JPS55164177A - Thermal recorder - Google Patents
Thermal recorderInfo
- Publication number
- JPS55164177A JPS55164177A JP7127779A JP7127779A JPS55164177A JP S55164177 A JPS55164177 A JP S55164177A JP 7127779 A JP7127779 A JP 7127779A JP 7127779 A JP7127779 A JP 7127779A JP S55164177 A JPS55164177 A JP S55164177A
- Authority
- JP
- Japan
- Prior art keywords
- diodes
- elements
- resistance elements
- recording
- recorder
- 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
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
-
- 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
- B41J2/365—Print density control by compensation for variation in temperature
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To make it possible to record characters of small numbers of strokes with good picture quality by causing a specific current to flow through elements unselected at the time of recording thereby to cause the elements to generate heat at a temperature below a coloring temperature, in a thermal recorder using a thermal head having a plurality of heat generating resistance elements. CONSTITUTION:A driving circuit for the thermal head comprises resistance elements R11, R22..., diodes D11, D22..., and grounded emitter NPN transistors Q21, Q22.... Diodes DS1-DSn and a Zener diode DZ are placed in the driving circuit, and a specific current is caused to flow through heat generating resistance elements not selected to cause them to generate heat at a temperature below the coloring temperature. By this procedure, by only adding some circuits such as diodes to the recorder, a width of the impressed pulse becomes short and degradation of a picture quality can be prevented and high speed recording can be performed in carrying out recording of characters having a small number of strokes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7127779A JPS55164177A (en) | 1979-06-08 | 1979-06-08 | Thermal recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7127779A JPS55164177A (en) | 1979-06-08 | 1979-06-08 | Thermal recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55164177A true JPS55164177A (en) | 1980-12-20 |
Family
ID=13456052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7127779A Pending JPS55164177A (en) | 1979-06-08 | 1979-06-08 | Thermal recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55164177A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4432001A (en) * | 1981-01-16 | 1984-02-14 | Fuji Xerox Co., Ltd. | Heat-sensitive recording head driving method |
US4449137A (en) * | 1981-03-24 | 1984-05-15 | Fuji Xerox Co., Ltd. | Driving method for thermal recording head |
US4550659A (en) * | 1981-01-06 | 1985-11-05 | Ye Data Inc. | Hammer driving circuit for a dot system line printer |
US4568817A (en) * | 1983-06-29 | 1986-02-04 | Fuji Xerox Co. Ltd. | Thermal printing method and apparatus |
JPS62257863A (en) * | 1986-05-06 | 1987-11-10 | Shinko Electric Co Ltd | Thermal head drive circuit |
US4828407A (en) * | 1987-05-29 | 1989-05-09 | Sanders Associates, Inc. | Circuit for improving the resolution in electrostatic printers |
US5808632A (en) * | 1990-02-02 | 1998-09-15 | Canon Kabushiki Kaisha | Recording apparatus and method using ink jet recording head |
US6670976B2 (en) * | 2001-08-06 | 2003-12-30 | Riso Kagaku Corporation | Method of and apparatus for controlling thermal head |
US7382388B2 (en) * | 2005-01-14 | 2008-06-03 | Funai Electric Co., Ltd. | Thermal printer |
-
1979
- 1979-06-08 JP JP7127779A patent/JPS55164177A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4550659A (en) * | 1981-01-06 | 1985-11-05 | Ye Data Inc. | Hammer driving circuit for a dot system line printer |
US4432001A (en) * | 1981-01-16 | 1984-02-14 | Fuji Xerox Co., Ltd. | Heat-sensitive recording head driving method |
US4449137A (en) * | 1981-03-24 | 1984-05-15 | Fuji Xerox Co., Ltd. | Driving method for thermal recording head |
US4568817A (en) * | 1983-06-29 | 1986-02-04 | Fuji Xerox Co. Ltd. | Thermal printing method and apparatus |
JPS62257863A (en) * | 1986-05-06 | 1987-11-10 | Shinko Electric Co Ltd | Thermal head drive circuit |
JPH0439433B2 (en) * | 1986-05-06 | 1992-06-29 | ||
US4828407A (en) * | 1987-05-29 | 1989-05-09 | Sanders Associates, Inc. | Circuit for improving the resolution in electrostatic printers |
US5808632A (en) * | 1990-02-02 | 1998-09-15 | Canon Kabushiki Kaisha | Recording apparatus and method using ink jet recording head |
US6670976B2 (en) * | 2001-08-06 | 2003-12-30 | Riso Kagaku Corporation | Method of and apparatus for controlling thermal head |
US7382388B2 (en) * | 2005-01-14 | 2008-06-03 | Funai Electric Co., Ltd. | Thermal printer |
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