JPS5919159A - Dot image forming device - Google Patents

Dot image forming device

Info

Publication number
JPS5919159A
JPS5919159A JP12854182A JP12854182A JPS5919159A JP S5919159 A JPS5919159 A JP S5919159A JP 12854182 A JP12854182 A JP 12854182A JP 12854182 A JP12854182 A JP 12854182A JP S5919159 A JPS5919159 A JP S5919159A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
formed
area
recorded
head
density region
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.)
Pending
Application number
JP12854182A
Inventor
Hideaki Kawamura
Nobuaki Sakurada
Yuichi Sato
Nobutaka Watanabe
Original Assignee
Canon Inc
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • H04N1/40025Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40031Circuits exciting or modulating particular heads for reproducing continuous tone value scales for a plurality of reproducing elements simultaneously
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • B41J2/21Ink jet for multi-colour printing
    • B41J2/2121Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
    • B41J2/2125Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter by means of nozzle diameter selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024Details of scanning heads ; Means for illuminating the original
    • H04N1/032Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/034Details of scanning heads ; Means for illuminating the original for picture information reproduction using ink, e.g. ink-jet heads
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • H04N1/40087Multi-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

Abstract

PURPOSE:To provide the titled device capable of covering a wide range of density with a simple construction, wherein an area capable of being formed by a recording head and an area capable of being formed by another recording head are made to be contiguous with or partly overlapping with each other. CONSTITUTION:A plurality of recording heads 21-23 differing in the area of dots which can be formed thereby and a controlling means for controlling the area of the dot formed by each of the recording head are provided. A low- density region 31 is recorded by a small-diameter head 21, an intermediate- density region 32 is recorded by an intermediate-diameter head 22, and a high- density region 33 is recorded by a large-diameter head 23. Accordingly, since the area capable of being formed by one of the recording heads and the area capable of being formed by another one of the heads are contiguous with or partly overlapping with each other, a continuous and wide range of gradations can be obtained.
JP12854182A 1982-07-23 1982-07-23 Dot image forming device Pending JPS5919159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12854182A JPS5919159A (en) 1982-07-23 1982-07-23 Dot image forming device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP12854182A JPS5919159A (en) 1982-07-23 1982-07-23 Dot image forming device
DE19833326557 DE3326557C2 (en) 1982-07-23 1983-07-22
US06758851 US4604654A (en) 1982-07-23 1985-07-26 Image forming method and apparatus

Publications (1)

Publication Number Publication Date
JPS5919159A true true JPS5919159A (en) 1984-01-31

Family

ID=14987303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12854182A Pending JPS5919159A (en) 1982-07-23 1982-07-23 Dot image forming device

Country Status (1)

Country Link
JP (1) JPS5919159A (en)

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