JPS5692080A - Forming method for tonal picture in heat-sensitive printer - Google Patents

Forming method for tonal picture in heat-sensitive printer

Info

Publication number
JPS5692080A
JPS5692080A JP17191379A JP17191379A JPS5692080A JP S5692080 A JPS5692080 A JP S5692080A JP 17191379 A JP17191379 A JP 17191379A JP 17191379 A JP17191379 A JP 17191379A JP S5692080 A JPS5692080 A JP S5692080A
Authority
JP
Japan
Prior art keywords
pulse
picture
width
modulated
signal
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
JP17191379A
Other languages
Japanese (ja)
Inventor
Osamu Yoshizaki
Masayuki Inouchi
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP17191379A priority Critical patent/JPS5692080A/en
Priority to US06/220,805 priority patent/US4374385A/en
Publication of JPS5692080A publication Critical patent/JPS5692080A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/1911—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • H04N1/1912—Scanning main scanning lines which are spaced apart from one another in the sub-scanning direction
    • 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
    • H04N1/40031—Circuits exciting or modulating particular heads for reproducing continuous tone value scales for a plurality of reproducing elements simultaneously

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent a picture from changing in density with the passage of time, by a method wherein a pulse signal, having a width being proportioned to a picture density applied to a heater, is modulated into a signal consisting of a plurality of pulses having a width which is sufficiently narrower than that of aforesaid pulse. CONSTITUTION:In a forming method for a tonal picture in which a thermal head C having a plurality of heaters B on a substrate A is used, a picture signal alpha, which is outputted to the heaters B, is sent as a pulse current having a pulse width L being proportioned to a picture element density, but is modulated for applying. That is, the picture signal alpha is expanded by a given ratio by means of a pulse width expander to produce a pulse current beta. Then, said pulse current beta is inputted to the one terminal of an AND gate 10 always inputting a pulse, which has a width being enoughly narrower than that of the pulse of the picture element signal alpha, through the other terminal thereof from a pulse generator 11, and is inputted to a heater B of a thermal head C as a modulated picture element signal alpha (consisting of a plurality of pulse groups, and besides, the sum of widths of the pulse groups is equal to L).
JP17191379A 1979-12-27 1979-12-27 Forming method for tonal picture in heat-sensitive printer Pending JPS5692080A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP17191379A JPS5692080A (en) 1979-12-27 1979-12-27 Forming method for tonal picture in heat-sensitive printer
US06/220,805 US4374385A (en) 1979-12-27 1980-12-29 Method of forming gradated images by thermal printer and thermal head for thermal printers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17191379A JPS5692080A (en) 1979-12-27 1979-12-27 Forming method for tonal picture in heat-sensitive printer

Publications (1)

Publication Number Publication Date
JPS5692080A true JPS5692080A (en) 1981-07-25

Family

ID=15932148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17191379A Pending JPS5692080A (en) 1979-12-27 1979-12-27 Forming method for tonal picture in heat-sensitive printer

Country Status (1)

Country Link
JP (1) JPS5692080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6078266A (en) * 1983-10-05 1985-05-02 三洋電機株式会社 Refrigerator
US4697938A (en) * 1984-04-17 1987-10-06 Tokyo Electric Co., Ltd. Multi-tint thermal printing apparatus control system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984451A (en) * 1972-12-19 1974-08-14
JPS54655A (en) * 1977-06-03 1979-01-06 Kyowa Electronic Instruments Connecting terminal for distorsion gauge
JPS556948A (en) * 1978-06-30 1980-01-18 Fujitsu Ltd Test method for subscriber circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984451A (en) * 1972-12-19 1974-08-14
JPS54655A (en) * 1977-06-03 1979-01-06 Kyowa Electronic Instruments Connecting terminal for distorsion gauge
JPS556948A (en) * 1978-06-30 1980-01-18 Fujitsu Ltd Test method for subscriber circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6078266A (en) * 1983-10-05 1985-05-02 三洋電機株式会社 Refrigerator
JPS6316022B2 (en) * 1983-10-05 1988-04-07 Sanyo Electric Co
US4697938A (en) * 1984-04-17 1987-10-06 Tokyo Electric Co., Ltd. Multi-tint thermal printing apparatus control system

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