JPS5686782A - Driving system of heat sensitive recording body - Google Patents

Driving system of heat sensitive recording body

Info

Publication number
JPS5686782A
JPS5686782A JP16460579A JP16460579A JPS5686782A JP S5686782 A JPS5686782 A JP S5686782A JP 16460579 A JP16460579 A JP 16460579A JP 16460579 A JP16460579 A JP 16460579A JP S5686782 A JPS5686782 A JP S5686782A
Authority
JP
Japan
Prior art keywords
picture element
element number
voltage
exothermic
accordance
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
JP16460579A
Other languages
Japanese (ja)
Inventor
Kiyoshi Sone
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
Priority to JP16460579A priority Critical patent/JPS5686782A/en
Publication of JPS5686782A publication Critical patent/JPS5686782A/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

  • Dot-Matrix Printers And Others (AREA)
  • Electronic Switches (AREA)
  • Facsimile Heads (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To obtain a homogeneous picture density at all times by a method wherein a means to detect the printing picture element number of one line and a means to control a current or an applying voltage of an exothermic element in accordance with a printing picture element number are installed in the recording unit of a thermal plotter. CONSTITUTION:In a thermal plotter which drives a plurality of exothermic elements simultaneously, a means to detect a printing picture element number for one line and a power regulator 24 to control a voltage applied to an exothermic element in accordance with the printing picture element number are installed in a recording unit 1 of the thermal plotter. Consequently, at the output side of the power regualtor 24, when a voltage proportional to the picture element number generated at the terminal of a resistor R is fed back and is entered into an error amplifier 25, the error portion as compared with a reference voltage is amplified and is outputted to a modulation unit 26. By means of an output signal of the modulation unit 26 provided with a pulse width converter, a driver circuit 27 is actuated, and power switching transistors QA, QB are driven, and thereby, controlling the voltage to be applied to an exothermic element in accordance with a picture element number.
JP16460579A 1979-12-18 1979-12-18 Driving system of heat sensitive recording body Pending JPS5686782A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16460579A JPS5686782A (en) 1979-12-18 1979-12-18 Driving system of heat sensitive recording body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16460579A JPS5686782A (en) 1979-12-18 1979-12-18 Driving system of heat sensitive recording body

Publications (1)

Publication Number Publication Date
JPS5686782A true JPS5686782A (en) 1981-07-14

Family

ID=15796348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16460579A Pending JPS5686782A (en) 1979-12-18 1979-12-18 Driving system of heat sensitive recording body

Country Status (1)

Country Link
JP (1) JPS5686782A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58124679A (en) * 1982-01-20 1983-07-25 Fuji Xerox Co Ltd Thermal head driving system
JPS6154959A (en) * 1984-08-27 1986-03-19 Seikosha Co Ltd Driving method of load
JPS61242859A (en) * 1985-04-22 1986-10-29 Chino Corp Thermal head driving device
US5530470A (en) * 1990-10-17 1996-06-25 Canon Kabushiki Kaisha Recording apparatus with controlled thermal transfer energy

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364043A (en) * 1976-11-18 1978-06-08 Matsushita Electric Ind Co Ltd Conducting heat-sensitive printer
JPS5421351A (en) * 1977-07-18 1979-02-17 Mitsubishi Electric Corp Heat sensitive recorder
JPS5421744A (en) * 1977-07-19 1979-02-19 Mitsubishi Electric Corp Record control system of heat sensitive printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364043A (en) * 1976-11-18 1978-06-08 Matsushita Electric Ind Co Ltd Conducting heat-sensitive printer
JPS5421351A (en) * 1977-07-18 1979-02-17 Mitsubishi Electric Corp Heat sensitive recorder
JPS5421744A (en) * 1977-07-19 1979-02-19 Mitsubishi Electric Corp Record control system of heat sensitive printer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58124679A (en) * 1982-01-20 1983-07-25 Fuji Xerox Co Ltd Thermal head driving system
JPS6154959A (en) * 1984-08-27 1986-03-19 Seikosha Co Ltd Driving method of load
JPH0474191B2 (en) * 1984-08-27 1992-11-25
JPS61242859A (en) * 1985-04-22 1986-10-29 Chino Corp Thermal head driving device
US5530470A (en) * 1990-10-17 1996-06-25 Canon Kabushiki Kaisha Recording apparatus with controlled thermal transfer energy

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