JPH11346003A - Light emitting diode - Google Patents

Light emitting diode

Info

Publication number
JPH11346003A
JPH11346003A JP10151260A JP15126098A JPH11346003A JP H11346003 A JPH11346003 A JP H11346003A JP 10151260 A JP10151260 A JP 10151260A JP 15126098 A JP15126098 A JP 15126098A JP H11346003 A JPH11346003 A JP H11346003A
Authority
JP
Japan
Prior art keywords
light
light emitting
emitting diode
optical axis
led
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10151260A
Other languages
Japanese (ja)
Inventor
Tetsuji Matsui
哲司 松井
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.)
ADOBANET KK
Original Assignee
ADOBANET KK
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 ADOBANET KK filed Critical ADOBANET KK
Priority to JP10151260A priority Critical patent/JPH11346003A/en
Publication of JPH11346003A publication Critical patent/JPH11346003A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52Encapsulations
    • H01L33/54Encapsulations having a particular shape

Landscapes

  • Led Device Packages (AREA)

Abstract

PROBLEM TO BE SOLVED: To enable realizing high density arrangement where a large number of light receiving members are arranged, by using constitution where tip parts of the light receiving members are made spherical, shapes viewed from an optical axis direction are made hexagonal, and flanges are excluded. SOLUTION: A light receiving member 4 has structure where the shape viewed from the direction of an optical axis X is made hexagonal, the tip part is made spherical and formed of transparent epoxy resin, preferably, and flanges are not used. Since flange parts which are used for auxiliary positioning at the time of attaching light emitting diodes are excluded, interval between the light emitting diodes can be reduced, and mounting of high density is enabled.

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、光を光軸に沿って
照射するチップと、このチップから照射される光を集光
する集光部材とを備えた発光ダイオードに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode having a chip for irradiating light along an optical axis and a light condensing member for condensing light emitted from the chip.

【0002】[0002]

【従来の技術】かかる従来技術に関する発光ダイオード
(以下、LEDということがある。)は図6に示され
る。(a)は平面図、(b)は背面図である。LED1
はカソード端子2と、アノード端子3と、集光部材4
と、フランジ部5とを備えている。チップは図示されて
いないが、集光部材の内部に設けられている。LEDは
従来から表示用によく用いられるものであるが、発光効
率の向上から照明用としての用途にも拡大されて用いら
れてきている。ある物体に対して照明を行う場合には、
透明なレンズあるいは透明なパッケージとして構成され
る集光部材4により、照射の指向性を比較的狭い範囲に
絞って照射対象に光束が集中するようにしている。
2. Description of the Related Art Light emitting diodes according to the prior art.
(Hereinafter, may be referred to as an LED) is shown in FIG. (A) is a plan view and (b) is a rear view. LED1
Denotes a cathode terminal 2, an anode terminal 3, and a light condensing member 4.
And a flange portion 5. Although not shown, the chip is provided inside the light collecting member. Conventionally, LEDs are often used for display. However, LEDs have been used for lighting because of their improved luminous efficiency. When lighting an object,
The light-collecting member 4 configured as a transparent lens or a transparent package narrows the directivity of irradiation to a relatively narrow range so that the light flux is concentrated on the irradiation target.

【0003】照明としての性能を向上させるためには、
単位面積当たりの発光量を増やす必要があり、集光部材
4を光軸方向X(カソード端子2又はアノード端子3と
平行である。)から見た形状を円形にし(図6 (b) 参
照) 、チップから放射される光を効率よく集められるよ
うにしている。
In order to improve the performance as lighting,
It is necessary to increase the amount of light emission per unit area, and the shape of the light-collecting member 4 as viewed from the optical axis direction X (parallel to the cathode terminal 2 or the anode terminal 3) is circular (see FIG. 6B). The light emitted from the chip can be efficiently collected.

【0004】このLEDを照明として用いるために図7
に示すように多数個を密着して配置する。
In order to use this LED as illumination, FIG.
As shown in FIG.

【0005】[0005]

【発明が解決しようとする課題】上記従来技術の問題点
は、実際にチップから出た光を集光するレンズとして機
能しているのは、中央付近の円形部分 (図7の斜線を引
いたA部)のみであり、それ以外の部分は光を出さない
部分が多く存在し、単位面積当たりの光量を増加させる
障害となっている。さらに、フランジ部5を設けた場合
には、このフランジ部5も集光にはまったく寄与してい
ないため更に光量増加の障害になってしまう。
The problem with the prior art described above is that the lens actually condensing the light emitted from the chip is a circular portion near the center (the hatched portion in FIG. 7). A) is the only part, and many other parts do not emit light, which is an obstacle to increase the amount of light per unit area. Further, when the flange portion 5 is provided, the flange portion 5 also does not contribute to the light collection at all, which further hinders an increase in the amount of light.

【0006】そこで、本発明の目的は、照明用としてL
EDを用いる場合に単位面積当たりの光量を従来技術に
比べ増加することのできる発光ダイオードを提供するこ
とである。
Accordingly, an object of the present invention is to provide an L
An object of the present invention is to provide a light emitting diode that can increase the amount of light per unit area when using an ED as compared with the related art.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
本発明に係る発光ダイオードは、光を光軸に沿って照射
するチップと、このチップから照射される光を集光する
集光部材とを備え、この集光部材の前記光軸方向から見
た形状を正多角形にしたことを特徴とするものである。
In order to achieve the above object, a light emitting diode according to the present invention comprises a chip for irradiating light along an optical axis, a light condensing member for condensing light emitted from this chip. Wherein the shape of the light collecting member viewed from the optical axis direction is a regular polygon.

【0008】正多角形にしたので、これを多数個ならべ
て配置すると円形のものよりも高密度に配置することが
できるので、単位面積当たりの光量を従来技術に比べて
増加させることができる。
Since a regular polygon is formed, a large number of such polygons can be arranged more densely than a circular one, so that the amount of light per unit area can be increased as compared with the prior art.

【0009】前記正多角形としては、正三角形、正方
形、正六角形等があげられるが、正六角形が発光効率を
犠牲にせずに配置することができるので好ましい。
Examples of the regular polygon include a regular triangle, a square, a regular hexagon, and the like. A regular hexagon is preferable because it can be arranged without sacrificing the luminous efficiency.

【0010】さらに、発光ダイオードが赤外光用である
ならば、前記照射される光の中心波長は730nm〜8
40nmの間に位置することが好ましい。理由は実施形
態の説明にて後述する。
Further, if the light emitting diode is for infrared light, the center wavelength of the irradiated light is 730 nm to 8 nm.
It is preferably located between 40 nm. The reason will be described later in the description of the embodiment.

【0011】[0011]

【発明の実施の形態】図1は本実施形態に係るLED1
の外観形状を示し、(a)は平面図、(b)は背面図で
ある。従来技術と異なるのは、集光部材4を光軸Xの方
向から見た形状を正六角形にしていることと、フランジ
が設けられていないことである。この六角形の大きさは
従来技術の図5の集光部材4を光軸X方向から見た円形
形状が内接する大きさとする。集光部材4の先端部は球
状に形成されている。集光部材4は好ましくは透明のエ
ポキシ樹脂で形成される。上記円形形状はチップから放
射される光束の大半が通過する領域であり、有効径と称
されるものである。図2はこのLED1を高密度にハニ
カム状に配置したものである。フランジ部といった集光
に寄与しない部分は、LEDの取り付け時の位置決めに
補助的に用いられるものであるが、このフランジ部をな
くすことでLED同士の間隔を詰めることができ、高密
度の実装を行うことができる。なお、六角形内の領域で
有効径の外側の領域についてもわずかながら照射効率の
向上に寄与する。
FIG. 1 shows an LED 1 according to this embodiment.
(A) is a plan view and (b) is a rear view. The difference from the prior art is that the shape of the light condensing member 4 as viewed from the direction of the optical axis X is a regular hexagon and that no flange is provided. The size of the hexagon is such that the circular shape of the condensing member 4 of FIG. 5 of the related art viewed from the optical axis X direction is inscribed. The tip of the light condensing member 4 is formed in a spherical shape. The light collecting member 4 is preferably formed of a transparent epoxy resin. The circular shape is a region through which most of the light flux emitted from the chip passes, and is called an effective diameter. FIG. 2 shows the LEDs 1 arranged at high density in a honeycomb shape. The parts that do not contribute to light collection, such as the flange part, are used to assist in the positioning of the LED when it is mounted. It can be carried out. It should be noted that the area inside the hexagon and outside the effective diameter also slightly contributes to the improvement of the irradiation efficiency.

【0012】次に本実施形態のLEDにより従来技術
(フランジあり)に比べてどれだけの光量増加が得られ
るのかを計算する。具体的な寸法は、従来技術では集光
部材4直径5mm、本実施形態では六角形の相対抗する
辺と辺の距離が4mmとする。多数個のLEDを配置す
るときのクリアランスを0.2mm確保するとして、1
00×100mmに実装できる数量は、 従来技術の円形の場合:314個 本実施形態の六角形の場合:585個 となり、86%多く実装できたことになる。形状の違い
によるLED1個当たりの光量低下が最大でも5%であ
ると見込むと、光量増加は最低でも、 86×0.95=81% となり、約8割の光量増加ができたことになりかなりの
改善が見られた。
Next, it is calculated how much light amount can be obtained by the LED of this embodiment as compared with the prior art (with a flange). The specific dimensions are 5 mm in diameter of the light-condensing member 4 in the related art, and the distance between opposing sides of the hexagon is 4 mm in the present embodiment. Assuming that a clearance of 0.2 mm is secured when arranging a large number of LEDs, 1
The number that can be mounted on 00 × 100 mm is 314 in the case of the conventional circular shape, and 585 in the case of the hexagonal shape of the present embodiment, which means that 86% more mounting is possible. Assuming that the maximum reduction in the amount of light per LED due to the difference in the shape is 5% at the maximum, the increase in the amount of light is at least 86 × 0.95 = 81%. Improvement was seen.

【0013】<照明装置への応用>上記LEDを用いた
照明装置の用途の1例は、駐車場で用いるものでナンバ
ープレートにLEDからの光を照射し、この反射光をC
CDカメラで受けてナンバーを検出し、契約車か否かを
判定するために用いるものがあげられる。照明装置の発
する光の波長はLEDの素子で決まるものであり、可視
光から近赤外線領域まで作られているLEDの場合には
種々の波長の照明装置を作ることが可能である。
<Application to Lighting Apparatus> One example of an application of the above-mentioned lighting apparatus using the LED is that used in a parking lot, which irradiates a license plate with light from the LED and reflects this reflected light to C.
One that is used to detect a number received by a CD camera and determine whether or not it is a contract car is used. The wavelength of the light emitted by the lighting device is determined by the elements of the LED. In the case of LEDs made from visible light to near-infrared light, it is possible to make lighting devices of various wavelengths.

【0014】上記のようなナンバープレートの検出など
では、ドライバーに眩しさを与えないようにしたり、気
づかれないようにするためには近赤外光を使用すること
が好ましい。検出用のCCDカメラとしては白黒CCD
カメラでよい。
In the detection of a license plate as described above, it is preferable to use near-infrared light in order to prevent the driver from being dazzled or not noticed. Monochrome CCD as CCD camera for detection
A camera is fine.

【0015】図3は720nmにピークを有するLED
と代表的なCCDカメラの感度とを対比させたものであ
り、斜線を引いた部分は可視光の領域であり、このよう
なLEDを用いて照明装置を構成すると人には眩しく感
じるのでナンバープレートの検出用としては好ましくな
い。
FIG. 3 shows an LED having a peak at 720 nm.
And the sensitivity of a typical CCD camera. The shaded area is the visible light area. If such a LED is used to construct a lighting device, it will be dazzling to humans. It is not preferable for the detection.

【0016】図4は850nmにピークを有するLED
の場合であるが、LEDは可視光を照射しないので人に
眩しさを感じさせないが、CCDカメラの感度が低くな
ってしまうため好ましくない。
FIG. 4 shows an LED having a peak at 850 nm.
In this case, the LED does not emit visible light and does not cause dazzling to humans, but is not preferable because the sensitivity of the CCD camera is reduced.

【0017】したがって、LEDの中心波長としては7
30〜840nmの間に位置するのが好ましく、特に中
心波長を780nmとすれば図5に示されるように、C
CDカメラの感度低下の点と可視光領域への発光光量に
ついてちょうどバランスがとれたものとなる。780n
mの光は人間の目には見えないが、図5に示されるよう
に発光スペクトルは広がっており、多少700nm以下
の可視光領域にも発光スペクトルが存在する。したがっ
て、可視光カットフィルターをCCDカメラの入力部に
設けてもよいが、可視光領域の発光量はごくわずかであ
るので、可視光カットフィルターを特に設けなくてもよ
い。
Therefore, the center wavelength of the LED is 7
It is preferably located between 30 and 840 nm, and particularly when the center wavelength is 780 nm, as shown in FIG.
The point at which the sensitivity of the CD camera is reduced and the amount of light emitted to the visible light region are exactly balanced. 780n
Although the light of m is invisible to the human eye, the emission spectrum is broadened as shown in FIG. 5, and the emission spectrum also exists in the visible light region of 700 nm or less. Therefore, a visible light cut filter may be provided in the input section of the CCD camera, but since the amount of light emission in the visible light region is very small, the visible light cut filter may not be particularly provided.

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

【図1】本実施形態に係る発光ダイオードの外観を示す
FIG. 1 is a view showing the appearance of a light emitting diode according to an embodiment.

【図2】図1の発光ダイオードを実装した照明装置FIG. 2 is a lighting device on which the light emitting diode of FIG. 1 is mounted.

【図3】720nmにピークを有するLEDと代表的な
CCDカメラの感度とを対比させた図
FIG. 3 is a diagram comparing an LED having a peak at 720 nm with the sensitivity of a typical CCD camera.

【図4】850nmにピークを有するLEDと代表的な
CCDカメラの感度とを対比させた図
FIG. 4 is a diagram comparing an LED having a peak at 850 nm with the sensitivity of a typical CCD camera.

【図5】780nmにピークを有するLEDと代表的な
CCDカメラの感度とを対比させた図
FIG. 5 is a diagram comparing an LED having a peak at 780 nm with the sensitivity of a typical CCD camera.

【図6】従来技術に係る発光ダイオードの外観を示す図FIG. 6 is a view showing the appearance of a light emitting diode according to the related art.

【図7】図6の発光ダイオードを実装した照明装置FIG. 7 is a lighting device mounted with the light emitting diode of FIG. 6;

【符号の説明】[Explanation of symbols]

1 発光ダイオード 2 カソード端子 3 アノード端子 4 集光部材 X 光軸 DESCRIPTION OF SYMBOLS 1 Light emitting diode 2 Cathode terminal 3 Anode terminal 4 Condensing member X Optical axis

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成11年4月8日[Submission date] April 8, 1999

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】特許請求の範囲[Correction target item name] Claims

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【特許請求の範囲】[Claims]

【手続補正2】[Procedure amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0007[Correction target item name] 0007

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
本発明に係る発光ダイオードは、光を光軸に沿って照射
するチップと、このチップが内部に設けられると共に前
記チップから照射される光を集光する集光部材とを備
え、この集光部材の先端部を球状に形成すると共に前記
光軸方向から見た形状を正6角形に形成し、かつ、前記
集光部材にはフランジが設けられていないことを特徴と
するものである。
In order to achieve the above object, a light emitting diode according to the present invention comprises a chip for irradiating light along an optical axis, a light provided inside the chip, and a light irradiated from the chip. A light-collecting member for condensing the light, the tip of the light-collecting member is formed in a spherical shape, the shape viewed from the optical axis direction is formed as a regular hexagon, and the light-collecting member has a flange. It is characterized by not being provided.

【手続補正3】[Procedure amendment 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0008[Correction target item name] 0008

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0008】正6角形にしたので、これを多数個ならべ
て配置すると円形のものよりも高密度に配置することが
できるので、単位面積当たりの光量を従来技術に比べて
増加させることができる。また、正六角形が発光効率を
犠牲にせずに配置することができる。
Since a regular hexagon is formed, a large number of the hexagons can be arranged more densely than a circular one, so that the amount of light per unit area can be increased as compared with the prior art. Further, regular hexagons can be arranged without sacrificing luminous efficiency.

【手続補正4】[Procedure amendment 4]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0009[Correction target item name] 0009

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0009】また集光部材は、前記光軸に沿って断面正
6角形の形状を有する。これにより、効率よく多数個な
らべて配置することができる。
The condensing member has a regular hexagonal cross section along the optical axis. As a result, a large number can be efficiently arranged.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 光を光軸に沿って照射するチップと、こ
のチップから照射される光を集光する集光部材とを備
え、この集光部材の前記光軸方向から見た形状を正多角
形にしたことを特徴とする発光ダイオード。
1. A chip for irradiating light along an optical axis, and a condensing member for condensing light emitted from the chip, wherein the shape of the condensing member as viewed from the optical axis direction is correct. A light-emitting diode having a polygonal shape.
【請求項2】 前記正多角形は正6角形であることを特
徴とする請求項1に記載の発光ダイオード。
2. The light emitting diode according to claim 1, wherein the regular polygon is a regular hexagon.
【請求項3】 前記照射される光の中心波長は730n
m〜840nmの間に位置することを特徴とする請求項
1又は2に記載の発光ダイオード。
3. The center wavelength of the irradiated light is 730n.
The light emitting diode according to claim 1, wherein the light emitting diode is located between m and 840 nm.
JP10151260A 1998-06-01 1998-06-01 Light emitting diode Pending JPH11346003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10151260A JPH11346003A (en) 1998-06-01 1998-06-01 Light emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10151260A JPH11346003A (en) 1998-06-01 1998-06-01 Light emitting diode

Publications (1)

Publication Number Publication Date
JPH11346003A true JPH11346003A (en) 1999-12-14

Family

ID=15514783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10151260A Pending JPH11346003A (en) 1998-06-01 1998-06-01 Light emitting diode

Country Status (1)

Country Link
JP (1) JPH11346003A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002185047A (en) * 2000-11-13 2002-06-28 Ind Technol Res Inst Face light source generator
DE10214566A1 (en) * 2002-04-02 2003-10-30 G L I Global Light Ind Gmbh Homogeneous parallel light emitting diode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002185047A (en) * 2000-11-13 2002-06-28 Ind Technol Res Inst Face light source generator
DE10214566A1 (en) * 2002-04-02 2003-10-30 G L I Global Light Ind Gmbh Homogeneous parallel light emitting diode
DE10214566B4 (en) * 2002-04-02 2007-05-24 G.L.I. Global Light Industries Gmbh Homogeneously parallel light-emitting light-emitting diode

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