JP2001105578A5 - - Google Patents

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JP2001105578A5
JP2001105578A5 JP1999284936A JP28493699A JP2001105578A5 JP 2001105578 A5 JP2001105578 A5 JP 2001105578A5 JP 1999284936 A JP1999284936 A JP 1999284936A JP 28493699 A JP28493699 A JP 28493699A JP 2001105578 A5 JP2001105578 A5 JP 2001105578A5
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recording
pattern
optical sensor
density
correction
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JP2001105578A (en
JP4458586B2 (en
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Priority to US09/679,343 priority patent/US6832825B1/en
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【特許請求の範囲】
【請求項1】 複数の記録素子を有する記録ヘッドにより記録を行う記録装置において、
発光部と受光部とを具える光学センサと、
前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録媒体に前記光学センサの発光波長の範囲に応じた複数の所定パターンを記録するパターン形成手段と、
前記パターン形成手段により記録媒体に記録された前記複数のパターンそれぞれに対して前記光学センサの発光部より光を照射し、前記各パターンから反射された光を受光した前記受光部からの出力により前記パターンの光学特性を測定する測定手段と、
前記測定手段により測定された光学特性に基づき、前記記録ヘッドで用いる画像データの補正処理を行う補正手段と
を具えることを特徴とする記録装置。
【請求項2】 前記補正手段は、前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録すべき記録データの出力濃度値を、該記録データの濃度値に応じて補正する出力濃度補正テーブルを複数具え、
さらに前記光学センサによって読み取った各パターンの光学特性に基づき、前記出力濃度補正テーブルを選択する出力濃度補正テーブル選択手段を具えることを特徴とする請求項1に記載の記録装置。
【請求項3】 前記補正手段は、測定された各パターンの光学特性から最も低い濃度を検出し、その濃度を基準濃度とし、その基準濃度に対する各パターンの濃度比率を算出する算出手段をさらに具え、
前記出力濃度補正テーブル選択手段は、前記算出手段によって算出された濃度比率に基づき各パターンに対するブロック毎に出力濃度テーブルを選択することを特徴とする請求項2に記載の記録装置。
【請求項4】 前記パターンの色調に応じて前記光学センサの発光部または受光部をキャリブレーションするキャリブレーション手段をさらに具えることを特徴とする請求項1ないし3のいずれか1項に記載の記録装置。
【請求項5】 前記光学センサにおいて、発光部を駆動させる駆動部への駆動信号が変調可能であり、前記キャリブレーション手段は、該駆動信号を変調させることにより、キャリブレーションすることを特徴とする請求項4に記載の記録装置。
【請求項6】 前記光学センサの発光部は白色LEDであることを特徴とする請求項1ないし5のいずれかに記載の記録装置。
【請求項7】 前記パターンを形成する記録剤の色調が前記光学センサで検知できない波長のものであれば、
前記パターン形成手段は、前記光学センサで検知可能な色調の記録剤で下地を形成し、該下地の上に前記検知不可能な色調の記録剤でパターンを形成し、
前記測定手段は、前記パターン形成手段が形成した二次色のパターンを測定することを特徴とする請求項1ないし6のいずれか1項に記載の記録装置。
【請求項8】 前記光学センサは、波長の異なる光を発する複数の発光部および受光部を具えていることを特徴とする請求項1ないし5のいずれかに記載の記録装置。
【請求項9】 前記光学センサの発光部は緑色LED、赤色LED、青色LEDであることを特徴とする請求項8に記載の記録装置。
【請求項10】 前記記録素子は、インクジェット方式で記録を行うことを特徴とする請求項1ないし9のいずれかに記載の記録装置。
【請求項11】 前記補正手段は、前記記録素子のインク吐出量を調整することを特徴とする請求項10に記載の記録装置。
【請求項12】 前記記録素子は熱エネルギーを利用してインク中に気泡を生成し、該気泡の生成圧力によってインク滴を吐出することを特徴とする請求項10または11に記載の記録装置。
【請求項13】 複数の記録素子を有する記録ヘッドにより記録を行う記録装置を用いた濃度むら補正方法において、
発光部と受光部とを具える光学センサを用い、
前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録媒体に前記光学センサの発光波長の範囲に応じた複数の所定パターンを記録するパターン形成ステップと、
前記パターン形成手段により記録媒体に記録された前記複数のパターンそれぞれに対して前記光学センサの発光部より光を照射し、前記各パターンから反射された光を受光した前記受光部からの出力により前記パターンの光学特性を測定する測定ステップと、
前記測定手段により測定された光学特性に基づき、前記記録ヘッドで用いる画像データの補正処理を行う補正ステップと
を具えることを特徴とする濃度むら補正方法。
【請求項14】 前記補正ステップは、前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録すべき記録データの出力濃度値を、該記録データの濃度値に応じて補正する出力濃度補正テーブルを複数具え、
さらに前記光学センサによって読み取った各パターンの光学特性に基づき、前記出力濃度補正テーブルを選択する出力濃度補正テーブル選択ステップを具えることを特徴とする請求項13に記載の濃度むら補正方法。
【請求項15】 前記補正ステップは、測定された各パターンの光学特性から最も低い濃度を検出し、その濃度を基準濃度とし、その基準濃度に対する各パターンの濃度比率を算出する算出ステップをさらに具え、
前記出力濃度補正テーブル選択ステップは、前記算出ステップによって算出された濃度比率に基づき各パターンに対するブロック毎に出力濃度テーブルを選択することを特徴とする請求項14に記載の濃度むら補正方法。
【請求項16】 前記パターンの色調に応じて前記光学センサの発光部または受光部をキャリブレーションするキャリブレーションステップをさらに具えることを特徴とする請求項13ないし15のいずれか1項に記載の濃度むら補正方法。
【請求項17】 前記光学センサにおいて、発光部を駆動させる駆動部への駆動信号が変調可能であり、前記キャリブレーションステップは、該駆動信号を変調させることにより、キャリブレーションすることを特徴とする請求項16に記載の濃度むら補正方法。
【請求項18】 前記パターンを形成する記録剤の色調が前記光学センサで検知できない波長のものであれば、
前記パターン形成ステップは、前記光学センサで検知可能な色調の記録剤で下地を形成し、該下地の上に前記検知不可能な色調の記録剤でパターンを形成し、
前記測定ステップは、前記パターン形成手段が形成した二次色のパターンを測定することを特徴とする請求項13ないし17のいずれか1項に記載の濃度むら補正方法。
[Claims]
1. In a recording device that records by a recording head having a plurality of recording elements.
An optical sensor that has a light emitting part and a light receiving part,
A pattern forming means for recording a plurality of predetermined patterns according to the emission wavelength range of the optical sensor on a recording medium in units of the recording element or in units of blocks composed of a plurality of recording elements.
Each of the plurality of patterns recorded on the recording medium by the pattern forming means is irradiated with light from the light emitting unit of the optical sensor, and the light reflected from each pattern is received by the output from the light receiving unit. A measuring means for measuring the optical characteristics of each pattern,
A recording device including a correction means for performing correction processing of image data used in the recording head based on optical characteristics measured by the measuring means.
2. The correction means corrects the output density value of the recorded data to be recorded in the recording element unit or the block unit composed of a plurality of recording elements according to the density value of the recorded data. Have multiple tables,
The recording device according to claim 1, further comprising an output density correction table selection means for selecting the output density correction table based on the optical characteristics of each pattern read by the optical sensor.
3. The correction means further includes a calculation means for detecting the lowest density from the measured optical characteristics of each pattern, using the density as a reference density, and calculating the density ratio of each pattern with respect to the reference density. ,
The recording device according to claim 2, wherein the output density correction table selection means selects an output density table for each block for each pattern based on the density ratio calculated by the calculation means.
4. according to any one of claims 1 to 3, characterized in that it further comprises calibration means for calibrating the light emitting portion or light receiving portion of the optical sensor in response to the color tone of the pattern Recording device.
5. The optical sensor is characterized in that a drive signal to a drive unit that drives a light emitting unit can be modulated, and the calibration means calibrates by modulating the drive signal. The recording device according to claim 4.
6. The recording device according to claim 1, wherein the light emitting unit of the optical sensor is a white LED.
7. If the color tone of the recording agent forming the pattern has a wavelength that cannot be detected by the optical sensor,
The pattern forming means forms a base with a color tone recording agent that can be detected by the optical sensor, and forms a pattern on the base with the undetectable color tone recording agent.
Said measuring means, a recording apparatus according to any one of claims 1 to 6, characterized in that to measure the pattern forming means forms the secondary color pattern.
8. The recording device according to claim 1, wherein the optical sensor includes a plurality of light emitting units and light receiving units that emit light having different wavelengths.
9. The recording device according to claim 8, wherein the light emitting unit of the optical sensor is a green LED, a red LED, or a blue LED.
10. The recording device according to claim 1, wherein the recording element records by an inkjet method.
11. The recording device according to claim 10, wherein the correction means adjusts an ink ejection amount of the recording element.
12. The recording device according to claim 10, wherein the recording element uses heat energy to generate bubbles in the ink, and the ink droplets are discharged by the generation pressure of the bubbles.
13. In a method for correcting density unevenness using a recording device that records by a recording head having a plurality of recording elements.
Using an optical sensor that has a light emitting part and a light receiving part,
A pattern forming step of recording a plurality of predetermined patterns according to the emission wavelength range of the optical sensor on a recording medium in units of the recording element or in units of blocks composed of a plurality of recording elements.
Each of the plurality of patterns recorded on the recording medium by the pattern forming means is irradiated with light from the light emitting unit of the optical sensor, and the light reflected from each pattern is received by the output from the light receiving unit. Measurement steps to measure the optical characteristics of each pattern,
A method for correcting density unevenness, which comprises a correction step for performing correction processing of image data used in the recording head based on optical characteristics measured by the measuring means.
14. The correction step corrects the output density value of the recorded data to be recorded in the recording element unit or the block unit composed of a plurality of recording elements according to the density value of the recorded data. Have multiple tables,
The density unevenness correction method according to claim 13, further comprising an output density correction table selection step for selecting the output density correction table based on the optical characteristics of each pattern read by the optical sensor.
15. The correction step further includes a calculation step of detecting the lowest density from the measured optical characteristics of each pattern, using that density as a reference density, and calculating the density ratio of each pattern with respect to the reference density. ,
The density unevenness correction method according to claim 14, wherein the output density correction table selection step selects an output density table for each block for each pattern based on the density ratio calculated by the calculation step.
16. according to any one of claims 13 to 15, characterized by further comprising a calibration step of calibrating the light emitting portion or light receiving portion of the optical sensor in response to the color tone of the pattern Density unevenness correction method.
17. The optical sensor is characterized in that a drive signal to a drive unit that drives a light emitting unit can be modulated, and the calibration step is calibrated by modulating the drive signal. The method for correcting density unevenness according to claim 16.
18. If the color tone of the recording agent forming the pattern has a wavelength that cannot be detected by the optical sensor,
In the pattern formation step, a base is formed with a color tone recording agent that can be detected by the optical sensor, and a pattern is formed on the base with the undetectable color tone recording agent.
It said measuring step, density unevenness correction process according to any one of claims 13 to 17, characterized in that measuring the secondary color pattern where the pattern forming means to form.

【0012】
【課題を解決するための手段】
本発明の記録装置は、複数の記録素子を有する記録ヘッドにより記録を行う記録装置において、発光部と受光部とを具える光学センサと、前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録媒体に前記光学センサの発光波長の範囲に応じた複数の所定パターンを記録するパターン形成手段と、前記パターン形成手段により記録媒体に記録された前記複数のパターンそれぞれに対して前記光学センサの発光部より光を照射し、前記各パターンから反射された光を受光した前記受光部からの出力により前記パターンの光学特性を測定する測定手段と、前記測定手段により測定された光学特性に基づき、前記記録ヘッドで用いる画像データの補正処理を行う補正手段とを具えることを特徴とする。
0012
[Means for solving problems]
The recording device of the present invention is a recording device that records by a recording head having a plurality of recording elements, in which an optical sensor including a light emitting unit and a light receiving unit, the recording element unit, or a block unit including the plurality of recording elements. The pattern forming means for recording a plurality of predetermined patterns according to the range of the emission wavelength of the optical sensor on the recording medium, and the optical sensor for each of the plurality of patterns recorded on the recording medium by the pattern forming means. Based on the measuring means that irradiates light from the light emitting unit and measures the optical characteristics of each pattern by the output from the light receiving unit that receives the light reflected from each pattern, and the optical characteristics measured by the measuring means. It is characterized by including a correction means for performing correction processing of image data used in the recording head.

また、本発明の濃度むら補正方法は、複数の記録素子を有する記録ヘッドにより記録を行う記録装置を用いた濃度むら補正方法において、発光部と受光部とを具える光学センサを用い、前記記録素子単位、あるいは複数の記録素子から成るブロック単位で記録媒体に前記光学センサの発光波長の範囲に応じた複数の所定パターンを記録するパターン形成ステップと、前記パターン形成手段により記録媒体に記録された前記複数のパターンそれぞれに対して前記光学センサの発光部より光を照射し、前記各パターンから反射された光を受光した前記受光部からの出力により前記パターンの光学特性を測定する測定ステップと、前記測定手段により測定された光学特性に基づき、前記記録ヘッドで用いる画像データの補正処理を行う補正ステップとを具えることを特徴とする。
Further, the density unevenness correction method of the present invention is a density unevenness correction method using a recording device that records with a recording head having a plurality of recording elements, and the recording is performed by using an optical sensor including a light emitting unit and a light receiving unit. A pattern forming step of recording a plurality of predetermined patterns according to the range of the emission wavelength of the optical sensor on a recording medium in an element unit or a block unit composed of a plurality of recording elements, and recording on the recording medium by the pattern forming means. A measurement step of irradiating each of the plurality of patterns with light from the light emitting portion of the optical sensor and measuring the optical characteristics of the respective patterns by the output from the light receiving portion that receives the light reflected from the respective patterns. It is characterized by including a correction step for performing correction processing of image data used in the recording head based on the optical characteristics measured by the measuring means.

JP28493699A 1999-10-05 1999-10-05 Recording apparatus and density unevenness correction method Expired - Fee Related JP4458586B2 (en)

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JP28493699A JP4458586B2 (en) 1999-10-05 1999-10-05 Recording apparatus and density unevenness correction method
US09/679,343 US6832825B1 (en) 1999-10-05 2000-10-04 Test pattern printing method, information processing apparatus, printing apparatus and density variation correction method

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US6659578B2 (en) * 2001-10-02 2003-12-09 Hewlett-Packard Development Company, L.P. Tuning system for a compact optical sensor
JP2003237112A (en) * 2002-02-15 2003-08-27 Konica Corp Medical image recorder and method for correcting density
JP2004160449A (en) 2002-10-24 2004-06-10 Seiko Epson Corp Device manufacturing equipment and device manufacturing method, electronic instrument
WO2005016648A1 (en) * 2003-08-15 2005-02-24 Seiko Epson Corporation Printer and print system
JP4645020B2 (en) 2003-11-07 2011-03-09 セイコーエプソン株式会社 Printing system, printing apparatus, printing control apparatus, program, and printing method
JP2005231179A (en) * 2004-02-19 2005-09-02 Fuji Xerox Co Ltd Ink jet recorder and image processor
JP4988276B2 (en) * 2006-09-05 2012-08-01 理想科学工業株式会社 Recording failure detection method and program
JP5067135B2 (en) * 2007-11-13 2012-11-07 セイコーエプソン株式会社 Liquid ejection device
JP5177868B2 (en) * 2008-06-30 2013-04-10 富士フイルム株式会社 Ink jet recording apparatus and droplet ejection detection method
JP5636273B2 (en) * 2010-12-22 2014-12-03 理想科学工業株式会社 Density adjustment module and density adjustment method for ink jet recording apparatus
JP5891701B2 (en) * 2011-10-19 2016-03-23 セイコーエプソン株式会社 Printing apparatus and correction method
JP6992450B2 (en) * 2017-11-29 2022-02-04 セイコーエプソン株式会社 Printing equipment

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