JPH0786709B2 - Copy density adjustment method - Google Patents
Copy density adjustment methodInfo
- Publication number
- JPH0786709B2 JPH0786709B2 JP62004177A JP417787A JPH0786709B2 JP H0786709 B2 JPH0786709 B2 JP H0786709B2 JP 62004177 A JP62004177 A JP 62004177A JP 417787 A JP417787 A JP 417787A JP H0786709 B2 JPH0786709 B2 JP H0786709B2
- Authority
- JP
- Japan
- Prior art keywords
- density
- copy
- copy density
- copying
- copying machine
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電子写真複写機によつて得られる複写物のコピ
ー濃度の調整方法に関するものである。The present invention relates to a method for adjusting the copy density of a copy obtained by an electrophotographic copying machine.
〔従来の技術・発明が解決すべき問題点〕 電子写真複写機を使用するに当り、例えば感光体を交換
するとき、現像剤を交換するとき、または長期間の使用
によりコピー濃度に変化を生じたときなどには、複写機
の専門保守要員がそのときのコピー濃度を判定し、コピ
ー濃度に寄与する各種のパラメーター、例えば感光体の
帯電電流、現像器のバイアス電位、光源の光度、トナー
濃度などを調整して所望のコピー濃度が得られるように
しているが、このような方法では保守要員に高度の熟練
と技術が要求され、場合によつては誤調整を招くことが
あり、不馴れな一般の使用者にはとうてい満足に実施す
ることができなかつた。また、長期間使用によるコピー
濃度の変化に対しては、例えば特開昭50−20730号、特
開昭50−22642号の発明に開示されているコピー濃度制
御技術があるが、これらの公知の技術においては、直接
コピー濃度の検出・判定・調整を行うのではなく、その
代用特性を検出・判定し、コピー濃度に関連するパラメ
ーターを調整している。すなわち、前者の発明では原稿
濃度と略一致する画像濃度の被検知像を原稿と同時に露
光して、感材上に得られた被検知像の潜像電位を検出
し、これからトナー供給量を制御しており、後者の発明
は予め選択した濃度を有する中間濃度サンプルを照光し
て光導電体面上に記録されたサンプルの潜像電荷を検知
し、これからトナー粒子の供給を制御している。しかし
ながら、このような代用特性と実際のコピー濃度との関
係は常に一定であることが保証されず、環境によりある
いは経時的諸因子により変化することが観察されてい
て、充分満足のできるコピー濃度の調整方法は未だ得ら
れていない。[Problems to be solved by the prior art / invention] When using an electrophotographic copying machine, for example, when the photoconductor is replaced, the developer is replaced, or a long-term use causes a change in copy density. In this case, the maintenance personnel of the copier determines the copy density at that time, and various parameters that contribute to the copy density, such as the charging current of the photoconductor, the bias potential of the developing device, the luminous intensity of the light source, and the toner density. Is adjusted to obtain a desired copy density.However, such a method requires a high level of skill and skill for maintenance personnel, and in some cases, it may cause misadjustment, which is unfamiliar. It could not be implemented satisfactorily for general users. Regarding the change in copy density due to long-term use, there are copy density control techniques disclosed in the inventions of JP-A Nos. 50-20730 and 50-22642. In the technology, instead of directly detecting, judging, or adjusting the copy density, the substitute characteristic is detected or judged, and the parameters related to the copy density are adjusted. That is, in the former invention, a detected image having an image density that substantially matches the original density is exposed at the same time as the original, the latent image potential of the detected image obtained on the photosensitive material is detected, and the toner supply amount is controlled from this. The latter invention illuminates an intermediate density sample having a preselected density to detect the latent image charge of the sample recorded on the photoconductor surface and from there control the supply of toner particles. However, such a relationship between the substitute characteristic and the actual copy density is not always guaranteed to be constant, and it has been observed that the relationship varies depending on the environment or various factors over time. The adjustment method has not been obtained yet.
本発明によれば、上記の問題点は、標準濃度原稿の複写
物に相応する濃度基準値が予め設定されている複写機に
より前記標準濃度原稿を複写紙に複写し、該複写紙を複
写機の原稿載置台上に載置し、該複写画像の濃度を前記
複写機の走査系又はレンズ系に設けられてたセンサーに
よって複写と同様の走査の中で測定し、該測定値と予め
設定されている前記基準値とを比較し、その比較結果に
基づいてコピー濃度に寄与するパラメーターを調整する
ことを特徴とするコピー濃度調整方法によつて解決され
る。According to the present invention, the above-mentioned problems are caused by copying the standard density original document onto a copy sheet by a copying machine having a density reference value corresponding to a copy of the standard density original document set in advance, and copying the copy sheet. Is placed on the original placing table, the density of the copied image is measured in the same scanning as copying by a sensor provided in the scanning system or the lens system of the copying machine, and the measured value is preset. It is solved by a method for adjusting copy density, characterized in that the parameter contributing to copy density is adjusted based on the comparison result.
更に、標準濃度原稿の実際の複写物の濃度測定が複写機
の走査系又はレンズ系に設けられているセンサーによっ
て複写と同様の露光走査の中で行われる様にすることが
できる。Further, it is possible to measure the density of the actual copy of the standard density original in the same exposure scanning as copying by a sensor provided in the scanning system or lens system of the copying machine.
つまり、本発明のコピー濃度調整方法は、濃度パターン
が複写された複写紙を複写機の原稿載置台上に載置し、
実際の複写経路と同様の光学経路でその中に配置されて
いる同一のセンサーを使用し、実際の複写動作と同様の
動作を用いて画像濃度測定を行い、フィードバックをか
けるという構成である。従って、濃度パターンの複写物
を複写時と同一のセンサーを用いて濃度測定することが
でき、検出時と複写時の相関もとる必要がなく、この点
についての誤差は原理的に発生しない。That is, according to the copy density adjusting method of the present invention, the copy paper on which the density pattern is copied is placed on the original placing table of the copying machine,
The same sensor is arranged in an optical path similar to the actual copy path, and the image density is measured using the same operation as the actual copy operation, and feedback is applied. Therefore, it is possible to measure the density of the copy of the density pattern using the same sensor as in copying, and it is not necessary to take the correlation between the time of detection and the time of copying, and an error in this respect does not occur in principle.
なお、ここで標準濃度とは細線、中間調、カラーパター
ンを含むものとする。The standard density includes thin lines, halftones, and color patterns.
以下に図面を参照しながら、本発明の実施態様を詳しく
説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明を説明するための図であり、原稿載置台
（１）上に標準濃度原稿（A1）を載置し、光源（２）で
露光し、ミラー（31,32,33）、レンズ系（４）、ミラー
（34,35,36）を介して感光体ドラム（５）上に標準濃度
原稿（A1）の静電潜像を形成し、現像機（６）でこの潜
像を現像してトナー像を得、用紙トレー（12）から供給
されてくる用紙に転写器（７）によりトナー像を転写
し、定着器（11）で定着し、標準濃度原稿のコピーが得
られる。ここで標準濃度原稿は複写機内に常時保管する
か、または使用者が保管していてもよい。なお、転写を
終了した感光体ドラムは清掃器（８）、除電用光源
（９）を経てその表面をクリーニングされた後、再び帯
電器（10）により帯電されて次の複写作業の準備がなさ
れる。次に、標準濃度原稿のコピーを原稿載置台（１）
上に載置し、光源（２）を含む走査光学系に取り付けた
光センサー（C1）によりそのコピー濃度を検出する。こ
のコピー濃度の検出はレンズ系（４）の近傍に設けた光
センサー（C2）によつて検出してもよく、または標準濃
度原稿コピーを感光体ドラム（５）に露光し、感光体ド
ラム表面上に形成される静電潜像の電位を、感光体ドラ
ムの近傍に設けた表面電位計（V1）によつて測定しコピ
ー濃度を検出することもできる。FIG. 1 is a diagram for explaining the present invention. A standard density original (A 1 ) is placed on an original placing table (1), exposed by a light source (2), and mirrors (31, 32, 33). ), The lens system (4) and the mirrors (34, 35, 36) to form an electrostatic latent image of the standard density original (A 1 ) on the photoconductor drum (5), The latent image is developed to obtain a toner image, the toner image is transferred to the paper supplied from the paper tray (12) by the transfer device (7), and is fixed by the fixing device (11). can get. Here, the standard density original document may be always stored in the copying machine or may be stored by the user. The surface of the photoconductive drum which has been transferred is cleaned by the cleaning device (8) and the light source (9) for discharging electricity, and then charged again by the charging device (10) to prepare for the next copying operation. It Next, make a copy of the standard density original on the original table (1).
The copy density is detected by an optical sensor (C 1 ) placed on the scanning optical system including the light source (2). The copy density may be detected by an optical sensor (C 2 ) provided in the vicinity of the lens system (4), or a standard density original copy is exposed on the photoconductor drum (5) and then the photoconductor drum (5) is exposed. It is also possible to detect the copy density by measuring the potential of the electrostatic latent image formed on the surface with a surface electrometer (V 1 ) provided near the photosensitive drum.
このようにして検出されたコピー濃度（検出濃度Ｄ）か
ら、コピー濃度と光センサー（例えばC1）との間の関係
（第２図参照）に基づいて、基準濃度（D0）との差ΔＤ
＝Ｄ−D0を求める。一方、帯電器（10）の帯電電流
（Ａ）とコピー濃度（Ｄ）との第３図のグラフに示した
ような関係に基づいて、ΔＤに相当するΔＡ＝Ａ−A
0（A0：基準濃度に対応する基準帯電電流）を求め、得
られたΔＡにより帯電器への供給電流を制御することが
できる。こうして所望のコピー濃度を与える帯電電流が
設定され、以後満足な複写作業に入ることができる。The difference between the detected copy density (detection density D) and the reference density (D 0 ) based on the relationship between the copy density and the optical sensor (for example, C 1 ) (see FIG. 2). ΔD
= D-D 0 is calculated. On the other hand, based on the relationship between the charging current (A) of the charger (10) and the copy density (D) as shown in the graph of FIG. 3, ΔA corresponding to ΔD = A−A
It is possible to obtain 0 (A 0 : reference charging current corresponding to the reference concentration), and control the supply current to the charger by the obtained ΔA. In this way, the charging current giving the desired copy density is set, and thereafter a satisfactory copying operation can be started.
上記の説明では、帯電電流を制御することによりコピー
濃度を調整する場合について述べたが、コピー濃度調整
のパラメーターとしては現像器のバイアス電圧、光源の
発光強度（蛍光灯の場合には管電流、タングステン、ハ
ロゲン灯では電圧）、また２成分現像の場合には現像器
内のトナー量などのパラメーターを１つまたは２つ以上
の組合せを採用してコピー濃度の調整を行うこともでき
る。なお、これらのパラメーターのうち、帯電電流、現
像バイアス電圧、光源の光量によるときは迅速なコピー
濃度調整ができるが、トナー量をパラメーターにすると
きにはコピー濃度の調整に稍長い時間が必要である。In the above description, the case where the copy density is adjusted by controlling the charging current has been described, but as the parameters of the copy density adjustment, the bias voltage of the developing device, the light emission intensity of the light source (tube current in the case of a fluorescent lamp, It is also possible to adjust the copy density by adopting one or a combination of two or more parameters such as the amount of toner in the developing device in the case of two-component development, in the case of two-component development). Among these parameters, when the charging current, the developing bias voltage, and the light amount of the light source are used, rapid copy density adjustment is possible, but when the toner amount is used as a parameter, it takes a long time to adjust the copy density.
本発明のコピー濃度調整方法によれば、濃度パターンの
複写物を複写時と同一のセンサーを用いて濃度測定する
ことができ、検出時と複写時の相関もとる必要がなく、
この点についての誤差は原理的に発生しない。よって、
最終の出力状態（用紙上）での濃度検出を用紙平面度
や、明るさ等の室内環境が常に安定した状態で実行でき
る。つまり、コピー濃度の調整が極めて容易、かつ完全
に行われ、複写機の保守要員の作業が簡易化されかつ誤
調整の発生が防止され、またコピー濃度の判定・調整の
ために特に保守要員に教育を行う必要がなく、熟練して
いない一般使用者でも容易にコピー濃度調整を行うこと
ができる利益がある。According to the copy density adjusting method of the present invention, it is possible to measure the density of a copy of a density pattern by using the same sensor as that at the time of copying, and it is not necessary to take the correlation between the time of detection and the time of copying.
In principle, no error occurs at this point. Therefore,
The density detection in the final output state (on paper) can be executed in a state where the indoor environment such as paper flatness and brightness is always stable. In other words, the adjustment of copy density is extremely easy and complete, the work of the maintenance personnel of the copying machine is simplified and the occurrence of erroneous adjustments is prevented, and especially for maintenance personnel to judge and adjust the copy density. There is an advantage that even an unskilled general user can easily perform copy density adjustment without the need for education.
第１図は本発明を説明するための図、第２図はコピー濃
度と光センサー（C1）の出力との関係を示すグラフ、第
３図は帯電電流とコピー濃度との関係を示すグラフであ
る。 図中符号： １……原稿載置台、２……光源、31〜36……ミラー、４
……レンズ系、５……感光体ドラム、６……現像器、７
……転写器、８……清掃器、９……除電用光源、10……
帯電器、11……定着器、12……コピー搬出装置、A1……
標準濃度原稿、C1，C2……光センサー、V1……表面電位
計。FIG. 1 is a diagram for explaining the present invention, FIG. 2 is a graph showing the relationship between copy density and the output of an optical sensor (C 1 ), and FIG. 3 is a graph showing the relationship between charging current and copy density. Is. Reference numerals in the figure: 1 ... original placing table, 2 ... light source, 31 to 36 ... mirror, 4
...... Lens system, 5 …… Photosensitive drum, 6 …… Developer, 7
...... Transfer device, 8 …… Cleaning device, 9 …… Static erasing light source, 10 ……
Charger, 11 …… Fixer, 12 …… Copy carry-out device, A 1 ……
Standard density original document, C 1 , C 2 …… Photo sensor, V 1 …… Surface electrometer.
Claims (1)
値が予め設定されている複写機により前記標準濃度原稿
を複写紙に複写し、該複写紙を複写機の原稿載置台上に
載置し、該複写画像の濃度を前記複写機の走査系又はレ
ンズ系に設けられたセンサーによって複写と同様の走査
の中で測定し、該測定値と予め設定されている前記基準
値とを比較し、その比較結果に基づいてコピー濃度に寄
与するパラメータを調整することを特徴とするコピー濃
度調整方法。1. A standard density original document is copied onto a copy sheet by a copying machine in which a standard density value corresponding to a copy of the standard density original document is preset, and the copy sheet is placed on the original table of the copying machine. Then, the density of the copied image is measured by the sensor provided in the scanning system or the lens system of the copying machine in the same scanning as copying, and the measured value is compared with the preset reference value. Then, the copy density adjusting method is characterized in that the parameters contributing to the copy density are adjusted based on the comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62004177A JPH0786709B2 (en) | 1987-01-13 | 1987-01-13 | Copy density adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62004177A JPH0786709B2 (en) | 1987-01-13 | 1987-01-13 | Copy density adjustment method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8215920A Division JP2713291B2 (en) | 1996-07-30 | 1996-07-30 | Adjusting copy density |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63173068A JPS63173068A (en) | 1988-07-16 |
| JPH0786709B2 true JPH0786709B2 (en) | 1995-09-20 |
Family
ID=11577430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62004177A Expired - Fee Related JPH0786709B2 (en) | 1987-01-13 | 1987-01-13 | Copy density adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0786709B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2732992B2 (en) * | 1992-09-24 | 1998-03-30 | 三田工業株式会社 | Image forming device |
| JP4863891B2 (en) * | 2007-01-23 | 2012-01-25 | 株式会社シマノ | Double bearing reel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760348A (en) * | 1980-09-27 | 1982-04-12 | Ricoh Co Ltd | Method for adjusting picture density for copying machine |
| JPS5785062A (en) * | 1980-11-17 | 1982-05-27 | Fuji Xerox Co Ltd | Control device for copying density of electrophotographic copier |
| JPS6049351A (en) * | 1983-08-27 | 1985-03-18 | Mita Ind Co Ltd | Image output device |
-
1987
- 1987-01-13 JP JP62004177A patent/JPH0786709B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63173068A (en) | 1988-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |