ES2066230T3 - Metodo y dispositivo para mejorar la calidad de impresion de escalas de grises y color para impresoras. - Google Patents

Metodo y dispositivo para mejorar la calidad de impresion de escalas de grises y color para impresoras.

Info

Publication number
ES2066230T3
ES2066230T3 ES90915213T ES90915213T ES2066230T3 ES 2066230 T3 ES2066230 T3 ES 2066230T3 ES 90915213 T ES90915213 T ES 90915213T ES 90915213 T ES90915213 T ES 90915213T ES 2066230 T3 ES2066230 T3 ES 2066230T3
Authority
ES
Spain
Prior art keywords
printers
improve
gray
cell
dots
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
Application number
ES90915213T
Other languages
English (en)
Inventor
Ove Larson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Array Printers AB
Original Assignee
Array Printers AB
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=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2066230(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Array Printers AB filed Critical Array Printers AB
Application granted granted Critical
Publication of ES2066230T3 publication Critical patent/ES2066230T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)

Abstract

METODO PARA MEJORAR LA CALIDAD DE IMPRESION EN LA REPRODUCCION DE ORIGINALES DE MEDIO TONO POR MEDIO DE IMPRESORAS DEL TIPO, EN EL CUAL HAY UN NUMERO DE PUNTOS (7) QUE SE JUNTAN EN UNA CELDA (PIXEL)(8). UN NUMERO DE -MINIMO DOSMAN UNA CELDA (8) DONDE CADA PUNTO EN LA CELDA ES CONTROLADO INDIVIDUALMENTE CON RESPECTO AL TAMAÑO Y/O AL VALOR DEL COLOR. LOS PUNTOS FORMAN UN PATRON EN CADA CELDA, EL CUAL VARIA RESPECTO AL NUMERO DE PUNTOS, EL TAMAÑO DEL PUNTO Y/O EL VALOR DEL COLOR DEL PUNTO.
ES90915213T 1989-10-04 1990-10-04 Metodo y dispositivo para mejorar la calidad de impresion de escalas de grises y color para impresoras. Expired - Lifetime ES2066230T3 (es)

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 (1)

Publication Number Publication Date
ES2066230T3 true ES2066230T3 (es) 1995-03-01

Family

ID=20377061

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90915213T Expired - Lifetime 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.

Country Status (9)

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

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 (en) * 1993-09-03 1999-12-29 Agfa-Gevaert N.V. Method for making a frequency-modulation halftone screen
WO2002053387A1 (en) * 2000-12-29 2002-07-11 Array Ab Direct printing apparatus
DE60122178T2 (de) 2001-12-05 2007-08-23 Agfa-Gevaert Verfahren und Gerät zum Drucken von Graustufen
US6702416B2 (en) 2001-12-05 2004-03-09 Agfa-Gevaert Methods and apparatus for printing grey levels

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
KR920703339A (ko) 1992-12-17
EP0494939B1 (en) 1995-01-11
SE462904B (sv) 1990-09-17
DE69016036T2 (de) 1995-05-11
DE69016036D1 (de) 1995-02-23
JPH082670B2 (ja) 1996-01-17
SE8903273A (es) 1990-09-17
WO1991004864A1 (en) 1991-04-18
JPH05500930A (ja) 1993-02-25
ATE116909T1 (de) 1995-01-15
SE8903273D0 (sv) 1989-10-05
KR0167360B1 (ko) 1999-05-01
EP0494939A1 (en) 1992-07-22
CA2066041A1 (en) 1991-04-05

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