JPH0292557A - Electrophotographic recording device - Google Patents
Electrophotographic recording deviceInfo
- Publication number
- JPH0292557A JPH0292557A JP63245415A JP24541588A JPH0292557A JP H0292557 A JPH0292557 A JP H0292557A JP 63245415 A JP63245415 A JP 63245415A JP 24541588 A JP24541588 A JP 24541588A JP H0292557 A JPH0292557 A JP H0292557A
- Authority
- JP
- Japan
- Prior art keywords
- support
- light
- photosensitive layer
- potential
- electrode
- 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
- 239000000758 substrate Substances 0.000 claims description 2
- 239000010408 film Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 14
- 238000000206 photolithography Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000010409 thin film Substances 0.000 abstract description 3
- 238000007740 vapor deposition Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 7
- 239000000463 material Substances 0.000 abstract 2
- 239000000470 constituent Substances 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000001947 vapour-phase growth Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
Landscapes
- 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)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electrophotographic recording device used in copying machines, printers, facsimile machines, 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 electrophotographic recording apparatuses, those using the so-called Carlson process have been widely put into practical use, but in recent years, electrophotographic recording apparatuses having recording principles different from the above-mentioned Carlson process have 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、例え
ば、特願昭６３−１６１３０７号明細書および図面に記
載されたものがある。As a recording method using the non-Carlson process, there is one described, for example, in the specification and drawings of Japanese Patent Application No. 161307/1983.
以下、この記録方法について説明する。This recording method will be explained below.
第３図において、１は透光性を有した第１の支持体、２
はこの第１の支持体と対向して設置された第２の支持体
、３は上記第１の支持体上に形成された背面電極、４は
この背面電極３上に形成された感光層、５はこの感光層
４上に部分的に形成された表面電極、６は上記第２の支
持体２上に形成された帯電電極、７は光源、８は上記第
１の支持体１と第２の支持体２との間に設置された記録
媒体、２１はトナー ２１ａはこのトナー２１の飛翔に
より上記記録媒体８上に形成されたトナー像である。In FIG. 3, 1 is a first support having translucency, 2
is a second support placed opposite to this first support; 3 is a back electrode formed on the first support; 4 is a photosensitive layer formed on this back electrode 3; 5 is a surface electrode partially formed on the photosensitive layer 4; 6 is a charging electrode formed on the second support 2; 7 is a light source; 8 is a surface electrode formed on the first support 1 and the second support 2; A recording medium 21 is a toner installed between the recording medium 2 and the support 2. A toner image 21a is a toner image formed on the recording medium 8 by the flying toner 21.
なお、背面電極３、表面電極５および帯電電極６は、そ
れぞれ第１の電位ｖｌ、第２の電位ｖ２および第３の電
位ｖ３に保たれている。Note that the back electrode 3, the front electrode 5, and the charging electrode 6 are maintained at a first potential vl, a second potential v2, and a third potential v3, respectively.
同図（ａ）は光が照射されていないとき（以下、暗時と
いう。）の状態を示したものである。Figure (a) shows the state when no light is irradiated (hereinafter referred to as dark time).
感光層４の表面電極５が形成されていない部分（以下、
感光層表面という。）の抵抗について考えると、同図の
ように感光層４の積層方向の抵抗Ｒｖｄと表面抵抗Ｒｓ
ｄの抵抗成分に分けることができる。感光層４の抵抗率
、膜厚および表面電極５が形成されていない部分の距離
を適当に選定して、Ｒｖｄ）Ｒｓｄとすれば、感光層４
表面の表面電位は、はぼ表面電極５の電位ｖ２と等しく
なる。従ってＶ２および■３の値を適当に選定して、帯
電電極６の電位ｖ３と上記表面電位（、Ｖ２ ）との電
位差（：ｌＶ３−Ｖ２ １）によって生じる電界を所定
の電界以下とし、上記電界によりトナー２１に働くクー
ロン力よりもトナー２１と帯電電極６との付着力の方が
大きくなるようにすれば、トナー２１が飛び出すことは
ない。The part of the photosensitive layer 4 where the surface electrode 5 is not formed (hereinafter referred to as
This is called the photosensitive layer surface. ), as shown in the figure, the resistance Rvd in the stacking direction of the photosensitive layer 4 and the surface resistance Rs
It can be divided into resistance components of d. If the resistivity, film thickness, and distance of the portion where the surface electrode 5 is not formed of the photosensitive layer 4 are appropriately selected and Rvd)Rsd, then the photosensitive layer 4
The surface potential of the surface becomes equal to the potential v2 of the surface electrode 5. Therefore, by appropriately selecting the values of V2 and ■3, the electric field generated by the potential difference (:lV3-V2 1) between the potential v3 of the charged electrode 6 and the above-mentioned surface potential (, V2) is set to a predetermined electric field or less, and the above-mentioned electric field If the adhesion force between the toner 21 and the charging electrode 6 is made larger than the Coulomb force acting on the toner 21, the toner 21 will not fly out.
同図（ｂ）は光を照射したとき（以下、明時という。）
の状態を示したものである。Figure (b) shows when light is irradiated (hereinafter referred to as bright time).
This shows the state of
光源７からの光が、第１の支持体１の裏面側から表面電
極５が形成されていない部分の感光層４に照射されると
、この部分の感光層４には光キャリアが発生するため、
積層方向の抵抗値はＲｖｐに減少する。−刃表面抵抗の
値Ｒｓｐはほとんど変化しない。すなわち、Ｒｖｐ （
Ｒｖｄ、 Ｒｓｐ＝Ｒｓｄと考えることができる。感光
層４の光照射時の抵抗率が適当な値であれば、Ｒｖｐ（
Ｒｓｌ）とすることができ、このとき感光層表面の表面
電位は、はぼ背面電極３の電位Ｖ１と等しくなる。従っ
て、ｖｌの値を適当に選定して、帯電電極６の電位Ｖ３
と、上記表面電位（、Ｖｌ）との電位差（−；１Ｖ３−
Ｖｌ １）によって生じる電界を所定の電界以上とし、
上記電界によりトナー２１に働くクーロン力が、トナー
２１と帯電電極６との付着力よりも大きくなるようにす
れば、トナー２１は帯電電極６を離れ、記録媒体８に向
かって飛翔し、記録媒体８にトナー像２１ａが形成され
る。When light from the light source 7 is irradiated from the back side of the first support 1 to a portion of the photosensitive layer 4 where the surface electrode 5 is not formed, photocarriers are generated in this portion of the photosensitive layer 4. ,
The resistance value in the stacking direction decreases to Rvp. - The value Rsp of the blade surface resistance hardly changes. That is, Rvp (
It can be considered that Rvd, Rsp=Rsd. If the resistivity of the photosensitive layer 4 when irradiated with light is an appropriate value, Rvp(
Rsl), and in this case, the surface potential of the surface of the photosensitive layer becomes approximately equal to the potential V1 of the back electrode 3. Therefore, by appropriately selecting the value of vl, the potential V3 of the charging electrode 6 is
and the potential difference (-; 1V3-) with the above surface potential (, Vl)
The electric field generated by Vl 1) is set to be higher than a predetermined electric field,
If the Coulomb force acting on the toner 21 due to the electric field is made larger than the adhesion force between the toner 21 and the charging electrode 6, the toner 21 will leave the charging electrode 6 and fly toward the recording medium 8. A toner image 21a is formed on 8.
実際に文字あるいは図形等をドツト表示するときには、
感光層等をライン状に形成し、各ドツトごとにトナー像
を形成してドツト表示を行っていた。When actually displaying characters or figures as dots,
A photosensitive layer and the like were formed in a line shape, and a toner image was formed for each dot to perform dot display.
［解決しようとする課題］
上記従来の記録装置では、第１の基板の反り等により光
源と感光層との距離がずれたときに、感光層に照射され
る光の照射範囲が広がることがある。そのため、トナー
像によるドツトが大きくなったりドツトの周縁部がぼけ
たりして、解像度が低下することがあった。[Problems to be Solved] In the conventional recording device described above, when the distance between the light source and the photosensitive layer deviates due to warpage of the first substrate, etc., the irradiation range of the light irradiated onto the photosensitive layer may expand. . As a result, the dots formed by the toner image become large or the peripheral edges of the dots become blurred, resulting in a decrease in resolution.
本発明は、上記従来の課題に対してなされたものであり
、解像度のよい電子写真記録装置を提供することを目的
としている。The present invention has been made to solve the above-mentioned conventional problems, and 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］
本発明は、透光性を有する第１の支持体と、この第１の
支持体に対向して設置された第２の支持体と、上記第１
の支持体の上記第２の支持体と対向した面側に形成され
、第１の電位に保持された背面電極と、少なくともこの
背面電極上に形成された感光層と、上記感光層上に部分
的に形成され、第２の電位に保持された表面電極と、上
記第２の支持体の上記第１の支持体と対向した面上に形
成され、第３の電位に保持された帯電電極と、上記第１
の支持体と第２の支持体の間に設置された記録媒体と、
上記第１の支持体の裏面側から上記感光層に光を照射し
、光が照射された部分の感光層の表面電位を変化させる
光源とを具備し、上記変化した感光層の表面電位と上記
帯電電極の電位差によって生じるクーロン力により、上
記帯電電極上に被着されたトナーを飛翔させ、上記記録
媒体に上記トナーを付着させて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に対し、（１）上記第１
の支持体と上記感光層との間に位置し、透光性部を囲む
ように形成された遮光膜が設けられており、
あるいは、
（２）上記背面電極が遮光性を有し、しかも透光性部を
囲むように形成されており、
上記透孔性部を通して上記感光層に光を照射する電子写
真記録装置により上記目的を達成するものである。[Means for Solving the Problems] The present invention includes a first support having translucency, a second support disposed opposite to the first support, and the first support.
a back electrode formed on the side facing the second support of the support and held at a first potential; a photosensitive layer formed at least on the back electrode; and a portion on the photosensitive layer. a surface electrode formed on the surface of the second support and held at a second potential, and a charging electrode formed on the surface of the second support facing the first support and held at a third potential. , the first
a recording medium installed between the support body and the second support body;
a light source that irradiates the photosensitive layer with light from the back side of the first support and changes the surface potential of the photosensitive layer in the portion irradiated with the light, and the changed surface potential of the photosensitive layer and the An electrophotographic recording device characterized in that the toner deposited on the charging electrode is caused to fly by Coulomb force generated by a potential difference between the charging electrodes, and the toner is deposited on the recording medium to form a toner image. , (1) Above first
A light-shielding film is provided between the support and the photosensitive layer and formed to surround the light-transmitting part, or (2) the back electrode has a light-shielding property and is transparent. The above object is achieved by an electrophotographic recording device that is formed so as to surround the photosensitive layer and irradiates the photosensitive layer with light through the transparent section.
［実施例］
以下、本発明における一実施例を図面に基いて説明する
。[Example] Hereinafter, an example of the present invention will be described based on the drawings.
実施例１
第１図は本発明における第１の実施例を示したものであ
る。Embodiment 1 FIG. 1 shows a first embodiment of the present invention.
同図において、１は透光性を有した第１の支持体、２は
この第１の支持体と対向して設置された第２の支持体、
３は上記第１の支持体上部に形成された透光性の背面電
極、４は少なくともこの背面電極３上に形成された感光
層、５はこの感光層４上に部分的に形成された表面電極
、６は上記第２の支持体２上に形成された帯電電極、７
は光源、８は上記第１の支持体１と第２の支持体２との
間に設置された記録媒体である。背面電極３、表面電極
５および帯電電極６は、それぞれ第１の電位Ｖ１、第２
の電位ｖ２および第３の電位Ｖ３に保たれている。これ
らは上記従来例と基本的には同様である。すなわち、本
例では、基本的な記録原理は上記従来例と同様である。In the same figure, 1 is a first support having a light-transmitting property, 2 is a second support installed opposite to this first support,
3 is a light-transmitting back electrode formed on the upper part of the first support, 4 is a photosensitive layer formed at least on this back electrode 3, and 5 is a surface partially formed on this photosensitive layer 4. Electrode 6 is a charging electrode 7 formed on the second support 2
8 is a light source, and 8 is a recording medium installed between the first support 1 and the second support 2. The back electrode 3, the front electrode 5, and the charged electrode 6 are at a first potential V1 and a second potential, respectively.
is maintained at a potential v2 and a third potential V3. These are basically the same as the above conventional example. That is, in this example, the basic recording principle is the same as the above-mentioned conventional example.
１１は上記感光層４上に複数設けられた導電性のフロー
ティング電極であり、これは上記従来例が記載されてい
る特願昭６３−１６１３０７号咀細書中で述べられてい
るように、トナー像による各ドツトの解像度を向上させ
るものである。９は上記第１の支持体上に形成され、透
光性部９ａを囲むように形成された遮光膜である。遮光
膜９は光源７がらの光を遮断するものであり、透光性部
９ａは光源７がらの光を透過するものである。すなわち
、遮光膜９および透光性部９ａは、光源７の光の波長に
より適宜決定されるものである。例えば、遮光膜９に金
属膜を用い、透光性部９ａはこの金属膜を開口形成すれ
ばよい。１２は上記遮光膜９上に形成された絶縁層であ
り、遮光膜９が導電性物質で形成されているときに、遮
光膜９と背面電極３あるいは感光層４とを電気的に絶縁
するものである。従って、遮光膜９が絶縁性物質で形成
されているときには、絶縁層１２は必ずしも必要ではな
い。Reference numeral 11 denotes a plurality of conductive floating electrodes provided on the photosensitive layer 4, which are used to conduct toner images, as described in the specification of Japanese Patent Application No. 161307/1983, in which the above-mentioned conventional example is described. This improves the resolution of each dot. Reference numeral 9 denotes a light-shielding film formed on the first support body so as to surround the light-transmitting portion 9a. The light shielding film 9 is for blocking light from the light source 7, and the light transmitting portion 9a is for transmitting the light from the light source 7. That is, the light-shielding film 9 and the light-transmitting portion 9a are appropriately determined depending on the wavelength of the light from the light source 7. For example, a metal film may be used as the light-shielding film 9, and the light-transmitting portion 9a may be formed by forming an opening in this metal film. Reference numeral 12 denotes an insulating layer formed on the light shielding film 9, which electrically insulates the light shielding film 9 from the back electrode 3 or the photosensitive layer 4 when the light shielding film 9 is formed of a conductive material. It is. Therefore, when the light shielding film 9 is formed of an insulating material, the insulating layer 12 is not necessarily required.
なお、第１図では、遮光膜９と絶縁層１２を空間約に離
して描いであるが、これは説明上各構成要素を見易くす
るためのものであり、実際には遮光膜９と絶縁層１２と
は密着している。In addition, in FIG. 1, the light shielding film 9 and the insulating layer 12 are drawn separated by about a space, but this is for the purpose of making it easier to see each component, and in reality, the light shielding film 9 and the insulating layer 12 are separated. It is closely related to 12.
本例では、光Ｒ７からの光が透光性部９ａを十分に透過
するように、光源７と透光性部９ａとの位置関係を整合
することが重要である。また、透光性部９ａを透過した
光源７からの光が適確にフローティング電極１１に照射
されることも、解像度を向上させるためには重要である
。In this example, it is important to match the positional relationship between the light source 7 and the transparent portion 9a so that the light from the light R7 is sufficiently transmitted through the transparent portion 9a. In addition, it is also important for the floating electrode 11 to be appropriately irradiated with the light from the light source 7 that has passed through the transparent portion 9a in order to improve the resolution.
なお、第１の支持体上の各構成要素は、蒸着法あるいは
気相成長法等の薄膜形成技術とフォトリングラフィ技術
により形成することが好ましい。Note that each component on the first support is preferably formed by a thin film forming technique such as a vapor deposition method or a vapor phase growth method, and a photolithography technique.
フォトリソグラフィ技術を用いることにより、透光性部
９ａとフローティング電極１１とを正確に整合させるこ
とができる。By using photolithography technology, the transparent portion 9a and the floating electrode 11 can be accurately aligned.
本例では、遮光膜９を設けたことにより、透光性部９ａ
を透過した光のみ感光層４に照射されるため、感光層４
に照射される光の照射範囲が広がることがなくなる。そ
のために、トナー像によるドツトが大きくなったり、ド
ツトの周縁部がぼけたりすることがなくなり、解像度が
大幅に向上する。In this example, by providing the light-shielding film 9, the light-transmitting portion 9a
The photosensitive layer 4 is irradiated with only the light that has passed through the photosensitive layer 4.
The irradiation range of the light irradiated on the area will not expand. Therefore, the dots caused by the toner image do not become large or the peripheral edges of the dots become blurred, and the resolution is significantly improved.
また、第１の支持体上の各構成要素をフォトリングラフ
ィ技術により形成すれば、透光性部９ａとフローティン
グ電極１１とを正確に整合させることができる。そのた
め、従来難しかった光源７とフローティング電極１１と
の位置合せの代りに、透光性部９ａとフローティング電
極１１との位置合せを行えばよく、光源７とフローティ
ング電極１１との位置合せを正確に行うことができる。Moreover, if each component on the first support is formed by photolithography technology, the transparent portion 9a and the floating electrode 11 can be accurately aligned. Therefore, instead of aligning the light source 7 and the floating electrode 11, which was difficult in the past, it is only necessary to align the transparent part 9a and the floating electrode 11, and the light source 7 and the floating electrode 11 can be aligned accurately. It can be carried out.
実施例２
第２図は本発明における第２の実施例を示したものであ
る。Embodiment 2 FIG. 2 shows a second embodiment of the present invention.
本例は、上記従来例の背面電極を改良したものであり、
基本的な記録原理は上記従来例と同様である。従って、
第２図と、従来例を示した第３図あるいは第１の実施例
を示した第１図とで、同一番号のもの・は同一のものを
指す。This example is an improved version of the back electrode of the conventional example,
The basic recording principle is the same as the above conventional example. Therefore,
In FIG. 2 and FIG. 3 showing the conventional example or FIG. 1 showing the first embodiment, the same numbers refer to the same things.
なお、第２図では、第１の支持体１および背面電極３と
感光層４とを空間的に離して描いであるが、これは説明
上各構成要素を見易くするためのものであり、実際には
第１の支持体１および背面電極３と感光層４とは密着し
ている。Note that in FIG. 2, the first support 1, the back electrode 3, and the photosensitive layer 4 are drawn spatially separated, but this is for the purpose of making each component easier to see for the purpose of explanation, and it is not necessary to actually The first support 1, the back electrode 3, and the photosensitive layer 4 are in close contact with each other.
本例は、背面電極３が遮光性を有し、透光性部３ａを囲
むように形成されたものである。遮光性を有した背面電
極３は光源７からの光を遮断するものであり、透光性部
９ａは光源７からの光を透過するものである。すなわち
、背面電極３および透光性部３ａは、光源７の光の波長
により適宜決定されるものである。例えば、背面電極３
に金属膜を用い、透光性部９ａはこの金属膜を開口形成
すればよい。In this example, the back electrode 3 has a light-shielding property and is formed so as to surround the light-transmitting part 3a. The light-shielding back electrode 3 blocks light from the light source 7, and the light-transmitting portion 9a transmits the light from the light source 7. That is, the back electrode 3 and the translucent portion 3a are appropriately determined depending on the wavelength of the light from the light source 7. For example, back electrode 3
A metal film may be used for the light-transmitting portion 9a by forming an opening in this metal film.
本例においては、光源７からの光が透光性部３ａを十分
に透過するように、光源７と透光性部３ａとの位置関係
を整合することが重要である。また、透光性部３ａを透
過した光源７からの光が適確にフローティング電極１１
に照射されることも、解像度を向上させるためには重要
である。In this example, it is important to match the positional relationship between the light source 7 and the transparent part 3a so that the light from the light source 7 is sufficiently transmitted through the transparent part 3a. Furthermore, the light from the light source 7 that has passed through the translucent portion 3a is accurately transmitted to the floating electrode 11.
Irradiation is also important for improving resolution.
なお、第１の支持体上の各構成要素は、蒸着法あるいは
気相成長法等の薄膜形成技術とフォトリソグラフィ技術
により形成することが好ましい。Note that each component on the first support is preferably formed by a thin film forming technique such as a vapor deposition method or a vapor phase growth method, and a photolithography technique.
フォトリソグラフィ技術を用いることにより、透光性部
３ａとフローティング電極１１とを正確に整合させるこ
とができる。By using photolithography technology, the transparent portion 3a and the floating electrode 11 can be accurately aligned.
本例では、背面電極３が遮光性を有し、透光性部３ａを
囲むように形成されているため、この透光性部３ａを透
過した光のみ感光層４に照射されるため、感光層４に照
射される光の照射範囲が広がることがなくなる。そのた
めに、トナー像によるドツトが大きくなったり、ドツト
の周縁部がぼけたりすることがなくなり、解像度が大幅
に向上する。In this example, since the back electrode 3 has a light-shielding property and is formed so as to surround the light-transmitting part 3a, only the light that has passed through the light-transmitting part 3a is irradiated onto the photosensitive layer 4. The irradiation range of the light irradiated onto the layer 4 will not be expanded. Therefore, the dots caused by the toner image do not become large or the peripheral edges of the dots become blurred, and the resolution is significantly improved.
また、第１の支持体上の各構成要素をフォトリソグラフ
ィ技術により形成すれば、透光性部３ａとフローティン
グ電極１１とを正確に整合させることができる。そのた
め、従来難しかった光源７とフローティング電極１１と
の位置合せの代りに、透光性部３ａとフローティング電
極１１との位置合せを行えばよく、光源７とフローティ
ング電極１１との位置合せを正確に行うことができる。Further, if each component on the first support is formed by photolithography, the transparent portion 3a and the floating electrode 11 can be accurately aligned. Therefore, instead of aligning the light source 7 and the floating electrode 11, which was difficult in the past, it is only necessary to align the transparent part 3a and the floating electrode 11, and the light source 7 and the floating electrode 11 can be aligned accurately. It can be carried out.
［効果］
本発明によれば、
（１）透光性部を囲むように形成された遮光膜を設けた
あるいは、
（２）背面電極が遮光性を有し、しかも透光性部を囲む
ように形成されている
ことにより、透光性部を透過した光のみ感光層に照射さ
れるため、感光層に照射される光の照射範囲が広がるこ
とがなくなる。そのために、トナー像によるドツトが大
きくなったりドツトの周縁部がぼけたりすることがなく
なり、解像度が大幅に向上する。[Effects] According to the present invention, (1) a light-shielding film formed so as to surround a light-transmitting part is provided, or (2) a back electrode has a light-shielding property and is formed so as to surround a light-transmitting part. Since only the light that has passed through the light-transmitting portion is irradiated onto the photosensitive layer, the irradiation range of the light irradiated onto the photosensitive layer does not widen. Therefore, the dots caused by the toner image do not become large or the peripheral edges of the dots become blurred, and the resolution is significantly improved.
第１図は本発明の第１の実施例を示した斜視図、第２図
は本発明の第２の実施例を示した斜視図、第３図は従来
例を示した説明図である。
１・・・・・・第１の支持体
２・・・・・・第２の支持体
３・・・・・・背面電極
第１図
４・・・・・・感光層
５・・・・・・表面電極
６・・・・・・帯電電極
７・・・・・・光源
８・・・・・・記録媒体
９・・・・・・遮光膜
３ａ・・・透光性部
９ａ・・・透光性部
以上
出 願 人 株式会社精工舎FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a perspective view showing a second embodiment of the invention, and FIG. 3 is an explanatory diagram showing a conventional example. 1...First support 2...Second support 3...Back electrode Fig. 1 4...Photosensitive layer 5... ...Surface electrode 6...Charged electrode 7...Light source 8...Recording medium 9...Light shielding film 3a...Transparent part 9a...・Applicant for translucent part and above: Seikosha Co., Ltd.
Claims (2)
、 上記第１の支持体の上記第２の支持体と対向した面側に
形成され、第１の電位に保持された背面電極と、 少なくともこの背面電極上に形成された感光層と、 上記第１の支持体と上記感光層との間に位置し、透光性
部を囲むように形成された遮光膜と、上記感光層上に部
分的に形成され、第２の電位に保持された表面電極と、 上記第２の支持体の上記第１の支持体と対向した面上に
形成され、第３の電位に保持された帯電電極と、 上記第１の支持体と第２の支持体の間に設置された記録
媒体と、 上記第１の支持体の裏面側から上記透光性部を通して上
記感光層に光を照射し、光が照射された部分の感光層の
表面電位を変化させる光源とを具備し、 上記変化した感光層の表面電位と上記帯電電極の電位差
によって生じるクーロン力により、上記帯電電極上に被
着されたトナーを飛翔させ、上記記録媒体に上記トナー
を付着させて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 translucency, a second support installed opposite to the first support, and facing the second support of the first support. a back electrode formed on the surface of the substrate and held at a first potential; a photosensitive layer formed at least on the back electrode; and a transparent layer located between the first support and the photosensitive layer. a light-shielding film formed to surround the photosensitive part; a surface electrode partially formed on the photosensitive layer and held at a second potential; and the first support of the second support. a charging electrode formed on a surface facing the first support and held at a third potential; a recording medium installed between the first support and the second support; a light source that irradiates light to the photosensitive layer from the back side through the light-transmitting portion and changes the surface potential of the photosensitive layer in the irradiated portion, and the surface potential of the photosensitive layer that has changed and the charging An electrophotographic recording apparatus characterized in that the toner deposited on the charging electrode is caused to fly by a Coulomb force generated by a potential difference between the electrodes, and the toner is deposited on the recording medium to form a toner image.
、 上記第１の支持体の上記第２の支持体と対向した面側に
、透光性部を囲むように形成され、第１の電位に保持さ
れた遮光性の背面電極と、 少なくともこの背面電極上に形成された感光層と、 この感光層上に部分的に形成され、第２の電位に保持さ
れた表面電極と、 上記第２の支持体の上記第１の支持体と対向した面上に
形成され、第３の電位に保持された帯電電極と、 上記第１の支持体と第２の支持体の間に設置された記録
媒体と、 上記第１の支持体の裏面側から上記透光性部を通して上
記感光層に光を照射し、光が照射された部分の感光層の
表面電位を変化させる光源とを具備し、 上記変化した感光層の表面電位と上記帯電電極の電位差
によって生じるクーロン力により、上記帯電電極上に被
着されたトナーを飛翔させ、上記記録媒体に上記トナー
を付着させて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。(2) a first support having translucency, a second support installed opposite to the first support, and opposite to the second support of the first support; a light-shielding back electrode formed so as to surround the light-transmitting part and held at a first potential; a photosensitive layer formed at least on the back electrode; and a portion on the photosensitive layer. a surface electrode formed at a second potential and held at a second potential; and a charged electrode formed on a surface of the second support facing the first support and held at a third potential. , a recording medium placed between the first support and the second support; and light is irradiated from the back side of the first support through the light-transmitting part to the photosensitive layer. and a light source that changes the surface potential of the photosensitive layer in the irradiated area, and the toner deposited on the charged electrode is removed by the Coulomb force generated by the difference in potential between the changed surface potential of the photosensitive layer and the charged electrode. An electrophotographic recording apparatus characterized in that a toner image is formed by causing the toner to fly and adhere to the recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245415A JPH0688424B2 (en) | 1988-09-29 | 1988-09-29 | Electrophotographic recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245415A JPH0688424B2 (en) | 1988-09-29 | 1988-09-29 | Electrophotographic recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292557A true JPH0292557A (en) | 1990-04-03 |
| JPH0688424B2 JPH0688424B2 (en) | 1994-11-09 |
Family
ID=17133315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63245415A Expired - Lifetime JPH0688424B2 (en) | 1988-09-29 | 1988-09-29 | Electrophotographic recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688424B2 (en) |
Citations (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
- 1988-09-29 JP JP63245415A patent/JPH0688424B2/en not_active Expired - Lifetime
Patent Citations (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0688424B2 (en) | 1994-11-09 |
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