JPS5613189A - Driving system for thermal head - Google Patents

Driving system for thermal head

Info

Publication number
JPS5613189A
JPS5613189A JP9001579A JP9001579A JPS5613189A JP S5613189 A JPS5613189 A JP S5613189A JP 9001579 A JP9001579 A JP 9001579A JP 9001579 A JP9001579 A JP 9001579A JP S5613189 A JPS5613189 A JP S5613189A
Authority
JP
Japan
Prior art keywords
signal
fed
head
impressing
time
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.)
Granted
Application number
JP9001579A
Other languages
Japanese (ja)
Other versions
JPS6048339B2 (en
Inventor
Tsuneo Imai
Toshio Oiwa
Akira Nakano
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.)
Toshiba Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
Nippon Telegraph and Telephone Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Nippon Telegraph and Telephone Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP54090015A priority Critical patent/JPS6048339B2/en
Publication of JPS5613189A publication Critical patent/JPS5613189A/en
Publication of JPS6048339B2 publication Critical patent/JPS6048339B2/en
Expired 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

Landscapes

  • Facsimile Heads (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent the unevenness of printing density due to variations in resistance value from head to head and conduct a high-quality recording by controlling the voltage impressing time for each head when driving the thermal heads used in a facsimile or the like. CONSTITUTION:In advance to actual recording, with a preset signal PS given, a current flows in a heating element R11, and the resistance value R of the element R11 is indirectly detected through a resistance 33. This detection signal is fed to a multiplier 35 and a divider 36, and a voltage signal proportional to R<2> is inputted to an analog-to-digital converter 37. Then, with a start signal ST for starting the printing operation given, a counter 38 counts down from the digital signal A (fed from the analog-to-digital converter 37) as the starting number, and feeds a carry- out signal to a flip-flop 39 when it counts down to zero. The start signal ST sets the flip-flop 39, and the time period until the carry-out signal is fed becomes the impressing-time and the impressing-time control signal is fed to an an AND gate AN of a driving unit 20.
JP54090015A 1979-07-16 1979-07-16 Thermal head drive device Expired JPS6048339B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54090015A JPS6048339B2 (en) 1979-07-16 1979-07-16 Thermal head drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54090015A JPS6048339B2 (en) 1979-07-16 1979-07-16 Thermal head drive device

Publications (2)

Publication Number Publication Date
JPS5613189A true JPS5613189A (en) 1981-02-09
JPS6048339B2 JPS6048339B2 (en) 1985-10-26

Family

ID=13986860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54090015A Expired JPS6048339B2 (en) 1979-07-16 1979-07-16 Thermal head drive device

Country Status (1)

Country Link
JP (1) JPS6048339B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827464A (en) * 1981-08-11 1983-02-18 Nippon Telegr & Teleph Corp <Ntt> Controller for heat sensing recording
JPS5990770A (en) * 1982-10-13 1984-05-25 アクチエボラゲット　エレクトロラックス Noncontact igniter
FR2691926A1 (en) * 1992-06-03 1993-12-10 Axiohm Thermal print head with regulation of the energy supply to the heating points.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237054A (en) * 1975-09-18 1977-03-22 Tamura Electric Works Ltd Record density adjustment system for thermal head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237054A (en) * 1975-09-18 1977-03-22 Tamura Electric Works Ltd Record density adjustment system for thermal head

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827464A (en) * 1981-08-11 1983-02-18 Nippon Telegr & Teleph Corp <Ntt> Controller for heat sensing recording
JPS6156654B2 (en) * 1981-08-11 1986-12-03 Nippon Denshin Denwa Kk
JPS5990770A (en) * 1982-10-13 1984-05-25 アクチエボラゲット　エレクトロラックス Noncontact igniter
JPH0416637B2 (en) * 1982-10-13 1992-03-24 Electrolux Ab
FR2691926A1 (en) * 1992-06-03 1993-12-10 Axiohm Thermal print head with regulation of the energy supply to the heating points.

Also Published As

Publication number Publication date
JPS6048339B2 (en) 1985-10-26

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