SE8903273A - - Google Patents

Info

Publication number
SE8903273A
SE8903273A SE8903273A SE8903273A SE8903273A SE 8903273 A SE8903273 A SE 8903273A SE 8903273 A SE8903273 A SE 8903273A SE 8903273 A SE8903273 A SE 8903273A SE 8903273 A SE8903273 A SE 8903273A
Authority
SE
Sweden
Prior art keywords
cell
dots
dot
respect
size
Prior art date
Application number
SE8903273A
Other languages
English (en)
Other versions
SE462904B (sv
SE8903273D0 (sv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20377061&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE8903273(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed filed Critical
Priority to SE8903273A priority Critical patent/SE462904B/sv
Publication of SE8903273D0 publication Critical patent/SE8903273D0/xx
Publication of SE8903273A publication Critical patent/SE8903273A/xx
Publication of SE462904B publication Critical patent/SE462904B/sv
Priority to PCT/SE1990/000640 priority patent/WO1991004864A1/en
Priority to EP90915213A priority patent/EP0494939B1/de
Priority to AT90915213T priority patent/ATE116909T1/de
Priority to KR1019920700799A priority patent/KR0167360B1/ko
Priority to CA002066041A priority patent/CA2066041A1/en
Priority to JP2514169A priority patent/JPH082670B2/ja
Priority to ES90915213T priority patent/ES2066230T3/es
Priority to DE69016036T priority patent/DE69016036T2/de
Priority to US08/859,541 priority patent/US5801838A/en

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
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • 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
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/41—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing
    • B41J2/415—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit
    • 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
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40043—Circuits exciting or modulating particular heads for reproducing continuous tone value scales using more than one type of modulation, e.g. pulse width modulation and amplitude modulation
    • 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
    • H04N1/4057—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 being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color, Gradation (AREA)
  • Color Image Communication Systems (AREA)
  • Fax Reproducing Arrangements (AREA)
SE8903273A 1989-10-04 1989-10-04 Saett att foerbaettra utskriftsprestanda av graaskalor och faerg foer skrivare SE462904B (sv)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE8903273A SE462904B (sv) 1989-10-04 1989-10-04 Saett att foerbaettra utskriftsprestanda av graaskalor och faerg foer skrivare
DE69016036T DE69016036T2 (de) 1989-10-04 1990-10-04 Verfahren zur qualitätsverbesserung in halbton- und mehrfarbdruck für drucker.
ES90915213T ES2066230T3 (es) 1989-10-04 1990-10-04 Metodo y dispositivo para mejorar la calidad de impresion de escalas de grises y color para impresoras.
JP2514169A JPH082670B2 (ja) 1989-10-04 1990-10-04 プリンター用グレースケールおよびカラーの印刷品質を改善する方法及び装置
CA002066041A CA2066041A1 (en) 1989-10-04 1990-10-04 Method to improve printing quality of grey scales and colour for printers
PCT/SE1990/000640 WO1991004864A1 (en) 1989-10-04 1990-10-04 Method to improve printing quality of grey scales and colour for printers
EP90915213A EP0494939B1 (de) 1989-10-04 1990-10-04 Verfahren zur qualitätsverbesserung in halbton- und mehrfarbdruck für drucker
AT90915213T ATE116909T1 (de) 1989-10-04 1990-10-04 Verfahren zur qualitätsverbesserung in halbton- und mehrfarbdruck für drucker.
KR1019920700799A KR0167360B1 (ko) 1989-10-04 1990-10-04 프린터에서 그레이 스케일 및 컬러의 인쇄질 개선 방법
US08/859,541 US5801838A (en) 1989-10-04 1997-05-20 Method and device to improve print quality of gray scales and color for printers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903273A SE462904B (sv) 1989-10-04 1989-10-04 Saett att foerbaettra utskriftsprestanda av graaskalor och faerg foer skrivare

Publications (3)

Publication Number Publication Date
SE8903273D0 SE8903273D0 (sv) 1989-10-05
SE462904B SE462904B (sv) 1990-09-17
SE8903273A true SE8903273A (de) 1990-09-17

Family

ID=20377061

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8903273A SE462904B (sv) 1989-10-04 1989-10-04 Saett att foerbaettra utskriftsprestanda av graaskalor och faerg foer skrivare

Country Status (9)

Country Link
EP (1) EP0494939B1 (de)
JP (1) JPH082670B2 (de)
KR (1) KR0167360B1 (de)
AT (1) ATE116909T1 (de)
CA (1) CA2066041A1 (de)
DE (1) DE69016036T2 (de)
ES (1) ES2066230T3 (de)
SE (1) SE462904B (de)
WO (1) WO1991004864A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022081A1 (de) * 1990-07-10 1992-01-16 Siemens Ag Verfahren zum drucken eines halbtonbildes
US5170261A (en) * 1990-11-21 1992-12-08 Polaroid Corporation Printing method
EP0642259B1 (de) * 1993-09-03 1999-12-29 Agfa-Gevaert N.V. Verfahren zur Herstellung eines frequenzmodulierten Halbtonrasters
WO2002053387A1 (en) * 2000-12-29 2002-07-11 Array Ab Direct printing apparatus
US6702416B2 (en) 2001-12-05 2004-03-09 Agfa-Gevaert Methods and apparatus for printing grey levels
DE60122178T2 (de) 2001-12-05 2007-08-23 Agfa-Gevaert Verfahren und Gerät zum Drucken von Graustufen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092650A (en) * 1974-06-18 1978-05-30 U.S. Philips Corporation Grouped stylus electrostatic recording head
CA1171130A (en) * 1981-02-18 1984-07-17 Shigemichi Honda Electrostatic printing apparatus
JPS58152265A (ja) * 1982-03-07 1983-09-09 Kotaro Ishitani 画像記録装置
US4672432A (en) * 1983-04-28 1987-06-09 Canon Kabushiki Kaisha Method for recording a color image using dots of colorants of different densities
JPS60184854A (ja) * 1984-03-05 1985-09-20 Matsushita Graphic Commun Syst Inc 静電記録方式
US4736254A (en) * 1984-11-22 1988-04-05 Matsushita Electric Industrial Co., Ltd. Method and apparatus for generating pseudo-halftone dots by comparing gray scale values of an original with dither threshold values stored in cells of a matrix array divided into imaginary matrices of elemental areas each containing one cell
JPS62169181A (ja) * 1986-01-21 1987-07-25 Seiko Epson Corp 光書き込みプリンタ
US4965672A (en) * 1987-05-11 1990-10-23 The Mead Corporation Method and apparatus for halftone imaging
DE3884668T2 (de) * 1987-05-20 1994-05-05 Canon Kk Bilderzeugungsgerät.

Also Published As

Publication number Publication date
SE462904B (sv) 1990-09-17
EP0494939A1 (de) 1992-07-22
ES2066230T3 (es) 1995-03-01
ATE116909T1 (de) 1995-01-15
JPH082670B2 (ja) 1996-01-17
SE8903273D0 (sv) 1989-10-05
EP0494939B1 (de) 1995-01-11
JPH05500930A (ja) 1993-02-25
DE69016036D1 (de) 1995-02-23
KR0167360B1 (ko) 1999-05-01
CA2066041A1 (en) 1991-04-05
DE69016036T2 (de) 1995-05-11
KR920703339A (ko) 1992-12-17
WO1991004864A1 (en) 1991-04-18

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