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JPS57125068A - Thermal recording device - Google Patents

Thermal recording device

Info

Publication number
JPS57125068A
JPS57125068A JP56011394A JP1139481A JPS57125068A JP S57125068 A JPS57125068 A JP S57125068A JP 56011394 A JP56011394 A JP 56011394A JP 1139481 A JP1139481 A JP 1139481A JP S57125068 A JPS57125068 A JP S57125068A
Authority
JP
Japan
Prior art keywords
dots
group
electric power
resistance
recording
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
JP56011394A
Other languages
Japanese (ja)
Inventor
Hisao Nagao
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP56011394A priority Critical patent/JPS57125068A/en
Publication of JPS57125068A publication Critical patent/JPS57125068A/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

Landscapes

  • Electronic Switches (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To make the depth of the color of recording uniform and raise the quality of recording by forming a plurality of resistance dots that are adjacently located mutually into a group and controlling for each group the electric power applied to each dot according to the dimension of the number of heat generating dots in the group. CONSTITUTION:A pluraity of dots 10a that are close to one another on one plane of a recording head are made into a group 12, and in each group a control means 13 is provided which comprises a resistance 13a for control to control electric power to be applied to dots 10a according to the largeness or smallness of the number of heat generating dots. Then the resistance 13a is put as a common resistance in series to each dot 10a through a transistor 11a in the same group. Constant output electric power is applied to all dots 10a through a chopper circuit from an electric power source circuit, and by this uniform depth of the color of recording can be obtained regardless of the number and concentration of dots that are generating heat.
JP56011394A 1981-01-27 1981-01-27 Thermal recording device Pending JPS57125068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56011394A JPS57125068A (en) 1981-01-27 1981-01-27 Thermal recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56011394A JPS57125068A (en) 1981-01-27 1981-01-27 Thermal recording device

Publications (1)

Publication Number Publication Date
JPS57125068A true JPS57125068A (en) 1982-08-04

Family

ID=11776786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56011394A Pending JPS57125068A (en) 1981-01-27 1981-01-27 Thermal recording device

Country Status (1)

Country Link
JP (1) JPS57125068A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548802A1 (en) * 1983-07-04 1985-01-11 Sony Corp THERMAL PRINTING SYSTEM FOR PRINTING AN INFORMATION IMAGE ON PRINTING PAPER
JPS6078769A (en) * 1983-10-05 1985-05-04 Fujitsu Ltd Thermal recording system
JPH01258964A (en) * 1988-04-08 1989-10-16 Mitsubishi Electric Corp Thermal head driver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548802A1 (en) * 1983-07-04 1985-01-11 Sony Corp THERMAL PRINTING SYSTEM FOR PRINTING AN INFORMATION IMAGE ON PRINTING PAPER
JPS6078769A (en) * 1983-10-05 1985-05-04 Fujitsu Ltd Thermal recording system
JPH01258964A (en) * 1988-04-08 1989-10-16 Mitsubishi Electric Corp Thermal head driver

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