JP2787300B2 - Light emitting diode - Google Patents
Light emitting diodeInfo
- Publication number
- JP2787300B2 JP2787300B2 JP1102163A JP10216389A JP2787300B2 JP 2787300 B2 JP2787300 B2 JP 2787300B2 JP 1102163 A JP1102163 A JP 1102163A JP 10216389 A JP10216389 A JP 10216389A JP 2787300 B2 JP2787300 B2 JP 2787300B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- emitting element
- concave
- emitted
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、高放射エネルギー密度の放射ができる発光
ダイオードに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode capable of emitting a high radiant energy density.
従来より、発光ダイオードの発光素子が発する光を有
効に前面方向に放射するため、種々の構造の発光ダイオ
ードが案出されている。2. Description of the Related Art Conventionally, light-emitting diodes having various structures have been devised in order to effectively emit light emitted from a light-emitting element of a light-emitting diode toward a front surface.
第５図は従来の発光ダイオードの概略断面図であり、
第６図はその発光素子が発する光の光路を示す図であ
る。第５図及び第６図において51は発光素子、52・53は
リードフレーム、54はワイヤ、55は光透過性材料、55a
は凹面状反射面、55bは放射面である。発光素子51は一
方のリードフレーム52上にマウントされ、他方のリード
フレーム53とはワイヤ54によって電気的に接続されてい
る。そして、これらは光透過性材料55により、モールド
されると共に、発光素子51の発光面側には発光面と対向
して凹面状反射面55aが形成され、一方発光素子51の背
面側には発光素子51が発した光を外部に放射する放射面
55bが形成されている。尚、光透過性材料55の下端面は
発光素子51を焦点とする回転放物面状に形成され、この
下端面に金属蒸着又は鍍金処理等を施すことにより凹面
状反射面が形成されている。FIG. 5 is a schematic sectional view of a conventional light emitting diode,
FIG. 6 is a diagram showing an optical path of light emitted from the light emitting element. 5 and 6, reference numeral 51 denotes a light emitting element, 52 and 53 denote lead frames, 54 denotes wires, 55 denotes a light transmitting material, and 55a.
Is a concave reflecting surface, and 55b is a radiation surface. The light emitting element 51 is mounted on one of the lead frames 52, and is electrically connected to the other lead frame 53 by wires 54. These are molded with a light transmitting material 55, and a concave reflecting surface 55a is formed on the light emitting surface side of the light emitting element 51 so as to face the light emitting surface, while the light emitting element 51 has a light emitting surface on the back side. A radiation surface that radiates the light emitted by the element 51 to the outside
55b are formed. Note that the lower end surface of the light transmitting material 55 is formed in a paraboloid of revolution with the light emitting element 51 as a focal point, and a concave reflecting surface is formed on the lower end surface by performing metal deposition or plating. .
上記のように構成された発光ダイオードにおいて、発
光素子51が発する光は第６図の矢印で示すような光路を
たどる。すなわち、発光素子51が発する略全光束は凹面
状反射面55aに放射され、放射された光は凹面状反射面5
5aによって凹面状反射面55aの中心軸に対して平行な光
として反射され、この反射光は放射面55bから外部に放
射される。したがって、発光素子51が発する光を有効に
前面方向に放射することができる。In the light emitting diode configured as described above, light emitted from the light emitting element 51 follows an optical path as shown by an arrow in FIG. That is, substantially all light beams emitted from the light emitting element 51 are radiated to the concave reflecting surface 55a, and the emitted light is transmitted to the concave reflecting surface 5a.
The light is reflected by 5a as light parallel to the central axis of the concave reflecting surface 55a, and the reflected light is radiated from the radiation surface 55b to the outside. Therefore, the light emitted from the light emitting element 51 can be effectively emitted toward the front.
ところで、従来の発光ダイオードでは、放射面55bの
放射面積を小さくしたときには、凹面状反射面55aの形
状も小さくしなければならず、このため発光素子51やリ
ードフレーム52・53の影によって生ずる影響が無視でき
なくなる。このように、従来の発光ダイオードでは、放
射面55bの形状を小さくすると、発光素子51が発する光
の前面方向への放射効率が悪くなるという欠点があっ
た。By the way, in the conventional light emitting diode, when the radiation area of the radiation surface 55b is reduced, the shape of the concave reflection surface 55a must also be reduced, and therefore, the influence caused by the shadows of the light emitting element 51 and the lead frames 52 and 53. Cannot be ignored. As described above, in the conventional light emitting diode, when the shape of the radiation surface 55b is reduced, there is a disadvantage that the radiation efficiency of the light emitted from the light emitting element 51 in the front direction is deteriorated.
また、従来の発光ダイオードでは、凹面状反射面55a
の形状を小さくすると、発光素子51の大きさを無視する
ことができなくなり、発光素子51を点光源とみなすこと
ができなくなる。このため、従来の発光ダイオードで
は、放射面55bの形状を小さくすると、凹面状反射面55a
が発光素子51の発する光を効率よく制御することができ
なくなるという欠点があった。In the conventional light emitting diode, the concave reflecting surface 55a
When the shape of is smaller, the size of the light emitting element 51 cannot be ignored, and the light emitting element 51 cannot be regarded as a point light source. For this reason, in the conventional light emitting diode, when the shape of the radiation surface 55b is reduced, the concave reflection surface 55a
However, there is a disadvantage that the light emitted from the light emitting element 51 cannot be efficiently controlled.
本発明は上記事情に基づいてなされたものであり、放
射面の放射面積を小さくし、しかもその小面積の放射面
から高放射エネルギーの光を効率よく外部に放射するこ
とができる発光ダイオードを提供することを目的とする
ものである。The present invention has been made based on the above circumstances, and provides a light emitting diode that can reduce the radiation area of a radiation surface and efficiently emit light with high radiation energy to the outside from the small radiation surface. It is intended to do so.
上記の目的を達成するための本発明は、発光素子と、
該発光素子に電力を供給するリード部と、前記発光素子
の発光面に対向して設けられ前記発光素子が発した光を
反射し収束する凹面状反射面と、前記発光素子の背面側
に設けられ前記発光素子が発した光を外部に放射する放
射面であって前記凹面状反射面よりも形状の小さい放射
面とよりなり、前記凹面状反射面は楕円面状に形成さ
れ、前記発光素子は該凹面状反射面の略焦点に配置さ
れ、かつ前記放射面は凸レンズ状又は凹レンズ状に形成
され、該放射面の焦点が前記凹面状反射面の他方の焦点
に配置されることにより、前記発光素子が発した光を前
記凹面状反射面で反射し収束した後に、該光を前記放射
面から外部に放射するように構成したことを特徴とする
発光ダイオード。The present invention for achieving the above object, a light-emitting element,
A lead portion for supplying power to the light emitting element, a concave reflecting surface provided to face a light emitting surface of the light emitting element and reflecting and converging light emitted by the light emitting element; and a rear surface side of the light emitting element. A radiation surface for emitting light emitted by the light emitting element to the outside, the radiation surface having a smaller shape than the concave reflection surface, the concave reflection surface is formed in an elliptical shape, and the light emitting element Is arranged at a substantially focal point of the concave reflection surface, and the radiation surface is formed in a convex lens shape or a concave lens shape, and the focal point of the radiation surface is disposed at the other focal point of the concave reflection surface, A light emitting diode, wherein the light emitted from the light emitting element is reflected by the concave reflecting surface and converged, and then the light is emitted from the emitting surface to the outside.
また、前記放射面は凸レンズ状又は凹レンズ状に形成
され、且つ該放射面の焦点が前記凹面状反射面の他方の
焦点に配置されていることが好ましい。Preferably, the radiation surface is formed in a convex lens shape or a concave lens shape, and the focal point of the radiation surface is arranged at the other focal point of the concave reflection surface.
また、前記凹面状反射面と前記反射面との間の中空部
は光透過性材料で埋められていることが好ましい。Preferably, a hollow portion between the concave reflecting surface and the reflecting surface is filled with a light transmitting material.
本発明は前記の構成により、発光素子の発光面側には
発光素子が発した光を反射し収束する凹面状反射面が、
また発光素子の背面側には発光素子が発した光を外部に
放射する放射面積の小さい放射面が形成されているの
で、リード部から発光素子に電力を供給し、発光素子が
発光すると、発光した光は前記凹面状反射面で反射し収
束された後、前記放射面から外部に放射される。このよ
うに、発光素子が発した光を一度凹面状反射面によって
反射し収束した後、外部に放射するので、放射面の形状
が小さくても発光素子やリード部の影による放射効率の
低下を防止することができる。また、放射面の形状は小
さくても、凹面状反射面は発光素子を点光源とみなすこ
とができるように大きく形成することができるので、発
光素子が発した光を放射面積の小さい放射面から効率よ
く外部に放射することができる。According to the present invention, a concave reflection surface that reflects and converges light emitted by the light emitting element is provided on the light emitting surface side of the light emitting element,
A light emitting surface with a small emission area for emitting light emitted from the light emitting element to the outside is formed on the back side of the light emitting element. When power is supplied to the light emitting element from the lead portion and the light emitting element emits light, the light emitting element emits light. The reflected light is reflected by the concave reflecting surface and converged, and then emitted to the outside from the radiation surface. In this way, the light emitted from the light emitting element is once reflected by the concave reflecting surface and converged, and then emitted to the outside.Therefore, even if the shape of the emitting surface is small, the reduction of the radiation efficiency due to the shadow of the light emitting element or the lead portion is prevented. Can be prevented. In addition, although the shape of the emitting surface is small, the concave reflecting surface can be formed large so that the light emitting element can be regarded as a point light source. It can be radiated to the outside efficiently.
また、前記凹面状反射面を楕円面状に形成し、前記発
光素子を該凹面状反射面の略焦点に配置することによ
り、発光素子が発する光を効率よく他方の焦点に収束す
るように反射して外部に放射することができる。Further, by forming the concave reflecting surface in an elliptical shape and arranging the light emitting element at a substantially focal point of the concave reflecting surface, the light emitted from the light emitting element is reflected so as to efficiently converge to the other focal point. And can radiate to the outside.
また、前記放射面を凸レンズ状又は凹レンズ状に形成
し、且つ該放射面の焦点を楕円面状に形成された前記凹
面状反射面の他方の焦点に配置することにより、発光素
子が発した光は前記凹面状反射面によって反射面の焦点
に集光するように反射され、更に反射面によって平行光
として外部に放射される。Further, the emission surface is formed in a convex lens shape or a concave lens shape, and the focal point of the emission surface is arranged at the other focal point of the concave reflection surface formed in an elliptical shape, so that light emitted from the light emitting element is obtained. Is reflected by the concave reflecting surface so as to converge on the focal point of the reflecting surface, and is further radiated outside as parallel light by the reflecting surface.
更に、前記凹面状反射面と前記放射面との間の中空部
を光透過性材料で埋めることにより、発光素子から放射
面までの光路は光透過性材料で埋められ、空気層が介在
しないので、界面反射による光損失の減少を図ると共
に、振動や衝撃から発光素子等を保護することができ
る。Furthermore, by filling the hollow portion between the concave reflecting surface and the radiation surface with a light transmitting material, the light path from the light emitting element to the radiation surface is filled with the light transmitting material, and no air layer is interposed. In addition, light loss due to interface reflection can be reduced, and the light emitting element and the like can be protected from vibration and impact.
以下に本発明の第１の実施例を第１図及び第２図を参
照にして説明する。第１図は本発明の第１の実施例であ
る発光ダイオードの概略断面図、第２図はその発光素子
が発する光の光路を示す図である。第１図及び第２図に
おいて１は発光素子、２・３はリードフレーム、４はワ
イヤ、５は光透過性材料、5aは凹面状反射面、5bは放射
面である。Hereinafter, a first embodiment of the present invention will be described with reference to FIG. 1 and FIG. FIG. 1 is a schematic sectional view of a light emitting diode according to a first embodiment of the present invention, and FIG. 2 is a view showing an optical path of light emitted from the light emitting element. 1 and 2, 1 is a light emitting element, 2 and 3 are lead frames, 4 is a wire, 5 is a light transmitting material, 5a is a concave reflecting surface, and 5b is a radiation surface.
発光素子１は一方のリードフレーム２にマウントさ
れ、ワイヤ４により他方のリードフレーム３と電気的に
接続されている。また、発光素子１とリードフレーム２
・３の先端部とワイヤ４とは硝子やエポキシ樹脂等の光
透過性材料５によりモールドされている。光透過性材料
５の下端面は、発光素子１の発光面と対向し、且つ発光
素子１を焦点とする回転楕円面状に形成され、その下端
面には、鍍金又は金属蒸着等による鏡面加工により、凹
面状反射面5aが形成されている。発光素子１の背面側に
位置する光透過性材料５の上端面は、発光素子が発した
光を外部に放射する放射面5bであり、また放射面5bは回
転楕円状に形成された凹面状反射面5aの中心軸上に、凹
面状反射面5aの他方の焦点をその焦点とする凸レンズ状
に形成されている。尚、凹面状反射面5aを金属鍍金した
場合には、金属鍍金により２本のリードフレーム２・３
間が短絡されるのを防止するために、リードフレーム２
・３には絶縁を施す必要がある。The light emitting element 1 is mounted on one lead frame 2 and is electrically connected to the other lead frame 3 by a wire 4. Also, the light emitting element 1 and the lead frame 2
The tip of 3 and the wire 4 are molded with a light transmitting material 5 such as glass or epoxy resin. The lower end face of the light transmitting material 5 is formed in a spheroidal shape facing the light emitting surface of the light emitting element 1 and having the light emitting element 1 as a focal point, and the lower end face is mirror-finished by plating or metal deposition. Thereby, a concave reflecting surface 5a is formed. The upper end surface of the light transmitting material 5 located on the back side of the light emitting element 1 is a radiation surface 5b for radiating light emitted from the light emitting element to the outside, and the radiation surface 5b is a concave surface formed in a spheroidal shape. On the central axis of the reflecting surface 5a, it is formed in a convex lens shape having the other focal point of the concave reflecting surface 5a as its focal point. When the concave reflecting surface 5a is plated with metal, the two lead frames 2, 3 are plated with metal.
Lead frame 2 to prevent short circuit
・ 3 needs to be insulated.
上記の構成によれば、リードフレーム２・３により発
光素子１に電力が供給され、発光素子１が発光する。発
光素子１が発した光は第２図の矢印で示すような光路を
たどる。すなわち、発光素子１が発した略全ての光は発
光素子１の発光面側に対向して設けられた凹面状反射面
5aにより反射される。ここで、本実施例の凹面状反射面
5aは回転楕円面状に形成され、発光素子は凹面状反射面
5aの一方の焦点に配置されているので、発光素子１が発
した光は凹面状反射面5aで反射され、他方の焦点に集光
する。また、本実施例の放射面5bは凹面状反射面5aの他
方の焦点をその焦点とする凸レンズ状に形成されている
ので、集光された光は凸レンズ状の放射面5bにより、そ
の放射面の中心軸に対して平行な光とされて外部に放射
される。According to the above configuration, power is supplied to the light emitting element 1 by the lead frames 2 and 3, and the light emitting element 1 emits light. The light emitted from the light emitting element 1 follows an optical path as shown by an arrow in FIG. That is, almost all light emitted from the light emitting element 1 is a concave reflection surface provided to face the light emitting surface side of the light emitting element 1.
Reflected by 5a. Here, the concave reflecting surface of the present embodiment
5a is formed in a spheroidal shape, and the light emitting element has a concave reflective surface.
The light emitted from the light emitting element 1 is reflected by the concave reflecting surface 5a and is condensed at the other focal point because it is arranged at one focal point of 5a. Further, since the radiation surface 5b of the present embodiment is formed in a convex lens shape having the other focal point of the concave reflection surface 5a as its focal point, the condensed light is emitted by the convex lens radiation surface 5b. Is emitted as light parallel to the central axis of.
上記の実施例によれば、発光素子１が発した光を凹面
状反射面5aによって反射して略一点に集光した後、放射
面5bによって平行光として外部に放射するので、放射面
5bの面積が小さくても発光素子１やリードフレーム２・
３の影による放射効率の低下を防止することができる。According to the above embodiment, after the light emitted from the light emitting element 1 is reflected by the concave reflecting surface 5a and condensed substantially at one point, the light is emitted to the outside as parallel light by the emitting surface 5b.
Even if the area of 5b is small, the light emitting element 1 and the lead frame 2
It is possible to prevent the radiation efficiency from decreasing due to the shadow of No. 3.
また、上記の実施例によれば、放射面5bの形状は小さ
くても、凹面状反射面5aは発光素子１を点光源とみなす
ことができる程度に大きく形成することができるので、
発光素子１が発した光を効率よく反射・収束して外部に
放射することができる。Further, according to the above embodiment, even if the shape of the radiation surface 5b is small, the concave reflection surface 5a can be formed large enough to allow the light emitting element 1 to be regarded as a point light source.
The light emitted from the light emitting element 1 can be efficiently reflected and converged and emitted to the outside.
更に、上記の実施例によれば、発光素子１が発した略
全光束を放射面5bから有効に放射することができるの
で、放射面積が小さくても高放射エネルギー密度の放射
ができる発光ダイオードを提供することができる。Furthermore, according to the above-described embodiment, since substantially the entire luminous flux emitted by the light emitting element 1 can be effectively emitted from the emission surface 5b, a light emitting diode capable of emitting a high emission energy density even with a small emission area is provided. Can be provided.
加えて、上記の実施例によれば、放射面5bを適当な大
きさに形成することにより、たとえば光ファイバと効率
よく結合することができ、多種多様な用途に適用するこ
とができる。In addition, according to the above-described embodiment, by forming the radiation surface 5b to have an appropriate size, it can be efficiently coupled to, for example, an optical fiber, and can be applied to various uses.
第３図は本発明の第２の実施例である発光ダイオード
の概略断面図であり、第４図はその発光素子が発する光
の光路を示す図である。第３図及び第４図において5cは
凹レンズ状に形成された放射面である。尚、第３図及び
第４図に示す第２の実施例において上記第１図及び第２
図に示す第１の実施例と同一の機能を有するものは、同
一の符号を付することによりその詳細な説明を省略す
る。FIG. 3 is a schematic sectional view of a light emitting diode according to a second embodiment of the present invention, and FIG. 4 is a view showing an optical path of light emitted from the light emitting element. 3 and 4, reference numeral 5c denotes a radiation surface formed in a concave lens shape. Note that, in the second embodiment shown in FIGS.
Components having the same functions as those of the first embodiment shown in the drawings are denoted by the same reference numerals, and detailed description thereof will be omitted.
第２の実施例が前記第１の実施例と異なるのは、第１
の実施例の凸レンズ状の放射面5bを、凹レンズ状の放射
面5cとした点にある。本実施例は上記の構成により、第
４図に示すように、凹面状反射面5aの一方の焦点に配置
された発光素子１が発した光は凹面状反射面5aの他方の
焦点、すなわち凹レンズ状の放射面5cの焦点に収束する
ように凹面状反射面5aによって反射され、更に凹レンズ
状の放射面5cによって前記第１の実施例と同様に中心軸
に平行な平行光とされ外部に放射される。その他の作用
・効果は第１の実施例と同様である。The second embodiment differs from the first embodiment only in the first embodiment.
The point is that the convex lens-shaped radiation surface 5b of the embodiment is replaced by a concave lens-shaped radiation surface 5c. In the present embodiment, as shown in FIG. 4, the light emitted from the light emitting element 1 disposed at one focal point of the concave reflecting surface 5a is transmitted to the other focal point of the concave reflecting surface 5a, that is, the concave lens. The light is reflected by the concave reflecting surface 5a so as to converge to the focal point of the radiating surface 5c, and is further converted into parallel light parallel to the central axis by the concave lens-shaped radiating surface 5c as in the first embodiment. Is done. Other operations and effects are the same as those of the first embodiment.
尚、上記第１及び第２の実施例では、凹面状反射面5a
は回転楕円面状に形成した場合について説明したが、本
発明はこれに限定されるものではなく、発光素子が発す
る光を収束光として反射できるものであれば、たとえば
他の楕円面状のものであってもよい。In the first and second embodiments, the concave reflecting surface 5a is used.
Has been described in the case of forming a spheroidal shape, but the present invention is not limited to this, as long as the light emitted from the light emitting element can be reflected as convergent light, for example, other elliptical shape It may be.
また、上記第１及び第２の実施例では、放射面を凸レ
ンズ状又は凹レンズ状に形成した場合について説明した
が、放射面はこれに限られず、たとえばプリズム状に形
成したものでもよい。これにより、たとえば微小のプリ
ズムを放射面に多数個配置することにより、発光素子１
が発した光を散乱光として外部に放射することができ
る。Further, in the first and second embodiments, the case where the radiation surface is formed in a convex lens shape or a concave lens shape has been described. However, the radiation surface is not limited to this, and may be formed in a prism shape, for example. Thereby, for example, by arranging a large number of minute prisms on the radiation surface, the light emitting element 1
Can be emitted to the outside as scattered light.
更に、上記第１及び第２の実施例では、凹面状反射面
5aと放射面5b・5cとの間の中空部は光透過性材料５で埋
められている場合について説明したが、凹面状反射面5a
と放射面5b・5cとは空気層を介して配置されたものであ
ってもよい。Further, in the first and second embodiments, the concave reflecting surface is used.
Although the case where the hollow portion between 5a and the radiation surfaces 5b and 5c is filled with the light transmitting material 5 has been described, the concave reflection surface 5a
The radiating surfaces 5b and 5c may be arranged via an air layer.
以上説明したように本発明によれば、発光素子の発光
面側に発光素子が発した光を反射し収束する凹面状反射
面を配置し、発光素子の背面側であって反射光の集光点
近傍に、凹面状反射面よりも形状の小さい放射面を配置
することにより、放射面の形状が小さくても、発光素子
が発した光を効率よく放射面から前面方向に放射するこ
とができる発光ダイオードを提供することができる。ま
た、本発明によれば、発光素子が発した略全光束を放射
面積の小さい放射面から外部に放射することができるの
で、光放射エネルギー密度の放射ができる発光ダイオー
ドを提供することができる。As described above, according to the present invention, a concave reflecting surface that reflects and converges light emitted by a light emitting element is disposed on the light emitting surface side of the light emitting element, By arranging a radiation surface having a shape smaller than the concave reflection surface in the vicinity of the point, light emitted by the light emitting element can be efficiently emitted from the radiation surface to the front surface even if the shape of the radiation surface is small. A light emitting diode can be provided. Further, according to the present invention, since substantially the entire luminous flux emitted by the light emitting element can be radiated to the outside from a radiation surface having a small radiation area, it is possible to provide a light emitting diode capable of radiating light radiation energy density.
第１図は本発明は第１の実施例である発光ダイオードの
概略断面図、第２図はその発光素子が発する光の光路
図、第３図は本発明の第２の実施例である発光ダイオー
ドの概略断面図、第４図はその発光素子が発する光の光
路図、第５図は従来の発光ダイオードの概略断面図、第
６図はその発光素子が発する光の光路図である。 １……発光素子、２・３……リードフレーム、 ４……ワイヤ、５……光透過性材料、 5a……凹面状反射面、5b・5c……放射面。FIG. 1 is a schematic sectional view of a light emitting diode according to a first embodiment of the present invention, FIG. 2 is an optical path diagram of light emitted from the light emitting element, and FIG. 3 is light emitting according to a second embodiment of the present invention. FIG. 4 is a schematic sectional view of a diode, FIG. 4 is an optical path diagram of light emitted from the light emitting element, FIG. 5 is a schematic sectional view of a conventional light emitting diode, and FIG. 6 is an optical path diagram of light emitted from the light emitting element. 1 ... Light-emitting element, 2/3 ... Lead frame, 4 ... Wire, 5 ... Light transmissive material, 5a ... Concave reflection surface, 5b / 5c ... Emission surface.
Claims (2)
リード部と、前記発光素子の発光面に対向して設けられ
前記発光素子が発した光を反射し収束する凹面状反射面
と、前記発光素子の背面側に設けられ前記発光素子が発
した光を外部に放射する放射面であって前記凹面状反射
面よりも形状の小さい放射面とよりなり、前記凹面状反
射面は楕円面状に形成され、前記発光素子は該凹面状反
射面の略焦点に配置され、かつ前記放射面は凸レンズ状
又は凹レンズ状に形成され、該放射面の焦点が前記凹面
状反射面の他方の焦点に配置されることにより、前記発
光素子が発する光を前記凹面状反射面で反射し収束した
後に、該光を前記放射面から外部に放射するように構成
したことを特徴とする発光ダイオード。A light-emitting element; a lead portion for supplying power to the light-emitting element; and a concave reflecting surface provided to face a light-emitting surface of the light-emitting element and reflecting and converging light emitted by the light-emitting element. A radiation surface provided on the back side of the light emitting element and radiating light emitted from the light emitting element to the outside, the radiation surface having a shape smaller than that of the concave reflection surface, and the concave reflection surface is elliptical. The light emitting element is formed in a planar shape, the light emitting element is arranged at a substantially focal point of the concave reflecting surface, and the emitting surface is formed in a convex lens shape or a concave lens shape, and the focal point of the emitting surface is the other of the concave reflecting surface. The light emitting diode is characterized in that the light emitted from the light emitting element is reflected by the concave reflection surface and converged after being disposed at the focal point, and then the light is emitted to the outside from the radiation surface.
空部は光透過性材料で埋められている請求項１記載の発
光ダイオード。2. The light emitting diode according to claim 1, wherein a hollow portion between the concave reflecting surface and the radiation surface is filled with a light transmitting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1102163A JP2787300B2 (en) | 1989-04-21 | 1989-04-21 | Light emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1102163A JP2787300B2 (en) | 1989-04-21 | 1989-04-21 | Light emitting diode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02280388A JPH02280388A (en) | 1990-11-16 |
| JP2787300B2 true JP2787300B2 (en) | 1998-08-13 |
Family
ID=14320046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1102163A Expired - Fee Related JP2787300B2 (en) | 1989-04-21 | 1989-04-21 | Light emitting diode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2787300B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311530A1 (en) * | 1992-10-02 | 1994-04-07 | Telefunken Microelectron | Optoelectronic component with a narrow opening angle |
| CN104681548B (en) * | 2015-03-03 | 2017-10-27 | 杭州士兰明芯科技有限公司 | A kind of LED ray structures and preparation method thereof |
| CN104681700B (en) * | 2015-03-03 | 2017-06-16 | 杭州士兰明芯科技有限公司 | LED ray structures and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5882290A (en) * | 1981-11-11 | 1983-05-17 | キムラ電機株式会社 | Reflection type plane dispaly |
| JPH028335Y2 (en) * | 1985-05-07 | 1990-02-28 |
-
1989
- 1989-04-21 JP JP1102163A patent/JP2787300B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02280388A (en) | 1990-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6900587B2 (en) | Light-emitting diode | |
| US6674096B2 (en) | Light-emitting diode (LED) package and packaging method for shaping the external light intensity distribution | |
| US20120243203A1 (en) | Vehicle light | |
| JPH01130578A (en) | Light emitting diode | |
| JP2004088007A (en) | Light emitting diode | |
| JP2787300B2 (en) | Light emitting diode | |
| JPH11260122A (en) | Led array | |
| JPH1187782A (en) | Light emitting diode | |
| JP2830025B2 (en) | Light emitting diode | |
| JP2004087630A (en) | Light emitting diode and led light | |
| JPH0550754U (en) | Light emitting device | |
| JP2707498B2 (en) | Light emitting diode | |
| JPH06350140A (en) | Light emitting diode | |
| JP2629985B2 (en) | Light emitting diode | |
| JPH01143368A (en) | Led display element | |
| JPH01204481A (en) | Led linear light source | |
| JP2729264B2 (en) | Semiconductor light emitting device for optical fiber | |
| JP3600973B2 (en) | Linear light source | |
| JP2003332630A (en) | Light-emitting diode and led light | |
| JP2551176B2 (en) | Light emitting diode lamp | |
| JP2884642B2 (en) | Light emitting diode | |
| JP2782717B2 (en) | Light emitting diode | |
| JPH05243618A (en) | Light-emitting device | |
| JPH09270534A (en) | Linear light source | |
| JP2734614B2 (en) | Light emitting diode and light emitting diode lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |