JP2011213016A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer enabling high-speed printing by performing thermal history control in which current carrying correction is additionally performed with respect to a thermal head.SOLUTION: With respect to each heating element 41A constituting a line head of the thermal head, only when a next application period F wherein main pulse MP for main heating is applied for color development of a printing medium follows immediately after a current application period F wherein color development of the printing medium is not achieved, sub pulse SP for compensating the main pulse MP to be applied within the next application period F is applied within the current application period F. In accordance with change in application pulse width WS of the sub pulse SP applied to a second heating element 41D based on detected environment data, a ratio of application pulse widths WR, WC of rectangular pulse RP and chopping pulse CP constituting the main pulse MP applied to a first heating element 41C is changed.

Description

  The present invention relates to a printing apparatus equipped with a thermal head.

  In the temperature control for each heating element constituting the thermal head, a heating time for applying a main pulse to heat the heating element and perform printing within an application cycle in which one print dot is formed on the print medium; There is a non-heating time for cooling the heated heating element.

  However, when starting printing or forming isolated print dots on the print medium even during printing, even if the heating element is heated by the application of the main pulse, part of the heat escapes to the vicinity of the heating element. As a result, the heat generation is insufficient.

  Further, even if the heating element is heated by the application of the main pulse, if the heating element adjacent to the heated heating element does not perform printing, the heat of the heating element heated by the heating element that does not perform printing is In the same way, the fever becomes scarce because it escapes.

  Further, even when the heating element is heated by application of the main pulse, when the heating element is not heated within the immediately preceding application cycle, compared to when the heating element is heated within the immediately preceding application cycle, When the application of the main pulse is started, the temperature of the heat generating element is low, and the temperature rise of the heat generating element is delayed, so that heat generation is insufficient.

  Therefore, in the application cycle in which these cases apply, a sub-pulse for assisting heating of the heating element is applied in order to compensate for the shortage of heat generation. The auxiliary heating time by the sub-pulse is added immediately after the heating time by the main pulse (see, for example, Patent Document 1 below).

  Therefore, the heating time by the main pulse, the heating time by the sub-pulse, and the non-heating time may be included in one application cycle.

JP 7-137327 A

  However, as the printing speed is increased, the application period is shortened accordingly, so that the shorter the application period, the more suitable the heating time by the main pulse and sub pulse for the shorter application period. It becomes difficult to let you.

  As a normal solution, each heating time by the main pulse or sub pulse may be shortened corresponding to the shortened application period. This solves the temporal aspect, but in order to heat the heating element so that the heat generation amount does not become insufficient with the shortened heating time, the applied voltage is increased or the heating element of the thermal head is heated. It is necessary to reduce the resistance value and increase the current flowing through the heating element of the thermal head. For this purpose, it is required to improve the withstand voltage and current capacity of the IC constituting the drive circuit of the thermal head.

  Another solution is to improve the efficiency of transferring the heat generated by the heating element of the thermal head to the print medium. For this purpose, it is required to improve the heat transfer performance with respect to the print medium in the thin film portion of the thermal head including the heating element.

  However, in any of the solutions, since it is beyond the framework of studies that are normally performed, as a result, an increase in cost cannot be avoided.

  Therefore, even if these solutions cannot be taken, if an attempt is made to increase the printing speed, the application cycle must be shortened, and within the shortened application cycle, it is necessary for printing. In order to secure the heat generation amount, the proportion of each heating time by the main pulse and sub-pulse must be increased, and the proportion of the non-heating time inevitably decreases. For this reason, the time for cooling the heating element of the thermal head that has been raised in temperature is shortened. Therefore, when printing continues, heat storage occurs and the temperature rise of the heating element of the thermal head cannot be suppressed. Troubles in print quality such as "tail".

  Therefore, the present invention has been made in view of the above-described points, and provides a printing apparatus that enables high-speed printing by performing thermal history control in which a new energization correction is performed on a thermal head. Is an issue.

  In order to solve this problem, the invention according to claim 1 is directed to a thermal head provided with a line head in which a plurality of heating elements are linearly arranged, and a sub-scanning in which the line head of the thermal head is orthogonal. And a control device for controlling the transport device and the thermal head, wherein the control device has a line head of the thermal head for each continuous application cycle. Printing is performed by forming printing dots on a printing medium conveyed by the conveying device in the sub-scanning direction of the thermal head by performing an application process for selectively heating each heating element constituting the In each of the application cycles, the print medium is colored in order to form continuous print dots on the print medium in the sub-scanning direction of the thermal head. The main pulse for main heating is a fixed time from the main heating start time to the next main heating start time, which is started by the line head of the thermal head. For each heating element constituting the line head of the thermal head, sub-pulses that are auxiliary heating that can cause coloration of the print medium by supplementing the main heating by the main pulse applied within the next application cycle are not allowed. The following (1) and (2) are limited, and (1) immediately after the current application cycle in which the print medium is not colored, the next application cycle in which the main pulse for main heating for coloring the print medium is applied continues. And applying a sub-pulse within the current application cycle that does not cause the print medium to develop color. (2) Each of the generators constituting the line head of the thermal head. Within the application cycle in which the application process for selectively heating the element is performed, the first heating element that performs the main heating among the heating elements constituting the line head of the thermal head becomes the main heating. Application of the main pulse for auxiliary heating starts at the end of main heating when the application of the main pulse ends and the second heating element that performs auxiliary heating among the heating elements constituting the line head of the thermal head. It is performed under the condition that the auxiliary heating start time coincides.

  The invention according to claim 2 is the printing apparatus according to claim 1, wherein the control device is not capable of coloring the print medium by single application but is based on a main pulse applied within the next application cycle. In addition to the following restrictions (1) and (2) for each heating element constituting the thermal head line head, the application of sub-pulses serving as auxiliary heating that can color the print medium by supplementing the main heating is as follows (3 ), And (3) the auxiliary heating end point at which the sub-pulse application ends within the current application cycle and the main heating start point at which the main pulse application starts within the next application cycle, It is characterized by performing.

  An invention according to claim 3 is the printing apparatus according to claim 1 or 2, further comprising a detection device that detects environmental data in the printing device, and the control device is configured to detect the thermal head. Each heating element constituting the line head of the thermal head based on detection environment data of the detection device within an application cycle in which an application process for selectively heating each heating element constituting the line head is performed In the printing apparatus, the applied pulse width of the sub-pulse applied to the second heat generating element in which auxiliary heating is performed is changed.

  The invention according to claim 4 is the printing apparatus according to claim 3, wherein the control device performs an application process for selectively generating heat from each of the heating elements constituting the line head of the thermal head. In response to changing the applied pulse width of the sub-pulse applied to the second heat generating element in which the auxiliary heating is performed among the heat generating elements constituting the line head of the thermal head within the applied cycle. When the main pulse for main heating is applied to the first heating element that performs main heating among the heating elements constituting the line head of the thermal head, the main pulse is divided into a rectangular pulse and a chopping pulse. And the ratio of the applied pulse width of the rectangular pulse to the applied pulse width of the chopping pulse is changed.

  That is, in the printing apparatus according to claim 1, for each of the heating elements constituting the line head of the thermal head, the main pulse that is the main heating for coloring the printing medium immediately after the current application cycle in which the printing medium is not colored. Only when the next application cycle is applied, a sub-pulse for supplementing the main pulse applied within the next application cycle is applied within the current application cycle and applied to one heating element. Since both the main pulse and the sub pulse to be performed do not exist together in one application period, the application period, which is a fixed time, can be shortened. Furthermore, the application cycle, which is a fixed time, is shortened, and even when the main pulse or sub-pulse is applied, a sufficient non-heating time during which the main pulse and sub-pulse are not applied can be secured. Heat storage that adversely affects print quality can be prevented. In this way, high-speed printing is possible by performing thermal history control in which a new energization correction is performed on the thermal head. In addition, simply changing the timing of each pulse application within each application cycle enables thermal history control with new energization correction to the thermal head, which does not involve improvement of the thermal head, increasing costs. Will not be invited.

  In the printing apparatus according to the first aspect of the present invention, the first heat generating element to which the main pulse is applied and the second heat generating element to which the sub pulse is applied are the same among the plurality of heat generating elements constituting the line head of the thermal head. Although appearing within one application cycle, the end point of the main pulse applied to the first heat generating element and the start time of the sub-pulse applied to the second heat generating element are matched so that one application cycle Since the transfer of the application pattern data can be omitted once, it is possible to further shorten the application cycle, which is a fixed time, and to achieve higher-speed printing.

  In the printing apparatus according to the second aspect of the present invention, the main pulse corresponding to the sub-pulse is applied within the next application cycle in succession to the sub-pulse applied within the current application cycle. It is possible to further shorten a certain application cycle, and it is possible to achieve higher-speed printing. Furthermore, the auxiliary heating by the sub pulse can be efficiently supplemented with respect to the main heating by the main pulse.

  In the printing apparatus according to the third aspect of the present invention, the applied pulse width of the sub-pulse applied to the second heat generating element is changed based on the detected environment data in the plurality of heat generating elements constituting the line head of the thermal head. Therefore, the feedback control based on the detected environment data can be adapted to the new energization correction in the thermal history control of the thermal head, and the print quality can be improved.

  In the printing apparatus according to the fourth aspect of the present invention, the first heating element is applied to the first heating element in response to changing the applied pulse width of the sub-pulse applied to the second heating element based on the detection environment data. Since the ratio of each applied pulse width of the rectangular pulse and the chopping pulse constituting the applied main pulse is changed, it becomes possible to adapt the chopper drive control to new energization correction in the thermal history control of the thermal head, The print quality can be improved.

It is the flowchart figure which showed the control program for carrying out 1st drive control of the thermal head of the tape printer of one Embodiment of this invention. It is the flowchart figure which showed the control program for carrying out 2nd drive control of the thermal head of the same tape printer. It is the flowchart figure which showed the control program for carrying out 3rd drive control of the thermal head of the same tape printer. It is the flowchart figure which showed the control program for carrying out 4th drive control of the thermal head of the same tape printer. It is the figure which showed an example of the table data used with the control program for carrying out 4th drive control of the thermal head of the same tape printer. It is an external appearance perspective view of the tape printer. It is the top view which showed the cassette storage part periphery of the same tape printer. It is the figure which expanded and showed the thermal head of the same tape printer. It is a block diagram which shows the control system of the same tape printer. It is the figure which showed the drive state of each heat generating element in the thermal head of the same tape printer. It is explanatory drawing which showed the conditions by which auxiliary heating is driven in the thermal head of the same tape printer. In the thermal head of the same tape printer, the heat history control by the main heating and the auxiliary heating is explained from the viewpoint of the applied pulse control to each heating element constituting the line head of the thermal head. In the thermal head of the same tape printer, the heat history control by the main heating and the auxiliary heating is explained from the viewpoint of the applied pulse control to each heating element constituting the line head of the thermal head. In the thermal head of the same tape printer, the heat history control by the main heating and the auxiliary heating is explained from the viewpoint of the applied pulse control to each heating element constituting the line head of the thermal head. In the thermal head of the same tape printer, the heat history control by the main heating and the auxiliary heating is explained from the viewpoint of the applied pulse control to each heating element constituting the line head of the thermal head.

[1. Outline of the present invention]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 8 is an enlarged view of the thermal head 41 of the tape printer according to the embodiment of the present invention.
As shown in FIG. 8, the thermal head 41 includes a line head 41B in which a plurality of (eg, 1024 or 2048) heating elements 41A are arranged in a row. The direction in which the heating elements 41A are arranged in a row is the “main scanning direction D1 of the thermal head 41”. On the other hand, the direction perpendicular to the “main scanning direction D1 of the thermal head 41” is the “sub-scanning direction D2 of the thermal head 41”. Reference numeral 42 denotes a plate on which the thermal head 41 is disposed.

In the present embodiment, when the thermal head 41 is driven and the printing process for each line is performed by the line head 41B, the plurality of heating elements 41A constituting the line head 41B are as shown in FIG. One of the following driving states (1) to (3) is set.
(1) The first heating element 41 </ b> C that is mainly heated.
(2) A second heating element 41D that is auxiliary heated.
(3) The third heating element 41E that is not driven (main heating and auxiliary heating).

  The main heating means giving energy capable of causing the printing medium to develop color. In this respect, since the tape printer according to the present embodiment uses an ink ribbon as will be described later, the ink ribbon is used as the heating element 41A that is driven by the first heating element 41C when the main heating is performed. Energy is provided that can melt or sublimate the ink above.

  Auxiliary heating refers to giving energy that can cause the printing medium to develop color in combination with main heating, although the printing medium cannot be developed alone. In this respect, since the tape printer according to the present embodiment uses an ink ribbon as described later, the heating element 41A that is in the driving state of the second heating element 41D by the auxiliary heating is used as the ink heating element 41A. No energy is given to melt or sublimate the ink on the ribbon.

  Therefore, auxiliary heating is limited to those that satisfy the conditions shown in FIG. That is, in the current one-line printing process Q (N), the auxiliary heating is performed for the next one-line printing process Q (N + 1) among the heating elements 41A constituting the line head 41B of the thermal head 41. In the current one-line printing process Q (N), the first heating element 41C is driven but is not heated.

  That is, in each heating element 41A constituting the line head 41B of the thermal head 41, both main heating and auxiliary heating are performed in each one-line printing process..., Q (N), Q (N + 1),. There is nothing.

  The thermal history control (drive control of the thermal head 41) by such main heating and auxiliary heating is performed using FIG. 12 to FIG. 15 from the viewpoint of application pulse control to each heating element 41A constituting the line head 41B of the thermal head 41. I will explain. 12 to 15, the horizontal axis indicates time, and the vertical axis indicates the voltage value or current value of the applied pulse. At this point, time elapses from left to right, and the applied pulse is displayed as low active.

  Of the heating elements 41A constituting the line head 41B of the thermal head 41, as shown in the upper part of FIG. 12, the current one-line printing process Q (N) or the next one-line printing process Q (N + 1) The main pulse MP is applied to the heating element 41A that is main heated and in the driving state of the first heating element 41C even in the current one-line printing process Q (N), and the next one-line printing process Q ( N + 1) also applies the main pulse MP. That is, the main pulse MP is applied to the heat generating element 41A to perform main heating. By giving the heat generating element 41A energy capable of causing the color of the print medium, the heat generating element 41A is turned on. The first heating element 41C is driven.

  Here, as shown in the upper part of FIG. 12, in one heating element 41A, the next one line from the main heating start time ms0 at which the application of the main pulse MP was started in the current one-line printing process Q (N). In the printing process Q (N + 1), the time from the start of application of the main pulse MP to the main heating start time ms1 is defined as an application period F. The application period F is set to a fixed time and coincides with the time of printing processing for each one line, Q (N), Q (N + 1),... And is continuously repeated during printing.

  On the other hand, among the heating elements 41A constituting the line head 41B of the thermal head 41, as shown in the lower part of FIG. 12, the auxiliary heating is performed in the current one-line printing process Q (N) and the second heating element 41D. In the next one-line printing process Q (N + 1) in the driving state, the current one-line printing process Q (N) is applied to the heating element 41A that is mainly heated and is in the driving state of the first heating element 41C. The sub-pulse SP is applied, and the main pulse MP is applied in the next one-line printing process Q (N + 1). The sub-pulse SP performs auxiliary heating by being applied to the heat generating element 41A, and the print medium alone cannot be colored, but the next one-line printing process Q (N + 1) (that is, the next The heat generating element 41A is driven by the second heat generating element 41D by giving the heat generating element 41A energy capable of coloring the print medium in combination with the main heating by the application of the main pulse MP in the application cycle F). Let it be in a state.

  Here, for the sub-pulse SP, the auxiliary heating end point at which the application is ended coincides with the end point of the current application period F (that is, the start point of the next application period F). In the example shown in the lower part of FIG. 12, the auxiliary heating end time point se0 at which the application of the sub-pulse SP is completed in the current one-line printing process Q (N) is the current one-line printing process Q (N). It coincides with the end point of the corresponding application cycle F (that is, the start point of the next application cycle F). From the definition of the application cycle F described above, the auxiliary heating end time point se0 at which the application of the sub-pulse SP is completed in the current one-line printing process Q (N) is the next one-line printing process Q (N + 1). This coincides with the main heating start time ms1 at which application of the main pulse MP is started.

That is, the rules for drive control of the thermal head 41 performed in the present embodiment are summarized from the viewpoint of applied pulse control as follows (A) to (G).
(A) Specifically, the application cycle F is the next from the main heating start time ms0 when the application of the main pulse MP is started in the current one-line printing process Q (N) for one heating element 41A. This is a fixed time from the main heating start time ms1 when the application of the main pulse MP is started in the one-line printing process Q (N + 1).
(B) The application period F is continuously repeated during printing.
(C) The main heating start time point at which application of the main pulse MP is started always coincides with the start time point of the application cycle F.
(D) The auxiliary heating end point at which the application of the sub-pulse SP is ended coincides with the end point of the application cycle F.
(E) The sub-pulse SP applied at the current application period F and the main pulse MP applied at the next application period F are continuous.
(F) Focusing on one heating element 41A, the main pulse MP and the sub-pulse SP do not exist together in one application period F.
(G) If attention is paid within one application period F, it is possible that a main pulse MP applied to a certain heating element 41A and a sub-pulse MP applied to another heating element 41A exist together.

  Further, in the drive control of the thermal head 41 performed in the present embodiment, the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP are set for each heating element 41A constituting the line head 41B of the thermal head 41. Can be changed. The change process includes the total number n of the heating elements 41A (that is, the first heating elements 41C) to which the main pulse MP is to be applied within the application cycle F in which the change is performed, and the application cycle F in which the change is performed. This is performed based on environmental data such as the temperature and voltage of the thermal head 41 in FIG.

  In each application period F, a time period in which the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP do not exist is used as a non-heating time G for cooling the heating element 41A.

  In FIG. 12, in the application cycle F corresponding to the current one-line printing process Q (N), the main heating end time me0 when the application of the main pulse MP shown in the upper part of FIG. The auxiliary heating start time ss0 at which application of the sub-pulse SP shown in the lower stage is started coincides with the auxiliary heating start time ss0. However, in the drive control of the thermal head 41 performed in the present embodiment, as described above, the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP can be changed. That is, in the example shown in FIG. 12, the main heating end time me0 when the application of the main pulse MP shown in the upper part of FIG. 12 is finished, or the application of the sub pulse SP shown in the lower part of FIG. The auxiliary heating start time ss0 to be started can be changed.

  Therefore, as shown in FIG. 13, the auxiliary heating start time ss0 when the application of the sub-pulse SP shown in the lower part of FIG. 13 is started is the main time when the application of the main pulse MP shown in the upper part of FIG. Prior to the heating end time me0, there may be an overlapping time zone MS in which the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP overlap.

  As described above, when there is an overlapping time zone MS in which the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP overlap, the overlapping time zone MS is longer than the time when the application pattern data is transferred to the thermal head 41. On the condition that the application time is short, the auxiliary heating start time ss0 at which the application of the sub-pulse SP shown in the lower part of FIG. 13 is started is the end of the main heating at which the application of the main pulse MP shown in the upper part of FIG. The application of the main pulse MP shown in the upper part of FIG. 13 is terminated at the auxiliary heating start time ss0 at which the time coincides with the time point me0 or conversely, the application of the sub-pulse SP shown in the lower part of FIG. 13 is started. The main heating end time me0 is matched. However, the matching process may be performed even if the condition is not satisfied.

  On the contrary, as shown in FIG. 14, the application of the main pulse MP shown in the upper part of FIG. 14 is completed at the auxiliary heating start time ss0 when the application of the sub-pulse SP shown in the lower part of FIG. 14 is started. There may be a separation time zone SM where the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP are separated after the main heating end time me0.

  Thus, when there is a separation time zone SM in which the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP are separated, the separation time zone SM is longer than the time when the application pattern data is transferred to the thermal head 41. 14 is set to the auxiliary heating start time ss0 at which the application of the sub-pulse SP shown in the lower part of FIG. 14 is started, and the end of the main heating at which the application of the main pulse MP shown in the upper part of FIG. The application of the main pulse MP shown in the upper part of FIG. 14 is ended at the auxiliary heating start time ss0 that coincides with the time point me0, or conversely, the application of the sub-pulse SP shown in the lower part of FIG. 14 is started. The main heating end time me0 is matched. However, the matching process may be performed even if the condition is not satisfied.

  Furthermore, in the drive control of the thermal head 41 performed in the present embodiment, as described above, for each heating element 41A constituting the line head 41B of the thermal head 41, the change is performed within the application cycle F. Based on environmental data such as temperature and voltage of the thermal head 41, the applied pulse width WS of the sub-pulse SP can be changed. In such a case, as shown in FIG. 15, the main pulse MP of the next application period F applied to the same heating element 41A following the sub-pulse SP whose application pulse width WS has been changed is rectangular. The pulse RP and the chopping pulse CP are configured, and the ratio between the applied pulse width WR of the rectangular pulse RP and the applied pulse width WC of the chopping pulse CP can be changed. The changing process may be performed on the heating element 41A different from the heating element 41A to which the sub-pulse SP having the applied pulse width WS changed is applied.

[2. External configuration of the present invention]
Next, a schematic configuration of the tape printer 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is an external perspective view of the tape printer 1. FIG. 7 is a top view showing the vicinity of the cassette housing portion of the tape printer 1.

  As shown in FIG. 6, the tape printing apparatus 1 is a printing apparatus that performs printing on a tape ejected from a tape cassette 5 (see FIG. 7) built in the casing. And a liquid crystal display 4. Similarly, a cassette storage portion 8 (see FIG. 7) for storing a tape cassette 5 having a rectangular shape in plan view is disposed on the upper surface of the housing so as to be covered with a storage cover 9. Further, a control board (not shown) on which a control circuit unit is configured is disposed below the keyboard 3. Further, a tape discharge port 10 through which a printed tape is discharged is formed on the left side surface portion of the cassette housing portion 8. A connection interface (not shown) is disposed on the right side surface of the tape printer 1. This connection interface is used when making a wired or wireless connection with an external device (for example, a personal computer). Therefore, the tape printer 1 can also print the print data transmitted from the external device.

  The keyboard 3 includes a plurality of types of input keys such as a character input key 3A, a print key 3B, a cursor key 3C, a power key 3D, a setting key 3E, and a return key 3R. The character input key 3A is used for character input when creating text composed of document data. The print key 3B is used when instructing to execute printing of print data composed of created text or the like. The cursor key 3C is used when the cursor displayed on the liquid crystal display 4 is moved up, down, left and right. The power key 3D is used when turning on or off the power of the apparatus main body. The setting key 3E is used when performing various settings (such as printing density setting) of the tape printer 1. The return key 3R is used when a line feed command, execution of various processes, or selection determination is commanded.

  On the other hand, the liquid crystal display 4 is a display device that displays characters such as characters over a plurality of lines, and can display print data and the like created by the keyboard 3.

  As shown in FIG. 7, the tape printer 1 is configured so that the tape cassette 5 can be attached to the internal cassette housing portion 8. Further, a tape cutting mechanism including a tape drive printing mechanism 16 and a cutter 17 is disposed inside the tape printer 1. The tape printer 1 can perform printing based on desired print data on the tape drawn from the tape cassette 5 by the tape drive printing mechanism 16. And the tape printer 1 can cut | disconnect the printed tape with the cutter 17 of a tape cutting mechanism. The cut tape is discharged from a tape discharge port 10 formed on the left side surface of the tape printer 1.

A cassette housing frame 18 is disposed inside the tape printer 1. As shown in FIG. 7, the tape cassette 5 is detachably attached to the cassette housing portion frame 18.
The tape cassette 5 includes therein a tape spool 32, a ribbon supply spool 34, a take-up spool 35, a base material supply spool 37, and a joining roller 39, and each is rotatably supported by a shaft. A surface layer tape 31 (corresponding to “print medium”) is wound around the tape spool 32. The surface layer tape 31 is a transparent tape made of a PET (polyethylene terephthalate) film or the like. An ink ribbon 33 is wound around the ribbon supply spool 34. The ink ribbon 33 is coated with ink that is melted or sublimated by ink heating to form an ink layer. The take-up spool 35 takes up the ink ribbon 33 used for printing. A double tape 36 is wound around the base material supply spool 37. This double tape 36 is configured by attaching a release tape to one side of a double-sided adhesive tape having the same width as the surface tape 31 and having an adhesive layer on both sides. Further, the double tape 36 is wound around the base material supply spool 37 so that the peeling tape is located outside. The joining roller 39 is used when the double tape 36 and the surface tape 31 are overlapped and joined.

As shown in FIG. 7, the cassette housing portion frame 18 is provided with an arm 20 that can swing around a shaft 20A. A platen roller 21 and a transport roller 22 are pivotally supported at the tip of the arm 20 so as to be rotatable. Each of the platen roller 21 and the conveying roller 22 has a flexible member such as rubber on the surface.
When the arm 20 swings most clockwise, the platen roller 21 presses the surface tape 31 and the ink ribbon 33 against a thermal head 41 described later. At this time, the conveying roller 22 presses the surface tape 31 and the double tape 36 against the joining roller 39.

A plate 42 is erected on the cassette housing frame 18. A thermal head 41 is disposed on the side surface of the plate 42 on the platen roller 21 side. As shown in FIG. 8, the thermal head 41 is a line in which a plurality of (eg, 1024 or 2048) heating elements 41A are arranged in a line in the same direction as the width direction of the surface tape 31 and the double tape 36. The head 41B is configured.
That is, the direction in which the heating elements 41A are arranged in a row is the “main scanning direction D1 of the thermal head 41”. In contrast, the “sub-scanning direction D2 of the thermal head 41” coincides with the direction in which the surface tape 31 and the ink ribbon 33 move on the thermal head 41.
Returning to FIG. 7, when the tape cassette 5 is mounted at a predetermined position, the plate 42 is fitted into the recess 43 of the tape cassette 5.

  Further, as shown in FIG. 7, a ribbon take-up roller 46 and a joining drive roller 47 are erected on the cassette housing unit frame 18. When the tape cassette 5 is mounted at a predetermined position, the ribbon take-up roller 46 is inserted into the take-up spool 35 of the tape cassette 5. Similarly, the joining driving roller 47 is inserted into the joining roller 39 of the tape cassette 5.

In addition, a tape transport motor 2 (see FIG. 9 described later) is disposed in the cassette housing unit frame 18. The driving force by the tape transport motor 2 is transmitted to the platen roller 21, the transport roller 22, the ribbon take-up roller 46, the joining drive roller 47, and the like via a gear train arranged along the cassette housing section frame 18. Is done.
Therefore, when the rotation of the output shaft of the tape transport motor 2 is started by supplying power to the tape transport motor 2, the take-up spool 35, the joining roller 39, the platen roller 21, and the transport roller 22 also start to rotate in conjunction with each other. . Thus, the surface layer tape 31, the ink ribbon 33, and the double tape 36 in the tape cassette 5 are unwound from the tape spool 32, the ribbon supply spool 34, and the base material supply spool 37, respectively, in the downstream direction (tape discharge port 10, It is conveyed in the direction of the take-up spool 35).

  Thereafter, the surface tape 31 and the ink ribbon 33 pass between the platen roller 21 and the thermal head 41 after being overlapped with each other. Accordingly, in the tape printing apparatus 1, the surface tape 31 and the ink ribbon 33 are conveyed while being sandwiched between the platen roller 21 and the thermal head 41. At this time, a large number of heating elements 41A arranged in the thermal head 41 are selectively and intermittently energized (pulsed) by the control unit 60 (see FIG. 9) based on print data and a control program described later. .

  Here, each heating element 41A generates heat when energized and melts or sublimates the ink applied to the ink ribbon 33, so that the ink of the ink layer formed on the ink ribbon 33 is applied to the surface tape 31 in dot units ( (Equivalent to “printing dots”). As a result, a dot image desired by the user based on the print data is formed on the surface tape 31 as a mirror image.

  Thereafter, the ink ribbon 33 passes through the thermal head 41 and is taken up by the ribbon take-up roller 15. On the other hand, the surface tape 31 is overlapped with the double tape 36 and passes between the conveying roller 22 and the joining roller 39. At this time, the surface tape 31 and the double tape 36 are pressed against each other by the conveying roller 22 and the joining roller 39 to form a laminated tape 38. Here, the laminated tape 38 is firmly overlapped with the double tape 36 on the printed surface side of the surface tape 31 on which dot printing has been completed. Therefore, the user can visually recognize the normal image of the printed image from the back side of the printing surface of the surface tape 31 (that is, the front side of the laminated tape 38).

Thereafter, the laminated tape 38 is conveyed further downstream of the conveying roller 22 and reaches a tape cutting mechanism including the cutter 17. The tape cutting mechanism includes a cutter 17 and a cutting motor 72 (see FIG. 9). The cutter 17 includes a fixed blade 17A and a rotating blade 17B, and is a scissors-type cutter that shears the object to be cut by rotating the rotating blade 17B with respect to the fixed blade 17A. The rotating blade 17B is disposed so as to be reciprocally swingable around a fulcrum by a cutting motor 72. Therefore, by driving the cutting motor 72, the laminated tape 38 is sheared by the fixed blade 17A and the rotating blade 17B.
The cut laminated tape 38 is discharged to the outside of the tape printer 1 through the tape discharge port 10. And the said laminated tape 38 can be used as an adhesive label which can be affixed on arbitrary places, if the peeling paper of the double tape 36 is peeled and an adhesive bond layer is exposed. Details of the configuration of thermal transfer by the thermal head 41 will be described later.

[3. Internal configuration of the present invention]
Next, the control configuration of the tape printer 1 will be described in detail with reference to the drawings. FIG. 9 is a block diagram showing a control system of the tape printer 1.
A control board (not shown) is disposed in the tape printer 1. On this control board, a control unit 60, a timer 67, a head drive circuit 68, a cutting motor drive circuit 69, and a transport motor. A drive circuit 70 is provided.

The control unit 60 includes a CPU 61, a CG-ROM 62, an EEPROM 63, a ROM 64, and a RAM 66. The control unit 60 is connected to a timer 67, a head drive circuit 68, a cutting motor drive circuit 69, and a transport motor drive circuit 70. Further, the control unit 60 is also connected to the liquid crystal display 4, the cassette sensor 7, the thermistor 73, the keyboard 3, and the connection interface 71.
The CPU 61 is a central processing unit that plays a central role in various controls in the tape printer 1. Therefore, the CPU 61 controls each peripheral device such as the liquid crystal display 4 based on an input signal from the keyboard 3 or the like and various control programs described later.

The CG-ROM 62 is a character generator memory that stores image data of characters and symbols to be printed in correspondence with code data in a dot pattern. The EEPROM 63 is a non-volatile memory in which stored contents can be written / erased, and stores data indicating user settings and the like in the tape printer 1.
The ROM 64 stores various control programs and data for the tape printer 1. Therefore, a control program to be described later is stored in the ROM 64.

The RAM 66 is a storage device that temporarily stores calculation results and the like in the CPU 61. The RAM 66 also stores print data generated by input from the keyboard 3 and print data fetched from the external device 78 via the connection interface 71.
The timer 67 is a time measuring device that times the predetermined period when the control of the tape printer 1 is executed. Specifically, the timer 67 is referred to when starting / ending energization (pulse application) or the like to the heating element 41A of the thermal head 41 in a control program described later. The thermistor 73 is a sensor for detecting the temperature of the thermal head 41 and is attached to the thermal head 41.

  The head drive circuit 68 is a circuit that controls the drive state of the thermal head 41 by supplying a drive signal to the thermal head 41 based on a control program to be described later based on a control signal from the CPU 61. At this time, the head drive circuit 68 controls the presence / absence of energization (pulse application) of each heating element 41A based on a signal (strobe (STB) signal) associated with the strobe number associated with each heating element 41A. Thus, the heat generation mode of the entire thermal head 41 is controlled. The cutting motor driving circuit 69 is a circuit that controls the driving of the cutting motor 72 by supplying a driving signal to the cutting motor 72 based on a control signal from the CPU 61. The transport motor drive circuit 70 is a control circuit that supplies a drive signal to the tape transport motor 2 based on a control signal from the CPU 61 and controls the drive of the tape transport motor 2. Thereby, a “conveyance device” is configured.

[4-1. First operation of the present invention]
Next, the first drive control of the thermal head 41 of the tape printer 1 will be described. FIG. 1 is a flowchart showing a control program for performing the first drive control of the thermal head 41 of the tape printer 1. The control program shown in the flowchart of FIG. 1 is stored in the ROM 64 and executed by the CPU 61.

  As shown in FIG. 1, in the first drive control of the thermal head 41, first, in S11, the CPU 61 pre-reads print data from the RAM 66 and creates "thermal head print row data". At this time, the CPU 61 determines the “thermal head print train” in which sub-pulse data and main pulse data for one line are arranged for each application period F based on the above-described rules (A) to (G) (auxiliary heating conditions). Data "is created. The sub-pulse data and main pulse data for one line are determined for each heating element 41A constituting the line head 41B of the thermal head 41.

  In this regard, for “thermal head print train data” for one line of the first application period F, “temperature information” determined based on the detected temperature Z of the thermal head 41 by the thermistor 73 is applied to the sub-pulse SP. This is reflected in the determination of the pulse width WS. The CPU 61 transfers the reflected sub-pulse data to the head driving circuit 68. Thereafter, the CPU 61 proceeds to S12.

  In S12, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. Here, when it is not the start timing of the sub pulse SP (S12: NO), the CPU 61 waits until the start timing of the sub pulse SP comes by returning to S12. On the other hand, if it is the start timing of the sub pulse SP (S12: YES), the CPU 61 proceeds to S13.

  In S13, the CPU 61 starts applying the sub pulse SP. In other words, the CPU 61 causes the head driving circuit 68 to latch the sub-pulse data transferred at this time, and applies the sub-pulse SP to the heating element 41A to be auxiliary heated so that the second heating element 41D is driven. To do. Thereafter, the CPU 61 proceeds to S14.

  In S14, the CPU 61 determines whether it is the start time or end time of the application cycle F. This determination is made using the timer 67 or the like. That is, it is determined whether it is “auxiliary heating end time se” at which the application of the sub-pulse SP is ended or “main heating start time ms” at which the application of the main pulse MP is started. Here, if it is not the start time and end time of the application cycle F (S14: NO), the CPU 61 proceeds to S15.

  In S15, the CPU 61 transfers the main pulse data to be transferred at this time to the head drive circuit 68 only once. Thereafter, the CPU 61 returns to S14. On the other hand, in S14, when it is the start time or end time of the application cycle F (S14: YES), the CPU 61 proceeds to S16.

  In S <b> 16, the CPU 61 detects the temperature of the thermal head 41 with the thermistor 73 and determines “temperature information” based on the detected temperature Z. Thereafter, the CPU 61 proceeds to S17.

  In S17, the CPU 61 counts the number of heating dots for one line (that is, the total number n of the heating elements 41A as the main heating target in the line head 41B of the thermal head 41 in this application period F), and “vertical dot rank”. To decide. Thereafter, the CPU 61 proceeds to S18.

  In S18, the CPU 61 starts applying the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to latch the main pulse data transferred in S15, and applies the main pulse MP to the main heating target heating element 41A so that the first heating element 41C is driven. To do. Regarding the driving state at this time, the CPU 61 causes the head driving circuit 68 to reflect the applied pulse width WM of the main pulse MP determined from the “temperature information” in S16 and the “vertical dot rank” in S17. Thereafter, the CPU 61 proceeds to S19.

  In S19, the CPU 61 determines whether or not the main pulse MP and the sub pulse SP overlap. This determination is made by comparing the “main heating end time me” at which the application of the main pulse MP is finished with the “auxiliary heating start time ss” at which the application of the sub pulse SP is started. If the main pulse MP and the sub-pulse SP do not overlap (S19: NO), the process proceeds to S23 described later. On the other hand, when the main pulse MP and the sub pulse SP overlap (S19: YES), the CPU 61 proceeds to S20.

  In S20, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. If it is not the start timing of the sub-pulse SP (S20: NO), the CPU 61 proceeds to S21.

  In S 21, the CPU 61 transfers the “OR data” (the transfer target at this time) of the main pulse MP and the sub pulse SP to the head drive circuit 68 only once. Thereafter, the CPU 61 returns to S20. On the other hand, if it is the start timing of the sub-pulse SP in S20 (S20: YES), the CPU 61 proceeds to S22.

  In S22, the CPU 61 causes the head drive circuit 68 to latch the “OR data” of the main pulse MP and the sub pulse SP. Thereafter, the CPU 61 proceeds to S23.

  In S23, the CPU 61 determines whether it is the application end time of the main pulse MP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “main heating end time me” at which the application of the main pulse MP is ended. If it is not the main pulse MP application end time (S23: NO), the CPU 61 proceeds to S24.

  In S24, the CPU 61 transfers the sub-pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S23. On the other hand, if it is the application end time of the main pulse MP in S23 (S23: YES), the CPU 61 proceeds to S25.

  In S25, the CPU 61 ends the application of the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to finish applying the main pulse MP to the main heating target heating element 41A. Thereafter, the CPU 61 proceeds to S26.

  In S <b> 26, the CPU 61 determines whether printing has ended. Here, when the printing is not completed (S26: NO), the CPU 61 returns to S12 and repeats the processes after S12. On the other hand, when printing is completed (S26: YES), the CPU 61 terminates this program.

[4-2. Second operation of the present invention]
Next, the second drive control of the thermal head 41 of the tape printer 1 will be described. FIG. 2 is a flowchart showing a control program for performing the second drive control of the thermal head 41 of the tape printer 1. Note that the control program shown in the flowchart of FIG. 2 is stored in the ROM 64 or the like and executed by the CPU 61.

  As shown in FIG. 2, in the second drive control of the thermal head 41, first, in S <b> 41, the CPU 61 pre-reads print data from the RAM 66 and creates “thermal head print row data”. At this time, the CPU 61 determines the “thermal head print train” in which sub-pulse data and main pulse data for one line are arranged for each application period F based on the above-described rules (A) to (G) (auxiliary heating conditions). Data "is created. The sub-pulse data and main pulse data for one line are determined for each heating element 41A constituting the line head 41B of the thermal head 41.

  In this regard, for “thermal head print train data” for one line of the first application period F, “temperature information” determined based on the detected temperature Z of the thermal head 41 by the thermistor 73 is applied to the sub-pulse SP. This is reflected in the determination of the pulse width WS. The CPU 61 transfers the reflected sub-pulse data to the head driving circuit 68. Thereafter, the CPU 61 proceeds to S42.

  In S42, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. If it is not the start timing of the sub pulse SP (S42: NO), the CPU 61 waits until the start timing of the sub pulse SP comes by returning to S42. On the other hand, when it is the start timing of the sub-pulse SP (S42: YES), the CPU 61 proceeds to S43.

  In S43, the CPU 61 starts applying the sub pulse SP. In other words, the CPU 61 causes the head driving circuit 68 to latch the sub-pulse data transferred at this time, and applies the sub-pulse SP to the heating element 41A to be auxiliary heated so that the second heating element 41D is driven. To do. Thereafter, the CPU 61 proceeds to S44.

  In S <b> 44, the CPU 61 determines whether it is the start time or end time of the application cycle F. This determination is made using the timer 67 or the like. That is, it is determined whether it is “auxiliary heating end time se” at which the application of the sub-pulse SP is ended or “main heating start time ms” at which the application of the main pulse MP is started. Here, if it is not the start time and end time of the application cycle F (S44: NO), the CPU 61 proceeds to S45.

  In S45, the CPU 61 transfers the main pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S44. On the other hand, in S44, when it is the start time or end time of the application cycle F (S44: YES), the CPU 61 proceeds to S46.

  In S <b> 46, the CPU 61 detects the temperature of the thermal head 41 with the thermistor 73 and determines “temperature information” based on the detected temperature Z. Thereafter, the CPU 61 proceeds to S47.

  In S47, the CPU 61 counts the number of heat-generating dots for one line (that is, the total number n of heat-generating elements 41A to be heated in the line head 41B of the thermal head 41 in this application period F). To decide. Thereafter, the CPU 61 proceeds to S48.

  In S48, the CPU 61 starts applying the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to latch the main pulse data transferred in S45, and applies the main pulse MP to the main heating target heating element 41A so that the first heating element 41C is driven. To do. With respect to the driving state at this time, the CPU 61 causes the head driving circuit 68 to reflect the applied pulse width WM of the main pulse MP determined from the “temperature information” in S46 and the “vertical dot rank” in S47. Thereafter, the CPU 61 proceeds to S49.

  In S49, the CPU 61 first calculates the variable Tx by subtracting the total value of the applied pulse width WM of the main pulse MP and the applied pulse width SM of the sub-pulse SP from the printing cycle F. Further, the CPU 61 determines whether the sign of the variable Tx is negative (“−”) and the absolute value of the variable Tx is greater than the data transfer time L. The data transfer time L is the data transfer time in S45 and S51 and S54 described later.

  If the sign of the variable Tx is not minus (“−”) or the absolute value of the variable Tx is not greater than the data transfer time L (S49: NO), the CPU 61 proceeds to S53 described later. On the other hand, when the sign of the variable Tx is minus (“−”) and the absolute value of the variable Tx is longer than the data transfer time L (S49: YES), the CPU 61 proceeds to S50.

  In S50, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. If it is not the start timing of the sub pulse SP (S50: NO), the CPU 61 proceeds to S51.

  In S51, the CPU 61 transfers the “OR data” (the transfer target at this time) of the main pulse MP and the sub pulse SP to the head drive circuit 68 only once. Thereafter, the CPU 61 returns to S50. On the other hand, if it is the start timing of the sub-pulse SP in S50 (S50: YES), the CPU 61 proceeds to S52.

  In S52, the CPU 61 causes the head drive circuit 68 to latch the “OR data” of the main pulse MP and the sub pulse SP. Thereafter, the CPU 61 proceeds to S53.

  In S53, the CPU 61 determines whether it is the application end time of the main pulse MP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “main heating end time me” at which the application of the main pulse MP is ended. Here, when it is the application end time of the main pulse MP (S53: NO), the CPU 61 proceeds to S54.

  In S54, the CPU 61 transfers the sub-pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S53. On the other hand, if it is not the application end time of the main pulse MP in S53 (S53: YES), the CPU 61 proceeds to S55.

  In S55, the CPU 61 ends the application of the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to finish applying the main pulse MP to the main heating target heating element 41A. Thereafter, the CPU 61 proceeds to S56.

  In S56, the CPU 61 determines whether printing has been completed. Here, when printing is completed (S56: YES), the CPU 61 terminates this program. On the other hand, when the printing is not completed (S56: NO), the CPU 61 proceeds to S57.

  In S57, the CPU 61 determines whether or not the sign of the variable Tx is larger than “0” and the absolute value of the variable Tx is smaller than the data transfer time L. Here, when the sign of the variable Tx is not greater than “0” or the absolute value of the variable Tx is not smaller than the data transfer time L (S57: NO), the process returns to S42, and the processes after S42 are performed. repeat. On the other hand, when the sign of the variable Tx is larger than “0” and the absolute value of the variable Tx is smaller than the data transfer time L (S57: YES), the CPU 61 returns to S43 and performs the processes after S43. repeat.

  Thereby, the time difference between the “main heating end time me” at which the application of the main pulse MP is terminated and the “auxiliary heating start time ss” at which the application of the sub pulse SP is started is the data transfer time in the above S45, S51, S54. When it is smaller than L, the “auxiliary heating start time ss” at which the application of the sub pulse SP is started can coincide with the “main heating end time me” at which the application of the main pulse MP is ended.

[4-3. Third operation of the present invention]
Next, the third drive control of the thermal head 41 of the tape printer 1 will be described. FIG. 3 is a flowchart showing a control program for performing the third drive control of the thermal head 41 of the tape printer 1. The control program shown in the flowchart of FIG. 3 is stored in the ROM 64 or the like and executed by the CPU 61.

  As shown in FIG. 3, in the third drive control of the thermal head 41, first, in S <b> 81, the CPU 61 pre-reads print data from the RAM 66 to create “thermal head print row data”. At this time, the CPU 61 determines the “thermal head print train” in which sub-pulse data and main pulse data for one line are arranged for each application period F based on the above-described rules (A) to (G) (auxiliary heating conditions). Data "is created. The sub-pulse data and main pulse data for one line are determined for each heating element 41A constituting the line head 41B of the thermal head 41.

  In this regard, for “thermal head print train data” for one line of the first application period F, “temperature information” determined based on the detected temperature Z of the thermal head 41 by the thermistor 73 is applied to the sub-pulse SP. This is reflected in the determination of the pulse width WS. The CPU 61 transfers the reflected sub-pulse data to the head driving circuit 68. Thereafter, the CPU 61 proceeds to S82.

  In S82, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. If it is not the start timing of the sub-pulse SP (S82: NO), the CPU 61 waits until the start timing of the sub-pulse SP comes by returning to S82. On the other hand, when it is the start timing of the sub-pulse SP (S82: YES), the CPU 61 proceeds to S83.

  In S83, the CPU 61 starts applying the sub pulse SP. In other words, the CPU 61 causes the head driving circuit 68 to latch the sub-pulse data transferred at this time, and applies the sub-pulse SP to the heating element 41A to be auxiliary heated so that the second heating element 41D is driven. To do. Thereafter, the CPU 61 proceeds to S84.

  In S84, the CPU 61 determines whether it is the start time or end time of the application cycle F. This determination is made using the timer 67 or the like. That is, it is determined whether it is “auxiliary heating end time se” at which the application of the sub-pulse SP is ended or “main heating start time ms” at which the application of the main pulse MP is started. Here, if it is not the start time and end time of the application cycle F (S84: NO), the CPU 61 proceeds to S85.

  In S85, the CPU 61 transfers the main pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S84. On the other hand, in S84, when it is the start time or end time of the application cycle F (S84: YES), the CPU 61 proceeds to S86.

  In S <b> 86, the CPU 61 detects the temperature of the thermal head 41 with the thermistor 73 and determines “temperature information” based on the detected temperature Z. Thereafter, the CPU 61 proceeds to S87.

  In S87, the CPU 61 counts the number of heat-generating dots for one line (that is, the total number n of heat-generating elements 41A as the main heating target in the line head 41B of the thermal head 41 in this application cycle F). To decide. Thereafter, the CPU 61 proceeds to S88.

  In S88, the CPU 61 starts applying the main pulse MP. In other words, the CPU 61 causes the head driving circuit 68 to latch the main pulse data transferred in S85, and applies the main pulse MP to the main heating target heating element 41A so that the first heating element 41C is driven. To do. Regarding the driving state at this time, the CPU 61 reflects the applied pulse width WM of the main pulse MP determined from the “temperature information” in S86 and the “vertical dot rank” in S87 to the head driving circuit 68. Thereafter, the CPU 61 proceeds to S89.

  In S89, the CPU 61 first calculates the variable Tx by subtracting the total value of the applied pulse width WM of the main pulse MP and the applied pulse width SM of the sub-pulse SP from the printing cycle F. Further, the CPU 61 determines whether or not the sign of the variable Tx is larger than “0” and the absolute value of the variable Tx is smaller than the data transfer time L. The data transfer time L is the data transfer time in S85 and S92 and S95 described later. Here, when the sign of the variable Tx is larger than “0” and the absolute value of the variable Tx is smaller than the data transfer time L (S89: YES), the CPU 61 proceeds to S97 described later.

  On the other hand, when the sign of the variable Tx is not greater than “0” or the absolute value of the variable Tx is not smaller than the data transfer time L (S98: NO), the CPU 61 proceeds to S90.

  In S90, the CPU 61 determines whether the sign of the variable Tx is negative (“−”) and the absolute value of the variable Tx is greater than the data transfer time L. Here, when the sign of the variable Tx is not minus (“−”) or the absolute value of the variable Tx is not greater than the data transfer time L (S90: NO), the CPU 61 proceeds to S94 described later. On the other hand, when the sign of the variable Tx is minus (“−”) and the absolute value of the variable Tx is longer than the data transfer time L (S90: YES), the CPU 61 proceeds to S91.

  In S91, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. Here, if it is not the start timing of the sub-pulse SP (S91: NO), the CPU 61 proceeds to S92.

  In S92, the CPU 61 transfers the “OR data” (the transfer target at this time) of the main pulse MP and the sub pulse SP to the head drive circuit 68. Thereafter, the CPU 61 returns to S91. On the other hand, if it is the start timing of the sub-pulse SP in S91 (S91: YES), the CPU 61 proceeds to S93.

  In S93, the CPU 61 causes the head driving circuit 68 to latch the “OR data” of the main pulse MP and the sub pulse SP. Thereafter, the CPU 61 proceeds to S94.

  In S94, the CPU 61 determines whether it is the application end time of the main pulse MP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “main heating end time me” at which the application of the main pulse MP is ended. If it is not the main pulse MP application end time (S94: NO), the CPU 61 proceeds to S95.

  In S95, the CPU 61 transfers the sub-pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S94. On the other hand, when it is the application end time of the main pulse MP in S94 (S94: YES), the CPU 61 proceeds to S96.

  In S96, the CPU 61 ends the application of the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to finish applying the main pulse MP to the main heating target heating element 41A. Thereafter, the CPU 61 proceeds to S97.

  In S97, the CPU 61 determines whether printing has been completed. Here, when the printing is not completed (S97: NO), the CPU 61 returns to S82 and repeats the processes after S82. On the other hand, when printing is completed (S97: YES), the CPU 61 terminates this program.

  As a result, the time difference between the “main heating end time me” at which the application of the main pulse MP is terminated and the “auxiliary heating start time ss” at which the application of the sub pulse SP is started is the data transfer time in S85, S92, and S95. When it is smaller than L, the “main heating end time me” at which the application of the main pulse MP is ended can be matched with the “auxiliary heating start time ss” at which the application of the sub pulse SP is started.

[4-4. Fourth operation of the present invention]
Next, the fourth drive control of the thermal head 41 of the tape printer 1 will be described. FIG. 4 is a flowchart showing a control program for performing the fourth drive control of the thermal head 41 of the tape printer 1. Note that the control program shown in the flowchart of FIG. 4 is stored in the ROM 64 or the like and executed by the CPU 61.

  As shown in FIG. 4, in the fourth drive control of the thermal head 41, first, in S <b> 111, the CPU 61 pre-reads print data from the RAM 66 to create “thermal head print row data”. At this time, the CPU 61 determines the “thermal head print train” in which sub-pulse data and main pulse data for one line are arranged for each application period F based on the above-described rules (A) to (G) (auxiliary heating conditions). Data "is created. The sub-pulse data and main pulse data for one line are determined for each heating element 41A constituting the line head 41B of the thermal head 41.

  In this regard, for “thermal head print train data” for one line of the first application period F, “temperature information” determined based on the detected temperature Z of the thermal head 41 by the thermistor 73 is applied to the sub-pulse SP. This is reflected in the determination of the pulse width WS. The CPU 61 transfers the reflected sub-pulse data to the head driving circuit 68. Thereafter, the CPU 61 proceeds to S112.

  In S112, the CPU 61 determines whether it is the start timing of the sub pulse SP. This determination is made using the timer 67 or the like. That is, it is determined whether or not it is the “auxiliary heating start time ss” at which application of the sub pulse SP is started. Here, when it is not the start timing of the sub pulse SP (S112: NO), the CPU 61 returns to S112 and waits until the start timing of the sub pulse SP arrives. On the other hand, when it is the start timing of the sub-pulse SP (S112: YES), the CPU 61 proceeds to S113.

  In S113, the CPU 61 starts applying the sub pulse SP. In other words, the CPU 61 causes the head driving circuit 68 to latch the sub-pulse data transferred at this time, and applies the sub-pulse SP to the heating element 41A to be auxiliary heated so that the second heating element 41D is driven. To do. Thereafter, the CPU 61 proceeds to S114.

  In S <b> 114, the CPU 61 determines whether it is the start time or end time of the application cycle F. This determination is made using the timer 67 or the like. That is, it is determined whether it is “auxiliary heating end time se” at which the application of the sub-pulse SP is ended or “main heating start time ms” at which the application of the main pulse MP is started. If it is not the start time and end time of the application cycle F (S114: NO), the CPU 61 proceeds to S115.

  In S115, the CPU 61 transfers the main pulse data to be transferred at this time to the head driving circuit 68 only once. Thereafter, the CPU 61 returns to S114. On the other hand, in S114, when it is the start time or end time of the application cycle F (S114: YES), the CPU 61 proceeds to S116.

  In S <b> 116, the CPU 61 detects the temperature of the thermal head 41 with the thermistor 73. Further, the CPU 61 counts the number of heat generating dots for one line (that is, the total number n of the heat generating elements 41A to be heated in the line head 41B of the thermal head 41 in this application period F). Further, the CPU 61 determines the sub-pulse time (applied pulse width WS of the sub-pulse SP) or the rectangular pulse time (the rectangular pulse RP) based on the detected temperature Z of the thermal head 41 and the total number of heating dots n for one line. Application pulse width WR), chopping time (application pulse width WC of chopping pulse CP), chopping duty ratio, and the like are determined.

  For the determination, for example, table data 201 as shown in FIG. 5 is used. The table data 201 in FIG. 5 has an application period F of 875 μsec (printing speed is 80 mm / sec). The table data 201 of FIG. 5 includes a temperature range column 211, a heating dot number column 212, a sub-pulse column 213, and main pulse columns 214, 215, 216, and 217.

  In the temperature range column 211, the temperature range of the thermal head 41 is described in units of “degrees Celsius (° C.)”. In the heating dot number column 212, the range of the number of heating dots for one line is described in units of number. In the sub-pulse column 213, the applied pulse width WS of the sub-pulse SP is described in units of “μsec” (see FIG. 15). In the main pulse column 214, the applied pulse width WR of the rectangular pulse RP constituting the main pulse MP is described in units of “μsec” (see FIG. 15). In the main pulse column 215, the applied pulse width WC of the chopping pulse CP constituting the main pulse MP is described in units of “μsec” (see FIG. 15). In the main pulse column 216, the number of chopping pulses CP constituting the main pulse MP is described. In the main pulse column 217, the duty ratio of the chopping pulse CP constituting the main pulse MP is described. The table data 201 in FIG. 5 is created for each of a plurality of application cycles F and stored in the ROM 64.

The matters determined in S116 are performed by the following methods (1) to (5).
(1) The application pulse width WS of the sub-pulse SP is determined from the temperature of the thermal head 41 and the number of heating dots for one line.
(2) The application pulse width WS of the rectangular pulse RP constituting the main pulse MP is determined by multiplying the application pulse width WS of the sub-pulse SP by a fixed coefficient.
(3) A calculated value obtained by subtracting the total value of the applied pulse width WS of the sub-pulse SP and the applied pulse width WR of the rectangular pulse RP from the application period F is determined as the applied pulse width WC of the chopping pulse CP.
(4) The number of chopping pulses CP is determined by dividing the applied pulse width WC of the chopping pulses CP by the fixed chopping cycle time.
(5) The duty ratio of the chopping pulse CP is determined by multiplying the total value of the applied pulse width WS of the sub-pulse SP and the applied pulse width WC of the chopping pulse CP by a coefficient of an experimental value.

  When the application period F is 875 μsec, the CPU 61 can read the numerical values determined by the methods (1) to (5) from the table data 201 shown in FIG. As described above, the ROM 64 stores a plurality of table data created for each application period in addition to the table data 201 shown in FIG. Therefore, the CPU 61 performs the determination process in S116 based on the data table corresponding to the value of the application period F. Thereafter, the CPU 61 proceeds to S117.

  In S117, the CPU 61 starts applying the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to latch the main pulse data transferred in S115 and apply the main pulse MP to the main heating target heating element 41A so that the first heating element 41C is driven. To do. Thereafter, the CPU 61 proceeds to S118.

  In S118, the CPU 61 operates the application of the main pulse MP based on the matter determined in S116. That is, the rectangular pulse RP and the chopping pulse CP constituting the main pulse MP are controlled so as to be the matters determined in S116. Thereafter, the CPU 61 proceeds to S119.

  In S119, the CPU 61 determines whether it is the application end time of the main pulse MP. This determination is made using the timer 67 or the like. That is, it is determined whether or not “main heating end time me” at which application of the main pulse MP is ended. If it is not the main pulse MP application end time (S119: NO), the CPU 61 proceeds to S120.

  In S120, the CPU 61 transfers the sub-pulse data to be transferred at this time to the head drive circuit 68 only once. At this time, the CPU 61 also adjusts the applied pulse width WS of the sub-pulse SP based on the matter determined in S116. Thereafter, the CPU 61 returns to S119. On the other hand, if it is the application end time of the main pulse MP in S119 (S119: YES), the CPU 61 proceeds to S121.

  In S121, the CPU 61 ends the application of the main pulse MP. That is, the CPU 61 causes the head driving circuit 68 to finish applying the main pulse MP to the main heating target heating element 41A. Thereafter, the CPU 61 proceeds to S122.

  In S122, the CPU 61 determines whether printing has been completed. Here, when the printing is not completed (S122: NO), the CPU 61 returns to S112 and repeats the processes after S112. On the other hand, when printing is completed (S122: YES), the CPU 61 terminates this program.

[5-1. Summary]
That is, in the tape printer 1 according to the present embodiment, an ink ribbon is provided for each heating element 41A constituting the line head 41B of the thermal head 41 based on the rules (auxiliary heating conditions) described in (A) to (G) above. Immediately after the current application period F in which the ink on the ink 33 is not melted or sublimated, the next application period F in which the main pulse MP serving as the main heating for melting or sublimating the ink on the ink ribbon 33 is continued. Only, the sub-pulse SP for supplementing the main pulse MP applied in the next application cycle F is applied in the current application cycle F (see the lower stages of FIGS. 11 and 12). Accordingly, both the main pulse MP and the sub-pulse SP applied to one heating element 41A do not exist together within one application period F (see the rule of (D) above), so that it is within a certain time. A certain application period F can be shortened.

  Furthermore, the application period F, which is a certain time, is shortened, and even when the main pulse MP or the subpulse SP is applied, the non-heating time G in which the main pulse MP and the subpulse SP are not applied can be sufficiently secured ( As shown in FIGS. 12 to 15, even if printing is continued, heat storage that adversely affects printing quality can be prevented. In this way, the thermal history control in which new energization correction is performed on the thermal head 41 is performed, thereby enabling high-speed printing. Furthermore, by simply changing the timing of application of each pulse within each application period F (see FIGS. 1 to 4), thermal history control in which new energization correction is performed on the thermal head 41 is performed. Since the improvement of 41 is not accompanied, there is no cost increase.

  Further, in the tape printer 1 according to the present embodiment, the sub-pulse SP is continued in succession to the sub-pulse SP applied within the current application period F based on the rules (auxiliary heating conditions) of the above (A) to (G). Is applied within the next application period F (see the lower part of FIGS. 12 to 15, see FIGS. 1 to 4), the application period F, which is a fixed time, can be further shortened. This makes it possible to achieve higher-speed printing. Furthermore, the auxiliary heating by the sub pulse SP can be efficiently supplemented with respect to the main heating by the main pulse MP.

  In the tape printer 1 according to the present embodiment, when “thermal head print train data” is created by the CPU 61 (S11, S41, S81, S111), it is independent from the application start time (ms) of the main pulse MP. Thus, the application start time (ss) of the sub-pulse SP can be set, so that there are less restrictions on new energization correction in the thermal history control of the thermal head 41A, and the degree of freedom in concrete application increases.

  In the tape printer 1 according to the present embodiment, the first heat generating element 41C to which the main pulse MP is applied and the sub pulse SP are applied to the plurality of heat generating elements 41A constituting the line head 41B of the thermal head 41. The two heating elements 41D appear within one application period F (see FIGS. 12 to 15), that is, in each one-line printing process Q (N), Q (N + 1),. In this regard, if the application pulse width WS of the sub-pulse SP applied to the second heating element 41E is made shorter than the application pulse width WM of the main pulse SP applied to the first heating element 41C, one application cycle is obtained. Since more applied energy from the main pulse MP can be secured within F (see FIGS. 12 to 15), the application period F, which is a fixed time, can be further shortened without adversely affecting print quality. This makes it possible to achieve higher-speed printing.

  In the tape printer 1 according to the present embodiment, the first heat generating element 41C to which the main pulse MP is applied and the sub pulse SP are applied to the plurality of heat generating elements 41A constituting the line head 41B of the thermal head 41. The two heating elements 41D appear within one application period F (see FIGS. 12 to 15), that is, in each one-line printing process Q (N), Q (N + 1),. However, as shown in FIG. 13, a part of the main pulse MP applied to the first heating element 41C (upper stage in FIG. 13) and a part of the sub-pulse SP applied to the second heating element 41E ( 13 can be overlapped within one application period F, and there can be an overlapping time zone MS in which the application pulse width WM of the main pulse MP and the application pulse width WS of the sub-pulse SP overlap. The application period F, which is time, can be further shortened, and higher-speed printing can be achieved.

  In the tape printer 1 according to the present embodiment, in the plurality of heating elements 41A constituting the line head 41B of the thermal head 41, the applied pulse width WM of the main pulse MP applied to the first heating element 41C or The applied pulse width WS of the sub-pulse SP applied to the second heating element 41D is changed based on “temperature information” determined based on the detected temperature Z of the thermal head 41 by the thermistor 73 (S16). , S18, S46, S48, S86, S88, S116, S117), it becomes possible to adapt the feedback control based on the detected temperature to the new energization correction in the thermal history control of the thermal head 41, thereby improving the print quality. Can be achieved.

  Further, in the tape printer 1 according to the present embodiment, according to the total number n of the first heating elements 41C to which the main pulse MP is applied among the plurality of heating elements 41A constituting the line head 41B of the thermal head 41. The application pulse width WM of the main pulse MP applied to the first heating element 41C or the application pulse width WS of the sub-pulse SP applied to the second heating element 41D is changed (S17, S18, S47, S48, S87, S88, S116, S117), and the total number n of the first heating elements 41C to which the main pulse MP is applied is a temperature information source, so that new energization correction in the thermal history control of the thermal head 41 is performed. On the other hand, the feedback control based on the temperature information source can be adapted, and the print quality can be improved.

  In the tape printer 1 according to the present embodiment, the first heat generating element 41C to which the main pulse MP is applied and the sub pulse SP are applied to the plurality of heat generating elements 41A constituting the line head 41B of the thermal head 41. The two heating elements 41D appear within one application period F (see FIGS. 12 to 15), that is, in each one-line printing process Q (N), Q (N + 1),. However, the main pulse applied to the first heating element 41C is compared with the transfer time Z of the applied pattern data necessary for selectively heating each heating element 41A constituting the line head 41B of the thermal head 41. When the time difference between the end time (me) of MP and the start time (ss) of the sub pulse SP applied to the second heating element 41D is short, the second drive control of the thermal head 41 shown in FIG. Thus, by matching the start time (ss) of the sub-pulse SP applied to the second heat generating element 41D with the end time (me) of the main pulse applied to the first heat generating element 41C, one application Transfer of application pattern data ("OR data" of main pulse data and sub pulse data) within the period F can be omitted once. In, it is possible to further shorten the application period F is constant time, it is possible to further high-speed printing.

  In the tape printer 1 according to the present embodiment, the first heat generating element 41C to which the main pulse MP is applied and the sub pulse SP are applied to the plurality of heat generating elements 41A constituting the line head 41B of the thermal head 41. The two heating elements 41D appear within one application period F (see FIGS. 12 to 15), that is, in each one-line printing process Q (N), Q (N + 1),. However, the main pulse applied to the first heating element 41C is compared with the transfer time Z of the applied pattern data necessary for selectively heating each heating element 41A constituting the line head 41B of the thermal head 41. When the time difference between the end time (me) of MP and the start time (ss) of the sub-pulse SP applied to the second heating element 41D is short, the third drive control of the thermal head 41 shown in FIG. Thus, by matching the end point (me) of the main pulse applied to the first heating element 41C with the start point (ss) of the sub-pulse SP applied to the second heating element 41D, one application Transfer of application pattern data ("OR data" of main pulse data and sub pulse data) within the period F can be omitted once. In, it is possible to further shorten the application period F is constant time, it is possible to further high-speed printing.

[5-2. Summary]
Further, in the tape printing apparatus 1 according to the present embodiment, the second heating element 41D in the plurality of heating elements 41A constituting the line head 41B of the thermal head 41 is controlled by the fourth drive control of the thermal head 41 shown in FIG. The applied pulse width WS of the sub-pulse SP applied to the thermal head 41 is changed based on the environmental data such as the detected temperature Z of the thermal head 41 and the total number of heating dots n for one line. The feedback control based on the detected environment data can be adapted to the new energization correction in, and the print quality can be improved.

  The environmental data may be a voltage applied to the thermal head 41.

  Furthermore, in the tape printing apparatus 1 according to the present embodiment, the thermal pulse 41 has the applied pulse width WS of the sub-pulse SP applied to the second heating element 41D by the fourth drive control of the thermal head 41 shown in FIG. The rectangular pulse RP and the chopping that constitute the main pulse MP applied to the first heating element 41C in response to the change based on the environmental data such as the detected temperature Z and the total number n of heating dots for one line Since the ratio between the applied pulse widths WR and WC of the pulse CP is changed (see S116, FIG. 5 and FIG. 15), the chopper drive control can be adapted to new energization correction in the thermal history control of the thermal head 41. This makes it possible to improve the printing quality.

[6-1. Others]
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the tape printer 1 according to the present embodiment, the first heat generating element 41C to which the main pulse MP is applied and the first pulse SP to which the sub pulse SP is applied, in the plurality of heat generating elements 41A constituting the line head 41B of the thermal head 41. The two heating elements 41D appear within one application period F (see FIGS. 12 to 15), that is, in each one-line printing process Q (N), Q (N + 1),. However, the main pulse applied to the first heating element 41C is compared with the transfer time Z of the applied pattern data necessary for selectively heating each heating element 41A constituting the line head 41B of the thermal head 41. Regardless of whether or not the time difference between the MP end time me and the start time ss of the sub-pulse SP applied to the second heating element 41D is short, the main voltage applied to the first heating element 41C. The start time (ss) of the sub-pulse SP applied to the second heating element 41D is made coincident with the end time (me) of the pulse, or conversely, the end of the main pulse applied to the first heating element 41C If the time point (me) coincides with the start time point (ss) of the sub-pulse SP applied to the second heat generating element 41D, Since the transfer of the additional pattern data ("OR data" of the main pulse data and the sub pulse data) can be omitted once (see FIGS. 2 and 3), the application period F, which is a fixed time, can be further shortened. This makes it possible to achieve higher-speed printing.

[6-2. Others]
Further, in the tape printing apparatus 1 according to the present embodiment, unlike the lower stage of FIG. 12, the main pulse MP corresponding to the subpulse SP is continuously applied without being continued to the subpulse SP applied within the current application period F. Even if it is applied within the application period F, it is possible to further shorten the application period F, which is a fixed time, and therefore it is possible to achieve further high-speed printing.

[6-3. Others]
In the present embodiment, the tape printing apparatus 1 has been described as the “printing apparatus”. However, the present invention can be applied to various thermal printers equipped with the thermal head 41. For example, in the case of a thermal printer in which the print medium is thermal paper, the main heating is to give energy capable of coloring the thermal paper that is the print medium, and the auxiliary heating is the printing by itself. The heat-sensitive paper that is a medium cannot be colored, but in combination with the main heating, it is to give energy that can color the heat-sensitive paper that is a printing medium.

DESCRIPTION OF SYMBOLS 1 Tape printer 2 Tape conveyance motor 31 Surface layer tape 41 Thermal head 41A Heating element 41B Line head 41C 1st heating element 41D 2nd heating element 60 Control part 68 Head drive circuit 70 Conveyance motor drive circuit 73 Thermistor CP Chopping pulse D1 Thermal head Main scanning direction D2 Thermal head sub-scanning direction F Application period L Data transfer time MP Main pulse MS Overlap time zone RP Rectangular pulse SP Sub-pulse WC Chopping pulse application pulse width WS Sub-pulse application pulse width WM Main pulse application pulse width WR Rectangular pulse applied pulse width Z Thermal head detection temperature n Total number of first heating elements ms0 Current main heating start time ms1 Next main heating start time ss0 Current auxiliary heating start time se0 Current auxiliary When heating ends

Claims (4)

A thermal head provided with a line head in which a plurality of heating elements are linearly arranged;
A transport device for transporting a print medium in a sub-scanning direction orthogonal to the line head of the thermal head;
A control device for controlling the transport device and the thermal head;
The control device performs an application process for selectively generating heat in each heating element constituting the line head of the thermal head for each continuous application cycle, thereby causing the thermal head in the sub-scanning direction. A printing device that performs printing by forming printing dots on a printing medium conveyed by the conveyance device,
In each application cycle, in order to form print dots continuous in the sub-scanning direction of the thermal head on the print medium, application of a main pulse as main heating for coloring the print medium starts at the line head of the thermal head It is a certain time from the main heating start time to the next main heating start time,
The control device is not capable of developing the color of the print medium by single application, but is applied with the sub-pulse serving as auxiliary heating that is capable of coloring the print medium by supplementing the main heating by the main pulse applied within the next application cycle. The following restrictions (1) and (2) for each heating element constituting the line head of the thermal head:
(1) Current application that does not color the print medium only when the next application period in which the main pulse that is the main heating for coloring the print medium is applied immediately after the current application period that does not cause the print medium to develop color Applying a sub-pulse within a period,
(2) Main heating among the heating elements constituting the line head of the thermal head within an application cycle in which an application process for selectively heating each heating element constituting the line head of the thermal head is performed. And the second heating element in which auxiliary heating is performed among the heating elements constituting the line head of the thermal head. To match the auxiliary heating start time at which the application of the main pulse to be auxiliary heating starts,
A printing device characterized by being executed under A printing apparatus according to claim 1,
The control device is not capable of developing the color of the print medium by single application, but is applied with the sub-pulse serving as auxiliary heating that is capable of coloring the print medium by supplementing the main heating by the main pulse applied within the next application cycle. In addition to the following restrictions (1) and (2), the following restrictions (3) for each heating element constituting the line head of the thermal head:
(3) The auxiliary heating end point at which the application of the sub-pulse ends within the current application cycle and the main heating start point at which the application of the main pulse starts within the next application cycle,
A printing device characterized by being executed under A printing apparatus according to claim 1 or claim 2, wherein
A detection device for detecting environmental data in the printing device;
The control device includes the thermal head based on detection environment data of the detection device within an application cycle in which an application process for selectively generating heat is performed for each heating element constituting the line head of the thermal head. A printing apparatus comprising: changing a pulse width of a sub-pulse applied to a second heat generating element that performs auxiliary heating among the heat generating elements constituting the line head. A printing device according to claim 3,
The control device includes: a heating element that constitutes the line head of the thermal head within an application cycle in which an application process for selectively heating each heating element that constitutes the line head of the thermal head is performed; The main heating is performed in each of the heating elements constituting the line head of the thermal head in accordance with the change of the applied pulse width of the sub-pulse applied to the second heating element in which the auxiliary heating is performed in When a main pulse for main heating is applied to one heating element, the main pulse is composed of a rectangular pulse and a chopping pulse, and the ratio of the applied pulse width of the rectangular pulse to the applied pulse width of the chopping pulse A printing device characterized by changing the temperature.

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