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JPS62108585A - light emitting diode lamp - Google Patents

light emitting diode lamp

Info

Publication number
JPS62108585A
JPS62108585AJP60248479AJP24847985AJPS62108585AJP S62108585 AJPS62108585 AJP S62108585AJP 60248479 AJP60248479 AJP 60248479AJP 24847985 AJP24847985 AJP 24847985AJP S62108585 AJPS62108585 AJP S62108585A
Authority
JP
Japan
Prior art keywords
light
emitting diode
light emitting
lens
front lens
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.)
Granted
Application number
JP60248479A
Other languages
Japanese (ja)
Other versions
JPH0439236B2 (en
Inventor
Akihiro Iwaki
井脇 明洋
Masami Tajima
田島 政美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co LtdfiledCriticalStanley Electric Co Ltd
Priority to JP60248479ApriorityCriticalpatent/JPS62108585A/en
Publication of JPS62108585ApublicationCriticalpatent/JPS62108585A/en
Publication of JPH0439236B2publicationCriticalpatent/JPH0439236B2/ja
Grantedlegal-statusCriticalCurrent

Links

Classifications

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Abstract

PURPOSE:To remove emission nonuniformity on the surface of a front lens by mounting an inner lens synthetically taking a convex shape at a position between the front lens and a light-emitting diode and forming the light-emitting surface side of the light-emitting diode in a spherical resin mold centering around a chip. CONSTITUTION:An inner lens 4 formed to a convex lens through a cutting method for a Fresnel lens is fitted between a light-emitting diode 1 and a front lens 3 so as to be made optically the same as the axis of the front light-emitting diode 1, and beams radiated from the light-emitting diode 1 converted into parallel beams. The light-emitting diode 1 is molded with a transparent resin such as an epoxy rein so that a chip is positioned at the center of a spherical center, and radiated beams are not given directivity. Accordingly, emission nonuniformity on the surface of the front lens is removed, and the total number of the light-emitting diodes used is minimized.

Description

Translated fromJapanese

【発明の詳細な説明】[産業上の利用分野]本発明は交通機関の信号灯光、例えば信号器の灯具や、
自動車の尾灯などを一層の信頼性の向上を目的として、
固体光源である発光ダイオードを光源とするときに、発
生しがちである発光面の発光むらを改善するものである
[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to traffic signal lights, such as traffic light lights,
With the aim of further improving the reliability of automobile taillights, etc.
This is intended to improve the uneven light emission on the light emitting surface that tends to occur when a light source, which is a solid state light source, is used as a light source.

[従来の技術]従来この種の第4図に示したような発光ダイオード灯具
に発光光源として使用する発光ダイオードは指向性が鋭
く狭いものであるので、どのように前面レンズ3のレン
ズカットを工夫しても前記前面レンズ3の全面を均一に
発光させることが困難であり、この解決の方法としては
、第4図に示すように、前記発光ダイオードIをプリン
ト基板2に物理的に可能なかぎり近接して配設して前記
前面レンズ3の面における発光むらを低減することが唯
一の解決手段であった。
[Prior Art] Since the light emitting diode used as the light source in this type of light emitting diode lamp as shown in FIG. 4 has a sharp and narrow directivity, how can the lens cut of the front lens 3 be devised? Even if the front lens 3 The only solution was to reduce the unevenness of light emission on the surface of the front lens 3 by arranging them close to each other.

[発明が解決しようとする問題点]しかしながら、従来の技術においての前面レンズの而で
の発光むらの解決方法では、第一に、前記発光むらは、
前記で説明した物理的に可能なかぎりに近接して配設し
ただけでは未だ解決するのに充分とは言えないものであ
り、これは前記発光ダイオードが光軸上に光が集中して
いる事から生じる問題点である。 第二は、上記のよう
に発光ダイオードを近接して配設することは、発熱の問
題点を生じるものであり、放熱板などの放熱手段を必要
とすると共に、特に中心部の発光ダイオードは前記発熱
の集中によって、熱破壊を生じる危険性が大変に高くな
るものである、このことは同一の発光ダイオードによる
光源を使用しているにも拘わらず、その周辺部に配設さ
れたものと、中心部に配設されたものでは信頼性に差を
生じるという品質保障上の問題点を生じ、更には、灯具
の中心部はど高熱になるので、前記発光ダイオードに熱
による発光効率の差を生じて、中心部はど暗くなり、前
記灯具に前記で説明した発光ダイオードの鋭い指向性に
原因する発光むらと別に、大きな範囲での発光むらも合
わせて生じるという新たな問題点も生じ。 第三には発
光むらを解決するために、例えば本来必要とする照度を
確保するための発光ダイオードの数以上にその数を使用
しなければならない経済効率上の問題点、及び、それに
よる消費電力の必要以上の増加という問題点を生じるも
のである。
[Problems to be Solved by the Invention] However, in the conventional technique for solving the uneven light emission at the front lens, firstly, the uneven light emission is caused by
Simply arranging the light emitting diodes as close together as physically possible as explained above is still not enough to solve the problem, and this is because the light of the light emitting diodes is concentrated on the optical axis. This is a problem arising from. Second, arranging the light emitting diodes in close proximity as described above causes the problem of heat generation, which requires a heat dissipation means such as a heat sink, and especially when the light emitting diodes in the center are The risk of thermal damage due to the concentration of heat is extremely high.This is because even though the light source is the same light emitting diode, it is placed in the vicinity of the light source. If the light emitting diode is placed in the center, there will be a quality assurance problem in that there will be a difference in reliability.Furthermore, since the center of the lamp gets very hot, it is necessary to prevent the difference in luminous efficiency of the light emitting diode due to heat. As a result, the center becomes dark, and a new problem arises in that, in addition to the uneven light emission caused by the sharp directivity of the light emitting diode in the lamp described above, uneven light emission also occurs over a large range. Thirdly, in order to solve uneven light emission, for example, there is a problem in terms of economic efficiency in which the number of light emitting diodes must be used in excess of the number required to secure the originally required illuminance, and the resulting power consumption. This results in the problem of an unnecessarily increased amount of

[問題点を解決するための手段]本発明は前記した問題点を解決するための具体的な手段
として配光特性を定めるための前面レンズと、光源であ
る一個以上の発光ダイオードを有する発光ダイオード灯
具において、 前記前面レンズと前記発光ダイオードの
中間の位置に前記発光ダイオードの光軸と光学的に同軸
に設けた、例えばフレネルカットなどの凸レンズカット
によって総合的には凸であるインナーレンズがあり、前
記発光ダイオードの発光面側がチップを中心とする球面
状の樹脂モールドとしてあることを特徴とする発光ダイ
オード灯具を提供することによって、必要最小限の発光
ダイオードの数においても前記前面レンズの面における
発光むらを無くして、上記の従来の問題点を解決するも
のである。
[Means for Solving the Problems] The present invention provides a light emitting diode having a front lens for determining light distribution characteristics and one or more light emitting diodes as a light source as a specific means for solving the above problems. In the lamp, there is an inner lens which is provided at an intermediate position between the front lens and the light emitting diode and is optically coaxial with the optical axis of the light emitting diode, and is generally convex due to a convex lens cut such as a Fresnel cut, By providing a light emitting diode lamp characterized in that the light emitting surface side of the light emitting diode is formed as a spherical resin mold with a chip at the center, light emission on the surface of the front lens can be achieved even when the number of light emitting diodes is the minimum required. This eliminates unevenness and solves the above-mentioned conventional problems.

[実 施 例]次に、本発明を図に示す実施例に基づいて詳細に説明す
る。 尚、理解を容易にするために、従来例と同じ部分
には同じ符号を付けて説明する。
[Example] Next, the present invention will be described in detail based on an example shown in the drawings. In order to facilitate understanding, the same parts as in the conventional example will be described with the same reference numerals.

第1図に示すものは、光源である発光ダイオードが一個
のときの実施例であり、本発明の最も基本的なものであ
る。 従来例と同様に発光ダイオードlがプリント基板
2にとりつけられて、その前面側には前面レンズ3が設
けられているが、前記発光ダイオードlと前記前面レン
ズ3の中間には、前面発光ダイオード1と光学的に同軸
となるように、フレネルレンズなどと称されているレン
ズカットの方法によって凸レンズに形成されているイン
ナーレンズ4が設けられている、この時の前記インナー
レンズ4の配設の位置は前記発光ダイオード1からの放
射される光が、前記前面レンズ3の有効面を充分に覆う
まで拡散される位置であり、作用は前記した発光ダイオ
ード1からの放射される光を平行光線とするものである
。 更に、前記発光ダイオードlはチップが球面の中心
となるように透明な、例えばエポキシ樹脂でモールドさ
れたものであり、それによって前記発光ダイオードは放
射する光に指向性を持たないものとなっている。
What is shown in FIG. 1 is an embodiment in which only one light emitting diode is used as a light source, and is the most basic embodiment of the present invention. As in the conventional example, a light emitting diode 1 is attached to a printed circuit board 2, and a front lens 3 is provided on the front side thereof. The inner lens 4 is formed into a convex lens by a lens cutting method called a Fresnel lens so that it is optically coaxial with the inner lens 4. is a position where the light emitted from the light emitting diode 1 is diffused until it sufficiently covers the effective surface of the front lens 3, and its action is to convert the light emitted from the light emitting diode 1 into parallel light beams. It is something. Further, the light emitting diode l is molded with a transparent material, for example, epoxy resin, so that the chip is at the center of the spherical surface, so that the light emitted from the light emitting diode has no directivity. .

第2図は前記発光ダイオードIを更に詳細に示ずもので
あって、半導体による発光ダイオードのチップlaはリ
ードフレーム1bにマウントされた後に、防湿と光学的
な効果を兼ねて、透明なエポキシ樹脂1cなどでモール
ドされるが、この時に前面側、すなわち発光側は前記チ
ップを中心とする球面に仕上げられて発光の指向性を無
いものとされる。
FIG. 2 shows the light emitting diode I in more detail, and the semiconductor light emitting diode chip la is mounted on a lead frame 1b and then covered with transparent epoxy resin for both moisture proofing and optical effects. 1c, etc., and at this time, the front side, that is, the light emitting side, is finished into a spherical surface centered on the chip, so that there is no directivity of light emission.

第3図は本発明を光源である発光ダイオードを複数個使
用した灯具に実施した例であり、図面が複雑化するのを
避けるために一個のエレメントに付いて図示したもので
ある。 この複数の場合には、まず前記灯具に要求され
る照度から必要な前記発光ダイオードlの数が決定され
一個の前記発光ダイオードIの受は持つ範囲が定められ
る。
FIG. 3 shows an example in which the present invention is implemented in a lamp using a plurality of light emitting diodes as light sources, and is illustrated as one element to avoid complicating the drawing. In this case, the number of light emitting diodes I required is first determined based on the illuminance required for the lamp, and the range of one light emitting diode I is determined.

これは前記発光ダイオードIの有効光束を必要照度で除
することで容易に計算出来るものであり、この計算に従
って前記発光ダイオードの必要な数及び配設する間隔を
決定することが出来る。 以上の方法で決定した数と間
隔で前記発光ダイオード1がプリント基板2上に配設さ
れ、該発光ダイオードlの光軸上にインナーレンズ5が
設けられるが、該インナーレンズ5の一つのエレメント
5aも前記発光ダイオード1の数と間隔に対応していて
光学的にも同軸である。 以上に説明したエレメントが
必要数だけ繰り返されることでインナーレンズ5が形成
され、同様に全体の発光ダイオード灯具も形成される。
This can be easily calculated by dividing the effective luminous flux of the light emitting diode I by the required illuminance, and according to this calculation, the required number of light emitting diodes and the spacing between them can be determined. The light emitting diodes 1 are arranged on the printed circuit board 2 at the number and interval determined by the above method, and the inner lens 5 is provided on the optical axis of the light emitting diodes 1. One element 5a of the inner lens 5 also correspond to the number and spacing of the light emitting diodes 1, and are optically coaxial. The inner lens 5 is formed by repeating the elements described above as many times as necessary, and the entire light emitting diode lamp is similarly formed.

[作 用]本発明により、光源である発光ダイオードの発する光の
放射角を広げるために、該発光ダイオードの樹脂ケース
を半導体チップを中心とする球面状のモールドとすると
共に、前記発光ダイオードと前面レンズの中間の適宜な
位置にインナーレンズを設けた事によって、前記発光ダ
イオードの光を放射する角度を広くすると共に、前記イ
ンナーレンズで平行光線として前記前面レンズに入射す
るものとなり、例えば電球と反射鏡を使用した灯具と同
程度に前記前面レンズ面における発光むらを無くするも
のである。
[Function] According to the present invention, in order to widen the radiation angle of light emitted by the light emitting diode as a light source, the resin case of the light emitting diode is made into a spherical mold with the semiconductor chip in the center, and the light emitting diode and the front surface are By providing an inner lens at an appropriate position in the middle of the lens, the angle at which the light emitted from the light emitting diode is emitted is widened, and the light enters the front lens as parallel light through the inner lens. This eliminates uneven light emission on the front lens surface to the same extent as a lamp using a mirror.

[発明の効果]以上に詳細に説明したように、本発明によって光源であ
る発光ダイオードを半導体のチップを中心とする球面状
の樹脂モールドのものとして、更に前記発光ダイオード
と前面レンズの中間の適宜の位置にインナーレンズを設
けたことによって、前記前面レンズの面における発光む
らをないものとすると共に、使用する発光ダイオードの
全体の数も最低限の数とすることを合わせて可能とし、
また、灯具が前記発光ダイオードの近接によって高温と
なり前記発光ダイオードの寿命を短くして、信頼性に問
題を生じていた点も解決し。 更には、消費電力も適正
なものにするなど、実用性の面でも、信頼性の面でも優
れた効を奏するものである。
[Effects of the Invention] As explained in detail above, according to the present invention, the light source, which is a light emitting diode, is made of a spherical resin mold with a semiconductor chip as the center, and furthermore, the light emitting diode, which is a light source, is made of a spherical resin mold with a semiconductor chip as the center, and furthermore, a light emitting diode is formed as a light emitting diode, which is a light source, in a spherical resin molded type with a semiconductor chip as the center. By providing the inner lens at the position, it is possible to eliminate uneven light emission on the surface of the front lens, and also to minimize the total number of light emitting diodes used,
Furthermore, the problem of the lamp becoming hot due to the proximity of the light emitting diode, shortening the life of the light emitting diode and causing reliability problems, is also solved. Furthermore, it has excellent effects in terms of practicality and reliability, such as by optimizing power consumption.

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

第1図は本発明に係る発光ダイオード灯具の一実施例を
しめず断面図、第2図は第1図の発光ダイオードの部分
を拡大して示す説明図、第3図は本発明の別の実施例を
要部で示す断面図、第4図は従来例を示す断面図である
。■・・・・発光ダイオード  2・・・・プリント基板
3・・・・前面レンズ4.5・・・・インナーレンズ
FIG. 1 is a cross-sectional view of one embodiment of a light-emitting diode lamp according to the present invention, FIG. 2 is an explanatory diagram showing an enlarged portion of the light-emitting diode in FIG. 1, and FIG. FIG. 4 is a sectional view showing a main part of the embodiment, and FIG. 4 is a sectional view showing a conventional example. ■... Light emitting diode 2... Printed circuit board 3... Front lens 4.5... Inner lens

Claims (1)

Translated fromJapanese
【特許請求の範囲】[Claims]配光特性を定めるための前面レンズと、光源である一個
以上の発光ダイオードを有する発光ダイオード灯具にお
いて、前記前面レンズと前記発光ダイオードの中間の位
置に、前記発光ダイオードの光軸と光学的に同軸に設け
た、例えばフレネルカットなどの凸レンズカットによっ
て総合的には凸であるインナーレンズがあり、前記発光
ダイオードの発光面側がチップを中心とする球面状の樹
脂モールドとしてあることを特徴とする発光ダイオード
灯具。
In a light emitting diode lamp having a front lens for determining light distribution characteristics and one or more light emitting diodes serving as a light source, a light emitting diode lamp is provided at a position intermediate between the front lens and the light emitting diode and is optically coaxial with the optical axis of the light emitting diode. A light-emitting diode, characterized in that there is an inner lens which is generally convex due to a convex lens cut such as a Fresnel cut, and the light-emitting surface side of the light-emitting diode is formed as a spherical resin mold with the chip at the center. Light equipment.
JP60248479A1985-11-061985-11-06 light emitting diode lampGrantedJPS62108585A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP60248479AJPS62108585A (en)1985-11-061985-11-06 light emitting diode lamp

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP60248479AJPS62108585A (en)1985-11-061985-11-06 light emitting diode lamp

Publications (2)

Publication NumberPublication Date
JPS62108585Atrue JPS62108585A (en)1987-05-19
JPH0439236B2 JPH0439236B2 (en)1992-06-26

Family

ID=17178762

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP60248479AGrantedJPS62108585A (en)1985-11-061985-11-06 light emitting diode lamp

Country Status (1)

CountryLink
JP (1)JPS62108585A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02206000A (en)*1989-02-031990-08-15Koito Ind Ltd signal light
JPH0722405U (en)*1993-01-121995-04-21株式会社ベンハー Vehicle lights
JPH0722406U (en)*1993-01-121995-04-21株式会社ベンハー Vehicle lights
EP1360713A4 (en)*2001-01-102006-11-15Silverbrook Res Pty Ltd LUMINESCENT SEMICONDUCTOR HOUSING
JP2012142410A (en)*2010-12-282012-07-26Rohm Co LtdLight emitting element unit and method for manufacturing the same, light emitting element package, and lighting system
JP2015159311A (en)*2015-04-082015-09-03ローム株式会社semiconductor device

Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS61206104A (en)*1985-03-111986-09-12株式会社小糸製作所Lamp apparatus for vehicle
JPS6294440A (en)*1985-10-211987-04-30Koito Mfg Co LtdLighting fixture for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS61206104A (en)*1985-03-111986-09-12株式会社小糸製作所Lamp apparatus for vehicle
JPS6294440A (en)*1985-10-211987-04-30Koito Mfg Co LtdLighting fixture for vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02206000A (en)*1989-02-031990-08-15Koito Ind Ltd signal light
JPH0722405U (en)*1993-01-121995-04-21株式会社ベンハー Vehicle lights
JPH0722406U (en)*1993-01-121995-04-21株式会社ベンハー Vehicle lights
EP1360713A4 (en)*2001-01-102006-11-15Silverbrook Res Pty Ltd LUMINESCENT SEMICONDUCTOR HOUSING
JP2012142410A (en)*2010-12-282012-07-26Rohm Co LtdLight emitting element unit and method for manufacturing the same, light emitting element package, and lighting system
US9082945B2 (en)2010-12-282015-07-14Rohm Co., Ltd.Light emitting element unit and method for manufacturing the same, light emitting element package and illuminating device
US9997682B2 (en)2010-12-282018-06-12Rohm Co., Ltd.Light emitting element unit and method for manufacturing the same, light emitting element package and illuminating device
JP2015159311A (en)*2015-04-082015-09-03ローム株式会社semiconductor device

Also Published As

Publication numberPublication date
JPH0439236B2 (en)1992-06-26

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