JP2015143807A5 - - Google Patents
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- JP2015143807A5 JP2015143807A5 JP2014061252A JP2014061252A JP2015143807A5 JP 2015143807 A5 JP2015143807 A5 JP 2015143807A5 JP 2014061252 A JP2014061252 A JP 2014061252A JP 2014061252 A JP2014061252 A JP 2014061252A JP 2015143807 A5 JP2015143807 A5 JP 2015143807A5
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- 238000003384 imaging method Methods 0.000 claims description 39
- 239000000969 carrier Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000005755 formation reaction Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Description
上記目的を達成するために、請求項１の発明は、静電潜像を担持する像担持体と、前記像担持体に担持された静電潜像をトナー像に現像する現像手段と、該トナー像を記録媒体に転写された後の転写トナー像を記録媒体上に定着させる定着手段と、前回の作像動作を終了してから現在までに経過した経過時間、前回の作像動作を終了してから現在までの環境条件の変動、及び予測するときに直近の作像条件に基づいて予測して第１作像条件を作成する第１作像条件作成手段とを備える画像形成装置において、前記第１作像条件で補正用の第１トナーパターン像を前記現像手段によって前記像担持体上に形成し、前記補正用の第１トナーパターン像のトナー濃度を検知するトナー濃度検知手段と、該トナー濃度検知手段によって検知した前記補正用の第１トナーパターン像のトナー濃度値が狙いの値になるように前記第１作像条件を補正して第２作像条件を作成する第２作像条件作成手段とを備えることに特徴がある。 In order to achieve the above object, an invention according to claim 1 includes an image carrier that carries an electrostatic latent image, a developing unit that develops the electrostatic latent image carried on the image carrier into a toner image, Fixing means for fixing the transferred toner image on the recording medium after the toner image has been transferred to the recording medium, and the elapsed time elapsed from the end of the previous image forming operation to the present, and the previous image forming operation being ended. In the image forming apparatus, the first image forming condition creating means for creating the first image forming condition by predicting based on the latest image forming condition when predicting the fluctuation of the environmental condition from the present to the present, A toner density detecting means for forming a first toner pattern image for correction on the image carrier by the developing means under the first imaging condition, and detecting a toner density of the first toner pattern image for correction; The compensation detected by the toner density detecting means. And second image forming condition creating means for creating the second image forming condition by correcting the first image forming condition so that the toner density value of the first toner pattern image for use becomes a target value. There is.
以上に説明したものは一例であり、本発明は、次の態様毎に特有の効果を奏する。
（態様１）
静電潜像を担持する像担持体などの感光体ドラム１０３と、感光体ドラム１０３に担持された静電潜像をトナー像に現像する現像手段などの現像器１０６と、そのトナー像を記録媒体に転写された後の転写トナー像を記録媒体上に定着させる定着手段などの定着装置１１４と、前回の作像動作を終了してから現在までに経過した経過時間、前回の作像動作を終了してから現在までの環境条件の変動、及び予測するときに直近の作像条件に基づいて予測して、第１作像条件を作成する第１作像条件作成手段などの作像条件作成部２０４とを備える画像形成装置において、第１作像条件で補正用の第１トナーパターン像３０１を現像器１０６によって感光体ドラム１０３上に形成し、補正用の第１トナーパターン像３０１のトナー濃度を検知するトナー濃度検知手段などのトナー濃度検知部２０７と、トナー濃度検知部２０７によって検知した補正用の第１トナーパターン像３０１のトナー濃度値が狙いの値になるように第１作像条件を補正して第２作像条件を作成する第２作像条件作成手段などのトナー濃度調整部２０８とを備える。
これによれば、上記実施形態について説明したように、第１作像条件は、経過時間、環境条件変動及び予測するときに直近の作像条件に基づいて予測して作成されている。その経過時間や環境条件変動は、作像条件の予測を行うタイミングに応じて変動する数値であり、予測して作成された第１作像条件には狙いの作像条件との誤差が存在する。第２作像条件は、第１作像条件で作像されたトナー像のトナー濃度が狙いの値になるように第１作像条件を補正して作成されている。このため、第２作像条件で作像されたトナー像のトナー濃度は狙いの濃度になっており、経過時間及び環境条件によって第１作像条件に含まれている誤差を相殺することができる。よって、予測した第１作像条件より第２作像条件の精度を高くすることができる。
（態様２）
（態様１）において、作像動作開始までの所定時間内に、トナー濃度調整部２０８による第２作像条件の作成を行えるか否かを判定する第１判定手段などの主制御部２０１を備え、第２作像条件の作成を行える場合、所定時間内に、感光体ドラム１０３上に補正用の第１トナーパターン像３０１を形成し、補正用の第１トナーパターン像３０１のトナー濃度を検知して検知した補正用の第１トナーパターン像３０１のトナー濃度値が狙いの値になるように第１作像条件を補正して第２作像条件を作成し、第２作像条件の作成を行えない場合、作像動作中に、感光体ドラム１０３の画像形成領域外に補正用の第１トナーパターン像３０３を形成し、補正用の第１トナーパターン像３０３のトナー濃度を検知して検知した補正用の第１トナーパターン像３０３のトナー濃度値が狙いの値になるように第１作像条件を補正して第２作像条件を作成する。これによれば、上記実施形態について説明したように、作像動作開始までの所定時間内に、トナー濃度調整部２０８による第２作像条件の作成を行えるか否かを判定することで、所定時間内、具体的には定着器のウォームアップ時間内に、第２作像条件を作成できるときは所定時間内に第２作像条件を作成する。これにより、電源投入後のファーストページプリント時間やユーザの待機時間への影響を低減できる。所定時間内に第２作像条件を作成できないときは、作像動作中に第２作像条件を作成する。このときも、電源投入後のファーストページプリント時間やユーザの待機時間への影響を低減できるとともに、作像動作を中断することが減るので印刷のダウンタイムを短縮することができる。
（態様３）
（態様１）又は（態様２）において、トナー濃度検知部２０７によって検知した補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にあるか否かを判定する第２判定手段などの主制御部２０１と、互いに異なる濃度の複数の補正用の第２トナーパターン像を異なる作像条件で感光体ドラム１０３上に作成してそれらのトナー濃度を検知し、検知したトナー濃度値に基づいて第３作像条件を作成する第３作像条件作成手段などの画像濃度補正部２０９とを備え、主制御部２０１による判定結果で補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にあるときは、作像条件作成部２０４によって作成された第１作像条件又はトナー濃度調整部２０８によって作成された第２作像条件を作像条件に決定し、補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にないときは、画像濃度補正部２０９によって作成された第３作像条件を作像条件に決定する。これによれば、上記実施形態について説明したように、第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にないときのみ、画像濃度補正部２０９によって作成された第３作像条件を今回の作像条件として作成する。これにより、不要な印刷のダウンタイムを発生させることが減る。
（態様４）
（態様３）において、主制御部２０１による判定結果で補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にないときは、印刷ジョブ終了後に、画像濃度補正部２０９によって第３作像条件を作成する。これによれば、上記実施形態について説明したように、ユーザに不要な待機時間を発生させることなく、作像条件の精度を高くすることができる。
（態様５）
（態様３）において、主制御部２０１による判定結果で補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にないときは、現像器１０６のトナー濃度を調整した後に画像濃度補正部２０９によって第３作像条件を作成する。これによれば、上記実施形態について説明したように、第１作像条件の補正が適正でなかった場合のみ、トナー濃度を調整し、複数のトナーパターン像からなる第２トナーパターン像３０６から最適な作像条件を決定する。これにより、不要な印刷のダウンタイムを発生させることが減る。
（態様６）
（態様５）において、判定結果で補正用の第１トナーパターン像３０１、３０３のトナー濃度値が所定範囲内にないときは、実行中の印刷ジョブを中断し、現像器１０６のトナー濃度を調整した後に画像濃度補正部２０９によって第３作像条件を作成する。これによれば、上記実施形態について説明したように、印刷ジョブ終了後に画像濃度過多や画像濃度不足の画像不具合の発生を抑制し、不要な印刷のダウンタイムを発生させることなく、高画質の画像を形成することができる。
（態様７）
（態様１）〜（態様６）のいずれか一において、経過時間及び環境条件としての温湿度を検知する、計時部２０２や温湿度センサ２０３等の検知手段を備え、該検知手段によって検知した経過時間及び温湿度に基づいて像担持体に付着するトナー付着量と現像手段のトナー濃度との少なくとも１つを算出する第１算出手段と、作像手段によって作像された第１トナーパターン像を現像手段によって像担持体上に形成し補正用の第１トナーパターン像のトナー濃度とトナー付着量の少なくとも１つを算出する第２算出手段と、検知手段によって検知した経過時間及び環境条件に基づいて第１算出手段と第２算出手段とを切り替える切替手段とを有する。これによれば、上記実施形態について説明したように、印刷ジョブ終了後に画像濃度過多や画像濃度不足の画像不具合の発生を抑制し、不要な印刷のダウンタイムを発生させることなく、高画質の画像を形成することができる。
（態様８）
（態様７）において、像担持体上に形成されたトナー付着量を光学的に検知するトナー付着量検知手段と、現像手段のトナー濃度を検知するトナー濃度検知手段とを備える。これによれば、上記実施形態について説明したように、トナー付着量とトナー濃度の情報を取得することで、そのトナー付着量及びトナー濃度に応じて最適な作像条件を設定できる。
（態様９）
（態様８）において、第１算出手段は、トナー付着量検知手段によって検知したトナー付着量と、トナー濃度検知手段によって検知したトナー濃度との少なくとも１つに基づいて算出する。これによれば、上記実施形態について説明したように、トナー付着量とトナー濃度の情報を取得することで、そのトナー付着量及びトナー濃度に応じて最適な作像条件を設定できる。
（態様１０）
（態様７）〜（態様９）のいずれか一において、検知手段は、前回の作像動作を終了してから現在までに経過した経過時間を測る計時手段と、温度を測定する温度測定手段と、湿度を測定する湿度測定手段とを有し、第２算出手段は、計時手段による時間情報、温度測定手段による温度情報又は湿度測定手段による湿度情報の少なくとも１つの情報によりトナー付着量とトナー濃度の少なくとも１つを算出する。これによれば、上記実施形態について説明したように、経過時間や温湿度情報を検知しそれらの情報に基づいて算出したトナー付着量及びトナー濃度に応じて最適な作像条件を設定できる。
（態様１１）
（態様７）〜（態様１０）のいずれか一において、第１算出手段もしくは第２算出手段により得られたトナー付着量とトナー濃度により、作像条件を補正する。これによれば、上記実施形態について説明したように、トナー付着量及びトナー濃度に応じて最適な作像条件を設定できる。
（態様１２）
（態様７）〜（態様１１）のいずれか一において、作像手段は、帯電手段の帯電条件を補正する帯電条件補正手段と、露光手段の露光条件を補正する露光条件補正手段と、現像手段の現像条件を補正する現像条件補正手段と、トナー補給手段により現像手段のトナー濃度を調整するトナー濃度調整手段とを少なくとも１つ有し、帯電条件、露光条件、現像条件、トナー濃度調整の少なくとも１つを補正する。これによれば、上記実施形態について説明したように、帯電条件、露光条件、現像条件又はトナー濃度の少なくともいずれか１つを補正することで画質を安定することができる。
（態様１３）
（態様７）〜（態様１２）のいずれか一において、印刷枚数を計数して、該計数した印刷枚数が所定の印刷枚数を越えた場合には、印刷動作終了後に作像条件を補正する。これによれば、上記実施形態について説明したように、計数した印刷枚数が所定の印刷枚数を越えた場合のみ、印刷動作終了後に作像条件を補正され、不要なダウンタイムを発生することがない。
（態様１４）
（態様７）〜（態様１３）のいずれか一において、現像γにより作像条件の補正を行った場合に計数した印刷枚数を０に設定する。これによれば、上記実施形態について説明したように、現像γによる作像条件の補正の場合は、予測して作成した作像条件と比べて精度が高いので、判定基準としての印刷枚数をリセットする。予測して作像条件を作成する動作が連続された場合でも、計数した印刷枚数に基づいて現像γによる作像条件の補正が行われるため、画像濃度の安定性を高めることができる。
（態様１５）
（態様７）〜（態様１６）のいずれか一において、現像γにより作像条件の補正は、印刷動作終了後に行う。これによれば、上記実施形態について説明したように、ジョブエンドにて作像条件の調整動作を行うで、ユーザの不要な待機時間の発生を抑制できる。
What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect 1)
A photosensitive drum 103 such as an image carrier carrying an electrostatic latent image, a developing device 106 such as a developing unit for developing the electrostatic latent image carried on the photosensitive drum 103 into a toner image, and recording the toner image. Fixing device 114 such as fixing means for fixing the transferred toner image on the recording medium after being transferred to the medium, and the elapsed time and the previous image forming operation since the previous image forming operation was completed. Creation of imaging conditions such as first imaging condition creating means for creating a first imaging condition by predicting based on the latest imaging conditions when predicting the fluctuation of environmental conditions from the end to the present In the image forming apparatus including the unit 204, the first toner pattern image 301 for correction is formed on the photosensitive drum 103 by the developing device 106 under the first image forming condition, and the toner of the first toner pattern image 301 for correction is formed. Detect density The first image forming condition is corrected so that the toner density value of the toner density detecting unit 207 such as the toner density detecting unit and the correction first toner pattern image 301 detected by the toner density detecting unit 207 becomes a target value. And a toner density adjusting unit 208 such as second image forming condition creating means for creating the second image forming condition.
According to this, as described in the above embodiment, the first image formation condition is created by prediction based on the latest image formation condition when the elapsed time, the environmental condition variation and the prediction are performed. The elapsed time and the environmental condition fluctuation are numerical values that fluctuate according to the timing at which the imaging condition is predicted, and the first imaging condition created by prediction has an error from the target imaging condition. . The second image forming condition is created by correcting the first image forming condition so that the toner density of the toner image formed under the first image forming condition becomes a target value. For this reason, the toner density of the toner image created under the second imaging condition is a target density, and the error included in the first imaging condition can be offset by the elapsed time and the environmental condition. . Therefore, the accuracy of the second imaging condition can be made higher than the predicted first imaging condition.
(Aspect 2)
(Aspect 1) includes a main control unit 201 such as a first determination unit that determines whether or not the toner density adjusting unit 208 can create the second image forming condition within a predetermined time until the image forming operation starts. When the second image forming condition can be created, the first toner pattern image 301 for correction is formed on the photosensitive drum 103 within a predetermined time, and the toner density of the first toner pattern image 301 for correction is detected. The first image forming condition is corrected to create the second image forming condition so that the toner density value of the first toner pattern image 301 for correction detected in this way becomes a target value, and the second image forming condition is generated. When the image forming operation cannot be performed, the first toner pattern image for correction 303 is formed outside the image forming area of the photosensitive drum 103 during the image forming operation, and the toner density of the first toner pattern image for correction 303 is detected. Detected first toner pattern for correction Toner density value of down image 303 to create a second image forming condition by correcting the first image forming condition so that a target value. According to this, as described in the above embodiment, it is determined whether or not the second image forming condition can be created by the toner density adjusting unit 208 within a predetermined time until the image forming operation is started. If the second image forming condition can be created within the time, specifically within the warm-up time of the fixing device, the second image forming condition is created within a predetermined time. Thereby, the influence on the first page print time after power-on and the user's standby time can be reduced. If the second imaging condition cannot be created within a predetermined time, the second imaging condition is created during the imaging operation. Also at this time, the influence on the first page print time after the power is turned on and the waiting time of the user can be reduced, and the interruption of the image forming operation can be reduced, so that the print down time can be shortened.
(Aspect 3)
In (Aspect 1) or (Aspect 2), second determination means for determining whether or not the toner density values of the first toner pattern images 301 and 303 for correction detected by the toner density detection unit 207 are within a predetermined range. And the like, and a plurality of correction second toner pattern images having different densities are created on the photosensitive drum 103 under different image forming conditions, their toner densities are detected, and the detected toner density values And an image density correction unit 209 such as a third image formation condition generation unit that generates a third image formation condition based on the toner, and the toner of the first toner pattern images 301 and 303 for correction based on the determination result by the main control unit 201 When the density value is within the predetermined range, the first imaging condition created by the imaging condition creating unit 204 or the second imaging condition created by the toner density adjusting unit 208 is determined as the imaging condition. And, when the toner density value of the corrected first toner pattern image for 301 and 303 is not within the predetermined range, determines a third imaging condition created by the image density correction unit 209 to the image forming conditions. According to this, as described in the above embodiment, the third image formation condition created by the image density correction unit 209 is set only when the toner density values of the first toner pattern images 301 and 303 are not within the predetermined range. Created as the current imaging conditions. This reduces unnecessary printing downtime.
(Aspect 4)
In (Aspect 3), when the toner density value of the first toner pattern images 301 and 303 for correction is not within the predetermined range as a result of determination by the main control unit 201, the image density correction unit 209 performs the first operation after the print job is finished. 3 Create imaging conditions. According to this, as described in the above embodiment, it is possible to increase the accuracy of the image forming conditions without causing unnecessary waiting time for the user.
(Aspect 5)
In (Aspect 3), when the toner density values of the first toner pattern images 301 and 303 for correction are not within the predetermined range as a result of determination by the main control unit 201, the image density is adjusted after the toner density of the developing device 106 is adjusted. The correction unit 209 creates the third image forming condition. According to this, as described in the above embodiment, the toner density is adjusted only when the correction of the first image forming condition is not appropriate, and the optimum from the second toner pattern image 306 including a plurality of toner pattern images. The appropriate imaging conditions. This reduces unnecessary printing downtime.
(Aspect 6)
In (Aspect 5), when the toner density value of the correction first toner pattern images 301 and 303 is not within the predetermined range as a result of the determination, the print job being executed is interrupted and the toner density of the developing device 106 is adjusted. After that, the image density correction unit 209 creates a third image forming condition. According to this, as described in the above embodiment, it is possible to suppress the occurrence of an image defect having an excessive image density or an insufficient image density after the print job is completed, and to generate a high-quality image without causing unnecessary printing downtime. Can be formed.
(Aspect 7)
In any one of (Aspect 1) to (Aspect 6), a detection unit such as a time measuring unit 202 or a temperature / humidity sensor 203 that detects temperature and humidity as an elapsed time and an environmental condition is provided, and the detection is performed by the detection unit. First calculation means for calculating at least one of the amount of toner adhering to the image carrier and the toner density of the developing means based on time and temperature / humidity, and a first toner pattern image formed by the image forming means Based on the second calculating means for calculating at least one of the toner density and the toner adhesion amount of the first toner pattern image for correction formed on the image carrier by the developing means, and the elapsed time and the environmental condition detected by the detecting means. Switching means for switching between the first calculation means and the second calculation means. According to this, as described in the above embodiment, it is possible to suppress the occurrence of an image defect having an excessive image density or an insufficient image density after the print job is completed, and to generate a high-quality image without causing unnecessary printing downtime. Can be formed.
(Aspect 8)
In (Aspect 7), a toner adhesion amount detection unit that optically detects the toner adhesion amount formed on the image carrier and a toner density detection unit that detects the toner density of the development unit are provided. According to this, as described in the above embodiment, by acquiring the information on the toner adhesion amount and the toner density, it is possible to set the optimum image forming conditions according to the toner adhesion amount and the toner density.
(Aspect 9)
In (Aspect 8) , the first calculation means calculates based on at least one of the toner adhesion amount detected by the toner adhesion amount detection means and the toner concentration detected by the toner density detection means. According to this, as described in the above embodiment, by acquiring the information on the toner adhesion amount and the toner density, it is possible to set the optimum image forming conditions according to the toner adhesion amount and the toner density.
(Aspect 10)
In any one of (Aspect 7) to (Aspect 9), the detecting means includes a time measuring means for measuring an elapsed time since the previous imaging operation was completed, and a temperature measuring means for measuring a temperature. And a humidity measuring means for measuring humidity, wherein the second calculating means is based on at least one of time information by the time measuring means, temperature information by the temperature measuring means, or humidity information by the humidity measuring means. At least one of the following is calculated. According to this, as described in the above embodiment, it is possible to detect the elapsed time and temperature / humidity information and set the optimum image forming conditions according to the toner adhesion amount and the toner density calculated based on the information.
(Aspect 11)
In any one of (Aspect 7) to (Aspect 10), the image forming condition is corrected based on the toner adhesion amount and the toner density obtained by the first calculation means or the second calculation means. According to this, as described in the above embodiment, an optimum image forming condition can be set according to the toner adhesion amount and the toner density.
(Aspect 12)
In any one of (Aspect 7) to (Aspect 11), the image forming unit includes a charging condition correcting unit that corrects a charging condition of the charging unit, an exposure condition correcting unit that corrects an exposure condition of the exposing unit, and a developing unit. At least one of the developing condition correcting means for correcting the developing condition of the toner and the toner density adjusting means for adjusting the toner density of the developing means by the toner replenishing means, and at least charging conditions, exposure conditions, developing conditions, and toner density adjustment. Correct one. According to this, as above described, charging condition, exposure condition, the image quality by correcting at least one of developing conditions or the toner concentration can be stabilized.
(Aspect 13)
In any one of (Aspect 7) to (Aspect 12), the number of printed sheets is counted, and when the counted number of printed sheets exceeds a predetermined number of printed sheets, the image forming condition is corrected after the printing operation is completed. According to this, as described in the above embodiment, only when the counted number of printed sheets exceeds a predetermined number of printed sheets, the image forming conditions are corrected after the printing operation is completed, and unnecessary downtime does not occur. .
(Aspect 14)
In any one of (Aspect 7) to (Aspect 13), the number of printed sheets counted when the image forming condition is corrected by development γ is set to zero. According to this, as described in the above embodiment, in the case of correction of the image forming condition by development γ, the accuracy is higher than the image forming condition created by prediction, so the number of prints as a determination criterion is reset. To do. Even when the operation for creating the image forming conditions by prediction is continued, since the image forming conditions are corrected by the development γ based on the counted number of printed sheets, the stability of the image density can be improved.
(Aspect 15)
In any one of (Aspect 7) to (Aspect 16), the image forming condition is corrected by development γ after the printing operation is completed. According to this, as described in the above embodiment, the image forming condition adjustment operation is performed at the job end, so that unnecessary waiting time of the user can be suppressed.
Claims (15)
前記第１作像条件で補正用の第１トナーパターン像を前記現像手段によって前記像担持体上に形成し、前記補正用の第１トナーパターン像のトナー濃度を検知するトナー濃度検知手段と、
該トナー濃度検知手段によって検知した前記補正用の第１トナーパターン像のトナー濃度値が狙いの値になるように前記第１作像条件を補正して第２作像条件を作成する第２作像条件作成手段と
を備えることを特徴とする画像形成装置。 An image carrier that carries an electrostatic latent image, a developing unit that develops the electrostatic latent image carried on the image carrier into a toner image, and a transferred toner image after the toner image is transferred to a recording medium. Fixing means for fixing on the recording medium, the elapsed time since the last imaging operation was completed to the present , fluctuations in environmental conditions from the previous imaging operation to the present, and when predicting An image forming apparatus comprising: a first imaging condition creating unit that creates a first imaging condition by predicting based on the latest imaging condition;
A toner density detecting means for forming a first toner pattern image for correction on the image carrier by the developing means under the first imaging condition, and detecting a toner density of the first toner pattern image for correction;
A second image forming operation for generating a second image forming condition by correcting the first image forming condition so that the toner density value of the first toner pattern image for correction detected by the toner concentration detecting means becomes a target value. An image forming apparatus comprising: an image condition creating unit.
作像動作開始までの所定時間内に、前記第２作像条件作成手段による前記第２作像条件の作成を行えるか否かを判定する第１判定手段を備え、
前記第２作像条件の作成を行える場合、前記所定時間内に、前記像担持体上に前記補正用の第１トナーパターン像を形成し、前記補正用の第１トナーパターン像のトナー濃度を検知して検知した前記補正用の第１トナーパターン像のトナー濃度値が狙いの値になるように前記第１作像条件を補正して前記第２作像条件を作成し、
前記第２作像条件の作成を行えない場合、作像動作中に、前記像担持体の画像形成領域外に前記補正用の第１トナーパターン像を形成し、前記補正用の第１トナーパターン像のトナー濃度を検知して検知した前記補正用の第１トナーパターン像のトナー濃度値が狙いの値になるように前記第１作像条件を補正して前記第２作像条件を作成することを特徴とする画像形成装置。 The image forming apparatus according to claim 1.
A first determination unit that determines whether or not the second imaging condition creation unit can create the second imaging condition within a predetermined time until the start of the imaging operation;
When the second image forming condition can be created, the first toner pattern image for correction is formed on the image carrier within the predetermined time, and the toner density of the first toner pattern image for correction is set. The second image forming condition is created by correcting the first image forming condition so that the detected toner density value of the first toner pattern image for correction is a target value.
When the second image forming condition cannot be created, the first toner pattern image for correction is formed outside the image forming area of the image carrier during the image forming operation, and the first toner pattern for correction is formed. The second image forming condition is created by correcting the first image forming condition so that the toner density value of the first toner pattern image for correction detected by detecting the toner density of the image becomes a target value. An image forming apparatus.
前記トナー濃度検知手段によって検知した前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にあるか否かを判定する第２判定手段と、
互いに異なる濃度の複数の補正用の第２トナーパターン像を異なる作像条件で前記像担持体上に作成してそれらのトナー濃度を検知し、検知したトナー濃度値に基づいて第３作像条件を作成する第３作像条件作成手段とを備え、
該第２判定手段による判定結果で前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にあるときは、前記第１作像条件作成手段によって作成された前記第１作像条件又は前記第２作像条件作成手段によって作成された前記第２作像条件を作像条件に決定し、前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にないときは、前記第３作像条件作成手段によって作成された前記第３作像条件を作像条件に決定することを特徴とする画像形成装置。 The image forming apparatus according to claim 1, wherein
Second determination means for determining whether or not the toner density value of the first toner pattern image for correction detected by the toner density detection means is within a predetermined range;
A plurality of correction second toner pattern images having different densities are created on the image carrier under different image forming conditions, their toner densities are detected, and a third image forming condition is determined based on the detected toner density values. A third imaging condition creating means for creating
When the toner density value of the first toner pattern image for correction is within a predetermined range as a result of determination by the second determination unit, the first image formation condition created by the first image creation condition creation unit or When the second imaging condition created by the second imaging condition creating means is determined as an imaging condition and the toner density value of the first toner pattern image for correction is not within a predetermined range, An image forming apparatus, wherein the third image forming condition created by the three image forming condition creating means is determined as an image forming condition.
前記第２判定手段による判定結果で前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にないときは、印刷ジョブ終了後に、前記第３作像条件作成手段によって前記第３作像条件を作成することを特徴とする画像形成装置。 The image forming apparatus according to claim 3.
If the toner density value of the first toner pattern image for correction is not within a predetermined range as a result of the determination by the second determination unit, the third image formation condition generation unit performs the third image formation after the print job. An image forming apparatus characterized by creating a condition.
前記第２判定手段による判定結果で前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にないときは、現像手段のトナー濃度を調整した後に前記第３作像条件作成手段によって前記第３作像条件を作成することを特徴とする画像形成装置。 The image forming apparatus according to claim 3.
If the toner density value of the first toner pattern image for correction is not within a predetermined range as a result of determination by the second determining means, the third image forming condition creating means adjusts the toner density of the developing means and then An image forming apparatus that creates a third image forming condition.
前記第２判定手段による判定結果で前記補正用の第１トナーパターン像のトナー濃度値が所定範囲内にないときは、実行中の印刷ジョブを中断し、現像手段のトナー濃度を調整した後に前記第３作像条件作成手段によって前記第３作像条件を作成することを特徴とする画像形成装置。 The image forming apparatus according to claim 5.
If the toner density value of the first toner pattern image for correction is not within a predetermined range as a result of the determination by the second determining means, the print job being executed is interrupted and the toner density of the developing means is adjusted before the toner density value is adjusted. An image forming apparatus, wherein the third image forming condition is created by a third image forming condition creating means.
前記経過時間及び前記環境条件としての温湿度を検知する検知手段を備え、該検知手段によって検知した前記経過時間及び前記温湿度に基づいて前記像担持体に付着するトナーの付着量と前記現像手段のトナーの濃度との少なくとも１つを算出する第１算出手段と、作像手段によって作像された前記第１トナーパターン像を前記現像手段によって前記像担持体上に形成し前記補正用の第１トナーパターン像のトナー濃度とトナー付着量の少なくとも１つを算出する第２算出手段と、前記検知手段によって検知した前記経過時間及び前記環境条件に基づいて前記第１算出手段と前記第２算出手段とを切り替える切替手段とを有することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 1 to 6,
The developing unit includes a detecting unit that detects the elapsed time and temperature and humidity as the environmental condition, and the amount of toner attached to the image carrier and the developing unit based on the elapsed time and the temperature and humidity detected by the detecting unit. the of the first calculating means for calculating at least one of the density of the toner by the developing unit said first toner pattern image that is imaged by the imaging means is formed on the image bearing member for the correction A second calculation unit that calculates at least one of a toner density and a toner adhesion amount of one toner pattern image; and the first calculation unit and the second calculation based on the elapsed time and the environmental condition detected by the detection unit. An image forming apparatus comprising: a switching unit that switches between the units.
前記像担持体上に形成されたトナー付着量を光学的に検知するトナー付着量検知手段と、前記現像手段のトナー濃度を検知するトナー濃度検知手段とを備えることを特徴とする画像形成装置。 The image forming apparatus according to claim 7.
An image forming apparatus comprising: a toner adhesion amount detection unit that optically detects a toner adhesion amount formed on the image carrier; and a toner density detection unit that detects a toner density of the development unit .
前記第１算出手段は、前記トナー付着量検知手段によって検知した前記トナー付着量と、前記トナー濃度検知手段によって検知した前記トナー濃度との少なくとも１つに基づいて算出することを特徴とする画像形成装置。 The image forming apparatus according to claim 8 .
The first calculation unit calculates the image based on at least one of the toner adhesion amount detected by the toner adhesion amount detection unit and the toner concentration detected by the toner concentration detection unit. apparatus.
前記検知手段は、前回の作像動作を終了してから現在までに経過した経過時間を測る計時手段と、温度を測定する温度測定手段と、湿度を測定する湿度測定手段とを有し、前記第２算出手段は、前記計時手段による時間情報、前記温度測定手段による温度情報又は前記湿度測定手段による湿度情報の少なくとも１つの情報によりトナー付着量とトナー濃度の少なくとも１つを算出することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 7 to 9,
The detecting means includes a time measuring means for measuring an elapsed time since the last image forming operation was completed, a temperature measuring means for measuring temperature, and a humidity measuring means for measuring humidity, The second calculating means calculates at least one of the toner adhesion amount and the toner density based on at least one information of time information by the time measuring means, temperature information by the temperature measuring means, or humidity information by the humidity measuring means. An image forming apparatus.
前記第１算出手段もしくは前記第２算出手段により得られたトナー付着量とトナー濃度により、作像条件を補正することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 7 to 10, wherein
An image forming apparatus, wherein an image forming condition is corrected based on a toner adhesion amount and a toner density obtained by the first calculation unit or the second calculation unit.
前記作像手段は、帯電手段の帯電条件を補正する帯電条件補正手段と、露光手段の露光条件を補正する露光条件補正手段と、前記現像手段の現像条件を補正する現像条件補正手段と、トナー補給手段により前記現像手段のトナー濃度を調整するトナー濃度調整手段とを少なくとも１つ有し、前記帯電条件、前記露光条件、前記現像条件、前記トナー濃度の少なくとも１つを補正することを特徴とする画像形成装置。 The image forming apparatus according to claim 7, wherein:
Said imaging means includes a charging condition correcting means for correcting the charging condition of the strip conducting means, an exposure condition correction means for correcting the exposure conditions of the exposure light means, a developing condition correcting means for correcting the developing condition of said developing means , at least one and a toner density adjusting means for adjusting the toner concentration in the developing unit by preparative toner replenishing means, the charging conditions, the exposure conditions, the developing conditions, correcting at least one of said toner concentration An image forming apparatus.
印刷枚数を計数して、計数した印刷枚数が所定の印刷枚数を越えた場合には、印刷動作終了後に作像条件を補正することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 7 to 12,
By counting the number of printed sheets, when the number was the number of printed sheets count exceeds a predetermined number of printed sheets, the image forming apparatus and correcting image forming condition after the printing operation ends.
現像γにより作像条件の補正を行った場合に計数した印刷枚数を０に設定することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 7 to 13,
Image forming apparatus characterized by setting a counting the number of printed sheets when the correction was carried out in the image forming condition by the developing γ 0.
現像γにより作像条件の補正は、印刷動作終了後に行うことを特徴とする画像形成装置。 The image forming apparatus according to claim 7, wherein:
An image forming apparatus, wherein the image forming condition is corrected by the development γ after the printing operation is completed.
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