DE3139321C2 - - Google Patents

Info

Publication number
DE3139321C2
DE3139321C2 DE3139321A DE3139321A DE3139321C2 DE 3139321 C2 DE3139321 C2 DE 3139321C2 DE 3139321 A DE3139321 A DE 3139321A DE 3139321 A DE3139321 A DE 3139321A DE 3139321 C2 DE3139321 C2 DE 3139321C2
Authority
DE
Germany
Prior art keywords
voltage
transistor
circuit
heating resistors
control line
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
Application number
DE3139321A
Other languages
German (de)
English (en)
Other versions
DE3139321A1 (de
Inventor
Shigeru Ohta Tokio/Tokyo Jp Katsuragi
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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of DE3139321A1 publication Critical patent/DE3139321A1/de
Application granted granted Critical
Publication of DE3139321C2 publication Critical patent/DE3139321C2/de
Granted 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
    • H04N1/40025—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)
  • Continuous-Control Power Sources That Use Transistors (AREA)
DE19813139321 1980-10-03 1981-10-02 Druckkopf-ansteuerschaltung fuer einen thermodrucker Granted DE3139321A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55138280A JPS5763280A (en) 1980-10-03 1980-10-03 Driving circuit for heat-sensitive recorder

Publications (2)

Publication Number Publication Date
DE3139321A1 DE3139321A1 (de) 1982-04-15
DE3139321C2 true DE3139321C2 (enExample) 1988-01-28

Family

ID=15218213

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813139321 Granted DE3139321A1 (de) 1980-10-03 1981-10-02 Druckkopf-ansteuerschaltung fuer einen thermodrucker

Country Status (3)

Country Link
US (1) US4404567A (enExample)
JP (1) JPS5763280A (enExample)
DE (1) DE3139321A1 (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434356A (en) * 1982-12-22 1984-02-28 International Business Machines Corporation Regulated current source for thermal printhead
US4435634A (en) * 1982-12-22 1984-03-06 International Business Machines Corporation Thermal printer edge compensation
JPH0775893B2 (ja) * 1984-04-03 1995-08-16 キヤノン株式会社 プリンタ用の記録制御装置
JPS6266953A (ja) * 1985-09-19 1987-03-26 Tokyo Electric Co Ltd サ−マルヘツドの電源回路
US5053790A (en) * 1990-07-02 1991-10-01 Eastman Kodak Company Parasitic resistance compensation for thermal printers
EP0568162A1 (de) * 1992-04-29 1993-11-03 Francotyp-Postalia GmbH Anordnung für eine ETR-Druckkopfansteuerung
DE4214545C2 (de) * 1992-04-29 1996-08-14 Francotyp Postalia Gmbh Anordnung für eine ETR-Druckkopfansteuerung
DE4221275C2 (de) * 1992-06-26 1994-04-21 Francotyp Postalia Gmbh Ansteuerschaltung für eine elektrothermische Druckvorrichtung mit Widerstandsband
US5702188A (en) * 1995-07-18 1997-12-30 Graphtec Corporation Thermal head and head drive circuit therefor
US6283648B1 (en) * 1997-11-28 2001-09-04 Nec Corporation Thermal head control circuit and thermal head control method permitting multicolor printing
US6439678B1 (en) 1999-11-23 2002-08-27 Hewlett-Packard Company Method and apparatus for non-saturated switching for firing energy control in an inkjet printer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874493A (en) * 1972-11-06 1975-04-01 Texas Instruments Inc Electronic page printer
JPS511145A (en) * 1974-06-21 1976-01-07 Copal Co Ltd Hatsushokunodono choseikanonakannetsukirokushikidentaku
JPS52141526A (en) * 1975-10-27 1977-11-25 Seiko Epson Corp Voltage and temperature compensating control of thermal printer
JPS5353223A (en) * 1976-10-25 1978-05-15 Epson Corp Circuit for compensating voltage of thermal printer
JPS55123483A (en) * 1979-03-16 1980-09-22 Hitachi Ltd Thermo-sensitive recorder
JPS56109769A (en) * 1980-02-06 1981-08-31 Ricoh Co Ltd Heat sensitive recorder

Also Published As

Publication number Publication date
US4404567A (en) 1983-09-13
JPS5763280A (en) 1982-04-16
DE3139321A1 (de) 1982-04-15

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8128 New person/name/address of the agent

Representative=s name: SCHWABE, H., DIPL.-ING. SANDMAIR, K., DIPL.-CHEM.

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee