JPH0624253B2 - LED head - Google Patents
LED headInfo
- Publication number
- JPH0624253B2 JPH0624253B2 JP18641685A JP18641685A JPH0624253B2 JP H0624253 B2 JPH0624253 B2 JP H0624253B2 JP 18641685 A JP18641685 A JP 18641685A JP 18641685 A JP18641685 A JP 18641685A JP H0624253 B2 JPH0624253 B2 JP H0624253B2
- Authority
- JP
- Japan
- Prior art keywords
- converging
- transmission body
- led
- led array
- holder
- 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
- 230000003287 optical effect Effects 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 20
- 230000017525 heat dissipation Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000006059 cover glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Electronic Switches (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Led Device Packages (AREA)
- Led Devices (AREA)
- Dot-Matrix Printers And Others (AREA)
Description
【発明の詳細な説明】 (a)技術分野 この発明は、光プリンタにおいて発光素子として使用さ
れるＬＥＤヘッドに関する。Description: (a) Technical Field The present invention relates to an LED head used as a light emitting element in an optical printer.
(b)従来技術 ＬＥＤを発光素子とした光プリンタには、光学系として
集束性光伝送体（商標名「セルフォックレンズ」）を使
用したものがある。この集束性光伝送体は、第４図に示
すように、ＬＥＤアレイの発光部２と感光体３との間隔
を規定の物体像面間距離ＴＣとし、この発光部２および
感光体表面３との間隔距離が等しくｌ０となるように配
置しなければ所定の解像力を得ることができない。この
ため従来は、光プリンタの製造組立段階において、ＬＥ
Ｄアレイ１，感光体表面３および集束性光伝送体４の位
置関係を調節する必要があり、組立調整の工数が増加す
るとともに高精度な調整が困難であるという欠点を有し
ていた。(b) Prior Art Some optical printers using LEDs as light emitting elements use a converging optical transmission body (trade name “SELFOC lens”) as an optical system. As shown in FIG. 4, in this converging light transmission body, the distance between the light emitting portion 2 of the LED array and the photoconductor 3 is set as a prescribed object image plane distance TC, and the light emitting portion 2 and the photoconductor surface 3 are to be placed so that the distance the distance becomes equal l 0 can not obtain a predetermined resolution. For this reason, in the past, at the manufacturing and assembling stage of an optical printer, LE was used.
Since it is necessary to adjust the positional relationship among the D array 1, the photosensitive member surface 3 and the converging light transmitting member 4, there are drawbacks that the number of steps for assembling and adjusting increases and high-precision adjustment is difficult.
(c)発明の目的 この発明は、このような事情に鑑みなされたものであっ
て、ＬＥＤアレイと集束性光伝送体を予めホルダを介し
て放熱板に位置決め固定して置くことにより、光プリン
タを組み立てる際の調整の煩わしさを軽減することがで
きるＬＥＤヘッドを提供することを目的とする。(c) Object of the Invention The present invention has been made in view of the above circumstances, and an optical printer is provided by previously positioning and fixing the LED array and the converging optical transmission member on a heat dissipation plate via a holder. An object of the present invention is to provide an LED head that can reduce the troublesomeness of adjustment when assembling the LED.
(d)発明の構成および効果 この発明のＬＥＤヘッドは、放熱板上に取りつけたＬＥ
Ｄアレイと、このＬＥＤアレイの両側部に位置する前記
放熱板上に取り付けたホルダと、このホルダに両端部が
固定された集束性光伝送体とを備え、前記ホルダおよび
集束性光伝送体の両端部は、該集束性光伝送体の光軸距
離の中心と前記ＬＥＤアレイの発光との間隔が所定値と
なる形状に設定されていることを特徴とする。(d) Structure and Effect of the Invention The LED head of the present invention is an LE mounted on a heat sink.
A D array, a holder mounted on the heat radiating plate located on both sides of the LED array, and a converging light transmission body having both ends fixed to the holder, are provided for the holder and the converging light transmission body. Both end portions are characterized in that the distance between the center of the optical axis distance of the converging light transmission body and the light emission of the LED array is set to a predetermined value.
この発明のＬＥＤヘッドを上記のように構成すると、Ｌ
ＥＤアレイと集束性光伝送体との位置関係がホルダおよ
び放熱板の機械精度により定まり、しかも微調整が部品
段階で行うことができるので、高精度の調整を容易に行
うことが可能となる。このため、光プリンタの製造組立
段階においては、このＬＥＤヘッドと感光体表面との位
置関係のみを調整すればよいことになるので、調整作業
が容易となり、且つ作業工数の削減を行うことができ
る。したがって、この発明のＬＥＤヘッドは、光プリン
タの製造コストの低減化および高精度化による印字品質
の向上に貢献することができる。When the LED head of the present invention is constructed as described above, L
Since the positional relationship between the ED array and the converging optical transmission body is determined by the mechanical accuracy of the holder and the heat dissipation plate, and fine adjustment can be performed at the component stage, highly accurate adjustment can be easily performed. Therefore, at the manufacturing and assembling stage of the optical printer, only the positional relationship between the LED head and the surface of the photoconductor needs to be adjusted, which facilitates the adjustment work and reduces the number of work steps. . Therefore, the LED head of the present invention can contribute to the reduction of the manufacturing cost of the optical printer and the improvement of the printing quality due to the higher accuracy.
また、ホルダおよび集束性光伝送体の両端部は、該集束
性光伝送体の光軸距離の中心とＬＥＤアレイの発光部と
の間隔が所定値となる形状に設定されているため、集束
性光伝送体の配置位置がより正確なものとなる。Further, since both ends of the holder and the converging light transmitting body are set in a shape such that the distance between the center of the optical axis distance of the converging light transmitting body and the light emitting portion of the LED array is set to a predetermined value, the converging property is improved. The arrangement position of the optical transmission body becomes more accurate.
(e)実施例 第１図は、この発明の実施例であるＬＥＤヘッドの平面
図、第２図は、同ＬＥＤヘッドの正面図、第３図は、Ｌ
ＥＤヘッドの拡大左側面図である。(e) Embodiment FIG. 1 is a plan view of an LED head which is an embodiment of the present invention, FIG. 2 is a front view of the LED head, and FIG.
It is an enlarged left side view of an ED head.
この発明のＬＥＤヘッドは、ＬＥＤアレイ１，放熱板
５，集束性光伝送体４およびホルダ６から構成されてい
る。ＬＥＤアレイ１は、多数のＬＥＤ素子を一例に配列
することにより、発光部２としたものである。加熱板５
は、ＬＥＤアレイ１が発した熱を放出するための、アル
ミニュウム等からなる長い板である。ＬＥＤアレイ１
は、この放熱板５上の一方の長辺側に沿うようにして配
置される。尚、この放熱板５上には、ＬＥＤアレイ１の
内側に駆動用ＩＣ７が配置され、さらにこれらの上方を
カバーガラス８で覆っている。このカバーガラス８は、
内部にチッ素ガス等の不活性ガスを充填し、周囲を樹脂
材９で封止することにより、ＬＥＤ素子や配線を保護す
るためのものである。また、この放熱板５の他方側は駆
動用ＩＣ７の配線をフレキシブルケーブルとして引き出
し、この上方をカバー１０で覆い保護している。フレキ
シブルケーブルの端部は放熱板の裏面に突出して設けら
れたコネクタ１１に接続されている。ホルダ６，６は、
放熱板５の長手方向の両端にボルト１２で確実に締め付
け固定される。このホルダ６は、放熱板５に取り付けら
れた状態で、上方に設けられたレンズ取り付け部の上向
き面１３と、同じく放熱板５に取り付けられたＬＥＤア
レイ１の発光部２との高さ位置関係が所定距離となるよ
うに高精度に加工されている。集束性光伝送体４は、両
端部をこのレンズ取り付け部の上向き面１３上に載置
し、ＬＥＤアレイ１の発光部２上方を覆うようにしてホ
ルダ６に締め付け固定されている。尚、この集束性光伝
送体４の両端部には機械加工により切り込み１５が設け
られ、この切り込み１５の下端面とホルダ６のレンズ取
り付け部の上向き面１３とが接するようになっている。
集束性光伝送体４の両端部にこのような切り込み１５を
設けるのは、この集束性光伝送体が多数のオプティカル
ファイバを並べ樹脂材で固めたものであることから、第
４図における、端面間の距離ｌ０によって位置決めする
よりも集束性光伝送体の光軸距離の中心とＬＥＤアレイ
１の発光部２との間隔距離が物体像面間距離ＴＣの半分
になるように位置決めする方がより正確に配置できるか
らである。このため、この切り込み１５の下端面は、集
束性光伝送体４の光軸距離の中心から所定距離となるよ
うに精密に加工される。The LED head of the present invention comprises an LED array 1, a heat sink 5, a converging light transmitter 4 and a holder 6. The LED array 1 serves as the light emitting unit 2 by arranging a large number of LED elements as an example. Heating plate 5
Is a long plate made of aluminum or the like for releasing the heat generated by the LED array 1. LED array 1
Are arranged along one long side of the heat dissipation plate 5. A drive IC 7 is arranged inside the LED array 1 on the heat dissipation plate 5, and a cover glass 8 covers the upper part thereof. This cover glass 8
The inside is filled with an inert gas such as nitrogen gas, and the periphery is sealed with a resin material 9 to protect the LED element and the wiring. On the other side of the heat dissipation plate 5, the wiring of the driving IC 7 is drawn out as a flexible cable, and the upper side is covered with a cover 10 for protection. The end of the flexible cable is connected to a connector 11 provided so as to project on the back surface of the heat sink. Holders 6 and 6 are
Bolts 12 are securely fastened and fixed to both ends of the heat dissipation plate 5 in the longitudinal direction. The holder 6 is attached to the heat dissipation plate 5, and the height positional relationship between the upward surface 13 of the lens attachment portion provided above and the light emitting portion 2 of the LED array 1 that is also attached to the heat dissipation plate 5. Is processed with high precision so that the distance becomes a predetermined distance. Both ends of the converging light transmission body 4 are placed on the upward surface 13 of the lens mounting portion, and the focusing light transmission body 4 is fastened and fixed to the holder 6 so as to cover the light emitting portion 2 of the LED array 1. A notch 15 is provided on both ends of the converging optical transmission body 4 by machining, and the lower end surface of the notch 15 and the upward surface 13 of the lens mounting portion of the holder 6 are in contact with each other.
Providing such cuts 15 at both ends of the converging optical transmission member 4 is because the converging optical transmission member has a large number of optical fibers arranged and solidified with a resin material. It is better to position so that the distance between the center of the optical axis distance of the converging light transmitter and the light emitting portion 2 of the LED array 1 is half the object-image-plane distance TC than the distance l 0 . This is because it can be arranged more accurately. Therefore, the lower end surface of the notch 15 is precisely processed so as to be a predetermined distance from the center of the optical axis distance of the converging light transmission body 4.
上記のように構成されたこの実施例のＬＥＤヘッドは、
ＬＥＤアレイ１の発光部２と集束性光伝送体４との位置
関係が、放熱板５およびホルダ６を介した機械精度によ
り定まるので、面倒な組立調整作業が不要となる。この
ため、光プリンタの製造組立の際にはこのＬＥＤヘッド
の集束性光伝送体４と感光体表面との間隔距離を所定の
値となるように調整すれば良いので、光プリンタの組立
調整の工数を削減し、しかも安定した精度の高い製品を
得ることができ、製品のコストダウンとともに品質の向
上に貢献することができる。The LED head of this embodiment configured as described above is
Since the positional relationship between the light emitting section 2 of the LED array 1 and the converging light transmission body 4 is determined by the mechanical accuracy via the heat dissipation plate 5 and the holder 6, troublesome assembly and adjustment work is unnecessary. Therefore, at the time of manufacturing and assembling the optical printer, it is sufficient to adjust the distance between the converging optical transmission body 4 of the LED head and the surface of the photoconductor to a predetermined value. It is possible to reduce the number of steps and obtain a stable and highly accurate product, which contributes to the cost reduction of the product and the improvement of the quality.
第１図は、この発明の実施例であるＬＥＤヘッドの平面
図、第２図は、同ＬＥＤヘッドの正面図、第３図は、同
ＬＥＤヘッドの拡大左側面図、第４図は、光プリンタに
おける集束性光伝送体の配置を説明するための正面図で
ある。 １……ＬＥＤアレイ、２……発光部、 ４……集束性光伝送体、５……放熱板、 ６……ホルダ。FIG. 1 is a plan view of an LED head which is an embodiment of the present invention, FIG. 2 is a front view of the LED head, FIG. 3 is an enlarged left side view of the LED head, and FIG. It is a front view for explaining the arrangement of the converging light transmission body in the printer. 1 ... LED array, 2 ... light emitting part, 4 ... convergent light transmitting body, 5 ... radiating plate, 6 ... holder.
Claims (1)
のＬＥＤアレイの両側部に位置する前記放熱板上に取り
付けたホルダと、このホルダに両端部が固定された集束
性光伝送体とを備え、前記ホルダおよび集束性光伝送体
の両端部は、該集束性光伝送体の光軸距離の中心と前記
ＬＥＤアレイの発光部との間隔が所定値となる形状に設
定されていることを特徴とするＬＥＤヘッド。1. An LED array mounted on a heat radiating plate, holders mounted on the heat radiating plate on both sides of the LED array, and a converging optical transmission body having both ends fixed to the holder. The holder and the both ends of the converging light transmission body are set to have a shape such that the distance between the center of the optical axis distance of the converging light transmission body and the light emitting portion of the LED array becomes a predetermined value. Characteristic LED head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18641685A JPH0624253B2 (en) | 1985-08-23 | 1985-08-23 | LED head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18641685A JPH0624253B2 (en) | 1985-08-23 | 1985-08-23 | LED head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6246578A JPS6246578A (en) | 1987-02-28 |
| JPH0624253B2 true JPH0624253B2 (en) | 1994-03-30 |
Family
ID=16188038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18641685A Expired - Lifetime JPH0624253B2 (en) | 1985-08-23 | 1985-08-23 | LED head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624253B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01157354U (en) * | 1988-04-20 | 1989-10-30 | ||
| JPH0288752U (en) * | 1988-12-28 | 1990-07-13 | ||
| JP3007199B2 (en) * | 1991-09-30 | 2000-02-07 | ローム株式会社 | LED head |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036612U (en) * | 1983-08-19 | 1985-03-13 | スタンレー電気株式会社 | Head for light emitting device printer |
| JPS6048384A (en) * | 1983-08-26 | 1985-03-16 | Ricoh Co Ltd | LED array head |
| JPS6053555U (en) * | 1983-09-21 | 1985-04-15 | 沖電気工業株式会社 | Optical print head structure |
-
1985
- 1985-08-23 JP JP18641685A patent/JPH0624253B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6246578A (en) | 1987-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20050074046A1 (en) | Light emitting device | |
| KR20000023098A (en) | Multi-beam scanning apparatus | |
| US5570122A (en) | Combined read and print head | |
| JPH0624253B2 (en) | LED head | |
| JPH06344596A (en) | Image forming device | |
| EP0790132B1 (en) | Optical print head | |
| EP1296316B1 (en) | Image recorder and light source unit | |
| EP0595502B1 (en) | Semiconductor optical apparatus having an improved precision for the optical beam position | |
| JPH09226167A (en) | Method of manufacturing line light source device, line light source device, and image recording apparatus using the line light source device | |
| JPS61189965A (en) | Optical printing head | |
| JPH034528Y2 (en) | ||
| JPH07195734A (en) | Led printing head | |
| US5495277A (en) | Image sensor having a first light receptor substrate and a substrate with electronics mounted against the first substrate | |
| JPS63199380A (en) | Optical printer | |
| JPH02134260A (en) | optical printer head | |
| JP2944090B2 (en) | Optical print head | |
| KR100462254B1 (en) | A position-control structure for collimate lens | |
| JPH05136952A (en) | Injection optics | |
| US5133612A (en) | Dot impact type printing head with adhesively attached base unit | |
| JP2919474B2 (en) | Optical print head | |
| JP3762321B2 (en) | Optical writing head | |
| JP2004096001A (en) | Light source device | |
| JPH05162386A (en) | Led array head | |
| JP2866519B2 (en) | Imaging device | |
| JPH09197236A (en) | Lens height adjusting device |