DE1797608C2 - Electrophotographic process for generating a charge image on an insulating layer - Google Patents
Electrophotographic process for generating a charge image on an insulating layerInfo
- Publication number
- DE1797608C2 DE1797608C2 DE19661797608 DE1797608A DE1797608C2 DE 1797608 C2 DE1797608 C2 DE 1797608C2 DE 19661797608 DE19661797608 DE 19661797608 DE 1797608 A DE1797608 A DE 1797608A DE 1797608 C2 DE1797608 C2 DE 1797608C2
- Authority
- DE
- Germany
- Prior art keywords
- charge
- layer
- photoconductive
- polarity
- image
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/045—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/226—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 where the image is formed on a dielectric layer covering the photoconductive layer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/08—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic
- G03G5/087—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic and being incorporated in an organic bonding material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
Die Erfindung bezieht sich auf ein elektrophotographisches Verfahren gemäß Oberbegriff des Patentanspruches. The invention relates to an electrophotographic method according to the preamble of the patent claim.
Ein solches Verfahren ist Gegenstand des Hauptpatentes 15 22 567,9.Such a process is the subject of main patent 15 22 567.9.
Mit dem Verfahren nach dem Hauptpatent lassen sich Ladungsbilder mit hohem elektrostatischen Kontrast auch dann erreichen, wenn mit vergleichsweise dicken, isolierenden Deckschichten gearbeitet wird, die demzufolge eine lange Lebensdauer bei wiederholtem Gebrauch sicherzustellen vermögen.With the method according to the main patent, charge images with high electrostatic contrast can be created Achieve even when working with comparatively thick, insulating cover layers, which consequently are able to ensure a long service life with repeated use.
Aufgabe der Erfindung ist es nun, das Verfahren nach dem Hauptpatent im Hinblick auf einen besonders guten Kontrast weiterzubilden.The object of the invention is now the method according to the main patent with a view to a particular good contrast.
Gemäß der Erfindung wird dieses für das einleitend beschriebene Verfahren durch die im Kennzeichen des Patentanspruches angegebenen Maßnahmen erreichtAccording to the invention, this is for the method described in the introduction by the in the characterizing part of the Claim specified measures achieved
Nachstehend ist das vorliegende Verfahren anhand der Zeichnung beschrieben; es zeigen.The present method is described below with reference to the drawing; show it.
F i g. 1 bis 3 schematische Schnittansichten des Aufzeichmmgsmaterials an verschiedenen Stadien der
Ladungsbilderzeugung und
F i g. 4 Diagramme zur Darstellung des Oberfläehenpotentialverlaufs
bei der Ladungsbilderzeugung.F i g. 1 to 3 are schematic sectional views of the recording material at various stages of charge imaging and
F i g. 4 diagrams for the representation of the surface potential curve during the generation of the charge image.
Beim vorliegenden Verfahren werden die gleichen Materialien und Vorrichtungsteile wie beim Hauptpatent
verwendet.
Das dargestellte Aufzeichnungsmaterial besteht ausIn the present method, the same materials and device parts are used as in the main patent.
The recording material shown consists of
in einem leitenden Schichtträger 1, einer hierauf unmittelbar aufgebrachten photoleitfähigen Schicht 2, gefolgt von einer isolierenden Decksicht 3.in a conductive substrate 1, one on top of it applied photoconductive layer 2, followed by an insulating cover layer 3.
Das Aufzeichnungsmaterial wird als erstes auf der Obsrfläche der Deckschicht 3 beispielsweise mit einer Koronaentladung aufgeladen, und zwar hn in Fig. 1 dargestellten Fall positiv, weil liier die photoleitfähige Schicht als η-leitend angenommen ist Es "baut sich daher eine Ladung entgegengesetzten Vorzeichens zwischen der als Kondensator wirkenden Deckschicht 3 und der Schicht 2 in Nachbarschaft zur letzteren auf. Diese Ladung wird durch Ladungsträger erzeugt, die vom leitenden Schichtträger 1 injiziert worden sind. Da es sich dabei um MajoriJäisladiingsträger handelt, kann diese I adimg ohne Schwierigkeit injiziert werden.The recording material is first applied to the surface of the cover layer 3, for example with a Corona discharge charged, namely in the case shown in Fig. 1 positive, because liier the photoconductive Layer is assumed to be η-conductive. It "therefore builds up a charge of opposite sign the cover layer 3 acting as a capacitor and the layer 2 in the vicinity of the latter. These Charge is generated by charge carriers from conductive substrate 1 have been injected. Since it is a MajororiJäisladiingträger, can these I adimg to be injected without difficulty.
Anschießend, sehe F i g. 2A und 2B, erfolgt badmäßige Belichtung zusammen nut einer Sekundsraufladnng des entgegengesetzten Vorzeichens. Die Sekundäraufladung wird dabei im Verhältnis zur ersten Aufladung so vorgenommen, daß in den bildmäßig heuen Bereichen die Primäraufladung neutralisiert und durch eine Ladung entgegengesetzter Polarität ersetzt wird und daß in den bildmäßig dunklen Bereichen die erste Ladung nicht vollständig neutralisiert wird. F i g. 2A und 2B zeigen die Ladungsverteilung für zwei verschieden starke Sekundäraufladungen, wobei die Sekundäraufladung im Falle der F i g. 2A schwächer als im Falle der Fig.2B durchgeführt worden ist, demzufolge d:e Neutralisation der Primäraufladung in den dunklen Bereichen im Falle der Fig.2A weniger weit als imThen see Fig. 2A and 2B, takes place bathroom-like Exposure together with a second charge of the opposite sign. The secondary charge will be like this in relation to the first charge made that in the pictorially hay areas the primary charge is neutralized and replaced by a charge of opposite polarity and that in the imagewise dark areas the first charge is not completely neutralized. F i g. 2A and 2B show the charge distribution for two differently strong secondary charges, with the secondary charge in the case of FIG. 2A has been carried out weaker than in the case of FIG. 2B, accordingly d: e Neutralization of the primary charge in the dark areas in the case of FIG. 2A is less extensive than in the case of FIG
Anschließend findet Totalbelichtung statt und man erhält die in den Fig.3A und 3B dargestellte Ladungsverteilung. Man sieht, daß die dunklen und hellen Bildbereiche unter entgegengesetztem Vorzeichen aufgeladen sind, so daß nicht nur ein besonders hoher Kontrast vorhanden ist, sondern auch bei der nachfolgenden Entwicklung zum sichtbaren Bild die üblicherweise aufgeladenen Tonerteilchen teils aktiv angezogen, teils aktiv abgestoßen werden, wodurch eine besonders geringe Schleierbildung resultiertTotal exposure then takes place and that shown in FIGS. 3A and 3B is obtained Charge distribution. It can be seen that the dark and light areas of the image have opposite signs are charged, so that not only is there a particularly high contrast, but also with the subsequent development to the visible image, the usually charged toner particles are partly active attracted, sometimes actively repelled, which results in a particularly low level of fogging
Die Diagramme nach Fig.4A und 4B zeigen den jewei'igen Zustand des Oberflächenpotentials der Deckschicht 3 in den einzelnen Verfahrensschritten entsprechend den F i g. 1 bis 3.The diagrams according to Figure 4A and 4B show the respective state of the surface potential of the cover layer 3 in the individual process steps according to the F i g. 1 to 3.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4163965 | 1965-07-12 | ||
JP40073379 | 1965-12-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1797608B1 DE1797608B1 (en) | 1979-09-13 |
DE1797608C2 true DE1797608C2 (en) | 1980-04-24 |
Family
ID=26381289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19661797608 Expired DE1797608C2 (en) | 1965-07-12 | 1966-07-11 | Electrophotographic process for generating a charge image on an insulating layer |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1797608C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5997161A (en) * | 1982-11-27 | 1984-06-04 | Olympus Optical Co Ltd | Electrophotographic method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1497164C3 (en) | 1964-07-25 | 1974-05-09 | Katsuragawa Denki K.K., Tokio | Process for producing a charge image on an insulating surface |
-
1966
- 1966-07-11 DE DE19661797608 patent/DE1797608C2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1497164C3 (en) | 1964-07-25 | 1974-05-09 | Katsuragawa Denki K.K., Tokio | Process for producing a charge image on an insulating surface |
Also Published As
Publication number | Publication date |
---|---|
DE1797608B1 (en) | 1979-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OI | Miscellaneous see part 1 | ||
OI | Miscellaneous see part 1 |