JPH03192373A - Image recording method - Google Patents
Image recording methodInfo
- Publication number
- JPH03192373A JPH03192373A JP33307889A JP33307889A JPH03192373A JP H03192373 A JPH03192373 A JP H03192373A JP 33307889 A JP33307889 A JP 33307889A JP 33307889 A JP33307889 A JP 33307889A JP H03192373 A JPH03192373 A JP H03192373A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- charge holding
- holding medium
- photoreceptor
- charge
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 13
- 108091008695 photoreceptors Proteins 0.000 claims description 35
- 230000014759 maintenance of location Effects 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は放電を利用して絶縁層上に電荷パターンを形成
するようにした画像記録方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording method in which a charge pattern is formed on an insulating layer using discharge.
〔従来の技術］
支持体上に導電性層、さらに光導電性層を形成した感光
体と、支持体上に導電性層、さらに絶縁層を形成した電
荷保持媒体とを近接対向配置し、両溝電性層間に電圧を
印加しながら露光し、感光体と電荷保持媒体間にコロナ
放電を生じさせて電荷保持媒体上に画像を記録し、再生
する方法について我々は既に特願昭６３−１２１５９２
として出願している。この方法によれば極めて高解像度
のアナログ記録が可能であり、かつ電荷保持媒体上の静
電潜像を半永久的に保持することが可能である。[Prior Art] A photoreceptor having a conductive layer and a photoconductive layer formed on a support and a charge retention medium having a conductive layer and an insulating layer formed on the support are placed close to each other, and both We have already published Japanese Patent Application No. 121592/1983 regarding a method for recording and reproducing images on a charge holding medium by exposing the photoreceptor to light while applying a voltage between the conductive layers and causing corona discharge between the photoreceptor and the charge holding medium.
The application has been filed as According to this method, extremely high-resolution analog recording is possible, and it is possible to semi-permanently retain an electrostatic latent image on a charge-retaining medium.
この画像記録方法について説明すると、第３図（ａ）に
示すように１ ｍ厚のガラスからなる光導電層支持体２
ａ上に１００ＯＡ厚のＩＴＯからなる透明な感光体電極
２ｂを形成し、この上に１０μｍ程度の光導電層２Ｃを
形成して感光体２を構成する。この感光体２に対して、
１０μｍ程度の空隙を介して電荷保持媒体１を配置する
。電荷保持媒体１は１１ｍ厚のガラスからなる絶縁層支
持体ｌｃ上に１０００人厚のＡ１電極１ｂを蒸着により
形成し、この電極ｌｂ上に１０μｍ厚の絶縁層１ａを形
成したものである。To explain this image recording method, as shown in FIG. 3(a), a photoconductive layer support 2 made of glass with a thickness of 1 m
A transparent photoreceptor electrode 2b made of ITO with a thickness of 100 OA is formed on the photoreceptor 2a, and a photoconductive layer 2C of about 10 μm is formed on this to constitute the photoreceptor 2. For this photoreceptor 2,
The charge retention medium 1 is placed with a gap of about 10 μm in between. The charge retention medium 1 was prepared by forming an A1 electrode 1b with a thickness of 1000 layers by vapor deposition on an insulating layer support lc made of glass with a thickness of 11 m, and an insulating layer 1a with a thickness of 10 μm on this electrode lb.
そして、電源Ｅにより電極２ｂ、ｌｂ間に電圧を印加す
ると、暗所であれば光導電層２ｃは高抵抗体であるため
、電極間には何の変化も生じないが、感光体２側より光
が入射すると、光が入射した部分の光導電層２ｃは導電
性を示し、絶縁層１ａとの間にコロナ放電が生じ、ある
いは電界放出により光導電層２ｃから電荷が引き出され
、電界により加速されて絶縁層１ａに電荷が蓄積される
。Then, when a voltage is applied between the electrodes 2b and lb by the power source E, no change occurs between the electrodes in a dark place because the photoconductive layer 2c is a high-resistance material. When light is incident, the photoconductive layer 2c in the area where the light is incident exhibits conductivity, and corona discharge occurs between the photoconductive layer 2c and the insulating layer 1a, or charges are extracted from the photoconductive layer 2c by field emission, and are accelerated by the electric field. As a result, charges are accumulated in the insulating layer 1a.
画像記録が終了すると、第３図（６）に示すように、感
光体と電荷保持媒体間を電気的に短絡して供給電圧を０
ＦＦＬ、、その後電荷保持媒体を取り出して使用に供す
るようにしている。When the image recording is completed, as shown in FIG. 3 (6), the photoreceptor and the charge holding medium are electrically shorted to reduce the supply voltage to zero.
FFL, and then the charge retention medium is taken out and ready for use.
〔発明が解決すべき課題〕
ところで感光体と電荷保持媒体間を電気的に短絡した場
合、感光体と電荷保持媒体間には大きな逆電圧が生じて
逆方向に再放電が生じてしまう。[Problems to be Solved by the Invention] By the way, if there is an electrical short circuit between the photoconductor and the charge retention medium, a large reverse voltage will be generated between the photoconductor and the charge retention medium, causing re-discharge in the opposite direction.
この点について、第４図、第５図により説明する。This point will be explained with reference to FIGS. 4 and 5.
感光体、空隙、電荷保持媒体はそれぞれ所定の容量を持
ったキャパシタと考えられ、感光体と電荷保持媒体の膜
厚、誘電率、面積を同じとすれば両者は等しい静電容量
を有している。また、感光体と電荷保持媒体との間隙を
１２〜１３μｍ程度とすると、空隙における放電破壊電
圧は４００Ｖ程度である。したがって、例えば印加電圧
を２０００ｖとして電圧印加露光を行うと、露光部にお
ける感光体は導電体となるので、画像露光系全体は、第
４図（ａ）に示すように空隙の容量Ｃ２に４００Ｖ１電
荷保持媒体の容量Ｃ３に１６００Ｖかかった等価回路と
考えることができ、同様に未露光部では第４図υに示す
ように感光体の容量Ｃ１にａｏｏｖ、空隙の容量Ｃ２１
，：４００Ｖ、電荷保持媒体の容量Ｃ３に８００ｖかか
った等価回路と考えることができる。The photoreceptor, the air gap, and the charge holding medium are each considered to be capacitors with a predetermined capacitance, and if the film thickness, dielectric constant, and area of the photoreceptor and the charge holding medium are the same, they have the same capacitance. There is. Further, when the gap between the photoreceptor and the charge holding medium is about 12 to 13 μm, the discharge breakdown voltage in the gap is about 400V. Therefore, for example, when voltage exposure is performed with an applied voltage of 2000V, the photoreceptor in the exposure section becomes a conductor, and the entire image exposure system has a charge of 400V1 on the capacitance C2 of the gap, as shown in FIG. 4(a). It can be considered as an equivalent circuit in which 1600V is applied to the capacitance C3 of the holding medium. Similarly, in the unexposed area, as shown in FIG.
, :400V, and can be considered as an equivalent circuit in which 800V is applied to the capacitance C3 of the charge holding medium.
そこで感光体、空隙、電荷保持媒体における電位分布に
ついて考えてみると、例えば感光体の電極を基準位置と
し、Ｐ点を感光体の端部位置、Ｑ点を空隙の端部位置、
Ｒ点を電荷保持媒体の端部位置としたとき、露光部にお
ける電位分布は感光体が導電体であるので第５図（ａ）
におけるＰ−Ｑ−Ｒ１未露光部における電位分布は第５
図（ｂ）におけるＰ−Ｑ−Ｈのようになる。Therefore, when considering the potential distribution in the photoreceptor, the gap, and the charge holding medium, for example, with the electrode of the photoreceptor as the reference position, point P is the edge position of the photoreceptor, point Q is the edge position of the gap,
When point R is taken as the end position of the charge holding medium, the potential distribution in the exposed area is as shown in Figure 5(a) since the photoreceptor is a conductor.
The potential distribution in the unexposed part of P-Q-R1 in
It becomes like P-Q-H in figure (b).
第５図（ａ）に示す状態で、感光体と電荷保持媒体間を
短絡すると、Ｒ点はＯ電位となってＲ′点に、またＱ点
も同じ電位差だけ下がってＱ′点になり、電位分布はＰ
−Ｑ’−Ｒ’となってＰＱ’間の電位差、すなわち空隙
にかかる電圧は１６００Ｖとなる。When the photoreceptor and the charge holding medium are short-circuited in the state shown in FIG. 5(a), point R becomes O potential and becomes point R', and point Q also drops by the same potential difference to become point Q'. The potential distribution is P
-Q'-R', and the potential difference between PQ', that is, the voltage applied to the air gap, becomes 1600V.
第５図（ｂ）の場合もまったく同様にＰＱ’間の電位差
、すなわち空隙にかかる電圧は１６００Ｖとなる。In the case of FIG. 5(b), the potential difference between PQ', that is, the voltage applied to the gap, is 1600V in exactly the same way.
その結果、第４図の等価回路において、各キャパシタに
かかる電圧は第４図（ａ）、（社）の状態からそれぞれ
第４図（Ｃ）、（イ）の状態になり、それぞれ空隙には
１６００Ｖの逆電圧が印加され、放電破壊電圧４００ｖ
を越えるこめ、瞬間的に逆方向に再放電が生じ、記録さ
れている倍号が乱されて像ボケが生じてしまうという問
題があった。As a result, in the equivalent circuit of Fig. 4, the voltage applied to each capacitor changes from the states of Fig. 4(a) and (A) to the states of Fig. 4(C) and (A), respectively, and A reverse voltage of 1600V is applied, and the discharge breakdown voltage is 400V.
There is a problem in that when the value exceeds 1, a re-discharge occurs instantaneously in the opposite direction, which disturbs the recorded multiplier and causes image blurring.
本発明は上記課題を解決するためのもので、画像形成後
、印加電圧をＯＦＦ ＜電圧０）にしても逆放電が生ず
るのを防止し、像乱れが生じないようとすることができ
る画像記録方法を提供することを目的とする。The present invention is intended to solve the above problems, and is capable of recording an image that can prevent reverse discharge from occurring even if the applied voltage is turned off (<voltage 0) after image formation, and prevent image disturbance from occurring. The purpose is to provide a method.
そのために本発明は、支持体表面上に導電性層、光導電
性層を形成した感光体と、支持体上に導電性層、絶縁性
層を形成した電荷保持媒体とを対向配置し、導電性層間
に電圧を印加しながら画像露光することにより静電荷像
を電荷保持媒体上に君己録する画像記録方法において、
電荷保持媒体上に静電荷像を形成した後、電圧印加状態
で感光体、電荷保持媒体を分離することにより、空隙中
に逆放電が生ずるのを防止するようにしたことを特徴と
する。To this end, the present invention provides a photoreceptor in which a conductive layer and a photoconductive layer are formed on the surface of a support, and a charge retention medium in which a conductive layer and an insulating layer are formed on the support. In an image recording method in which an electrostatic charge image is recorded on a charge retention medium by imagewise exposure while applying a voltage between the electrostatic layers,
A feature of the present invention is that after an electrostatic charge image is formed on a charge holding medium, the photoreceptor and the charge holding medium are separated while a voltage is applied to prevent reverse discharge from occurring in the gap.
本発明は電圧印加露光により電荷保持媒体上に静電荷像
を形成した後、感光体と電荷保持媒体とに電圧を印加し
た状態のまま、放電破壊電圧が空隙にかかっている電圧
を越えて逆放電が起こらない距離まで感光体、電荷保持
媒体を分離した後、印加電圧をＯとすることにより、感
光体と電荷保持媒体間に逆放電が起こるの防止し、像乱
れが生ずるのを防止することができる。In the present invention, after an electrostatic charge image is formed on a charge holding medium by voltage application exposure, the discharge breakdown voltage exceeds the voltage applied to the gap and is reversed while the voltage is applied to the photoreceptor and the charge holding medium. After separating the photoreceptor and the charge holding medium to a distance where no discharge occurs, the applied voltage is set to O to prevent reverse discharge from occurring between the photoreceptor and the charge holding medium and to prevent image disturbance from occurring. be able to.
以下、実施例を図面を参照して説明する。 Examples will be described below with reference to the drawings.
第１図は本発明の画像記録方法を説明するための図、第
２図は放電破壊電圧と空隙にかかる電圧との関係を示す
図である。なお、第３図と同一番号は同一内容を示して
いる。FIG. 1 is a diagram for explaining the image recording method of the present invention, and FIG. 2 is a diagram showing the relationship between the discharge breakdown voltage and the voltage applied to the gap. Note that the same numbers as in FIG. 3 indicate the same contents.
先ず、第１図（ａ）に示すように感光体と電荷保持媒体
間に電圧を印加した状態で露光することにより、電荷保
持媒体１上に静電荷像を形成する。次に、第１図（ｂ）
に示すように電荷保持媒体または感光体を移動させて両
者間の間隔を所定以上に拡大させる。First, as shown in FIG. 1(a), an electrostatic charge image is formed on the charge holding medium 1 by exposing it to light while applying a voltage between the photoreceptor and the charge holding medium. Next, Figure 1(b)
As shown in , the charge holding medium or the photoreceptor is moved to increase the distance between them to a predetermined value or more.
飼犬ば、ポリビニルカルバゾール等からなる有機感光体
（比誘電率が３、膜厚１０μｍ）、シリコン樹脂、フッ
素樹脂等からなる電荷保持媒体（比誘電率が３、膜厚１
０μｍ）、空隙を２０μｍ１印加電圧を１５００Ｖとし
、横軸を感光体の電極からの距離、縦軸を各位置におけ
る電位としたとき、パッシェンの法則から求められる空
隙の放電破壊電圧は直線Ａに示すようになり、また電圧
印加状態において空隙にかかる電圧は曲線Ｂ１印加電圧
を０にしたとき空隙にかかる電圧は曲線Ｃのようになる
。For pets, organic photoreceptors made of polyvinyl carbazole (relative permittivity: 3, film thickness: 10 μm), charge retention media (relative permittivity: 3, film thickness: 1) made of silicone resin, fluororesin, etc.
0 μm), the gap is 20 μm, the applied voltage is 1500 V, the horizontal axis is the distance from the photoreceptor electrode, and the vertical axis is the potential at each position, then the discharge breakdown voltage of the gap determined from Paschen's law is shown by straight line A. The voltage applied to the gap in the voltage applied state is curve B1, and the voltage applied to the gap is curve C when the applied voltage is set to 0.
そこで、直線Ａと曲線Ｃが等しくなる点りよりも感光体
と電荷保持媒体との距離を離してから電圧をＯとすると
、放電破壊電圧が空隙にかかる電圧よりも大きくなるの
で放電が生じることはない。Therefore, if the distance between the photoreceptor and the charge holding medium is increased from the point where straight line A and curve C become equal, and then the voltage is set to O, discharge will occur because the discharge breakdown voltage will be greater than the voltage applied to the gap. There isn't.
そこでこのような状態になるまで感光体と電荷保持媒体
を離した後、第１図（Ｃ）に示すように感光体と電荷保
持媒体間を短絡すれば逆放電が生じないようにして電荷
保持媒体を取りだすことができる。Therefore, after separating the photoreceptor and the charge holding medium until such a state is reached, a short circuit is made between the photoreceptor and the charge holding medium as shown in Figure 1 (C) to prevent reverse discharge and hold the charge. The medium can be taken out.
印加電圧、膜厚等を第２図で説明した場合と同じ条件と
して、感光体と電荷保持媒体との距離を離さずに印加電
圧をＯにしたとき、露光部分の電位は８２２Ｖ、未露光
部分の電位は２９０Ｖであったが、電圧を印加したまま
空隙を広げて逆放電が生じないようにし、その後に印加
電圧を０にしたところ、露光部の電位は９９１ｖ、未露
光部の電位は４５９Ｖとなり、高い信号電圧を得ること
ができた。When the applied voltage, film thickness, etc. are the same as those explained in Fig. 2, and the applied voltage is set to O without increasing the distance between the photoreceptor and the charge holding medium, the potential of the exposed part is 822V, and the potential of the unexposed part is 822V. The potential of the exposed area was 290V, but when we widened the gap while applying the voltage to prevent reverse discharge and then reduced the applied voltage to 0, the potential of the exposed area was 991V and the potential of the unexposed area was 459V. As a result, a high signal voltage could be obtained.
なお、上記説明では空気中における場合について説明し
たが、誘電率の大きな透明なガス等を満たすことにより
放電破壊電圧を大きくして逆放電が起きにくくするよう
にしてもよい。Although the above explanation deals with the case in air, the discharge breakdown voltage may be increased by filling with a transparent gas or the like having a high dielectric constant, thereby making it difficult for reverse discharge to occur.
また、感光体と電荷保持媒体との分離は、両者を平行に
対向させたまま間隔を広げるようとすることが望ましい
が、必ずしもこれに限らず、横方向にずらしたり、斜め
方向に間隔を広げたり、あるいは一端を固定して他端の
間隔を広げて恰も剥がすように行ってもよい。Furthermore, it is preferable to separate the photoreceptor and the charge holding medium by widening the gap while leaving them facing each other in parallel, but this is not necessarily the case. Alternatively, one end may be fixed, the distance between the other ends may be widened, and then the tape may be peeled off.
以上のように本発明によれば、電圧印加露光により静電
荷像を形成した後、電圧印加状態のままで感光体と電荷
保持媒体との距離を広げ、放電破壊電圧が空隙にかかる
電圧を越えた状態で印加電圧をＯＦＦすることにより、
逆放電が生ずるのを防止し、像ボケが生ぜず、かつ高い
信号電圧を得ることが可能となる。As described above, according to the present invention, after an electrostatic charge image is formed by voltage application exposure, the distance between the photoreceptor and the charge retention medium is increased while the voltage is applied, and the discharge breakdown voltage exceeds the voltage applied to the gap. By turning off the applied voltage while
It is possible to prevent reverse discharge from occurring, prevent image blurring, and obtain a high signal voltage.
第１図は本発明の画像記録方法を説明するための図、第
２図は放電破壊電圧と空隙にかかる電圧との関係を示す
図、第３図は画像露光方法を説明するための図、第４図
は等価回路を示す図、第５図は逆放電の発生メカニズム
を説明するための図である。
１・・・電荷保持媒体、１ａ・・・絶縁層、１ｂ・・・
電荷保持媒体電極、ＩＣ・・・絶縁層支持体、２・・・
感光体、２ａ・・・光導電層支持体、２ｂ・・・感光体
電極、２Ｃ・・・光導電層、Ｅ・・・電源。FIG. 1 is a diagram for explaining the image recording method of the present invention, FIG. 2 is a diagram showing the relationship between the discharge breakdown voltage and the voltage applied to the gap, and FIG. 3 is a diagram for explaining the image exposure method. FIG. 4 is a diagram showing an equivalent circuit, and FIG. 5 is a diagram for explaining the mechanism of occurrence of reverse discharge. 1... Charge retention medium, 1a... Insulating layer, 1b...
Charge retention medium electrode, IC...insulating layer support, 2...
Photoreceptor, 2a... Photoconductive layer support, 2b... Photoconductor electrode, 2C... Photoconductive layer, E... Power source.
Claims (2)
感光体と、支持体上に導電性層、絶縁性層を形成した電
荷保持媒体とを対向配置し、導電性層間に電圧を印加し
ながら画像露光することにより静電荷像を電荷保持媒体
上に記録する画像記録方法において、電荷保持媒体上に
静電荷像を形成した後、電圧印加状態で感光体、電荷保
持媒体を分離することにより、空隙中に逆放電が生ずる
のを防止するようにしたことを特徴とする画像記録方法
。(1) A photoconductor with a conductive layer and a photoconductive layer formed on the surface of the support and a charge retention medium with a conductive layer and an insulating layer formed on the support are placed facing each other, and between the conductive layers In an image recording method in which an electrostatic charge image is recorded on a charge holding medium by image exposure while applying a voltage, after forming an electrostatic charge image on the charge holding medium, the photoreceptor and the charge holding medium are An image recording method characterized in that the separation prevents reverse discharge from occurring in the gap.
起こらない距離まで感光体と電荷保持媒体とを分離した
後、電圧をＯＦＦすることを特徴とする画像記録方法。(2) The image recording method according to claim 1, wherein the voltage is turned off after the photoreceptor and the charge holding medium are separated to a distance that does not cause reverse discharge.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33307889A JP2862299B2 (en) | 1989-12-22 | 1989-12-22 | Image recording method |
| PCT/JP1990/001497 WO1991007702A1 (en) | 1989-11-16 | 1990-11-16 | Image recording method, apparatus for said method and method of producing said apparatus |
| EP95202867A EP0697635B1 (en) | 1989-11-16 | 1990-11-16 | Process for recording images |
| DE69033918T DE69033918T2 (en) | 1989-11-16 | 1990-11-16 | Image recording process |
| DE69027427T DE69027427T2 (en) | 1989-11-16 | 1990-11-16 | METHOD AND DEVICE FOR RECORDING IMAGES |
| US07/720,858 US5298947A (en) | 1989-11-16 | 1990-11-16 | Process for recording images on an electrostatic information recording medium with delayed disconnection of charge accumulation voltage |
| EP90916801A EP0456827B1 (en) | 1989-11-16 | 1990-11-16 | Image recording process and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33307889A JP2862299B2 (en) | 1989-12-22 | 1989-12-22 | Image recording method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03192373A true JPH03192373A (en) | 1991-08-22 |
| JP2862299B2 JP2862299B2 (en) | 1999-03-03 |
Family
ID=18262021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33307889A Expired - Lifetime JP2862299B2 (en) | 1989-11-16 | 1989-12-22 | Image recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2862299B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5903296A (en) * | 1993-04-26 | 1999-05-11 | Dai Nippon Printing Co., Ltd. | Photoelectric sensor, information recording system and information recording and reproducing method |
-
1989
- 1989-12-22 JP JP33307889A patent/JP2862299B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5903296A (en) * | 1993-04-26 | 1999-05-11 | Dai Nippon Printing Co., Ltd. | Photoelectric sensor, information recording system and information recording and reproducing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2862299B2 (en) | 1999-03-03 |
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