JPS57129765A - Thermal recording device - Google Patents
Thermal recording deviceInfo
- Publication number
- JPS57129765A JPS57129765A JP1504381A JP1504381A JPS57129765A JP S57129765 A JPS57129765 A JP S57129765A JP 1504381 A JP1504381 A JP 1504381A JP 1504381 A JP1504381 A JP 1504381A JP S57129765 A JPS57129765 A JP S57129765A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- heating resistor
- generated
- signal
- fluctuate
- 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.)
- Granted
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 correct the ununiformity of a recorded image by detecting a voltage impressed on a heating resistor and by changing the output voltage of a power source according to the detected voltage. CONSTITUTION:Pulse signals 51 and 52 generated by a clock signal which is generated in a clock generating circuit are supplied to common terminal switching elements Q1 and Q2 in a source driver to fluctuate thereby the number of the heating resistor 1 electrified in accordance with a image signal 41 supplied to a sync driver 4 and further to fluctuate voltage appearing the output ends 31 and 32 of the elements Q1 and Q2. This voltage is sampled to a control part 24 by a sampling clock 53 and the control part 24 supplies a high-frequency inverter 22 with a control signal 25 having the voltage variation inversely proportional to the afore-said voltage. Meanwhile, the primary-side rectifying- smoothing part 21 of a power source part 2 converts AC voltage of 100V to DC voltage, and the inverter 22, converting this to a prescribed high frequency, changes a crest value in accordance with the voltage level of the signal 25, increases the output voltage of the secondary-side rectifying-smoothing part 23 with the decrease of the voltage generated at the output ends 31 and 32, and thus compensates the fall of a heat value of the heating resistor 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504381A JPS57129765A (en) | 1981-02-05 | 1981-02-05 | Thermal recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504381A JPS57129765A (en) | 1981-02-05 | 1981-02-05 | Thermal recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57129765A true JPS57129765A (en) | 1982-08-11 |
| JPS6351103B2 JPS6351103B2 (en) | 1988-10-12 |
Family
ID=11877803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1504381A Granted JPS57129765A (en) | 1981-02-05 | 1981-02-05 | Thermal recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57129765A (en) |
-
1981
- 1981-02-05 JP JP1504381A patent/JPS57129765A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6351103B2 (en) | 1988-10-12 |
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