CN110154545B - Error correction method for thermal transfer printer and thermal transfer printer - Google Patents

Error correction method for thermal transfer printer and thermal transfer printer Download PDF

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Publication number
CN110154545B
CN110154545B CN201910372491.5A CN201910372491A CN110154545B CN 110154545 B CN110154545 B CN 110154545B CN 201910372491 A CN201910372491 A CN 201910372491A CN 110154545 B CN110154545 B CN 110154545B
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China
Prior art keywords
error
distance
preset
determining
heating
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CN201910372491.5A
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Chinese (zh)
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CN110154545A (en
Inventor
李留祥
乔明发
唐国初
倪继超
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湖南鼎一致远科技发展有限公司
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Priority to CN201910372491.5A priority Critical patent/CN110154545B/en
Publication of CN110154545A publication Critical patent/CN110154545A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315Typewriters 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns

Abstract

The invention provides an error correction method of a thermal transfer printer and the thermal transfer printer. The method comprises the following steps: acquiring a first distance between a first preset position and a first reference position of the image-text information, and acquiring a second distance between a second preset position and a second reference position of the electronic document; determining a position error based on the first distance and the second distance, the position error including a length position error in a moving direction of the printing medium; determining a first time compensation value according to the length position error and the moving speed of the printing medium; acquiring the current heating moment of a first heating matrix of the printing head corresponding to a first preset position; determining the actual heating moment according to the current heating moment and the first time compensation value; and controlling the first heating matrix to heat at the actual heating moment, and controlling the ratio between the position error and the second distance within a preset range. Therefore, the ratio between the position error of the image-text information and the second distance is controlled within a preset range, and the printing precision of the printer is improved.

Description

Error correction method for thermal transfer printer and thermal transfer printer

Technical Field

The present invention relates generally to the field of thermal transfer printing, and more particularly to an error correction method for a thermal transfer printer and a thermal transfer printer.

Background

At present, thermal transfer printers have been widely used in various industries. Nowadays, a thermal transfer printer is affected by the precision of the equipment, and the deviation between the position of a part of printed graphic and text information (including patterns and/or characters) and the position of the part of graphic and text information in an electronic document is large, so that the printing quality is poor.

Therefore, it is desirable to provide an error correction method of a thermal transfer printer and a thermal transfer printer to at least partially solve the above-mentioned problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above technical problem, according to an aspect of the present invention, there is provided an error correction method of a thermal transfer printer, the method including:

acquiring a first distance between a first preset position and a first reference position of image-text information printed by a printer, and acquiring a second distance between a second preset position and a second reference position of an electronic document corresponding to the image-text information, wherein the first preset position corresponds to the second preset position, and the first reference position corresponds to the second reference position;

determining a position error based on the first distance and the second distance, the position error including a length position error in a moving direction of the printing medium;

determining a first time compensation value according to the length position error and the moving speed of the printing medium;

acquiring the current heating moment of a first heating matrix of the printing head corresponding to a first preset position;

determining the actual heating moment according to the current heating moment and the first time compensation value;

and controlling the first heating substrate to heat at the actual heating moment so as to control the ratio between the position error and the second distance within a preset range.

According to the error correction method of the thermal transfer printer, the current heating moment of the first heating base body is compensated through the first time compensation value, and then the pattern printed by the first heating base body is moved from the first preset position to the second preset position in the moving direction of the printing medium, so that the ratio of the position error of the pattern printed by the first heating base body to the second distance is controlled within the preset range, and the printing accuracy of the printer is improved.

Optionally, the position error is a difference between the first distance and the second distance, and the preset range is less than or equal to 1 ‰.

Optionally, the actual heating time is a sum of the current heating time and the first time compensation value.

Optionally, the first preset position is a boundary of different colors in the image-text information.

Optionally, the method further comprises:

and observing the pattern of the image-text information and the pattern of the electronic document through a high magnification magnifier to determine the position error.

Optionally, the method further comprises:

and acquiring the pattern of the image-text information through a camera or a camera, and comparing the pattern of the image-text information with the pattern of the electronic document through image comparison software to determine the position error.

Optionally, the position error further includes a width position error in a width direction of the printing medium;

correspondingly, the controlling the first heating substrate to generate heat at the actual heating moment comprises the following steps:

the second heat generating substrate, whose distance from the first heat generating substrate in the width direction of the printing medium is controlled to be a width position error, generates heat at an actual heat generating timing.

Optionally, after determining the position error according to the first distance and the second distance, before determining the actual heat generation time according to the current heat generation time and the first time compensation value, the method includes:

determining a second time compensation value according to the length position error and the rotating speed of a platen roller arranged below the printing head;

correspondingly, determining the actual heating time according to the current heating time and the first time compensation value comprises:

and determining the actual heating moment according to the current heating moment, the first time compensation value and the second time compensation value.

Optionally, the actual heating time is the sum of the current heating time, the first time compensation value, and the second time compensation value.

The invention also provides a thermal transfer printer, which is controlled by the method.

According to the thermal transfer printer, the thermal transfer printer is controlled by the method, the current heating time of the first heating base body is compensated through the first time compensation value, the pattern printed by the first heating base body is moved from the first preset position to the second preset position in the moving direction of the printing medium, the ratio of the position error of the pattern printed by the first heating base body to the second distance is controlled within the preset range, and the printing precision of the printer is improved.

Drawings

In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.

Fig. 1 is a schematic flow diagram according to a first preferred embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

The printing head of the thermal transfer printer is provided with a plurality of heating basal bodies. At least one row and at least two columns of heat generating substrates are arranged in an array on the print head (the extending direction of each row is consistent with the width direction of the printing medium, and the extending direction of each column is consistent with the moving direction of the printing medium). A platen roller is disposed below the print head. After the print head presses the ink ribbon and a print medium (e.g., printing paper) against the platen roller, the heat-generating substrate of the print head generates heat to print the color on the ink ribbon onto the print medium. The controller may control all the heat generating substrates to operate according to a pattern of the electronic document to print the pattern on the printing medium.

Embodiment mode 1

The invention provides an error correction method of a thermal transfer printer. The error correction method can control the position error between a first preset position of a pattern of image-text information (the pattern or characters printed on a printing medium by a printer) and a second preset position of the pattern of an electronic document (the printer is used for printing the electronic document of the image-text information, and the pattern of the electronic document is the same as the pattern of the image-text information) within a preset range. The first predetermined position may be any position in the pattern of the teletext information. The second preset position may be any position in the pattern of the electronic document. Thus, the present embodiment can compensate for errors in the entire contents of the pattern. It should be noted that the position error may be a positive value or a negative value.

In the present embodiment, as shown in fig. 1, the error correction method includes:

step S1, obtaining a first distance between a first preset position and a first reference position of the image-text information printed by the printer, and obtaining a second distance between a second preset position and a second reference position of the electronic document corresponding to the image-text information, where the first preset position corresponds to the second preset position, and the first reference position corresponds to the second reference position.

Step S2, determining a position error based on the first distance and the second distance, the position error including a length position error in a moving direction of the printing medium.

In this embodiment, a test print is performed on an electronic document, and a second preset position and a second reference position are determined in a pattern of the electronic document. For example, the boundary of different colors of the pattern of the electronic document is selected as the second preset position. The center point of the pattern of the electronic document or the leftmost point of the pattern of the electronic document is selected as the second reference position. The setting can be made as required by those skilled in the art. A second distance between the second preset position and the second reference position is determined.

The printer is controlled to print the electronic document at a print ratio of 1: 1. And determining a first preset position corresponding to the second preset position on the pattern of the image-text information. And determining a first reference position corresponding to the second reference position. A first distance between the first preset position and the first reference position is determined.

After determining the first distance and the second distance, a difference between the first distance and the second distance (a position error between the first preset position and the second preset position) is determined. The positional error may include a length positional error in a first direction (a length direction of the printing medium, and the present embodiment is described taking a case where the printer moves in the length direction of the printing medium as an example), and a width positional error in a second direction (a width direction of the printing medium). The length position error may be a length of a projection of the difference between the first distance and the second distance in the first direction. The width position error may be a length of a projection of a difference between the first distance and the second distance in the second direction.

Preferably, the pattern of the graphic information and the pattern of the electronic document can be observed through a high magnification magnifier to determine the above position error. Therefore, the position error is conveniently acquired.

Preferably, an electronic pattern of the teletext information may also be acquired using a high definition camera or a high definition video camera. Then, the electronic pattern and the pattern of the electronic document are compared by comparison software (for example, measurement tools in conventional graphic processing software such as self-development software or PS arranged in a computer matched with a printer) (when the electronic pattern and the pattern of the electronic document are compared, the outline of the electronic pattern and the outline of the pattern of the electronic document are approximately overlapped, for example, the overlap ratio of the outline of the electronic pattern and the outline of the pattern of the electronic document is more than 99.9%), and the position error is determined. Thus, the accuracy of acquiring the position error is high.

In the present embodiment, after step S2, the error correction method further includes:

step S3, determining a first time compensation value according to the length position error and the moving speed of the printing medium.

In the present embodiment, the rotational speed of the printing medium may be determined in accordance with the diameter of the paper-feeding roller provided in the printer and the rotational speed thereof. Or a speed sensor is provided to acquire the moving speed of the printing medium. The setting can be made as required by those skilled in the art. A ratio (first time compensation value) between the length position error and the moving speed of the printing medium is determined.

After step S3, the error correction method further includes:

and step S4, acquiring the current heating time of the first heating substrate corresponding to the first preset position of the printing head.

And determining a first heating substrate for printing the pattern of the first preset position according to preset printing software in all the heating substrates of the printing head. And determining the moment (current heating moment) when the first heating substrate prints the pattern at the first preset position according to the printing software.

And step S5, determining the actual heating time according to the current heating time and the first time compensation value. The sum of the current heat generation timing and the first time compensation value (actual heat generation timing) is determined.

And step S6, controlling the first heating substrate to generate heat at the actual heating moment so as to control the ratio between the position error and the second distance within a preset range.

After step S5, a second heat-generating substrate whose distance from the first heat-generating substrate is a width position error may be determined in the width direction of the printing medium. And controlling the second heating base body to generate heat at the actual heating moment so as to move the pattern printed by the first heating base body from the first preset position to the second preset position in the second direction. And controlling the first heating substrate to generate heat at the actual heating moment so as to move the pattern printed by the first heating substrate from the first preset position to the second preset position in the first direction.

In the embodiment, the current heating time of the first heating base body is compensated through the first time compensation value, so that the pattern printed by the first heating base body is moved from the first preset position to the second preset position in the moving direction of the printing medium, the ratio between the position error of the pattern printed by the first heating base body and the second distance is controlled within the preset range, and the printing precision of the printer is improved.

Preferably, the preset range may be 1% o. This improves the printing accuracy.

Embodiment mode 2

Steps S1 to S6 of embodiment 2 are substantially the same as steps S1 to S6 of embodiment 1. Embodiment 2 differs from embodiment 1 in that step S3 and step S5 of embodiment 2 further include the steps of:

in this embodiment, step S3 further includes determining a second time compensation value based on the length position error and the rotational speed of the platen roller disposed below the print head.

In this embodiment, a rotary encoder may be provided on the platen roller in the printer, and the rotational speed of the platen roller may be acquired by the rotary encoder. And determining an error rotation angle of the platen roller corresponding to the length position error according to the length position error and the diameter of the platen roller (in the printing process of the thermal transfer printer, when the platen roller rotates by the error rotation angle, the printing medium moves by the length position error, namely, the length position error is equal to the arc length corresponding to the error rotation angle of the platen roller). The ratio between the error rotation angle and the rotation speed of the platen roller (second time compensation value) is determined.

In the present embodiment, the actual heat generation time in step S5 may be the sum of the current heat generation time, the first time compensation value, and the second time compensation value. Therefore, when the platen roller rotates to an angle corresponding to the first preset position, the current printing time is compensated through the first time compensation value and the second time compensation value, the shape deviation of the platen roller, such as the position deviation caused by roundness, coaxiality, circle run-out and the like, is avoided, and the printing precision is further improved.

The invention also provides a thermal transfer printer. The thermal transfer printer may be controlled by the error correction method described above.

In this embodiment, the thermal transfer printer may be controlled by the error correction method, and compensate the current heating time of the first heating substrate by the first time compensation value, so as to move the pattern printed by the first heating substrate from the first preset position to the second preset position in the moving direction of the printing medium, so that the ratio between the position error of the pattern printed by the first heating substrate and the second distance is controlled within the preset range, thereby increasing the printing accuracy of the printer.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims (10)

1. An error correction method of a thermal transfer printer, the method comprising: acquiring a first preset position and a first reference position of the image-text information printed by the printer; characterized in that the method further comprises:
determining a first distance between the first preset position and the first reference position, and acquiring a second distance between a second preset position and a second reference position of the electronic document corresponding to the image-text information, wherein the first preset position corresponds to the second preset position, and the first reference position corresponds to the second reference position;
determining a position error from the first distance and the second distance, the position error including a length position error in a moving direction of a printing medium;
determining a first time compensation value according to the length position error and the moving speed of the printing medium;
acquiring the current heating moment of a first heating base body of the printing head corresponding to the first preset position;
determining the actual heating moment according to the current heating moment and the first time compensation value;
and controlling the first heating substrate to heat at the actual heating moment so as to control the ratio between the position error and the second distance within a preset range.
2. The method of claim 1, wherein the position error is a difference between the first distance and the second distance, and the predetermined range is less than or equal to 1 ‰.
3. The method of claim 1, wherein the actual heat generation time is a sum of the current heat generation time and the first time offset value.
4. The method according to claim 1, wherein the first predetermined location is a boundary between different colors in the teletext information.
5. The method of claim 1, further comprising:
and observing the pattern of the image-text information and the pattern of the electronic document through a high magnification magnifier to determine the position error.
6. The method of claim 1, further comprising:
and acquiring the pattern of the image-text information through a camera or a camera, and comparing the pattern of the image-text information with the pattern of the electronic document through image comparison software to determine the position error.
7. The method according to claim 1, wherein the positional error further includes a width positional error in a width direction of the printing medium;
correspondingly, the controlling the first heating substrate to generate heat at the actual heating moment comprises:
and controlling a second heat generating base body, which is located at a distance from the first heat generating base body in the width direction of the printing medium by the width position error, to generate heat at the actual heat generating timing.
8. The method of claim 1, wherein after determining the position error based on the first and second distances, prior to determining an actual heat generation time based on the current heat generation time and the first time compensation value, the method comprises:
determining a second time compensation value according to the length position error and the rotating speed of a platen roller arranged below the printing head;
correspondingly, determining the actual heating time according to the current heating time and the first time compensation value comprises:
and determining the actual heating moment according to the current heating moment, the first time compensation value and the second time compensation value.
9. The method of claim 8, wherein the actual heat generation time is a sum of the current heat generation time, the first time offset value, and the second time offset value.
10. A thermal transfer printer, characterized in that it is controlled by a method according to any one of claims 1 to 9.
CN201910372491.5A 2019-05-06 2019-05-06 Error correction method for thermal transfer printer and thermal transfer printer CN110154545B (en)

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CN109367245A (en) * 2018-10-26 2019-02-22 湖南鼎致远科技发展有限公司 A kind of paper feed precision control device and its thermal transfer printer
CN109677137A (en) * 2017-10-18 2019-04-26 北京鼎一致远科技发展有限公司 Improve the method for saving the thermal transfer printer repetitive positioning accuracy under carbon ribbon mode

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EP1431045A1 (en) * 2002-12-17 2004-06-23 Agfa-Gevaert A modeling method for taking into account thermal head and ambient temperature.
JP2011062941A (en) * 2009-09-18 2011-03-31 Toshiba Tec Corp Thermal printer and method for controlling thermal printer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0626266A2 (en) * 1993-05-27 1994-11-30 Canon Kabushiki Kaisha Recording apparatus controlled with head characteristics and recording method
CN1131613A (en) * 1994-12-02 1996-09-25 精工爱普生株式会社 Driving control of method of thermal head
CN106313906A (en) * 2015-06-23 2017-01-11 山东新北洋信息技术股份有限公司 Thermal transfer printer and control method thereof
CN106696471A (en) * 2015-07-21 2017-05-24 山东新北洋信息技术股份有限公司 Printer and control method thereof
CN109677137A (en) * 2017-10-18 2019-04-26 北京鼎一致远科技发展有限公司 Improve the method for saving the thermal transfer printer repetitive positioning accuracy under carbon ribbon mode
CN109367245A (en) * 2018-10-26 2019-02-22 湖南鼎致远科技发展有限公司 A kind of paper feed precision control device and its thermal transfer printer

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