JPH11154766A - Light emitting diode, and signaling - Google Patents

Light emitting diode, and signaling

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Publication number
JPH11154766A
JPH11154766A JP26702798A JP26702798A JPH11154766A JP H11154766 A JPH11154766 A JP H11154766A JP 26702798 A JP26702798 A JP 26702798A JP 26702798 A JP26702798 A JP 26702798A JP H11154766 A JPH11154766 A JP H11154766A
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Prior art keywords
curvature
radius
light
light emitting
tip
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JP26702798A
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JP2980121B2 (en
Inventor
Motokazu Yamada
元量 山田
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Nichia Chem Ind Ltd
日亜化学工業株式会社
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Priority to JP9-257382 priority Critical
Priority to JP25738297 priority
Application filed by Nichia Chem Ind Ltd, 日亜化学工業株式会社 filed Critical Nichia Chem Ind Ltd
Priority to JP26702798A priority patent/JP2980121B2/en
Publication of JPH11154766A publication Critical patent/JPH11154766A/en
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Publication of JP2980121B2 publication Critical patent/JP2980121B2/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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Abstract

PROBLEM TO BE SOLVED: To make it possible to reduce light at a given angle from a light emission observing side without a bad influence and increase the luminance of light at a different angel, as an optical signal with respect to a light emitting element sealed with a transparent lens-shaped molding member. SOLUTION: A light emitting diode includes at least two lead terminals 103 and 104, a light emitting element connected electrically, and a transparent molding member 101 molding the light emitting element. The transparent molding member 101 has a top 201 as a projected optical lens. In this case, first to fourth radii of curvature including an optical axis crossing the tip 201 of the transparent molding member 101 having a relation such that the first radius of curvature from the tip 201 to an end 202 is larger than the third radius of curvature from the tip 201 to an end 204, the fourth radius of curvature from the tip 201 to an end 205 is equal to or larger than the second radius of curvature from the tip 201 to an end 203.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、発光素子を透光性のレンズ状モールド部材にて封止した発光ダイオードに係わり、特に、信号用など発光観測面側から見て一方の光を抑制しその抑制の影響を少なくしつつ他方の光を高輝度に放射させることができる発光ダイオードに関する。 The present invention relates to relates to a light-emitting diode sealed with the lens-shaped mold member of light-permeable light-emitting element, in particular, to suppress one of the light as seen from the light emission observing surface side, such as signal while reducing the influence of the suppression to a light emitting diode capable of emitting the other light with high luminance.

【0002】 [0002]

【従来技術】今日、赤色、黄色、青色及び青緑色が10 [Prior art] today, red, yellow, blue and blue-green 10
00mcd以上にも及ぶ超高輝度に発光可能な発光ダイオードが開発された。 Capable of emitting light emitting diode ultrahigh brightness also extends over 00mcd have been developed. 発光ダイオードは、半導体発光素子であるため振動等に強く長期間安定して発光することができる。 Light emitting diode can be long-term stably emitting strongly vibrations for a semiconductor light-emitting device. また、消費電力が低いという長所もある。 There are also advantages power consumption is low. さらに、発光ダイオードは、半導体素子から単色性ピーク波長が発光される。 Furthermore, light emitting diodes, monochromatic peak wavelength is emitted from the semiconductor element. そのため、白色灯のように各発光色のみを表現させるため、カラーフィルターを利用する必要がない。 Therefore, in order to express only the luminescent color as the white light, it is not necessary to use a color filter. さらにまた、等方的に放出される光を有効利用するため大型な反射ミラーを使用する必要がない。 Furthermore, it is not necessary to use a large reflecting mirror to effectively utilize the light that is isotropically emitted. したがって、発光ダイオードを信号機に利用した場合、外来光が信号機内部に入射し白色灯の後部に設けられた大型な反射ミラーで反射してカラー・フィルターを介して信号機外に放出される疑似点灯現象を生ずることがない。 Therefore, when using a light emitting diode traffic signal, a pseudo lighting phenomenon that external light is incident on the internal traffic is reflected in a large reflecting mirror provided on a rear portion of the white light is emitted to the signal outside through a color filter never produce. したがって、信号機に利用される理想的な光源として発光ダイオードを利用されつつある。 Therefore, it is being utilized light emitting diodes as an ideal light source to be used in traffic lights.

【0003】発光ダイオードをより信号用等に効率よく利用されるためには、反射ミラーをもった信号用光源などとは異なり1個ずつの発光ダイオードが所望の指向特性をもつことが望ましい。 [0003] In order to efficiently utilize the light emitting diodes more signal or the like, light emitting diodes, such as the one by one unlike signal light source having a reflecting mirror it is desirable to have a desired directional characteristic. 信号機用などに利用される発光ダイオードの配向特性としては、正面高度が高く上方向へ発光する必要がない。 As the alignment characteristics of the light emitting diodes to be used for example, for traffic lights, there is no need for emitting the high upward front altitude. 他方、左右方向及び斜め下方向においては、場所により視認する必要がある場合がある。 On the other hand, in the left-right direction and obliquely downward, it may be necessary to visually confirm the location. そのため、各発光ダイオードがそれぞれ上記配向特性を持つ必要がある。 Therefore, the light emitting diodes must have the orientation characteristics.

【0004】一方、ディスプレイ等に用いられる発光ダイオードにも信号用発光ダイオードに近い発光特性が求められる場合がある。 [0004] On the other hand, when the light emission characteristics are required near the light emitting diode to the signal-emitting diode it is also used for display or the like. 特定方向の光を強めた発光ダイオード例として、特開平5−121785号、特開平5− As the light emitting diodes example intensified light in a specific direction, JP-A-5-121785, JP-5-
275752号や特開平8−162673号などが挙げられる。 Such as 275,752 and JP-8-162673 and the like.

【0005】特開平5−275752号には、図7 [0005] JP-5-275752, Fig. 7
(A)、(B)、(C)に示す如く、少なくとも2本のリード端子(703)(704)と、一方のリード端子(703)の先端にダイボンディングされると共に他方のリード端子(7 (A), (B), as (C), the at least two lead terminals (703) (704), the other lead terminal (7 while being die-bonded to the tip of one lead terminal (703)
04)をワイヤー(705)でボンディングされた発光素子(70 04) was the bonding wire (705) light emitting elements (70
2)と、両リード端子(703)(704)の先端の部分をパッケージする合成樹脂製のレンズ付きモールド部材とから成る発光ダイオードが開示されている。 And 2), the light emitting diode is disclosed consisting of a lens with the mold member portion and made packages synthetic resin which the tip of the two lead terminals (703) (704). 特に、発光ダイオードのモールド部における外周面の一部に、モールド部における軸線と平行な平面(711)をモールド部におけるレンズ(701)まで延びるように形成した発光ダイオードとしてある。 In particular, a portion of the outer peripheral surface of the mold portion of the light emitting diodes, there an axis parallel to the plane (711) as a light emitting diode which is formed to extend to the lens (701) in the mold portion of the mold portion.

【0006】このようなレンズ形状とすることにより、 [0006] With such a lens shape,
発光素子から出射される光のうちモールド部の外周面に設けた平面(711)に向かって出射される光は、平面(711) Light emitted toward the plane (711) provided on the outer peripheral surface of the mold portion of the light emitted from the light emitting element, the plane (711)
によって反射する。 It is reflected by the. 反射した光は、平面(711)と反対の方向から出射される。 The reflected light is emitted from a direction opposite to the plane (711). 平面(711)と反対の方向から出射される出射光量分だけ人の目に届く光量をupすることができる。 The amount of light reaching the human eye only irradiating intensity component emitted from the opposite direction to the plane (711) can be Stay up-. したがって、発光ダイオードとしてはそれだけ光量の小さいものを使用でき、消費電力を節減できることが開示されている。 Therefore, it is possible to use a much smaller amount of light as a light emitting diode, it is disclosed that can save power consumption.

【0007】 [0007]

【発明が解決しようとする課題】しかし、このように形成された発光ダイオードは信号用の上記特性を満たすことができないばかりでなく、必ずしも上述の効果を奏しない場合がある。 [SUMMARY OF THE INVENTION] However, the thus formed light-emitting diode is not only unable to satisfy the above characteristics of the signal, always may not bring out the effects described above. 発光素子であるLEDチップから放出された光はモールド部材の形状に沿って集光されるが、 While light emitted from the LED chip is a light emitting element is condensed along the shape of the mold member,
砲弾型のモールド部材の一面を平面(711)状に形成させると、発光素子(702)から発光された光が全反射する。 When one surface of the bullet-shaped mold member is formed on the plane (711) form, light emitted from the light-emitting element (702) is totally reflected.
全反射された光のうち、レンズ正面の曲率にあわせた設計としてもレンズ正面において全反射される場合がある。 Of the total reflected light, which may be totally reflected at the lens front as designed to suit the curvature of the lens front. そのため平面方向に向かって放出された発光素子(7 Therefore released the plane direction the light-emitting element (7
02)からの光がモールド部材の正面から放出され難くレンズ(701)曲面に沿ってモールド部材内で反射を繰り返し裏面側(すなわち、非発光観測面)から放出される場合がある。 02) hardly light is emitted from the front of the mold member from the lens (701) back surface side repeatedly reflected in the mold member along the curved surface (i.e., may be released from the non-light emission observing surface). モールド部材としてエポキシ樹脂を用い空気中に発光素子からの光を放出される場合、屈折率の違いから全反射した光も臨界角以下になり外部に放出されない。 When emitting light from the light emitting element into the air using an epoxy resin as a mold member, the light totally reflected from the difference in refractive index is not released to the outside becomes below the critical angle.

【0008】このようなモールド部材を利用して、平面 [0008] Using such a mold member, the plane
(711)で全反射された発光素子からの光を発光観測面側に放出させようとすると砲弾形状が強くならざるを得ない。 (711) in shell-shaped Attempting to emit light emission observing surface side of the totally reflected light-emitting element is inevitably increased. そのため集光力が強く信号用など左右や下方向にある程度幅(左右方向の半値幅約15゜〜20°、下方向の半値幅約15゜〜20°、上方向の半値幅は、0゜でもよい。)の広い光を得ることができないという問題を有する。 Therefore current half-width of about 15 ° to 20 ° of the optical power is strong signal for such lateral and downward direction to a certain degree the width (left-right direction, the half-width of about 15 ° to 20 ° downward, the half-value width in the upward direction is 0 ° But a problem that it is impossible to obtain a wide optical good.). また、発光素子によっては、必ずしもレンズ設計通りに発光しないという問題を有する。 Further, the light-emitting element, having a necessarily a problem that does not emit light in as lens design. したがって、 Therefore,
本出願人は上記問題点を解決し信号用の利用などに適した所望通りの発光特性を効率よく発光可能な発光ダイオードを提供することにある。 The applicant is to provide a high efficiency capable of emitting light-emitting diode light emission characteristics as desired which is suitable for such use for signal to solve the above problems.

【0009】 [0009]

【課題を解決するための手段】本発明は、少なくとも2 Means for Solving the Problems The present invention, at least 2
つのリード端子(103)(104)と電気的に接続された発光素子(102)と、該発光素子(102)を封止し先端(201)が凸状の光学レンズとなる透光性モールド部材(101)とを有する発光ダイオードである。 One of the lead terminals (103) (104) electrically connected to the luminescent element (102), translucent mold member sealed tip the light-emitting element (102) (201) is convex optical lens (101) and a light emitting diode having a. 特に、先端(201)を通る光軸を含む透光性モールド部材(101)の断面を構成する先端 In particular, the tip constituting the cross section of the translucent mold member (101) including an optical axis passing through the tip (201)
(201)から端部(202)までの第1の曲率半径及び先端(20 From (201) to the end (202) the first radius of curvature and the tip (20
1)から他方の端部(203)までの第2の曲率半径と、光軸を含む断面と垂直をなす断面を構成する先端(201)から端部(204)までの第3の曲率半径及び先端(201)から他方の端部(205)までの第4の曲率半径が、第1の曲率半径の大きさ<第3の曲率半径の大きさ及び第4の曲率半径の大きさ≦第2の曲率半径の大きさの関係を満たす発光ダイオードである。 The other end portion 1) (203) and the second radius of curvature up to the ends from the tip (201) which constitutes a section forming a section perpendicular containing the optical axis (204) to the third radius of curvature and of the tip the other end from the (201) (205) to the fourth radius of curvature, the size of the first radius of curvature <the third radius of curvature of the size and the fourth radius of curvature magnitude ≦ second a light emitting diode that meets the radius of curvature of the magnitude of the relationship.

【0010】これにより、不要な上方の光量を低減させる一方左右方向及び下方向において広視野角に発光可能な高輝度発光ダイオードとすることができる。 [0010] Thus, it is possible to light emission can be high-brightness light-emitting diode in wide viewing angle in one lateral direction and the downward direction to reduce the unnecessary upper amount. 特に、曲率半径の小さい第1の曲率半径(上)方向からの外来光の入射を防止しコントラストを向上させることができる。 In particular, it is possible to prevent incidence of external light from a small radius of curvature first radius of curvature (top) to improve contrast. また、曲率半径の大きい第3、第4の曲率半径(左右)や第2の曲率半径(下)方向から視野角の広い発光特性とすることができる。 Further, it is possible to the radius of curvature of the large third, fourth radius of curvature (left) and second radius of curvature (downward) and the broad emission characteristic viewing angle.

【0011】即ち、発光素子から曲率半径の小さい方向へ向かった光は、視野角が狭く且つ軸上光度を向上させることができる。 [0011] That is, the light directed from the light emitting element to a small radius of curvature direction may be viewing angle is narrow and improve the on-axis luminous intensity. また、発光素子から曲率半径の大きい方向へ向かった光は、より視野角の広い発光特性とすることができる。 The light directed from the light emitting element to the large direction of the radius of curvature may be a broad emission characteristics more viewing angle.

【0012】本発明の請求項2に記載の発光ダイオードは、第3の曲率半径の大きさと第4の曲率半径の大きさが略等しい発光ダイオードである。 [0012] The light emitting diode according to claim 2 of the present invention, the size and magnitude of the fourth radius of curvature of the third radius of curvature is substantially equal to the light emitting diode. これにより左右方向にも均一に指向特性が広く、且つ等しい発光ダイオードとすることができる本発明の請求項3に記載の発光ダイオードは、光軸上の発光観測面側から見て第3及び第4 Thus wide uniform directional characteristics in the horizontal direction, the light emitting diode of claim 3 of the present invention, which may be and equal light-emitting diode, the third and when viewed from the light emission observation surface side of the optical axis 4
の曲率半径を構成する断面と、リード端子間(103)、(10 A cross-section constituting a radius of curvature between the lead terminals (103), (10
4)の配置方向とが略平行である。 The arrangement direction of 4) is substantially parallel. これにより、モールド部材のクラックなどが極めて少なく信頼性の高い発光ダイオードとすることができる。 This makes it possible to cracks of the mold member is very small highly reliable light-emitting diode.

【0013】本発明の請求項4に記載の発光ダイオードは、リード端子(103)が発光素子(102)からの光を反射するカップ(410)を有すると共にカップ(401)内に光軸上の発光観測面側から見て、透光性モールド部材(101)の第2の曲率半径、第3の曲率半径及び第4の曲率半径側よりも第1の曲率半径側の発光出力が高い配置とさせた発光素子(102)を有するものである。 [0013] The light emitting diode according to claim 4 of the present invention, on the optical axis in the cup (401) with the lead terminal (103) has a cup (410) for reflecting light from the light emitting element (102) when viewed from the light emission observation surface side, a second radius of curvature, the light emission output of the third radius of curvature and the fourth first curvature radius side than the radius of curvature side of a high placement of the translucent mold member (101) and has a light emitting element (102) that is. これにより、発光素子からの光をより有効に利用し所望通りの発光特性を得ることができる。 Thus, it is possible to utilize the light from the light emitting element more effectively obtain the light emission characteristics as desired.

【0014】本発明の請求項5に記載の信号機は、少なくとも2つのリード端子と電気的に接続された発光素子と、該発光素子を封止し先端が凸状の光学レンズとなる透光性モールド部材とを有する発光ダイオードを複数配置させてある。 [0014] signals machine according to claim 5 of the present invention includes at least two lead terminals electrically connected to the light emitting element, light-transmitting tip sealing the light-emitting element is a convex optical lens a light emitting diode and a mold member are allowed to more arranged. 特に、発光ダイオードは先端を通る光軸を含む透光性モールド部材の断面を構成する先端から端部までの第1の曲率半径及び先端から他方の端部までの第2の曲率半径と、光軸を含む前記断面と垂直をなす断面を構成する先端から端部までの第3の曲率半径及び先端から他方の端部までの第4の曲率半径がそれぞれ第1 In particular, light emitting diode and a second radius of curvature from the first radius of curvature and the tip of the tip constituting the cross section of the translucent mold member including an optical axis passing through the tip to the end portion to the other end, light the said cross-section and the fourth radius of curvature from the distal end constituting a cross-section perpendicular from the third radius of curvature and the tip to the end to the other end portion including the axis, each 1
の曲率半径の大きさ<第3の曲率半径の大きさ、第4の曲率半径の大きさ≦第2の曲率半径の大きさの関係を満たすと共に各発光ダイオードを同一方向に配置してある。 The radius of curvature of size <Third curvature radius of the size of the respective light emitting diodes fulfills fourth radius of curvature of the magnitude ≦ second radius of curvature of the magnitude of the relationship are arranged in the same direction. これにより、不要な上方の光量を低減させる一方左右方向及び下方向において広視野角に発光可能な高輝度信号機とすることができる。 This makes it possible to light emission can be high intensity traffic wide viewing angle in one lateral direction and the downward direction to reduce the unnecessary upper amount.

【0015】 [0015]

【発明の実施の形態】本発明者は種々の実験の結果、モールド部材を特定形状とさせることにより、一方の指向角を抑制させ中心高度を向上させつつその他の指向角を制御できることを見いだし本発明を成すに到った。 DETAILED DESCRIPTION OF THE INVENTION The present inventors as a result of various experiments, by the mold member with a specific shape, the found that can control the other directional angle while improving the high center by suppressing one of the directional angle It came to form the invention.

【0016】即ち、モールド部材の形状を上方向、左右方向や下方向など少なくとも2種類以上の異なる曲率半径を持つことにより、それぞれ独立した発光特性を示すことができる。 [0016] That is, the upward direction the shape of the mold member, by having at least two or more different radii of curvature, such as the left-right direction and the downward direction, it is possible to indicate an independent light emitting properties. 曲率半径の小さい端面方向からの光を正面輝度向上に利用しつつ、曲率半径の大きい端面方向から半値幅の広い発光を得ることができるものである。 While using light from a small radius of curvature end face direction in the front brightness enhancement, in which the larger end face direction of the curvature radius can be obtained broad emission half width. 特に、信号用発光ダイオードのモールド部材としては、光軸から透光性モールド部材の上方となる第1の曲率半径、左右方向となる第3の曲率半径、第4の曲率半径及び下方となる第2の曲率半径が少なくとも第1の曲率< In particular, the mold members of the signal light-emitting diode, a and an optical axis first radius of curvature as the upper translucent mold member, and the third radius of curvature, a fourth radius of curvature and the lower which is a lateral direction 2 radius of curvature of at least a first curvature <
第3の曲率=第4の曲率及び第2の曲率の関係とすることにより、上方への光を正面発光に寄与させつつ、左右方向や下方の視野角を広くさせることができる。 By the third curvature = fourth curvature and the second curvature relationship, while the contribution of light upward to the front light emitting, it is possible to widen the viewing angle in the horizontal direction and downward.

【0017】以下、本発明の一例を図5に示す。 [0017] Hereinafter, an example of the present invention shown in FIG. 図5 Figure 5
には、GaP基板上に発光層としてAlGaInP層を有する赤色が発光可能なLEDチップを発光素子(502) The red light-emitting element capable of emitting LED chip having an AlGaInP layer as a light emitting layer on the GaP substrate (502)
として利用した。 It was used as a. LEDチップは、半導体接合を挟んで一対の電極が形成されており、等方的な発光が可能な発光素子(502)を構成している。 LED chip, a pair of electrodes formed to sandwich the semiconductor junction constitute an isotropic light emission capable emitting element (502). 次に、マウント・リード Then, the mount lead
(503)上にLEDチップをAgペーストを用いてダイボンディングさせる。 (503) the LED chip is die-bonded using an Ag paste thereon. 他方、インナー・リード(504)と金線(505)を用いてワイヤーボンディングさせそれぞれ電気的に接続させた。 On the other hand, respectively to the wire bonding is electrically connected with the inner lead (504) and gold wire (505). マウント・リード(503)上に配置されたLEDチップ(502)をエポキシ樹脂のインサート成形により被覆してモールド部材(501)を形成させた。 LED chips arranged on the mount lead (503) to (502) to form a molded member covered by insert molding of the epoxy resin (501).

【0018】形成された発光ダイオードは、先端を通る光軸を含む透光性モールド部材(501)の断面を構成する先端から端部までの第1の曲率半径及び第1の曲率半径と対称な先端から他方の端部までの第2の曲率半径と、 The formed light-emitting diode, a first radius of curvature and the first radius of curvature and symmetry of the tip constituting the translucent section of the mold member (501) including an optical axis passing through the tip to the end a second radius of curvature to the other end from the tip,
光軸を含む前記断面と垂直をなす断面を構成する先端から端部までの第3の曲率半径及び第3の曲率半径と対称な先端から他方の端部までの第4の曲率半径が、それぞれ第1の曲率半径の大きさ<第3の曲率半径の大きさ= The fourth radius of curvature from the cross-section and a third radius of curvature and the third radius of curvature and symmetrical tip from the tip constituting a cross-section perpendicular to the end including the optical axis to the other end, respectively the first radius of curvature of magnitude <third curvature radius size =
第4の曲率半径の大きさ≦第2の曲率半径の大きさとさせてある。 It is taken as the size of the fourth radius of curvature of the magnitude ≦ second radius of curvature. また、リード端子間(503)、(504)方向とモールド部材(501)の第1及び第2の曲率半径を構成する断面とを略平行に配置させてある。 Also, between the lead terminals (503), it is allowed disposed substantially parallel to the cross-section constituting the first and second radii of curvature (504) direction and the mold member (501). 第1、第3及び第4の曲率半径側から効率よく光が取り出せるようにLEDチップ(502)とインナー・リード(504)とを接続させる導電性ワイヤー(505)を第2の曲率半径側に配置させてある。 First, the third and 4 LED chips (502) and the inner leads (504) to a conductive wire for connecting the (505) and the second radius of curvature side as the radius of curvature side can be extracted efficiently light It is is arranged.

【0019】これにより第1の曲率半径側(上方向)の発光が少なく、且つ第3、第4及び第2の曲率半径側(左右及び下方向)の視野角が大きく正面、左右、下方向の輝度が高い信号用に好適な発光ダイオードとすることができる。 [0019] Thus less emission of the first radius of curvature side (upward), and the third, fourth and second viewing angle is large front radius of curvature side (left, right, and down), right, down it can be the luminance and suitable light-emitting diodes for a high signal. 以下、本発明の構成について詳述する。 Hereinafter, detailed configuration of the present invention.

【0020】(モールド部材101、501)モールド部材(101)(501)は、発光素子(102)(502)、リード端子(1 [0020] (mold member 101 and 501) mold member (101) (501), the light emitting element (102) (502), the lead terminals (1
03)(104)(503)(504)の一部や電気的接続部材(105)(505) 03) (104) (503) (504) of the part and electrical connection members (105) (505)
となるワイヤ等を外部から保護すると共に発光素子(10 Emitting element to protect from the outside and comprising a wire or the like (10
2)(502)からの光を所望の方向に発光するものである。 The light from the 2) (502) is for emitting in a desired direction.
本発明のモールド部材(101)(501)は、凸状のレンズ形状を含み、凸状の略先端から端部までの曲面半径がそれぞれ異なる発光ダイオードを構成させてある。 The mold member of the present invention (101) (501) includes a convex lens shape, radius of curvature from approximately the distal end of the convex to the end are to constitute the different light-emitting diodes. そのため、 for that reason,
曲率半径の小さい部位では、発光素子(102)(502)からの光を光軸上に集光し軸上光度を上げ高効率化を図ることができる。 The sites of small radius of curvature, it is possible to achieve high efficiency increasing the condensed axial intensity of light on the optical axis from the light-emitting element (102) (502).

【0021】さらに、信号用発光ダイオードなどは、曲率半径の小さい曲面を太陽光などが入射される上方向に配置する。 Furthermore, etc.-signal light-emitting diode, a small radius of curvature curved surface arranged in a direction on such as sunlight is incident. これにより、光軸上の正面光度を向上させつつ、上方向よりも曲率半径の大きい左右方向や下方向の光をよりワイドに広げさせることができる。 Thus, while improving the front brightness of the optical axis, it is possible to let spread light in large lateral direction and downward direction of the radius of curvature than the upper direction more wide. また、曲率半径の小さい方向から入射する太陽光などの外来光の反射を減少させることができる。 Further, it is possible to reduce reflection of the external light such as sunlight that is incident from the direction of small radius of curvature.

【0022】モールド部材(101)(501)には、着色剤、光安定化材、拡散剤や蛍光体など種々の添加剤を含有させることもできる。 [0022] The molding member (101) (501), a colorant, a light stabilizer, may be contained various additives such as spreading agents and phosphor. モールド部材(101)(501)に着色剤を含有させることにより所望外の波長をカットするフィルターの役目をもたすこともできる。 Mold member (101) by a colorant in the (501) may be Motas the role of a filter for cutting wavelength of the desired outside. また、拡散剤を含有させることによって発光素子(102)(502)からの指向性を緩和させ視野角を増やすことができる。 Further, it is possible to increase the viewing angle to relax the directivity from the light emitting element (102) (502) by incorporating a diffusing agent. さらに、蛍光体を含有させることで混色光を発光させることもできる。 Furthermore, it is also possible to emit mixed color light by the inclusion of phosphor. 特に、比較的エネルギーの大きい光を放出可能な窒化物半導体からなる発光素子と、発光素子から放出される光によって励起されそれよりも長波長光を発光する蛍光体との組み合わせにより高輝度に混色光が発光可能な発光ダイオードとすることができる。 In particular, a light emitting element comprising a relatively energy large light from possible nitride semiconductor emission, color mixing in a high intensity by a combination of phosphors excited by the light emitted for emitting long wavelength light than that from the light emitting element it can light a light emitting capable emitting diodes. 発光素子からの光と蛍光体からの光が互いに補色関係にある場合、白色光を発光可能となる。 If light from the light and phosphor from the light emitting element is in complementary relationship, and can emit white light. このような蛍光体としてセリウムで付活されたイットリウム・アルミニウム・ガーネット系蛍光体やペリレン系誘導体が好適に挙げられる。 Such phosphor cerium activated yttrium aluminum garnet phosphor and perylene derivatives as are preferably exemplified.

【0023】モールド部材(101)(501)の具体的材料としては、エポキシ樹脂、ユリア樹脂やイミド樹脂などの耐候性に優れた透光性樹脂やガラスなどが好適に用いられる。 [0023] As a specific material of the mold member (101) (501), epoxy resins, such as weather resistance excellent translucent resin or glass such as urea resin or an imide resin is preferably used. また、拡散剤としては、チタン酸バリウム、酸化チタン、酸化アルミニウム、酸化珪素等が好適に用いられる。 As the diffusing agent, barium titanate, titanium oxide, aluminum oxide, silicon oxide or the like is preferably used. このようなモールド部材(101)(501)は、インサート成形やポッティング法などにより比較的簡単に形成することができる。 Such molding member (101) (501) can be relatively easily formed by insert molding or the like or a potting method.

【0024】なお、本発明の曲率半径とは、球面における曲率半径だけでなく、実質的に本発明の効果を奏する限り放物や楕円などの非球面における近似したものをも含んでいる。 [0024] Note that the curvature radius of the present invention, not only the curvature radius of the spherical and also include an approximation of the non-spherical surface such as parabolic or elliptical as long as the effect of substantially present invention. したがって、楕円などの非球面の場合は、 Therefore, in the case of a non-spherical such as oval,
擬似的に短軸の大きさの大小で判断することができる。 Pseudo can be determined by the minor axis size of the large and small.
同様に、近似した曲率は光軸上の発光観測面側から見たレンズ倍率で比較することもできる。 Similarly, curvature close can also be compared with the lens magnification viewed from the light emission observing surface side of the optical axis. また、球面と非球面との組み合わせにおいては、曲率半径と短軸との大小で判断することもできる。 In the combination of spherical and non-spherical, it can also be determined by the magnitude of the curvature radius and a minor axis.

【0025】具体的には、(近似した)第1の曲率を含むレンズ面の倍率を第1のレンズ倍率、(近似した)第2の曲率を含むレンズ面の倍率を第2のレンズ倍率、 [0025] Specifically, (approximate) magnification first lens magnification of the lens surface including a first curvature, (approximated) the magnification of the lens surface including the second curvature second lens magnification,
(近似した)第3の曲率を含むレンズ面の倍率を第3のレンズ倍率、(近似した)第4の曲率を含むレンズ面の倍率を第4のレンズ倍率の大きさとそれぞれ分ける。 (Approximated) the magnification of the lens surface including a third curvature of the third lens magnification (approximate) divides the power of the lens surface including a fourth curvature of each the size of the fourth lens power.

【0026】モールド部材(101)(501)の部分的レンズ倍率は、それぞれ第2のレンズ倍率≦第3のレンズ倍率、 The partial lens magnification, respectively second lens magnification ≦ third lens magnification of the mold members (101) (501),
第4のレンズ倍率<第1のレンズ倍率の関係(第2のレンズ倍率≦第3のレンズ倍率=第4のレンズ倍率<第1 The fourth lens magnification <first lens magnification relationship (second lens magnification ≦ third lens magnification = fourth lens magnification <First
のレンズ倍率の関係)を満たすこととなる。 It would meet lens magnification relationship) of. この場合、 in this case,
光軸上の発光観測面側から発光ダイオードを観測すると本発明の特定のモールド形状(101)(501)のレンズ効果により、図1の如き、発光素子(102)やリード端子(103)、 When observing the light emitting diode from emitting observation side on the optical axis a particular mold shape of the present invention (101) by the lens effect of the (501), such as FIG. 1, the light emitting element (102) and lead terminals (103),
(104)が歪に配置されたように観測される。 (104) is observed as being arranged distortion.

【0027】(発光素子102、502)本発明に用いられる発光素子(102)(502)は、電力の供給を受けて発光可能な半導体発光素子である。 The light emitting element used in the (light-emitting element 102,502) present invention (102) (502) is capable of emitting semiconductor light emitting device supplied with electric power. このような半導体発光素子は、液相成長法やMOCVD法等により基板上に種々の半導体材料を積層した構造が挙げられる。 Such a semiconductor light emitting element, a structure formed by stacking various semiconductor materials on a substrate and the like by the liquid phase growth method or a MOCVD method or the like. 半導体発光素子の発光層に用いられる具体的材料としては、GaA Specific materials used in light-emitting layer of the semiconductor light emitting element, GaA
s、GaP、GaAlAs、GaAsP、AlGaIn s, GaP, GaAlAs, GaAsP, AlGaIn
P、GaN、InN、AlN、InGaN、InGaA P, GaN, InN, AlN, InGaN, InGaA
lN等が好適に挙げられる。 lN, and the like preferably. 発光素子(102)(502)の構造としては、MIS接合、pn接合、PIN接合を有するホモ接合、ヘテロ接合やダブルへテロ構造などが挙げられる。 The structure of the light emitting element (102) (502), MIS junction, pn junction, homojunction having a PIN junction, a heterostructure and the like to the heterojunction and double. また、発光層を量子効果が生ずる単一量子井戸構造や多重量子井戸構造とすることができる。 Further, the light-emitting layer may be a single quantum well structure or multiple quantum well structure quantum effect. 半導体層の材料やその混晶度によって発光波長を紫外域から赤外域まで種々選択することができる。 Materials and emission wavelengths by the mixed crystal ratio of the semiconductor layer can be variously selected from ultraviolet to infrared.

【0028】具体的一例として、窒化物系化合物半導体発光素子を示す。 [0028] As a specific example, showing a nitride-based compound semiconductor light-emitting device. 窒化物系化合物半導体発光素子は、サファイヤ基板上にGaN、AlNやGaAlN等のバッファー層を形成しその上にpn接合を有する窒化ガリウム半導体を形成させる。 Nitride-based compound semiconductor light-emitting device, GaN on a sapphire substrate, forming a buffer layer such as AlN and GaAlN to form a gallium nitride semiconductor having a pn junction thereon. 窒化ガリウム系半導体は、不純物をドープしない状態でn型導電性を示す。 Gallium nitride semiconductor shows n-type conductivity when not doped with impurities. なお、発光効率を向上させる等所望のn型窒化ガリウム半導体を形成させる場合は、n型ドーパントとしてSi、Ge、S In the case of forming a desired n-type gallium nitride semiconductor such as improving the luminous efficiency, Si as an n-type dopant, Ge, S
e、Te、C等を適宜導入することが好ましい。 e, Te, it is preferable to appropriately introduce C like.

【0029】一方、p型窒化ガリウム半導体を形成させる場合は、p型ドーパンドであるZn、Mg、Be、C On the other hand, when forming a p-type gallium nitride semiconductor is a p-type dopant Zn, Mg, Be, C
a、Sr、Ba等をドープさせる。 a, Sr, it is doped with Ba and the like. 窒化ガリウム半導体は、p型ドーパントをドープしただけでは低抵抗化しにくいためp型ドーパント導入後に、低電子線照射、プラズマ照射や熱処理することで低抵抗化させることが好ましい。 Gallium nitride semiconductor is only doped with a p-type dopant after p-type dopant introduction for hard to lower resistance, low electron beam irradiation, allowing low resistance by plasma irradiation or heat treatment is preferred. その後、pn各半導体に電力が供給できるよう、 Then, as it can supply electric power to pn respective semiconductor,
各半導体のコンタクト層表面をエッチングにより露出させる。 Each semiconductor contact layer surface is exposed by etching. 各導電型のコンタクト層に電力を供給する電極をスパッタリング法や真空蒸着法などにより形成させる。 An electrode for supplying power to the contact layer of the conductivity type is formed by a sputtering method or a vacuum evaporation method.
p型電極は、透光性の全面電極(407)としての金属薄膜と、ワイヤーボンドさせるパッド電極(408)とをそれぞれ形成させてある。 p-type electrode includes a metal thin film as a light-transmitting full-surface electrode (407), they are allowed to form, respectively and the pad electrode (408) for wire bonding.

【0030】成膜された半導体ウエハーは、ダイヤモンド製の刃先を有するブレードが回転するダイシングソーにより直接フルカットするか、又は刃先幅よりも広い幅の溝を切り込んだ後(ハーフカット)、外力によって半導体ウエハーを割る。 The deposited semiconductor wafer, or a blade having a cutting edge made of diamond directly full-cut with a dicing saw which rotates, or after having cut a groove wider than the cutting edge width (half-cut), by an external force dividing the semiconductor wafer. あるいは、先端のダイヤモンド針が往復直線運動するスクライバーにより半導体ウエハーに極めて細いスクライブライン(経線)を例えば碁盤目状に引いた後、外力によってウエハーを割り半導体ウエハーからチップ状にカットする。 Alternatively, after subtraction of very fine scribe lines (meridian), for example, in a grid pattern on the semiconductor wafer by a scriber in which a diamond needle tip is linearly reciprocated to cut the wafer from the split semiconductor wafer into chips by an external force.

【0031】野外などの使用を考慮する場合、高輝度な半導体材料として黄色、緑色、青色や青緑色等を発光する半導体材料として窒化物系化合物半導体(In x Ga y [0031] When considering the use of such field, yellow as a high luminance semiconductor material, green, blue or blue nitride-based compound semiconductor green or the like as a semiconductor material that emits light (In x Ga y
Al Al z N、但し、0≦x、0≦y、0≦z、x+y+z z N, where, 0 ≦ x, 0 ≦ y , 0 ≦ z, x + y + z
=1)を用いることが好ましく、同様に、黄色や赤色ではアルミニウム、インジウム、ガリウム、燐系半導体を用いることが好ましいが、用途によって種々利用できることは言うまでもない。 = 1) is preferably used, similarly, the aluminum is yellow or red, indium, gallium, it is preferable to use phosphorus-based semiconductor, it goes without saying that various utilized by applications.

【0032】信号用の青色、黄色或いは青緑色が高輝度に発光可能な発光素子として、通常、窒化物系化合物半導体を用いた発光素子は、赤色や黄色が発光可能な4元系のAlInGaPなどの材料を用いた発光素子と異なり、同一半導体表面側に正極(408)及び負極(409)の電極を形成させる場合がある。 The blue signal, as a light emitting capable emitting element yellow or blue-green color to the high luminance, usually, the light emitting device using a nitride-based compound semiconductor, red or yellow and AlInGaP of quaternary capable of emitting light Unlike the light-emitting element using a material, there is a case of forming the electrodes of the positive electrode (408) and negative (409) on the same semiconductor surface. また、活性層(404)を挟んで組成の異なるダブルへテロ構造(403)(405)としてある。 Further, there is a heterostructure different compositions across the active layer (404) double (403) (405).

【0033】発光素子(102)から放出される光は、発光素子(102)の表面から放出されるものの他、ダブルへテロ構造などのため活性層(404)などを導波管の如く伝搬して放出される光もある。 The light emitted from the light emitting device (102), others are released from the surface of the light emitting element (102), an active layer for terrorism structures, etc. (404) propagates as a waveguide to double light emitted Te also. そのため活性層(404)端面側から放出された光の一部は、発光素子(102)に電力を供給する電極(409)の陰になる。 Therefore a portion of the light emitted from the active layer (404) end face side is behind the electrode for supplying electric power to the light emitting element (102) (409). 通常、電極(409)は光を遮光するW、Al、TiやInなどの金属や合金が用いられている。 Usually, the electrode (409) is W for blocking light, Al, a metal or alloy such as Ti and In are used. この電極(409)の陰により発光素子の放出された光は、等方的に均一に発光できない。 The emitted light of the shade by the light emitting element of the electrode (409) can not be isotropically uniform light emission. 特に、窒化ガリウム系化合物半導体は、可視光に対して透過性がよいので顕著に現れることとなる。 In particular, gallium nitride compound semiconductors, so that remarkable since good permeability to visible light.

【0034】一方、発光ダイオードから放出される光は、モールド部材(101)(501)により集光させ所望の発光特性を持たせることができる。 On the other hand, light emitted from the light emitting diode can have a desired emission characteristic is condensed by a mold member (101) (501). しかしながら、モールド部材(101)(501)により集光された光は、発光素子(102) However, the mold member (101) light collected by the (501), the light emitting element (102)
(502)から放出された光に大きく依存する。 Largely depends on the light emitted from the light (502). 特に、発光素子(102)(502)からの光を特定方向に発光させるためモールド部材(101)(501)を特定形状とさせた発光ダイオードにおいては、発光素子(102)(502)が配置されたマウント・リード(103)(503)のカップ(410)から放出される光の指向特性が、光学レンズによる指向特性よりも大きく影響する。 In particular, in the light-emitting element (102) mold member (101) for lighting in a specific direction of light from the (502) (501) light emitting diodes obtained by the specific shape, the light emitting element (102) (502) are arranged directional characteristics of light emitted from the cup (410) of the mount lead (103) (503) was found to affect larger than the directivity characteristics of an optical lens. そのため、発光素子(102)(502)から等方的に均一光が発光されなければ所望通りの発光特性を得難い傾向にある。 Therefore, isotropically uniform light from the light emitting element (102) (502) tends to hardly obtain the light emission characteristics as desired to be luminous.

【0035】本発明は発光素子(102)(502)から異方性を持って放出される光とモールド部材(101)(501)の形状を考慮して発光素子(102)(502)を配置させる。 The present invention is disposed a light emitting element (102) light and the mold member is released with anisotropy from (502) (101) light emitting device by considering the shape of the (501) (102) (502) make. 曲率半径(擬似的な曲率を含む)が大きくレンズ倍率の小さい曲面においては集光力が低いため発光素子(102)(502)からの光量が多いことが望ましい。 It is preferable light quantity from the radius of curvature for focusing the light power is low in the small curved surfaces (pseudo including curvature) is large lens magnification emitting element (102) (502) is large. 他方、曲率半径(擬似的な曲率を含む)が小さくレンズ倍率の大きい曲面は、視野角を広げることに寄与する割合が少なく光軸上は集光力が高いため発光素子(102)(502)からの光量が比較的少なくても良い。 On the other hand, the radius of curvature larger curved surface (pseudo including curvature) is small lens magnification, since the optical axis smaller proportion contributes to enlarging the viewing angle is high condensed power light emitting device (102) (502) amount of light from the may be relatively small. これらを考慮することにより所望通りの発光特性を得られる発光ダイオードとしたものである。 It is obtained by a light-emitting diode obtained emission characteristics as desired by considering these.
すなわち、カップ(410)上に配置された発光素子(102)に電力を供給することにより光軸上の発光観測面側から放出される光が均一に放出されない場合、モールド部材(1 That is, when the light emitted from the light emission observing surface side of the optical axis by supplying power to the cup (410) disposed on the light emitting element (102) is not uniformly discharged, the mold member (1
01)の曲率半径が最も小さい部位と光軸に対して対称に発光素子(102)の最も発光の暗い部分が配置されるようモールド部材(101)と発光素子(102)を配置させる。 01) radius of curvature to arrange the mold member (101) and the light emitting element (102) so that the darkest part of the light emission of the light emitting element symmetrically (102) is placed against the lowest part and the optical axis of the.

【0036】また、発光素子(502)から等方的に発光する場合においても導電性ワイヤー(505)の陰になるなどモールド部材(501)がない場合における光軸上の発光観測面側からみて暗い部位が生ずる場合がある。 Further, not seen from light emission observing surface side of the optical axis in the case where there is no sealing member, such as also in the shadow of a conductive wire (505) (501) when the isotropically emitted from the light emitting element (502) there is a case in which a dark site occurs. この場合も、モールド部材(501)の曲率半径が最も小さい部位と光軸に対して対称に光軸上の発光観測面側から見て最も暗い部位がくるように配置させる。 In this case, it is arranged in such a manner that darkest part as viewed from the light emission observing surface side of the optical axis symmetrically with respect to the radius of curvature is the smallest portion and the optical axis of the mold member (501). これらにより、最も効率よく所望の発光特性を得られる発光ダイオードとすることができる。 These makes it possible to most efficiently the LED produced the desired emission characteristics.

【0037】(リード端子103、104、503、5 [0037] (lead terminal 103,104,503,5
04)リード端子(103)(104)(503)(504)は、発光素子(1 04) lead terminal (103) (104) (503) (504), the light emitting element (1
02)(502)に外部から電力を供給する電極として働く。 02) acts as an electrode for supplying electric power from the outside (502). したがって、リード端子(103)(104)(503)(504)は、十分な電気伝導性とボンデイングワイヤー等との接続性が求められる。 Thus, the lead terminals (103) (104) (503) (504), sufficient electric conductivity and connectivity with the bonding wires and the like are required. リード端子(103)(503)上に発光素子(102)(502) Lead terminals (103) (503) on the light emitting element (102) (502)
を配置させる場合は、マウントリードなどとして働き、 If you want to place the acts as such mount lead,
発光素子(102)(502)を積載させないで導通を採るものはインナー・リードとして働く。 Emitting element (102) (502) that takes the conduction is not loaded with acts as an inner lead.

【0038】本発明において、発光ダイオードからの発光を効率よく発光させるためには、発光素子の発光部を光学レンズとなるモールド部材(101)(501)の光軸上に配置することが好ましい。 [0038] In the present invention, in order to light emitted from the light-emitting diode efficiently emit light is preferably disposed on the optical axis of the mold member that the light emitting portion becomes an optical lens of the light emitting element (101) (501). この場合、光軸上の発光観測面側から見た先端からの各曲率半径が異なるため曲率半径の小さい第1の曲率半径側(上方)にリード端子が偏ることとなる。 In this case, a biased lead terminals emission observing surface side from the saw first radius of curvature side each radius of curvature is small radius of curvature for different from the tip of the optical axis (upper). リード端子とモールド部材との端面との距離が短い場合は、膨張係数の違いなどにより破壊され易い傾向にある。 If the distance between the end faces of the lead terminals and the mold member is short, it tends to easily be broken due to differences in expansion coefficients. そのため、マウント・リードとインナー・リード間の方向をよりモールド部材(101)(501)端面との距離がかせげる平行方向とすることが好ましい。 Therefore, more mold member (101) orientation between the mount lead and the inner lead (501) it is preferred that the distance between the end face and parallel to earn.

【0039】一方、モールド部材(101)(501)の強度が高い或いは、柔軟性がある場合は、基板の取り付け時にリード端子間(マウント・リード(103)(503)とインナー・ On the other hand, the strength of the mold members (101) (501) higher or, if there is a flexible, Inner and between the lead terminals during mounting of the substrate (Mount lead (103) (503)
リード(104)(504)間)方向の方が移動しにくいことからマウント・リード(103)(503)とインナー・リード(104) Lead (104) (504) between) mounted from the direction of the direction is difficult to move and read (103) (503) and the inner leads (104)
(504)間の方向を第1の曲率半径(上方)及び第2の曲率半径間(下方)方向に配置させることもできる。 (504) the direction between can also be disposed on the first radius of curvature (upper) and between the second radius of curvature (downward) direction. リード端子間方向は、基板に取り付けても傾斜しにくいことから安定した発光特性を得ることができる。 Between the lead terminals direction can obtain stable emission characteristics since it hardly inclined be attached to the substrate.

【0040】マウント・リード(103)上に発光素子(102) The light-emitting element over the mount lead (103) (102)
を配置させる場合は、熱硬化性樹脂などによって行うことができる。 Case of placing can be carried out by such a thermosetting resin. 具体的には、エポキシ樹脂、シリコーン樹脂、アクリル樹脂やイミド樹脂などが挙げられる。 Specifically, epoxy resins, silicone resins, and acrylic resin or imide resin. また、発光素子(502)とマウント・リード(503)とを接着させると共に電気的に接続させるためにはAgペースト、 The light emitting element (502) and the mount lead (503) electrically with adhering connected to cause for the Ag paste,
カーボンペースト、ITOや金属バンプ等を用いることができる。 It may be used carbon paste, ITO, metal bumps or the like. さらに、各発光素子(102)(502)の発光効率を向上させるためにカップ表面に反射機能を持たせても良い。 Furthermore, it may be provided with the reflection function on the cup surface in order to improve the emission efficiency of each light emitting element (102) (502).

【0041】リード端子(103)(104)(503)(504)に用いられる具体的な比抵抗としては、300μΩ・cm以下が好ましく、より好ましくは、3μΩ・cm以下である。 [0041] As a specific resistivity which is used to the lead terminal (103) (104) (503) (504) is preferably not more than 300μΩ · cm, more preferably not more than 3μΩ · cm.
また、発光素子からの発熱を効率よく外部に逃がすべくリード端子(103)(104)(503)(504)は、熱伝導度がよいことが求められる。 Further, lead terminals to dissipate heat generated from the light emitting element to the outside efficiently (103) (104) (503) (504), the thermal conductivity is good is determined. 特に、発光素子(102)(502)が配置されるマウント・リード(103)(503)は、他のリード端子(10 In particular, the mount lead (103) of the light emitting element (102) (502) is arranged (503), the other lead terminal (10
4)(504)よりも表面積を大きくさせ放熱性を向上させることが好ましい。 4) (504) it is preferable to improve heat dissipation by increasing the surface area than. リード端子(103)(104)(503)(504)の具体的な熱伝導性は、0.01cal/(s)(cm 2 Lead terminals (103) (104) (503) specific thermal conductivity (504), 0.01cal / (s) (cm 2)
(℃/cm)以上が好ましく、より好ましくは 0.5 (° C. / cm) or more, more preferably 0.5
cal/(s)(cm 2 )(℃/cm)以上である。 cal / (s) (cm 2 ) is (° C. / cm) or more. また、これらの条件を満たす材料としては、鉄、銅、鉄入り銅、錫入り銅等が挙げられる。 Moreover, as these conditions are satisfied materials, iron, copper, iron-containing copper, tin-containing copper, and the like.

【0042】また、発光素子(102)(502)とリード端子(1 Further, the lead terminal light emitting elements (102) (502) (1
03)(104)(503)(504)とを電気的に接続させるためには電気的接続部材が用いられる。 03) (104) (503) (504) in order to electrically connect the electrical connection member is used. 電気的接続部材は、発光素子(102)(502)とリード端子(103)(104)(503)(504)とを金属線で接続させた導電性ワイヤー(105)(505)でも良いし、導電ペーストや金属バンプで形成させても良い。 Electrical connection member, the light emitting element (102) (502) and lead terminals (103) (104) (503) (504) a conductive wire (105) which is connected by a metal wire and (505) also to good, it may be formed of a conductive paste or a metal bump. 電気的接続部材は、オーミック性、機械的接続性、電気伝導性及び熱伝導性がよいものが求められる。 Electrical connection member may include an ohmic resistance, mechanical connectivity, what good electrical conductivity and heat conductivity. 電気的接続部材の熱伝導度としては0.01cal/(s)(cm The thermal conductivity of the electrical connection member 0.01cal / (s) (cm
2 )(℃/cm)以上が好ましく、より好ましくは0. 2) (℃ / cm) or more, more preferably 0.
5cal/(s)(cm 2 )(℃/cm)以上である。 5cal / (s) (cm 2 ) is (° C. / cm) or more.
具体的には、金、銅、白金、アルミニウム等及びそれらの合金を用いたボンデイングワイヤーが挙げられる。 Specifically, gold, copper, platinum, and a bonding wire using aluminum or the like and alloys thereof. また、銀、カーボン、ITO等の導電性フィラーを樹脂で充填した導電性接着剤等を用いることもできる。 Further, silver, carbon, a conductive filler such as ITO may be used a conductive adhesive filled with a resin or the like. 作業性を考慮してアルミニウム線あるいは金線が好ましい。 Aluminum wire or a gold wire in consideration of the workability is preferred. 以下、本発明の実施例について詳述するが、これのみに限られないことはいうまでもない。 Hereinafter will be described in detail embodiments of the present invention, of course, not limited to this.

【0043】 [0043]

【実施例】(実施例1)発光素子として、発光ピークが500nmのInGaN半導体を発光層に用いたLED As EXAMPLES (Example 1) light emitting device, LED light emission peak with 500nm of InGaN semiconductor light-emitting layer
チップは、洗浄されたサファイア基板(401)上に、TM Chip, on the cleaned sapphire substrate (401), TM
G(トリメチルガリウム)ガス、TMI(トリメチルインジュウム)ガス、窒素ガス及びドーパントガスをキャリアガスと共に流し、MOCVD法で窒化物系化合物半導体を成膜させることにより形成させた。 G (trimethyl gallium) gas, TMI (trimethyl indium-) gas, nitrogen gas and dopant gas flowed together with a carrier gas, was formed by depositing a nitride compound semiconductor by the MOCVD method. 成膜時に、ドーパントガスとしてSiH 4とCp 2 Mgと、を切り換えることによってn型導電性やp型導電性を有する窒化ガリウム半導体を形成させる。 At the time of film formation, SiH 4 and Cp 2 Mg and a gallium nitride semiconductor having n-type conductivity and p-type conductivity is formed by switching as a dopant gas. 発光素子としては、n型導電性を有する窒化ガリウム半導体であるコンタクト層(4 As the light-emitting element, a contact layer which is gallium nitride semiconductor having n-type conductivity (4
03)と、p型導電性を有する窒化ガリウムアルミニウム半導体であるクラッド層(405)、p型導電性を有するコンタクト層(406)を形成させた。 03), a cladding layer (405 a gallium nitride aluminum semiconductor having p-type conductivity), to form a contact layer (406) having a p-type conductivity. n型導電性を有するコンタクト層(403)と、p型導電性を有するクラッド層(40 Cladding layer having a contact layer (403), a p-type conductivity having n-type conductivity (40
5)との間に厚さ約3nmであり、単一量子井戸構造とされるノンドープInGaNの活性層(404)を形成した。 5) a thickness of about 3nm between, to form an active layer of undoped InGaN is a single quantum well structure (404).
(なお、サファイア基板上(401)には、低温で窒化ガリウムを形成させバッファ層(402)としてある。) 同一半導体表面側から正極(407)(408)及び負極(409)の電極を取るためにn型半導体であるコンタクト層(403) (Note that on the sapphire substrate (401), a buffer layer to form a gallium nitride at a low temperature is as (402).) The positive electrode of the same semiconductor surface (407) (408) and for taking the electrode of the negative electrode (409) a contact layer which is an n-type semiconductor (403)
の一部までp型半導体層側から半導体層を部分的に除去させてある。 It is the semiconductor layer from the p-type semiconductor layer side to a portion partially removed for. 除去され露出したn型コンタクト層となる半導体(403)表面には、活性層(404)の厚みを越える厚さの電極(409)がスパッタリング法により形成されている。 The removed the exposed n-type contact layer semiconductor (403) surface, the thickness of the electrodes which exceeds the thickness of the active layer (404) (409) is formed by sputtering. 他方、p型コンタクト層上には透明電極及びパッド電極を形成させてある。 On the other hand, the p-type contact layer are allowed to form a transparent electrode and a pad electrode. こうして出来上がった半導体ウエハーをスクライブラインを引いた後、外力により分割させ発光素子として青緑色が発光可能なLEDチップを形成させた。 After subtracting the scribe line of the semiconductor wafer thus finished, blue-green as the light emitting element is divided by the external force to form a light-emitting LED capable chips. LEDチップに電力を供給すると青緑色光が発光可能なLEDチップが形成された。 LED chips can emit blue-green light when power to a LED chip is formed. 発光しているLEDチップの放射方向を調べた結果、n型コンタクト層上に形成された電極は、活性層から放出される光を遮光する。 Result of examining the emission direction of the LED chip that emits light, which is formed on the n-type contact layer on the electrode is to shield the light emitted from the active layer. 発光観測面側から見て、活性層(404)から放出された光のうちn型電極(409)の延長方向には発光が少なく最も暗く観測された。 When viewed from the light emission observation surface side and the extending direction of the n-type electrode of the light emitted from the active layer (404) (409) was observed emitting less darkest.

【0044】銀メッキした鉄入り銅製のリード端子(10 The silver-plated iron-containing copper lead terminal (10
3)(104)の先端にカップ(410)を有するマウント・リード 3) (Mount lead having a cup (410) at the tip of 104)
(103)にLEDチップ(102)をエポキシ樹脂でダイボンディングした。 The LED chip (102) and die bonding with epoxy resin (103). マウント・リード(103)に設けられたLE LE provided on the mount lead (103)
Dチップ(102)の配置は、リード端子(103)(104)間方向とLEDチップ(102)の電極(408)(409)間方向とが略垂直に配置させてある。 D chip placement (102), are allowed to place the lead terminals (103) (104) between the direction and the LED electrode (408) of the chip (102) (409) and between the direction substantially perpendicular. LEDチップ(102)の各電極(408) Each electrode of the LED chip (102) (408)
(409)とマウント・リード(103)及びインナー・リード(1 (409) and the mount lead (103) and the inner lead (1
04)とをそれぞれ直径が30μmの金線(105)でワイヤーボンディングし電気的導通を取った。 04) and the respectively diameter took electrically conductive wire-bonded with 30μm gold wire (105).

【0045】一方、モールド部材(101)の金型として、 On the other hand, as the die of the mold member (101),
第1の曲率半径(上方)、第3、第4の曲率半径(左右方向)及び第2の曲率半径(下方)の大きさが第1の曲率半径の大きさ<第3の曲率半径の大きさ=第4の曲率半径の大きさ<第2の曲率半径の大きさの関係を満たす凸状の透光性モールド部材(101)が形成可能な凹部を形成させている。 The first radius of curvature (upper), third, fourth radius of curvature (lateral direction) and magnitude is the magnitude of the first radius of curvature of the second radius of curvature (downward) <the third radius of curvature magnitude is = fourth radius of curvature of the magnitude <second radius of curvature satisfying the magnitude relationship convex translucent mold member (101) is to form a formable recess.

【0046】凹部内に活性層(404)からの光を遮光するn型電極(409)と第2の曲率半径を持った曲面とが最も近づくようにLEDチップ(102)が配置されたリード端子(103)(104)を配置し、エポキシ樹脂を注入した。 The lead active layer in the concave portion n-type electrode to shield light from the (404) and (409) second curvature radius has a curved surface and is closest as LED chips (102) are disposed terminal (103) a (104) arranged, injected with epoxy resin. エポキシ樹脂を140℃5時間で硬化させた。 The epoxy resin was cured at 140 ° C. 5 hours. 形成されたモールド部材(101)の先端(201)は、LEDチップ(102)の光軸上に配置されている。 Tip of the formed mold member (101) (201) is disposed on the optical axis of the LED chip (102).

【0047】形成された発光ダイオードは、透光性モールド部材(101)の先端(201)を通る光軸を含む断面を構成する先端(201)から端部(202)までの第1の曲率半径の大きさが約3であり、先端(201)から他方の端部(203)までの第2の曲率半径の大きさが約3.75である。 The formed light-emitting diode, the first radius of curvature from the distal end (201) constituting the cross section including an optical axis passing through the tip (201) of the translucent mold member (101) to the edge (202) size is about 3, is about 3.75 second magnitude of the radius of curvature of the tip (201) to the other end (203). また、 Also,
前記断面と垂直をなす光軸を含む断面を構成する先端(2 Tip constituting the section including the optical axis that forms the cross-section perpendicular (2
01)から端部(204)までの第3の曲率半径及び先端(201) End 01) (204) third radius of curvature and the tip to (201)
から他方の端部(205)までの第4の曲率半径の大きさが、それぞれ約3.5とさせてある。 The other end (205) Fourth curvature radius value of from to is, are respectively taken as about 3.5. また、LEDチップ(102)とモールド部材(101)の配置は、LEDチップ(1 The arrangement of the LED chips (102) and the mold member (101), LED chip (1
01)から放出されてカップ(410)で反射した光が最も暗い方向にモールド部材(101)の曲率半径の小さい面が配置されている。 Small radius of curvature face of the mold member is in the darkest direction light reflected by being released cup (410) (101) is arranged from 01).

【0048】形成された発光ダイオードに電力を供給して、左右の配向特性方向及び上下の配向特性を調べた。 [0048] providing power to the formed light-emitting diodes, it was examined orientation characteristics direction and the vertical orientation characteristics of the left and right.
発光強度が最も高いところを100%とし相対発光強度を図6に示す。 To the place luminous intensity is the highest is 100% showing the relative light emission intensity in FIG. 上方向の光が少なく左右及び下方向に視野角が広い高輝度発光ダイオードとすることができることが確認できた。 That can be the viewing angle to the light is small lateral and downward direction of the upper direction is the wide high-brightness light-emitting diode was confirmed.

【0049】(実施例2)透光性モールド部材(101)の先端(201)を通る光軸を含む断面を構成する先端(201)から端部(202)までの第1の曲率半径の大きさ(楕円の短軸)が約3.2であり、長軸は約4.1とする。 [0049] (Example 2) translucent mold member (101) of the tip (201) from the tip (201) constituting the cross section including an optical axis passing through the first radius of curvature to the end (202) size is the (minor axis of the ellipse) is about 3.2, the long axis is about 4.1. 先端(2 Tip (2
01)から他方の端部(203)までの第2の曲率半径の大きさ(楕円の短軸)が約3.6であり、長軸が約4.55とする。 The other end portion 01) (203) to the second radius of curvature of the size of (the minor axis of the ellipse) of about 3.6, the long axis is about 4.55. また、前記断面と垂直をなす光軸を含む断面を構成する先端(201)から端部(204)までの第3の曲率半径(楕円の短軸)及び先端(201)から他方の端部(205)までの第4の曲率半径(楕円の短軸)の大きさが、それぞれ約3.5とさせる。 Further, the cross-section and the end portion from the tip (201) constituting the cross section including the optical axis perpendicular (204) to the third radius of curvature (minor axis of the ellipse) and the other end from the tip (201) ( size of up to 205) a fourth radius of curvature (minor axis of the ellipse) is to respectively about 3.5. また、この楕円の長軸を4.35とした楕円で表される非球面とした以外は実施例1と同様にして発光ダイオードを形成させた。 In addition, the major axis of the ellipse except that the non-spherical surface represented by the ellipse and 4.35 to form a light-emitting diode in the same manner as in Example 1.

【0050】形成された発光ダイオードのモールド形状は、先端を通る光軸を含む透光性モールド部材の断面を構成する先端から端部までを含む第1のレンズ倍率、先端から他方の端部までを含む第2のレンズ倍率、光軸を含む前記断面と垂直をなす断面を構成する先端から端部までを含む第3のレンズ倍率及び先端から他方の端部までを含む第4のレンズ倍率がそれぞれ、第2のレンズ倍率<第3のレンズ倍率=第4のレンズ倍率<第1のレンズ倍率の関係を満たしてある。 The mold shape of the formed light-emitting diode, a first lens magnification containing from tip constituting the cross section of the translucent mold member including an optical axis passing through the tip to the end, from the tip to the other end the second lens power which includes a fourth lens power including from the distal end constituting a cross-section which forms the cross section perpendicular including an optical axis from the third lens magnification and tip up to and including the end to the other respectively are met second lens magnification <third lens magnification = fourth lens magnification <first lens magnification relationship. なお、形成された発光ダイオードを発光観測面側から観測するとモールド部材の外周連続した曲線を構成すると共に第1、第3及び第4 Incidentally, when the formed light-emitting diode observed from emission observing surface side first as to constitute an outer continuous curve mold member, the third and fourth
の曲率半径を含む上方の曲面は楕円を構成するのに対し、第2、第3及び第4の曲率半径を含む下方の曲面は半円を構成している。 Above the curved surface comprising a radius of curvature relative to constitute an elliptical, lower curved surface including the second, third and fourth radius of curvature constitute a semicircle. また、楕円は、半円の半径よりも小さい短軸を有ている。 Moreover, the ellipse has have a minor axis smaller than the radius of the semicircle.

【0051】こうして形成された発光ダイオードの発光特性は実施例1と同様に左右、下方向に広く上方向に狭くすることができる。 [0051] Thus emission characteristics of the formed light-emitting diode is left in the same manner as in Example 1, it is possible to narrow the broad upward downward. 形成された発光ダイオードの指向特性をそれぞれ揃えて発光観測面側から見て円状となるよう基板に300個配置させる。 To directional characteristics of the formed light emitting diodes disposed 300 on the substrate so as to be circular when viewed from the light emission observing surface side aligned respectively. 基板に設けられた配線パターンと各発光ダイオードが点灯可能なように半田付けさせる。 Wiring pattern and the light emitting diode provided on the substrate causes soldered so as to be lighted. これを樹脂筐体に配置させると共に樹脂筐体の前面に透光性のケースを設けてある。 This is provided with a translucent case in front of the resin casing causes disposed on the resin housing. なお、発光ダイオード間には外来光からの光を吸収してコントラスト比を向上させ得るための西日対策パネルを配置させてある。 Incidentally, between the light emitting diodes are so arranged the setting sun protection panel for capable of improving the contrast ratio by absorbing light from the external light. 西日対策パネルには暗色系の黒色に着色した樹脂繊維を植毛加工させてある。 The afternoon sun protection panel are by flocking the resin fibers colored in black dark color. 発光ダイオードが配置された基板、西日対策パネルを樹脂筐体と透光性のケース内に配置すると共に固定してパッキンで封止することによりLEDユニットを構成する。 The substrate on which the light-emitting diodes are arranged, constituting the LED unit by sealing with packings and fixing with the afternoon sun protection panels placed in a plastic housing and the translucent case.

【0052】こうして形成されたLEDユニットをアルミの灯箱に収納することにより信号機を形成させた。 [0052] The LED unit formed in this way to form a traffic signal by accommodating the lamp box aluminum. 信号機の各発光ダイオードに電力を供給することにより上方向に光量を抑制しつつ正面高度が高く且つ、左右及び下方向に光量が多い信号機とすることができる。 Traffic each LED power and high front advanced while suppressing the amount of light in an upward direction by supplying to the can be a quantity of light in the lateral and downward direction is large traffic.

【0053】(実施例3)LEDチップを構成するIn [0053] (Example 3) an In constituting the LED chip
の組成を少なくして青色が発光可能な窒化物半導体からなる発光素子とすると共にLEDチップ上にセリウムで付活されたイットリウム・アルミニウム・ガーネット系蛍光体としてY 0.8 Gd 0.2 Al 512 :Ceが含有されたエポキシ樹脂をマウント・リードのカップ内に配置した以外は実施例1と同様にして発光ダイオードを構成させた。 Y 0.8 as yttrium-aluminum-garnet fluorescent material activated with cerium on the LED chip with the blue color light-emitting element comprising a light emitting capable nitride semiconductor with less composition of Gd 0.2 Al 5 O 12: Ce There except placing the epoxy resin contained in the mount in the lead cup was constituting the light-emitting diodes in the same manner as in example 1. 形成された発光ダイオードは実施例1とほぼ同様に中心光度が高く、左右及び下方向の半値角の広い発光ダイオードを構成することができた。 The formed light-emitting diode is substantially similar to high central luminous intensity in Example 1, it was possible to constitute a wide light-emitting diode of half angles of the right and left and downward. また、LEDチップからの青色光と共に蛍光体からの黄色光が発光され白色が観測された。 A white yellow light from the phosphor is light emission was observed with blue light from the LED chips.

【0054】 [0054]

【発明の効果】本発明は、モールド部材を特定形状とすることにより、不要な上方の光量を低減させる一方左右方向及び下方向において広視野角に発光可能な高輝度発光ダイオードとするものである。 According to the present invention, by the specific shape of the mold member, it is an capable of emitting high-luminance light emitting diodes in a wide viewing angle in one lateral direction and the downward direction to reduce the unnecessary upper amount . また、外来光からの反射の影響が少なく信号用に優れた発光ダイオードとすることができるものである。 Further, those which can be a light emitting diode having excellent for less signal influence of reflection from external light.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】図1は、発光観測面側から見た本発明の発光ダイオードを示す模式的正面図である。 [1] Figure 1 is a schematic front view showing a light-emitting diode of the present invention as viewed from the light emission observing surface side.

【図2】図2は本発明の発光特性を示す模式的断面図であり、図2(A)は図1のX−X方向の模式的説明図を示し、図2(B)は図1のY−Y方向の模式的説明図を示す。 Figure 2 is a schematic sectional view showing the light emission characteristics of the present invention, FIG. 2 (A) shows a schematic illustration of the X-X direction in FIG. 1, FIG. 2 (B) Figure 1 of a schematic illustration of the Y-Y direction.

【図3】図3は、本発明の発光ダイオードの正面からみた各構成部材の配置を表し図2のZ−Z方向の模式的横断面図を示す。 Figure 3 shows a schematic cross-sectional view of the Z-Z direction array of stands Figure 2 of the components as viewed from the front of the light emitting diode of the present invention.

【図4】図4は、本発明に用いられるカップに配置された発光素子の発光特性を示す模式的説明図であり、図4 Figure 4 is a schematic explanatory view showing the light emission characteristics of light emitting elements arranged in a cup used in the present invention, FIG. 4
(A)は模式的部分正面図、図4(B)は図4(A)のX−X断面図である。 (A) is schematic partial front view, FIG. 4 (B) is a sectional view taken along line X-X in FIG. 4 (A).

【図5】図5は、本発明の他の発光ダイオードを示し、 Figure 5 shows another light emitting diode of the present invention,
図5(A)は発光ダイオードの正面からみた各構成部材の配置を表した模式図であり、図5(B)は図5(A) Figure 5 (A) is a schematic diagram showing the arrangement of the components as viewed from the front of the light emitting diode, Fig. 5 (B) Figure 5 (A)
のX−X方向の模式的断面図を示し、図5(C)は図5 Shows a schematic cross-sectional view of the X-X direction, Fig. 5 (C) is 5
(A)のY−Y方向の模式的断面図を示す。 Shows a schematic cross-sectional view of the Y-Y direction (A).

【図6】図6(A)は、本発明の発光ダイオードの上下方向の配向特性を示し、図6(B)は、本発明の発光ダイオードの左右方向の配向特性を示す。 [6] 6 (A) shows the vertical orientation characteristics of the light emitting diode of the present invention, FIG. 6 (B) shows the orientation characteristics in the lateral direction of the light emitting diode of the present invention.

【図7】図7は、本発明と比較のために示す発光ダイオードの模式図であり、図7(A)は、発光ダイオードの正面からみた各構成部材の配置を表した模式図であり、 Figure 7 is a schematic view of a light emitting diode shown for comparison with the present invention, FIG. 7 (A) is a schematic diagram showing the arrangement of the components as viewed from the front of the light-emitting diodes,
図7(B)は図7(A)のX−X方向の模式的断面図を示し、図7(C)は図7(A)のY−Y方向の模式的断面図を示す。 Figure 7 (B) shows a schematic cross-sectional view of the X-X direction of FIG. 7 (A), FIG. 7 (C) shows a schematic cross-sectional view of the Y-Y direction in FIG. 7 (A).

【符号の説明】 DESCRIPTION OF SYMBOLS

101、501・・・モールド部材 102、502・・・発光素子 103、104、503、504・・・リード端子 105、505・・・電気的接続部材 201・・・透光性モールド部材の先端 202・・・第1の曲率半径の端部 203・・・第2の曲率半径の端部 204・・・第3の曲率半径の端部 205・・・第4の曲率半径の端部 401・・・サファイア基板 402・・・バッファ層 403・・・n型コンタクト層 404・・・活性層 405・・・p型クラッド層 406・・・p型コンタクト層 407・・・全面電極 408・・・パッド電極 409・・・n型電極 410・・・カップの内壁 101 and 501 ... sealing member 102,502 ... light emitting element 103,104,503,504 tip of ... lead terminals 105,505 ... electrically connecting members 201 ... translucent mold member 202 ... first radius of curvature of the end portion 203 ... second radius of curvature of the end portion 204 ... third radius of curvature of the end portion 205 ... fourth radius of curvature of the end portion 401 .. sapphire substrates 402 ... buffer layer 403, ... n-type contact layer 404 ... the active layer 405 ... p-type cladding layer 406 ... p-type contact layer 407 ... the whole surface electrode 408 ... pad the inner wall of the electrode 409 · n-type electrode 410 ... cup

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 少なくとも2つのリード端子(103)(104) 1. A least two lead terminals (103) (104)
    と電気的に接続された発光素子(102)と、該発光素子(10 And electrically connected to the light emitting element (102), the light emitting element (10
    2)を封止し先端(201)が凸状の光学レンズとなる透光性モールド部材(101)とを有する発光ダイオードであって、 前記先端(201)を通る光軸を含む透光性モールド部材(10 2) a light-emitting diode sealed tip (201) has a light-transmitting mold member comprising a convex optical lens (101), translucent mold including an optical axis passing through said tip (201) member (10
    1)の断面を構成する先端(201)から端部(202)までの第1 First from the tip (201) to the end portion (202) constituting the cross section of 1)
    の曲率半径及び先端(201)から他方の端部(203)までの第2の曲率半径と、光軸を含む前記断面と垂直をなす断面を構成する先端(201)から端部(204)までの第3の曲率半径及び先端(201)から他方の端部(205)までの第4の曲率半径が、それぞれ次の関係を満たすことを特徴とする発光ダイオード。 A second radius of curvature from the curvature radius and the distal end (201) to the other end (203) of the tip constituting a section forming the cross-section perpendicular containing the optical axis (201) to the edge (204) the third radius of curvature and the tip the other end from the (201) (205) to the fourth radius of curvature of the light-emitting diode, respectively, and satisfy the following relationships. 第1の曲率半径の大きさ<第3の曲率半径の大きさ及び第4の曲率半径の大きさ≦第2の曲率半径の大きさ Size <size and size ≦ magnitude of the second radius of curvature of the fourth radius of curvature of the third radius of curvature of the first curvature radius
  2. 【請求項2】 第3の曲率半径の大きさと第4の曲率半径の大きさが略等しい請求項1記載の発光ダイオード。 2. A third radius of curvature of the size and the fourth radius of curvature magnitude is substantially equal to Claim 1, wherein the light emitting diode.
  3. 【請求項3】 光軸上の発光観測面側から見て第3及び第4の曲率半径を構成する断面と、前記リード端子間(1 3. A cross-section which constitute the third and fourth radius of curvature as viewed from the light emission observing surface side of the optical axis, between the lead terminals (1
    03)、(104)の配置方向とが略平行である請求項1記載の発光ダイオード。 03), (104) according to claim 1, wherein the light emitting diode and orientation are substantially parallel.
  4. 【請求項4】 前記リード端子(103)は発光素子(102)からの光を反射するカップ(410)を有すると共に該カップ Wherein said the cup with the lead terminal (103) has a cup (410) for reflecting light from the light emitting element (102)
    (401)内に光軸上の発光観測面側から見て、透光性モールド部材(101)の第2の曲率半径、第3の曲率半径及び第4の曲率半径側よりも第1の曲率半径側の発光出力が高く配置させた発光素子(102)を有する請求項1記載の発光ダイオード。 (401) as viewed from the light emission observing surface side of the optical axis within the second radius of curvature, the first curvature than the third radius of curvature and the fourth radius of curvature side of the translucent mold member (101) claim 1, wherein the light emitting diode having a light emitting element emitting an output radius side was disposed higher (102).
  5. 【請求項5】 少なくとも2つのリード端子と電気的に接続された発光素子と、該発光素子を封止し先端が凸状の光学レンズとなる透光性モールド部材とを有する発光ダイオードを複数配置させた信号機であって、 前記発光ダイオードは先端を通る光軸を含む透光性モールド部材の断面を構成する先端から端部までの第1の曲率半径及び先端から他方の端部までの第2の曲率半径と、光軸を含む前記断面と垂直をなす断面を構成する先端から端部までの第3の曲率半径及び先端から他方の端部までの第4の曲率半径がそれぞれ第1の曲率半径の大きさ<第3の曲率半径の大きさ、第4の曲率半径の大きさ≦第2の曲率半径の大きさの関係を満たすと共に各発光ダイオードを同一方向に配置したことを特徴とする信号機。 5. A least two lead terminals electrically connected to the light emitting element, arranging a plurality of light-emitting diode tip sealing the light emitting element and a light-transmitting mold member comprising a convex optical lens a traffic signal obtained by the light emitting diode and the second from the first radius of curvature and the tip of the tip constituting the cross section of the translucent mold member including an optical axis passing through the tip to the end portion to the other end the curvature radius of the cross section and the fourth curvature radius of curvature first respective from the tip constituting a cross-section perpendicular from the third radius of curvature and the tip to the end to the other end portion including the optical axis radius size <third curvature radius of magnitude, characterized in that the light emitting diodes arranged in the same direction fulfills a fourth radius of curvature of the magnitude ≦ second radius of curvature of the magnitude of the relationship traffic lights.
JP26702798A 1997-09-22 1998-09-21 Signal light-emitting diode and traffic using the same Expired - Fee Related JP2980121B2 (en)

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