JPS5921412Y2 - light emitting display device - Google Patents
light emitting display deviceInfo
- Publication number
- JPS5921412Y2 JPS5921412Y2 JP1978000429U JP42978U JPS5921412Y2 JP S5921412 Y2 JPS5921412 Y2 JP S5921412Y2 JP 1978000429 U JP1978000429 U JP 1978000429U JP 42978 U JP42978 U JP 42978U JP S5921412 Y2 JPS5921412 Y2 JP S5921412Y2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- emitting element
- base
- emitting display
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L24/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【考案の詳細な説明】
本考案は発光素子を複数個並べて文字１図形等を表示す
る発光表示装置に関する。[Detailed Description of the Invention] The present invention relates to a light emitting display device that displays characters, figures, etc. by arranging a plurality of light emitting elements.
従来から、卓上計算機等において数字を表示する場合第
１図ａ及びｂに示す如く基体１上に日の字形に形成され
た７個の数字表示用セグメントの各発光素子２，２・・
・・・・を選択的に発光させ数字として表示させる方法
が用いられている。Conventionally, when displaying numbers on a desktop calculator or the like, each of the light emitting elements 2, 2, .
A method of selectively emitting light and displaying them as numbers is used.
しかし、この様な発光表示装置においては、各発光表示
２，２・・・・・・を囲む反゛射体３は、基体１とは別
に製造され、その後に光拡散体混合樹脂６により全体が
封しられ基体と一体化される。However, in such a light emitting display device, the reflector 3 surrounding each light emitting display 2, 2, . is sealed and integrated with the base.
したがって、基体１と反射体３が独立して製造されたも
のであるために、どうしても両者の接合部８にすきまが
生じてしまい、このすきまから光もれが起ってしまう。Therefore, since the base 1 and the reflector 3 are manufactured independently, a gap inevitably occurs at the joint 8 between the two, and light leaks through this gap.
また、ＧａＰ 、ＧａＡｓＰ等の発光素子の配光特性は
第２図に示す様なものであり、ＰＮ接合面９に対して垂
直方向のみでなく、あらゆる方向に発光している事を示
している。Furthermore, the light distribution characteristics of light emitting elements such as GaP and GaAsP are as shown in Figure 2, which shows that light is emitted not only in the direction perpendicular to the PN junction surface 9 but also in all directions. .
なお図においてイはＧａＰ発光素子、口はＧａＡｓＰ発
光素子の場合を示している。Note that in the figure, A indicates a GaP light emitting element, and the opening indicates a GaAsP light emitting element.
したがって第１図すに示す様に、光もれの原因となる基
体１と反射体３の接合部８が発光素子２とほぼ同じ高さ
にあるということは、発光素子２の横方向からの直接光
がもれてしまうことになり、非常に好ましくない。Therefore, as shown in Figure 1, the fact that the joint 8 between the base 1 and the reflector 3, which causes light leakage, is at almost the same height as the light emitting element 2 means that Direct light will leak, which is extremely undesirable.
本考案は上記の様な欠点に鑑みてなされたもので、目的
とするところは発光素子の横方向からの発光をも十分に
利用し、光もれの少ない、明るい発光表示装置を提供す
ることである。The present invention was developed in view of the above-mentioned drawbacks, and the purpose is to provide a bright light-emitting display device that fully utilizes the light emitted from the light-emitting elements in the lateral direction and has less light leakage. It is.
本考案に係る発光表示装置は基体表面に、その表面に近
くなるほど開口面積を広くするテーパー状の開口形状を
した凹部を設は該凹部に金属膜を形成することにより、
該凹部に載置する発光素子への給電を可能にし、かつ該
凹部は載置された前記発光素子の上表面が前記基体の延
長表面下になる程度の深さにすることを特徴としている
。The light emitting display device according to the present invention has a concave portion in the shape of a tapered opening whose opening area increases as it gets closer to the surface of the substrate, and by forming a metal film in the concave portion,
The recess is characterized in that power can be supplied to the light emitting element placed in the recess, and the recess has a depth such that the upper surface of the placed light emitting element is below the extended surface of the base.
以下、本考案の一実施例を図面を参照しながら詳細に説
明していく。Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第３図ａは発光表示装置に使用される一つのセグメント
部の平面図すはその断面図を示している。FIG. 3a shows a plan view or a sectional view of one segment used in a light emitting display.
図においては１は紙エポキシ樹脂あるいはガラスエポキ
シ樹脂等よりなる基体である。In the figure, 1 is a base made of paper epoxy resin, glass epoxy resin, or the like.
この基体１の表面を、Ｎｉ 、Ｃｕ 、Ａｕ等の金属膜
４，５で必要とする電極形状にパターニングした後に、
所定のプレス加工により凹部１０が形成される。After patterning the surface of this base 1 with metal films 4 and 5 of Ni, Cu, Au, etc. into the required electrode shape,
The recess 10 is formed by a predetermined press process.
この後に発光素子２を導電性樹脂により金属膜４上にマ
ウントする。After this, the light emitting element 2 is mounted on the metal film 4 using a conductive resin.
さらにもう一方の電極は金属膜５にＡｕ線７等により配
設する。Furthermore, the other electrode is provided on the metal film 5 using an Au wire 7 or the like.
この段階で、前記凹部は基体表面に近くなるはどその開
口面積を広くするテーパー状の開口形状とし、しかも発
光素子２をマウントした時に、この素子２の上表面が基
体１の実質的な表面より低い位置になる程度の深さが必
要である。At this stage, the recess has a tapered opening shape that widens the opening area as it approaches the substrate surface, and when the light emitting element 2 is mounted, the upper surface of this element 2 is substantially the surface of the substrate 1. It needs to be deep enough to reach a lower position.
例えば発光素子２の厚さがＱ、３ｍｍ程度であるため、
凹部の深さが０．５ｍｍ程度になる様に形成する。For example, since the thickness of the light emitting element 2 is Q, about 3 mm,
The recess is formed to have a depth of approximately 0.5 mm.
一方、金属膜４，５は各外部電極（図示せず）に接続さ
れる。On the other hand, the metal films 4 and 5 are connected to each external electrode (not shown).
さらに、この様な反射型構造を有する基体上に文字、数
字、記号等の表示をするための機能素子反射体３を密着
固定する。Furthermore, a functional element reflector 3 for displaying characters, numbers, symbols, etc. is tightly fixed onto the substrate having such a reflective structure.
この反射体３は一般には同図すに示す様に、基体１と接
合する部分が最も開口面積が小さく、表示窓に近くなる
ほどその開口面積を広くする形状を有する。As shown in the figure, this reflector 3 generally has a shape in which the opening area is the smallest at the portion where it joins with the base 1, and the opening area increases as it approaches the display window.
この反射体３としては、ポリカーボネートやＡＢＳ樹脂
等の反射率の高い材料が使用される。As this reflector 3, a material with high reflectance such as polycarbonate or ABS resin is used.
さらに、基体１と反射体３を固定し、反射体内の発光を
均一にするために、光拡散体ＳｉＯ２，ＴｉＯ２゜Ａｌ
２Ｏ３等を混入したエポキシ樹脂６で全体を封じる。Furthermore, in order to fix the base 1 and the reflector 3 and make the light emission uniform within the reflector, a light diffuser SiO2, TiO2゜Al
The whole is sealed with epoxy resin 6 mixed with 2O3 or the like.
係る構造の発光表示装置においては、発光素子２の横方
向の光は凹部１０の金属膜４，５により反射される。In the light emitting display device having such a structure, the light emitted from the light emitting element 2 in the lateral direction is reflected by the metal films 4 and 5 of the recess 10.
さらに反射体３と基体１との接合部８が発光素子２の上
方にあるため、発光素子２からの直接光が接合部８！７
）すきまからもれることはない。Furthermore, since the joint 8 between the reflector 3 and the base 1 is located above the light emitting element 2, direct light from the light emitting element 2 is transmitted to the joint 8!7.
) It will not leak through the gaps.
本考案により改善された発光表示装置が得られた一例と
して発光素子２からの全発光量を１００％とし、反射体
３の表示窓から放出される有効光量の変化を、反射体３
と基体１とのすきまを横軸にとり本考案によるものイ、
従来例によるもの口のグラフを描くと第４図に示す様な
ものになり、本考案により、外部放出有効光量が著しく
増したことを示している。As an example of an improved light emitting display device obtained by the present invention, the total amount of light emitted from the light emitting element 2 is assumed to be 100%, and the change in the effective amount of light emitted from the display window of the reflector 3 is expressed as follows:
According to the present invention, the horizontal axis is the gap between the base body 1 and the
The graph of the conventional example is as shown in FIG. 4, which shows that the amount of effective light emitted to the outside has been significantly increased by the present invention.
なお、グラフの１９口の示す値にばらつき（範囲）があ
るのは、反射体の材質９反射面の角度等により有効光量
が変化することを示している。It should be noted that the variation (range) in the values indicated by 19 in the graph indicates that the effective light amount changes depending on the material 9 of the reflector, the angle of the reflective surface, etc.
通常、反射体と基板のすきまがＱ、１ｍｍ程度あるもの
と考えるから、グラフから明らかな様に、本考案によれ
ば従来例・に比べ２〜３倍程度効率の良い発光表示装置
が得られる。Normally, it is assumed that the gap between the reflector and the substrate is Q, about 1 mm, so as is clear from the graph, the present invention can provide a light emitting display device that is about 2 to 3 times more efficient than the conventional example. .
また、前後するが、前述した様に、接合部８から発光素
子２の直接光のもれがなくなったため、従来、例えば第
１図ａにおいて０を表示させるべきところ、各素子から
の光のもれのために８の様に見えることもあり、点灯し
ているセグメントと、そうでないものとのコントラスト
がはっきりしない場合があったが、本考案に係る発光表
示装置においては、その点においても改善され、不点灯
部９点灯部のコントラストが非常に良くなった。Also, as mentioned above, since the leakage of direct light from the light emitting element 2 from the joint 8 is eliminated, the light from each element is now displayed, whereas conventionally, for example, in Figure 1a, 0 should be displayed. As a result, the light-emitting display device according to the present invention has been improved in this respect as well. As a result, the contrast between the unlit part 9 and the lit part became very good.
また反射型発光表示装置においては、多重反射体構造の
方が反射面の角度の調整等により均一な発光面を得るこ
とができるため本考案の一例に示す２重反射体構造も、
その点においても効果的である。In addition, in reflective light emitting display devices, the multiple reflector structure allows a more uniform light emitting surface to be obtained by adjusting the angle of the reflective surface, so the double reflector structure shown in one example of the present invention also
It is effective in that respect as well.
なお、本実施例においては、基体上の凹部内面に、発光
素子２への給電と反射の役目をする金属膜を形成した場
合について説明したが、該凹部は基体表面に近くなるほ
ど開口面積を広くするテーパー状であり、しかも基体材
料としてガラスエポキシ樹脂等を使用しており金属膜が
なくてもその斜面にて発光素子の横方向の光を十分反射
させることができる。In this example, a case has been described in which a metal film is formed on the inner surface of the recess on the base body to feed and reflect power to the light emitting element 2, but the opening area of the recess becomes wider as it approaches the base surface. Moreover, since glass epoxy resin or the like is used as the base material, the lateral light of the light emitting element can be sufficiently reflected on the slope even without a metal film.
例えば、基体１として、絶縁物を使用しているために発
光素子と基体との間の金属膜は必要であるが、第５図ａ
、ｌ）の様に金属膜は、必ずしも・凹部１０の全斜面に
形成する必要はなく、発光素子２への給電が可能であれ
ば、本考案の期待する効果、すなわち発光素子２からの
直接光のもれ、防止、凹部１０の斜面を利用して反射を
行なわせることができ、この場合の有効光量も第４図の
イの範囲内に含まれるという結果が得られた。For example, since an insulator is used as the base 1, a metal film between the light emitting element and the base is necessary, but as shown in FIG.
, l), the metal film does not necessarily need to be formed on the entire slope of the recess 10, and as long as it is possible to supply power to the light emitting element 2, the desired effect of the present invention, that is, direct power from the light emitting element 2 can be achieved. It was possible to prevent light from leaking and to make it reflect by using the slope of the recess 10, and the result was that the effective amount of light in this case was also within the range A in FIG. 4.
第１図ａは発光表示装置の平面図、ｂは従来例の断面図
、第２図は発光素子の配光特性を示すグラフ、第３図ａ
は本考案の一実施例を示す平面図、ｂは同断面図、第４
図は従来例と本考案による装置とを比較するためのグラ
フ、第５図ａ乃至すは本考案のもう一つの実施例を示す
平面図及び断面図を示す。
１・・・・・・基体、２・・・・・・半導体発光素子、
３・・・・・・反射体、４．５・・・・・・金属膜、６
・・・・・・光拡散体混合樹脂、７・・・・・・ワイヤ
リード線、８・・・・・・反射体と基体の接合部、９・
・・・・・ＰＮ接合部、１０・・・・・・凹部。Figure 1a is a plan view of the light emitting display device, b is a sectional view of a conventional example, Figure 2 is a graph showing the light distribution characteristics of the light emitting element, and Figure 3a is a graph showing the light distribution characteristics of the light emitting element.
is a plan view showing one embodiment of the present invention, b is a sectional view of the same, and 4th
The figure shows a graph for comparing the conventional example and the device according to the present invention, and a plan view and a sectional view showing another embodiment of the present invention. 1...Base, 2...Semiconductor light emitting device,
3...Reflector, 4.5...Metal film, 6
...... Light diffuser mixed resin, 7... Wire lead wire, 8... Joint part of reflector and base, 9.
...PN junction, 10 ... recess.
Claims (1)
ための反射体を有する発光表示装置において、前記基体
表面に近くなるほど開口面積を広くするテーパー状の開
口形状をした凹部を設け、該凹部に前記発光素子の電極
給電用の金属膜を設け、かつ該凹部は、載置された前記
発光素子の上表面が前記基体の延長表面下になる程度の
深さにすることを特徴とする発光表示装置。In a light emitting display device having a reflector on a base for giving directionality to light emitted from a semiconductor light emitting element, a concave portion having a tapered opening shape whose opening area increases as it approaches the surface of the base is provided, and the concave portion A light-emitting display characterized in that a metal film is provided for electrode power supply of the light-emitting element, and the recess is deep enough that the upper surface of the light-emitting element placed thereon is below the extended surface of the base. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978000429U JPS5921412Y2 (en) | 1978-01-09 | 1978-01-09 | light emitting display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978000429U JPS5921412Y2 (en) | 1978-01-09 | 1978-01-09 | light emitting display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54105285U JPS54105285U (en) | 1979-07-24 |
| JPS5921412Y2 true JPS5921412Y2 (en) | 1984-06-23 |
Family
ID=28801686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978000429U Expired JPS5921412Y2 (en) | 1978-01-09 | 1978-01-09 | light emitting display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921412Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3033883B2 (en) * | 1994-11-30 | 2000-04-17 | ローム株式会社 | Light emitting display |
| JP4045781B2 (en) * | 2001-08-28 | 2008-02-13 | 松下電工株式会社 | Light emitting device |
| US7889421B2 (en) * | 2006-11-17 | 2011-02-15 | Rensselaer Polytechnic Institute | High-power white LEDs and manufacturing method thereof |
| US9178123B2 (en) * | 2012-12-10 | 2015-11-03 | LuxVue Technology Corporation | Light emitting device reflective bank structure |
-
1978
- 1978-01-09 JP JP1978000429U patent/JPS5921412Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54105285U (en) | 1979-07-24 |
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