JPS6172268A - Electrostatic recording device - Google Patents

Electrostatic recording device

Info

Publication number
JPS6172268A
JPS6172268A JP19550684A JP19550684A JPS6172268A JP S6172268 A JPS6172268 A JP S6172268A JP 19550684 A JP19550684 A JP 19550684A JP 19550684 A JP19550684 A JP 19550684A JP S6172268 A JPS6172268 A JP S6172268A
Authority
JP
Japan
Prior art keywords
photoreceptor
current
temperature
charging
copy
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
JP19550684A
Other languages
Japanese (ja)
Inventor
Hidetoshi Usui
碓氷 秀敏
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP19550684A priority Critical patent/JPS6172268A/en
Publication of JPS6172268A publication Critical patent/JPS6172268A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/02Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266Arrangements for controlling the amount of charge

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To cope with delicate temperature change of a photosensitive body by changing the level of charge current or charge voltage that becomes the base by a specified function for a photosensitive body or its ambient temperature one the basis of the number of copies or corresponding time information. CONSTITUTION:A temperature sensor 5 is provided close to the photosensitive body 1a to detect the temperature of a photosensitive body 1a. Detected temperature is converted by a controlling section A, and reference current to a charger 2 is set. On the other hand, a controlling section B changes current coefficient according to the number of copies of continuous copy from a copy counter. As the controlling section B is provided with a timer, it measures time from the time of completion when the continuous copy is completed, and makes it a factor to determine the value of current when starting next copy. Such combined control is started when a main switch is turned off. Needless to say, the timer can be operated after the main switch is turned off and the factor of a current value at the time of starting next copy is obtained according to the counted value.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、感光体コロナ放電によって一様に帯電し、帯
電面を露光して静電潜像を形成し、現像したのち転写紙
上に転写して画像記録を行うようにした静電記録装置に
関するもので、特に感光体の疲労による記録画質の変動
をなくすようにした静電記録装置に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention involves uniformly charging a photoreceptor by corona discharge, exposing the charged surface to light to form an electrostatic latent image, developing it, and then transferring it onto a transfer paper. The present invention relates to an electrostatic recording device that records images, and particularly relates to an electrostatic recording device that eliminates fluctuations in recorded image quality due to fatigue of a photoreceptor.

〔従来技術〕[Prior art]

感光体を用いた静電記録装置にあってGオ、繰り返しコ
ピーを行うと感光体の疲労が問題となる。
In an electrostatic recording device using a photoreceptor, fatigue of the photoreceptor becomes a problem when repeated copying is performed.

特に高感度のSe系の感光体においてはこの疲労が顕著
に認められる。感光体の疲労の代表的なものとして、非
露光部の帯電電位の低下や、露光部での残留電位の上昇
がある。非露光部の帯電電位の低下は、コピーについて
画像部の6度低下となるので好ましくない。
This fatigue is particularly noticeable in high-sensitivity Se-based photoreceptors. Typical examples of photoreceptor fatigue include a decrease in the charging potential in non-exposed areas and an increase in residual potential in exposed areas. A decrease in the charging potential of the non-exposed area is undesirable because it results in a 6 degree decrease in the image area for copying.

之に対して、感光体の表面電位を電位計で測定して感光
体を帯電させる帯電器の帯電電流を制御する方法は、特
開昭50−20731号公報をはじめ多くの公知例が見
られるが、電位計を組みこむことは、コスト高となる欠
点がある。更に電位計に必要とするプローブ(検知器)
を設ける位置はし元部と現像部との間になるため、飛散
したトナーで汚れたり、高湿度に於ける信頼性に不安が
あり、精度は低いものとなる。
On the other hand, there are many known examples of methods for controlling the charging current of a charger that charges the photoreceptor by measuring the surface potential of the photoreceptor with an electrometer, including JP-A-50-20731. However, incorporating an electrometer has the disadvantage of high cost. Furthermore, the probe (detector) required for the electrometer
Since the position is between the print head and the developing section, there are concerns about reliability in high humidity and dirt caused by scattered toner, resulting in low accuracy.

また他の例としてはコピーサイクルの初期に疲労プロセ
ス号設けて見掛は上疲労が少なくなるようにしたり、使
用する感光体の電位低下の規格を厳しくしたりして対処
したりしている。
Other examples include providing a fatigue process indicator at the beginning of the copy cycle to reduce the apparent fatigue, or by tightening the standards for the potential drop of the photoreceptor used.

上記欠点から、特開昭56−72456号公報のように
5.コピー数、停止時間の情報を積分して適切な電流値
にコロナ放電を制御する方法が提案されている。この方
法は前記の方法に較べて好ましい手段と考えられるが、
実用上はここまで厳密なフントロールを必要としない場
合が多く、感光体の性能の量産的なバラツキを考慮する
とオーバーアクションとなる懸念さえある。また感光体
周辺温度の変化に起因する電位低下をも考慮すると、ロ
ジック的な制御は相当複雑になる欠点を有している。
Due to the above drawbacks, 5. A method has been proposed for controlling corona discharge to an appropriate current value by integrating information on copy number and stop time. Although this method is considered more preferable than the above-mentioned method,
In practice, there are many cases where such a strict control is not required, and there is even a concern that overaction may occur, considering the dispersion in the performance of photoreceptors during mass production. Furthermore, if a potential drop due to a change in the temperature around the photoreceptor is taken into consideration, logical control has the disadvantage of becoming considerably complicated.

本発明者はここで、単純な制御によって、連続記録によ
る疲労のために感光体の帯1!電位が低下してくる問題
を解決するようにした静電記録装首企提供することを目
的として特願昭59−85864号提案3行っている。
The inventors here discovered that by simple control, due to fatigue due to continuous recording, the photoreceptor strip 1! Japanese Patent Application No. 59-85864 was proposed 3 with the aim of providing an electrostatic recording device which would solve the problem of potential drop.

この提案は、感光体コロナ放電で一様に帯電し、帯電面
を露光して静電潜像を形成する静電記録装置において、
予め設定した記録数あるいはそれに相当する時間の経過
後、前記帯電を行う帯電電流又は帯電電圧を切替えるよ
うにしたことご特徴とする静電記録装置を提供するもの
である。
This proposal is based on an electrostatic recording device in which a photoreceptor is uniformly charged by corona discharge and the charged surface is exposed to light to form an electrostatic latent image.
The present invention provides an electrostatic recording device characterized in that the charging current or charging voltage for performing the charging is switched after a preset number of recordings or a period of time corresponding thereto has elapsed.

この提案は感光体の表面電位企測定するプローブを装置
内に組み込む必要がなく、簡単なロジックで制御3行う
ようにした特長B有するものであるが、その反面上記提
案では感光体またはその周囲温度の上昇による帯電電位
低下に対する補正をマトリ、クスで行っているので、キ
メの細かい制御ができないため時には画質上不十分な補
正しかされていない場合があるという間頌を有していた
This proposal has the feature B that there is no need to incorporate a probe for measuring the surface potential of the photoreceptor into the device and control is performed using simple logic.However, on the other hand, the above proposal Since correction for the drop in charging potential due to the rise in the charge potential is performed using matrices and dust, fine control is not possible and the correction may sometimes be insufficient in terms of image quality.

〔発明が解決しようとする間順点〕[While the invention is trying to solve the problem]

本発明は、単純な制御によって、感光体及びその周囲の
温度環境下で、連続記録による疲労のために感光体の帯
電電位が低下してくる問題を解決するようにした静電記
録装置を提供することを目的とする。
The present invention provides an electrostatic recording device that solves the problem that the charged potential of a photoconductor decreases due to fatigue due to continuous recording under the temperature environment of the photoconductor and its surroundings through simple control. The purpose is to

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

本発明は、感光体を帯電手段で一様に帯電を行い、帯電
面を露光する工程を含む工程で静電潜像ご形成する静電
記録装置において、記録数あるいはそれに相当する時間
℃経過後、前記帯電を行う帯電電流又は帯電電圧を切替
え、かつ前記帯電電流又は帯電電圧の基準を前記感光体
又はその周囲温度に対して所定の連続関数に基づいて変
化させたことを特徴とする静電記録装置を提供するもの
である。
The present invention relates to an electrostatic recording device in which an electrostatic latent image is formed in a process including uniformly charging a photoreceptor with a charging means and exposing the charged surface to light after the number of recordings or a period of time equivalent thereto has elapsed. , wherein the charging current or charging voltage for performing the charging is switched, and the reference of the charging current or charging voltage is changed based on a predetermined continuous function with respect to the temperature of the photoreceptor or its surrounding temperature. The present invention provides a recording device.

即ち本発明は、コピー数或いはそれに相当する時間情報
に基づいて、そのベースとなる帯’TXb ’(Ii流
又は帯電電圧のレベルを感光体又はその周囲温度に対し
て所定の関数により変化させ、微妙な感光体の温度変化
に対応でさる°ようにしたものである。
That is, the present invention changes the level of the base band 'TXb' (Ii current or charging voltage) according to a predetermined function with respect to the photoreceptor or its surrounding temperature, based on the copy number or time information corresponding thereto. It is designed to respond to subtle changes in the temperature of the photoreceptor.

〔実施例〕〔Example〕

第2図は、連続コピーによる感光体の電位低下の状況を
示すグラフである。感光体の帯電電位の低下カーブの姿
は、感光体の秤類・感度等によって異なるが、所定の工
程曽理下にある同種の感光体であれば、初期の感光体温
度で決まるほぼ同一の傾向を示す。第2図でカーブC2
]は感光体温度が10℃の初期条件で連続コピーを行っ
たときの表面電位の変化を示したもので、カーブC22
は加℃、カーブC23は30’Cの初期条件で連続コピ
ーを行ったときの表面電位の変化を示す。
FIG. 2 is a graph showing how the potential of the photoreceptor decreases due to continuous copying. The appearance of the decreasing curve of the charged potential of the photoconductor varies depending on the scale, sensitivity, etc. of the photoconductor, but if the photoconductor is of the same type under the specified process conditions, it will be approximately the same as determined by the initial temperature of the photoconductor. Show trends. Curve C2 in Figure 2
] shows the change in surface potential when continuous copying is performed under the initial condition that the photoreceptor temperature is 10°C, and curve C22
C indicates the change in surface potential when continuous copying is performed under the initial conditions of 30'C and curve C23.

初期の感光体又はその周囲温度と感光体の表面電位との
関係を示したのが第3図で示したカーブC30である。
Curve C30 shown in FIG. 3 shows the relationship between the initial temperature of the photoreceptor or its surroundings and the surface potential of the photoreceptor.

感光体又はその周囲温度が変化しても、感光体の表面電
位が同一の状態に保持するためには、例えば帯電手段が
電流制御によるときは第4図のカーブC40に示すよう
な帯電トランスの出力電流とすることが必要である。実
験的に求められた第4図のカーブC40から判ることは
、感光体又はその周囲温度+1℃の温度変化に対して、
帯電トランスの出力電流は+3〜4pAの変化をさせる
ことにより、温度による影響を補正し、同一の表面電位
を保持することとなる。
In order to maintain the surface potential of the photoreceptor in the same state even if the temperature of the photoreceptor or its surroundings changes, for example, when the charging means is based on current control, a charging transformer as shown in curve C40 in FIG. It is necessary to make the output current. It can be seen from the experimentally determined curve C40 in FIG.
By varying the output current of the charging transformer by +3 to 4 pA, the influence of temperature is corrected and the same surface potential is maintained.

本発明はこのようにして、感光体又はその周囲温度に基
づいて例えば帯電トランスの出力電流を制御し、初期の
感光体表面電位を例えば1000 Vに設定する。
In this way, the present invention controls the output current of, for example, a charging transformer based on the temperature of the photoreceptor or its surroundings, and sets the initial surface potential of the photoreceptor to, for example, 1000 V.

第5図は、連続コピーによる感光体の電位低下の状況を
示すグラフである。感光体の帯電電位の低下カーブの姿
は、感光体の種類・感度等によって異なるが、所定の工
程管理下にある同種の感光体であれば、斜線で示すよう
なある幅をもつもので、はぼ同一の傾向を示す(C50
参照)。このような幅をもった電位低下は量産上のバラ
ツキによるものである。
FIG. 5 is a graph showing how the potential of the photoreceptor decreases due to continuous copying. The shape of the charging potential drop curve of a photoreceptor varies depending on the type of photoreceptor, sensitivity, etc., but if the photoreceptor is of the same type under specified process control, it will have a certain width as shown by the diagonal line. shows almost the same tendency (C50
reference). The potential drop having such a range is due to variations in mass production.

第5図に示した圓では約印コピーで100 Vの電位低
下という悪い例を示しであるが、この場合の制御方法と
して、本発明の特徴とするところは、初期の10001
に一定に保持しようとするものではなく、破線C’51
で図示しである”実用上問題とならない電位レベル”を
維持しようとするところにある。事前に実験的に得られ
た感光体の量産バラツキを考慮して電流値切替えを行い
、カーブC12で示すような表面電位とすれば、ドラム
によって電位を逆に高くしすぎることを防止できる。実
験によれば少なくとも2回のジャンプによって大さな改
善が得られた。第5図の実施例では、連続15枚と連続
印枚の2点で電流値切替えを行うようにしたものである
The circle shown in FIG. 5 shows a bad example in which the potential drops by 100 V when copying the circle mark, but as a control method in this case, the feature of the present invention is that the initial 10001
The dashed line C'51 is not intended to be held constant.
The aim is to maintain a "potential level that does not pose a practical problem" as shown in the figure. If the current value is changed in consideration of the mass production variation of photoreceptors obtained experimentally in advance, and the surface potential is set as shown by curve C12, it is possible to prevent the potential from becoming too high due to the drum. Experiments have shown that at least two jumps provide a significant improvement. In the embodiment shown in FIG. 5, the current value is switched at two points: 15 consecutive sheets and 15 consecutive sheets.

このように本発明は感光体の特性に基づいて予め電流値
切替えするコピー数(又はそれに相当する時間)を定め
ておき、所定の電流値に切替えることによって、連続コ
ピ一時の表面電位の電位低下するのを改善したものであ
る。
In this way, the present invention predetermines the number of copies (or the time equivalent to it) at which the current value is changed based on the characteristics of the photoreceptor, and by switching to a predetermined current value, the surface potential decreases temporarily during continuous copying. This is an improvement over the previous method.

第6図には感光体が疲労した時の回復の過程状況を示し
たもので、点線で示したC 61は実用上問題とならな
い感光体の電位レベルを示し、、C62Aは100v電
位低下後の時間経過に伴う回復過程を示したもので、C
62Bは150 V電位低下後の回復過程を示している
。回復の仕方は疲労の度合によって異なるが、実用上は
2つのケースを考えることで充分対応がとれる。例えば
第5図の例についてみると15フビー〜(イ)コピーの
場合は約100 Vの低下、印コピー以上は150Vの
電位低下をしているものと判断すればよい。
Figure 6 shows the recovery process when the photoreceptor becomes fatigued. C61, shown by a dotted line, indicates the potential level of the photoreceptor that does not pose a practical problem, and C62A shows the potential level after a 100V potential drop. This shows the recovery process over time, and C
62B shows the recovery process after a 150 V potential drop. The method of recovery differs depending on the degree of fatigue, but in practice it is sufficient to consider two cases. For example, in the example shown in FIG. 5, it can be determined that the potential is reduced by about 100 V in the case of copies of 15 mm to (a), and 150 V in the case of copies marked with marks or above.

このデータをもとにして次コピーのスタート時の電流値
を選択すればよい。
Based on this data, the current value at the start of the next copy can be selected.

第1表はコピー数に基づく電流条件のプログラムのI 
fllJを示したもので、ここで標準電流は、例えば感
光体温度10℃で240μA、20°Cで270μA(
第4図参照)であって、表は之に対する2回の切替えを
行うジャンプ時の係数で示している。(即ち帯電電流=
標準電流×係数) 次に連続コピー後、休止して再スタートした時の電流条
件のプログラムの1例を下表(第2表)に示す。
Table 1 shows the current condition program I based on copy number.
fllJ, where the standard current is, for example, 240 μA at a photoreceptor temperature of 10°C and 270 μA at 20°C (
(see FIG. 4), and the table shows the coefficients at the time of jump, which performs two switchings. (i.e. charging current =
Standard current x coefficient) Next, the table below (Table 2) shows an example of a program with current conditions when stopping and restarting after continuous copying.

(第 2 表) ここで、第2表における便準電流は、第1表でセットし
た標準電流値をそのまま踏襲しても差し4支えないが、
再スタート時点での感光体又はその周囲温度によって新
たにセットした標準電流とすることにより、更に好まし
い帯電制御がなされる。
(Table 2) Here, the standard current in Table 2 may be the same as the standard current value set in Table 1, but
More preferable charging control can be achieved by setting a new standard current based on the temperature of the photoreceptor or its surroundings at the time of restart.

第1表は2回の切替えを行うジャンプ時の係数を示した
ものであるが、第3表は第1表の場合より更に細かく帯
電電流3切替える場合のコピー数と電流係数とを示す。
Table 1 shows the coefficients at the time of jumping when switching is performed twice, but Table 3 shows the copy number and current coefficient when switching the charging current three times in more detail than in Table 1.

第1図は上記のプログラムを適用する静電記録装置の概
略構成図を示す。工は感光体ドラムで、その周面上には
例えば第5図及び第6図に示すような疲労特性と、第3
図に示すような温度特性をもった感光体1aが張設して
あり、時計方向に回転する。2は感光体1aを一様にコ
ロナ放電する電流制御方式の帯電器で、本発明による電
流切替えがなされる。
FIG. 1 shows a schematic configuration diagram of an electrostatic recording apparatus to which the above program is applied. The structure is a photoreceptor drum, and on its circumferential surface there is a fatigue characteristic as shown in FIGS. 5 and 6, and a third
A photoreceptor 1a having temperature characteristics as shown in the figure is stretched and rotates clockwise. Reference numeral 2 denotes a current control type charger that uniformly corona discharges the photoreceptor 1a, and the current is switched according to the present invention.

3は画像露光部で複写すべき原稿の像を感光体Ia上に
投影し潜像を形成する。4は現像部で現像を行い、感光
体1a上の潜像をトナー像とする。
3 projects an image of the original to be copied onto the photoreceptor Ia in an image exposure section to form a latent image. 4 performs development in a developing section, and converts the latent image on the photoreceptor 1a into a toner image.

また温度センサ5分感光体1aに近接して設は感光体1
aの温度ご検知する。
In addition, the temperature sensor 5 minutes is installed close to the photoconductor 1a.
Detects the temperature of a.

温度検知回路によって検知された温度は制御部Aによっ
て第4図カーブC40に示した変換がなされ、帯電器2
への標準電流がセットされる。
The temperature detected by the temperature detection circuit is converted by the control unit A as shown in curve C40 in FIG.
The standard current to is set.

一方制御部Bは、例えば第1表に示した電流係数ニよっ
て制御し、コピーカウンタからの連続コピーのコピー数
によって、例えば上記の実施例でハ20コピーと70コ
ピーを終えたところで電流係数をそれぞれ1.04.1
.08に切替える。
On the other hand, the control unit B controls the current coefficient according to, for example, the current coefficient d shown in Table 1, and calculates the current coefficient according to the number of copies of continuous copying from the copy counter, for example, when the 20th copy and the 70th copy are completed in the above embodiment. 1.04.1 respectively
.. Switch to 08.

上記の制御部Bはタイマを有しているので、連続コピー
が終了したときは終了時点からの時間を計測し、第2表
に示したように3分、加分を境として次のコピー開始時
の電流値決定のファクターとする。このように組み合わ
された制御は、メインスイッチE OFFとする時は又
第1表に戻ってスター・トする。あるいはメインスイッ
チをOFF した後もタイマーを作動させてそのカウン
ト値に従って次のコピー開始時の電流値のファクターと
してもよいことは勿論である。あるいはメインスイ。
Since the above control unit B has a timer, when the continuous copy ends, it measures the time from the end point and starts the next copy after 3 minutes as shown in Table 2. This is the factor for determining the current value at the time. The control combined in this way returns to Table 1 and starts again when the main switch E is turned off. Alternatively, the timer may be operated even after the main switch is turned off, and the counted value may be used as a factor for the current value at the start of the next copy. Or the main sui.

チをOFF した後、定着器等のいわゆるウオーミング
・アップタイムを利用して休止時間を求め、この時間に
基づいて電流値を決定してもよい。
After the switch is turned off, the rest time may be determined using the so-called warming up time of the fixing device, etc., and the current value may be determined based on this time.

更に第1表、第2表の実施例を詳述する。例えば周囲温
度20℃で5コピーを行うと制御部Aによって帯電器2
への標準電流は270μAにセットされる。加コピーが
過ぎたところで、第1表に示したように係数は1.04
が選択され3分以内でコピーを再開すると係数は1.0
4のまま再開されるがここでCPUはジャンプする21
コピーからコピー分開始したものとみなす。従って更に
49コピーを行うまで係数は1,04に設定されており
関コピー目で係数は1.08となる。(21+関=71
)上述したプログラムの他にも下の2とおりのプログラ
ムがある。
Furthermore, the examples shown in Tables 1 and 2 will be explained in detail. For example, when 5 copies are made at an ambient temperature of 20°C, the charger 2
The standard current to is set to 270μA. After the additional copy, the coefficient is 1.04 as shown in Table 1.
is selected and copying resumes within 3 minutes, the coefficient is 1.0
It restarts at 4, but the CPU jumps at this point 21
It is assumed that the copy portion starts from the copy. Therefore, the coefficient is set to 1.04 until 49 more copies are made, and the coefficient becomes 1.08 at the second copy. (21 + Seki = 71
) In addition to the programs mentioned above, there are the following two programs.

(i)新たに70コピーされるまで係数は1.04P保
持しておく。
(i) The coefficient is held at 1.04P until 70 new copies are made.

(11)  更に45コピー(25コピー(最初の)+
45コピー=70フビー)されるまでは係数1.04と
しそれ以降1.08とする。
(11) 45 more copies (25 copies (first) +
The coefficient is set to 1.04 until 45 copies = 70 copies, and 1.08 thereafter.

上記3つのプログラムのうち、最初に述べたものが最も
好ましい。
Of the three programs mentioned above, the first mentioned is the most preferred.

なおこの実施例では帯電電流を切替える電流制御方式に
ついて説明したが、帯電電圧を切替える電圧制御方式の
コロナ帯電も本発明に含まれる。
In this embodiment, a current control method for switching the charging current has been described, but the present invention also includes corona charging using a voltage control method for switching the charging voltage.

また本実施例では所定のコピ一枚数に達したところをも
って帯電電流値の切替えを行ったが、連続コピーがなさ
れる所定時間の経過をもって帯電電流(雷庄)の切替え
を行うことも可能であって本発明に含まれる。また、複
写機について述べたがこれに限ることなく例えばレーザ
プリンタ等の記録装置も本発明に含まれる。
Furthermore, in this embodiment, the charging current value was switched when a predetermined number of copies was reached, but it is also possible to switch the charging current (Raisho) after a predetermined time elapses during continuous copying. are included in the present invention. Further, although the copying machine has been described, the present invention is not limited to this, and also includes a recording apparatus such as a laser printer.

第7図は本発明により、第3表による補正を行ったとき
の感光体の表面電位を示すもので、何等の対策がなされ
ないとき第2図に示すような電位変化を示したものが、
第7図のように制御される。
FIG. 7 shows the surface potential of the photoreceptor when the correction according to Table 3 is carried out according to the present invention, and if no countermeasures are taken, the potential change shown in FIG. 2 will be as follows.
It is controlled as shown in FIG.

図において、カーブC71、C72、C73はそれぞれ
感光体又はその周囲温度が10℃、20’C135’C
での。
In the figure, curves C71, C72, and C73 indicate that the photoreceptor or its surrounding temperature is 10°C and 20'C135'C, respectively.
At.

補正状況を示したものである。This shows the correction status.

最後に第8図は、本発明による1実施例の回路図2示し
たもので、第1図に示した制御部A1制御部B、高圧電
源部の回路例を示したものである。
Finally, FIG. 8 shows a circuit diagram 2 of one embodiment of the present invention, which shows an example of the circuit of the control section A1, the control section B, and the high-voltage power supply section shown in FIG.

温度検知回路によって検知された感光体又はその周囲温
度は電圧として制御部Aに出力するが、制御部Aにおい
ては、基準となる電池電圧Vl。
The temperature of the photoconductor or its surroundings detected by the temperature detection circuit is output as a voltage to the control unit A, and in the control unit A, the battery voltage Vl is used as a reference.

V2.V3とアンプAI、A2、A3によりそれぞれ電
圧V1、v2、■3よりの偏差が得られることとなる。
V2. Deviations from voltages V1, v2, and 3 are obtained by V3 and amplifiers AI, A2, and A3, respectively.

制御部BにおけるREM  1.2.3は前記の切替え
コピー数(例えば21.71)による切替えによって、
前記の制御部Aにおいて得られた偏差を適宜選択する。
REM 1.2.3 in the control unit B performs switching according to the switching copy number (for example, 21.71) as described above.
The deviation obtained in the control section A is selected as appropriate.

このようにして選択された偏差は高圧電源部でADコン
バータ、発振回路2経てトランスにより昇圧されて帯電
器2に高圧電圧が印加される。帰還回路は、定電流(定
電圧)のための回路で、帰還回路によって負荷変動にか
かわらず、帯電器2への帯電電流(帯電電圧)が安定的
に制御される。
The deviation selected in this way is boosted by a transformer through an AD converter and an oscillation circuit 2 in a high voltage power supply section, and a high voltage is applied to a charger 2. The feedback circuit is a constant current (constant voltage) circuit, and the feedback circuit stably controls the charging current (charging voltage) to the charger 2 regardless of load fluctuations.

〔発明の効果〕〔Effect of the invention〕

本発明によるときは、感光体の表面電位?訓定するプロ
ーブを装置内に組み込む必要がなく、簡単なロジックで
信頼性の高い制御を可能とし、微妙な感光体又は之を取
り巻く機内温度変化にもマトリックス等に頼ることなく
対応ができ、連続記録コピーを行っても均一な濃度が得
られる静電記録装置を得ることができた。
According to the present invention, what is the surface potential of the photoreceptor? There is no need to incorporate a training probe into the device, it enables highly reliable control with simple logic, it can respond to subtle temperature changes in or around the photoreceptor without relying on a matrix, etc., and it can be used continuously. It was possible to obtain an electrostatic recording device that can provide uniform density even when performing recording copying.

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

第1図は本発明の実施例で概略構成図2示す。 第2図は未対策時の感光体の電位変化を示す。 第3図は感光体(周囲)温度と感光体の表面電位の関係
を示す。 第4図は感光体(周囲)温度と帯電電流補正の関係を示
す。 第5図はコピー数と感光体の表面電位の関係を示すグラ
フを示す。 第6図は休止時間後の感光体の表面電位の回復を示すグ
ラフを示す。 第7図は本発明による帯電電位の補正の状況P示す。 第8図は本発明による工実施例の回路図を示す。 1・・・感光体ドラム  1a・・・感光体2・・・帯
電器     3・・・画像露光部4・・・現像部  
   5・・・温度センサ代理人  弁理士 野 1)
着 親 第1図 第2図 第3図 島謄(Ml!1)IfL度 、♂刷≦、LノK、く周回ン V雫[2第5図 第6図
FIG. 1 shows a schematic configuration diagram 2 of an embodiment of the present invention. FIG. 2 shows the potential change of the photoreceptor when no countermeasures are taken. FIG. 3 shows the relationship between the photoreceptor (ambient) temperature and the surface potential of the photoreceptor. FIG. 4 shows the relationship between photoreceptor (ambient) temperature and charging current correction. FIG. 5 shows a graph showing the relationship between the copy number and the surface potential of the photoreceptor. FIG. 6 shows a graph showing the recovery of the surface potential of the photoreceptor after the rest period. FIG. 7 shows a situation P of correction of the charging potential according to the present invention. FIG. 8 shows a circuit diagram of an embodiment of the invention. 1... Photoreceptor drum 1a... Photoreceptor 2... Charger 3... Image exposure section 4... Developing section
5...Temperature sensor agent Patent attorney No 1)
Arrival parent Figure 1 Figure 2 Figure 3 Island translation (Ml! 1) If L degree, ♂ printing ≦, L no K, circle turn V drop [2 Figure 5 Figure 6

Claims (1)

【特許請求の範囲】[Claims] 感光体を帯電手段で一様に帯電を行い、帯電面を露光す
る工程を含む工程で静電潜像を形成する静電記録装置に
おいて、記録数あるいはそれに相当する時間の経過後、
前記帯電を行う帯電電流又は帯電電圧を切替え、かつ前
記帯電電流又は帯電電圧の基準を前記感光体又はその周
囲温度に対して所定の連続関数に基づいて変化させたこ
とを特徴とする静電記録装置。
In an electrostatic recording device that forms an electrostatic latent image in a process that includes a step of uniformly charging a photoreceptor with a charging means and exposing the charged surface to light, after the number of recordings or a period of time equivalent to the number of recordings has elapsed,
Electrostatic recording characterized in that the charging current or charging voltage for performing the charging is switched, and the reference of the charging current or charging voltage is changed based on a predetermined continuous function with respect to the temperature of the photoreceptor or its surrounding temperature. Device.
JP19550684A 1984-09-17 1984-09-17 Electrostatic recording device Pending JPS6172268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19550684A JPS6172268A (en) 1984-09-17 1984-09-17 Electrostatic recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19550684A JPS6172268A (en) 1984-09-17 1984-09-17 Electrostatic recording device

Publications (1)

Publication Number Publication Date
JPS6172268A true JPS6172268A (en) 1986-04-14

Family

ID=16342214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19550684A Pending JPS6172268A (en) 1984-09-17 1984-09-17 Electrostatic recording device

Country Status (1)

Country Link
JP (1) JPS6172268A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5966558A (en) * 1994-09-28 1999-10-12 Ricoh Company, Ltd. Image forming apparatus having control of exposure and charging depending on detected temperature

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS557786A (en) * 1978-07-03 1980-01-19 Minolta Camera Co Ltd Surface potential stabilizing method of photoreceptor
JPS56143453A (en) * 1980-04-09 1981-11-09 Ricoh Co Ltd Image density correction method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS557786A (en) * 1978-07-03 1980-01-19 Minolta Camera Co Ltd Surface potential stabilizing method of photoreceptor
JPS56143453A (en) * 1980-04-09 1981-11-09 Ricoh Co Ltd Image density correction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5966558A (en) * 1994-09-28 1999-10-12 Ricoh Company, Ltd. Image forming apparatus having control of exposure and charging depending on detected temperature

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