JPS63173068A - Adjusting method for copy density - Google Patents
Adjusting method for copy densityInfo
- Publication number
- JPS63173068A JPS63173068A JP62004177A JP417787A JPS63173068A JP S63173068 A JPS63173068 A JP S63173068A JP 62004177 A JP62004177 A JP 62004177A JP 417787 A JP417787 A JP 417787A JP S63173068 A JPS63173068 A JP S63173068A
- Authority
- JP
- Japan
- Prior art keywords
- density
- copy
- copy density
- original
- detected
- 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
- 238000000034 method Methods 0.000 title claims description 12
- 230000003287 optical effect Effects 0.000 abstract description 11
- 108091008695 photoreceptors Proteins 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005513 bias potential Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- -1 tungsten halogen Chemical class 0.000 description 1
Abstract
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って得られる複写゛ 物の
コピー濃度の調整方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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、ま念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光、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、場合によっ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
なかつ念。ま九、長期間使用によるコピー！１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匹るコピー濃度
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
で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 conventional technology/invention] When using an electrophotographic copying machine, for example, when replacing the photoreceptor or developer, the copy density may change due to long-term use. When this happens, specialized maintenance personnel for the copying machine determine the copy density at that time and check various parameters that contribute to the copy density, such as the charging light of the photoconductor, the bias potential of the developer, the luminous intensity of the light source, The toner density etc. are adjusted to obtain the desired copy density, but
This method requires a high level of skill and technique from maintenance personnel, and may lead to incorrect adjustments in some cases, making it difficult for an inexperienced general user to perform it satisfactorily. Copy due to long-term use! For example, there are copy density control techniques disclosed in Japanese Patent Application Laid-open Nos. 50-20730 and 1982-22642 for one-degree change, but these known techniques do not directly control Rather than detecting, determining, and adjusting copy density, its substitute characteristics are detected and determined, and parameters related to copy density are adjusted. That is, in the former invention, a detected image with 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 sensitive material is detected, and the toner supply amount is controlled from this. In the latter invention, a medium density sample having a preselected density is illuminated and the latent image charge of the sample recorded on the photoconductor surface is sensed from which the supply of toner particles is controlled. However, the relationship between such substitute characteristics and the actual copy density is not guaranteed to always be constant, and has been observed to change depending on the environment or due to various factors over time. An adjustment method has not yet been found.
〔問題点を解決するための手段・作用コ本発明によれば
、上記の問題点は、標準濃度原稿または複写機の走査系
のプリスキャン部あるいはポストスキャン部に設は念標
準濃度板から得喪複写物に光照射してそのコピー濃度を
検出・判定するか、ｔ７’ｌ−は複写物のコピーａ度を
直接検出・判定し、こうして得た判定結果に基づいてコ
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って解決される。[Means and effects for solving the problem] According to the present invention, the above problem can be solved by removing the standard density original from the standard density plate or by installing it in the pre-scan section or the post-scan section of the scanning system of the copying machine. Either the copy density is detected and determined by irradiating the copy with light, or the t7'l- directly detects and determines the degree of copy a of the copy, and the parameters contributing to the copy density are determined based on the determination result thus obtained. The problem is solved by a copy density adjustment method characterized by adjusting.
なお、ここで標準ａ度とは細線、中間調、カラーパター
ンを含むものとする。Note that the standard a degree includes fine 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。Embodiments of the present invention will be described in detail below 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（Ａ８）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（ｓａ、 ３５．３６） を介して感光
体ドラム（５）上に標準濃度原稿（Ａりの静電潜像を形
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、ま九は使用者が保管
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）ｔ−経てその表面をク
リーニングされ念後、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！１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摩り付けた光センサ−（ｃｌ）に
よりそのコピー濃度を検出する。このコピーａ度の検出
はレンズ系（４）の近傍に設けた光センサ−（Ｏｘ）に
よって検出してもよく、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（ｖｌ）によっ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, in which a standard density original (A8) is placed on the original placing table (1), and the light source (2) is
Mirrors (31, 32, 33), lens system (
4), an electrostatic latent image of standard density original (A) is formed on the photoreceptor drum (5) via a mirror (sa, 35, 36), and this latent image is developed with a developing machine (6). A toner image is obtained, the toner image is transferred by a transfer device (7) to paper supplied from a paper tray (12), and fixed by a fixing device (11) to obtain a copy of a standard density original. The density original can be kept in the copying machine at all times, or it can be kept by the user.After the transfer, the photosensitive drum is removed from the cleaning machine (8), the static eliminating light source (9), and then the photosensitive drum. After cleaning the surface, it is charged again by the charger (10) to prepare for the next copying operation.Next, a standard copy of the original is placed on the original table (1), Light source (2
) The copy density is detected by an optical sensor (cl) attached to a scanning optical system including: The degree of copy a may be detected by an optical sensor (Ox) provided near the lens system (4), or by exposing a standard density original copy to the photoreceptor drum (5) and exposing the photoreceptor drum surface to light. The copy density can also be detected by measuring the potential of the electrostatic latent image formed thereon with a surface electrometer (vl) provided near the photoreceptor drum.
なお、定着器（１１）から出て来る標準濃度原稿のコピ
ーを原稿載置台に載置して前記のようなコピー濃度検出
過程を経る代りに、コピー搬出装置（１２）の上方に設
けた光センサー（Ｃ３）によって、定着器から出て来る
コピーのコピー濃度を直ちに検出することもできる。Note that instead of placing the copy of the standard density original coming out of the fixing device (11) on the document table and going through the copy density detection process as described above, a light source installed above the copy delivery device (12) is used. The sensor (C3) also makes it possible to immediately detect the copy density of the copy coming out of the fuser.
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−（例えばＣｔ）との間の関
係（第２図参照）に基づいて、基準濃度（Ｄ６）との差
ΔＤ ＝ Ｄ −Ｄ、 ｆｔ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
のグラフに示し九ような関係に基づいて、ΔＤに相当す
るΔＡ＝Ａ−Ａ６ （Ａｏ：基準濃度に対応する基準
帯電電ｉ）を求め、得られたΔムにより帯電器への供給
′を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。Based on the copy density detected in this way (detected density D), the difference ΔD from the reference density (D6) is determined based on the relationship between the copy density and the optical sensor (for example, Ct) (see FIG. 2). = D - D, find ft. On the other hand, the charger (
10) Based on the relationship between the charging current (A) and the copy density (D) as shown in the graph of FIG. The electric current i) can be determined, and the flow of supply to the charger can be controlled using the obtained Δm. In this way, the charging current that provides the desired copy density is set, and a satisfactory copying operation can then 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念が、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つま念は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。In the above explanation, we are talking about adjusting the copy density by controlling the charging current, but the parameters for adjusting the copy density include the bias voltage of the developer, the light emission intensity of the light source (in the case of fluorescent lamps, the tube current, Copy density can also be adjusted by using a combination of two or more parameters, such as voltage (in the case of a tungsten halogen lamp) or amount of toner in the developing device in the case of two-component development.
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。Among these parameters, when using the charging current, developing bias voltage, and light intensity of the light source, quick copy density adjustment is possible, but when the toner amount is used as a parameter, it takes a rather long time to adjust the copy density.
本発明の他の実施態様によれば、複写機の走査系プリス
キャン部に設けられ九標準濃度板（Ａｔ）から通常の複
写工程（光学走査系は走査を行わせても停止させたまま
でもよい）を経てコピーを得、このコピーを原稿載置台
上に載置して前記と同様にそのコピー濃度を検出・判定
するか、または定着器から出て来るコピーのコピー濃度
をコピー搬出装置（１２）の上方にある光センサ−（Ｃ
１）によって直ちに検出・判定することができる。なお
。According to another embodiment of the present invention, a nine-standard density plate (At) is provided in a pre-scan section of the scanning system of a copying machine, and the optical scanning system can be scanned or stopped during the normal copying process. Either you obtain a copy through the copying device (good), place this copy on a document tray, and detect and judge the copy density in the same way as above, or you can detect and judge the copy density of the copy coming out of the fixing device by using the copy delivery device ( 12) Above the optical sensor (C
1) allows for immediate detection and determination. In addition.
ここで複写機に取り付けられている標準濃度板（ム＊）
を用いて得たコピーのコピー濃度を、コピー搬出装置の
上方に設けられた光センサ−（Ｃ３）で検出・判定する
自動化された機構を採用するときには、作業者は複写機
への通電スイッチを入れるだけでコピー濃度の調整を全
く自動的に達成することができる。Here, the standard density plate (mu*) attached to the copying machine
When adopting an automated mechanism that detects and determines the copy density of copies obtained using the copy machine using an optical sensor (C3) installed above the copy delivery device, the operator must turn on the power switch to the copy machine. Copy density adjustment can be achieved completely automatically by simply inserting the image.
本発明によれば、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
整の九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 present invention, the copy density can be adjusted extremely easily and completely, the work of the maintenance personnel of the copying machine is simplified, and the occurrence of erroneous adjustment is prevented. There is an advantage that there is no need to particularly train maintenance personnel, and even unskilled general users can easily adjust the copy density.
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−（ＣＩ）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。
■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、ム電・・・標準濃度原稿
、ム「・・標準濃度板、０１ｓＯａｓｅｓ・・・光セン
サ−、Ｖ、・・・表面電位計。
（ほか１名）FIG. 1 is a diagram for explaining the present invention, and FIG. 2 is a graph showing the relationship between copy density and output of the optical sensor (CI).
FIG. 3 is a graph showing the relationship between charging current and copy density. ■Inside code: 1...Original table, 2...Light source, 31-36...
Mirror, 4... Lens system, 5... Photosensitive drum, 6
...Developer, 7...Transfer device, 8...Cleaning device, 9.
...Light source for static elimination, 10...Charging device, 11...Fixing device, 12...Copy delivery device, Mu electric...Standard density original, Mu'...Standard density plate, 01sOases...Light Sensor, V, ... surface electrometer. (1 other person)
Claims (1)
標準濃度板から得た複写物のコピー濃度を検出・判定し
、その判定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
。 ２）標準濃度原稿または標準濃度板から得た複写物を複
写機の原稿載置台上に載置して光照射し、そのコピー濃
度を検出・判定することを特徴とする特許請求の範囲第
１項に記載のコピー濃度調整方法。[Claims] 1) Detecting and determining the copy density of a standard density original or a copy obtained from a standard density plate provided in a part of the scanning system of a copying machine, and contributing to the copy density based on the judgment result. A copy density adjustment method characterized by adjusting a parameter. 2) A copy obtained from a standard-density original or a standard-density plate is placed on a document table of a copying machine, irradiated with light, and the copy density is detected and determined. Copy density adjustment method described in section.
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 true JPS63173068A (en) | 1988-07-16 |
| JPH0786709B2 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06102740A (en) * | 1992-09-24 | 1994-04-15 | Mita Ind Co Ltd | Image forming device |
| JP2008178316A (en) * | 2007-01-23 | 2008-08-07 | Shimano Inc | Double bearing reel |
Citations (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
Patent Citations (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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06102740A (en) * | 1992-09-24 | 1994-04-15 | Mita Ind Co Ltd | Image forming device |
| JP2008178316A (en) * | 2007-01-23 | 2008-08-07 | Shimano Inc | Double bearing reel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0786709B2 (en) | 1995-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2738749B2 (en) | Image forming device | |
| JPS63503488A (en) | patch generator | |
| US5045882A (en) | Xerographic setup and operating system for electrostatographic reproduction machines | |
| US5016050A (en) | Xerographic setup and operating system for electrostatographic reproduction machines | |
| JPH0541993B2 (en) | ||
| US5051781A (en) | Xerographic setup and operating system for electrostatographic reproduction machines | |
| JPS63173068A (en) | Adjusting method for copy density | |
| JP2751185B2 (en) | Image density control device | |
| US5006892A (en) | Xerographic setup and operating system for electrostatographic reproduction machines | |
| JP3214515B2 (en) | Method of measuring surface voltage of photoreceptor | |
| US4992829A (en) | Flash lamp intensity control for electrostatographic reproduction machines | |
| JPS5912455A (en) | Control device of image density in electrophotographic copying machine | |
| JP2713291B2 (en) | Adjusting copy density | |
| JP2521947B2 (en) | Development density control device | |
| JPS59174862A (en) | Stabilizing method of density of copy image | |
| JP3515246B2 (en) | Density detection apparatus and density detection method used in image forming apparatus | |
| JPS6367184B2 (en) | ||
| JPS60189766A (en) | Image density controller | |
| JPS5887560A (en) | Copying machine | |
| JP4055924B2 (en) | Image forming apparatus, method for determining control setting value of image forming process, and recording medium | |
| JPH01147572A (en) | Image forming device | |
| JP2509262B2 (en) | Image forming device | |
| JP2600224B2 (en) | Copier | |
| JPH0594073A (en) | Copied image density stabilizing method and device therefor | |
| JPH0398064A (en) | Image forming device by reversal development system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |