JPS56169077A - Heat generating recording device - Google Patents

Heat generating recording device

Info

Publication number
JPS56169077A
JPS56169077A JP7401080A JP7401080A JPS56169077A JP S56169077 A JPS56169077 A JP S56169077A JP 7401080 A JP7401080 A JP 7401080A JP 7401080 A JP7401080 A JP 7401080A JP S56169077 A JPS56169077 A JP S56169077A
Authority
JP
Japan
Prior art keywords
resistor
heat generating
recording
voltage
impedance
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
JP7401080A
Other languages
Japanese (ja)
Inventor
Kunio Yasumi
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 JP7401080A priority Critical patent/JPS56169077A/en
Publication of JPS56169077A publication Critical patent/JPS56169077A/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

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To drive a recording device by low power, to lengthen the life of a heat- sensitive head, and to economize power consumption by using one section of a current controlling means as a switching circuit limiting conduction currents at a value less than the for recording and conducting all picture element current value. CONSTITUTION:Voltage drop corresponding to the number of the recording and energizing of the heat generating resistors R1-R216 of the first group appears at a resistor RL1. The voltage of the resistor RL1 is applied to between an emitter and a base of a transistor QS2 as base voltage in the forward direction, the impedance of the QS2 lowers being in inverse proportion to the voltage of the resistor RL1, and the impedance of a transistor QS1 changes being in inverse proportion to the impedance of the QS2, i.e., corresponding to the voltage of the resistor RL1. That is, the impedance of the transistor QS1 increases in response to the number of the heat generating resistors being recorded and energized. Thus, currents flowing through the transistor QS1 are a fixed value or less, less than the product of the current value of one heat generating resistor in normal color formation recording and the number of recording and energizing, during the power conduction of the heat generating resistors.
JP7401080A 1980-06-02 1980-06-02 Heat generating recording device Pending JPS56169077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7401080A JPS56169077A (en) 1980-06-02 1980-06-02 Heat generating recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7401080A JPS56169077A (en) 1980-06-02 1980-06-02 Heat generating recording device

Publications (1)

Publication Number Publication Date
JPS56169077A true JPS56169077A (en) 1981-12-25

Family

ID=13534681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7401080A Pending JPS56169077A (en) 1980-06-02 1980-06-02 Heat generating recording device

Country Status (1)

Country Link
JP (1) JPS56169077A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57107869A (en) * 1980-12-26 1982-07-05 Toshiba Corp Thermal head
JPS59166949U (en) * 1983-04-26 1984-11-08 株式会社田村電機製作所 thermal head
JPS62119083A (en) * 1985-11-20 1987-05-30 Fujitsu Ltd Thermal printer
JPH0330960A (en) * 1989-06-27 1991-02-08 Seiko Instr Inc Thermal head control circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57107869A (en) * 1980-12-26 1982-07-05 Toshiba Corp Thermal head
JPH044156B2 (en) * 1980-12-26 1992-01-27
JPS59166949U (en) * 1983-04-26 1984-11-08 株式会社田村電機製作所 thermal head
JPH028771Y2 (en) * 1983-04-26 1990-03-02
JPS62119083A (en) * 1985-11-20 1987-05-30 Fujitsu Ltd Thermal printer
JPH0434949B2 (en) * 1985-11-20 1992-06-09 Fujitsu Ltd
JPH0330960A (en) * 1989-06-27 1991-02-08 Seiko Instr Inc Thermal head control circuit

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