WO2017012504A1 - 打印机及其控制方法 - Google Patents

打印机及其控制方法 Download PDF

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Publication number
WO2017012504A1
WO2017012504A1 PCT/CN2016/090080 CN2016090080W WO2017012504A1 WO 2017012504 A1 WO2017012504 A1 WO 2017012504A1 CN 2016090080 W CN2016090080 W CN 2016090080W WO 2017012504 A1 WO2017012504 A1 WO 2017012504A1
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WO
WIPO (PCT)
Prior art keywords
printing
print
printing paper
distance
positioning mark
Prior art date
Application number
PCT/CN2016/090080
Other languages
English (en)
French (fr)
Inventor
王鑫
王训鹏
邓少华
王国凯
王春涛
Original Assignee
山东新北洋信息技术股份有限公司
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 山东新北洋信息技术股份有限公司 filed Critical 山东新北洋信息技术股份有限公司
Priority to US15/746,623 priority Critical patent/US10166787B2/en
Publication of WO2017012504A1 publication Critical patent/WO2017012504A1/zh

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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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/008—Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins
    • 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
    • B41J2/325—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 by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • B41J11/46—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering by marks or formations on the paper being fed
    • 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
    • B41J2/525—Arrangement for multi-colour printing, not covered by group B41J2/21, e.g. applicable to two or more kinds of printing or marking process
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
    • H04N1/00026—Methods therefor
    • H04N1/00037—Detecting, i.e. determining the occurrence of a predetermined state
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
    • H04N1/00071—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for characterised by the action taken
    • H04N1/00082—Adjusting or controlling
    • H04N1/00087—Setting or calibrating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/50—Picture reproducers
    • H04N1/506—Reproducing the colour component signals picture-sequentially, e.g. with reproducing heads spaced apart from one another in the subscanning direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/603—Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer
    • H04N1/6033—Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer using test pattern analysis
    • H04N1/6044—Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer using test pattern analysis involving a sensor integrated in the machine or otherwise specifically adapted to read the test pattern
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6072—Colour correction or control adapting to different types of images, e.g. characters, graphs, black and white image portions

Definitions

  • the present application relates to the field of printing, for example, to a printer and a method of controlling the same.
  • the thermal transfer printer includes a thermal print head (hereinafter referred to as a print head) and a roller disposed opposite to the print head, the printing paper and the ribbon pass between the print head and the roller, and the ribbon is located on the print head and the printing paper.
  • the ink layer of the ribbon is in contact with the printing paper, and the printing head transfers the dye on the ink layer of the ribbon to the printing paper to form an image by heating the ribbon.
  • the related art discloses a thermal transfer printer and a control method for printing a color page, the printer including a driving unit and a photoelectric sensor, and the driving unit drives the printing paper to move in the printing path.
  • the printer When printing a color page, the user first installs a ribbon of the first color (hereinafter referred to as a reference color) on the printer, and the printer determines the starting position of each page on the printing paper by recording the distance moved by the printing paper, and at each The page uses a reference color ribbon to print a positioning mark, and then prints the image of the corresponding color using the reference color ribbon on the page; the user sequentially installs the second, third, and other colors of the color ribbon on the printer.
  • a reference color the first color
  • the printer determines whether the printed positioning mark reaches the detecting position of the photoelectric sensor by comparing the electrical signal outputted by the photoelectric sensor with a preset threshold, and detects that the positioning mark reaches the photoelectric sensor.
  • the starting position of the page is transported to the print position of the print head by driving the paper to move the preset fixed distance, and the image of the corresponding color is printed on the page using the currently installed ribbon, and the printer uses multiple colors in one page.
  • the ribbon overprint image completes the printing of the color page.
  • FIG. 1 is a waveform diagram of an electrical signal output by a photoelectric sensor when a positioning mark printed on a printing paper is fixedly disposed, wherein an electrical signal output by the photoelectric sensor is a voltage value, and a positioning mark is overlaid on the photoelectric sensor.
  • the voltage value of the sensor output is low, and the voltage value of the photoelectric sensor output is not high when the positioning mark is not covered on the photoelectric sensor.
  • the leading edge of the positioning mark reaches the photoelectric sensing along the leading edge of the conveying direction.
  • the detection position of the device the voltage value output by the photoelectric sensor begins to decrease.
  • the voltage value output by the photoelectric sensor drops to a preset threshold value V0.
  • the controller of the printer determines that the positioning mark reaches the detection position of the photoelectric sensor due to There is a time interval when the leading edge of the positioning mark reaches the detecting position of the photoelectric sensor until the controller of the printer determines that the positioning mark reaches the detecting position of the photoelectric sensor. Therefore, when the controller determines that the positioning mark reaches the detecting position of the photoelectric sensor, the leading edge of the positioning mark actually Has passed the detection position of the photoelectric sensor.
  • the printer determines the starting position of each page by recording the distance of the printing paper when the color of the reference color is installed, when installing the ribbon of other colors, the printer determines the start of each page by the detected positioning mark. Position, as described above, there is a detection error when the photosensor detects the positioning mark, and therefore, there is an error in the start position of the page determined when the ribbon of the other color is mounted, and the start position of the page determined when the ribbon of the reference color is mounted, This results in the use of a reference color ribbon when a set image is printed at a print position of the page and a set image is printed at the print position of the page using a ribbon of the reference color within a page. The printed image does not match the actual print position of the image printed with the ribbon of other colors, resulting in inaccurate image overprinting in the color page.
  • the main purpose of the present application is to provide a printer and a control method thereof for solving the problem that the related art printer is inaccurately positioned when positioning a page on the printing paper multiple times.
  • a method of controlling a printer includes: printing a first positioning mark and a first print content on the printing paper when performing printing using a color ribbon of a reference color, wherein the first positioning mark is used to mark a position of the first page on the printing paper, the first printing content The content printed for the ribbon using the reference color; when printing is performed using the ribbon of the i-th color, the first positioning mark on the printing paper is first detected, and then the first page is offset according to the first positioning mark and the printing position deviation compensation value
  • the starting position is conveyed to the printing position of the print head, and the printing content of the first page in the i-th printing content is printed, wherein the printer includes a marking sensor and a printing head, the marking sensor is used for detecting the positioning mark on the printing paper, and the printing head is used for Printing is performed on the printing paper, and the printing position deviation compensation value is the distance between the starting position of the first positioning mark and the detecting position of the marking sensor when the marking sensor detects that
  • the distance between the detection position of the marking sensor and the printing position of the print head is a first distance L1
  • the printing position deviation compensation value is H
  • the distance between the detection position of the marking sensor and the printing position of the print head is a first distance L1
  • the printing position deviation compensation value is corrected by the following printing position correction method: after the color ribbon of the reference color is installed on the printer, Printing a first mark and a correction positioning mark on the printing paper, wherein a starting position of the first mark and a starting position of the correcting positioning mark are on the printing paper by a second distance L2; during the feeding of the printing paper Detecting the correction positioning mark, determining whether the correction positioning mark reaches the detection position of the mark sensor; if it is determined that the correction positioning mark reaches the detection position of the mark sensor, controlling the paper exit, wherein the paper withdrawal distance is the first distance a sum of L1 and a second distance L2; printing a second mark on the printing paper; obtaining a separation distance of the first mark and the second mark along a conveying direction of the printing paper, and using the spacing distance as a printing position deviation compensation value.
  • the distance between the detection position of the marking sensor and the printing position of the print head is a first distance L1
  • the printing position deviation compensation value is corrected by the following printing position correction method: after the color ribbon of the reference color is installed on the printer, Printing a correction positioning mark on the printing paper; detecting a correction positioning mark during the paper feeding process, determining whether the corrected positioning mark reaches the detection position of the marking sensor; if it is determined that the corrected positioning mark reaches the detection position of the marking sensor, then controlling The paper exits the paper, wherein the paper withdrawal distance is the first distance L1; the second mark is printed on the printing paper; the distance between the corrected positioning mark and the second mark along the conveying direction of the printing paper is obtained, and the separation distance is obtained As the print position deviation compensation value.
  • the printer further includes a memory for storing the print position deviation compensation value, and after obtaining the print position deviation compensation value by the print position correction method, storing the print position deviation compensation value into the memory, and acquiring the print position deviation compensation
  • the method further comprises: determining whether the ribbon of the reference color installed by the printer changes; if it is determined that the ribbon of the reference color installed by the printer changes, the printing position deviation compensation is obtained by recalibrating the printing position correction method. Value; if it is judged that the ribbon of the reference color installed in the printer has not changed, it is read from the memory. Print position deviation compensation value.
  • a printer in a second aspect of the application, includes a print head configured to perform printing on the printing paper, a printing paper driving unit configured to drive the printing paper to move in the printing path, and a marking sensor configured to detect the positioning mark on the printing paper, including detecting the printing paper a first positioning mark, wherein the first positioning mark is for marking a position of the first page on the printing paper; and the controller is configured to print the first print on the printing paper when the printing head controls the printing of the color of the reference color Positioning mark and first print content, when controlling the print head to perform printing using the i-th color ribbon, first detecting the first positioning mark by the mark sensor, and then controlling the paper drive unit according to the first positioning mark and the print position deviation compensation value
  • the starting position of the first page is conveyed to the printing position of the print head, and the printing content of the first page in the i-th printing content is printed, wherein the first printing content is the content printed by the color ribbon using the reference color, and the printing position deviation compensation
  • the distance between the detection position of the marking sensor and the printing position of the print head is a first distance L1
  • the printing position deviation compensation value is H
  • the controller is configured to compensate according to the first positioning mark and the printing position deviation by the following method.
  • the value conveys the starting position of the first page to the printing position of the printing head: during the conveying process of the printing paper, determining whether the first positioning mark reaches the detecting position of the marking sensor according to the detection signal output by the marking sensor; if the first position is determined
  • the printing paper driving unit is controlled to drive the printing paper to move in the first direction by a distance L1+H, wherein the first direction is the direction from the marking sensor to the printing head.
  • the controller is further configured to correct the printing position deviation compensation value by the following printing position correction method: installing the reference color on the printer After the ribbon, the print head is controlled to print the first mark and the correction mark on the printing paper, wherein the starting position of the first mark and the starting position of the correct positioning mark on the printing paper are the second distance L2;
  • the correction positioning mark is detected by the marking sensor, and it is judged whether the correction positioning mark reaches the detection position of the marking sensor; and when it is judged that the correction positioning mark reaches the detection position of the marking sensor, the printing paper driving unit drive is controlled.
  • Printing paper ejecting wherein the ejecting distance of the printing paper is the sum of the first distance L1 and the second distance L2; controlling the printing head to print the second marking on the printing paper; and acquiring the first marking and the second marking along the printing paper
  • the separation distance of the conveying direction is used as the printing position deviation compensation value.
  • the controller is further configured to correct the printing position deviation compensation value by the following printing position correction method: installing the reference color on the printer After the ribbon, the control print head prints the correction positioning mark on the printing paper; during the paper feeding process, the correction positioning mark is detected by the marking sensor, and it is judged whether the correction positioning mark reaches the detection position of the marking sensor; When the positioning mark reaches the detecting position of the marking sensor, controlling the printing paper driving unit to drive the printing paper to eject the paper, wherein the paper withdrawal distance of the printing paper is the first distance L1; controlling the printing head to print the second marking on the printing paper; and obtaining the correction The distance between the positioning mark and the second mark in the conveying direction of the printing paper, and the spacing distance is used as the printing position deviation compensation value.
  • the printer further includes a memory, the memory is configured to store the print position deviation compensation value obtained by the print position correction method, and the controller is further configured to determine whether the ribbon of the reference color installed by the printer changes, and determine the printer When the ribbon of the installed reference color changes, the print position deviation compensation value is recalibrated by the print position correction method, and the print position is read from the memory when it is determined that the ribbon of the reference color installed in the printer has not changed. Deviation compensation value.
  • the first positioning mark and the first print content are printed on the printing paper, and when printing is performed using the ribbon of the i-th color, according to the first positioning mark and the printing position
  • the deviation compensation value conveys the starting position of the first page to the printing position of the print head, and then prints the printed content of the first page in the ith print content, which solves the problem that the related art printer does not overprint the image when printing the color page. Accurate questions, which in turn improve the accuracy of image overprinting when printing color pages.
  • FIG. 1 is a schematic diagram showing a waveform of an electrical signal output by a photoelectric sensor when a positioning sensor printed on a printing paper is fixedly disposed;
  • FIG. 2 is a schematic view showing the module configuration of a thermal transfer printer according to a first embodiment of the present application
  • FIG. 3 is a schematic structural view of a thermal transfer printer according to a first embodiment of the present application.
  • FIG. 4 is a partially enlarged schematic view showing the structure of a thermal transfer printer according to a first embodiment of the present application
  • 5A is a flowchart of a control method of a thermal transfer printer according to a first embodiment of the present application
  • 5B is a flowchart of a control method of a thermal transfer printer according to a second embodiment of the present application.
  • FIG. 6 is a flowchart of a print position correction method of a thermal transfer printer according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a printing manner of a first identifier and a first positioning mark according to an embodiment of the present application
  • FIG. 8A to FIG. 8C are schematic diagrams showing the theoretical situation of the positional change of the printing paper in the printing channel after the first marking and the first positioning mark are printed according to an embodiment of the present application;
  • FIG. 9 is a schematic diagram of a second identification and a first identification and a printing manner of a first positioning mark according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of actual relative positions of a first identifier and a second marker according to an embodiment of the present application.
  • the printer 1 includes a controller 10, a communication unit 11, a RAM memory 12, a flash memory 13, a printing unit 14, and a ribbon.
  • the controller 10 is configured to control other modules to perform work and perform calculation and processing of data, for example,
  • the control communication unit 11 performs data transfer between the printer 1 and a print requesting device such as a computer and controls the printing unit 14 to perform image printing and the like.
  • the communication unit 11 is arranged to perform data transfer between the printer 1 and the print requesting device, for example, the communication unit 11 receives the print control command and print data transmitted by the print requesting device.
  • the RAM memory 12 includes a receive buffer 121, a print buffer 122, and a temporary buffer 123, wherein the receive buffer 121 is set to store print control commands and print data received by the communication unit 11, and the print buffer 122 is set to store for transmission.
  • the temporary buffer 123 is set to cache the printer 1
  • the data and variables generated during the running of the control program are controlled, for example, the temporary buffer 123 is set to buffer the print position deviation compensation value corrected by the print position correction method.
  • the flash memory 13 is configured to store a control program of the printer 1 and a fixed value required during the running of the program, wherein the fixed value includes a first preset threshold T1, a first distance L1 and a second distance L2, wherein the first preset threshold T1 is for determining whether the positioning mark on the printing paper is located at the detecting position of the marking sensor 17, the first distance L1 is the distance between the detecting position of the marking sensor 17 and the printing position of the printing head 142, and the second distance L2 is the first marking The starting position and the distance from the starting position of the correction positioning mark on the printing paper.
  • the flash memory 13 can also be arranged to store the print position deviation compensation value corrected by the print position correction method.
  • the printing unit 14 is arranged to print an image on the surface of the printing paper.
  • the printing unit 14 includes a print head controller 141, a print head 142, a roller 143, and a printing paper driving unit 144, wherein the print head controller 141 is set to a control signal output from the controller 10 and a point stored in the print buffer 122.
  • the array data outputs a drive signal from the printhead 142, the printhead 142 is tangentially disposed with the roller 143 in the print path, the print paper and ribbon are passed between the two, and the ribbon is located between the printhead 142 and the print paper.
  • the ink layer of the ribbon is in contact with the printing paper, and the printing head 142 includes a plurality of heating elements arranged in a line in the width direction of the printing paper (ie, a direction perpendicular to the conveying direction of the printing paper), and the heating element of the printing head 142
  • the dye on the ink layer of the ribbon is transferred onto the printing paper according to the heat generated by the driving signal transmitted from the head driver 141, and an image is formed on the printing paper.
  • the printing paper driving unit 144 includes a printing paper motor driver 1441, a printing paper motor 1442, and a printing paper driving roller 1443, and the printing paper motor driver 1441 is provided to supply an operating current to the printing paper motor 1442 according to a control signal output from the controller 10 to drive printing.
  • the output shaft of the paper motor 1442 is rotated, and the output shaft of the paper motor 1442 is connected to the roller 143 and the printing paper driving roller 1443, when the printing paper motor When the output shaft of 1442 is rotated, the roller 143 and the paper driving roller 1443 are rotated, thereby driving the printing paper to move in the printing path.
  • the ribbon transceiver unit 15 is arranged to dispense and recycle the ribbon.
  • the ribbon transceiver unit 15 includes a ribbon dispensing shaft 151, a ribbon recovery shaft 152, and a ribbon driving unit 153, wherein the ribbon dispensing shaft 151 is used to support an unused ribbon, and the ribbon recovery shaft 152 is used to support the use.
  • the ribbon, the unused ribbon is taken up by the ribbon dispensing shaft 151, passed between the printhead 142 and the roller 143, and wound onto the ribbon take-up shaft 152, and the ribbon drive unit 153 is set to drive the ribbon dispensing shaft.
  • the 151 and/or ribbon recovery shaft 152 rotates.
  • the ribbon drive unit 153 includes a ribbon dispensing motor driver 1531, a ribbon dispensing motor 1532, a ribbon recovery motor driver 1533, and a ribbon recovery motor 1534.
  • the ribbon dispensing motor driver 1531 is arranged to supply an operating current to the ribbon dispensing motor 1532 in accordance with a control signal output from the controller 10 to drive the output shaft of the ribbon dispensing motor 1532 to rotate, the output shaft of the ribbon dispensing motor 1532 and the ribbon dispensing
  • the shaft 151 is drivingly connected, and the ribbon dispensing shaft 151 rotates with the ribbon dispensing shaft 151 to rotate the unused ribbon from the ribbon dispensing shaft 151; the ribbon recovery motor driver 1533 is set to be based on the controller.
  • the output control signal of 10 outputs an operating current to the ribbon recovery motor 1534 to drive the output shaft of the ribbon recovery motor 1534 to rotate.
  • the output shaft of the ribbon recovery motor 1534 is coupled to the ribbon recovery shaft 152, and the ribbon recovery motor 1534 is
  • the ribbon recovery shaft 152 rotates as the output shaft rotates to recover the used ribbon to the ribbon recovery shaft 52.
  • the printhead lift unit 16 is configured to lift or depress the printhead 142 such that the printhead 142 is tangential or separate from the roller 143.
  • the head lift unit 16 includes a cam 161, a cam motor driver 162, and a cam motor 163, wherein the cam motor driver 162 is provided to supply an operating current to the cam motor 163 in accordance with a control signal output from the controller 10 to drive the output shaft of the cam motor 163. Rotating, the output shaft of the cam motor 163 is drivingly coupled to the cam 161.
  • the cam 161 is engaged with the fixing plate of the print head 142, and the cam motor 163 drives the cam 161 to rotate at different set angles so that the print head 142 is in the raised or depressed position.
  • the marking sensor 17 is arranged to detect whether the marking portion of the printing paper reaches the detecting position of the marking sensor 17, and the marking sensor 17 is a reflection sensor or a transmission sensor.
  • the marking sensor 17 is a reflection sensor, including a light generator and a light receiver, The light generator and the light receiver are disposed in the printing channel, and the two are respectively electrically connected to the controller 10.
  • the light generator emits light having a certain intensity under the action of the driving current provided by the controller 10, and the light is marked by the printing paper.
  • the portion or the non-marked portion of the printing paper is reflected and received by the optical receiver, and the optical receiver converts the received optical signal into an electrical signal and delivers the electrical signal to the controller 10 due to the marked portion of the printing paper and the printing paper.
  • the reflectance of the non-marking portion is different, therefore, when the light emitted by the light generator is irradiated on the marked portion of the printing paper or the non-standard printing paper When the portion is recorded, the light intensity received by the optical receiver is different, and a different detection signal is output to the controller 10.
  • the light receiver of the marking sensor 17 when the marked portion of the printing paper is located at the detecting position of the marking sensor 17, the light receiver of the marking sensor 17 outputs a first detection signal, and when the non-marking portion of the printing paper is located at the detecting position of the marking sensor 17, the marking sensor 17 The light receiver outputs a second detection signal, and when the controller 10 determines that the detection signal output from the light receiver of the mark sensor 17 is changed from the second detection signal to the first detection signal, it is determined that the mark portion of the printing paper reaches the detection of the mark sensor 17. position.
  • the printer includes a ribbon holder 2 and a base 3, wherein the ribbon holder 2 is pivotally connected to the base 3 and can be opposite The base 3 is opened or closed.
  • the print head 142 of the printing unit 14 is fixedly connected to the print head fixing plate 1421, the print head fixing plate 1421 is movably connected with the ribbon holder 2, and the roller 143 is supported by the base 3, and is rotatable about its own axis when the ribbon holder 2 is opposite
  • the printhead 142 and the roller 143 are tangent in the print path, wherein the location of the tangent of the two in the print path is the print position of the printhead 142.
  • the ribbon dispensing shaft 151 and the ribbon recovery shaft 152 of the ribbon transceiver unit 15 are both located on the side of the ribbon holder 2 facing away from the printhead 142, supported by the ribbon holder 2, and closed when the ribbon holder 2 is closed relative to the base 3. At the time, the axes of the ribbon dispensing shaft 151 and the ribbon collecting shaft 152 are parallel to the axis of the roller 143.
  • the ribbon holder 2 When the ribbon 20 is mounted, the ribbon holder 2 is opened relative to the base 3, and the unused ribbon roll is supported by the ribbon dispensing shaft 151. Pulling the leading end of the ribbon 20 causes the ribbon 20 to bypass the printhead 142 and wrap around On the ribbon recovery shaft 152.
  • the paper roll 30 is supported by the paper roll supporting shaft 31, and the printing paper 21 is taken out from the paper roll 30 to cover the surface of the roller 143.
  • the printing paper 21 is located in the ink ribbon 20 and the printing adhesive. Between the rollers 143, the ink layer of the ribbon 20 is in contact with the printing paper 21.
  • the printing paper motor 1442 is rotated, and the driving roller 143 and the printing paper driving roller 1443 are rotated in the forward direction (clockwise direction in FIG. 3) to move the printing paper 21 downstream (in the direction indicated by the arrow 40 in the figure), the ribbon
  • the dispensing motor 1532 drives the ribbon dispensing shaft 151 to rotate
  • the ribbon recovery motor 1534 drives the ribbon recovery shaft 152 to rotate, so that the ribbon 20 is conveyed by the ribbon dispensing shaft 151 to the ribbon recovery shaft 152, and the heating element of the printing head 142 is controlled.
  • the heat causes the dye on the ink layer of the ribbon 20 to be transferred onto the printing paper 21 to form a set image.
  • the cam motor 163 of the print head lifting unit 16 is fixedly coupled to the base 3, and the cam 161 is drivingly coupled to the cam motor 163 and mated with the print head fixing plate 1421.
  • the cam motor 163 drives the cam 161 to rotate at different set angles, the cam motor 163 is utilized.
  • the matching position of the cam 161 and the print head fixing plate 1421 is changed to drive the print head fixing plate 1421 to move relative to the ribbon holder 2, so that the print head 142 is in the raised or depressed position, and when the print head 142 is in the depressed position, printing
  • the head 142 is tangentially matched with the roller 143 when the print head 142 In the raised position, the printhead 142 is separated from the roller 143.
  • FIG. 4 is a partially enlarged schematic view showing the structure of a thermal transfer printer according to a first embodiment of the present application, as shown in the drawing, in the direction in which the printing paper is conveyed, the marking sensor 17 is located downstream of the printing head 142, and the detection position and printing of the marking sensor 17 are shown.
  • the distance between the printing positions of the head 142 is L1.
  • FIG. 5A is a flow chart of a method of controlling a thermal transfer printer according to a first embodiment of the present application. As shown, the method includes the following steps:
  • the first positioning mark is used to mark the position of the first page on the printing paper
  • the first page is any one of the pages printed on the printing paper
  • the first printing content is used The color of the reference color is printed.
  • the first positioning mark and the first print content are printed on the printing paper.
  • the printer of the embodiment of the present application includes a print head for performing printing on the printing paper, a printing paper driving unit that drives the printing paper to move in the printing path, and a marking sensor for detecting the positioning mark on the printing paper, and the printer controls the printing head.
  • a print head for performing printing on the printing paper
  • a printing paper driving unit that drives the printing paper to move in the printing path
  • a marking sensor for detecting the positioning mark on the printing paper
  • the print position deviation compensation value is a distance between the start position of the first positioning mark and the detection position of the mark sensor when the mark sensor detects that the first positioning mark reaches the detection position of the mark sensor, and the i-th color is other than the reference color.
  • the color, the ith print content is the content printed using the ribbon of the i-th color.
  • the print position deviation compensation value may be a print position deviation compensation value corrected by the print position correction method of the embodiment of the present application, or may be a pre-stored print position deviation compensation value, based on the first positioning mark and the print position deviation compensation value.
  • the buffer print position deviation compensation value may be read from the RAM memory 12, or the stored print position offset compensation may be read from the flash memory 13. value.
  • printing can be performed using the ribbon of the i-th color.
  • the first positioning mark on the printing paper is first detected, and then the starting position of the first page is conveyed to the printing position of the printing head according to the first positioning mark and the printing position deviation compensation value. , prints the printed content of the first page in the i-th print content.
  • the printer When the printer controls the print head to perform printing using the i-th color ribbon, the printer first obtains the print position deviation compensation value and detects the first positioning mark by the mark sensor, and then controls the paper drive unit according to the first positioning mark and the print position deviation compensation value.
  • the starting position of the first page is conveyed to the printing position of the print head, and the printing head is controlled to print the printed content of the first page in the ith print content on the first page of the printing paper.
  • the distance between the detection position of the marking sensor and the printing position of the print head is the first distance L1
  • the printing position deviation compensation value is H
  • the starting position of the first page is conveyed according to the first positioning mark and the printing position deviation compensation value.
  • the start position of the first page is transported to the print position of the print head according to the first positioning mark and the print position deviation compensation value, and then the first print content is printed.
  • the printed content of one page improves the accuracy of image overprinting when printing color pages.
  • FIG. 5B is a flowchart of a method for controlling a thermal transfer printer according to a second embodiment of the present application, which may be an optional embodiment of the embodiment shown in FIG. 5A, as shown in FIG. 5B, the embodiment The method includes the following steps:
  • the print position correction is performed using the ribbon of the reference color.
  • the user Before performing this step, the user installs a monochrome color of the reference color on the printer, and mounts the paper roll wrapped with blank printing paper onto the paper support mechanism, pulling the front end of the printing paper (ie, the paper head), so that the paper head is made of paper.
  • the print head and the mark sensor are unfolded in the print path, and the user presses the ribbon holder to close the ribbon holder relative to the base so that the printer can perform the print position correction of this step using the reference color ribbon.
  • the print position correction method includes the following steps:
  • the controller controls the print head lifting unit to press the print head to match the print head and the roller, and controls the printing unit to print the first mark on the printing paper and correct the positioning mark, wherein the correct positioning mark corresponds to the position of the mark sensor, and the printing paper
  • the correction positioning mark passes through the marking sensor when conveyed in the printing path, and the distance between the starting position of the first marking and the starting position of the correction positioning mark on the printing paper is the second distance L2.
  • the correction positioning mark is a positioning mark printed on the printing paper when the printing position correction is performed.
  • FIG. 7 is a schematic diagram of a printing manner of a first marking and a correction positioning mark according to an embodiment of the present application.
  • the mark 61 is a gray scale block, and the first mark is located on the first side of the printing paper 21, and optionally, the first side is the left side of the printing paper, and the correction positioning mark 62 is located on the printing paper along the paper feeding direction. Behind the first mark 61, the distance between the start position 611 of the first mark 61 and the start position 621 of the correction mark mark 62 on the printing paper is the second distance L2.
  • the controller controls the printing paper driving unit to drive the printing paper feeding, the controller detects the correction positioning mark during the paper feeding, and conveys the starting position 611 of the first marking to the printing position of the printing head based on the detected correction positioning mark.
  • the method includes: the controller controls the print head lifting unit to lift the print head to separate the print head from the roller. Then, the controller controls the printing paper driving unit to drive the printing paper feed, and detects whether the correction positioning mark reaches the detection position of the marking sensor during the paper feeding process, and the controller passes the detection signal output by the marking sensor with the first preset threshold T1.
  • determining whether the corrected positioning mark reaches the detecting position of the marking sensor for example, when the detecting signal output by the marking sensor is greater than the first preset threshold T1, determining that the corrected positioning mark is not located at the detecting position of the marking sensor, when the marking sensor outputs
  • the controller determines that the correction positioning mark reaches the detection of the marking sensor.
  • the controller controls the printing paper driving unit to stop driving the paper feeding, and controls the printing paper driving unit to drive the paper to eject the paper.
  • the controller records the distance moved by the printing paper, and when the controller records the printing The distance the paper moves is the first distance L1 and L2 of the second distance and controlling the driving unit stops driving the paper unwinding the paper, this time, the controller controls the pressure of the print head lifting unit printhead, the printing head and the mating roller.
  • FIG. 8A to FIG. 8C are schematic diagrams showing the theoretical situation of the positional change of the printing paper in the printing channel after the first marking and the correction positioning mark are printed according to the embodiment of the present application, as shown in the drawing, along the printing paper 21.
  • the detecting position 71 of the marking sensor is located downstream of the printing position 72 of the printing head, and the distance between the two is the first distance L1, and the printing paper 21 is in the process of printing by the printer. Moving in the printing path 70, as shown in FIG.
  • the end position 622 of the correction positioning mark 62 is located at the printing position 72 of the printing head, and the printing paper driving unit drives the printing paper to feed and print.
  • the paper 21 moves in the printing path 70 in the direction indicated by the arrow 50.
  • the controller determines that the correction positioning mark 62 reaches the detection position 71 of the marking sensor, theoretically, as shown in Fig. 8B, the starting position 621 of the correction positioning mark 62 is located.
  • the detecting position 71 of the sensor is marked.
  • the controller controls the printing paper driving unit to stop driving the printing paper feed, and controls the printing paper driving unit to drive the printing paper to eject. As shown in FIG.
  • the printing paper 21 is shown by the arrow 51.
  • the direction moves in the print path 70, as described above, the first distance L1 is the distance between the print position 72 of the print head and the detection position 71 of the mark sensor,
  • the distance L2 is the distance between the start position 611 of the first mark 61 and the start position 621 of the correction positioning mark on the printing paper, and therefore, when the paper ejection distance of the printing paper is equal to the sum of the first distance L1 and the second distance L2
  • the starting position 611 of the first mark 61 is located at the printing position 72 of the print head.
  • FIG. 9 is a schematic diagram of the second identifier and the first identifier and the printing manner of the corrected positioning mark according to the embodiment of the present application.
  • the second identifier 63 is A gray scale block, and the second mark is located on the second side of the printing paper 21, and optionally, the second side is the right side of the printing paper.
  • FIG. 10 is a schematic diagram of actual relative positions of a first marker and a second marker according to an embodiment of the present application, as the correction is made when the controller determines that the corrected alignment marker 62 reaches the detection position 71 of the marker sensor.
  • the starting position 621 of the positioning mark 62 has passed the detecting position 71 of the marking sensor.
  • the printing paper driving unit drives the printing paper to eject, and the printing paper 21 moves in the printing path 70 in the direction indicated by the arrow 51, when the printing paper is retracted.
  • the paper distance reaches the sum of the first distance L1 and the second distance L2
  • the starting position 611 of the first mark 61 has not reached the printing position 72 of the print head.
  • the printing unit prints the second mark.
  • the start position 631 of the second mark 63 and the start position 611 of the first mark 61 are separated by a certain distance H in the printing paper conveying direction. Since the controller can immediately determine that the correction positioning mark reaches the detection position of the mark sensor when the start position of the correction mark reaches the detection position of the mark sensor, when the paper withdrawal distance reaches the first distance L1 and the second distance L2 At the time of the sum, the starting position 611 of the first mark 61 just reaches the printing position 72 of the print head, that is, the value of the interval distance H is zero in this case. Therefore, the interval distance H is determined by the controller to correct the positioning mark. When the detection position of the mark sensor is reached, the start position of the correction mark has been caused by the detection position of the mark sensor.
  • the value of the distance H actually determines that the corrected position mark is reached by the controller.
  • the distance between the start position of the positioning mark and the detection position of the mark sensor is corrected.
  • the printer acquires the separation distance of the first mark and the second mark along the conveying direction of the printing paper, and stores the distance as a position deviation compensation value in the flash memory.
  • the user of the printer can measure the distance between the first mark and the second mark along the conveying direction of the printing paper by manual measurement, or collect the printed image on the printing paper by the image collecting device, and the computer analyzes the operation according to the collected printed image.
  • the method obtains the distance between the first mark and the second mark in the conveying direction of the printing paper, and the user of the printer sends the obtained distance between the first mark and the second mark in the conveying direction of the printing paper to the printer through the communication unit.
  • the printing manners of the first identifier, the second identifier, and the corrected positioning mark are not limited to the method described in this embodiment.
  • the corrected positioning mark may be directly used as the first identifier.
  • the printing paper driving unit drives the printing paper to feed the paper.
  • the printing paper driving unit is controlled to drive the printing paper to eject the paper, and the correction positioning is performed.
  • the starting position of the mark is conveyed to the print position of the print head, and then the second mark is printed.
  • the corrected positioning mark is directly used as the first mark, the value of L2 is zero.
  • the printer sequentially performs color page image printing using a monochrome ribbon of a different color, wherein when receiving a control command for performing printing using the color ribbon of the reference color, the positioning mark and the first print content are printed on the printing paper; when received When the printing control command is executed using the ribbon of the i-th color, the detected positioning marks on the printing paper are detected, and the starting position of each page is conveyed based on the detected positioning marks of each page and the positional deviation compensation value.
  • i is a positive integer and 2 ⁇ i ⁇ N, where N is the total number of color categories included in the color page to be printed, and the first print content is a reference for use.
  • the content printed by the color ribbon the ith print content is the content printed using the ribbon of the i-th color.
  • the controller determines the starting position of each page to be printed by recording the distance moved by the printing paper, and uses the color band of the reference color at each The starting position of the pages prints the positioning marks, and prints the setting image in each page.
  • the controller First, the starting position of each page, that is, the starting position of the positioning mark on the printing paper is conveyed to the detecting position of the marking sensor by detecting the detection signal outputted by the marking sensor, and then controlling the printing paper driving unit to drive the printing paper to eject the paper.
  • the distance (L1+H) conveys the start position of the page to the print position of the print head, and finally controls the printing unit to print the set image in the page. Since when the controller determines that the positioning mark reaches the detecting position of the marking sensor, the starting position of the positioning mark has passed the detecting position of the marking sensor, and the distance between the two is H, therefore, at this time, the driving paper ejecting distance is driven. After (L1+H), the starting position of the positioning mark just reaches the printing position of the print head, and when the set image is printed using the i-th color ribbon in the page, the color is printed using the i-th color ribbon. The image can be overprinted in a predetermined positional relationship with the image printed with the ribbon of the reference color.
  • the printer when the print position correction is performed and the position deviation compensation value is stored, when the printer performs image overprinting using the N color ribbons, if the color band of the reference color installed in the printer is unchanged, the printer can directly The stored position deviation compensation value is obtained from the flash memory for the next image overprinting.
  • the user may install a color ribbon of different colors as the color of the reference color each time the image overprinting is performed, which may cause the color of the printed positioning mark to change. Due to the different colors of the positioning marks, the optical characteristics of the positioning marks (light transmittance or The reflectance rate is also different. There is a difference in the electrical signals output when the mark sensor detects the positioning mark. This causes the printer to detect the positioning mark when using the ribbon of different colors to print the positioning mark.
  • the time interval between the start position reaching the detection position of the mark sensor and the time when the controller of the printer determines that the positioning mark reaches the detection position of the mark sensor is different, so that the color band of the reference color is different, the page determined by the detected positioning mark
  • the starting position is different from the initial position of the page determined when the color of the reference color is installed. Therefore, optionally, when the color of the reference color installed in the printer changes, the printer performs the process shown in FIG. 5B.
  • the control method uses the reference color ribbon to perform print position correction, acquires and saves the position deviation compensation value, and performs overprinting of the color page based on the acquired position deviation compensation value, so that no matter which color is used as the reference color, Achieve other color overprinting accuracy.
  • the thermal transfer printer and the control method thereof obtain a position deviation compensation value by performing print position correction by installing a reference color ribbon before performing image overprinting, and when using image printing, when using other color ribbons When printing, the print position adjustment is performed based on the position deviation compensation value.
  • the thermal transfer printer and the control method thereof of the embodiments of the present application can effectively solve the problem that the printer of the related art has inaccurate image overprinting when printing a color page.

Abstract

提供了一种打印机及其控制方法，该打印控制方法包括：使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容；使用第i颜色的色带执行打印时，根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，然后打印第i打印内容中第一页面的打印内容，第i打印颜色为除参考颜色之外的颜色，第i打印内容为使用第i颜色的色带打印的内容。打印位置偏差补偿值为标记传感器检测到第一定位标记到达标记传感器的检测位置时，第一定位标记的起始位置与标记传感器的检测位置之间的距离。这种方法解决了打印机在多次定位打印纸上的一个页面时定位不准确的问题。

Description

打印机及其控制方法 技术领域
本申请涉及打印领域，例如，涉及一种打印机及其控制方法。
背景技术
热转印打印机包括热打印头(以下简称打印头)和与打印头相对设置的辊轮，打印纸和色带在打印头和辊轮之间穿过，且色带位于打印头和打印纸之间，色带的油墨层与打印纸接触，打印头通过加热色带，使色带的油墨层上的染料转印到打印纸上形成图像。
相关技术公开了一种热转印打印机及打印彩色页面的控制方法，该打印机包括驱动单元和光电传感器，驱动单元驱动打印纸在打印通道中移动。打印彩色页面时，用户首先在打印机上安装第一种颜色(以下称为参考颜色)的色带，打印机通过记录打印纸移动的距离确定打印纸上每个页面的起始位置，并在每个页面中使用参考颜色的色带打印一个定位标记，然后在该页面中使用参考颜色的色带打印相应颜色的图像；用户依次在打印机上安装第二种、第三种等其他颜色的色带，驱动单元驱动打印纸移动的过程中，打印机通过将光电传感器输出的电信号与预设阈值进行比较确定已打印的定位标记是否到达光电传感器的检测位置，并在检测到定位标记到达光电传感器的检测位置时通过驱动打印纸移动预设固定距离将页面的起始位置输送至打印头的打印位置，在页面中使用当前安装的色带打印相应颜色的图像，打印机通过在一个页面内使用多种颜色的色带套印图像完成彩色页面的打印。
上述打印机在使用除参考颜色的色带以外的其他颜色的色带进行图像套印时，通过将光电传感器输出的电信号与预设阈值进行比较确定已打印的定位标记是否到达光电传感器的检测位置，图1是在打印纸上打印的定位标记经过固定设置的光电传感器时，光电传感器输出的电信号的波形示意图，其中，光电传感器输出的电信号为电压值，定位标记覆盖在光电传感器上时光电传感器输出的电压值为低电平，定位标记没有覆盖在光电传感器上时光电传感器输出的电压值为高电平，如图所示，在t1时刻，定位标记沿输送方向的前沿到达光电传感 器的检测位置，光电传感器输出的电压值开始下降，在t2时刻，光电传感器输出的电压值下降至预设阈值V0，此时，打印机的控制器判定定位标记到达光电传感器的检测位置，由于从定位标记的前沿到达光电传感器的检测位置时刻到打印机的控制器判定定位标记到达光电传感器的检测位置时刻存在时间间隔，因此，当控制器判定定位标记到达光电传感器的检测位置时定位标记的前沿实际已经经过光电传感器的检测位置。
由于当安装参考颜色的色带时，打印机通过记录打印纸移动的距离确定每个页面的起始位置，当安装其他颜色的色带时，打印机通过检测到的定位标记确定每个页面的起始位置，如上所述，光电传感器检测定位标记时存在检测误差，因此，安装其他颜色的色带时确定的页面的起始位置与安装参考颜色的色带时确定的页面的起始位置存在误差，这就导致在一个页面内，当使用参考颜色的色带在页面的一打印位置打印设定图像和使用其他颜色的色带在页面的该打印位置打印设定图像时，使用参考颜色的色带打印的图像与使用其他颜色的色带打印的图像的实际打印位置不一致，从而造成彩色页面内图像套印不准确。
针对相关技术的打印机在打印彩色页面时所存在的图像套印不准确的问题，目前尚未提出有效解决方法。
发明内容
本申请的主要目的在于提供一种打印机及其控制方法，以解决相关技术的打印机在多次定位打印纸上的一个页面时定位不准确的问题。
本申请的第一方面，提供了一种打印机的控制方法。包括：使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容，其中，第一定位标记用于标记打印纸上的第一页面的位置，第一打印内容为使用参考颜色的色带打印的内容；使用第i颜色的色带执行打印时，先检测打印纸上的第一定位标记，然后根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，打印第i打印内容中第一页面的打印内容，其中，打印机包括标记传感器和打印头，标记传感器用于检测打印纸上的定位标记，打印头用于在打印纸上执行打印，打印位置偏差补偿值为标记传感器检测到第一定位标记到达标记传感器的检测位置时，第一定位标记的起始位置与标记传感器的检测位置之间的距离，第i颜色为除参考颜色之外的颜色，第i打印内容为 使用第i颜色的色带打印的内容。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，打印位置偏差补偿值为H，其中，所述根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置包括：在打印纸的输送过程中，检测第一定位标记是否到达标记传感器的检测位置；如果检测到第一定位标记到达标记传感器的检测位置，则控制打印纸沿第一方向移动距离L1+H，其中，第一方向为由标记传感器至打印头的方向。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，打印位置偏差补偿值通过以下打印位置校正方法校正得到：在打印机上安装参考颜色的色带之后，在打印纸上打印第一标识和校正定位标记，其中，第一标识的起始位置和校正定位标记的起始位置在打印纸上的距离为第二距离L2；在打印纸的进纸过程中，检测校正定位标记，判断校正定位标记是否到达标记传感器的检测位置；如果判断出校正定位标记到达标记传感器的检测位置，则控制打印纸退纸，其中，打印纸的退纸距离为第一距离L1和第二距离L2的和；在打印纸上打印第二标识；获取第一标识和第二标识沿打印纸的输送方向的间隔距离，并将间隔距离作为打印位置偏差补偿值。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，打印位置偏差补偿值通过以下打印位置校正方法校正得到：在打印机上安装参考颜色的色带之后，在打印纸上打印校正定位标记；在打印纸的进纸过程中，检测校正定位标记，判断校正定位标记是否到达标记传感器的检测位置；如果判断出校正定位标记到达标记传感器的检测位置，则控制打印纸退纸，其中，打印纸的退纸距离为第一距离L1；在打印纸上打印第二标识；获取校正定位标记和第二标识沿打印纸的输送方向的间隔距离，并将间隔距离作为打印位置偏差补偿值。
可选的，打印机还包括存储器，存储器用于存储打印位置偏差补偿值，在通过打印位置校正方法得到打印位置偏差补偿值之后，将打印位置偏差补偿值存储至存储器中，在获取打印位置偏差补偿值时，该方法还包括：判断打印机所安装的参考颜色的色带是否发生变化；如果判断出打印机所安装的参考颜色的色带发生变化，则通过打印位置校正方法重新校正得到打印位置偏差补偿值；如果判断出打印机所安装的参考颜色的色带未发生变化，则从存储器中读取打 印位置偏差补偿值。
本申请的第二方面，提供了一种打印机。该打印机包括：打印头，设置为在打印纸上执行打印；打印纸驱动单元，设置为驱动打印纸在打印通道中移动；标记传感器，设置为检测打印纸上的定位标记，包括检测打印纸上的第一定位标记，其中，第一定位标记用于标记打印纸上的第一页面的位置；控制器，设置为在控制打印头使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容，在控制打印头使用第i颜色的色带执行打印时，先通过标记传感器检测第一定位标记，然后根据第一定位标记和打印位置偏差补偿值控制打印纸驱动单元将第一页面的起始位置输送至打印头的打印位置，打印第i打印内容中第一页面的打印内容，其中，第一打印内容为使用参考颜色的色带打印的内容，打印位置偏差补偿值为标记传感器检测到第一定位标记到达标记传感器的检测位置时，第一定位标记的起始位置与标记传感器的检测位置之间的距离，第i颜色为除参考颜色之外的颜色，第i打印内容为使用第i颜色的色带打印的内容。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，打印位置偏差补偿值为H，控制器设置为通过以下方法根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置：在打印纸的输送过程中，根据标记传感器输出的检测信号判断第一定位标记是否到达标记传感器的检测位置；如果判断出第一定位标记到达标记传感器的检测位置，则控制打印纸驱动单元驱动打印纸沿第一方向移动距离L1+H，其中，第一方向为由标记传感器至打印头的方向。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，控制器还设置为通过以下打印位置校正方法校正得到打印位置偏差补偿值：在打印机上安装参考颜色的色带之后，控制打印头在打印纸上打印第一标识和校正定位标记，其中，第一标识的起始位置和校正定位标记的起始位置在打印纸上的距离为第二距离L2；在打印纸的进纸过程中，通过标记传感器检测校正定位标记，判断校正定位标记是否到达标记传感器的检测位置；并在判断出校正定位标记到达标记传感器的检测位置时，控制打印纸驱动单元驱动打印纸退纸，其中，打印纸的退纸距离为第一距离L1和第二距离L2的和；控制打印头在打印纸上打印第二标识；以及获取第一标识和第二标识沿打印纸的输送方向的间隔距离，并将间隔距离作为打印位置偏差补偿值。
可选的，标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，控制器还设置为通过以下打印位置校正方法校正得到打印位置偏差补偿值：在打印机上安装参考颜色的色带之后，控制打印头在打印纸上打印校正定位标记；在打印纸的进纸过程中，通过标记传感器检测校正定位标记，判断校正定位标记是否到达标记传感器的检测位置；在判断出校正定位标记到达标记传感器的检测位置时，控制打印纸驱动单元驱动打印纸退纸，其中，打印纸的退纸距离为第一距离L1；控制打印头在打印纸上打印第二标识；以及获取校正定位标记和第二标识沿打印纸的输送方向的间隔距离，并将间隔距离作为打印位置偏差补偿值。
可选的，打印机还包括存储器，存储器设置为存储通过打印位置校正方法得到的打印位置偏差补偿值，控制器还设置为判断打印机所安装的参考颜色的色带是否发生变化，并在判断出打印机所安装的参考颜色的色带发生变化时，通过打印位置校正方法重新校正得到打印位置偏差补偿值，在判断出打印机所安装的参考颜色的色带未发生变化时，从存储器中读取打印位置偏差补偿值。
通过本申请，在使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容，在使用第i颜色的色带执行打印时，根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，然后打印第i打印内容中第一页面的打印内容，解决了相关技术的打印机在打印彩色页面时所存在的图像套印不准确的问题，进而提高了在打印彩色页面时的图像套印的准确性。
附图说明
构成本申请的一部分的附图用来提供对本申请的理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是相关技术中在打印纸上打印的定位标记经过固定设置的光电传感器时，光电传感器输出的电信号的波形示意图；
图2是根据本申请第一实施例的热转印打印机的模块组成示意图；
图3是根据本申请第一实施例的热转印打印机的结构示意图；
图4是根据本申请第一实施例的热转印打印机的结构局部放大示意图；
图5A是根据本申请第一实施例的热转印打印机的控制方法的流程图；
图5B是根据本申请第二实施例的热转印打印机的控制方法的流程图；
图6是根据本申请实施例的热转印打印机的打印位置校正方法的流程图；
图7是根据本申请实施例的第一标识与第一定位标记的打印方式的示意图；
图8A至图8C是根据本申请实施例的第一标识和第一定位标记打印完成后，打印纸在打印通道中的位置变化的理论情况示意图；
图9为根据本申请实施例的第二标识与第一标识以及第一定位标记的打印方式的示意图；以及
图10是根据本申请实施例的第一标识和第二标识的实际相对位置示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其他步骤或单元。
图2是根据本申请第一实施例的热转印打印机的模块组成示意图，如图所示，打印机1包括控制器10、通信单元11、RAM存储器12、Flash存储器13、打印单元14、色带收发单元15、打印头升降单元16和标记传感器17。
控制器10设置为控制其他各模块执行工作及进行数据的计算和处理，比如， 控制通信单元11执行打印机1与打印请求装置(比如计算机)之间的数据传输以及控制打印单元14执行图像打印等。
通信单元11设置为执行打印机1与打印请求装置之间的数据传输，比如，通信单元11接收打印请求装置发送的打印控制命令和打印数据。
RAM存储器12，包括接收缓冲区121、打印缓冲区122和临时缓冲区123，其中，接收缓冲区121设置为存储通信单元11接收的打印控制命令和打印数据，打印缓冲区122设置为存储要发送到打印单元14的打印头142的点阵数据，其中，该点阵数据是控制器10对接收缓冲区121中存储的打印数据进行计算处理后生成的，临时缓冲区123设置为缓存打印机1的控制程序运行过程中生成的数据和变量，比如，临时缓冲区123设置为缓存通过打印位置校正方法校正得到的打印位置偏差补偿值。
Flash存储器13设置为存储打印机1的控制程序以及程序运行过程中需要的固定值，其中，固定值包括第一预设阈值T1、第一距离L1和第二距离L2，其中，第一预设阈值T1用于判断打印纸上的定位标记是否位于标记传感器17的检测位置，第一距离L1为标记传感器17的检测位置与打印头142的打印位置之间的距离，第二距离L2为第一标识的起始位置和校正定位标记的起始位置在打印纸上的距离。Flash存储器13还可以设置为存储通过打印位置校正方法校正得到的打印位置偏差补偿值。
打印单元14，设置为在打印纸表面打印图像。打印单元14包括打印头控制器141、打印头142、辊轮143和打印纸驱动单元144，其中，打印头控制器141设置为根据控制器10输出的控制信号以及打印缓冲区122中存储的点阵数据输出打印头142的驱动信号，打印头142与辊轮143在打印通道中相切设置，打印纸和色带从二者之间穿过，且色带位于打印头142和打印纸之间，色带的油墨层与打印纸接触，打印头142包括沿打印纸宽度方向(即与打印纸的输送方向相垂直的方向)等距排列成一行的多个发热体，打印头142的发热体根据打印头驱动器141发送的驱动信号发热，使色带的油墨层上的染料转印到打印纸上，在打印纸上形成图像。打印纸驱动单元144包括打印纸电机驱动器1441、打印纸电机1442和打印纸驱动辊1443，打印纸电机驱动器1441设置为根据控制器10输出的控制信号向打印纸电机1442提供工作电流，以驱动打印纸电机1442的输出轴转动，打印纸电机1442的输出轴与辊轮143、打印纸驱动辊1443传动连接，当打印纸电机 1442的输出轴转动时，辊轮143和打印纸驱动辊1443随之转动，从而驱动打印纸在打印通道中移动。
色带收发单元15设置为发放及回收色带。色带收发单元15包括色带发放轴151、色带回收轴152和色带驱动单元153，其中，色带发放轴151用于支撑未使用的色带，色带回收轴152用于支撑使用后的色带，未使用的色带由色带发放轴151引出，从打印头142和辊轮143之间穿过后缠绕到色带回收轴152上，色带驱动单元153设置为驱动色带发放轴151和/或色带回收轴152转动。可选的，色带驱动单元153包括色带发放电机驱动器1531、色带发放电机1532、色带回收电机驱动器1533和色带回收电机1534。色带发放电机驱动器1531设置为根据控制器10输出的控制信号向色带发放电机1532提供工作电流，以驱动色带发放电机1532的输出轴转动，色带发放电机1532的输出轴与色带发放轴151传动连接，色带发放电机1532的输出轴转动时色带发放轴151随之转动以将未使用的色带从色带发放轴151上发放；色带回收电机驱动器1533设置为根据控制器10输出的控制信号向色带回收电机1534提供工作电流，以驱动色带回收电机1534的输出轴转动，色带回收电机1534的输出轴与色带回收轴152传动连接，色带回收电机1534的输出轴转动时色带回收轴152随之转动以将使用后的色带回收至色带回收轴52。
打印头升降单元16，设置为抬起或压下打印头142，使打印头142与辊轮143相切或分离。打印头升降单元16包括凸轮161、凸轮电机驱动器162和凸轮电机163，其中，凸轮电机驱动器162设置为根据控制器10输出的控制信号向凸轮电机163提供工作电流，以驱动凸轮电机163的输出轴转动，凸轮电机163的输出轴与凸轮161传动连接，凸轮161与打印头142的固定板配合，凸轮电机163驱动凸轮161转动不同的设定角度，使打印头142位于抬起或压下位置。
标记传感器17设置为检测打印纸的标记部分是否到达标记传感器17的检测位置，标记传感器17为反射传感器或透射传感器，本实施例中，标记传感器17为反射传感器，包括光发生器和光接收器，光发生器和光接收器设置在打印通道中，二者分别与控制器10电连接，光发生器在控制器10提供的驱动电流的作用下，发射具有一定强度的光线，光线被打印纸的标记部分或打印纸的非标记部分反射后被光接收器接收，光接收器将接收的光信号转换为电信号，并将该电信号输送至控制器10，由于打印纸的标记部分和打印纸的非标记部分的反射率不同，因此，当光发生器发出的光照射在打印纸的标记部分或打印纸的非标 记部分时，光接收器接收到的光强度不同，输出不同的检测信号至控制器10。比如，当打印纸的标记部分位于标记传感器17的检测位置时，标记传感器17的光接收器输出第一检测信号，当打印纸的非标记部分位于标记传感器17的检测位置时，标记传感器17的光接收器输出第二检测信号，当控制器10判定标记传感器17的光接收器输出的检测信号由第二检测信号变化为第一检测信号时，判定打印纸的标记部分到达标记传感器17的检测位置。
图3是根据本申请第一实施例的热转印打印机的结构示意图，如图所示，打印机包括色带支架2和基座3，其中，色带支架2与基座3枢接，可以相对于基座3打开或闭合。打印单元14的打印头142与打印头固定板1421固定连接，打印头固定板1421与色带支架2活动连接，辊轮143由基座3支撑，可以绕自身轴线转动，当色带支架2相对于基座3闭合时，打印头142和辊轮143在打印通道中相切，其中，二者的切线在打印通道中的位置为打印头142的打印位置。
色带收发单元15的色带发放轴151和色带回收轴152均位于色带支架2的背离打印头142的一侧，由色带支架2支撑，当色带支架2相对于基座3闭合时，色带发放轴151和色带回收轴152的轴线与辊轮143的轴线平行。
安装色带20时，使色带支架2相对于基座3打开，未使用的色带卷由色带发放轴151支撑，拉动色带20的起始端使色带20绕过打印头142后缠绕在色带回收轴152上。纸卷30由纸卷支撑轴31支撑，打印纸21从纸卷30引出，覆盖在辊轮143表面，当使色带支架2相对基座3闭合后，打印纸21位于色带20和打印胶辊143之间，色带20的油墨层与打印纸21接触。
打印时，打印纸电机1442转动，驱动辊轮143和打印纸驱动辊1443正向转动(图3中顺时针方向)使打印纸21向下游(如图中箭头40所示方向)移动，色带发放电机1532驱动色带发放轴151转动，色带回收电机1534驱动色带回收轴152转动，使色带20由色带发放轴151向色带回收轴152输送，打印头142的发热体受控发热使色带20的油墨层上的染料转印至打印纸21上，形成设定的图像。
打印头升降单元16的凸轮电机163与基座3固定连接，凸轮161与凸轮电机163传动连接，并与打印头固定板1421配合，当凸轮电机163驱动凸轮161转动不同的设定角度时，利用凸轮161与打印头固定板1421的配合位置发生变化，驱动打印头固定板1421相对色带支架2运动，使得打印头142位于抬起或压下位置，当打印头142位于压下位置时，打印头142与辊轮143相切配合，当打印头142位 于抬起位置时，打印头142与辊轮143分离。
图4是根据本申请第一实施例的热转印打印机的结构局部放大示意图，如图所示，沿打印纸输送方向，标记传感器17位于打印头142的下游，标记传感器17的检测位置与打印头142的打印位置之间的距离为L1。
图5A是根据本申请第一实施例的热转印打印机的控制方法的流程图，如图所示，该方法包括以下步骤：
S21，使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容。
在打印纸上打印一个或多个页面的内容，第一定位标记用于标记打印纸上的第一页面的位置，第一页面为在打印纸上打印的任意一个页面，第一打印内容为使用参考颜色的色带打印的内容。
在打印机上安装参考颜色的色带之后，使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容。
本申请实施例的打印机包括用于在打印纸上执行打印的打印头，驱动打印纸在打印通道中移动的打印纸驱动单元和用于检测打印纸上的定位标记的标记传感器，打印机在控制打印头使用参考颜色的色带执行打印时，在打印纸上打印第一定位标记和第一打印内容。
S22，使用第i颜色的色带执行打印时，根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，打印第i打印内容中第一页面的打印内容。
打印位置偏差补偿值为标记传感器检测到第一定位标记到达标记传感器的检测位置时，第一定位标记的起始位置与标记传感器的检测位置之间的距离，第i颜色为除参考颜色之外的颜色，第i打印内容为使用第i颜色的色带打印的内容。
打印位置偏差补偿值可以是通过本申请实施例的打印位置校正方法校正得到的打印位置偏差补偿值，也可以是预先存储的打印位置偏差补偿值，在根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置之前，可以是从RAM存储器12中读取缓存的打印位置偏差补偿值，也可以是从Flash存储器13中读取存储的打印位置偏差补偿值。
在打印机上安装第i颜色的色带之后，可以使用第i颜色的色带执行打印。在使用第i颜色的色带执行打印时，先检测打印纸上的第一定位标记，然后根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，打印第i打印内容中第一页面的打印内容。
打印机在控制打印头使用第i颜色的色带执行打印时，先获取打印位置偏差补偿值并通过标记传感器检测第一定位标记，然后根据第一定位标记和打印位置偏差补偿值控制打印纸驱动单元将第一页面的起始位置输送至打印头的打印位置，控制打印头在打印纸的第一页面上打印第i打印内容中第一页面的打印内容。
标记传感器的检测位置和打印头的打印位置之间的距离为第一距离L1，打印位置偏差补偿值为H，在根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置时，首先检测第一定位标记是否到达标记传感器的检测位置，在检测到第一定位标记到达标记传感器的检测位置时，控制打印纸沿第一方向移动距离L1+H，从而确定第一页面的起始位置输送至打印头的打印位置，其中，第一方向为由标记传感器至打印头的方向。
该实施例在使用第i颜色的色带执行打印时，根据第一定位标记和打印位置偏差补偿值将第一页面的起始位置输送至打印头的打印位置，然后打印第i打印内容中第一页面的打印内容，提高了在打印彩色页面时的图像套印的准确性。
图5B是根据本申请第二实施例的热转印打印机的控制方法的流程图，该实施例可以作为图5A所示实施例的一种可选实施方式，如图5B所示，该实施例的方法包括以下步骤：
S31，使用参考颜色的色带进行打印位置校正。
执行本步骤前，用户在打印机上安装参考颜色的单色色带，并将缠绕有空白打印纸的纸卷安装到打印纸支撑机构上，拉动打印纸的前端(即纸头)，使纸头由纸卷引出后经过打印头以及标记传感器在打印通道中展开，用户压下色带支架使色带支架相对于基座闭合，以使打印机可以使用参考颜色的色带执行本步骤的打印位置校正。
如图6所示，打印位置校正方法包括以下步骤：
S311，打印第一标识及打印校正定位标记。
控制器控制打印头升降单元压下打印头，使打印头和辊轮配合，并控制打印单元在打印纸上打印第一标识以及校正定位标记，其中，校正定位标记与标记传感器位置对应，打印纸在打印通道中输送时校正定位标记经过标记传感器，第一标识的起始位置和校正定位标记的起始位置在打印纸上的距离为第二距离L2。校正定位标记是在执行打印位置校正时在打印纸上打印的定位标记。
图7是根据本申请实施例的第一标识与校正定位标记的打印方式的示意图，如图所示，执行打印时，打印纸21沿箭头50所示方向在打印通道70中进纸，第一标识61为灰度块，且第一标识位于打印纸21的第一侧，可选的，第一侧为打印纸的左侧，沿打印纸进纸方向，校正定位标记62在打印纸上位于第一标识61的后方，第一标识61的起始位置611和校正定位标记62的起始位置621在打印纸上的距离为第二距离L2。
S312，检测校正定位标记，并基于检测到的校正定位标记将第一标识的起始位置输送至打印头的打印位置。
控制器控制打印纸驱动单元驱动打印纸进纸，打印纸进纸过程中控制器检测校正定位标记，并基于检测到的校正定位标记将第一标识的起始位置611输送至打印头的打印位置。包括：控制器控制打印头升降单元抬起打印头，使打印头和辊轮分离。然后，控制器控制打印纸驱动单元驱动打印纸进纸，打印纸进纸过程中检测校正定位标记是否到达标记传感器的检测位置，控制器通过将标记传感器输出的检测信号与第一预设阈值T1进行比较，判断校正定位标记是否到达标记传感器的检测位置，比如，当标记传感器输出的检测信号大于第一预设阈值T1时，判定校正定位标记没有位于标记传感器的检测位置，当标记传感器输出的检测信号小于等于第一预设阈值T1时，判定校正定位标记位于标记传感器的检测位置，当标记传感器输出的检测信号到达第一预设阈值T1时，控制器判定校正定位标记到达标记传感器的检测位置，此时，控制器控制打印纸驱动单元停止驱动打印纸进纸，并控制打印纸驱动单元驱动打印纸退纸，退纸过程中控制器记录打印纸移动的距离，当控制器记录到打印纸移动的距离为第一距离L1和第二距离L2之和时，控制打印纸驱动单元停止驱动打印纸退纸，此时，控制器控制打印头升降单元压下打印头，使打印头和辊轮配合。
图8A至图8C是根据本申请实施例的第一标识和校正定位标记打印完成后，打印纸在打印通道中的位置变化的理论情况示意图，如图所示，沿打印纸21的 进纸方向(箭头50所示方向)，标记传感器的检测位置71位于打印头的打印位置72的下游，且二者之间的距离为第一距离L1，打印机执行打印过程中，打印纸21在打印通道70中移动，如图8A所示，打印机执行完S311的校正定位标记62打印后，校正定位标记62的结束位置622位于打印头的打印位置72，打印纸驱动单元驱动打印纸进纸，打印纸21沿箭头50所示方向在打印通道70中移动，当控制器判定校正定位标记62到达标记传感器的检测位置71时，理论上，如图8B所示，校正定位标记62的起始位置621位于标记传感器的检测位置71，此时，控制器控制打印纸驱动单元停止驱动打印纸进纸，并控制打印纸驱动单元驱动打印纸退纸，如图8C所示，打印纸21沿箭头51所示方向在打印通道70中移动，如上所述，第一距离L1为打印头的打印位置72与标记传感器的检测位置71之间的距离，第二距离L2为第一标识61的起始位置611和校正定位标记的起始位置621在打印纸上的距离，因此，当打印纸的退纸距离等于第一距离L1和第二距离L2之和时，理论情况下，如图8C所示，第一标识61的起始位置611位于打印头的打印位置72。
S313，打印第二标识。
控制器控制打印单元在打印纸上打印第二标识，图9为根据本申请实施例的第二标识与第一标识以及校正定位标记的打印方式的示意图，如图所示，第二标识63为灰度块，且第二标识位于打印纸21的第二侧，可选的，第二侧为打印纸的右侧。
由图8A至图8C可知，打印纸驱动单元驱动打印纸进纸过程中，当校正定位标记的起始位置到达标记传感器的检测位置时，如果控制器可以立刻判定校正定位标记到达标记传感器的检测位置，也即，标记传感器输出的检测信号的值可以立刻到达第一预设阈值T1，此时，当打印纸驱动单元驱动打印纸退纸第一距离L1和第二距离L2之和时，打印纸的第一标识的起始位置到达打印头的打印位置；当打印单元打印第二标识后，第二标识的起始位置与第一标识的起始位置相同，也即，第一标识和第二标识沿打印纸输送方向的间隔距离为零。然而，由图1可知，从校正定位标记的起始位置到达标记传感器的检测位置时刻到标记传感器输出的检测信号到达第一预设阈值T1需要一定的时间，因此，实际情况下，第一标识和第二标识沿打印纸输送方向的间隔距离不为零。
图10是根据本申请一实施例的第一标识和第二标识的实际相对位置示意图，由于当控制器判定校正定位标记62到达标记传感器的检测位置71时，校正 定位标记62的起始位置621已经经过标记传感器的检测位置71，此时，打印纸驱动单元驱动打印纸退纸，打印纸21沿箭头51所示方向在打印通道70中移动，当打印纸的退纸距离到达第一距离L1和第二距离L2之和时，第一标识61的起始位置611还没有到达打印头的打印位置72，此时，如图10所示，打印单元打印第二标识63后，第二标识63的起始位置631与第一标识61的起始位置611沿打印纸输送方向存在一定的间隔距离H。由于当校正定位标记的起始位置到达标记传感器的检测位置时，如果控制器可以立刻判定校正定位标记到达标记传感器的检测位置，当打印纸的退纸距离到达第一距离L1和第二距离L2之和时，第一标识61的起始位置611恰好到达打印头的打印位置72，也即，这种情况下间隔距离H的值为零，因此，间隔距离H是由于控制器判定校正定位标记到达标记传感器的检测位置时，校正定位标记的起始位置已经经过标记传感器的检测位置造成的，由图8A至图8C以及图10可知，距离H的值实际上为控制器判定校正定位标记到达标记传感器的检测位置时，校正定位标记的起始位置与标记传感器的检测位置之间的距离。
S32，获取并保存位置偏差补偿值。
打印机获取第一标识和第二标识沿打印纸输送方向的间隔距离，并将该距离作为位置偏差补偿值存储到Flash存储器中。打印机的用户可以通过人工测量的方法测量获得第一标识和第二标识沿打印纸输送方向的间隔距离，也可以通过图像采集设备采集打印纸上的打印图像，计算机根据采集的打印图像分析运算的方式获得第一标识和第二标识沿打印纸输送方向的间隔距离，打印机的用户将所获得的第一标识和第二标识沿打印纸输送方向的间隔距离通过通信单元发送到打印机。
需要说明的是，进行打印位置校正时，第一标识、第二标识以及校正定位标记的打印方式不限于本实施例所描述的方法，可选的，可以直接使用校正定位标记作为第一标识，控制器控制打印单元打印完校正定位标记后，控制打印纸驱动单元驱动打印纸进纸，当判定校正定位标记到达标记传感器的检测位置后，控制打印纸驱动单元驱动打印纸退纸，将校正定位标记的起始位置输送至打印头的打印位置，然后打印第二标识。当直接使用校正定位标记作为第一标识时，L2的值为零。
S33，执行彩色页面套印，其中，当使用除参考颜色的色带以外的其他颜色 的色带打印时，根据位置偏差补偿值将每个页面的起始位置输送至打印头的打印位置。
打印机依次使用不同颜色的单色色带进行彩色页面图像打印，其中，当接收到使用参考颜色的色带执行打印的控制命令时，在打印纸上打印定位标记及第一打印内容；当接收到使用第i种颜色的色带执行打印的控制命令时，检测打印纸上已打印的定位标记，并基于检测到的每个页面的定位标记以及位置偏差补偿值将每个页面的起始位置输送至打印头的打印位置，以及打印第i打印内容，其中，i为正整数且2≤i≤N，N为需要打印的彩色页面中所包含的颜色种类的总数，第一打印内容为使用参考颜色的色带所打印的内容，第i打印内容为使用第i种颜色的色带所打印的内容。
可选的，当接收到使用参考颜色的色带执行打印的控制命令时，控制器通过记录打印纸移动的距离确定要打印的每个页面的起始位置，并使用参考颜色的色带在每个页面的起始位置打印定位标记，以及在每个页面内打印设定图像，当接收到使用第i种颜色的色带执行打印的控制命令时，在打印每个页面的图像前，控制器首先通过检测标记传感器输出的检测信号将每个页面的起始位置，也即定位标记在打印纸上的起始位置输送至标记传感器的检测位置，然后，控制打印纸驱动单元驱动打印纸退纸距离(L1+H)，将页面的起始位置输送至打印头的打印位置，最后控制打印单元在页面内打印设定图像。由于当控制器判定定位标记到达标记传感器的检测位置时，定位标记的起始位置已经经过标记传感器的检测位置，且二者之间的距离为H，因此，此时，驱动打印纸退纸距离(L1+H)后，定位标记的起始位置恰好到达打印头的打印位置，当在页面内使用第i种颜色的色带打印设定的图像时，使用第i种颜色的色带打印的图像可以与使用参考颜色的色带打印的图像按预定的位置关系套印。
需要说明的是，当进行打印位置校正并存储位置偏差补偿值之后，打印机每使用N种颜色的色带执行一次图像套印时，如果打印机所安装的参考颜色的色带不变时，打印机可以直接从Flash存储器中获取已存储的位置偏差补偿值，进行下一次图像套印。
当打印不同的彩色页面时，根据实际需要，用户在每次执行图像套印时，可能安装不同颜色的色带作为参考颜色的色带，这就会导致所打印的定位标记的颜色发生变化。由于定位标记的颜色不同，定位标记的光学特性(透光率或 反光率)也会不同，标记传感器检测定位标记时输出的电信号就会存在差异，这就会导致当使用不同颜色的色带打印定位标记时，当打印机检测定位标记时，从定位标记的起始位置到达标记传感器的检测位置时刻到打印机的控制器判定定位标记到达标记传感器的检测位置时刻之间的时间间隔不同，从而导致参考颜色的色带不同时，通过检测到的定位标记确定的页面的起始位置与安装参考颜色的色带时确定的页面的起始位置存在的误差不同，因此，可选的，当打印机所安装的参考颜色的色带发生变化时，打印机执行图5B所示控制方法，使用参考颜色的色带进行打印位置校正，获取并保存位置偏差补偿值，并基于所获取的位置偏差补偿值进行彩色页面的套印，这样，无论使用哪种颜色作为参考颜色，都能实现其他颜色套印精确。
本申请实施例的热转印打印机及其控制方法，在进行图像套印前，通过安装参考颜色的色带进行打印位置校正获取位置偏差补偿值，在进行图像套印时，当使用其他颜色的色带打印时，基于位置偏差补偿值进行打印位置调整。通过本申请实施例的热转印打印机及其控制方法，可以有效解决相关技术的打印机在打印彩色页面时所存在的图像套印不准确的问题。
以上所述仅为本申请的可选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。

Claims (10)

  1. 一种打印机的控制方法，包括：
    使用参考颜色的色带执行打印时，在所述打印纸上打印第一定位标记和第一打印内容，其中，所述第一定位标记用于标记所述打印纸上的第一页面的位置，所述第一打印内容为使用所述参考颜色的色带打印的内容；以及
    使用第i颜色的色带执行打印时，先检测所述打印纸上的第一定位标记，然后根据所述第一定位标记和打印位置偏差补偿值将所述第一页面的起始位置输送至所述打印头的打印位置，打印所述第i打印内容中所述第一页面的打印内容；
    其中，所述打印机包括标记传感器和打印头，所述标记传感器用于检测打印纸上的定位标记，所述打印头用于在所述打印纸上执行打印，所述打印位置偏差补偿值为所述标记传感器检测到所述第一定位标记到达所述标记传感器的检测位置时，所述第一定位标记的起始位置与所述标记传感器的检测位置之间的距离，所述第i颜色为除所述参考颜色之外的颜色，所述第i打印内容为使用所述第i颜色的色带打印的内容。
  2. 根据权利要求1所述的方法，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述打印位置偏差补偿值为H，所述根据所述第一定位标记和所述打印位置偏差补偿值将所述第一页面的起始位置输送至所述打印头的打印位置包括：
    在所述打印纸的输送过程中，检测所述第一定位标记是否到达所述标记传感器的检测位置；以及
    如果检测到所述第一定位标记到达所述标记传感器的检测位置，则控制所述打印纸沿第一方向移动距离L1+H，其中，所述第一方向为由所述标记传感器至所述打印头的方向。
  3. 根据权利要求1所述的方法，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述打印位置偏差补偿值通过以下打印位置校正方法校正得到：
    在打印机上安装参考颜色的色带之后，在所述打印纸上打印第一标识和校正定位标记，其中，所述第一标识的起始位置和所述校正定位标记的起始位置在所述打印纸上的距离为第二距离L2；
    在所述打印纸的进纸过程中，检测所述校正定位标记，判断所述校正定位标记是否到达所述标记传感器的检测位置；
    如果判断出所述校正定位标记到达所述标记传感器的检测位置，则控制所述打印纸退纸，其中，所述打印纸的退纸距离为所述第一距离L1和所述第二距离L2的和；
    在所述打印纸上打印第二标识；以及
    获取所述第一标识和所述第二标识沿所述打印纸的输送方向的间隔距离，并将所述间隔距离作为所述打印位置偏差补偿值。
  4. 根据权利要求1所述的方法，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述打印位置偏差补偿值通过以下打印位置校正方法校正得到：
    在打印机上安装参考颜色的色带之后，在所述打印纸上打印所述校正定位标记；
    在所述打印纸的进纸过程中，检测所述校正定位标记，判断所述校正定位标记是否到达所述标记传感器的检测位置；
    如果判断出所述校正定位标记到达所述标记传感器的检测位置，则控制所述打印纸退纸，其中，所述打印纸的退纸距离为所述第一距离L1；
    在所述打印纸上打印第二标识；以及
    获取所述校正定位标记和所述第二标识沿所述打印纸的输送方向的间隔距离，并将所述间隔距离作为所述打印位置偏差补偿值。
  5. 根据权利要求3或4所述的方法，其中，所述打印机还包括存储器，所述存储器用于存储所述打印位置偏差补偿值，在通过所述打印位置校正方法得到所述打印位置偏差补偿值之后，将所述打印位置偏差补偿值存储至所述存储器中，在获取所述打印位置偏差补偿值时，所述方法还包括：
    判断所述打印机所安装的参考颜色的色带是否发生变化；
    如果判断出所述打印机所安装的参考颜色的色带发生变化，则通过所述打印位置校正方法重新校正得到所述打印位置偏差补偿值；以及
    如果判断出所述打印机所安装的参考颜色的色带未发生变化，则从所述存储器中读取所述打印位置偏差补偿值。
  6. 一种打印机，包括：
    打印头，设置为在打印纸上执行打印；
    打印纸驱动单元，设置为驱动所述打印纸在打印通道中移动；
    标记传感器，设置为检测所述打印纸上的定位标记，包括检测所述打印纸 上的第一定位标记，其中，所述第一定位标记用于标记所述打印纸上的第一页面的位置；以及
    控制器，设置为在控制所述打印头使用参考颜色的色带执行打印时，在所述打印纸上打印第一定位标记和第一打印内容，在控制所述打印头使用第i颜色的色带执行打印时，先通过所述标记传感器检测所述第一定位标记，然后根据所述第一定位标记和打印位置偏差补偿值控制所述打印纸驱动单元将所述第一页面的起始位置输送至所述打印头的打印位置，打印所述第i打印内容中所述第一页面的打印内容，其中，所述第一打印内容为使用所述参考颜色的色带打印的内容，所述打印位置偏差补偿值为所述标记传感器检测到所述第一定位标记到达所述标记传感器的检测位置时，所述第一定位标记的起始位置与所述标记传感器的检测位置之间的距离，所述第i颜色为除所述参考颜色之外的颜色，所述第i打印内容为使用所述第i颜色的色带打印的内容。
  7. 根据权利要求6所述的打印机，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述打印位置偏差补偿值为H，所述控制器设置为通过以下方法根据所述第一定位标记和所述打印位置偏差补偿值将所述第一页面的起始位置输送至所述打印头的打印位置：
    在所述打印纸的输送过程中，根据所述标记传感器输出的检测信号判断所述第一定位标记是否到达所述标记传感器的检测位置；以及
    如果判断出所述第一定位标记到达所述标记传感器的检测位置，则控制所述打印纸驱动单元驱动所述打印纸沿第一方向移动距离L1+H，其中，所述第一方向为由所述标记传感器至所述打印头的方向。
  8. 根据权利要求6所述的打印机，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述控制器还设置为通过以下打印位置校正方法校正得到所述打印位置偏差补偿值：在所述打印机上安装参考颜色的色带之后，控制所述打印头在所述打印纸上打印第一标识和校正定位标记，其中，所述第一标识的起始位置和所述校正定位标记的起始位置在所述打印纸上的距离为第二距离L2；在所述打印纸的进纸过程中，通过所述标记传感器检测所述校正定位标记，判断所述校正定位标记是否到达所述标记传感器的检测位置；并在判断出所述校正定位标记到达所述标记传感器的检测位置时，控制所述打印纸驱动单元驱动所述打印纸退纸，其中，所述打印纸的退纸距离为所述第一距离L1和所述第二距离L2的和；控制所述打印头在所述打印纸上 打印第二标识；以及获取所述第一标识和所述第二标识沿所述打印纸的输送方向的间隔距离，并将所述间隔距离作为所述打印位置偏差补偿值。
  9. 根据权利要求6所述的打印机，其中，所述标记传感器的检测位置和所述打印头的打印位置之间的距离为第一距离L1，所述控制器还设置为通过以下打印位置校正方法校正得到所述打印位置偏差补偿值：在所述打印机上安装参考颜色的色带之后，控制所述打印头在所述打印纸上打印所述校正定位标记；在所述打印纸的进纸过程中，通过所述标记传感器检测所述校正定位标记，判断所述校正定位标记是否到达所述标记传感器的检测位置；在判断出所述校正定位标记到达所述标记传感器的检测位置时，控制所述打印纸驱动单元驱动所述打印纸退纸，其中，所述打印纸的退纸距离为所述第一距离L1；控制所述打印头在所述打印纸上打印第二标识；以及获取所述校正定位标记和所述第二标识沿所述打印纸的输送方向的间隔距离，并将所述间隔距离作为所述打印位置偏差补偿值。
  10. 根据权利要求8或9所述的打印机，所述打印机还包括存储器，所述存储器设置为存储通过所述打印位置校正方法得到的所述打印位置偏差补偿值，所述控制器还设置为判断所述打印机所安装的参考颜色的色带是否发生变化，并在判断出所述打印机所安装的参考颜色的色带发生变化时，通过所述打印位置校正方法重新校正得到所述打印位置偏差补偿值，在判断出所述打印机所安装的参考颜色的色带未发生变化时，从所述存储器中读取所述打印位置偏差补偿值。
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