JPS55164177A - Thermal recorder - Google Patents

Thermal recorder

Info

Publication number
JPS55164177A
JPS55164177A JP7127779A JP7127779A JPS55164177A JP S55164177 A JPS55164177 A JP S55164177A JP 7127779 A JP7127779 A JP 7127779A JP 7127779 A JP7127779 A JP 7127779A JP S55164177 A JPS55164177 A JP S55164177A
Authority
JP
Japan
Prior art keywords
diodes
elements
resistance elements
recording
recorder
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
JP7127779A
Other languages
Japanese (ja)
Inventor
Takahiro Yamaguchi
Tetsuo Inoue
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
Original Assignee
Toshiba 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, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7127779A priority Critical patent/JPS55164177A/en
Publication of JPS55164177A publication Critical patent/JPS55164177A/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
    • 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
    • B41J2/365—Print density control by compensation for variation in temperature

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To make it possible to record characters of small numbers of strokes with good picture quality by causing a specific current to flow through elements unselected at the time of recording thereby to cause the elements to generate heat at a temperature below a coloring temperature, in a thermal recorder using a thermal head having a plurality of heat generating resistance elements. CONSTITUTION:A driving circuit for the thermal head comprises resistance elements R11, R22..., diodes D11, D22..., and grounded emitter NPN transistors Q21, Q22.... Diodes DS1-DSn and a Zener diode DZ are placed in the driving circuit, and a specific current is caused to flow through heat generating resistance elements not selected to cause them to generate heat at a temperature below the coloring temperature. By this procedure, by only adding some circuits such as diodes to the recorder, a width of the impressed pulse becomes short and degradation of a picture quality can be prevented and high speed recording can be performed in carrying out recording of characters having a small number of strokes.
JP7127779A 1979-06-08 1979-06-08 Thermal recorder Pending JPS55164177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7127779A JPS55164177A (en) 1979-06-08 1979-06-08 Thermal recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7127779A JPS55164177A (en) 1979-06-08 1979-06-08 Thermal recorder

Publications (1)

Publication Number Publication Date
JPS55164177A true JPS55164177A (en) 1980-12-20

Family

ID=13456052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7127779A Pending JPS55164177A (en) 1979-06-08 1979-06-08 Thermal recorder

Country Status (1)

Country Link
JP (1) JPS55164177A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432001A (en) * 1981-01-16 1984-02-14 Fuji Xerox Co., Ltd. Heat-sensitive recording head driving method
US4449137A (en) * 1981-03-24 1984-05-15 Fuji Xerox Co., Ltd. Driving method for thermal recording head
US4550659A (en) * 1981-01-06 1985-11-05 Ye Data Inc. Hammer driving circuit for a dot system line printer
US4568817A (en) * 1983-06-29 1986-02-04 Fuji Xerox Co. Ltd. Thermal printing method and apparatus
JPS62257863A (en) * 1986-05-06 1987-11-10 Shinko Electric Co Ltd Thermal head drive circuit
US4828407A (en) * 1987-05-29 1989-05-09 Sanders Associates, Inc. Circuit for improving the resolution in electrostatic printers
US5808632A (en) * 1990-02-02 1998-09-15 Canon Kabushiki Kaisha Recording apparatus and method using ink jet recording head
US6670976B2 (en) * 2001-08-06 2003-12-30 Riso Kagaku Corporation Method of and apparatus for controlling thermal head
US7382388B2 (en) * 2005-01-14 2008-06-03 Funai Electric Co., Ltd. Thermal printer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550659A (en) * 1981-01-06 1985-11-05 Ye Data Inc. Hammer driving circuit for a dot system line printer
US4432001A (en) * 1981-01-16 1984-02-14 Fuji Xerox Co., Ltd. Heat-sensitive recording head driving method
US4449137A (en) * 1981-03-24 1984-05-15 Fuji Xerox Co., Ltd. Driving method for thermal recording head
US4568817A (en) * 1983-06-29 1986-02-04 Fuji Xerox Co. Ltd. Thermal printing method and apparatus
JPS62257863A (en) * 1986-05-06 1987-11-10 Shinko Electric Co Ltd Thermal head drive circuit
JPH0439433B2 (en) * 1986-05-06 1992-06-29
US4828407A (en) * 1987-05-29 1989-05-09 Sanders Associates, Inc. Circuit for improving the resolution in electrostatic printers
US5808632A (en) * 1990-02-02 1998-09-15 Canon Kabushiki Kaisha Recording apparatus and method using ink jet recording head
US6670976B2 (en) * 2001-08-06 2003-12-30 Riso Kagaku Corporation Method of and apparatus for controlling thermal head
US7382388B2 (en) * 2005-01-14 2008-06-03 Funai Electric Co., Ltd. Thermal printer

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