JPH0428306B2 - - Google Patents
Info
- Publication number
- JPH0428306B2 JPH0428306B2 JP58159871A JP15987183A JPH0428306B2 JP H0428306 B2 JPH0428306 B2 JP H0428306B2 JP 58159871 A JP58159871 A JP 58159871A JP 15987183 A JP15987183 A JP 15987183A JP H0428306 B2 JPH0428306 B2 JP H0428306B2
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- potential
- image forming
- color
- toner
- 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
Links
- 238000000034 method Methods 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 108091008695 photoreceptors Proteins 0.000 description 41
- 238000010586 diagram Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- 239000003086 colorant Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fax Reproducing Arrangements (AREA)
Description
【発明の詳細な説明】
(a) 発明の技術分野
本発明は電子写真記録方式、或いは静電記録方
式等による多色電子記録装置における多色電子記
録方法に係り、特に多色の情報を混色がなく鮮明
に記録し得る方法に関するものである。Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a multicolor electronic recording method in a multicolor electronic recording device using an electrophotographic recording method, an electrostatic recording method, etc. The present invention relates to a method that enables clear recording without any blemishes.
(b) 技術の背景
近年情報の多様化に伴つて２色以上の情報を記
録し得る多色電子記録装置が要望され、種々の装
置及び記録方法が提案されている。(b) Background of the Technology With the diversification of information in recent years, there has been a demand for multicolor electronic recording devices capable of recording information in two or more colors, and various devices and recording methods have been proposed.
(c) 従来技術と問題点
第１図は多色電子記録装置を説明するための模
式図であり、従来技術の説明を簡単にするために
２色電子写真記録装置を用いてその記録方法につ
いて説明する。第２図乃至第７図は第１図に示す
２色電子写真記録装置によつて、潜像形成媒体
（以下感光体と称する）に２色のトナー像を形成
する際の各工程における感光体上の電位状態を示
す図である。(c) Prior art and problems Figure 1 is a schematic diagram for explaining a multicolor electronic recording device.To simplify the explanation of the prior art, we will explain the recording method using a two-color electrophotographic recording device. explain. FIGS. 2 to 7 show the photoreceptor in each step of forming a two-color toner image on a latent image forming medium (hereinafter referred to as photoreceptor) using the two-color electrophotographic recording apparatus shown in FIG. FIG. 3 is a diagram showing the above potential state.
これらの模式図、及び電位状態図によつて示す
ように、従来の２色電子写真記録装置において
は、導電層上にセレン（Se）等の光導電層２が
積層された感光体１上を、帯電コロトロン等の初
期帯電器３により第２図に示すように電位Vsに
均一に帯電させる。次いで該感光体１上に、例え
ばOFT（Optical Fiber Tube）からなる第１露
光手段４により、第１の色情報に対応するネガ露
光を行つて、該露光部分の電位が第３図に示すよ
うに略OVに減衰させた第１の色情報に対応した
潜像２１を形成する。次ぎに該潜像２１を、例え
ば正帯電された赤色トナーを含む２成分現像剤を
用い、２成分磁気ブラシ現像方式の第１現像器５
と第１現像バイアス電圧印加器６によつて第４図
に示すように背景部にかぶりが生じないように適
当な現像バイアス電圧VB1を印加して現像を行い
第１の色のトナー像２２を形成する。この時の第
１の色のトナー像２２上の電位はVt1となる。次
ぎに第２の露光手段８により第２の色情報に対応
するネガ露光を行うに先立つて、グリツド制御付
きコロトロンからなる再帯電器７により第５図に
示すように前記感光体１の体電電位Vsを、後述
する１成分磁性トナー現像方式に第２現像におい
て十分なトナー像濃度を得るに必要な潜像強度が
得られる電位Vs1迄再帯電をする。この時再帯電
器７のグリツド電圧をVs1にすることにより、前
記第１の色のトナー像２２上の電位Vt1も、該感
光体１の再帯電電位Vs1と同一電位になる。しか
る後該感光体１上に第２の露光手段８により、第
２の色情報に対応するネガ露光を行つて該露光部
分の電位が、第６図に示すように略OVに低下し
た第２の色情報に対応する潜像２３を形成し、引
続き該潜像２３に、第７図に示すように第２現像
バイアス電圧印加器１０によつて感光体１の再帯
電電位Vs1と同等の現像バイアス電圧VB2を印加
し、１成分磁性トナー現像剤（黒色）を用いた第
２の現像器９により現像を行つて第２の色のトナ
ー像２４を形成する。このようにして前記感光体
１上に形成された赤、黒、２色のトナー像２２，
２４は、転写器１１により記録用紙１２上に転写
され、図示しない定着部において熱圧着等により
定着される。一方感光体１上に残置されたトナー
は除電器１３により除電され、クリーナ１４によ
つてクリーニング除去される。更に感光体１表面
の全電荷を光除電器１５により除電消去されて新
たな記録サイクルに入るようになつている。 As shown in these schematic diagrams and potential state diagrams, in the conventional two-color electrophotographic recording device, a photoconductive layer 2 such as selenium (Se) is laminated on a photoreceptor 1 on a conductive layer. , the initial charger 3 such as a charging corotron is used to uniformly charge the battery to a potential Vs as shown in FIG. Next, negative exposure corresponding to the first color information is performed on the photoreceptor 1 by a first exposure means 4 made of, for example, an OFT (Optical Fiber Tube), so that the potential of the exposed portion becomes as shown in FIG. A latent image 21 corresponding to the first color information attenuated to approximately OV is formed. Next, the latent image 21 is transferred to a first developing unit 5 of a two-component magnetic brush developing method using, for example, a two-component developer containing positively charged red toner.
Then, as shown in FIG. 4, an appropriate developing bias voltage VB 1 is applied by the first developing bias voltage applying device 6 so as not to cause fogging in the background area, and development is performed to form a toner image 22 of the first color. form. At this time, the potential on the first color toner image 22 is Vt1 . Next, before the second exposure means 8 performs negative exposure corresponding to the second color information, the body electric charge of the photoreceptor 1 is charged by the recharging device 7, which is a corotron with grid control, as shown in FIG. The potential Vs is recharged to a potential Vs 1 at which a latent image strength necessary to obtain a sufficient toner image density in the second development using a one-component magnetic toner development method to be described later. At this time, by setting the grid voltage of the recharging device 7 to Vs 1 , the potential Vt 1 on the first color toner image 22 also becomes the same potential as the recharging potential Vs 1 of the photoreceptor 1. Thereafter, the second exposure means 8 performs negative exposure corresponding to the second color information on the photoreceptor 1, and the potential of the exposed portion is reduced to approximately OV as shown in FIG. A latent image 23 corresponding to color information is formed, and subsequently, as shown in FIG . A developing bias voltage VB 2 is applied, and development is performed by a second developing device 9 using a one-component magnetic toner developer (black) to form a toner image 24 of a second color. The red and black toner images 22 formed on the photoreceptor 1 in this way,
24 is transferred onto the recording paper 12 by the transfer device 11, and fixed by thermocompression bonding or the like in a fixing section (not shown). On the other hand, the toner remaining on the photoreceptor 1 is neutralized by a static eliminator 13 and cleaned and removed by a cleaner 14. Furthermore, all charges on the surface of the photoreceptor 1 are removed by an optical charge eliminator 15, and a new recording cycle begins.
尚、上記記録方法において、再帯電により感光
体１の帯電電位Vsと第１の色のトナー像（赤色
のトナー像）２２上の電位Vt1とを帯電電位Vs1
に揃えている所以は、第２の色トナー像（黒色の
トナー像）２４を形成する現像時に既に形成され
ている第１の色のトナー像２２上に第２現像の現
像剤が付着して混色が発生することを防止するた
めである。因みに上記記録方法において再帯電過
程を省いた場合、第８図に示すように第１の色情
報に対応する潜像２１部位に所定の現像バイアス
電圧VB1を印加して形成された第１の色のトナー
像２２上の電位Vt1と感光体１の帯電電位Vsとの
間に電位差がある。このように電位差がある状態
で第９図に示すように該感光体１上に第２の色情
報に対応するネガ露光を行つて該露光部分の電位
を略OVに低下した第２の色情報に対応する潜像
２３を形成し、引続き該潜像２３に、所定の現像
バイアス電圧VB2を印加し、１成分磁性トナー
（黒色）を用いた第２現像により第２の色のトナ
ー像２４を形成すると、前記電位差（VB2−
Vt1）に起因して既に形成されている第１の色の
トナー像２２上に、第２現像の現像剤２４ａが付
着して混色が発生するようになる。 In the above recording method, the charging potential Vs of the photoreceptor 1 and the potential Vt 1 on the first color toner image (red toner image) 22 are changed to the charging potential Vs 1 by recharging .
The reason for this is that during development to form the second color toner image (black toner image) 24, the developer of the second color adheres to the first color toner image 22 that has already been formed. This is to prevent color mixture from occurring. Incidentally, when the recharging process is omitted in the above recording method, the first image formed by applying a predetermined developing bias voltage VB 1 to the latent image 21 portion corresponding to the first color information, as shown in FIG. There is a potential difference between the potential Vt 1 on the color toner image 22 and the charging potential Vs of the photoreceptor 1. In this state where there is a potential difference, negative exposure corresponding to the second color information is performed on the photoreceptor 1 as shown in FIG. 9, and the potential of the exposed portion is reduced to approximately OV to obtain the second color information. Then, a predetermined developing bias voltage VB 2 is applied to the latent image 23, and a second color toner image 24 is formed by second development using a one-component magnetic toner (black). is formed, the potential difference (VB 2 −
Vt 1 ), the developer 24a of the second developer adheres to the already formed toner image 22 of the first color, resulting in color mixing.
従つて上記従来の２色記録方法においては、前
記した再帯電過程によつて混色を防止し、良好な
２色記録を可能にしている。 Therefore, in the conventional two-color recording method described above, color mixing is prevented by the recharging process described above, and good two-color recording is made possible.
しかしながら、なお上記した従来の２色電子写
真記録方法においては、良好な色濃度のトナー情
報像を得るために必要な潜像強度が大きい場合
や、第１の現像と第２の現像に、それぞれ必要な
潜像強度の差が大きい場合には、再帯電を施して
も第１の色のトナー像２２上の電位Vt1と感光体
１の帯電電位Vsが揃わないことがあり、これに
起因して第２の現像時に既に形成されている第１
の色のトナー像２２に混色が発生し、良好な２色
のトナー像が得られないといつた欠点があつた。
尚、このような欠点の現象は、本発明者等の検討
によれば、感光体の静電容量Cpが大きい場合に
顕著になる。結局これらの問題は所定の帯電電位
を得るために必要とする電荷量が増大することに
起因している。 However, in the above-mentioned conventional two-color electrophotographic recording method, there are cases where the latent image strength required to obtain a toner information image with good color density is large, and when the first development and the second development are performed separately. If the difference in required latent image strength is large, the potential Vt 1 on the first color toner image 22 and the charged potential Vs of the photoreceptor 1 may not be equal even after recharging. The first image that has already been formed during the second development process is
There was a drawback that color mixing occurred in the toner image 22 of the colors, and a good two-color toner image could not be obtained.
Incidentally, according to studies by the present inventors, this phenomenon of defects becomes noticeable when the electrostatic capacitance Cp of the photoreceptor is large. Ultimately, these problems are caused by an increase in the amount of charge required to obtain a predetermined charging potential.
ρ：トナー層（像）の体積電荷密度、dt：トナ
ー層（像）の厚さ、εp：真空の誘電率、εrl：トナ
ー層（像）の平均比誘電率、Cp：感光体の静電
容量、ｇ：感光体上の電荷密度とする時、前記第
１の色のトナー像２２上の電位Vt1が次式で与え
られる。即ち、
Vt1＝1/2（ρdt2／εpεrl）＋ρdt／Cp＋ｇ／Cp
上記式において、1/2（ρdt／εpεrl）で示されて
いる第１項はトナー層（像）自身の持つ電位、
ρdt／Cpで示されている第２項はトナー電荷によ
る感光体の電位、更にｇ／Cpで示されている第
３項は表面電荷による感光体の電位である。 ρ: Volume charge density of toner layer (image), dt: Thickness of toner layer (image), ε p : Permittivity of vacuum, εr l : Average relative permittivity of toner layer (image), Cp: Photoreceptor When capacitance, g: charge density on the photoreceptor, the potential Vt 1 on the first color toner image 22 is given by the following equation. That is, Vt 1 = 1/2(ρdt 2 /ε p εr l )+ρdt/Cp+g/Cp In the above equation, the first term expressed as 1/2(ρdt/ε p εr l ) is the toner layer (image ) own potential,
The second term represented by ρdt/Cp is the potential of the photoreceptor due to toner charge, and the third term represented by g/Cp is the potential of the photoreceptor due to surface charge.
そして所定電位量の帯電に対し、静電容量Cp
の大きい感光体を用いると上記関係式における第
２項及び第３項の各電位が小さくなり、一方第１
項、即ちトナー層（像）に加わる電圧が大きくな
る。該電圧が大きくなり過ぎるとトナー層（像）
表面部と感光体表面の間で気中放電が生じる様に
なり、これに起因してトナー層（像）の電位を感
光体の電位に上昇せしめて揃えることが困難に成
ることが判明している。第１図に示す２色電子写
真記録装置について言えば、第１現像に２成分磁
気ブラシ現像（必要潜像強度300〜400V以上）、
第２現像に１成分磁性トナー現像（必要潜像強度
700〜800V以上）を用いたが、この場合において
は感光体容量Cpが大凡1μF／m2を越えると再帯電
後の電位不均一と云う問題が生じる。尚再帯電後
の電位不均一の起こる感光体の容量Cpの値は絶
対的なものではなく、使用するトナーの誘電率ε
によつても変化する。 Then, for a given amount of potential charging, the capacitance Cp
If a photoreceptor with a large
ie, the voltage applied to the toner layer (image) increases. If the voltage becomes too large, the toner layer (image)
It was discovered that aerial discharge began to occur between the surface area and the photoconductor surface, and that this made it difficult to raise and equalize the potential of the toner layer (image) to the potential of the photoconductor. There is. Regarding the two-color electrophotographic recording device shown in FIG. 1, the first development involves two-component magnetic brush development (necessary latent image strength of 300 to 400 V or more);
One-component magnetic toner development (required latent image strength) for second development
700 to 800 V or more), but in this case, if the photoreceptor capacitance Cp exceeds approximately 1 μF/m 2 , a problem of potential non-uniformity after recharging occurs. Note that the value of the capacitance Cp of the photoconductor where potential non-uniformity occurs after recharging is not an absolute value, but depends on the dielectric constant ε of the toner used.
It also changes depending on.
(d) 発明の目的
本発明の上記従来の欠点に鑑み、多色のトナー
像を形成する感光体の静電容量等の差異にとらわ
れることなく、既に形成されている第１の色のト
ナー像上に電位Vt1と感光体の帯電電位Vsとを、
次の現像で十分なトナー像濃度が得られる電位に
容易に揃えることができ、もつて混色の無い良好
な多色記録が得られる新規な多色電子記録方法を
提供することを目的とするものである。(d) Purpose of the Invention In view of the above-mentioned conventional drawbacks of the present invention, it is possible to use a toner image of the first color that has already been formed, regardless of the difference in capacitance, etc. of the photoreceptor that forms the multicolor toner image. The potential Vt 1 and the charging potential Vs of the photoreceptor are
It is an object of the present invention to provide a new multicolor electronic recording method that can easily adjust the potential to obtain a sufficient toner image density in the next development and that can obtain good multicolor recording without color mixture. It is.
(e) 発明の構成
そしてこの目的は本発明によれば、初期帯電を
施した潜像形成媒体上に、光照射、或いは放電等
による潜像形成手段により色情報に対応した部分
の電荷を消去して潜像を形成し、該潜像を現像手
段により像化した後、該トナー像を形成した潜像
形成媒体面に再帯電を施す過程と、該再帯電を施
した潜像形成媒体上に次ぎの光照射、或いは放電
等による潜像形成手段により次ぎの色情報に対応
した部分の電荷を消去して潜像を形成する過程
と、該潜像を現像手段によりトナー像化する過程
とを順次繰り返して多色の情報を記録する電子記
録方法において、上記初期帯電電位を、順次繰り
返して行う現像工程の内で潜像強度が最大となる
現像工程に必要な、潜像強度が得られる電位と同
電位、もしくは該電位以上とすると共に、該初期
帯電を施した潜像形成媒体上に潜像を形成する各
潜像形成手段の内、少なくとも１つ以上の潜像形
成手段において該潜像形成媒体の保持している帯
電電荷の総てを除去せずに一部のみを除去して潜
像を形成するようにしたことを特徴とする多色電
子記録方法を提供することによつて達成される。(e) Structure of the Invention According to the present invention, this object is to erase the charge in a portion corresponding to color information on a latent image forming medium that has been initially charged, using a latent image forming means such as light irradiation or electric discharge. to form a latent image, and after converting the latent image into an image by a developing means, recharging the surface of the latent image forming medium on which the toner image has been formed; a process of forming a latent image by erasing the charge in a portion corresponding to the next color information using a latent image forming means using next light irradiation or electric discharge; and a process of converting the latent image into a toner image by a developing means. In an electronic recording method in which multicolor information is recorded by sequentially repeating the above-mentioned initial charging potential, the latent image strength required for the development step in which the latent image strength is maximized among the development steps performed by sequentially repeating the above-mentioned initial charging potential can be obtained. At least one of the latent image forming means forms a latent image on the initially charged latent image forming medium. By providing a multicolor electronic recording method characterized in that a latent image is formed by removing only a part of the electrical charge held by an image forming medium without removing all of it. achieved.
(f) 発明の実施例
以下図面を用いて本発明の実施例について詳細
に説明する。(f) Embodiments of the invention Examples of the invention will be described in detail below with reference to the drawings.
第１０図乃至第１５図は本発明に係る多色電子
記録方法の一実施例を、前記第１図に示す２色電
子写真記録装置に適用してその各記録工程におけ
る感光体上の電位状態を示す図である。 FIGS. 10 to 15 show potential states on the photoreceptor during each recording process when an embodiment of the multicolor electronic recording method according to the present invention is applied to the two-color electrophotographic recording apparatus shown in FIG. 1. FIG.
本発明の実施例を前記第１図に示す２色電子写
真記録装置の構成図を用いて説明すると、まず感
光体１を、帯電コロトロン等の初期帯電器３によ
り第１０図に示すように例えば最終の現像となる
１成分磁性トナー現像に必要な潜像強度が得られ
る電位Vsに均一に帯電させる。本実施例の記録
装置における再帯電特性を第１６図に示す。これ
は再帯電前の第１の色のトナー像上の電位と背景
部における感光体１上の電位との電位差が300V
の場合である。背景部における感光体上の電位変
化が100Vを越すような再帯電を行うと、第１の
色のトナー像上の電位が背景部における感光体１
上の電位と揃わなくなることが分かる。このた
め、１成分磁性トナー現像に必要な潜像強度が得
られる電位迄、感光体１上の電位を再帯電によつ
て増加させる時の電位増加分が100V以下になる
ように予め初期帯電電位を１成分磁性トナー現像
に必要な潜像強度が得られる電位Vsに設定する。 An embodiment of the present invention will be explained using the configuration diagram of a two-color electrophotographic recording apparatus shown in FIG. It is uniformly charged to a potential Vs that provides the latent image strength necessary for one-component magnetic toner development, which is the final development. FIG. 16 shows the recharging characteristics of the recording apparatus of this example. This means that the potential difference between the potential on the first color toner image before recharging and the potential on the photoconductor 1 in the background area is 300V.
This is the case. When recharging is performed such that the potential change on the photoconductor in the background area exceeds 100V, the potential on the first color toner image changes to the photoconductor 1 in the background area.
It can be seen that the potential is no longer aligned with the potential above. For this reason, the initial charging potential is set in advance so that when the potential on the photoreceptor 1 is increased by recharging, the increase in potential will be 100 V or less until the potential at which the latent image strength required for one-component magnetic toner development is obtained. is set to a potential Vs that provides the latent image strength necessary for one-component magnetic toner development.
次に該感光体１上に、例えばOFT（Optical
Fiber Tube）からなる第１露光手段４により、
露光量を制御して第１の色情報に対応するネガ露
光を行つて該露光部分の電位が第１１図に示すよ
うに、後述する第１現像に必要な潜像強度が得ら
れる電位Vkとなるように感光体１上の帯電電荷
の一部を除去し、第１の色情報に対応する潜像２
１を形成する。次いで該潜像２１を、例えば正帯
電された赤色トナーを含む２成分現像剤を用いた
磁気ブラシ現像方式の第１の現像器５と第１現像
バイアス電圧印加器６により、第１２図に示すよ
うに背景部にかぶりが発生しないように適当な現
像バイアス電位VB1を印加し、現像を行つて第１
の色のトナー像２２を形成する。次にグリツド制
御付きコロトロンからなる再帯電器７により再帯
電を行う。再帯電を行う前の感光体１上の電位
は、１成分磁性トナー現像に必要な潜像強度が得
られる電位Vsであるから、再帯電によつてこの
部分の電位を増加させる必要はない。従つて第１
６図に示す結果から、第１３図のように前記第１
の色のトナー像２２上の電位Vt1を電器Vsに揃え
ることができる。 Next, for example, OFT (Optical
The first exposure means 4 consisting of Fiber Tube)
By controlling the exposure amount and performing negative exposure corresponding to the first color information, the potential of the exposed portion is determined to be a potential Vk at which the latent image strength necessary for the first development described below is obtained, as shown in FIG. A part of the charge on the photoreceptor 1 is removed so that a latent image 2 corresponding to the first color information is formed.
form 1. Next, the latent image 21 is developed, for example, by a first developer 5 of a magnetic brush development method using a two-component developer containing positively charged red toner and a first development bias voltage applicator 6, as shown in FIG. Apply an appropriate developing bias potential VB 1 so as not to cause fogging in the background area, and perform development.
A toner image 22 of color is formed. Next, recharging is performed by a recharging device 7 consisting of a corotron with grid control. Since the potential on the photoreceptor 1 before recharging is the potential Vs at which the latent image strength necessary for one-component magnetic toner development is obtained, there is no need to increase the potential of this portion by recharging. Therefore, the first
From the results shown in Figure 6, the first
The potential Vt 1 on the toner image 22 of the color can be made equal to the electrical voltage Vs.
しかる後該感光体１上に第２の露光手段８によ
り、第２の色情報に対応するネガ露光を行つて該
露光部分の電位が、第１４図に示すように略OV
に低下した第２の色情報に対応する潜像２３を形
成し、引続き該潜像２３に、第１５図に示すよう
に第２現像バイアス電圧印加器１０によつて感光
体１の帯電電位Vsと同等の現像バイアス電圧
VB2を印加し、１成分磁性トナー（黒色）を用い
た第２の現像器９により現像を行つて第２の色の
トナー像２４を形成するようにすれば、感光体１
上に混色の無い２色（赤、黒）のトナー像２２，
２４が得られる。従つて以下従来と同様に、感光
体１上に形成された第１及び第２の色トナー像２
２，２４を転写部８において記録用紙１０上に転
写し、定着部９において熱圧着等により定着する
ことにより、混色の無い２色の情報を鮮明に記録
することが可能となる。 Thereafter, the second exposure means 8 performs negative exposure on the photoreceptor 1 corresponding to the second color information, and the potential of the exposed portion becomes approximately OV as shown in FIG.
A latent image 23 is formed corresponding to the second color information that has been lowered to 100. Subsequently, as shown in FIG. development bias voltage equivalent to
By applying VB 2 and performing development using the second developer 9 using one-component magnetic toner (black) to form the toner image 24 of the second color, the photoreceptor 1
Two-color (red, black) toner image 22 with no color mixture on top,
24 is obtained. Therefore, as in the conventional case, the first and second color toner images 2 formed on the photoreceptor 1
2 and 24 onto the recording paper 10 in the transfer section 8 and fixed by thermocompression bonding or the like in the fixing section 9, it becomes possible to clearly record two-color information without color mixture.
以上、第１図及び第１０図から第１６図に従つ
て説明してきたが、実際には感光体１上の電位の
暗減衰や、現像の時のリーク電圧等を考慮して各
電位条件を設定する必要がある。本実施例におけ
る電位条件を具体的に示すと次のようになる。感
光体１の静電容量Cpは1.3μF／m2である。初期帯
電電位Vsは暗減衰や、現像の時のリーク電圧等
を考慮して１成分現像に必要な潜像強度が得られ
る電位800Vよりも高い値1000V程度に設定する。
第１露光後の電位Vkは約400Vとし、第１現像バ
イアス電圧VB1を800Vに設定して現像を行う。
この時、感光体１上の電位は、現像の時のリーク
電圧によつて略800V程度に減衰する。このよう
に電位条件を設定したところ、再帯電によつて第
１の色のトナー像上の電位を800Vにすることが
でき、混色等のない良好な２色画像が得られた。
尚、以上の実施例では説明を簡単化するために２
色の電子写真記録方法の場合の例について説明し
たが、本発明はこの例に限定されるものではな
く、３色以上の多色電子記録装置の記録方法にも
適用可能なことは云うまでもなく、同様の効果が
得られる。又本発明は以上の実施例で説明した電
子写真記録方式の多色記録に限定されるものでは
なく、例えばピン電極等の潜像形成手段を用い
た、静電記録方式の多色記録にも適用可能である
ことは云うまでもない。 The above explanation has been made according to FIGS. 1 and 10 to 16, but in reality, each potential condition is adjusted in consideration of dark decay of the potential on the photoreceptor 1, leakage voltage during development, etc. Must be set. The specific potential conditions in this example are as follows. The electrostatic capacitance Cp of the photoreceptor 1 is 1.3 μF/m 2 . The initial charging potential Vs is set to a value of about 1000 V, which is higher than the potential 800 V at which the latent image strength necessary for one-component development is obtained, taking into consideration dark decay, leakage voltage during development, and the like.
The potential Vk after the first exposure is about 400V, and the first development bias voltage VB1 is set to 800V to perform development.
At this time, the potential on the photoreceptor 1 is attenuated to approximately 800V due to leakage voltage during development. When the potential conditions were set in this manner, the potential on the first color toner image could be raised to 800 V by recharging, and a good two-color image without color mixture etc. was obtained.
In the above embodiment, in order to simplify the explanation, two
Although an example of a color electrophotographic recording method has been described, the present invention is not limited to this example, and it goes without saying that it is applicable to a recording method of a multicolor electronic recording device that uses three or more colors. The same effect can be obtained. Furthermore, the present invention is not limited to multicolor recording using the electrophotographic recording method as explained in the above embodiments, but can also be applied to multicolor recording using an electrostatic recording method using a latent image forming means such as a pin electrode. Needless to say, it is applicable.
(g) 発明の効果
以上の説明から明らかなように、本発明に係る
多色電子記録方法によれば、該感光体に対する初
期帯電電位を各現像手段の内、必要潜像強度が最
大となる現像手段に必要な潜像強度が得られる電
位、又はそれ以上の電位に設定し、再帯電工程に
おける再帯電量を小さくすることにより感光体の
静電容量の差異にかかわらず、再帯電時に既に形
成されているトナー像の電位を感光体の帯電電位
と同一電位レベルに容易に揃えることができる。
その結果混色の無い良好な多色記録が得られる利
点を有し、実用上極めて有利である。従つてこの
種の電子写真記録方式、或いは静電記録方式の多
色電子記録装置に適用して優れた効果を奏する。(g) Effects of the Invention As is clear from the above explanation, according to the multicolor electronic recording method of the present invention, the initial charging potential for the photoreceptor can be set such that the required latent image strength is the highest among the developing means. By setting the developing means to a potential that provides the necessary latent image strength or a potential higher than that, and reducing the amount of recharging in the recharging process, regardless of the difference in the capacitance of the photoreceptor, it is possible to The potential of the toner image being formed can be easily made to the same potential level as the charged potential of the photoreceptor.
As a result, it has the advantage that good multicolor recording without color mixture can be obtained, which is extremely advantageous in practice. Therefore, excellent effects can be achieved when applied to this type of electrophotographic recording system or electrostatic recording system multicolor electronic recording apparatus.
第１図は多色電子記録装置を、電子写真記録方
式の２色電子記録装置を用いて説明するための模
式図、第２図乃至第９図は第１図に示す装置によ
つて従来、潜像形成媒体（以下感光体と称する）
に２色のトナー像を形成する際の電位状態を説明
する図、第１０図乃至第１５図は本発明に係る多
色電子記録方法の一実施例を前記第１図に示す２
色電子写真記録装置に適用してその各記録工程に
おける感光体上の電位状態図、第１６図は再帯電
における感光体上の電位変化と、再帯電後の感光
体上の電位とトナー像上の電位との電位差との関
係を示す図である。
図面において、２１は第１の色情報に対応する
潜像、２２は第１の色のトナー像、２３は第２の
色情報に対応する潜像、２４は第２の色のトナー
像、Vsは感光体の初期帯電電位、VB1，VB2は
現像バイアス電圧、Vkは第１現像で必要な潜像
強度が得られるための第１露光後の露光部電位、
Vt1は第１の色のトナー像２２上の電位を示す。
FIG. 1 is a schematic diagram for explaining a multicolor electronic recording device using a two-color electronic recording device of an electrophotographic recording method, and FIGS. Latent image forming medium (hereinafter referred to as photoreceptor)
FIGS. 10 to 15 are diagrams illustrating potential states when forming a two-color toner image, and FIGS.
Fig. 16 is a diagram of the state of potential on the photoreceptor in each recording process when applied to a color electrophotographic recording device, and shows the potential changes on the photoreceptor during recharging, the potential on the photoreceptor after recharging, and the toner image. FIG. 3 is a diagram showing the relationship between the potential of In the drawing, 21 is a latent image corresponding to the first color information, 22 is a toner image of the first color, 23 is a latent image corresponding to the second color information, 24 is a toner image of the second color, Vs is the initial charging potential of the photoreceptor, VB 1 and VB 2 are the developing bias voltages, Vk is the exposed area potential after the first exposure to obtain the necessary latent image strength in the first development,
Vt 1 indicates the potential on the first color toner image 22.
Claims (1)
成手段により色情報に対応した部分の電荷を消去
して潜像を形成し、該潜像を現像手段によりトナ
ー像化した後、該トナー像を形成した潜像形成媒
体面に再帯電を施す過程と、該再帯電を施した潜
像形成媒体上に次ぎの潜像形成手段により次ぎの
色情報に対応した部分の電荷を消去して潜像を形
成する過程と、該潜像を現像手段によりトナー像
化する過程とを順次繰り返して多色の情報を記録
する電子記録方法において、上記初期帯電電位
を、順次繰り返して行う現像工程の内で潜像強度
が最大となる現像工程に必要な潜像強度が得られ
る電位と同電位、もしくは該電位以上とすると共
に、該初期帯電を施した潜像形成媒体上に潜像を
形成する各潜像形成手段の内、少なくとも一つの
潜像形成手段において、該潜像形成媒体の保持し
ている帯電電荷のすべてを除去せずに、一部のみ
を除去して潜像を形成するようにしたことを特徴
とする多色電子記録方法。 ２ 上記潜像形成手段が光照射手段であり、光エ
ネルギーを制御することで、潜像形成媒体上の帯
電電荷の一部のみを除去して潜像を形成するよう
にしたことを特徴とする特許請求の範囲第１項に
記載の多色電子記録方法。 ３ 上記潜像形成手段が放電手段であり、放電に
よるイオン、若しくは電子の発生量を制御するこ
とで、潜像形成媒体上の帯電電荷の一部のみを除
去して潜像を形成するようにしたことを特徴とす
る特許請求の範囲第１項に記載の多色電子記録方
法。[Scope of Claims] 1. On a latent image forming medium that has been initially charged, a latent image is formed by erasing the charge in a portion corresponding to color information by a latent image forming means, and the latent image is transferred to a toner by a developing means. After the toner image is formed, the surface of the latent image forming medium on which the toner image has been formed is recharged, and the next latent image forming means corresponds to the next color information on the recharged latent image forming medium. In an electronic recording method in which multicolor information is recorded by sequentially repeating the process of erasing the charge of a portion to form a latent image and the process of converting the latent image into a toner image by a developing means, the initial charging potential is A latent image forming medium that is set at a potential equal to or higher than the potential that provides the latent image strength necessary for the development step in which the latent image strength is maximized in the sequentially repeated development steps, and that is subjected to the initial charging. Among the respective latent image forming means that form a latent image on the latent image forming medium, at least one of the latent image forming means removes only a part of the electrical charge held by the latent image forming medium without removing all of it. A multicolor electronic recording method characterized in that a latent image is formed using a multicolor electronic recording method. 2. The latent image forming means is a light irradiation means, and the latent image is formed by removing only a part of the electrical charges on the latent image forming medium by controlling the light energy. A multicolor electronic recording method according to claim 1. 3. The latent image forming means is a discharging means, and by controlling the amount of ions or electrons generated by discharge, only a part of the electrical charge on the latent image forming medium is removed to form a latent image. A multicolor electronic recording method according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159871A JPS6050553A (en) | 1983-08-30 | 1983-08-30 | Multicolor electronic recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159871A JPS6050553A (en) | 1983-08-30 | 1983-08-30 | Multicolor electronic recording method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6050553A JPS6050553A (en) | 1985-03-20 |
| JPH0428306B2 true JPH0428306B2 (en) | 1992-05-14 |
Family
ID=15703024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58159871A Granted JPS6050553A (en) | 1983-08-30 | 1983-08-30 | Multicolor electronic recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050553A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0731438B2 (en) * | 1985-08-14 | 1995-04-10 | 富士通株式会社 | Multicolor recorder |
| JPS6239882A (en) * | 1985-08-16 | 1987-02-20 | Fujitsu Ltd | Multi-color recording method |
| DE3773307D1 (en) * | 1986-09-03 | 1991-10-31 | Matsushita Electric Ind Co Ltd | ELECTROPHOTOGRAPHIC COLOR PROCESS. |
| GB2262187A (en) * | 1988-11-22 | 1993-06-09 | Seiko Epson Corp | Semiconductor resistors |
| US5579100A (en) * | 1994-12-23 | 1996-11-26 | Xerox Corporation | Single positive recharge method and apparatus for color image formation |
| JP3007845B2 (en) * | 1996-07-12 | 2000-02-07 | 株式会社日立製作所 | Color electrophotographic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687058A (en) * | 1979-12-18 | 1981-07-15 | Fujitsu Ltd | Two-color electrophotographic recorder |
| JPS5723952A (en) * | 1980-07-18 | 1982-02-08 | Hitachi Ltd | Bicolor electrophotographic method |
| JPS5880653A (en) * | 1981-11-06 | 1983-05-14 | Canon Inc | Image forming method |
| JPS5912460A (en) * | 1982-07-14 | 1984-01-23 | Hitachi Ltd | Picture recording device |
-
1983
- 1983-08-30 JP JP58159871A patent/JPS6050553A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687058A (en) * | 1979-12-18 | 1981-07-15 | Fujitsu Ltd | Two-color electrophotographic recorder |
| JPS5723952A (en) * | 1980-07-18 | 1982-02-08 | Hitachi Ltd | Bicolor electrophotographic method |
| JPS5880653A (en) * | 1981-11-06 | 1983-05-14 | Canon Inc | Image forming method |
| JPS5912460A (en) * | 1982-07-14 | 1984-01-23 | Hitachi Ltd | Picture recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6050553A (en) | 1985-03-20 |
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