CN1324725A - Thermosensitive printing head - Google Patents
Thermosensitive printing head Download PDFInfo
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- CN1324725A CN1324725A CN 00111046 CN00111046A CN1324725A CN 1324725 A CN1324725 A CN 1324725A CN 00111046 CN00111046 CN 00111046 CN 00111046 A CN00111046 A CN 00111046A CN 1324725 A CN1324725 A CN 1324725A
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- common electrode
- printing head
- power supply
- width
- electrode
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Abstract
The present invention relates to a thermal printing head, including ceramic base plate and printed circuit board, etc. and on the ceramic base plate the common electrodes and individual electrodes are set, in which a part of common electrodes is connected with printed circuit board (power common electrode). The width of power common electrode W is greater than 22.5 micrometers and less than or equal to 44 micrometers, and the wire widths and space lengths of local individual electrodes and common electrodes are distributed non-uniformly. The printing head is small in volume, and clear in printing, can be extensively used in the field of printing equipment of facsimile machine, commercial collection machine, medical apparatus, bar code printer and computer terminal etc.
Description
The present invention relates to a kind of print member, is a kind of thermal printing head specifically.
The wiring of existing printhead comprises individual electrode, common electrode, and wherein a part of common electrode links to each other with printed substrate (power supply common electrode), and individual electrode and common electrode are evenly to distribute, and the common electrode width is generally 22.5 μ m.When realizing the miniaturization of printhead, this structure often causes power supply common electrode corresponding region lettering density unevenness one and easily causes this common electrode to blow.
Purpose of the present invention is exactly the deficiency that overcomes existing printhead, provides that a kind of volume is less, the uniform printhead of lettering.
For achieving the above object, a kind of thermal printing head, it comprises ceramic substrate, printed substrate etc., ceramic substrate is provided with common electrode, individual electrode, wherein a part of common electrode links to each other with printed substrate, be called the power supply common electrode, it is characterized in that the width W of power supply common electrode is: 22.5 μ m＜W≤44 μ m, individual electrode and common electrode width and spacing regional area are uneven distribution.
The width W of thermal printing head power supply common electrode is: 25 μ m＜W≤44 μ m, the individual electrode of regional area and common electrode live width uneven distribution, poor Δ w between the live width is 1 μ m＜Δ W＜10 μ m, the individual electrode of regional area and common electrode center distance uneven distribution, pitch difference Δ p is 1 μ m＜Δ P＜10 μ m.
The present invention is owing to strengthened the width of power supply common electrode, and individual electrode and common electrode live width and spacing are uneven distribution, thereby make the miniaturization of printhead become possibility, and lettering is even.
Below in conjunction with accompanying drawing invention is described further.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is printing effect figure when drawing one under 64 heaters for the common electrode that links to each other with printed substrate.
Fig. 3 is Fig. 2 A portion regional enlarged drawing.
Fig. 4 is the design sketch when carrying out the gray scale lettering.
Fig. 5 is Fig. 4 B portion regional enlarged drawing.
Resistance distribution comparison diagram when Fig. 6 is individual electrode and common electrode live width and spacing uneven distribution and even the distribution.
Fig. 7 is printing effect figure of the present invention.
With reference to Fig. 1, the present invention shows and comprises ceramic substrate, printed substrate etc., and ceramic substrate is provided with common electrode 2, individual electrode 1, and wherein a part of common electrode links to each other with printed substrate, be called power supply common electrode 3, the width W of power supply common electrode 3 is 44 μ m.Fig. 2 is when realizing the printhead miniaturization, and the common electrode 3 that will link to each other with printed substrate is by drawing a printing effect figure who changes into when drawing under 64 heaters under 8 heaters.Power supply common electrode 3 is changed into more when drawing one under the multiple spot by drawing one under 8 heaters, and the electric current on the power supply common electrode 3 increases, by formula E
0=I
2The Rt heat power consumption on the power supply common electrode 3 as can be known increases, and causes 3 heatings of power supply common electrode and influences the lettering effect.Fig. 3 is Fig. 2 A portion regional enlarged drawing, a black line is arranged (being A portion) by being clear that among Fig. 3 between two print points, and this place is the heating of power supply common electrode and causes.A portion from Fig. 2 is observed, and this place power supply common electrode generates heat and causes lettering density unevenness one, and black line appears in power supply common electrode corresponding position during actual lettering.And power supply common electrode 3 is changed into when drawing one under 96 heaters by drawing one under 8 heaters, this phenomenon is more outstanding, even causes power supply common electrode 3 to blow and printhead is damaged.The present invention is by adding the width of wide power common electrode 3, reduced the resistance of power supply common electrode 3 self, thereby reduced the heat power consumption of power supply common electrode 3, efficiently solve problem shown in Figure 2, improve the uniformity of lettering, the image quality of drawing a picture is reached normally, seen the normal printing effect figure of Fig. 7.First resistance in 1～21 zone and resistance distribution map when the A among Fig. 6 is individual electrode and common electrode live width and spacing uneven distribution, B are the 1st resistance and the resistance distribution map in individual electrode and common electrode live width and spacing 1～21 zone when evenly distributing.A place 1～21 regional distribution of resistance is even under identical manufacturing condition as seen from Figure 6, and the single-point resistance satisfies specification value R=R ± 10%; And B place 1～21 regional distribution of resistance is very inhomogeneous, and the single-point resistance can not all satisfy specification value R=R ± 10%, and it is low to put resistance individually, also occurs bad phenomenon during lettering, sees Fig. 4.Fig. 5 is the B portion regional enlarged drawing of Fig. 4, and the point that resistance is low is big because of other points of power ratio as can be seen from Figure 5, and caloric value is bigger than other somes during lettering, and causes print point bigger than other points, i.e. B portion among Fig. 5.Can observe from Fig. 4, B portion lettering is darker than the concentration of its elsewhere, promptly causes lettering density unevenness one when actual lettering.The present invention is really by adjusting common electrode 3 individual electrode 1 on every side and the live width and the spacing of common electrode 2 that links to each other with printed substrate, thereby make the resistance of this place's heater reach consistent with other position, the difference of live width and spacing must be controlled in 1 μ m＜Δ W＜10 μ m, 1 μ m＜Δ P＜10 μ m simultaneously, otherwise also can cause the phenomenon that produces lettering density unevenness one because of resistance is inhomogeneous.This structure has solved because of the overstocked low phenomenon of local resistance that causes that connects up, reduced the probability that the resistance reduction takes place when producing simultaneously, realized the homogeneity of lettering concentration, this printhead volume is less, lettering is clear, can be widely used in fields such as facsimile machine, commercial cashing machine, medicine equipment, bar-code printer, terminal PRN device.
Claims (4)
1, a kind of thermal printing head, it comprises ceramic substrate, printed substrate etc., ceramic substrate is provided with common electrode, individual electrode, wherein a part of common electrode links to each other with printed substrate, be the power supply common electrode, the width W that it is characterized in that the power supply common electrode is: 22.5 μ m＜W≤44 μ m, individual electrode and common electrode width and spacing regional area are uneven distribution.
2, thermal printing head according to claim 1 is characterized in that the width W of power supply common electrode is: 25 μ m＜W≤44 μ m.
3, thermal printing head according to claim 1 and 2 is characterized in that the individual electrode and the common electrode live width uneven distribution of regional area, and the poor Δ w between the live width is 1 μ m＜Δ W＜10 μ m.
4, thermal printing head according to claim 3 is characterized in that the individual electrode and the common electrode center distance uneven distribution of regional area, and pitch difference Δ p is 1 μ m＜Δ P＜10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001110462A CN1171734C (en) | 2000-05-18 | 2000-05-18 | Thermosensitive printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001110462A CN1171734C (en) | 2000-05-18 | 2000-05-18 | Thermosensitive printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1324725A true CN1324725A (en) | 2001-12-05 |
| CN1171734C CN1171734C (en) | 2004-10-20 |
Family
ID=4580988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001110462A Expired - Fee Related CN1171734C (en) | 2000-05-18 | 2000-05-18 | Thermosensitive printing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1171734C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233741A (en) * | 2010-04-21 | 2011-11-09 | 阿尔卑斯电气株式会社 | Thermal head |
-
2000
- 2000-05-18 CN CNB001110462A patent/CN1171734C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233741A (en) * | 2010-04-21 | 2011-11-09 | 阿尔卑斯电气株式会社 | Thermal head |
| CN102233741B (en) * | 2010-04-21 | 2014-03-12 | 阿尔卑斯电气株式会社 | Thermal head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1171734C (en) | 2004-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041020 Termination date: 20150518 |
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| EXPY | Termination of patent right or utility model |