DE69628539T2 - Einstellung der Punktgrösse für Laserdrucker - Google Patents
Einstellung der Punktgrösse für Laserdrucker Download PDFInfo
- Publication number
- DE69628539T2 DE69628539T2 DE69628539T DE69628539T DE69628539T2 DE 69628539 T2 DE69628539 T2 DE 69628539T2 DE 69628539 T DE69628539 T DE 69628539T DE 69628539 T DE69628539 T DE 69628539T DE 69628539 T2 DE69628539 T2 DE 69628539T2
- Authority
- DE
- Germany
- Prior art keywords
- image
- pulse width
- width modulation
- circuit
- bit
- 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.)
- Expired - Fee Related
Links
- 239000003086 colorant Substances 0.000 claims description 43
- 230000015654 memory Effects 0.000 claims description 31
- 230000004044 response Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000003384 imaging method Methods 0.000 claims description 14
- 108091008695 photoreceptors Proteins 0.000 claims description 8
- 238000011161 development Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims description 4
- 206010034972 Photosensitivity reaction Diseases 0.000 claims description 2
- 230000036211 photosensitivity Effects 0.000 claims description 2
- 206010034960 Photophobia Diseases 0.000 claims 1
- 208000013469 light sensitivity Diseases 0.000 claims 1
- 230000004048 modification Effects 0.000 description 14
- 238000012986 modification Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000009499 grossing Methods 0.000 description 5
- 239000000049 pigment Substances 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- 238000001429 visible spectrum Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- H04N1/40—Picture signal circuits
- H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
- H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Laser Beam Printer (AREA)
- Color, Gradation (AREA)
- Dot-Matrix Printers And Others (AREA)
- Facsimile Scanning Arrangements (AREA)
- Fax Reproducing Arrangements (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US611890 | 1996-03-06 | ||
| US08/611,890 US5793406A (en) | 1996-03-06 | 1996-03-06 | Adjustment of dot size for laser imagers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE69628539D1 DE69628539D1 (de) | 2003-07-10 |
| DE69628539T2 true DE69628539T2 (de) | 2004-04-29 |
Family
ID=24450792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE69628539T Expired - Fee Related DE69628539T2 (de) | 1996-03-06 | 1996-10-17 | Einstellung der Punktgrösse für Laserdrucker |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5793406A (enExample) |
| EP (1) | EP0794656B1 (enExample) |
| JP (1) | JPH09331448A (enExample) |
| DE (1) | DE69628539T2 (enExample) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0821515B1 (en) * | 1996-07-26 | 2003-05-14 | Texas Instruments Incorporated | A digital resolution translator |
| US6501565B1 (en) * | 1998-07-07 | 2002-12-31 | Electronics For Imaging, Inc. | Method and apparatus for smoothing text outlines |
| JP3760969B2 (ja) | 1998-08-07 | 2006-03-29 | セイコーエプソン株式会社 | 画像形成装置及び方法 |
| JP3844180B2 (ja) | 1999-09-27 | 2006-11-08 | リコープリンティングシステムズ株式会社 | 分割分散ｐｗｍ階調処理装置及びこれを備えたレーザプリンタ |
| US6476844B1 (en) | 2000-10-12 | 2002-11-05 | Lexmark International, Inc. | Method and apparatus for electrophotographic laser video modulation and decode for spot fidelity |
| US6553190B1 (en) * | 2001-10-16 | 2003-04-22 | Hewlett-Packard Development Co., L.P. | Correction of pulse width accumulator based on the temperature and relative humidity |
| US6641244B2 (en) * | 2001-11-28 | 2003-11-04 | Hewlett-Packard Development Company, Lp. | Method and apparatus for modifying a printing process in response to environmental conditions received via a network |
| JP4605692B2 (ja) * | 2004-03-19 | 2011-01-05 | 株式会社リコー | 半導体レーザ変調駆動装置及び画像形成装置 |
| US7480066B2 (en) * | 2004-07-29 | 2009-01-20 | Marvell International Technology Ltd. | Modulated video waveform generator |
| US7408567B2 (en) * | 2005-03-29 | 2008-08-05 | Kabushiki Kaisha Toshiba | Light beam scanning apparatus and image forming apparatus |
| US11113999B2 (en) * | 2018-09-03 | 2021-09-07 | Chongqing Hkc Optoelectronics Technology Co., Ltd. | Data processing method, display device, and computer-readable storage medium |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152373A (en) * | 1980-04-24 | 1981-11-25 | Fuji Photo Film Co Ltd | Laser recording device |
| US4847641A (en) | 1988-08-16 | 1989-07-11 | Hewlett-Packard Company | Piece-wise print image enhancement for dot matrix printers |
| US5313308A (en) * | 1989-08-31 | 1994-05-17 | Canon Kabushiki Kaisha | Image forming apparatus which changes its tone reproducing property in accordance with ambient conditions |
| JPH04316276A (ja) * | 1991-04-16 | 1992-11-06 | Ricoh Co Ltd | 画像形成装置 |
| US5671003A (en) * | 1991-11-04 | 1997-09-23 | Eastman Kodak Company | Hybrid digital image printer with halftone gray scale capability |
| US5359431A (en) * | 1992-06-05 | 1994-10-25 | Eastman Kodak Company | Classification to change exposure within a cell of different pixels |
| JP3274200B2 (ja) * | 1992-12-28 | 2002-04-15 | キヤノン株式会社 | 画像形成方法及び装置 |
| EP0612181A1 (de) * | 1993-02-19 | 1994-08-24 | Linotype-Hell Ag | Verfahren und Einrichtung zur Umwandlung von Halbtonwerten in Binärwerte |
| US5666470A (en) * | 1995-06-29 | 1997-09-09 | Xerox Corporation | Method and apparatus for appearance tuning of bitmap images |
-
1996
- 1996-03-06 US US08/611,890 patent/US5793406A/en not_active Expired - Lifetime
- 1996-10-17 EP EP96116704A patent/EP0794656B1/en not_active Expired - Lifetime
- 1996-10-17 DE DE69628539T patent/DE69628539T2/de not_active Expired - Fee Related
-
1997
- 1997-02-27 JP JP9043110A patent/JPH09331448A/ja not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09331448A (ja) | 1997-12-22 |
| DE69628539D1 (de) | 2003-07-10 |
| EP0794656B1 (en) | 2003-06-04 |
| EP0794656A2 (en) | 1997-09-10 |
| US5793406A (en) | 1998-08-11 |
| EP0794656A3 (en) | 1999-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE |
|
| 8339 | Ceased/non-payment of the annual fee |