JPH0538944Y2 - - Google Patents
Info
- Publication number
- JPH0538944Y2 JPH0538944Y2 JP1985075873U JP7587385U JPH0538944Y2 JP H0538944 Y2 JPH0538944 Y2 JP H0538944Y2 JP 1985075873 U JP1985075873 U JP 1985075873U JP 7587385 U JP7587385 U JP 7587385U JP H0538944 Y2 JPH0538944 Y2 JP H0538944Y2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- light
- substrate
- diode array
- 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 - Lifetime
Links
- 238000003491 array Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- H01L2224/01—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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Description
【考案の詳細な説明】
イ 産業上の利用分野
本考案は発光ダイオードアレイを用いた光プリ
ンタヘツドに関する。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an optical printer head using a light emitting diode array.
ロ 従来の技術
従来、発光ダイオードアレイを用いた光プリン
タヘツドとして特開昭60−7185号公報などがあ
る。それは第２図に示す様に、基板１１上に発光
ダイオードアレイ１３，１３…が整列して固着さ
れている。斯る発光ダイオードアレイ１３，１３
…では、主面に選択拡散等により多数の独立した
発光領域１４，１４…が形成されている。そして
その発光領域１４，１４…は発光ダイオードアレ
イ１３，１３…の端部に於て光洩れを生じやす
い。これは発光領域１４，１４…が露出してなく
ても発生する。そこで、特開昭57−136379号公報
に於て、発光ダイオードアレイ１３，１３…の端
面に遮光被膜又は反射膜を設けるとよいと主張し
ている。しかし充分な効果をあげるためには膜厚
が極めて厚くなり、その作業性の悪さも加わつて
実用的でない。B. Prior Art Conventionally, there is an optical printer head using a light emitting diode array, such as Japanese Patent Application Laid-open No. 7185/1985. As shown in FIG. 2, light emitting diode arrays 13, 13, . . . are aligned and fixed on a substrate 11. Such light emitting diode array 13, 13
..., a large number of independent light emitting regions 14, 14, ... are formed on the main surface by selective diffusion or the like. The light emitting regions 14, 14... tend to cause light leakage at the ends of the light emitting diode arrays 13, 13.... This occurs even if the light emitting regions 14, 14, . . . are not exposed. Therefore, Japanese Unexamined Patent Publication No. 136379/1984 claims that it is advisable to provide a light shielding film or a reflective film on the end faces of the light emitting diode arrays 13, 13, . . . However, in order to achieve a sufficient effect, the film must be extremely thick, and the workability is also poor, making it impractical.
更にこの公報では、発光ダイオードアレイ１
３，１３…の内部に於て通電しない発光素子が設
けられている。そのため、その分だけ発光有効長
が短くなる欠点が有る。何故ならば、この通電し
ない発光素子を設けると、通電される発光領域が
端部から遠ざかるためである。 Furthermore, in this publication, the light emitting diode array 1
3, 13, . . . are provided with light emitting elements that are not energized. Therefore, there is a drawback that the effective length of light emission is shortened accordingly. This is because if a light emitting element that is not energized is provided, the energized light emitting region moves away from the end.
ところが光プリンタヘツドとして、第２図の如
く１列に発光ダイオードアレイ１３，１３…を整
列させて各発光領域の特性を調べていくうち、近
接する発光ダイオードアレイ同士の隙間に於て特
別な輝度変化又は不所望の光点は生じない事が判
明し、ただ１列に並べた最端縁の発光領域のみ10
〜50％輝度が高いことがわかつた。 However, when using an optical printer head to examine the characteristics of each light emitting area by arranging the light emitting diode arrays 13, 13, etc. in a line as shown in Fig. 2, a special brightness was detected in the gap between adjacent light emitting diode arrays. It was found that no changes or undesired light spots occurred, only the light emitting areas at the edge of the line10
It was found that the brightness was ~50% higher.
ハ 考案が解決しようとする問題点
本考案は上述の点に鑑みてなされたもので、端
部に於て特別な輝度変化のない光プリンタヘツド
を提供するものである。C. Problems to be Solved by the Invention The present invention has been devised in view of the above-mentioned points, and is intended to provide an optical printer head that does not have any particular brightness change at the end.
ニ 問題点を解決するための手段
本考案は発光ダイオードアレイの両端に近接し
て、発光ダイオードアレイと実質的に同等の素材
からなるダミーの発光ダイオードを載置固着した
ものである。D. Means for Solving the Problems In the present invention, dummy light emitting diodes made of substantially the same material as the light emitting diode array are mounted and fixed close to both ends of the light emitting diode array.
ホ 作用
以上の如く、発光ダイオードアレイの整列の端
部に近接して、その発光ダイオードアレイと実質
的に同等の素材からなる発光ダイオードを設ける
ので、端の発光ダイオードアレイと発光ダイオー
ドとの間で特別な輝度変化がなくなる。E. Effect As described above, since the light-emitting diodes made of substantially the same material as the light-emitting diode array are provided close to the ends of the array of light-emitting diode arrays, there is a gap between the light-emitting diode arrays at the ends and the light-emitting diodes. No special brightness changes.
ヘ 実施例
第１図は本考案の実施例に係る光プリンタヘツ
ドの斜視図であり、基板１はセラミツク等からな
り表面に導電性のパターン２，２…が形成されて
いる。複数の発光ダイオードアレイ３，３…は基
板１の略中央部に１列に各々近接して整列載置さ
れ、例えばGaAsP／GaAsからなる。発光ダイオ
ードアレイ３，３…の表面には、選択拡散によつ
て得られた多数の発光領域４，４…が等間隔で設
けてあり、ワイヤボンド細線５，５…等で基板１
のパターン２，２…に配線が施こされている。発
光ダイオード６，６は発光ダイオードアレイ３，
３の整列の端部に近接して、基板１上に載置固着
されている。Embodiment FIG. 1 is a perspective view of an optical printer head according to an embodiment of the present invention, in which a substrate 1 is made of ceramic or the like, and conductive patterns 2, 2, . . . are formed on the surface thereof. A plurality of light emitting diode arrays 3, 3, . . . are arranged in a row near the center of the substrate 1, and are made of, for example, GaAsP/GaAs. On the surface of the light emitting diode arrays 3, 3..., a large number of light emitting regions 4, 4... obtained by selective diffusion are provided at equal intervals, and wire bond thin lines 5, 5..., etc. are used to connect the substrate 1.
Wiring is applied to patterns 2, 2, and so on. The light emitting diodes 6, 6 are the light emitting diode array 3,
3 are placed and fixed on the substrate 1 in close proximity to the ends of the array.
発光ダイオード６，６は発光ダイオードアレイ
３，３…と実質的に同等の素材からなり、例えば
不良又は破損した発光ダイオードアレイを利用で
きる。この発光ダイオード６，６は発光ダイオー
ドアレイ３，３…の端部に近接して載置されるだ
けなので、ワイヤボンド細線等で配線を施こす必
要はない。 The light emitting diodes 6, 6 are made of substantially the same material as the light emitting diode arrays 3, 3, . . . , and for example, defective or damaged light emitting diode arrays can be used. Since the light-emitting diodes 6, 6 are simply placed close to the ends of the light-emitting diode arrays 3, 3, . . ., there is no need for wiring with thin wire bond wires or the like.
ト 考案の効果
以上の如く本考案は、端の発光ダイオードアレ
イ３に近接して、発光ダイオードアレイ３と実質
的に同等の素材からなる発光ダイオード６を設け
る。故に、近接する発光ダイオードアレイ同士の
隙間に於て特別な輝度変化（光ピーク）が生じな
い現象と同様に、端の発光ダイオードアレイ３と
それに近接する発光ダイオード６の隙間に於て特
別な輝度変化が生じないので、発光ダイオードア
レイの端部に於て特別な輝度変化がなくなる。G. Effects of the Invention As described above, in the present invention, the light emitting diode 6 made of substantially the same material as the light emitting diode array 3 is provided close to the end light emitting diode array 3. Therefore, similar to the phenomenon in which no special brightness change (light peak) occurs in the gap between adjacent light emitting diode arrays, there is a special brightness change in the gap between the end light emitting diode array 3 and the adjacent light emitting diode 6. Since no changes occur, there are no particular brightness changes at the ends of the light emitting diode array.
また発光ダイオード６は発光ダイオードアレイ
３の外部に設けられているので、発光ダイオード
アレイ３の発光有効長が従来の長さのままで短く
ならない。更に従来の様に、遮光被膜等の困難な
厚膜作業を必要としないので、製造し易くかつ膜
付けによる短絡事故もなくなる。 Further, since the light emitting diodes 6 are provided outside the light emitting diode array 3, the effective light emitting length of the light emitting diode array 3 remains the conventional length and is not shortened. Furthermore, unlike conventional methods, difficult thick film work such as a light-shielding film is not required, making manufacturing easier and eliminating short-circuit accidents caused by film attachment.
第１図は本考案の実施例に係る光プリンタヘツ
ドの斜視図で、第２図は従来の光プリンタヘツド
の斜視図である。
１……基板、２，２……パターン、３，３……
発光ダイオードアレイ、４，４……発光領域、
５，５……ワイヤボンド細線、６，６……発光ダ
イオード。
FIG. 1 is a perspective view of an optical printer head according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional optical printer head. 1...Substrate, 2,2...Pattern, 3,3...
Light emitting diode array, 4, 4... light emitting area,
5, 5... wire bond thin wire, 6, 6... light emitting diode.
Claims (1)
前記基板上に各々近接して整列載置された複数の
発光ダイオードアレイと、その発光ダイオードア
レイと実質的に同等の素材からなりかつ前記発光
ダイオードアレイの整列の端部に近接して前記基
板上に載置された発光ダイオードとを具備した事
を特徴とする光プリンタヘツド。 a substrate, a plurality of light emitting diode arrays each having a large number of aligned light emitting regions and arranged in close proximity to each other on the substrate; an optical printer head comprising: a light emitting diode mounted on the substrate proximate an end of an array of diode arrays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985075873U JPH0538944Y2 (en) | 1985-05-22 | 1985-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985075873U JPH0538944Y2 (en) | 1985-05-22 | 1985-05-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61196041U JPS61196041U (en) | 1986-12-06 |
| JPH0538944Y2 true JPH0538944Y2 (en) | 1993-10-01 |
Family
ID=30617498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985075873U Expired - Lifetime JPH0538944Y2 (en) | 1985-05-22 | 1985-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0538944Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021082772A (en) * | 2019-11-22 | 2021-05-27 | 株式会社沖データ | Semiconductor device, optical print head, and image forming apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136379A (en) * | 1981-02-17 | 1982-08-23 | Ricoh Co Ltd | Light emitting diode |
-
1985
- 1985-05-22 JP JP1985075873U patent/JPH0538944Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136379A (en) * | 1981-02-17 | 1982-08-23 | Ricoh Co Ltd | Light emitting diode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61196041U (en) | 1986-12-06 |
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