JP3110182B2 - Light emitting diode lamp - Google Patents
Light emitting diode lampInfo
- Publication number
- JP3110182B2 JP3110182B2 JP04350884A JP35088492A JP3110182B2 JP 3110182 B2 JP3110182 B2 JP 3110182B2 JP 04350884 A JP04350884 A JP 04350884A JP 35088492 A JP35088492 A JP 35088492A JP 3110182 B2 JP3110182 B2 JP 3110182B2
- Authority
- JP
- Japan
- Prior art keywords
- emitting diode
- light emitting
- light
- diode lamp
- rising angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/531—Shapes of wire connectors
- H10W72/536—Shapes of wire connectors the connected ends being ball-shaped
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/531—Shapes of wire connectors
- H10W72/5363—Shapes of wire connectors the connected ends being wedge-shaped
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/756—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked lead frame, conducting package substrate or heat sink
Landscapes
- Led Device Packages (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、発光ダイオード素子を
封止したドーム状のレンズ部からリード端子が導出され
てなる発光ダイオードランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode lamp in which lead terminals are led out of a dome-shaped lens portion in which a light emitting diode element is sealed.
【０００２】[0002]
【従来の技術】従来のこの種の発光ダイオードランプの
構成を図４を参照して説明する。図４（ａ）示すよう
に、この発光ダイオードランプは、一方のリード端子１
ａの先端に形成されたパラボラと称される碗状凹部２内
に発光ダイオード素子３を固着し、この発光ダイオード
素子３と他方のリード端子１ｂとを金属細線４で接続
し、発光ダイオード素子３および金属細線４を透光性樹
脂で封止してドーム状のレンズ部５を形成している。2. Description of the Related Art The structure of a conventional light emitting diode lamp of this type will be described with reference to FIG. As shown in FIG. 4A, this light emitting diode lamp has one lead terminal 1.
The light-emitting diode element 3 is fixed in a bowl-shaped recess 2 called a parabola formed at the tip of a, and the light-emitting diode element 3 and the other lead terminal 1b are connected by a thin metal wire 4, and the light-emitting diode element 3 The dome-shaped lens portion 5 is formed by sealing the thin metal wire 4 with a translucent resin.
【０００３】碗状凹部２は、その内部壁面の立ち上がり
角度が全周囲にわたって略同一になるように形成されて
いる。したがって、発光ダイオード素子３から水平方向
に照射された光は、碗状凹部２の内部壁面の全周囲につ
いて、略同一の角度で反射されて上方に導かれるので、
この発光ダイオードランプの指向性は、図４（ｂ），
（ｃ）に示すように、レンズ部５の光軸回りに均等であ
る。[0003] The bowl-shaped recess 2 is formed such that the rising angle of its inner wall surface is substantially the same over the entire circumference. Therefore, the light emitted in the horizontal direction from the light emitting diode element 3 is reflected at substantially the same angle and guided upward around the entire inner wall surface of the bowl-shaped concave portion 2,
The directivity of this LED lamp is shown in FIG.
As shown in (c), it is uniform around the optical axis of the lens unit 5.
【０００４】[0004]
【発明が解決しようとする課題】ところで、近年、多数
の発光ダイオードランプを二次元配置して、文字などを
表示するドットマトリクス表示装置が提案実施されてい
る。図５に示すように、このような表示装置６は、複数
人の観察者によって任意の位置から見られるが、各観察
者の視線の高さには大差がない。したがって、表示装置
６は、左右方向については広い指向性を備えていること
が好ましいが、上下方向について狭い指向性で足りる。Incidentally, in recent years, a dot matrix display device in which a large number of light emitting diode lamps are two-dimensionally arranged to display characters and the like has been proposed and implemented. As shown in FIG. 5, such a display device 6 can be viewed from an arbitrary position by a plurality of observers, but there is no great difference in the height of the line of sight of each observer. Therefore, the display device 6 preferably has a wide directivity in the left-right direction, but a narrow directivity in the up-down direction is sufficient.
【０００５】このような指向特性上の要請に反して、上
述した従来の発光ダイオードランプは、全周囲に同じ指
向性を備えているので、表示装置６の左右の指向性を拡
げようとすると、必然的に、上下の指向性が拡がる。そ
の結果、観察者に認識されない余分な光が上下方向に放
出されることになるので、観察者から見た表示装置６の
光度を充分に上げることができないという問題点があ
る。逆に、上下の指向性を狭くして光度を上げようとす
ると、左右の指向性が狭くなり、表示装置６に対面して
ない観察者は、その表示内容が見づらくなる。[0005] Contrary to such demands on the directional characteristics, the above-mentioned conventional light emitting diode lamp has the same directivity all around. Therefore, if the directivity of the left and right sides of the display device 6 is to be expanded, Inevitably, the directivity in the vertical direction expands. As a result, extra light that is not recognized by the observer is emitted in the vertical direction, so that there is a problem that the luminous intensity of the display device 6 viewed from the observer cannot be sufficiently increased. Conversely, if it is attempted to increase the luminous intensity by narrowing the directivity in the upper and lower directions, the directivity in the left and right becomes narrower, making it difficult for an observer not facing the display device 6 to see the display content.
【０００６】本発明は、このような事情に鑑みてなされ
たものであって、ドットマトリクス表示装置などに利用
されるのに適した発光ダイオードランプを提供すること
を目的としている。The present invention has been made in view of such circumstances, and has as its object to provide a light emitting diode lamp suitable for use in a dot matrix display device or the like.
【０００７】[0007]
【課題を解決するための手段】本発明は、このような目
的を達成するために、次のような構成をとる。すなわ
ち、本発明は、一方のリード端子の先端に形成された碗
状凹部内に発光ダイオード素子を固着し、前記発光ダイ
オード素子と他方のリード端子とを金属細線で接続し、
前記発光ダイオード素子および金属細線を透光性樹脂で
封止した発光ダイオードランプにおいて、前記碗状凹部
は、直交する各縦断面において、一方の内部壁面が緩慢
な立ち上がり角度をもち、他方の内部壁面が急峻な立ち
上がり角度をもつものである。The present invention has the following configuration in order to achieve the above object. That is, according to the present invention, a light-emitting diode element is fixed in a bowl-shaped recess formed at the tip of one lead terminal, and the light-emitting diode element and the other lead terminal are connected by a thin metal wire.
In the light-emitting diode lamp in which the light-emitting diode element and the thin metal wire are sealed with a translucent resin, in each of the orthogonal cross sections, one inner wall surface has a slow rising angle and the other inner wall surface has a gentle rising angle. Has a steep rising angle.
【０００８】[0008]
【作用】本発明の作用は次のとおりである。すなわち、
発光ダイオード素子が固着される碗状凹部の内部壁面
が、直交する各縦断面において、一方が緩慢な立ち上が
り角度をもち、他方が急峻な立ち上がり角度をもつの
で、緩慢な立ち上がり角度の壁面で反射された光は広い
範囲に拡がって放出され、一方、急峻な立ち上がり角度
の壁面で反射された光は狭い範囲内で放出される。した
がって、この発光ダイオードランプは、直交する方向で
広狭二つの指向性をもつことになる。The operation of the present invention is as follows. That is,
The inner wall surface of the bowl-shaped concave portion to which the light-emitting diode element is fixed is reflected on the wall surface with a slow rising angle because one of the vertical walls has a slow rising angle and the other has a steep rising angle in each of the vertical cross sections. The reflected light is emitted in a wide range, while the light reflected on the wall with a steep rising angle is emitted in a narrow range. Therefore, this light-emitting diode lamp has two directivities that are wide and narrow in the orthogonal direction.
【０００９】[0009]
【実施例】以下、図面を参照して本発明の一実施例を説
明する。図１は、実施例に係る発光ダイオードランプの
リード端子先端部の構造を示しており、同図（ａ）は平
面図、同図（ｂ）は（ａ）のＸ−Ｘ矢視断面図、同図
（ｃ）は（ａ）のＹ−Ｙ矢視断面図である。An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show a structure of a lead terminal tip portion of a light emitting diode lamp according to an embodiment, wherein FIG. 1A is a plan view, FIG. 1B is a sectional view taken along line XX of FIG. FIG. 3C is a sectional view taken along the line YY in FIG.
【００１０】一方のリード端子１ａの先端部に、平面視
が楕円形の碗状凹部１２が形成されており、この碗状凹
部１２内に発光ダイオード素子３が固着されている。こ
の発光ダイオード素子３は、金属細線４を介して他方の
リード端子１ｂに接続されている。碗状凹部１２は、直
交する各縦断面Ｘ−Ｘ，Ｙ−Ｙで、それぞれ内部壁面の
立ち上がり角度が異なるように形成されている。すなわ
ち、同図（ｂ）に示すように、Ｘ−Ｘ断面では緩慢な立
ち上がり壁面１２ａをもち、同図（ｃ）に示すように、
Ｙ−Ｙ断面では急峻な立ち上がり壁面１２ｂをもち、全
周囲にわたって壁面の立ち上がり角度は滑らかに変化し
ている。A bowl-shaped recess 12 having an elliptical plan view is formed at the tip of one of the lead terminals 1a, and the light emitting diode element 3 is fixed in the bowl-shaped recess 12. The light emitting diode element 3 is connected to the other lead terminal 1b via a thin metal wire 4. The bowl-shaped concave portion 12 is formed such that the rising angles of the inner wall surfaces thereof are different from each other in the orthogonal vertical sections XX and YY. That is, as shown in FIG. 6B, the cross section XX has a slow rising wall surface 12a, and as shown in FIG.
The Y-Y section has a steep rising wall surface 12b, and the rising angle of the wall surface changes smoothly over the entire circumference.
【００１１】図２は、上述したリード端子構造をもった
発光ダイオードランプの指向特性を示している。図２
（ａ）に示すように、透光性樹脂からなるドーム状のレ
ンズ部５自身の指向性は、図４に示した従来の発光ダイ
オードランプのレンズ部と同様に、全周囲について均一
である。FIG. 2 shows the directional characteristics of a light emitting diode lamp having the above-described lead terminal structure. FIG.
As shown in (a), the directivity of the dome-shaped lens portion 5 itself made of a translucent resin is uniform over the entire circumference, similarly to the lens portion of the conventional light emitting diode lamp shown in FIG.
【００１２】図１（ｂ）に示したように、立ち上がり角
度の緩慢な内部壁面１２ａで反射された光は、レンズ部
５である程度は集束されるものの、比較的広範囲に拡が
って出射される。図２（ｂ）にＸ−Ｘ断面の指向性を示
す。一方、図１（ｃ）に示したように、立ち上がり角度
の急峻な内部壁面１２ｂで反射された光は、狭い範囲内
でレンズ部５から出射される。その指向特性を図２
（ｃ）に示す。このように本実施例に係る発光ダイオー
ドランプは、直交する２方向で広狭二つの指向性をもつ
ので、図５に示したドットマトリクス表示装置のよう
に、上下と左右で異なる指向性が要求される用途に好適
である。As shown in FIG. 1B, the light reflected on the inner wall surface 12a having a slow rising angle is converged to some extent by the lens unit 5, but is emitted in a relatively wide range. FIG. 2B shows the directivity of the XX section. On the other hand, as shown in FIG. 1C, the light reflected on the inner wall surface 12b having a steep rising angle is emitted from the lens unit 5 within a narrow range. Figure 2 shows the directional characteristics.
It is shown in (c). As described above, the light-emitting diode lamp according to the present embodiment has two directivities, wide and narrow in two orthogonal directions, and thus requires different directivities in the vertical and horizontal directions as in the dot matrix display device shown in FIG. It is suitable for various uses.
【００１３】図３は、本発明の別実施例のリード端子構
造を示している。図３（ａ）に示すように、本実施例の
碗状凹部２２は、平面視が円形で、底部が楕円形を呈し
ている。このような碗状凹部２２によっても、図３
（ｂ），（ｃ）にそれぞれ示すように、直交する各縦断
面において、緩慢な立ち上がり内部壁面２２ａと、急峻
な立ち上がり内部壁面２２ｂを得られるので、上述した
実施例と同様の効果を得ることができる。FIG. 3 shows a lead terminal structure according to another embodiment of the present invention. As shown in FIG. 3A, the bowl-shaped recess 22 of the present embodiment has a circular shape in plan view and an elliptical bottom. FIG. 3 also shows such a bowl-shaped recess 22.
As shown in (b) and (c), a slow rising internal wall surface 22a and a steep rising internal wall surface 22b can be obtained in each of the vertical cross sections orthogonal to each other, so that the same effect as in the above-described embodiment can be obtained. Can be.
【００１４】[0014]
【発明の効果】以上の説明から明らかなように、本発明
によれば、発光ダイオード素子が固着される碗状凹部の
内部壁面が、直交する各縦断面において、一方が緩慢な
立ち上がり角度をもち、他方が急峻な立ち上がり角度を
もつので、ドットマトリクス表示装置などに適した、直
交する２方向について広狭二つの指向特性をもった発光
ダイオードランプを容易に得ることができる。As is apparent from the above description, according to the present invention, one of the inner wall surfaces of the bowl-shaped recess to which the light emitting diode element is fixed has a slow rising angle in each of the perpendicular cross sections. Since the other has a steep rising angle, it is possible to easily obtain a light emitting diode lamp suitable for a dot matrix display device or the like, having two directional characteristics which are wide and narrow in two orthogonal directions.
【図１】実施例に係る発光ダイオードランプのリード端
子構造を示す図である。FIG. 1 is a view showing a lead terminal structure of a light emitting diode lamp according to an embodiment.
【図２】実施例に係る発光ダイオードランプの指向性を
示す図である。FIG. 2 is a diagram illustrating directivity of a light emitting diode lamp according to an example.
【図３】別実施例に係る発光ダイオードランプのリード
端子構造を示す図である。FIG. 3 is a view showing a lead terminal structure of a light emitting diode lamp according to another embodiment.
【図４】従来の発光ダイオードランプの指向性を示す図
である。FIG. 4 is a diagram showing the directivity of a conventional light emitting diode lamp.
【図５】ドットマトリクス表示装置の説明図である。FIG. 5 is an explanatory diagram of a dot matrix display device.
【符号の説明】 １ａ…リード端子 ２ｂ…リード端子 ３…発光ダイオード素子 ４…金属細線 ５…レンズ部 ６…ドットマトリクス表示装置 １２…碗状凹部 ２２…碗状凹部[Description of Signs] 1a Lead terminal 2b Lead terminal 3 Light-emitting diode element 4 Thin metal wire 5 Lens part 6 Dot matrix display device 12 Bowl-shaped recess 22 Bowl-shaped recess
フロントページの続き (56)参考文献 特開 平５−226703（ＪＰ，Ａ) 特開 平５−55636（ＪＰ，Ａ) 特開 平２−29686（ＪＰ，Ａ) 特開 昭55−46573（ＪＰ，Ａ) 実開 昭61−44861（ＪＰ，Ｕ) 実開 昭64−49987（ＪＰ，Ｕ) 実開 昭57−44565（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01L 33/00 Continuation of the front page (56) References JP-A-5-226703 (JP, A) JP-A-5-55636 (JP, A) JP-A-2-29686 (JP, A) JP-A-55-46573 (JP) , A) Fully open sho 61-44861 (JP, U) Fully open sho 64-49987 (JP, U) Real open sho 57-44565 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB Name) H01L 33/00
Claims (1)
状凹部内に発光ダイオード素子を固着し、前記発光ダイ
オード素子と他方のリード端子とを金属細線で接続し、
前記発光ダイオード素子および金属細線を透光性樹脂で
封止した発光ダイオードランプにおいて、前記碗状凹部
は、直交する各縦断面において、一方の内部壁面が緩慢
な立ち上がり角度をもち、他方の内部壁面が急峻な立ち
上がり角度をもつことを特徴とする発光ダイオードラン
プ。1. A light emitting diode element is fixed in a bowl-shaped recess formed at the tip of one lead terminal, and the light emitting diode element and the other lead terminal are connected by a thin metal wire.
In the light-emitting diode lamp in which the light-emitting diode element and the thin metal wire are sealed with a translucent resin, in each of the orthogonal cross sections, one of the inner wall surfaces has a slow rising angle and the other inner wall surface has a slow rising angle. Has a steep rising angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04350884A JP3110182B2 (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04350884A JP3110182B2 (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06177428A JPH06177428A (en) | 1994-06-24 |
| JP3110182B2 true JP3110182B2 (en) | 2000-11-20 |
Family
ID=18413552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04350884A Expired - Fee Related JP3110182B2 (en) | 1992-12-03 | 1992-12-03 | Light emitting diode lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3110182B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4926337B2 (en) * | 2000-06-28 | 2012-05-09 | アバゴ・テクノロジーズ・ジェネラル・アイピー（シンガポール）プライベート・リミテッド | light source |
| US8669565B2 (en) | 2006-04-24 | 2014-03-11 | Cree Huizhou Solid State Lighting Company Limited | LED devices with narrow viewing angle and an LED display including same |
| WO2012135976A1 (en) * | 2011-04-07 | 2012-10-11 | Cree Huizhou Solid State Lighting Company Limited | Led device having tilted peak emission and led display including such devices |
| WO2012139252A1 (en) * | 2011-04-13 | 2012-10-18 | Cree Huizhou Solid State Lighting Company Limited | Led devices with narrow viewing angle and an led display including same |
| US7968900B2 (en) | 2007-01-19 | 2011-06-28 | Cree, Inc. | High performance LED package |
| TWI483436B (en) * | 2010-08-25 | 2015-05-01 | Cree Huizhou Solid State Lighting Co Ltd | Led devices with narrow viewing angle and an led display including same |
| CN102800787A (en) * | 2012-07-23 | 2012-11-28 | 惠州雷曼光电科技有限公司 | Surface mount type light-emitting diode (LED) bracket, surface mount type LED and display screen module |
-
1992
- 1992-12-03 JP JP04350884A patent/JP3110182B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06177428A (en) | 1994-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |