JPH06204567A - Manufacture of surface-mount type led - Google Patents

Manufacture of surface-mount type led

Info

Publication number
JPH06204567A
JPH06204567A JP4359886A JP35988692A JPH06204567A JP H06204567 A JPH06204567 A JP H06204567A JP 4359886 A JP4359886 A JP 4359886A JP 35988692 A JP35988692 A JP 35988692A JP H06204567 A JPH06204567 A JP H06204567A
Authority
JP
Japan
Prior art keywords
resin
led
lead frame
lens
led chip
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP4359886A
Other languages
Japanese (ja)
Inventor
Takeo Itou
多計夫 伊藤
Kenichi Yoshida
健一 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
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.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP4359886A priority Critical patent/JPH06204567A/en
Publication of JPH06204567A publication Critical patent/JPH06204567A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting 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
    • H01L2224/48221Connecting 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
    • H01L2224/48245Connecting 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
    • H01L2224/48247Connecting 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

Landscapes

  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Led Device Packages (AREA)

Abstract

PURPOSE:To provide a method for manufacturing a surface-mount type LED by which an emission efficiency can be improved at low cost by a simple structure. CONSTITUTION:A surface-mount type LED 10 has two lead frames 11, 12, a LED chip 13 which is mounted on an upper end face of one of the lead frames and is connected to an upper end of the other lead frame, a base section 14 which covers an upper area of each lead frame, and a lens section 15 which covers the upper end face of each lead frame and the LED chip. First, the lens section 15, in an upside down condition, is inserted into epoxy resin which has been poured into a die, to be resin-molded. At that time, a lower face of the lens section is expanded downwards due to surface tension of the epoxy resin. After that, the base section 14 is resin-molded with resin material including pigment.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、LEDチップから出
射する光を該LEDチップの周辺に設けられた凹状の反
射面により反射させて発光効率を高めるようにした表面
実装型LEDの製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a surface-mounted LED in which light emitted from an LED chip is reflected by a concave reflecting surface provided in the periphery of the LED chip to enhance luminous efficiency. It is a thing.

【0002】[0002]

【従来の技術】従来、表面実装型LEDは、例えば図4
に示すように構成されている。即ち、表面実装型LED
1は、実質的に上下に平行に延びる二本のリードフレー
ム2,3と、該リードフレームのうち一方のリードフレ
ーム2の拡大された上端面2aに取り付けられるLED
チップ4と、リードフレーム2,3の下端領域を覆うよ
うに一体成形されたベース部5と、LEDチップ4及び
ベース部5の上方に透明樹脂の樹脂モールドにより成形
されたレンズ部6とから構成されている。
2. Description of the Related Art Conventionally, surface mount LEDs have been shown in FIG.
It is configured as shown in. That is, surface mount LED
Reference numeral 1 denotes an LED that is attached to two lead frames 2 and 3 extending substantially in parallel in the vertical direction and an enlarged upper end surface 2a of one of the lead frames 2.
A chip 4, a base portion 5 integrally formed so as to cover the lower end regions of the lead frames 2 and 3, and a lens portion 6 formed above the LED chip 4 and the base portion 5 by resin molding of transparent resin. Has been done.

【0003】この場合、一方のリードフレーム2の上端
面2aには、図示のように、反射効果を高めるために、
皿状の反射部材7が形成されており、上記LEDチップ
4はこの反射部材7の上端面7a上にダイボンディング
等により固定され且つこのリードフレーム2と電気的に
接続されていると共に、他方のリードフレーム3の上端
面3aに対してワイヤボンディングにより電気的に接続
されている。
In this case, on the upper end surface 2a of one of the lead frames 2, in order to enhance the reflection effect, as shown in the figure,
A dish-shaped reflecting member 7 is formed, and the LED chip 4 is fixed on the upper end surface 7a of the reflecting member 7 by die bonding or the like and is electrically connected to the lead frame 2 while the other It is electrically connected to the upper end surface 3a of the lead frame 3 by wire bonding.

【0004】このような構成の表面実装型LED1によ
れば、二つのリードフレーム2,3の下方のリード部を
介してLEDチップ4に給電が行なわれるとこのLED
チップ4が発光せしめられる。これにより、LEDチッ
プ4から出射した光は、一部がそのまま上方へ進み、ま
た一部が反射部材7の上端面7aにて反射せしめられた
後、上方に進んで、レンズ部6の作用により集光されな
がら、外部へ出射するようになっている。
According to the surface-mounted LED 1 having such a structure, when power is supplied to the LED chip 4 via the lead portions below the two lead frames 2 and 3, the LED chip 4 is supplied with electric power.
The chip 4 is made to emit light. As a result, a part of the light emitted from the LED chip 4 proceeds upward as it is, and a part of the light is reflected by the upper end surface 7 a of the reflecting member 7, and then proceeds upward, and by the action of the lens portion 6. The light is emitted to the outside while being collected.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、このよ
うな表面実装型LED1においては、反射部材7をあま
り大きくすることができないため、LEDチップ4から
の光のうち、上方へ進んでレンズ部6を介して外部に出
射する光は一部分であることから、他の方向に出射する
光は利用され得ないことになる。従って、外部に出射す
る光量が比較的小さくなってしまい、発光効率が比較的
低くなってしまうという問題があった。
However, in such a surface-mounted LED 1, since the reflecting member 7 cannot be made too large, the light from the LED chip 4 proceeds upward to the lens portion 6. Since the light emitted to the outside through a portion is a part, the light emitted in other directions cannot be used. Therefore, there is a problem that the amount of light emitted to the outside becomes relatively small and the light emission efficiency becomes relatively low.

【0006】この発明は、以上の点に鑑み、簡単な構成
により低コストで、発光効率が向上され得るようにし
た、表面実装型LEDの製造方法を提供することを目的
としている。
In view of the above points, an object of the present invention is to provide a method for manufacturing a surface-mount LED, which has a simple structure and can improve the luminous efficiency at low cost.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するた
め、この発明では、二本のリードフレームと、該リード
フレームの一方の上端面に取り付けられ且つその上面が
他方のリードフレームの上端に対して接続されているL
EDチップと、各リードフレームの上端領域を覆うよう
に成形されたベース部と、このベース部の上方にて、各
リードフレームの上端面及びLEDチップを包囲するよ
うに樹脂モールドにより形成されたレンズ部とを含んで
いる表面実装型LEDにおいて、先ずレンズ部を、逆さ
まの状態にて型内に流し込んだエポキシ樹脂中に挿入す
ることにより樹脂モールド成形し、その際、エポキシ樹
脂の表面張力によってレンズ部の下面が下方に向かって
凸状に形成され、その後、ベース部を、顔料を含んだ樹
脂材料により樹脂モールド成形することにより表面実装
型LEDを製造するものである。
In order to achieve the above object, according to the present invention, two lead frames are attached to one upper end surface of the lead frame and the upper surface thereof is relative to the upper end of the other lead frame. Connected by L
An ED chip, a base part formed so as to cover the upper end region of each lead frame, and a lens formed above the base part by resin molding so as to surround the upper end face of each lead frame and the LED chip. In a surface-mount LED including a lens part, the lens part is first resin-molded by inserting the lens part upside down into the epoxy resin poured into the mold, and at that time, the lens is formed by the surface tension of the epoxy resin. The lower surface of the portion is formed to be convex downward, and then the base portion is resin-molded with a resin material containing a pigment to manufacture a surface-mounted LED.

【0008】[0008]

【作用】上記構成によれば、レンズ部の下面がこのレン
ズ部の樹脂モールド成形時に、樹脂の表面張力に基づい
て下方に向かって凸状に形成されることになり、その後
この凸状に形成された下面に対して、顔料を含んだ樹脂
材料によりベース部が隣接して樹脂モールド成形される
ので、上記レンズ部の下面はこのレンズ部内からの光に
対して、比較的大きな口径の凹面鏡として作用すること
になる。従って、樹脂材料の表面張力を利用することに
より、簡単な構成で比較的大きな口径の反射面を構成し
得ることになり、低コストで発光効率が向上することが
できる。
According to the above construction, the lower surface of the lens portion is formed in a convex shape downward due to the surface tension of the resin when the lens portion is resin-molded, and then formed in the convex shape. Since the base portion is adjacently resin-molded with the resin material containing the pigment, the lower surface of the lens portion serves as a concave mirror having a relatively large aperture with respect to light from inside the lens portion. Will work. Therefore, by utilizing the surface tension of the resin material, it is possible to form a reflecting surface having a relatively large diameter with a simple structure, and the luminous efficiency can be improved at low cost.

【0009】[0009]

【実施例】以下、図面に示した実施例に基づいてこの発
明を詳細に説明する。図1はこの発明による方法により
製造されたLEDの一実施例を示しており、LED10
は、実質的に上下に平行に延びる二本のリードフレーム
11及び12と、該リードフレームのうち一方のリード
フレーム11の拡大された上端面11aに取り付けられ
るLEDチップ13と、これらのリードフレーム11,
12の上端領域を覆うように成形されたベース部14
と、上記LEDチップ13及びベース部14の上方に透
明樹脂の樹脂モールドにより成形されたレンズ15とか
ら構成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows an embodiment of an LED manufactured by the method according to the present invention.
Are two lead frames 11 and 12 extending substantially in parallel vertically, an LED chip 13 attached to the enlarged upper end surface 11a of one of the lead frames 11, and the lead frames 11 and 12. ,
Base portion 14 formed to cover the upper end region of 12
And a lens 15 formed by resin molding of transparent resin above the LED chip 13 and the base portion 14.

【0010】この場合、ベース部14とレンズ部15の
境界面は、上方に向かって凹状に形成されており、比較
的口径の大きな反射鏡16として構成されている。
In this case, the boundary surface between the base portion 14 and the lens portion 15 is formed in a concave shape upward, and is configured as a reflecting mirror 16 having a relatively large aperture.

【0011】また、一方のリードフレーム11の上端面
11aには、上記LEDチップ13がダイボンディング
等により固定され且つこのリードフレーム11と電気的
に接続されていると共に、他方のリードフレーム12の
上端面12aに対してワイヤボンディングにより電気的
に接続されている。
The LED chip 13 is fixed to the upper end surface 11a of one of the lead frames 11 by die bonding or the like and is electrically connected to the lead frame 11, and on the other lead frame 12. It is electrically connected to the end face 12a by wire bonding.

【0012】ここで、上記レンズ部15及びベース部1
4は、以下のように形成される。即ち、レンズ部15
は、図2に示すように型17内にLEDチップ13を実
装したリードフレーム11,12を逆さまにして挿入
し、所定位置にて固定する。この状態から、先ず、この
型17内にエポキシ樹脂を一定量注入して、レンズ部1
5を樹脂モールド成形する。これにより、エポキシ樹脂
は表面張力によって中央付近が盛り上がることになり、
レンズ部15の下面が下方に向かって凸状に形成される
ことになる。
Here, the lens portion 15 and the base portion 1
4 is formed as follows. That is, the lens unit 15
As shown in FIG. 2, the lead frames 11 and 12 mounted with the LED chips 13 are inserted into the mold 17 upside down and fixed at a predetermined position. From this state, first, a certain amount of epoxy resin is injected into the mold 17 to make the lens part 1
5 is resin molded. As a result, the epoxy resin will rise around the center due to surface tension,
The lower surface of the lens portion 15 is formed to be convex downward.

【0013】このとき、型17内のレンズ部15に対応
する部分17aと、ベース部14に対応する部分17b
との間の段部17cは、斜めに面取りされたカット部1
7dを備えている。したがって、一般にエポキシ樹脂
は、表面張力によって型17の内壁に対して這い上がる
性質を有しているが、この斜めに傾斜したカット部17
の存在によって全体として、型17内にて上方に向かっ
て凸状になるようになっている。
At this time, a portion 17a corresponding to the lens portion 15 and a portion 17b corresponding to the base portion 14 in the mold 17.
The step portion 17c between the cut portion 1 and the cut portion 1 is chamfered diagonally.
It is equipped with 7d. Therefore, the epoxy resin generally has the property of creeping up with respect to the inner wall of the mold 17 due to the surface tension.
Due to the presence of, the shape of the mold 17 as a whole is convex upward.

【0014】なお、上記カット部17の傾斜角度を適宜
に選定することにより、上記レンズ部15の凸状の下面
の曲率半径が調整され得ることになる。
The radius of curvature of the convex lower surface of the lens portion 15 can be adjusted by appropriately selecting the inclination angle of the cut portion 17.

【0015】レンズ部15が硬化したところで、図3に
示すように、型17内にて、このレンズ部15の上に、
エポキシ樹脂に白色等の顔料を加えた樹脂材料を注入し
て、ベース部14を樹脂モールド成形する。これによ
り、表面実装型LED10が完成する。
When the lens portion 15 is hardened, as shown in FIG.
A resin material obtained by adding a pigment such as white to an epoxy resin is injected to mold the base portion 14 by resin molding. As a result, the surface mount LED 10 is completed.

【0016】このように構成された表面実装型LED1
0は、ベース部14とレンズ部15の境界面が、下方に
向かって凸状に形成されていると共に、レンズ部14が
透明であり、且つベース部15が顔料によって着色され
ていることから、その境界面が、上方に向かって凹状の
反射鏡16として作用することになる。これにより、ベ
ース部14の底面または側面に露出した二つのリードフ
レーム11,12の下方のリード部を介してLEDチッ
プ13に給電が行なわれると、該LEDチップ13が発
光し、このときLEDチップ13から出射した光は、そ
の一部が直接に上方へ出射すると共に、他の一部がレン
ズ部15の凸状の下面に入射し、該下面により反射され
てレンズ部15から外部へ出射し、その際レンズ部15
の作用によって、ほぼ上方に向かって進行することか
ら、従来の反射面を備えたLEDに比較して、より出射
光量が多くなり、発光効率がより一層高められている。
The surface-mounted LED 1 thus constructed
0 means that the boundary surface between the base portion 14 and the lens portion 15 is formed to be convex downward, the lens portion 14 is transparent, and the base portion 15 is colored with a pigment. The boundary surface acts as a concave reflecting mirror 16 upward. As a result, when power is supplied to the LED chip 13 via the lead portions below the two lead frames 11 and 12 exposed on the bottom surface or the side surface of the base portion 14, the LED chip 13 emits light, and at this time, the LED chip 13 A part of the light emitted from 13 is directly emitted upward, and the other part is incident on the convex lower surface of the lens portion 15, is reflected by the lower surface, and is emitted from the lens portion 15 to the outside. , Then the lens part 15
By the action of, the light travels substantially upward, so that the amount of emitted light is increased and the light emission efficiency is further enhanced, as compared with the conventional LED having a reflecting surface.

【0017】[0017]

【発明の効果】以上述べたように、この発明によれば、
レンズ部の下面を樹脂モールド成形時に、樹脂の表面張
力に基づいて下方に向かって凸状に形成し、その後、こ
の凸状の下面に対して、顔料を含んだ樹脂材料によりベ
ース部を隣接して樹脂モールド成形するので、レンズ部
の下面はこのレンズ部内からの光に対して、比較的大き
な口径の凹面鏡として作用することになる。従って、樹
脂材料の表面張力を利用することにより、簡単な構成に
より、比較的大きな口径の反射面が構成され、低コスト
で、発光効率を向上させることが可能になる。かくし
て、本発明によれば、簡単な構成により低コストで、発
光効率が向上されるようにした、表面実装型LEDの製
造方法が提供される。
As described above, according to the present invention,
At the time of resin molding, the lower surface of the lens portion is formed in a convex shape downward based on the surface tension of the resin, and then the base portion is adjacent to the convex lower surface with a resin material containing a pigment. Since the resin molding is performed by the resin molding, the lower surface of the lens portion acts as a concave mirror having a relatively large diameter with respect to the light from inside the lens portion. Therefore, by utilizing the surface tension of the resin material, the reflecting surface having a relatively large diameter can be configured with a simple configuration, and the luminous efficiency can be improved at low cost. Thus, according to the present invention, there is provided a method for manufacturing a surface-mount LED, which has a simple structure and is low in cost and has improved luminous efficiency.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の製造方法の一実施例にしたがって製
造されるLEDの概略断面図である。
FIG. 1 is a schematic cross-sectional view of an LED manufactured according to an embodiment of a manufacturing method of the present invention.

【図2】図1のLEDのレンズ部成形時を示す概略断面
図である。
FIG. 2 is a schematic cross-sectional view showing a state where a lens portion of the LED of FIG. 1 is molded.

【図3】図1のLEDのベース部成形時を示す概略断面
図である。
FIG. 3 is a schematic cross-sectional view showing when the base portion of the LED of FIG. 1 is molded.

【図4】従来の表面実装型LEDの一例を示す概略断面
図である。
FIG. 4 is a schematic cross-sectional view showing an example of a conventional surface mount LED.

【符号の説明】[Explanation of symbols]

10 表面実装型LED 11 リードフレーム 11a 上端面 12 リードフレーム 12a 上端面 13 LEDチップ 14 ベース部 15 レンズ部 16 反射鏡 17 型 17a レンズ部対応部分 17b ベース部対応部分 17c 段部 17d カット面 10 Surface Mount LED 11 Lead Frame 11a Upper End Surface 12 Lead Frame 12a Upper End Surface 13 LED Chip 14 Base Part 15 Lens Part 16 Reflector 17 Type 17a Lens Part Corresponding Part 17b Base Part Corresponding Part 17c Step Part 17d Cut Surface

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 二本のリードフレームと、該リードフレ
ームの一方の上端面に取り付けられ且つその一面が他方
のリードフレームの上端に対して接続されているLED
チップと、各リードフレームの上端領域を覆うように成
形されたベース部と、該ベース部の上方にて、各リード
フレームの上端面及びLEDチップを包囲するように樹
脂モールドにより形成されたレンズ部とを具備する表面
実装型LEDにおいて、 先ずレンズ部が、逆さまの状態にて型内に流し込んだエ
ポキシ樹脂中に挿入されることにより樹脂モールド成形
され、その際、該エポキシ樹脂の表面張力によって、上
記レンズ部の下面が下方に向かって凸状に形成され、そ
の後ベース部が顔料を含んだ樹脂材料により樹脂モール
ド成形されることを特徴とする、表面実装型LEDの製
造方法。
1. Two lead frames and an LED mounted on one upper end surface of the lead frame and one surface of which is connected to the upper end of the other lead frame.
A chip, a base portion formed to cover the upper end region of each lead frame, and a lens portion formed above the base portion by resin molding so as to surround the upper end surface of each lead frame and the LED chip. In the surface-mounted LED including and, first, the lens portion is resin-molded by being inserted upside down into the epoxy resin poured into the mold, and at that time, due to the surface tension of the epoxy resin, A method for manufacturing a surface-mounted LED, wherein the lower surface of the lens portion is formed to be convex downward, and then the base portion is resin-molded with a resin material containing a pigment.
JP4359886A 1992-12-30 1992-12-30 Manufacture of surface-mount type led Pending JPH06204567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4359886A JPH06204567A (en) 1992-12-30 1992-12-30 Manufacture of surface-mount type led

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4359886A JPH06204567A (en) 1992-12-30 1992-12-30 Manufacture of surface-mount type led

Publications (1)

Publication Number Publication Date
JPH06204567A true JPH06204567A (en) 1994-07-22

Family

ID=18466803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4359886A Pending JPH06204567A (en) 1992-12-30 1992-12-30 Manufacture of surface-mount type led

Country Status (1)

Country Link
JP (1) JPH06204567A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002359403A (en) * 2001-05-31 2002-12-13 Nichia Chem Ind Ltd Light-emitting device
KR20030056070A (en) * 2001-12-27 2003-07-04 주식회사 대한전광 A LED module having a LED lamp for surface-mouting
KR100495103B1 (en) * 2002-02-23 2005-06-14 주식회사 대한전광 A LED lamp for surface-mouting and a manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002359403A (en) * 2001-05-31 2002-12-13 Nichia Chem Ind Ltd Light-emitting device
KR20030056070A (en) * 2001-12-27 2003-07-04 주식회사 대한전광 A LED module having a LED lamp for surface-mouting
KR100495103B1 (en) * 2002-02-23 2005-06-14 주식회사 대한전광 A LED lamp for surface-mouting and a manufacturing method thereof

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