producing parallel rays, and the scattered light is collected. Thus, the light efficiency of the LED light source is improved. The LED chip and the parabolic mirror can be packaged integrally. By packaging, the LED light source may have a packaging part.
In another embodiment, the LED light source may further include a rod lens through which the light reflected from the parabolic mirror passes. By providing the rod lens, it is possible to form uniform light at the end of the rod lens. The rod lens can be packaged integrally with a parabolic mirror. In this case, all the rod lenses may be located inside the packaging part. Alternatively, one end of the rod lens may be located inside the packaging part, and the end may be located outside the packaging part.
6 is a view showing an LED light source according to another embodiment of the present invention.
As shown in FIG. 6, the LED
The LED
It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate description of the present invention and to facilitate understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.
1 is a view conceptually showing an LED light source according to an embodiment of the present invention;
2 is a view showing that the light concentrator is a plurality of optical fibers in the LED light source according to one embodiment of the present invention;
3 is a view showing that a plurality of optical fibers are grouped into an optical fiber bundle in an LED light source according to an embodiment of the present invention.
4 is a view showing that the curved surface forming portion is a multi-sided dome shape in the LED light source according to an embodiment of the present invention.
5 is a view showing that the light concentrator in the LED light source according to an embodiment of the present invention is an elliptical mirror.
6 is a view showing an LED light source according to another embodiment of the present invention.
Description of the main parts of the drawing
100, 200, 300, 400, 500: LED light source
LED chip: 110, 210, 310, 410, 510, 610a, 610b, 610c
120:
221, 321, 421: curved
520: elliptical mirror 540: rod lens
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090061045A KR101079133B1 (en) | 2009-07-06 | 2009-07-06 | LED light source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090061045A KR101079133B1 (en) | 2009-07-06 | 2009-07-06 | LED light source |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20110003666A true KR20110003666A (en) | 2011-01-13 |
KR101079133B1 KR101079133B1 (en) | 2011-11-02 |
Family
ID=43611394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020090061045A KR101079133B1 (en) | 2009-07-06 | 2009-07-06 | LED light source |
Country Status (1)
Country | Link |
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KR (1) | KR101079133B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108550685A (en) * | 2018-03-19 | 2018-09-18 | 山东省科学院海洋仪器仪表研究所 | A kind of special LED of chlorophyll fluorescence excitation |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10392669T5 (en) * | 2002-05-17 | 2005-07-07 | Ccs Inc. | A light emitting diode unit and a method of manufacturing a light emitting diode unit |
-
2009
- 2009-07-06 KR KR1020090061045A patent/KR101079133B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108550685A (en) * | 2018-03-19 | 2018-09-18 | 山东省科学院海洋仪器仪表研究所 | A kind of special LED of chlorophyll fluorescence excitation |
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KR101079133B1 (en) | 2011-11-02 |
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