JPH06177427A - Light emitting diode lamp - Google Patents
Light emitting diode lampInfo
- Publication number
- JPH06177427A JPH06177427A JP43A JP35088392A JPH06177427A JP H06177427 A JPH06177427 A JP H06177427A JP 43 A JP43 A JP 43A JP 35088392 A JP35088392 A JP 35088392A JP H06177427 A JPH06177427 A JP H06177427A
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting diode
- bowl
- lamp
- light emitting
- 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
Links
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 abstract description 6
- 229920000647 polyepoxide Polymers 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、発光ダイオード素子を
封止したドーム状のレンズ部などのランプ本体からリー
ド端子が導出されてなる発光ダイオードランプに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode lamp in which a lead terminal is led out from a lamp body such as a dome-shaped lens portion encapsulating a light emitting diode element.
【０００２】[0002]
【従来の技術】従来の発光ダイオードランプの構成を図
４を参照して説明する。図中、符号１ａ，１ｂはリード
端子であり、一方のリード端子１ａの先端部分に発光ダ
イオード素子２が固着されている。発光ダイオード素子
２は、金属細線３によって他方のリード端子１ｂに接続
されている。発光ダイオード素子２が固着されたリード
端子１ａの先端部分には、パラボラと称される碗状凹部
４が形成されており、発光ダイオード素子２から水平方
向に照射された光を凹部４の壁面で反射して上方に導く
ように構成されている。リード端子１ａ，１ｂの先端部
分は、透光性のエポキシ樹脂などで封止され、この樹脂
がレンズ作用をもったドーム状のランプ本体５を形成し
ている。発光ダイオード素子２から照射された光Ｌ１
は、ランプ本体５のレンズ作用によって集束されて出射
される。2. Description of the Related Art The structure of a conventional light emitting diode lamp will be described with reference to FIG. In the figure, reference numerals 1a and 1b are lead terminals, and the light emitting diode element 2 is fixed to the tip portion of one of the lead terminals 1a. The light emitting diode element 2 is connected to the other lead terminal 1b by a thin metal wire 3. A bowl-shaped recess 4 called a parabola is formed at the tip portion of the lead terminal 1a to which the light-emitting diode element 2 is fixed, and the light radiated horizontally from the light-emitting diode element 2 on the wall surface of the recess 4 is formed. It is configured to reflect and guide upward. The tip portions of the lead terminals 1a and 1b are sealed with a translucent epoxy resin or the like, and this resin forms a dome-shaped lamp body 5 having a lens function. Light L1 emitted from the light emitting diode element 2
Are focused and emitted by the lens action of the lamp body 5.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな構成を有する従来例の場合には、次のような問題が
ある。すなわち、従来の発光ダイオードランプは、碗状
凹部４を設けることにより、発光ダイオード素子２から
水平方向へ照射された光を上方に反射して、ランプの発
光効率をある程度は高めてはいるが、図４に符号Ｌ２で
示すように、ランプ本体５の側面から出射される光も相
当量ある。このようなランプ本体５の側面から出射され
る光Ｌ２は、発光ダイオードランプを前方から見る観察
者には認識されないので、換言すれば、それだけ発光効
率を低下させる要因になっている。However, the conventional example having such a structure has the following problems. That is, in the conventional light emitting diode lamp, although the bowl-shaped recess 4 is provided, the light emitted from the light emitting diode element 2 in the horizontal direction is reflected upward, and the luminous efficiency of the lamp is increased to some extent. As indicated by reference numeral L2 in FIG. 4, there is a considerable amount of light emitted from the side surface of the lamp body 5. The light L2 emitted from the side surface of the lamp body 5 is not recognized by an observer who views the light emitting diode lamp from the front, and in other words, it is a factor that reduces the light emission efficiency.
【０００４】本発明は、このような事情に鑑みてなされ
たものであって、ランプ本体の側面から出射される光を
軽減した、発光効率の高い発光ダイオードランプを提供
することを目的としている。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a light emitting diode lamp having high luminous efficiency in which light emitted from the side surface of the lamp body is reduced.
【０００５】[0005]
【課題を解決するための手段】本発明は、このような目
的を達成するために、次のような構成をとる。すなわ
ち、本発明に係る発光ダイオードランプは、一方のリー
ド端子の先端部にある碗状凹部内に固着された発光ダイ
オード素子と、前記発光ダイオード素子と他方のリード
端子との間を接続する金属細線とを透光性樹脂で封止す
ることにより形成されるランプ本体に、前記碗状凹部を
取り囲み、上方に向けて拡大傾斜した反射面を形成した
ものである。The present invention has the following constitution in order to achieve such an object. That is, the light emitting diode lamp according to the present invention includes a light emitting diode element fixed in a bowl-shaped recess at the tip of one lead terminal, and a thin metal wire connecting between the light emitting diode element and the other lead terminal. In the lamp body formed by sealing and with a translucent resin, a reflecting surface that surrounds the bowl-shaped recess and is enlarged and inclined upward is formed.
【０００６】[0006]
【作用】本発明の作用は次のとおりである。発光ダイオ
ード素子が固着された碗状凹部が、上方に向けて拡大傾
斜した反射面で取り囲まれているので、発光ダイオード
素子から出射された光の内、碗状凹部を外れて横方向に
出射された光は、前記反射面で反射されて上方に導かれ
る。したがって、ランプ本体の側面から出射される光が
少なくなり、ランプの発光効率が高められる。The operation of the present invention is as follows. Since the bowl-shaped recess to which the light-emitting diode element is fixed is surrounded by the reflection surface that is enlarged and inclined upward, out of the light emitted from the light-emitting diode element, the light is emitted laterally outside the bowl-shaped recess. The reflected light is reflected by the reflecting surface and guided upward. Therefore, less light is emitted from the side surface of the lamp body, and the luminous efficiency of the lamp is improved.
【０００７】[0007]
【実施例】以下、図面を参照して本発明の一実施例を説
明する。図１は、本発明に係る発光ダイオードランプの
一実施例の構成を示した縦断面図である。図４に示した
従来の発光ダイオードランプと同様に、２本のリード端
子１ａ，１ｂのうち、一方のリード端子１ａの先端部に
碗状凹部４が形成され、その中に発光ダイオード素子２
が固着されている。発光ダイオード素子２と他方のリー
ド端子１ｂは金属配線３で接続されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing the configuration of an embodiment of a light emitting diode lamp according to the present invention. Similar to the conventional light emitting diode lamp shown in FIG. 4, a bowl-shaped recess 4 is formed at the tip of one of the two lead terminals 1a and 1b, and the light emitting diode element 2 is formed therein.
Is stuck. The light emitting diode element 2 and the other lead terminal 1b are connected by a metal wiring 3.
【０００８】リード端子１ａ，１ｂの先端部分は、透光
性のエポキシ樹脂で封止され、レンズ効果をもったラン
プ本体１０を形成している。このランプ本体１０の胴部
に、碗状凹部４を取り囲み、かつ、上方に向けて拡大傾
斜した反射面１１ａをもった筒状部材１１が装着されて
一体となっている。筒状部材１１は、光の反射効率の良
好な、例えば白色のＰＢＴ（ポリブチレンテレフター
ト）樹脂で形成されている。The tip portions of the lead terminals 1a and 1b are sealed with a translucent epoxy resin to form a lamp body 10 having a lens effect. A tubular member 11 that surrounds the bowl-shaped recess 4 and has a reflecting surface 11a that is enlarged and inclined upward is attached to the body of the lamp body 10 to be integrated. The tubular member 11 is formed of, for example, white PBT (polybutylene terephthalate) resin having good light reflection efficiency.
【０００９】図２は、上述した発光ダイオードランプの
製造方法の一例を示している。まず、図２（ａ）に示す
ように、成形型３０に筒状部材１１を装填し、続いて、
図２（ｂ）に示すように、成形型３０内にエポキシ樹脂
を注入する。そして、図２（ｃ）に示すように、発光ダ
イオード素子２が組み込まれたリードフレーム４０の素
子取り付け部分を成形型３０内に挿入し、エポキシ樹脂
を加熱硬化してランプ本体１０を形成する。FIG. 2 shows an example of a method of manufacturing the above-mentioned light emitting diode lamp. First, as shown in FIG. 2 (a), the molding die 30 is loaded with the tubular member 11, and subsequently,
As shown in FIG. 2B, epoxy resin is injected into the mold 30. Then, as shown in FIG. 2C, the element mounting portion of the lead frame 40 in which the light emitting diode element 2 is incorporated is inserted into the molding die 30, and the epoxy resin is heat-cured to form the lamp body 10.
【００１０】本実施例に係る発光ダイオードランプによ
れば、図１に示すように、発光ダイオード素子２から上
方に向けて照射された光や、あるいは発光ダイオード素
子２から水平方向に照射され、碗状凹部４の立ち上がり
壁面で上方へ向けて反射された光は、ランプ本体１０の
レンズ効果により集束され、光Ｌ１として外部を放出さ
れる。一方、碗状凹部４から外れて発光ダイオード素子
２から横方向に照射された光Ｌ２は、筒状部材１１の反
射面１１ａで反射されて上方に向かい、ランプ本体１０
のレンズ効果により集束されて、外部へ放出される。図
４に示した従来例では、光Ｌ２はランプ本体５の側面か
ら放出される関係で発光効率の低下をきたしていたが、
本実施例ではランプ本体１０の前面から取り出されるの
で、発光効率が高められる。また、ランプ本体１０の表
面での全反射や、エポキシ樹脂に混合される光散乱剤で
反射されて、ランプ本体１０の底部（リード端子側）に
戻ってきた光の一部は、反射面１１ａで反射されて、再
び上方に向けられるので、この点からも発光効率が高め
られる。According to the light emitting diode lamp of the present embodiment, as shown in FIG. 1, the light emitted upward from the light emitting diode element 2 or the light emitted in the horizontal direction from the light emitting diode element 2, The light reflected upward by the rising wall surface of the concave portion 4 is focused by the lens effect of the lamp body 10 and is emitted to the outside as the light L1. On the other hand, the light L2 emitted from the light emitting diode element 2 in the lateral direction outside the bowl-shaped concave portion 4 is reflected by the reflecting surface 11a of the tubular member 11 toward the upper side, and the lamp body 10
It is focused by the lens effect of and is emitted to the outside. In the conventional example shown in FIG. 4, since the light L2 is emitted from the side surface of the lamp body 5, the luminous efficiency is lowered.
In this embodiment, since the light is taken out from the front surface of the lamp body 10, the luminous efficiency is improved. In addition, a part of the light returning to the bottom portion (lead terminal side) of the lamp body 10 after being totally reflected on the surface of the lamp body 10 or reflected by the light scattering agent mixed with the epoxy resin is reflected on the reflecting surface 11a. Since the light is reflected by and is directed upward again, the light emission efficiency is improved also from this point.
【００１１】図３は、本発明の別実施例に係る発光ダイ
オードランプの構成を示した断面図である。本実施例の
特徴は、図１に示した実施例のような筒状部材１１を用
いることなく、ランプ本体２０に反射面２０ａを形成し
たことにある。すなわち、反射面２０ａは、発光ダイオ
ード素子２からの光Ｌ２の入射角度θが臨界角になるよ
うに、ランプ本体２０自身の胴部を成形したもので、特
別の部材を用いて反射面を形成してはいない。本実施例
によっても、反射面２０ａに対して、臨界角内で入射し
た光は、反射面２０ａで全反射して上方に向けられるの
で、発光ダイオードランプの発光効率を高めることがで
きる。FIG. 3 is a sectional view showing the structure of a light emitting diode lamp according to another embodiment of the present invention. The feature of this embodiment is that the reflecting surface 20a is formed on the lamp body 20 without using the tubular member 11 as in the embodiment shown in FIG. That is, the reflecting surface 20a is formed by molding the body of the lamp body 20 itself so that the incident angle θ of the light L2 from the light emitting diode element 2 becomes a critical angle, and the reflecting surface is formed using a special member. I haven't. Also in this embodiment, the light incident on the reflecting surface 20a within the critical angle is totally reflected by the reflecting surface 20a and directed upward, so that the luminous efficiency of the light emitting diode lamp can be improved.
【００１２】なお、上述の各実施例では、ドーム状のラ
ンプ本体をもった発光ダイオードランプを例に採って説
明したが、本発明はこれに限らず、例えば、角形、円柱
状など、種々の形態のランプ本体（モールド部）をもっ
た発光ダイオードランプにも適用することができる。In each of the above-mentioned embodiments, the light-emitting diode lamp having the dome-shaped lamp body has been described as an example. However, the present invention is not limited to this, and various shapes such as a prismatic shape and a cylindrical shape can be used. It can also be applied to a light emitting diode lamp having a shaped lamp body (molded portion).
【００１３】[0013]
【発明の効果】以上の説明から明らかなように、本発明
によれば、発光ダイオード素子が固着された碗状凹部の
周囲に反射面を形成しているので、発光ダイオード素子
から出射された光の内、碗状凹部を外れて横方向に出射
された光は、この反射面で反射されて上方に導かれる。
したがって、ランプ本体の側面から出射される光が少な
くなり、ランプの発光効率が高められる。As is clear from the above description, according to the present invention, since the reflecting surface is formed around the bowl-shaped recess to which the light emitting diode element is fixed, the light emitted from the light emitting diode element is formed. Of these, the light that has left the bowl-shaped recess and is emitted in the lateral direction is reflected by this reflecting surface and guided upward.
Therefore, less light is emitted from the side surface of the lamp body, and the luminous efficiency of the lamp is improved.
【図１】本発明に係る発光ダイオードランプの一実施例
の縦断面図である。FIG. 1 is a vertical sectional view of an embodiment of a light emitting diode lamp according to the present invention.
【図２】実施例に係る発光ダイオードランプの製造方法
の説明図である。FIG. 2 is an explanatory view of the method for manufacturing the light emitting diode lamp according to the embodiment.
【図３】別実施例の縦断面図である。FIG. 3 is a vertical cross-sectional view of another embodiment.
【図４】従来の発光ダイオードランプの縦断面図であ
る。FIG. 4 is a vertical cross-sectional view of a conventional light emitting diode lamp.
１ａ，１ｂ…リード端子 ２…発光ダイオード素子 ３…金属細線 ４…碗状凹部 １０…ランプ本体 １１…筒状部材 １１ａ…反射面 ２０…ランプ本体 ２０ａ…反射面 θ…臨界角 1a, 1b ... Lead terminal 2 ... Light emitting diode element 3 ... Metal thin wire 4 ... Bowl-shaped recess 10 ... Lamp body 11 ... Cylindrical member 11a ... Reflecting surface 20 ... Lamp body 20a ... Reflecting surface θ ... Critical angle
Claims (1)
部内に固着された発光ダイオード素子と、前記発光ダイ
オード素子と他方のリード端子との間を接続する金属細
線とを透光性樹脂で封止することにより形成されるラン
プ本体に、前記碗状凹部を取り囲み、上方に向けて拡大
傾斜した反射面を形成したことを特徴とする発光ダイオ
ードランプ。1. A light-transmitting resin comprising a light-emitting diode element fixed in a bowl-shaped recess at the tip of one lead terminal and a thin metal wire connecting the light-emitting diode element and the other lead terminal. A light-emitting diode lamp, comprising a lamp body formed by encapsulating with a bowl, surrounding the bowl-shaped recess and forming a reflecting surface that is enlarged and inclined upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06177427A (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06177427A (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06177427A true JPH06177427A (en) | 1994-06-24 |
Family
ID=18413545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP43A Pending JPH06177427A (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06177427A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001041222A1 (en) * | 1999-11-30 | 2001-06-07 | Omron Corporation | Optical device and apparatus comprising the optical device |
| KR20020045694A (en) * | 2000-12-09 | 2002-06-20 | 이택렬 | An Optical semiconductive device and the manufacturing method thereof |
| KR20020080834A (en) * | 2001-04-18 | 2002-10-26 | (주)옵토니카 | L.E.D. light projecting apparatus and method of fabricating the same |
| US7244924B2 (en) | 2000-07-14 | 2007-07-17 | Omron Corporation | Transparent optical component for light emitting/receiving elements |
| US8858004B2 (en) | 2005-12-22 | 2014-10-14 | Cree, Inc. | Lighting device |
| US8901585B2 (en) | 2003-05-01 | 2014-12-02 | Cree, Inc. | Multiple component solid state white light |
| US9142734B2 (en) | 2003-02-26 | 2015-09-22 | Cree, Inc. | Composite white light source and method for fabricating |
| US9431589B2 (en) | 2007-12-14 | 2016-08-30 | Cree, Inc. | Textured encapsulant surface in LED packages |
| US9666772B2 (en) | 2003-04-30 | 2017-05-30 | Cree, Inc. | High powered light emitter packages with compact optics |
| CN110050172A (en) * | 2016-12-16 | 2019-07-23 | 罗伯特·博世有限公司 | For manufacturing the method and laser leveling device of the laser module of laser leveling device |
| US10615324B2 (en) | 2013-06-14 | 2020-04-07 | Cree Huizhou Solid State Lighting Company Limited | Tiny 6 pin side view surface mount LED |
-
1992
- 1992-12-03 JP JP43A patent/JPH06177427A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2374461A (en) * | 1999-11-30 | 2002-10-16 | Omron Tateisi Electronics Co | Optical device and apparatus comprising the optical device |
| WO2001041222A1 (en) * | 1999-11-30 | 2001-06-07 | Omron Corporation | Optical device and apparatus comprising the optical device |
| GB2374461B (en) * | 1999-11-30 | 2004-10-27 | Omron Tateisi Electronics Co | Optical device and apparatus comprising the optical device |
| CN1311566C (en) * | 1999-11-30 | 2007-04-18 | 欧姆龙株式会社 | Optical device and apparatus comprising said optical device |
| US7244924B2 (en) | 2000-07-14 | 2007-07-17 | Omron Corporation | Transparent optical component for light emitting/receiving elements |
| KR20020045694A (en) * | 2000-12-09 | 2002-06-20 | 이택렬 | An Optical semiconductive device and the manufacturing method thereof |
| KR20020080834A (en) * | 2001-04-18 | 2002-10-26 | (주)옵토니카 | L.E.D. light projecting apparatus and method of fabricating the same |
| US9142734B2 (en) | 2003-02-26 | 2015-09-22 | Cree, Inc. | Composite white light source and method for fabricating |
| US9666772B2 (en) | 2003-04-30 | 2017-05-30 | Cree, Inc. | High powered light emitter packages with compact optics |
| US8901585B2 (en) | 2003-05-01 | 2014-12-02 | Cree, Inc. | Multiple component solid state white light |
| US8858004B2 (en) | 2005-12-22 | 2014-10-14 | Cree, Inc. | Lighting device |
| US9431589B2 (en) | 2007-12-14 | 2016-08-30 | Cree, Inc. | Textured encapsulant surface in LED packages |
| US10615324B2 (en) | 2013-06-14 | 2020-04-07 | Cree Huizhou Solid State Lighting Company Limited | Tiny 6 pin side view surface mount LED |
| CN110050172A (en) * | 2016-12-16 | 2019-07-23 | 罗伯特·博世有限公司 | For manufacturing the method and laser leveling device of the laser module of laser leveling device |
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