JPH0473792B2 - - Google Patents
Info
- Publication number
- JPH0473792B2 JPH0473792B2 JP58152867A JP15286783A JPH0473792B2 JP H0473792 B2 JPH0473792 B2 JP H0473792B2 JP 58152867 A JP58152867 A JP 58152867A JP 15286783 A JP15286783 A JP 15286783A JP H0473792 B2 JPH0473792 B2 JP H0473792B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- reflected light
- color
- density
- developer
- 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
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0849—Detection or control means for the developer concentration
- G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
技術分野
本発明は、色の異なる複写画像を得ようとする
電子写真複写装置等におけるトナー濃度制御装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a toner density control device in an electrophotographic copying apparatus or the like which attempts to obtain copied images of different colors.
従来技術
色の異なる複写画像を得ようとする場合、色の
異なるトナーなので、トナー濃度制御を変える必
要があるが、簡単で有効な制御を行うことができ
なかつた。Prior Art When trying to obtain copied images of different colors, it is necessary to change toner density control since the toners are of different colors, but simple and effective control has not been possible.
目 的
色の異なる現像剤を入れた複数の現像ユニツト
を交換、或いは複数の内から選択して色の異なる
画像を得ることができる複写機等においては、色
の異なるトナーが用いられるので、トナー濃度制
御を変える必要があるが、本発明は、これを簡単
な制御の切り換えで行い、多色にトナー濃度を適
切に保つようにしようとするものである。Purpose Copying machines, etc. that can obtain images with different colors by replacing or selecting from multiple developing units containing developers of different colors use toner of different colors. Although it is necessary to change the density control, the present invention attempts to do this by simply switching the control to maintain appropriate toner density for multiple colors.
構 成
第１図は、電子写真複写装置の感光体ドラム周
りの構成を示す断面図で、この例では一個の現像
ユニツトが用いられており、このユニツトを異な
る色の現像剤の入つたユニツトと交換することで
画像の色を変えようとするものであり、また、第
２図は、第１図と同様の図であるが、色の異なる
現像剤の入つた複数の現像ユニツトから選択して
現像することで、画像の色を変えうるようにする
ものである。Configuration Figure 1 is a sectional view showing the configuration around the photosensitive drum of an electrophotographic copying device. In this example, one developing unit is used, and this unit is combined with a unit containing developers of different colors. The purpose is to change the color of the image by exchanging the developer, and Figure 2 is similar to Figure 1, but it is possible to select from a plurality of developing units containing different colored developers. The color of the image can be changed by developing it.
第１図において、感光体ドラム１の周りには、
帯電器２、露光装置３、交換可能な現像ユニツト
４、発光ダイオード５と反射光受光素子６よりな
る濃度検知センサー７、転写紙ガイド８、転写分
離帯電器９、分離爪１０、クリーニングユニツト
１１等が設けられている。なお、１２はイレース
ランプである。 In FIG. 1, around the photosensitive drum 1,
A charger 2, an exposure device 3, a replaceable developing unit 4, a density detection sensor 7 consisting of a light emitting diode 5 and a reflected light receiving element 6, a transfer paper guide 8, a transfer separation charger 9, a separation claw 10, a cleaning unit 11, etc. is provided. Note that 12 is an erase lamp.
第３図は、露光装置３の一部を示す図で、原稿
１３を載置するコンタクトガラス１４の原稿セツ
ト部近傍裏面に、濃部、淡部を備えた基本原稿パ
ターン１５を設け、このパターン１５が露光ラン
プ１６で照明され、その反射光がミラー１７等に
より反射案内されて感光体ドラム１上に露光され
る。 FIG. 3 is a diagram showing a part of the exposure device 3, in which a basic original pattern 15 having a dark part and a light part is provided on the back surface of the contact glass 14 on which the original 13 is placed, near the original setting part. 15 is illuminated by an exposure lamp 16, and the reflected light is reflected and guided by a mirror 17 and the like to expose the photosensitive drum 1.
第４図は濃度検知センサー機構の原理を示すも
ので、イは基本原稿パターン１５の平面図、ロは
感光体ドラム１、現像ドラム１８、濃度センサー
７、基本原稿パターン像１９との関係、ハは濃度
検知センサー７よりの出力と基本原稿パターン１
５位置との関係を示す図で、感光体ドラム１上に
露光され、現像ドラム１８により現像された基本
原稿パターン像１９の濃淡を、濃度検知センサー
７により読み取る場合、淡部の反射光電圧変換値
V1は高く、濃部の出力電圧V2は低くなるのであ
るが、その値は、トナー濃度の高低によつて反射
光の強さが異なるため変つてくる。 FIG. 4 shows the principle of the density detection sensor mechanism, in which A is a plan view of the basic original pattern 15, B is the relationship between the photosensitive drum 1, the developing drum 18, the density sensor 7, and the basic original pattern image 19, and H is a plan view of the basic original pattern 15. is the output from density detection sensor 7 and basic original pattern 1
5, when the density detection sensor 7 reads the density of the basic original pattern image 19 exposed on the photoreceptor drum 1 and developed by the developing drum 18, the reflected light voltage conversion of the light part is shown. value
V 1 is high, and the output voltage V 2 of the dark area is low, but the values change because the intensity of reflected light varies depending on the level of toner concentration.
これを利用して、基本原稿パターン像１９の淡
部の反射光電圧変換値V1と濃部の反射光電圧変
換値V2の比V1／V2の値が予じめ設定された値Ｃ
と同じ、即ち、V1／V2＝Ｃならば適正濃度、
V1／V2＞Ｃならば濃度が高いのでトナー補給は
無し、V1／V2＜Ｃならば濃度が低いのでトナー
を補給する。というようになつている。 Using this, the ratio V 1 / V 2 of the reflected light voltage conversion value V 1 of the light portion of the basic original pattern image 19 to the reflected light voltage conversion value V 2 of the dark portion is set to a preset value. C
, that is, if V 1 /V 2 = C, then the appropriate concentration,
If V 1 /V 2 >C, the density is high, so toner is not replenished, and if V 1 /V 2 <C, the density is low, so toner is replenished. It has become like this.
ところが、現像剤の色が変わると、基本原稿パ
ターン像が現像剤の色で現像され、適正濃度であ
つても色によつて反射率が違うので、第５図イ黒
色現像、ニ赤色現像、ハ黄色現像、のように、
V1，V2の値が変つてくる。 However, when the color of the developer changes, the basic original pattern image is developed with the color of the developer, and even if the density is appropriate, the reflectance differs depending on the color. Ha yellow development, like,
The values of V 1 and V 2 will change.
本発明においては、この点を利用して、セツト
された現像剤の色に応じてV1／V2と比較す設定
値Ｃの値を変えてやることにより、各々の色の現
像剤のトナー濃度を適正に保つことができるよう
にするものである。即ち、第１図の実施例におい
ては、現像ユニツト４を交換可能とし、異なる色
の画像を得ようとする場合、その現像ユニツトを
希望する色のトナーの入つている現像ユニツトに
入れ換え、それと同時に設定値Ｃを変えるように
する。また、第２図の実施例においては、複数の
現像ユニツト４，４′，４″が設けられていて、希
望の色の現像ユニツトのみが作動するようにし、
その作動する色の設定値Ｃを変えるようにすれ
ば、常に適正トナー濃度に現像剤を保持できるの
で、異なる色の複写を行う場合でも常に最適の複
写物がられる。 In the present invention, taking advantage of this point, by changing the value of the set value C compared with V 1 /V 2 according to the color of the set developer, the toner of each color developer is changed. This allows the concentration to be maintained at an appropriate level. That is, in the embodiment shown in FIG. 1, the developing unit 4 is made replaceable, and when it is desired to obtain an image of a different color, the developing unit 4 is replaced with a developing unit containing toner of the desired color, and at the same time. Try changing the setting value C. Further, in the embodiment shown in FIG. 2, a plurality of developing units 4, 4', 4'' are provided, and only the developing unit of the desired color is operated.
By changing the set value C of the operating color, the developer can be maintained at an appropriate toner concentration at all times, so that optimal copies can always be made even when copies are made in different colors.
なお、第６図イ，ロは本発明による実施例のフ
ローチヤート、第７図は同じくその回路図であ
る。 6A and 6B are a flowchart of an embodiment according to the present invention, and FIG. 7 is a circuit diagram thereof.
効 果
本発明によれば、基本原稿パターン像の濃淡に
よる反射光の電圧変換値の比を現像剤の色によつ
て定まつた設定値と比較することにより、常に色
トナーの適正濃度を保持できるようにしたので、
常に最適の色による複写機を得ることができる。Effects According to the present invention, by comparing the ratio of the voltage conversion value of reflected light due to the density of the basic original pattern image with a set value determined by the color of the developer, the appropriate density of color toner can be maintained at all times. I made it possible, so
You can always obtain a copier with optimal colors.
なお、設定値Ｃの値の切り換えは現像ユニツト
の交換、または、作動現像ユニツトの切換と同時
に自動的に行われるようにしてもよいし、その度
毎に手動により行うようにしてもよい。 The value of the set value C may be changed automatically at the same time as the developing unit is replaced or the active developing unit is switched, or it may be changed manually each time.
第１図は交換可能な現像ユニツトを設けた感光
体ドラム周辺の配置を示す断面図、第２図は複数
の現像ユニツトを備えた場合を示す第１図と同様
の図、第３図は基本原稿パターンの設置状態を示
す断面図、第４図は基本原稿パターンによるトナ
ー濃度制御機構の説明図で、イは基本原稿パター
ンの平面図、ロは現像された基本原稿パターン像
の濃度検知センサーによる読取状態を示す図、ハ
は基本原稿パターン像の濃淡位置とその反射光の
電圧変換値の関係を示す図、第５図イ，ロ，ハ
は、それぞれ黒色現像、赤色現像、黄色現像のを
示す基本原稿パターン像の濃淡位置とその反射光
の電圧変換値の関係を示す図、第６図イ，ロは本
発明実施例のフローチヤート、第７図は同じくそ
の回路図、である。
１……感光体ドラム、３……露光装置、４，
４′，４″……現像ユニツト、７……濃度検知セン
サー、１３……原稿、１４……コンタクトガラ
ス、１５……基本原稿パターン、１６……回光ラ
ンプ、１８……現像ドラム、１９……基本原稿パ
ターン像、V1，V2……反射光の電圧変換値、Ｃ
……現像剤の色による設定値。
Figure 1 is a sectional view showing the arrangement around the photoreceptor drum equipped with replaceable developing units, Figure 2 is a similar view to Figure 1 showing the case where multiple developing units are provided, and Figure 3 is a basic view. 4 is an explanatory diagram of the toner density control mechanism based on the basic original pattern, A is a plan view of the basic original pattern, and B is the density detection sensor of the developed basic original pattern image. Figure 5 shows the reading state; Figure 5 shows the relationship between the shading position of the basic original pattern image and the voltage conversion value of the reflected light; FIG. 6A and FIG. 6B are a flowchart of an embodiment of the present invention, and FIG. 7 is a circuit diagram thereof. 1... Photosensitive drum, 3... Exposure device, 4,
4', 4''...Developing unit, 7...Density detection sensor, 13...Original, 14...Contact glass, 15...Basic original pattern, 16...Dircular lamp, 18...Developing drum, 19... ...Basic original pattern image, V 1 , V 2 ... Voltage conversion value of reflected light, C
...Setting value depending on developer color.
Claims (1)
ーとを用いる二成分現像プロセスにより現像する
に際し、色の異なる現像剤を入れた複数の現像ユ
ニツトを交換、或いは設置された複数の現像ユニ
ツトのうちから選択することにより、色の異なる
画像を得るようにした電子写真複写装置におい
て、濃淡のある基本原稿パターンの感光体上の現
像濃度を反射光の量によつて読み取り、その濃淡
画像のそれぞれの反射光の比の値と、予じめ定め
た値との大小の比較によつて、そのトナー濃度制
御を行うに際し、その反射光の比の値と比較する
設定値を各現像剤の色に応じて切り換えることに
よつて、各色の現像剤濃度を制御しうるようにし
たことを特徴とするトナー濃度制御装置。1 When developing a latent image formed on a photoconductor by a two-component development process using carrier and toner, it is necessary to replace multiple developing units containing different colored developers or to change the number of installed multiple developing units. In an electrophotographic copying device that can obtain images with different colors by selecting one of the following, the developed density on the photoreceptor of a basic original pattern with shading is read by the amount of reflected light, and each of the shading images is When controlling the toner density by comparing the ratio value of the reflected light with a predetermined value, the set value to be compared with the ratio of the reflected light is determined for each developer color. 1. A toner concentration control device characterized in that the developer concentration of each color can be controlled by switching according to the toner concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58152867A JPS6045278A (en) | 1983-08-22 | 1983-08-22 | Toner concentration control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58152867A JPS6045278A (en) | 1983-08-22 | 1983-08-22 | Toner concentration control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6045278A JPS6045278A (en) | 1985-03-11 |
| JPH0473792B2 true JPH0473792B2 (en) | 1992-11-24 |
Family
ID=15549850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58152867A Granted JPS6045278A (en) | 1983-08-22 | 1983-08-22 | Toner concentration control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6045278A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2860965B2 (en) * | 1987-03-19 | 1999-02-24 | 株式会社リコー | Method and apparatus for controlling toner concentration |
| JPH08696Y2 (en) * | 1988-09-13 | 1996-01-10 | 株式会社リコー | Copier |
| JPH02100064A (en) * | 1988-10-07 | 1990-04-12 | Ricoh Co Ltd | color copier |
| US5292418A (en) * | 1991-03-08 | 1994-03-08 | Mitsubishi Denki Kabushiki Kaisha | Local laser plating apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543735A (en) * | 1977-06-08 | 1979-01-12 | Aisin Seiki Co Ltd | Steering force detector |
| JPS54143144A (en) * | 1978-04-14 | 1979-11-08 | Konishiroku Photo Ind Co Ltd | Image density detecting method and apparatus for zerographic copier |
| JPS56158356A (en) * | 1980-05-12 | 1981-12-07 | Canon Inc | Density control method for developer |
| JPS57136668A (en) * | 1981-02-18 | 1982-08-23 | Canon Inc | Developer density controller |
-
1983
- 1983-08-22 JP JP58152867A patent/JPS6045278A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6045278A (en) | 1985-03-11 |
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