JPH0688422B2 - Electrophotographic recording device - Google Patents
Electrophotographic recording deviceInfo
- Publication number
- JPH0688422B2 JPH0688422B2 JP63240060A JP24006088A JPH0688422B2 JP H0688422 B2 JPH0688422 B2 JP H0688422B2 JP 63240060 A JP63240060 A JP 63240060A JP 24006088 A JP24006088 A JP 24006088A JP H0688422 B2 JPH0688422 B2 JP H0688422B2
- Authority
- JP
- Japan
- Prior art keywords
- potential
- photosensitive layer
- light
- irradiated
- support
- 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
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G17/00—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、複写機、プリンタ、ファクシミリ等に用いら
れる電子写真記録装置に関するものである。TECHNICAL FIELD The present invention relates to an electrophotographic recording device used in a copying machine, a printer, a facsimile, and the like.
［従来の技術］ 電子写真記録装置としては、いわゆるカールソンプロセ
スを用いたものが広く実用化されているが、近年上記カ
ールソンプロセスとは異なった記録原理を有したものも
研究されている。[Prior Art] As an electrophotographic recording apparatus, one using a so-called Carlson process has been widely put into practical use, but in recent years, an apparatus having a recording principle different from the above-mentioned Carlson process has also been studied.
上記非カールソンプロセスによる記録方法としては、例
えば特開昭61−256358号公報に記載されたものがある。An example of the recording method using the non-Carlson process is described in Japanese Patent Application Laid-Open No. 61-256358.
以下この記録方法について、第５図（側面図）、第６図
（正面図）を用いて説明を行う。This recording method will be described below with reference to FIG. 5 (side view) and FIG. 6 (front view).
同図において、11は感光ユニットであり、これは、透光
性を有する支持体11a、裏面電極11b、感光層11c、帯電
電極11dにより形成され、上記裏面電極11bおよび帯電電
極11dは所定の直流電位に保たれている。12は所定の直
流電位に保たれた背面電極、13は記録紙等を用いた記録
媒体、16はトナーである。In the figure, 11 is a photosensitive unit, which is formed of a transparent support 11a, a back surface electrode 11b, a photosensitive layer 11c, and a charging electrode 11d, and the back surface electrode 11b and the charging electrode 11d have a predetermined direct current Is kept in place. Reference numeral 12 is a back electrode kept at a predetermined DC potential, 13 is a recording medium using recording paper, and 16 is toner.
光14が上記感光層11cに照射されると、光14が照射され
た部分の上記感光層11cの抵抗が下がり、その結果上記
トナー16に働く電界が強まり、クーロンカにより上記ト
ナー16が上記記録媒体13に向かって飛翔し、記録媒体13
上にトナー像16aが形成され、記録が行われる。When the light 14 is irradiated on the photosensitive layer 11c, the resistance of the photosensitive layer 11c in the portion irradiated with the light 14 is lowered, and as a result, the electric field acting on the toner 16 is strengthened, and the toner 16 is transferred to the recording medium by a coulomber. Flying toward 13, recording medium 13
The toner image 16a is formed on the upper side, and recording is performed.
［解決しようとする課題］ 上記従来の電子写真記録装置では、光照射により飛翔す
るトナー16には放射状の電界が働き、トナー16は上記電
界に従い放射状に飛翔する。従って記録媒体13に付着し
たトナー像16aは、像が大きくなる、あるいは像の周辺
がぼけるため、上記従来の電子写真記録装置では解像度
のよい記録を得ることができなかった。[Problems to be Solved] In the above-described conventional electrophotographic recording apparatus, a radial electric field acts on the toner 16 flying by light irradiation, and the toner 16 flies radially according to the electric field. Therefore, the toner image 16a adhering to the recording medium 13 becomes large in size or the periphery of the image is blurred, so that the above-mentioned conventional electrophotographic recording apparatus cannot obtain high-resolution recording.
本発明の目的は、解像度のよい電子写真記録装置を提供
することである。An object of the present invention is to provide an electrophotographic recording device with good resolution.
［課題を解決するための手段］ 本発明における電子写真記録装置は、透光性を有する第
１の支持体と、この第１の支持体上に形成され第１の電
位に保たれた透光性を有する第１の裏面電極と、この第
１の裏面電極上に形成され第１の表面領域およびこの第
１の表面領域と離間した第２の表面領域を有する第１の
感光層と、この第１の感光層の上記第２の表面領域上に
形成され第２の電位に保たれた第１の帯電電極とを有す
る第１の感光ユニットと、透光性を有する第２の支持体
と、この第２の支持体上に形成され第３の電位に保たれ
た透光性を有する第２の裏面電極と、この第２の裏面電
極上に形成され第３の表面領域およびこの第３の表面領
域と離間した第４の表面領域を有する第２の感光層と、
この第２の感光層の上記第４の表面領域上に形成され第
４の電位に保たれた第２の帯電電極とを有し、上記第１
の表面領域と上記第３の表面領域とを対応させて上記第
２の感光層が上記第１の感光層に対向するように設置さ
れた第２の感光ユニットと、上記第１の感光ユニットの
上記第１の支持体側から上記第１の感光層の上記第１の
表面領域に対応する領域に第１の光を照射する第１の光
源と、上記第１の光源に対応して設けられ、上記第２の
感光ユニットの上記第２の支持体側から上記第２の感光
層の上記第３の表面領域に対応する領域に第２の光を照
射する第２の光源とを有し、上記第１の電位と上記第３
の電位との差の絶対値が所定の電位差よりも大きく、上
記第１の電位と上記第４の電位との差の絶対値、上記第
２の電位と上記第３の電位との差の絶対値および上記第
２の電位と上記第４の電位との差の絶対値のいずれもが
上記所定の電位差よりも小さくなるように、上記第１、
第２、第３および第４の電位が設定され、上記第１の光
が上記第１の感光層に照射された場合には上記第１の光
が照射された部分の上記第１の感光層の上記第１の表面
領域の電位を上記第１の裏面電極の電位と略等しい電位
にするとともに、上記第１の光が上記第１の感光層に照
射されない場合には上記第１の感光層の上記第１の表面
領域の電位を上記第１の帯電電極の電位と略等しい電位
にするように構成され、上記第２の光が上記第２の感光
層に照射された場合には上記第２の光が照射された部分
の上記第２の感光層の上記第３の表面領域の電位を上記
第２の裏面電極の電位と略等しい電位にするとともに、
上記第２の光が上記第２の感光層に照射されない場合に
は上記第２の感光層の上記第３の表面領域の電位を上記
第２の帯電電極の電位と略等しい電位にするように構成
され、上記第１の光が上記第１の感光層に照射されかつ
上記第２の光が上記第２の感光層に照射された場合に、
上記第１の光が照射された部分の上記第１の感光層の上
記第１の表面領域上のトナーを上記第２の光が照射され
た部分の上記第２の感光層の上記第３の表面領域に向か
って飛翔させることにより、上記第１の感光ユニットと
第２の感光ユニットとの間の記録媒体上にトナー像を形
成することを特徴とする。[Means for Solving the Problems] An electrophotographic recording apparatus according to the present invention includes a first support having a light-transmitting property, and a light-transmitting light formed on the first support and kept at a first potential. And a first photosensitive layer having a first surface area formed on the first back surface electrode and a second surface area separated from the first surface area, and A first photosensitive unit having a first charging electrode formed on the second surface region of the first photosensitive layer and kept at a second potential; and a second support having a light-transmitting property. A second back electrode having a light-transmitting property formed on the second support and kept at a third potential, and a third front surface region formed on the second back electrode and the third back surface electrode. A second photosensitive layer having a fourth surface area spaced from the surface area of
A second charging electrode formed on the fourth surface region of the second photosensitive layer and held at a fourth potential;
Of the first photosensitive unit and a second photosensitive unit which is installed so that the second photosensitive layer faces the first photosensitive layer by making the surface area of the first photosensitive layer correspond to the third surface area of the first photosensitive unit. A first light source for irradiating a region corresponding to the first surface region of the first photosensitive layer with the first light from the side of the first support; and a first light source provided corresponding to the first light source, A second light source for irradiating second light from a side of the second support of the second photosensitive unit to a region of the second photosensitive layer corresponding to the third surface region, and 1 potential and the third above
The absolute value of the difference between the first potential and the fourth potential is larger than the predetermined potential difference, and the absolute value of the difference between the second potential and the third potential is absolute. The first and second electric potentials are set so that both the value and the absolute value of the difference between the second electric potential and the fourth electric potential are smaller than the predetermined electric potential difference.
When the second, third, and fourth potentials are set and the first light is irradiated on the first photosensitive layer, the first photosensitive layer in the part irradiated with the first light The potential of the first front surface region of the first back surface electrode is approximately equal to the potential of the first back surface electrode, and the first photosensitive layer is exposed when the first light is not applied to the first photosensitive layer. Is configured to have a potential substantially equal to that of the first charging electrode, and the second light is applied to the second photosensitive layer. The potential of the third surface region of the second photosensitive layer in the portion irradiated with light 2 is set to a potential substantially equal to the potential of the second back electrode, and
When the second light is not applied to the second photosensitive layer, the potential of the third surface area of the second photosensitive layer is set to be substantially equal to the potential of the second charging electrode. And wherein the first light is applied to the first photosensitive layer and the second light is applied to the second photosensitive layer,
The toner on the first surface area of the first photosensitive layer in the portion irradiated with the first light is added to the toner on the third surface of the second photosensitive layer in the portion irradiated with the second light. By flying toward the surface area, a toner image is formed on the recording medium between the first photosensitive unit and the second photosensitive unit.
［実施例］ 以下図面に基き、本発明における一実施例の説明を行
う。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
第１図（側面図）、第２図（正面図）、第３図（斜視
図）において、１は第１の感光ユニットで、これは、透
光性を有する第１の支持体1a、透光性を有し所定の直流
電位（V1b）に保たれた第１の裏面電極1b、非晶質シリ
コン等を用いた第１の感光層1c、および所定の直流電位
（V1d）に保たれた第１の帯電電極1dより成る。２は第
２の感光ユニットで、これは、透光性を有する第２の支
持体2a、透光性を有し所定の直流電位（V2b）に保たれ
た第２の裏面電極2b、非晶質シリコン等を用いた第２の
感光層2c、および所定の直流電位（V2d）に保たれた第
２の帯電電極2dより成る。３は上記第１の感光ユニット
１と第２の感光ユニット２との間に設置された記録紙等
の記録媒体、６は上記第１の感光層1c上および第１の帯
電電極1dに被着されたトナーである。In FIG. 1 (side view), FIG. 2 (front view), and FIG. 3 (perspective view), 1 is a first photosensitive unit, which is a light-transmitting first support 1a, a transparent unit 1a. The first back surface electrode 1b, which has optical property and is kept at a predetermined direct current potential (V1b), the first photosensitive layer 1c made of amorphous silicon or the like, and is kept at a predetermined direct current potential (V1d) It comprises a first charging electrode 1d. Reference numeral 2 denotes a second photosensitive unit, which is a second support 2a having a light transmitting property, a second back electrode 2b having a light transmitting property and kept at a predetermined DC potential (V2b), and an amorphous material. It comprises a second photosensitive layer 2c made of high-quality silicon or the like, and a second charging electrode 2d kept at a predetermined DC potential (V2d). Reference numeral 3 is a recording medium such as recording paper installed between the first photosensitive unit 1 and the second photosensitive unit 2, and 6 is attached on the first photosensitive layer 1c and the first charging electrode 1d. It is the toner that has been removed.
まず、第１の光源４からの第１の光4aおよび第２の光源
５からの第２の光5aが共に照射されていないときは、第
１の感光層1cの表面電位Vs1dは第１の帯電電極1dの電位
V1dとほゞ等しく（Vs1d〜V1d）、第２の感光層2cの表面
電位Vs2dは第２の帯電電極2dの電位V2dと、ほゞ等しく
（Vs2d〜V2d）、トナー６は飛翔することはない。First, when neither the first light 4a from the first light source 4 nor the second light 5a from the second light source 5 is irradiated, the surface potential Vs1d of the first photosensitive layer 1c is Charged electrode 1d potential
V1d is approximately equal (Vs1d to V1d), the surface potential Vs2d of the second photosensitive layer 2c is approximately equal to the potential V2d of the second charging electrode 2d (Vs2d to V2d), and the toner 6 does not fly. .
一方、第１の光4aおよび第２の光5aが共に照射される
と、第１の感光層1cおよび第２の感光層2cの抵抗が大幅
に低くなり、上記第１の光4aおよび第２の光5aが照射さ
れた部分の上記第１の感光層1cの表面抵抗Vs1pおよび第
２の感光層2cの表面抵抗Vs2pは、それぞれほゞ第１の裏
面電極の電位V1bおよび第２の裏面電極の電位V2bに等し
くなる（Vs1p〜V1b、Vs2p〜V2b）。また、光が照射され
ていない部分の第１の感光層1cおよび第２の感光層2cの
表面抵抗は、それぞれ、ほゞ第１の帯電電極1dの電位V1
dおよび第２の帯電電極2dの電位V2dのまゝである。従っ
て、第１の光4aが照射された部分の第１の感光層1cの表
面電位（Vs1p〜V1b）と、第２の光5aが照射された部分
の第２の感光層2cの表面電位（Vs2p〜V2b）との電位差|
Vs1p−Vs2p|（〜|V1b−V2b|）が、トナー６が飛翔する
のに十分な電位差であり、他の部分では、トナー６が飛
翔できない電位差であれば、トナー６は第１の光4aが照
射された部分の第１の感光層1cの表面から第２の光5aが
照射された部分の第２の感光層2cの表面に向かってのみ
飛翔するため、トナー６は放射状に発散せずに飛翔し、
記録媒体３上には、周辺のぼけ等が大幅に低減した解像
度のよいトナー像6aが記録される。On the other hand, when both the first light 4a and the second light 5a are irradiated, the resistances of the first photosensitive layer 1c and the second photosensitive layer 2c are significantly reduced, and the first light 4a and the second light 4a are The surface resistance Vs1p of the first photosensitive layer 1c and the surface resistance Vs2p of the second photosensitive layer 2c of the portion irradiated with the light 5a are approximately the potential V1b of the first backside electrode and the second backside electrode, respectively. Potential (Vs1p to V1b, Vs2p to V2b). In addition, the surface resistances of the first photosensitive layer 1c and the second photosensitive layer 2c in the portions not irradiated with light are about the potential V1 of the first charging electrode 1d, respectively.
d and the potential V2d of the second charging electrode 2d. Therefore, the surface potential (Vs1p to V1b) of the first photosensitive layer 1c in the portion irradiated with the first light 4a and the surface potential (Vs1p to V1b) of the second photosensitive layer 2c in the portion irradiated with the second light 5a ( Vs2p ~ V2b) potential difference |
If Vs1p−Vs2p | (˜ | V1b−V2b |) is a potential difference sufficient for the toner 6 to fly, and if the potential difference that the toner 6 cannot fly in the other portions, the toner 6 is the first light 4a. The toner 6 does not radiate in a radial direction because it flies only from the surface of the first photosensitive layer 1c in the portion irradiated with to the surface of the second photosensitive layer 2c in the portion irradiated with the second light 5a. Flew to
On the recording medium 3, a toner image 6a with good resolution in which blurring around the periphery is greatly reduced is recorded.
上記トナーの飛翔条件、すなわち、第１の光4aが照射さ
れた部分から第２の光5aが照射された部分にのみトナー
が飛翔するためには、トナーが飛翔するための最小電位
差をVtとし、第１図に示した各電位を用いると、次式が
成立すればよい。In order to cause the toner to fly only from the portion irradiated with the first light 4a to the portion irradiated with the second light 5a, the minimum potential difference for the toner to fly is defined as Vt. , If the respective potentials shown in FIG. 1 are used, the following equation may be satisfied.
|V1b−V2b|＞Vt |V1b−V2d|＜Vt |V1d−V2b|＜Vt |V1d−V2d|＜Vt なお、第１の光4aおよび第２の光5aは、それぞれ第１の
感光層１および第２の感光層2cに対して垂直に入射し、
しかも両光の光軸が一致することが好ましい。| V1b-V2b |> Vt | V1b-V2d | <Vt | V1d-V2b | <Vt | V1d-V2d | <Vt The first light 4a and the second light 5a are the first photosensitive layer 1 respectively. And vertically incident on the second photosensitive layer 2c,
Moreover, it is preferable that the optical axes of the two lights coincide with each other.
ところで、本実施例とは逆に第１の光4aが照射された部
分から第２の光5aが照射されない部分へとトナーを飛翔
させる（従って第２の光が照射された部分へはトナーは
飛翔しない。）ものも考えられるが、本実施例のように
第１の光4aが照射された部分から第２の光5aが照射され
た部分へとトナーを飛翔させるものの方が好ましい。By the way, contrary to the present embodiment, the toner is made to fly from the portion irradiated with the first light 4a to the portion not irradiated with the second light 5a (thus, the toner is not transferred to the portion irradiated with the second light). Although it does not fly, it is preferable that the toner is made to fly from the portion irradiated with the first light 4a to the portion irradiated with the second light 5a as in the present embodiment.
第４図は、本発明の有効性を確かめるために行った計算
機シミュレーション結果の大略を示したものである（モ
デリングの簡単化のために記録媒体は省いている。）。FIG. 4 shows an outline of the results of computer simulation performed to confirm the effectiveness of the present invention (the recording medium is omitted for simplification of modeling).
同図（ａ）は従来例に対応したものであり、（ｂ）は本
発明に対応したものである。The figure (a) corresponds to the conventional example, and the figure (b) corresponds to the present invention.
トナーの飛翔は実線で示したように、同図（ａ）では放
射状であるのに対し、同図（ｂ）ではほとんど垂直であ
る。特に同図（ｂ）では点線で示した電界Ｅの効果によ
り、飛翔が絞り込まれるようになっている。As shown by the solid line, the toner flight is radial in FIG. 9A, but almost vertical in FIG. In particular, in the figure (b), the flight is narrowed down by the effect of the electric field E shown by the dotted line.
以上のシミュレーション結果から、本発明の有効性、す
なわち、高解像度のトナー像形成が実現できることがわ
かる。From the above simulation results, it can be seen that the effectiveness of the present invention, that is, high-resolution toner image formation can be realized.
［発明の効果］ 本発明における電子写真記録装置では、トナーを放射状
に発散させずに飛翔させることが可能となり、記録媒体
上に解像度のよいトナー像を形成することが可能とな
る。[Advantages of the Invention] In the electrophotographic recording apparatus of the present invention, it is possible to fly the toner without radially diverging it, and it is possible to form a toner image with good resolution on the recording medium.
第１図、第２図および第３図は本発明における一実施例
を示した側面図、正面図および斜視図、第４図は従来例
および本発明におけるトナーの飛翔のシミュレーション
結果を示した説明図、第５図および第６図それぞれは従
来例の側面図および正面図である。 １……第１の感光ユニット 1a……第１の支持体 1b……第１の裏面電極 1c……第１の感光層 1d……第１の帯電電極 ２……第２の感光ユニット 2a……第２の支持体 2b……第２の裏面電極 2c……第２の感光層 2d……第２の帯電電極 ３……記録媒体 ４……第１の光源 4a……第１の光 ５……第２の光源 5a……第２の光 ６……トナー 6a……トナー像 V1b……第１の電位 V1d……第２の電位 V2b……第３の電位 V2d……第４の電位FIGS. 1, 2 and 3 are side views, front views and perspective views showing an embodiment of the present invention, and FIG. 4 is an explanation showing results of toner flying simulation in a conventional example and the present invention. FIG. 5, FIG. 5 and FIG. 6 are respectively a side view and a front view of a conventional example. 1 ... First photosensitive unit 1a ... First support 1b ... First back surface electrode 1c ... First photosensitive layer 1d ... First charging electrode 2 ... Second photosensitive unit 2a ... Second support 2b Second back electrode 2c Second photosensitive layer 2d Second charging electrode 3 Recording medium 4 First light source 4a First light 5 ...... Second light source 5a ...... Second light 6 ...... Toner 6a ...... Toner image V1b ...... First potential V1d ...... Second potential V2b ...... Third potential V2d ...... Fourth potential
Claims (1)
の支持体上に形成され第１の電位に保たれた透光性を有
する第１の裏面電極と、この第１の裏面電極上に形成さ
れ第１の表面領域およびこの第１の表面領域と離間した
第２の表面領域を有する第１の感光層と、この第１の感
光層の上記第２の表面領域上に形成され第２の電位に保
たれた第１の帯電電極とを有する第１の感光ユニット
と、 透光性を有する第２の支持体と、この第２の支持体上に
形成され第３の電位に保たれた透光性を有する第２の裏
面電極と、この第２の裏面電極上に形成され第３の表面
領域およびこの第３の表面領域と離間した第４の表面領
域を有する第２の感光層と、この第２の感光層の上記第
４の表面領域上に形成され第４の電位に保たれた第２の
帯電電極とを有し、上記第１の表面領域と上記第３の表
面領域とを対応させて上記第２の感光層が上記第１の感
光層に対向するように設置された第２の感光ユニット
と、 上記第１の感光ユニットの上記第１の支持体側から上記
第１の感光層の上記第１の表面領域に対応する領域に第
１の光を照射する第１の光源と、 上記第１の光源に対応して設けられ、上記第２の感光ユ
ニットの上記第２の支持体側から上記第２の感光層の上
記第３の表面領域に対応する領域に第２の光を照射する
第２の光源とを有し、 上記第１の電位と上記第３の電位との差の絶対値が所定
の電位差よりも大きく、上記第１の電位と上記第４の電
位との差の絶対値、上記第２の電位と上記第３の電位と
の差の絶対値および上記第２の電位と上記第４の電位と
の差の絶対値のいずれもが上記所定の電位差よりも小さ
くなるように、上記第１、第２、第３および第４の電位
が設定され、 上記第１の光が上記第１の感光層に照射された場合には
上記第１の光が照射された部分の上記第１の感光層の上
記第１の表面領域の電位を上記第１の裏面電極の電位と
略等しい電位にするとともに、上記第１の光が上記第１
の感光層に照射されない場合には上記第１の感光層の上
記第１の表面領域の電位を上記第１の帯電電極の電位と
略等しい電位にするように構成され、 上記第２の光が上記第２の感光層に照射された場合には
上記第２の光が照射された部分の上記第２の感光層の上
記第３の表面領域の電位を上記第２の裏面電極の電位と
略等しい電位にするとともに、上記第２の光が上記第２
の感光層に照射されない場合には上記第２の感光層の上
記第３の表面領域の電位を上記第２の帯電電極の電位と
略等しい電位にするように構成され、 上記第１の光が上記第１の感光層に照射されかつ上記第
２の光が上記第２の感光層に照射された場合に、上記第
１の光が照射された部分の上記第１の感光層の上記第１
の表面領域上のトナーを上記第２の光が照射された部分
の上記第２の感光層の上記第３の表面領域に向かって飛
翔させることにより、上記第１の感光ユニットと第２の
感光ユニットとの間の記録媒体上にトナー像を形成する ことを特徴とする電子写真記録装置。1. A first support having a light-transmitting property, and the first support.
A first rear surface electrode formed on the support and having a first electric potential and having a light-transmitting property, a first front surface region formed on the first rear surface electrode, and the first front surface region. A first photosensitive layer having a spaced second surface region and a first charging electrode formed on the second surface region of the first photosensitive layer and held at a second potential. 1, a light-transmitting second support, a light-transmitting second back electrode formed on the second support and kept at a third potential, and a second light-transmitting second support. A second photosensitive layer formed on the second back surface electrode and having a third surface area and a fourth surface area separated from the third surface area; and the fourth surface area of the second photosensitive layer. A second charging electrode formed on the upper surface and kept at a fourth potential, and corresponding to the first surface area and the third surface area. And a second photosensitive unit arranged so that the second photosensitive layer faces the first photosensitive layer, and the first photosensitive layer from the first support side of the first photosensitive unit. A first light source for irradiating a region corresponding to the first surface region with the first light; and a second support unit of the second photosensitive unit provided corresponding to the first light source. To a second light source for irradiating the second light to a region corresponding to the third surface region of the second photosensitive layer, and a difference between the first potential and the third potential. The absolute value is greater than a predetermined potential difference, and the absolute value of the difference between the first potential and the fourth potential, the absolute value of the difference between the second potential and the third potential, and the second potential. The first and the first potentials are set so that both absolute values of the difference between the potential and the fourth potential are smaller than the predetermined potential difference. , The third and fourth potentials are set, and when the first light is irradiated on the first photosensitive layer, the portion of the first photosensitive layer on which the first light is irradiated is The potential of the first front surface region is set to a potential substantially equal to the potential of the first back surface electrode, and the first light emits the first light.
When the second photosensitive layer is not irradiated, the potential of the first surface region of the first photosensitive layer is set to a potential substantially equal to the potential of the first charging electrode, and the second light is When the second photosensitive layer is irradiated, the potential of the third surface region of the second photosensitive layer in the portion irradiated with the second light is approximately equal to the potential of the second back surface electrode. With the same potential, the second light is
When the second photosensitive layer is not irradiated, the potential of the third surface region of the second photosensitive layer is set to a potential substantially equal to the potential of the second charging electrode. When the first photosensitive layer is irradiated with the second light and the second photosensitive layer is irradiated with the second light, the portion of the first photosensitive layer where the first light is irradiated is the first of the first photosensitive layer.
Of the toner on the surface area of the second photosensitive layer is made to fly toward the third surface area of the second photosensitive layer in the portion irradiated with the second light, whereby the first photosensitive unit and the second photosensitive layer are exposed. An electrophotographic recording apparatus, which forms a toner image on a recording medium between the unit and the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63240060A JPH0688422B2 (en) | 1988-09-26 | 1988-09-26 | Electrophotographic recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63240060A JPH0688422B2 (en) | 1988-09-26 | 1988-09-26 | Electrophotographic recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288254A JPH0288254A (en) | 1990-03-28 |
| JPH0688422B2 true JPH0688422B2 (en) | 1994-11-09 |
Family
ID=17053887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63240060A Expired - Lifetime JPH0688422B2 (en) | 1988-09-26 | 1988-09-26 | Electrophotographic recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688422B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145160A (en) * | 1983-02-08 | 1984-08-20 | Canon Inc | Image recording apparatus |
| JPS62156674A (en) * | 1985-12-27 | 1987-07-11 | Seikosha Co Ltd | Electrophotographic recorder |
-
1988
- 1988-09-26 JP JP63240060A patent/JPH0688422B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0288254A (en) | 1990-03-28 |
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