DE3787646D1 - Schaltung zur erzeugung von zentralimpulsbreitemodulierten signalen und damit ausgeruesteter einschlagsloser drucker. - Google Patents
Schaltung zur erzeugung von zentralimpulsbreitemodulierten signalen und damit ausgeruesteter einschlagsloser drucker.Info
- Publication number
- DE3787646D1 DE3787646D1 DE88900747T DE3787646T DE3787646D1 DE 3787646 D1 DE3787646 D1 DE 3787646D1 DE 88900747 T DE88900747 T DE 88900747T DE 3787646 T DE3787646 T DE 3787646T DE 3787646 D1 DE3787646 D1 DE 3787646D1
- Authority
- DE
- Germany
- Prior art keywords
- impressive
- printers
- circuit
- modulated signals
- impulse width
- 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 - Lifetime
Links
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
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
- H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/000,295 US4750010A (en) | 1987-01-02 | 1987-01-02 | Circuit for generating center pulse width modulated waveforms and non-impact printer using same |
PCT/US1987/003394 WO1988005242A1 (en) | 1987-01-02 | 1987-12-23 | Circuit for generating center pulse-width modulated waveforms and non-impact printer using same |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3787646D1 true DE3787646D1 (de) | 1993-11-04 |
DE3787646T2 DE3787646T2 (de) | 1994-04-28 |
Family
ID=21690861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE88900747T Expired - Lifetime DE3787646T2 (de) | 1987-01-02 | 1987-12-23 | Schaltung zur erzeugung von zentralimpulsbreitemodulierten signalen und damit ausgerüsteter einschlagsloser drucker. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4750010A (de) |
EP (1) | EP0299012B1 (de) |
JP (1) | JPH01501781A (de) |
DE (1) | DE3787646T2 (de) |
WO (1) | WO1988005242A1 (de) |
Families Citing this family (59)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4855760A (en) * | 1987-03-12 | 1989-08-08 | Fuji Photo Film Co., Ltd. | LED array with graduated quantity control |
JP2816147B2 (ja) * | 1987-03-27 | 1998-10-27 | 株式会社日立製作所 | 発光ダイオードアレイ用駆動回路 |
US4967192A (en) * | 1987-04-22 | 1990-10-30 | Hitachi, Ltd. | Light-emitting element array driver circuit |
JP2715411B2 (ja) * | 1987-05-19 | 1998-02-18 | ミノルタ株式会社 | レーザプリンタ |
JPH01103462A (ja) * | 1987-10-19 | 1989-04-20 | Ricoh Co Ltd | 光プリンタの光量補正装置 |
US4837587A (en) * | 1987-12-31 | 1989-06-06 | Eastman Kodak Company | Non-impact printer with nonuniformity correction |
US5488404A (en) * | 1988-03-11 | 1996-01-30 | Siemens Aktiengesellschaft | Optical character generator for an electro photographic printer |
US4913526A (en) * | 1988-09-01 | 1990-04-03 | Eastman Kodak Company | Optical LED printhead with lens locator bar |
US4821051A (en) * | 1988-09-01 | 1989-04-11 | Eastman Kodak Company | Optical printhead having thermal expansion stress relief |
US4875057A (en) * | 1988-09-01 | 1989-10-17 | Eastman Kodak Company | Modular optical printhead for hard copy printers |
US5300960A (en) * | 1988-12-27 | 1994-04-05 | Eastman Kodak Company | Dot printer and method for grey level recording and circuit for use in same |
JP2845933B2 (ja) * | 1989-04-24 | 1999-01-13 | キヤノン株式会社 | 記録ヘッドユニット |
US4980701A (en) * | 1989-07-03 | 1990-12-25 | Eastman Kodak Company | Non-impact printhead using a mask with a dye sensitive to and adjusted by light in a first spectrum to balance the transmission of light in a second spectrum emitted by an LED array |
US5272490A (en) * | 1989-10-31 | 1993-12-21 | Kyocera Corporation | Image forming apparatus with driving circuit elements at ends of an LED array simultaneously transmitting supplied data in opposing directions and simultaneously driving the same block of LEDs |
US5245355A (en) * | 1989-12-18 | 1993-09-14 | Eastman Kodak Company | Method and apparatus for grey level printing with amplitude and pulsewidth modulation |
US4963989A (en) * | 1989-12-18 | 1990-10-16 | Eastman Kodak Company | Method and apparatus for grey level printing |
US5111217A (en) * | 1989-12-18 | 1992-05-05 | Eastman Kodak Company | Dot printer and method for grey level recording |
US5025322A (en) * | 1989-12-18 | 1991-06-18 | Eastman Kodak Company | Method and apparatus for grey level recording using multiple addressability |
EP0461121B1 (de) * | 1990-01-04 | 1997-03-19 | Eastman Kodak Company | Anschlagfreier drucker und grauwertaufzeichnungsverfahren |
JPH03253184A (ja) * | 1990-03-02 | 1991-11-12 | Kowa Co | 画像記録装置 |
US5138337A (en) * | 1990-05-10 | 1992-08-11 | Eastman Kodak Company | Apparatus for grey level printing using a binary architectured printhead |
US5255013A (en) * | 1990-11-07 | 1993-10-19 | Eastman Kodak Company | Multiple address grey level LED printing with binary architectured printhead |
US5166702A (en) * | 1990-06-26 | 1992-11-24 | Eastman Kodak Company | LED printhead with improved current mirror driver and driver chip therefor |
US5253934A (en) * | 1990-06-26 | 1993-10-19 | Eastman Kodak Company | L.E.D. array printer with extra driver channel |
US5126759A (en) * | 1990-06-26 | 1992-06-30 | Eastman Kodak Company | Non-impact printer with token bit control of data and current regulation signals |
US5128692A (en) * | 1991-02-11 | 1992-07-07 | Polaroid Corporation | Symmetric binary weighted exposure method and apparatus employing center pulse width modulation for continuous tone printer |
JPH04369564A (ja) * | 1991-04-02 | 1992-12-22 | Eastman Kodak Japan Kk | 発光装置 |
JP3176083B2 (ja) * | 1991-05-20 | 2001-06-11 | キヤノン株式会社 | 画像処理装置及びその方法 |
JP2866758B2 (ja) | 1991-07-05 | 1999-03-08 | 沖電気工業株式会社 | ノンインパクトプリンタ |
JPH0622107A (ja) * | 1991-10-30 | 1994-01-28 | Ricoh Co Ltd | 階調制御付led駆動回路装置 |
US5657069A (en) * | 1991-12-13 | 1997-08-12 | Eastman Kodak Company | Method and apparatus for grey level printing |
US5233366A (en) * | 1992-05-26 | 1993-08-03 | Xerox Corporation | Half-tone printing with thermal ink jet using random spot distribution in one dimension |
US5389956A (en) * | 1992-08-18 | 1995-02-14 | Xerox Corporation | Techniques for improving droplet uniformity in acoustic ink printing |
JP2979858B2 (ja) * | 1992-09-07 | 1999-11-15 | ブラザー工業株式会社 | 液滴噴射装置 |
US5327524A (en) * | 1992-12-28 | 1994-07-05 | Eastman Kodak Company | Electrophotographic recording with multiple-bit grey level LED printhead with enhanced addressability |
US5461410A (en) * | 1993-03-29 | 1995-10-24 | Texas Instruments Incorporated | Gray scale printing using spatial light modulators |
US5515097A (en) * | 1993-04-05 | 1996-05-07 | Eastman Kodak Company | Apparatus with beam shifting assembly means controlled to increase recording resolution |
EP0629974B1 (de) * | 1993-06-18 | 2000-08-09 | Xeikon Nv | Anschlaglaser Drucker mit Gleichmässigkeitskorrektur |
EP0653878B1 (de) * | 1993-11-12 | 2000-01-12 | Tektronix, Inc. | Geometrie von Halbtonrastermustern zum Drucken von Bildern hoher Qualität |
US5585836A (en) * | 1993-12-27 | 1996-12-17 | Eastman Kodak Company | Electrophotographic image recording apparatus and method with correction for bow in placement of recording elements |
US5604527A (en) * | 1993-12-28 | 1997-02-18 | Eastman Kodak Company | Dot printer and method for grey level recording with different bit-depth dimensions |
JP3268939B2 (ja) * | 1994-05-13 | 2002-03-25 | ブラザー工業株式会社 | インク噴射装置 |
US6034710A (en) * | 1994-11-16 | 2000-03-07 | Konica Corporation | Image forming method for silver halide photographic material |
JPH08197732A (ja) | 1995-01-24 | 1996-08-06 | Canon Inc | 記録ヘッド及び該記録ヘッドを用いた記録装置 |
US5917534A (en) * | 1995-06-29 | 1999-06-29 | Eastman Kodak Company | Light-emitting diode arrays with integrated photodetectors formed as a monolithic device and methods and apparatus for using same |
US5859657A (en) * | 1995-12-28 | 1999-01-12 | Eastman Kodak Company | Led printhead and driver chip for use therewith having boundary scan test architecture |
US5805197A (en) * | 1995-12-28 | 1998-09-08 | Eastman Kodak Company | Driver IC with automatic token direction self-sensing circuitry |
US5926201A (en) * | 1995-12-28 | 1999-07-20 | Eastman Kodak Company | Driver IC configurable for recording in multiple resolutions printhead including the driver IC and method of operating the printhead |
US6382756B1 (en) * | 1996-07-31 | 2002-05-07 | Canon Kabushiki Kaisha | Recording head and recording method |
US6021256A (en) * | 1996-09-03 | 2000-02-01 | Eastman Kodak Company | Resolution enhancement system for digital images |
US5937147A (en) * | 1996-09-03 | 1999-08-10 | Eastman Kodak Company | Printing of enhanced images |
JP3079076B2 (ja) * | 1997-03-19 | 2000-08-21 | 富士通株式会社 | 画像形成装置 |
US5969745A (en) * | 1997-07-12 | 1999-10-19 | Lucent Technologies Inc | Gray shade driver for pixel array |
US6061078A (en) * | 1997-12-23 | 2000-05-09 | Eastman Kodak Company | Non-impact printer apparatus and method of printing with improved control of emitter pulsewidth modulation duration |
US6031559A (en) * | 1997-12-30 | 2000-02-29 | Eastman Kodak Company | Hybrid imaging method and apparatus to reduce contouring and density reversal |
US6375295B1 (en) * | 1999-02-19 | 2002-04-23 | Hewlett-Packard Company | Reduced EMI printhead apparatus and method |
US7016070B2 (en) * | 2001-02-27 | 2006-03-21 | Eastman Kodak Company | Multiple-level printhead using embedded high speed serial data and control link with on-board exposure clock generation |
DE10152389C2 (de) * | 2001-10-24 | 2003-12-24 | Oce Printing Systems Gmbh | Verfahren zur Erzeugung von Ladungsbildern von zu druckenden Bildern auf einem bewegten fotoleitenden Zwischenträger eines elektrofotografischen Druck- oder Kopiergerätes |
FI113113B (fi) * | 2001-11-20 | 2004-02-27 | Nokia Corp | Menetelmä ja laite integroitujen piirien ajan synkronoimiseksi |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872369A (en) * | 1971-08-05 | 1975-03-18 | Gerber Scientific Instr Co | Pulse counting phase modulation method and apparatus for controlling a servo-mechanism |
US3988742A (en) * | 1975-04-28 | 1976-10-26 | Mcdonnell Douglas Corporation | Recorder using light emitting diodes |
US4455562A (en) * | 1981-08-14 | 1984-06-19 | Pitney Bowes Inc. | Control of a light emitting diode array |
JPS6027577B2 (ja) * | 1980-03-12 | 1985-06-29 | 株式会社東芝 | 熱記録装置 |
US4445796A (en) * | 1982-06-16 | 1984-05-01 | International Business Machines Corporation | Print electrode control circuit |
US4455578A (en) * | 1982-08-30 | 1984-06-19 | Eastman Kodak Company | Electronics for arrayed photosources |
JPS59163952A (ja) * | 1983-03-08 | 1984-09-17 | Canon Inc | 画像処理装置 |
US4525729A (en) * | 1983-04-04 | 1985-06-25 | Polaroid Corporation | Parallel LED exposure control system |
NL8403926A (nl) * | 1984-12-24 | 1986-07-16 | Oce Nederland Bv | Werkwijze voor het belichten van een lichtgevoelige laag en belichtingsinrichting. |
-
1987
- 1987-01-02 US US07/000,295 patent/US4750010A/en not_active Expired - Lifetime
- 1987-12-23 JP JP63500967A patent/JPH01501781A/ja active Pending
- 1987-12-23 DE DE88900747T patent/DE3787646T2/de not_active Expired - Lifetime
- 1987-12-23 EP EP88900747A patent/EP0299012B1/de not_active Expired - Lifetime
- 1987-12-23 WO PCT/US1987/003394 patent/WO1988005242A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
EP0299012A1 (de) | 1989-01-18 |
US4750010A (en) | 1988-06-07 |
EP0299012B1 (de) | 1993-09-29 |
WO1988005242A1 (en) | 1988-07-14 |
JPH01501781A (ja) | 1989-06-22 |
DE3787646T2 (de) | 1994-04-28 |
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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: NEXPRESS SOLUTIONS LLC, ROCHESTER, N.Y., US |
|
8328 | Change in the person/name/address of the agent |
Free format text: FEY, H., DIPL.-PHYS., PAT.-ANW., 69115 HEIDELBERG |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: EASTMAN KODAK CO., ROCHESTER, N.Y., US |