JPS56164884A - Circuit for driving row of heating resistant bodies for thermal printing - Google Patents

Circuit for driving row of heating resistant bodies for thermal printing

Info

Publication number
JPS56164884A
JPS56164884A JP6928680A JP6928680A JPS56164884A JP S56164884 A JPS56164884 A JP S56164884A JP 6928680 A JP6928680 A JP 6928680A JP 6928680 A JP6928680 A JP 6928680A JP S56164884 A JPS56164884 A JP S56164884A
Authority
JP
Japan
Prior art keywords
period
color
time width
during
heating resistant
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
JP6928680A
Other languages
Japanese (ja)
Inventor
Hideaki Watanabe
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6928680A priority Critical patent/JPS56164884A/en
Publication of JPS56164884A publication Critical patent/JPS56164884A/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)

Abstract

PURPOSE:To reduce nonuniformity in the density of color development even upon high speed driving and make the printing clear by a method wherein an electric power having such a degree of the time width of impression that it will not develop color is impressed to the heating resistant body corresponding to a picture element in which the color is not developed. CONSTITUTION:An electric current is flowed through the heating resistant body H1 during a period wherein both of the output signal DP1 of an OR gate and a block signal BP1 are ''1'', that means the period of an initial forcibly impressing time P1. The driving circuit flows the electric current and heats respective heating resistant bodies during the printing period of one line for at least the period of the time width P1 in spite of the existence or nonexistence of a picture signal. The heat sensitive paper will never develop the color during this time width P1. When the picture signal is ''1'', the electric current will be flowed during a period of a picture signal impressing time P0. The density difference of the color development due to the difference of an electric power impressing frequency may be reduced by the conducting of electricity having the time width P1 and the nonuniformity in the color development upon the high speed driving may be reduced because the nonuniformity becomes small, thereby enabling to obtain the clear printing.
JP6928680A 1980-05-23 1980-05-23 Circuit for driving row of heating resistant bodies for thermal printing Pending JPS56164884A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6928680A JPS56164884A (en) 1980-05-23 1980-05-23 Circuit for driving row of heating resistant bodies for thermal printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6928680A JPS56164884A (en) 1980-05-23 1980-05-23 Circuit for driving row of heating resistant bodies for thermal printing

Publications (1)

Publication Number Publication Date
JPS56164884A true JPS56164884A (en) 1981-12-18

Family

ID=13398206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6928680A Pending JPS56164884A (en) 1980-05-23 1980-05-23 Circuit for driving row of heating resistant bodies for thermal printing

Country Status (1)

Country Link
JP (1) JPS56164884A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201680A (en) * 1982-05-19 1983-11-24 Toshiba Corp Thermal printer
JPS59164160A (en) * 1983-03-09 1984-09-17 Shimadzu Corp Heat sensitive recording system
JPS6273964A (en) * 1985-09-27 1987-04-04 Toshiba Corp System for driving thermal printing head
JPS62257863A (en) * 1986-05-06 1987-11-10 Shinko Electric Co Ltd Thermal head drive circuit
JPH0421464A (en) * 1990-05-16 1992-01-24 Matsushita Electric Ind Co Ltd Heating method in line thermal head

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201680A (en) * 1982-05-19 1983-11-24 Toshiba Corp Thermal printer
JPS6335433B2 (en) * 1982-05-19 1988-07-14 Tokyo Shibaura Electric Co
JPS59164160A (en) * 1983-03-09 1984-09-17 Shimadzu Corp Heat sensitive recording system
JPS6273964A (en) * 1985-09-27 1987-04-04 Toshiba Corp System for driving thermal printing head
JPS62257863A (en) * 1986-05-06 1987-11-10 Shinko Electric Co Ltd Thermal head drive circuit
JPH0439433B2 (en) * 1986-05-06 1992-06-29
JPH0421464A (en) * 1990-05-16 1992-01-24 Matsushita Electric Ind Co Ltd Heating method in line thermal head

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