JP5744391B2 - 画像形成装置 - Google Patents
画像形成装置 Download PDFInfo
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- JP5744391B2 JP5744391B2 JP2009270102A JP2009270102A JP5744391B2 JP 5744391 B2 JP5744391 B2 JP 5744391B2 JP 2009270102 A JP2009270102 A JP 2009270102A JP 2009270102 A JP2009270102 A JP 2009270102A JP 5744391 B2 JP5744391 B2 JP 5744391B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
- B41J2/471—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
- B41J2/473—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror using multiple light beams, wavelengths or colours
-
- 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
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/32—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
- G03G15/326—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by application of light, e.g. using a LED array
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/455—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using laser arrays, the laser array being smaller than the medium to be recorded
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
- G06K15/1209—Intensity control of the optical beam
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
- G06K15/1257—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line
- G06K15/1261—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on more than one main scanning line using an array of light sources
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/128—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers generating or processing printable items, e.g. characters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/047—Detection, control or error compensation of scanning velocity or position
- H04N1/0473—Detection, control or error compensation of scanning velocity or position in subscanning direction, e.g. picture start or line-to-line synchronisation
-
- 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
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
- G03G15/0435—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure by introducing an optical element in the optical path, e.g. a filter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/04—Scanning arrangements
- H04N2201/047—Detection, control or error compensation of scanning velocity or position
- H04N2201/04753—Control or error compensation of scanning position or velocity
- H04N2201/04794—Varying the control or compensation during the scan, e.g. using continuous feedback or from line to line
- H04N2201/04796—Varying the sub-scan control during the main-scan, e.g. for correcting skew, tilt or bow of a scanning beam
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Facsimile Scanning Arrangements (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
前記修正された注目画素の値に応じて前記光源を駆動する駆動手段とを有し、前記第1のフィルタ係数は、前記主走査方向における前記注目画素の位置における、前記注目画素に対応する光ビームの露光位置と前記注目画素の上流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第1間隔に応じており、前記第2のフィルタ係数は、前記注目画素に対応する光ビームの露光位置と前記注目画素の下流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第2間隔に応じていることを特徴とする。
IMAGE_OUT=IMAGE_IN×K0+IMAGE_L1+IMAGE_L2×K2
フィルタ係数K2は、N−1ライン目の隣接画素のレーザスポットと注目画素のレーザスポットが理想よりも近い場合には負の値をとり、理想よりも遠い場合には正の値をとる。同様に、フィルタ係数K0は、N+1ライン目の隣接画素のレーザスポットと注目画素のレーザスポットが理想よりも近い場合には負の値をとり、理想よりも遠い場合には正の値をとる。つまり、隣接画素のレーザスポットと注目画素のレーザスポットが理想よりも近い(走査線間のピッチが密)場合には、注目画素の濃度を減少させ、隣接画素のレーザスポットと注目画素のレーザスポットが理想よりも遠い(走査線間のピッチが粗)場合には、注目画素の濃度を増加させる。このようにして、注目画素の画像データIMAGE_L1は、副走査方向の隣接画素のレーザスポットとの粗密の度合、及び、副走査方向の隣接画素の画像データIMAGE_L2,IMAGE_INに応じて増減され、画像データIMAGE_OUTとして出力される。
SA=YAn+(MAn/NAn)×(X−XAn)
SB=YBn+(MBn/NBn)×(X−XBn)
314 レーザピッチ補正部
103 フィルタ演算部
Claims (4)
- 1つの感光体上を露光する複数の光ビームを出射する複数の光源と、
前記複数の光ビームが前記感光体上を走査するように、前記複数の光ビームを偏向する偏向部と、
前記偏向された複数の光ビームが通過するレンズと、
前記レンズを通過した前記複数の光ビームによって露光される前記感光体と、
前記光ビームが走査する方向に対応する主走査方向における注目画素の位置情報に応じて、第1および第2のフィルタ係数を含むフィルタ係数を設定する設定手段と、
前記主走査方向に直交する副走査方向において前記注目画素の上流側に位置する周辺画素の値と前記第1フィルタ係数との演算の結果、および該副走査方向において該注目画素の下流側に位置する周辺画素の値と前記第2フィルタ係数との演算の結果を用いて、該注目画素の値を修正するフィルタ処理手段と、
前記修正された注目画素の値に応じて前記光源を駆動する駆動手段とを有し、
前記第1のフィルタ係数は、前記主走査方向における前記注目画素の位置における、前記注目画素に対応する光ビームの露光位置と前記注目画素の上流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第1間隔に応じており、前記第2のフィルタ係数は、前記注目画素に対応する光ビームの露光位置と前記注目画素の下流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第2間隔に応じている
ことを特徴とする画像形成装置。 - 前記複数の光源のそれぞれに対応させてプロファイルを保持する保持手段と、
前記プロファイルと前記注目画素の位置情報とに基づき、前記第1間隔および前記第2間隔を算出する算出手段とを有し、
前記プロファイルは該プロファイルが対応する前記光源から出射される光ビームの走査線の湾曲特性を示すことを特徴とする請求項1記載の画像形成装置。 - 前記フィルタ処理手段は、前記第1および第2間隔が狭い場合は前記注目画素の濃度が低くなるように前記注目画素の値を修正し、前記第1および第2間隔が広い場合は前記注目画素の濃度が高くなるように前記注目画素の値を修正することを特徴とする請求項1または2記載の画像形成装置。
- 1つの感光体上を露光する複数の光ビームを出射する複数の光源と、前記複数の光ビームが前記感光体上を走査するように、前記複数の光ビームを偏向する偏向部と、前記偏向された複数の光ビームが通過するレンズと、前記レンズを通過した前記複数の光ビームによって露光される前記感光体とを有する画像形成装置のための画像処理方法であって、
前記光ビームが走査する方向に対応する主走査方向における注目画素の位置情報に応じて、第1および第2のフィルタ係数を含むフィルタ係数を設定し、
前記主走査方向に直交する副走査方向において前記注目画素の上流側に位置する周辺画素の値と前記第1フィルタ係数との演算の結果、および該副走査方向において該注目画素の下流側に位置する周辺画素の値と前記第2フィルタ係数との演算の結果を用いて、該注目画素の値を修正するフィルタ処理する画像処理方法であり、
前記第1のフィルタ係数は、前記主走査方向における前記注目画素の位置における、前記注目画素に対応する光ビームの露光位置と前記注目画素の上流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第1間隔に応じており、前記第2のフィルタ係数は、前記注目画素に対応する光ビームの露光位置と前記注目画素の下流側に位置する周辺画素に対応する光ビームの露光位置との間隔である第2間隔に応じている
ことを特徴とする画像処理方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009270102A JP5744391B2 (ja) | 2009-11-27 | 2009-11-27 | 画像形成装置 |
EP10191807.6A EP2333617B1 (en) | 2009-11-27 | 2010-11-19 | Image forming apparatus |
KR1020100115737A KR101401750B1 (ko) | 2009-11-27 | 2010-11-19 | 화상 형성 장치 및 화상 처리 방법 |
US12/954,172 US9308743B2 (en) | 2009-11-27 | 2010-11-24 | Image forming apparatus |
CN201010568503.0A CN102081229B (zh) | 2009-11-27 | 2010-11-26 | 图像形成设备 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009270102A JP5744391B2 (ja) | 2009-11-27 | 2009-11-27 | 画像形成装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2011110846A JP2011110846A (ja) | 2011-06-09 |
JP2011110846A5 JP2011110846A5 (ja) | 2013-03-21 |
JP5744391B2 true JP5744391B2 (ja) | 2015-07-08 |
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JP2009270102A Active JP5744391B2 (ja) | 2009-11-27 | 2009-11-27 | 画像形成装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9308743B2 (ja) |
EP (1) | EP2333617B1 (ja) |
JP (1) | JP5744391B2 (ja) |
KR (1) | KR101401750B1 (ja) |
CN (1) | CN102081229B (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5930750B2 (ja) * | 2012-02-10 | 2016-06-08 | キヤノン株式会社 | 画像形成装置及び画像形成方法 |
EP3025516B1 (en) | 2013-07-22 | 2020-11-04 | Harman Becker Automotive Systems GmbH | Automatic timbre, loudness and equalization control |
WO2015010865A1 (en) * | 2013-07-22 | 2015-01-29 | Harman Becker Automotive Systems Gmbh | Automatic timbre control |
JP6821341B2 (ja) * | 2015-07-16 | 2021-01-27 | キヤノン株式会社 | 画像形成装置 |
JP6723848B2 (ja) * | 2015-07-16 | 2020-07-15 | キヤノン株式会社 | 画像形成装置 |
JP6611510B2 (ja) * | 2015-08-05 | 2019-11-27 | キヤノン株式会社 | 画像形成装置の補正方法 |
JP6632393B2 (ja) * | 2016-01-25 | 2020-01-22 | キヤノン株式会社 | 画像形成装置 |
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US4887225A (en) * | 1985-05-24 | 1989-12-12 | Danippon Screen Mfg. Co., Ltd. | Method and device for controlling exposure beams |
JP2575849B2 (ja) * | 1988-11-14 | 1997-01-29 | 富士写真フイルム株式会社 | 画像露光方法およびその装置 |
JPH0816737B2 (ja) | 1990-06-08 | 1996-02-21 | キヤノン株式会社 | 画像処理装置 |
JPH09109458A (ja) * | 1995-08-11 | 1997-04-28 | Hitachi Koki Co Ltd | 電子写真装置 |
JP3562263B2 (ja) * | 1997-10-27 | 2004-09-08 | 富士ゼロックス株式会社 | 多色画像形成装置 |
US7003241B1 (en) * | 1998-07-31 | 2006-02-21 | Ricoh Printing Systems, Ltd. | Image recording device and an image recording system |
JP2000238329A (ja) * | 1999-02-24 | 2000-09-05 | Fuji Xerox Co Ltd | 画像形成装置 |
US7030899B2 (en) * | 2001-07-19 | 2006-04-18 | Konica Corporation | Image-forming apparatus having function of preventing unevenness of image formed on recording medium |
US7206014B2 (en) * | 2001-07-24 | 2007-04-17 | Ricoh Company, Ltd. | Multi-beam pitch adjusting apparatus and image forming apparatus |
JP3600228B2 (ja) * | 2002-03-01 | 2004-12-15 | 株式会社リコー | 光走査装置および画像形成装置 |
JP2006150772A (ja) * | 2004-11-30 | 2006-06-15 | Kyocera Mita Corp | 画像形成装置 |
US7508407B2 (en) * | 2005-05-31 | 2009-03-24 | Seiko Epson Corporation | Light scanning apparatus, image forming apparatus equipped with such light scanning apparatus, and control method or image forming method for such image forming apparatus |
US7548252B2 (en) * | 2006-02-16 | 2009-06-16 | Canon Kabushiki Kaisha | Optical scanning apparatus and color image forming apparatus using the same |
JP4942176B2 (ja) * | 2006-11-01 | 2012-05-30 | キヤノン株式会社 | 画像形成装置及びその制御方法 |
US8149258B2 (en) * | 2007-06-29 | 2012-04-03 | Canon Kabushiki Kaisha | Image forming apparatus and control method |
JP2009039945A (ja) * | 2007-08-08 | 2009-02-26 | Canon Inc | 画像形成装置、その制御方法及び制御プログラム |
JP5369935B2 (ja) * | 2008-09-05 | 2013-12-18 | 株式会社リコー | 画像形成装置 |
-
2009
- 2009-11-27 JP JP2009270102A patent/JP5744391B2/ja active Active
-
2010
- 2010-11-19 EP EP10191807.6A patent/EP2333617B1/en active Active
- 2010-11-19 KR KR1020100115737A patent/KR101401750B1/ko active IP Right Grant
- 2010-11-24 US US12/954,172 patent/US9308743B2/en active Active
- 2010-11-26 CN CN201010568503.0A patent/CN102081229B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
EP2333617A3 (en) | 2016-09-07 |
US9308743B2 (en) | 2016-04-12 |
KR101401750B1 (ko) | 2014-05-30 |
EP2333617A2 (en) | 2011-06-15 |
EP2333617B1 (en) | 2019-07-10 |
CN102081229A (zh) | 2011-06-01 |
KR20110059536A (ko) | 2011-06-02 |
JP2011110846A (ja) | 2011-06-09 |
US20110128344A1 (en) | 2011-06-02 |
CN102081229B (zh) | 2015-06-03 |
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