JPH01300273A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPH01300273A
JPH01300273A JP63130860A JP13086088A JPH01300273A JP H01300273 A JPH01300273 A JP H01300273A JP 63130860 A JP63130860 A JP 63130860A JP 13086088 A JP13086088 A JP 13086088A JP H01300273 A JPH01300273 A JP H01300273A
Authority
JP
Japan
Prior art keywords
light emitting
light emission
emitting diode
diode array
emission diode
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
JP63130860A
Other languages
Japanese (ja)
Inventor
Mineo Oyama
大山 峰夫
Hokyo Tsuji
辻 保享
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP63130860A priority Critical patent/JPH01300273A/en
Publication of JPH01300273A publication Critical patent/JPH01300273A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To extend a service life of a light emission diode array by constituting the device so that the light emission time of a light emission diode element does not become partial to some light emission diodes. CONSTITUTION:A light emission diode array 3 moves in the rotation axis direction of a photosensitive body 1 by a rotation of a position control motor 4, and a moving amount at the time when the light emission diode array 3 has been moved is measured by a position detecting sensor 7. This moving amount is fed back to a light emission diode array control driver 5 through a position correcting circuit 6, and a lighting place of a light emission diode is corrected. In such a way, a position of the light emission diode array is shifted in the rotation axis direction of the photosensitive body, and write of a frame line is shared with other light emission diode element, as well. In such a way, a long service life of the light emission diode array can be realized.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、画像形成用書込みに発光ダイオードアレイを
用いた電子写真装置に係り、さらに詳細には、発光ダイ
オードアレイの長寿命化をはかった電子写真装置の改良
に関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrophotographic device that uses a light emitting diode array for writing for image formation, and more specifically relates to an electrophotographic device that uses a light emitting diode array for writing for image formation. This invention relates to improvements in electrophotographic devices.

〔従来の技術〕[Conventional technology]

電子写真装置の画像形成用g込みに使用される発光ダイ
オードアレイは、1インチ当り約240個またはそれ以
上のダイオード素子が、約8インチ〜約15インチ並ん
だものであり、各発光ダイオード素子を点燈させたり消
燈させることにより、感光体上に画像の潜像を形成する
。しかして。
A light emitting diode array used for image forming in an electrophotographic device has about 240 or more diode elements arranged in a row of about 8 inches to about 15 inches per inch. By turning on and off the light, a latent image is formed on the photoreceptor. However.

印刷幅が8インチの小型電子写真’!Anに用いられる
発光ダイオードアレイでも、1920個以上の発光ダイ
オード素子を持っており、この中の1つでも故障または
寿命等により発光しなくなると。
A small electronic photo with a printing width of 8 inches! The light emitting diode array used in An has more than 1,920 light emitting diode elements, and even one of them may stop emitting light due to failure or lifespan.

その部分だけ白抜け(反転現像のとき)、または黒筋(
正規現像)を発生する。このような不都合が生じた場合
、従来一般には、発光ダイオードアレイを1セツトごと
そっくり交換するようにしており、その場合、発光ダイ
オードアレイの寿命は、当該発光ダイオードアレイの中
で一番寿命の短かい発光ダイオード素子の寿命時間とな
る。
White spots (when using reversal development) or black streaks (
regular development). When such a problem occurs, the conventional practice is to replace the entire set of light emitting diode arrays. This is the lifespan of the light emitting diode element.

一方、発光ダイオードの寿命は、半導体レーザと同様、
点燈時間で決められる。発光ダイオード素子のバラツキ
もあるが、平均的には、点燈時間の1ヘータル量が成る
値にまで至ると、発光はの極端な低下や発光不良を生じ
、寿命となる。すなわち、頻繁に点燈するものは、点燈
時間のトータル量がすぐに増え、寿命となる。逆に、め
ったに点燈しないものは、なかなか寿命とならず、これ
らのことから、発光ダイオードアレイの寿命は、そのア
レイの中で最も長く点燈している発光ダイオード素fの
発光1−一タル時間によって決まることになる。そして
、従来、発光ダイオードアレイを用いた電子−写真装置
あっては、点燈時間が少なくなるよう、反転FJl像方
式を採るのが一般的である〔発明が解決しようとする課
題〕 ところで、発光ダイオードアレイを用いた電子写真に置
は、コンピュータ端末の出力装置としてよく利用され、
その場合、コンピュータのユーザごとに出力形式、国粋
等を定めて、決められた国粋にしたがって大量の印刷が
おこなわれるが(第2図参照)、この囲枠の中で、感光
体の回転軸と垂直な方向の枠線を書き込む発光ダイオー
ド素子は、他の素子に比へて、極端に点燈時間が長くな
ることになる。このため、枠線を印刷する発光ダイオー
ド素子が早く寿命となり、前記したように、発光ダイオ
ード7レイとしての寿命も短くなる本発明の目的は、前
記した従来技術の欠点をなくシ1発光ダイオード素子の
発光時間が一部の発光ダイオードに偏るのを防いで、発
光ダイオードアレイの寿命を延ばすことのできる。改良
された電子写真装置を提供することにある。
On the other hand, the lifespan of a light emitting diode is similar to that of a semiconductor laser.
It is determined by the lighting time. Although there are variations in the light emitting diode elements, on average, when the lighting time reaches a value of 1 hetar, the light emission becomes extremely low or light emission failure occurs, and the life of the light emitting diode is reached. In other words, for items that are turned on frequently, the total amount of time they are turned on increases quickly, and the lamp life reaches the end. On the other hand, a light emitting diode array that rarely lights up has a short lifespan.For these reasons, the lifespan of a light emitting diode array is determined by the amount of light emitted by the light emitting diode element f that is lit for the longest time in the array. It will be determined by time. Conventionally, in an electrophotographic device using a light emitting diode array, it has been common to adopt an inverted FJl image method in order to reduce the lighting time.[Problem to be solved by the invention] Electrophotography using diode arrays is often used as an output device for computer terminals.
In this case, the output format, national identity, etc. are determined for each computer user, and a large amount of printing is performed according to the determined national identity (see Figure 2). A light emitting diode element that writes a frame line in a vertical direction has an extremely long lighting time compared to other elements. For this reason, the life of the light emitting diode element on which the frame line is printed is shortened, and the life of the light emitting diode element as described above is also shortened. The life of the light emitting diode array can be extended by preventing the light emitting time from being concentrated on some light emitting diodes. An object of the present invention is to provide an improved electrophotographic device.

〔課題を解決するための手段〕[Means to solve the problem]

前記目的は、発光ダイオードアレイを1列または複数列
用いて各発光ダイオードを点燈・清澄させることにより
、感光体−Lに画像の潜像を形成する電子写真装置にお
いて、前記発光ダイオ−、ドアレイの取付位置を、感光
体の回転軸方向に移動成分を持って移動せしめる手段を
具備することによって達成される。
The purpose is to provide an electrophotographic apparatus that uses one or more rows of light emitting diode arrays to form a latent image on a photoreceptor L by lighting and clarifying each light emitting diode. This is achieved by providing means for moving the mounting position of the photoreceptor with a moving component in the direction of the rotation axis of the photoreceptor.

〔作用〕[Effect]

しかして、前記構成よりなる本発明によれば、画像形成
用り込みに発光ダイオードを用いる電子写真装置におい
て、発光ダイオードアレイの位置を感光体の回転軸方向
にズラすことにより、感光体の回転軸と市直な方向の枠
線の書き込みを、成る特定の発光ダイオード素子にのみ
負担させることなく、他の発光ダイオード素子にも分担
させて、発光ダイオードアレイの長寿命化をはかること
ができる。
According to the present invention having the above configuration, in an electrophotographic apparatus that uses light emitting diodes for image formation, the rotation of the photoreceptor can be controlled by shifting the position of the light emitting diode array in the direction of the rotation axis of the photoreceptor. It is possible to extend the life of the light emitting diode array by having other light emitting diode elements share the burden of writing the frame line in the direction perpendicular to the axis, without having to burden only a specific light emitting diode element.

〔実施例〕〔Example〕

以下、本発明を、図面の一実施例にもとづいて説明する
と、第1図は本発明の要部である発光ダイオードアレイ
3の1駆動系説明図、第2図は電子写真装置の出力図、
第3図(1)〜(3)はいずれも発光ダイオードアレイ
3の発光部と印刷用紙8の印刷部との関係を模式的に示
す図である。第1図において、発光ダイオ−1−アレイ
3は、位置制御モータ4の回転によって感光体1の回転
軸方向に移動する。発光ダイオードアレイ3を移動した
ときの移動量は位置検出センサ7によって計測される。
Hereinafter, the present invention will be explained based on one embodiment of the drawings. FIG. 1 is an explanatory diagram of one drive system of a light emitting diode array 3 which is the main part of the present invention, FIG. 2 is an output diagram of an electrophotographic device,
3(1) to 3(3) are diagrams schematically showing the relationship between the light emitting section of the light emitting diode array 3 and the printing section of the printing paper 8. FIG. In FIG. 1, the light emitting diode 1-array 3 is moved in the direction of the rotation axis of the photoreceptor 1 by the rotation of the position control motor 4. As shown in FIG. The amount of movement of the light emitting diode array 3 is measured by the position detection sensor 7.

なお、発光ダイオードアレイ3の移動にともなって印刷
位置がズレる場合があり得るが、これに対しては1位置
検出センサ7によって計測した移動量を1位置補正回路
6を経由して、発光ダイオードアレイ制御ドライバ5に
フィードバックし、発光ダイオードの点燈場所を補正す
ればよい。
Note that the printing position may shift as the light emitting diode array 3 moves, but in this case, the amount of movement measured by the 1 position detection sensor 7 is sent to the light emitting diode array via the 1 position correction circuit 6. What is necessary is to feed back to the control driver 5 and correct the lighting location of the light emitting diode.

ここで、以上の手j須によって第2図に示す国粋を印刷
している場合に、その途中で発光ダイオードが移り変わ
る様子を第3図を用いて説明する4゜すなわち、第3図
の(1)において、発光ダイオードアレイ3中の発光ダ
イオード素子6番、7番が国粋10を印刷していた場合
、第3図の(2)に示すように、発光ダイオードアレイ
3をズラし、この発光ダイオードアレイ3の移動にとも
な。
Here, when printing the national identity shown in Figure 2 using the above procedure, we will use Figure 3 to explain how the light emitting diodes change during printing. ), if the light emitting diode elements No. 6 and 7 in the light emitting diode array 3 are printed with Kokusui 10, the light emitting diode array 3 is shifted as shown in (2) in Fig. 3, and this light emitting diode Along with the movement of array 3.

て印刷位置にズレ量を生じた場合には、そのズレ量を補
正して、第3図の(3)に示すように、発光ダイオード
素子2番、3洛に国粋10の印刷担当を移し変える。そ
して、前記発光ダイオードアレイ3の位置を周期的にズ
ラすことにより、囲枠1oの印刷に要する露光時間を、
成る限られた−部の発光ダイオード素子にのみ負担させ
ることなく、発光ダイオード素子全体として分散させて
、発光ダイオードの最低寿命を従来よりも大幅に引き延
ばすことができ、その結果として、発光ダイオードアレ
イとしての寿命をも引き延ばすことができる。なお、発
光ダイオードアレイ3の最低移動量は、国粋10の太さ
ごとに変わるものであるが1口枠10を3トツ1−の幅
て描いている場合は、例えば、3ドツト以りの移動を一
度におこない、また国粋10が5ドツト幅であれば、5
ドツト以上の移動を一度におこなうことが具体的に考え
られる。また1図示実施例においては1発光ダイオード
アレイ3のみが、移動する場合について例示したが、一
般には1発光ダイオードアレイ3とセルホックレンズア
レイ2とが一体となっていることが多いので、このよう
な場合には、発光ダイオードアレイ3とセルホックレン
ズアレイ2とを一体的に移動させればよい。
If a misalignment occurs in the printing position, correct the misalignment and transfer the printing responsibility for Kokusui 10 to light emitting diode elements No. 2 and 3, as shown in (3) in Figure 3. . By periodically shifting the position of the light emitting diode array 3, the exposure time required to print the surrounding frame 1o is
By distributing the burden on the light emitting diode elements as a whole instead of placing the burden on only a limited number of light emitting diode elements, the minimum lifespan of the light emitting diode can be significantly extended compared to the conventional one.As a result, the light emitting diode array It can also extend the lifespan of. Note that the minimum amount of movement of the light emitting diode array 3 varies depending on the thickness of the national 10, but if the one-port frame 10 is drawn with a width of 3 dots and 1-, for example, the minimum amount of movement of the light emitting diode array 3 will be , and if Kokusui 10 is 5 dots wide, then 5
Specifically, it is possible to move more than one dot at a time. In addition, in the illustrated embodiment, only one light emitting diode array 3 is moved, but generally, one light emitting diode array 3 and the cell-hoc lens array 2 are often integrated, so In such a case, the light emitting diode array 3 and the cell-hock lens array 2 may be moved integrally.

〔発明の効果〕〔Effect of the invention〕

本発明は以上のごときであり、図示実施例の説明からも
明らかなように、本発明によれば、発光ダイオード素子
の発光時間が一部の発光ダイオードに偏るのを防いで、
発光ダイオ−1ヘアレイの寿命を延ばすことのできる、
改良された電r−写]゛〔装置を提供することができる
The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, the light emission time of the light emitting diode elements is prevented from being concentrated in some light emitting diodes,
Light emitting diode-1 can extend the lifespan of the hair light.
An improved electrophotographic apparatus can be provided.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例を示し、第1図は本発明の要部
である発光ダイオードアレイ3の開動系説明図、第2図
は電子写真装置の出力図、第3図(1)〜(3)はいず
れも発光ダイオ−1−アレイ3の発光部と印刷用紙8の
印刷部との関係を模式%式% 1は感光体、2はセルホックレンズアレイ、3は発光ダ
イオードアレイ、4は位置制御モータ、5は発光ダイオ
ードアレイ制御ドライバ、6は位置補正回路、7は位置
検出センサ。 特許出願人の名称 日立工機株式会社 オf乙 第2■ ヤゴ図
The drawings show an embodiment of the present invention; FIG. 1 is an explanatory diagram of the opening and operating system of the light emitting diode array 3, which is the main part of the present invention, FIG. 2 is an output diagram of the electrophotographic device, and FIGS. (3) is a schematic representation of the relationship between the light emitting part of the light emitting diode 1-array 3 and the printing part of the printing paper 8. 1 is the photoreceptor, 2 is the cell-hoc lens array, 3 is the light emitting diode array, 4 5 is a position control motor, 5 is a light emitting diode array control driver, 6 is a position correction circuit, and 7 is a position detection sensor. Name of patent applicant Hitachi Koki Co., Ltd.

Claims (1)

【特許請求の範囲】 1、発光ダイオードアレイを1列または複数列用いて各
発光ダイオードを点燈・消燈させることにより、感光体
上に画像の潜像を形成する電子写真装置において、前記
発光ダイオードアレイの取付位置を、感光体の回転軸方
向に移動成分を持って移動せしめる手段を具備すること
を特徴とする電子写真装置。 2、特許請求の範囲第1項記載の発明において、発光ダ
イオードアレイの位置を周期的に移動させる手段を具備
した電子写真装置。
[Scope of Claims] 1. In an electrophotographic apparatus in which a latent image of an image is formed on a photoreceptor by using one or more rows of light emitting diode arrays and turning on and off each light emitting diode, the light emitting An electrophotographic apparatus comprising means for moving a mounting position of a diode array with a moving component in the direction of a rotation axis of a photoreceptor. 2. An electrophotographic apparatus according to the invention as set forth in claim 1, comprising means for periodically moving the position of the light emitting diode array.
JP63130860A 1988-05-27 1988-05-27 Electrophotographic device Pending JPH01300273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63130860A JPH01300273A (en) 1988-05-27 1988-05-27 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63130860A JPH01300273A (en) 1988-05-27 1988-05-27 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPH01300273A true JPH01300273A (en) 1989-12-04

Family

ID=15044391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63130860A Pending JPH01300273A (en) 1988-05-27 1988-05-27 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPH01300273A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102681391A (en) * 2011-03-11 2012-09-19 佳能株式会社 Color image forming apparatus
JPWO2020059726A1 (en) * 2018-09-18 2021-06-10 富士フイルム株式会社 A hard coat composition, a hard coat film, an article having a hard coat film, an image display device, and a method for manufacturing the hard coat film.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102681391A (en) * 2011-03-11 2012-09-19 佳能株式会社 Color image forming apparatus
US8831444B2 (en) 2011-03-11 2014-09-09 Canon Kabushiki Kaisha Color image forming apparatus
JPWO2020059726A1 (en) * 2018-09-18 2021-06-10 富士フイルム株式会社 A hard coat composition, a hard coat film, an article having a hard coat film, an image display device, and a method for manufacturing the hard coat film.

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