JPS5798372A - Device for automatically setting voltage applied to head of thermal printer - Google Patents

Device for automatically setting voltage applied to head of thermal printer

Info

Publication number
JPS5798372A
JPS5798372A JP17432080A JP17432080A JPS5798372A JP S5798372 A JPS5798372 A JP S5798372A JP 17432080 A JP17432080 A JP 17432080A JP 17432080 A JP17432080 A JP 17432080A JP S5798372 A JPS5798372 A JP S5798372A
Authority
JP
Japan
Prior art keywords
head
printing
voltage
voltage applied
heads
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
JP17432080A
Other languages
Japanese (ja)
Inventor
Hitoshi Mori
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17432080A priority Critical patent/JPS5798372A/en
Publication of JPS5798372A publication Critical patent/JPS5798372A/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

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To permit automatic setting of voltage applied to a head with respect to variations in resistance of the head by a device wherein one extra printing head is provided in addition to a number of printing heads and the extra printing head is used as a resistor for setting voltage applied to head in a stabilized power supply circuit. CONSTITUTION:A number of printing heads (heating elements) 32-34 adapted to perform actual printing are connected to corresponding transistors 29-31 for driving heads, the printing heads serving as collector resistors. In addition to these printing heads 32-34, one extra printing head 35 is provided which had one terminal directly grounded and the other terminal connected to a fixed resistor 37 for setting voltage applied to head and a stabilized power supply 39 for supplying head voltage. Voltage of output 36 from the power supply 39 is divided in accordance with a ratio is resistance of the fixed resistor 37 and the printing head 35. Thus, voltage of a control signal 38 for setting head voltage is increased and decreased in proportion to variations in resistance of the printing head 35.
JP17432080A 1980-12-10 1980-12-10 Device for automatically setting voltage applied to head of thermal printer Pending JPS5798372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17432080A JPS5798372A (en) 1980-12-10 1980-12-10 Device for automatically setting voltage applied to head of thermal printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17432080A JPS5798372A (en) 1980-12-10 1980-12-10 Device for automatically setting voltage applied to head of thermal printer

Publications (1)

Publication Number Publication Date
JPS5798372A true JPS5798372A (en) 1982-06-18

Family

ID=15976577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17432080A Pending JPS5798372A (en) 1980-12-10 1980-12-10 Device for automatically setting voltage applied to head of thermal printer

Country Status (1)

Country Link
JP (1) JPS5798372A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63189256A (en) * 1987-01-31 1988-08-04 Tokyo Electric Co Ltd Automatic voltage controller for thermal head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63189256A (en) * 1987-01-31 1988-08-04 Tokyo Electric Co Ltd Automatic voltage controller for thermal head

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