GB9301731D0 - Image forming apparatus - Google Patents

Image forming apparatus

Info

Publication number
GB9301731D0
GB9301731D0 GB939301731A GB9301731A GB9301731D0 GB 9301731 D0 GB9301731 D0 GB 9301731D0 GB 939301731 A GB939301731 A GB 939301731A GB 9301731 A GB9301731 A GB 9301731A GB 9301731 D0 GB9301731 D0 GB 9301731D0
Authority
GB
United Kingdom
Prior art keywords
image forming
forming apparatus
image
forming
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.)
Withdrawn
Application number
GB939301731A
Other versions
GB2264024A (en
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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
Priority claimed from JP4323295A external-priority patent/JPH05270058A/en
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB9301731D0 publication Critical patent/GB9301731D0/en
Publication of GB2264024A publication Critical patent/GB2264024A/en
Withdrawn legal-status Critical Current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
    • H04N1/405—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]
    • 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
    • H04N1/23—Reproducing arrangements
    • H04N1/29—Reproducing arrangements involving production of an electrostatic intermediate picture
    • H04N1/295—Circuits or arrangements for the control thereof, e.g. using a programmed control device, according to a measured quantity
    • 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

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)
  • Laser Beam Printer (AREA)
  • Color, Gradation (AREA)
  • Fax Reproducing Arrangements (AREA)
GB9301731A 1992-01-31 1993-01-28 Image forming apparatus Withdrawn GB2264024A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1644492 1992-01-31
JP4323295A JPH05270058A (en) 1992-01-31 1992-12-02 Image forming device

Publications (2)

Publication Number Publication Date
GB9301731D0 true GB9301731D0 (en) 1993-03-17
GB2264024A GB2264024A (en) 1993-08-11

Family

ID=26352796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9301731A Withdrawn GB2264024A (en) 1992-01-31 1993-01-28 Image forming apparatus

Country Status (2)

Country Link
DE (1) DE4302651C2 (en)
GB (1) GB2264024A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69422596T2 (en) * 1993-11-12 2000-10-19 Tektronix, Inc. Geometry of halftone halftone patterns for printing high quality images
US6166821A (en) * 1998-10-02 2000-12-26 Electronics For Imaging, Inc. Self calibrating pulse width modulator for use in electrostatic printing applications

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329311A1 (en) * 1983-08-13 1985-02-28 Ricoh Co., Ltd., Tokio/Tokyo System for activating a thermal printing head
JP3155538B2 (en) * 1989-05-30 2001-04-09 株式会社リコー Laser multi-gradation writing device
DE69130791T2 (en) * 1990-10-03 1999-07-08 Canon K.K., Tokio/Tokyo Imaging device
JP3176083B2 (en) * 1991-05-20 2001-06-11 キヤノン株式会社 Image processing apparatus and method
JPH06311342A (en) * 1993-04-23 1994-11-04 Canon Inc Facsimile equipment

Also Published As

Publication number Publication date
GB2264024A (en) 1993-08-11
DE4302651C2 (en) 1998-09-03
DE4302651A1 (en) 1993-08-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)