KR100848873B1 - Light emitting diode lamp and method for fabricating the same diode - Google Patents
Light emitting diode lamp and method for fabricating the same diode Download PDFInfo
- Publication number
- KR100848873B1 KR100848873B1 KR1020070032025A KR20070032025A KR100848873B1 KR 100848873 B1 KR100848873 B1 KR 100848873B1 KR 1020070032025 A KR1020070032025 A KR 1020070032025A KR 20070032025 A KR20070032025 A KR 20070032025A KR 100848873 B1 KR100848873 B1 KR 100848873B1
- Authority
- KR
- South Korea
- Prior art keywords
- led chip
- light
- clad
- encapsulation
- resin
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/85909—Post-treatment of the connector or wire bonding area
- H01L2224/8592—Applying permanent coating, e.g. protective coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- Led Device Packages (AREA)
Abstract
Description
1 is a cross-sectional view for explaining a conventional LED lamp.
2 is a cross-sectional view for explaining an LED lamp according to an embodiment of the present invention.
3 is a cross-sectional view for explaining an LED lamp according to another embodiment of the present invention.
<Explanation of symbols for the main parts of the drawings>
21a:
23: cup portion 25: LED chip
27: bonding wire 35: sealing member
35a: exit surface 40: clad member
The present invention relates to an LED lamp, and more particularly to an LED lamp that can obtain a high luminous efficiency by inducing light in the side direction from the LED chip in a desired direction.
LED lamps are widely used for indicators, billboards, and displays because they can realize color, and are also used for general lighting because they can realize white light. Such LED lamps are highly efficient, long-lived and environmentally friendly, and the field of using them continues to increase.
1 is a cross-sectional view illustrating a conventional LED lamp.
Referring to FIG. 1, a conventional LED lamp includes a
The LED chip 5 is mounted in the
On the other hand, the sealing
According to the prior art, the LED lamp can convert the wavelength of the light emitted from the LED chip 5 by the phosphor to implement the light of the required wavelength, for example white light.
However, in the conventional LED lamp, the light emitted from the LED chip 5 in the lateral direction is emitted to the side as it is, and light loss in the unwanted direction is generated. Accordingly, it is difficult to implement the LED lamp of high luminous efficiency by the prior art.
The technical problem to be achieved by the present invention is to provide a LED lamp and a method of manufacturing the same to minimize the light loss in the side direction in the LED chip, and to obtain a high luminous efficiency by inducing light in the desired direction in the desired direction.
In order to achieve the above technical problem, an LED lamp according to an embodiment of the present invention is an LED chip; An encapsulation member formed to cover a periphery of the LED chip; And a clad member formed to block emission of light emitted from the LED chip at the side of the encapsulation member. In this case, the clad member is formed of at least one resin having a lower refractive index than the encapsulation member.
According to an embodiment of the invention, the resin is preferably made of a transparent material. More preferably, the clad member is made of a plurality of resin parts whose refractive index is lowered sequentially from the interface with the encapsulation member. At this time, the side surface of the sealing member is formed as an inclined surface.
Furthermore, the light exit surface of the encapsulation member is made of a lens type.
In addition, the LED lamp manufacturing method according to an embodiment of the present invention comprises the steps of forming an encapsulation member made of a transparent resin around the LED chip; And forming a cladding member for blocking light on the side surface of the encapsulation member, avoiding the light exit surface.
Preferably, the forming of the clad member may include immersing the encapsulation member in a liquid resin having a lower refractive index than the encapsulation member, or sequentially dipping the encapsulation member in a plurality of liquid resins in order of decreasing refractive index.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided as examples to ensure that the spirit of the present invention can be fully conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.
2 is a cross-sectional view for explaining an LED lamp according to an embodiment of the present invention.
Referring to FIG. 2, the LED lamp includes a
The
The
Although the present invention has been described as a lead frame having the first and second leads 21a and 21b, the present invention is not limited thereto, and the present invention is also applicable to a lamp of a lead frame having more leads.
On the other hand, the
The sealing
The side surface of the
The
Accordingly, by the clad
Hereinafter, a method of manufacturing an LED lamp according to an embodiment of the present invention will be described.
Referring back to FIG. 2, first, a lead frame having a
Thereafter, the
The
Subsequently, the
Thereafter, an
Subsequently, the clad
The
Accordingly, by totally reflecting the light in the lateral direction from the
3 is a cross-sectional view illustrating an LED lamp according to another embodiment of the present invention.
The LED lamp according to another embodiment of the present invention shown in FIG. 3 emits all the light emitted from the
However, in the LED lamp according to another embodiment of the present invention, the clad
Referring to FIG. 3, the LED lamp according to another embodiment of the present invention is spaced apart from the
Here, the first and second clad
That is, the first clad
Hereinafter, the LED lamp manufacturing method according to another embodiment of the present invention is the same as the LED lamp manufacturing method of the previous embodiment, the process of forming a clad member on the inclined surface of the sealing
That is, after the sealing
Accordingly, light in the lateral direction from the
In the present exemplary embodiment, the
According to an embodiment of the present invention, by forming a clad member of a resin having a lower refractive index than that of the encapsulating member on the inclined surface of the encapsulating member, the light emitted from the LED chip in the lateral direction is totally reflected at the interface of the encapsulating member so that the light exit surface of the encapsulating member By inducing it has the effect of manufacturing an LED lamp that can obtain a high luminous efficiency without light loss in the side direction of the sealing member.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070032025A KR100848873B1 (en) | 2007-03-30 | 2007-03-30 | Light emitting diode lamp and method for fabricating the same diode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070032025A KR100848873B1 (en) | 2007-03-30 | 2007-03-30 | Light emitting diode lamp and method for fabricating the same diode |
Publications (1)
Publication Number | Publication Date |
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KR100848873B1 true KR100848873B1 (en) | 2008-07-29 |
Family
ID=39825359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020070032025A KR100848873B1 (en) | 2007-03-30 | 2007-03-30 | Light emitting diode lamp and method for fabricating the same diode |
Country Status (1)
Country | Link |
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KR (1) | KR100848873B1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200324610Y1 (en) * | 2003-05-27 | 2003-08-25 | 광전자 주식회사 | LED device having high reflectivity |
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2007
- 2007-03-30 KR KR1020070032025A patent/KR100848873B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200324610Y1 (en) * | 2003-05-27 | 2003-08-25 | 광전자 주식회사 | LED device having high reflectivity |
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