JPS60257457A - Control method of automatic density adjustment - Google Patents
Control method of automatic density adjustmentInfo
- Publication number
- JPS60257457A JPS60257457A JP59113911A JP11391184A JPS60257457A JP S60257457 A JPS60257457 A JP S60257457A JP 59113911 A JP59113911 A JP 59113911A JP 11391184 A JP11391184 A JP 11391184A JP S60257457 A JPS60257457 A JP S60257457A
- Authority
- JP
- Japan
- Prior art keywords
- density adjustment
- error
- automatic density
- automatic
- adjustment
- 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.)
- Pending
Links
- 230000002401 inhibitory effect Effects 0.000 claims abstract 2
- 229910000943 NiAl Inorganic materials 0.000 claims 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims 1
- 101100524646 Toxoplasma gondii ROM6 gene Proteins 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業−１−の利用分野〕
この発明は自動濃度調整機能を′有する画像形成機器に
おけるその自動的な濃１駈を′調整する装置の側倒１に
関するものである。[Detailed Description of the Invention] [Field of Application in Industry-1-] This invention relates to a device for automatically adjusting the darkening speed in an image forming apparatus having an automatic density adjustment function. .
従来、複写機には、サンブリンクのだめのクーゲット像
を接写してその複写像に」：る自動濃度調整の機能を有
するものがある。７自動的な濃度の調１１又は、濃度を
可変し得る露光量等のファクタを自動的に適１１−値に
設定するようコントロールするこ己：にまって行なわれ
るが、その基準となるターケラト像の濃淡を判断するた
めの濃度検知出力を取り出す自動濃度調整用のセンサが
汚れた９、あるいは感何が劣化したりした場合、自動濃
度調整の誤差が大きくなり、一定基準のクーゲット像の
濃淡の判断が正確に行なわれなくなる。Conventionally, some copying machines have an automatic density adjustment function that takes a close-up copy of a couget image in a sunblink container and produces a copy of the image. 7 Automatic adjustment of density 11 or control to automatically set factors such as exposure amount that can vary the density to an appropriate value 11 This is done according to the Terkerat image that serves as the reference. If the sensor for automatic density adjustment, which extracts the density detection output for determining the shading of the image, is dirty or the sensor has deteriorated, the error in automatic density adjustment will increase, and the shading of the Kugett image based on a certain standard will increase. Judgments will no longer be made accurately.
この発明はこのように自動濃度調整の誤差が大きくなっ
た場合にそれによりかえって画質のみたＪｌが生じＪ気
質な画質を維持できなくなるという問題を解決しようと
するものである。The present invention is intended to solve the problem that when the error in automatic density adjustment becomes large as described above, Jl is caused that deteriorates the image quality, making it impossible to maintain the J-like image quality.
〔問題点を解決するだめの手段及び作用〕この発明は、
このため、一定基準のクーゲット像を用いた自動濃度調
整の誤差が大きくなったときに、自動濃度調整を禁止さ
せるようにし、誤差が大きくなった状態では誤差による
画質のみだれの発生を阻止すべく以後自動濃度調整は行
なわれないようにしたものである。[Means and effects for solving the problem] This invention has the following features:
For this reason, when the error in automatic density adjustment using a fixed standard Couget image becomes large, automatic density adjustment is prohibited, and in a state where the error becomes large, in order to prevent image quality from deteriorating due to the error. Automatic density adjustment is no longer performed thereafter.
以下、この発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図及び第２図はこの発明の一実施例を示すもので、
サンプリングのための一’Ａｌｌ基準のターゲツト像を
複写機の感光体ドラム十に現像し、そのトナー像の濃度
を検知して自動濃度調整を行なう場合に適用した例を示
す。FIG. 1 and FIG. 2 show an embodiment of this invention.
An example will be shown in which a target image based on the 1'All standard for sampling is developed on a photosensitive drum of a copying machine, and the density of the toner image is detected to perform automatic density adjustment.
第１図において、（１）は感光体トラム面と対向するよ
う設けられた濃度読取センサ、（２）はその検知出力を
予め定められた基準値と比較して濃淡を判断する濃度読
取装置で、自動濃度調整装置（３）は濃淡に応じて濃度
を可変し得るファクタを適正値に設定するようにする。In Figure 1, (1) is a density reading sensor installed to face the surface of the photoconductor tram, and (2) is a density reading device that compares its detection output with a predetermined reference value to judge the density. The automatic density adjustment device (3) sets a factor that can vary the density depending on the density to an appropriate value.
（４）は複写機に設けられたマイクロコンピュータの中
央処理装置（ＣＰＵ）、＋５１はランダム・アクセス・
メモリ（ＲＡＭ）、＋６１はリード・オンリー・メモリ
（ＲＯＭ）で、このＲＯＭ＋６１内には、第２図にフロ
チャートで示すように、自動濃度調整の誤差が大きくな
った場合には、その自動濃度調整を禁止し、濃度読取装
置（２）の出力にかかわらす、自動的に成る一定のレベ
ルで濃度調整を行なうようにするプログラムが格納され
ている。上記ＣＩ）Ｕ（４１は、自動濃度調整の誤差が
大きくなったときに、もはや感光体ドラム上に現像され
たターゲット像の濃淡による自動濃度調整は行なイつせ
ず、強制、伯に一定のレベルで濃度調整を行なわせるよ
う制御する。(4) is the central processing unit (CPU) of the microcomputer installed in the copying machine, +51 is the random access
The memory (RAM) +61 is a read-only memory (ROM), and as shown in the flowchart in Figure 2, this ROM +61 stores information about the automatic density when the error in automatic density adjustment becomes large. A program is stored that prohibits adjustment and automatically adjusts the concentration at a constant level regardless of the output of the concentration reading device (2). The above CI) U (41) does not perform automatic density adjustment based on the density of the target image developed on the photoreceptor drum when the error in automatic density adjustment becomes large, but remains forced and constant. The density is controlled to be adjusted at the level of .
すなわち、第２図に示すように、トナーの付着していな
い感光体ドラム面をサンプリングし、その→）”ンブリ
ング値が危険値以下か否かを判別し、このようにして自
動濃度調整の誤差を検出する。In other words, as shown in Fig. 2, the surface of the photoreceptor drum to which toner is not attached is sampled, and it is determined whether the →)' mixing value is below the dangerous value, and in this way, errors in automatic density adjustment are detected. Detect.
−１−記判別ステップにおいてＮｏの判別結果が得られ
たときには、自動濃度調整に際してそのターゲット像の
濃淡の判断が許容し得る範囲で正確に行なえるものと判
断し、このプログラムを終了させるが、−上述のように
サンプリングして得られるサンプリング値は小さい程ド
ラム面は汚れていることになるので、もし上記判別ステ
ップの判別結果がＹＥＳの場合には、自動濃度調整に当
って、誤差が許容できない程大きくなり、ターゲツト像
の濃淡の判断が適確に行なえず、かえ゛つて誤差による
コピー質のみだれを生じてしまう状態になったとみなし
、自動濃度調整を禁止し、自動的に成る一定のレベルで
濃度調整を行なうよう制御する。-1- When a determination result of No is obtained in the determination step described above, it is determined that the density of the target image can be accurately determined within an allowable range during automatic density adjustment, and this program is terminated. - As mentioned above, the smaller the sampling value obtained by sampling, the dirtier the drum surface is, so if the judgment result in the judgment step above is YES, the error is within the allowable range for automatic density adjustment. It is assumed that the density of the target image cannot be judged accurately and the copy quality deteriorates due to errors, so automatic density adjustment is prohibited, and automatic density adjustment is disabled. Control the density adjustment using the level.
このようにして、自動濃度調整の誤差が大きくなった場
合には、依然としてその状態で自動的な濃度の調整を行
なわせるようにするのではなく、自動濃度調整を禁止さ
せることにより誤差によるコピー質のみだれをなくすこ
とがてきる９、シかも、禁止した場合に、その後は自動
的に一定のし・＼ルで濃度調整を行なうようにもしてい
るので、ザーヒスマンが定期訪問するまでの短期的なコ
ピー質の維持を図ることもできる。In this way, when the error in automatic density adjustment becomes large, instead of allowing the automatic density adjustment to continue in that state, the copy quality due to the error is improved by disabling automatic density adjustment. 9. It may be possible to get rid of the drool, but if it is prohibited, the concentration will be automatically adjusted at a certain rate after that, so it will be used in the short term until Zahisman visits regularly. It is also possible to maintain good copy quality.
以上のように、この発明は、自動濃度調整の誤差が大き
くなった場合のその誤差に起因する画質のみだれを未然
に防止することができるので、誤差が大きくなった状態
で自動濃度調整を継続させた場合にかえって画質のみだ
れを招くことになるという弊害をなくすことができると
いう効果を有する１、As described above, the present invention can prevent deterioration of image quality caused by the error when the error in automatic density adjustment becomes large, so automatic density adjustment can be continued even when the error becomes large. 1, which has the effect of eliminating the negative effect of deteriorating the image quality when
第１図はこの発明の一実施例に用いる制御系のブロック
図、第２図はその制御動作の一例を示すフロチャ−トで
ある、。
符号説明
（１）・・・・・・濃度読取センサ
（３）・・・・・・自動濃度調整装置
（４）・・・・・・ＣＰＵ
（６）・・・・・・ＲＯＭ
！ｌ’、’ｌ許出願人 富士ゼロックス株式会社代理人
弁理土中村智廣
同 同 成瀬勝夫FIG. 1 is a block diagram of a control system used in an embodiment of the present invention, and FIG. 2 is a flowchart showing an example of its control operation. Explanation of symbols (1)...Concentration reading sensor (3)...Automatic density adjustment device (4)...CPU (6)...ROM! l','l Applicant Fuji Xerox Co., Ltd. Agent Tomohiro Nakamura Patent Attorney Katsuo Naruse
Claims (1)
−にに形成しその濃淡により自動的に濃度を調整する画
像形成機器において、自動濃度調整の誤差を検出し、そ
の誤差が大きくなった場合、所定のＩノベルで濃度、ｉ
ｌ、ｉｌ ｌｉｄが行なわれるよう自動濃度ＮｉＡｌ整
を禁止するこ士を特徴とする自動イ震度調整の制御方法
３゜Certain groups for Sunblink? In an image forming device that forms a p target image on a photosensitive material and automatically adjusts the density according to its shading, an error in automatic density adjustment is detected, and if the error becomes large, the density is adjusted in a predetermined I novel. ,i
3. Control method for automatic seismic intensity adjustment characterized by inhibiting automatic concentration NiAl adjustment so that l, il lid is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59113911A JPS60257457A (en) | 1984-06-05 | 1984-06-05 | Control method of automatic density adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59113911A JPS60257457A (en) | 1984-06-05 | 1984-06-05 | Control method of automatic density adjustment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60257457A true JPS60257457A (en) | 1985-12-19 |
Family
ID=14624271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59113911A Pending JPS60257457A (en) | 1984-06-05 | 1984-06-05 | Control method of automatic density adjustment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60257457A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695254A (en) * | 1979-12-28 | 1981-08-01 | Canon Inc | Electrostatic recorder |
| JPS56156841A (en) * | 1980-05-09 | 1981-12-03 | Toshiba Corp | Electronic copying machine |
| JPS57118255A (en) * | 1981-01-14 | 1982-07-23 | Canon Inc | Electrostatic recorder |
| JPS57129453A (en) * | 1981-02-05 | 1982-08-11 | Ricoh Co Ltd | Multi-mode copying machine |
| JPS5879244A (en) * | 1981-11-05 | 1983-05-13 | Ricoh Co Ltd | Controller for copying machine |
| JPS58106559A (en) * | 1981-12-21 | 1983-06-24 | Ricoh Co Ltd | Recording density controlling method |
| JPS58118662A (en) * | 1982-01-08 | 1983-07-14 | Ricoh Co Ltd | Image controlling device |
| JPS58209755A (en) * | 1982-05-31 | 1983-12-06 | Canon Inc | Image formation |
| JPS5987465A (en) * | 1982-11-11 | 1984-05-21 | Ricoh Co Ltd | Method for controlling recording density |
-
1984
- 1984-06-05 JP JP59113911A patent/JPS60257457A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695254A (en) * | 1979-12-28 | 1981-08-01 | Canon Inc | Electrostatic recorder |
| JPS56156841A (en) * | 1980-05-09 | 1981-12-03 | Toshiba Corp | Electronic copying machine |
| JPS57118255A (en) * | 1981-01-14 | 1982-07-23 | Canon Inc | Electrostatic recorder |
| JPS57129453A (en) * | 1981-02-05 | 1982-08-11 | Ricoh Co Ltd | Multi-mode copying machine |
| JPS5879244A (en) * | 1981-11-05 | 1983-05-13 | Ricoh Co Ltd | Controller for copying machine |
| JPS58106559A (en) * | 1981-12-21 | 1983-06-24 | Ricoh Co Ltd | Recording density controlling method |
| JPS58118662A (en) * | 1982-01-08 | 1983-07-14 | Ricoh Co Ltd | Image controlling device |
| JPS58209755A (en) * | 1982-05-31 | 1983-12-06 | Canon Inc | Image formation |
| JPS5987465A (en) * | 1982-11-11 | 1984-05-21 | Ricoh Co Ltd | Method for controlling recording density |
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