JP2007038607A - Printer, thermal control method of printer and thermal control program of printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the thermal change of a thermal head to be thermally corrected accurately with reflecting an environmental temperature while accurately detecting the change without time difference. <P>SOLUTION: The time counted from the generation of heat by a heating resistor until the reaction of a thermal-head temperature sensor 51 is shortened by installing the sensor 51 on a ceramic substrate. An environmental temperature coefficient according to the environmental temperature detected by the environmental temperature sensor 52 is read from the environmental temperature coefficients LUT 16a, 16b and 16c. Using the environmental temperature coefficient and the data detected by the thermal-head temperature sensor 51, the thermally corrected value is computed with a predetermined formula. Thereby, the correction accuracy of the density difference caused by the thermal storage and heat dissipation of the thermal head is improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printer device, a printer thermal control method, and a printer thermal control program for correcting color bleeding and density deficiency caused by heat storage and heat dissipation in each member.

  For example, as shown in Patent Document 1, a printer using a thermal head is attached to a thermal head in order to correct color bleeding and insufficient density generated by heat storage and heat dissipation in each member. A thermal correction value is obtained based on the temperature data of the temperature sensor and added to the energization data signal.

  That is, FIG. 6 shows an example of a conventional printer apparatus. In FIG. 6, a main control unit 111 performs overall control of the printer apparatus to which the present invention is applied. Image data is input from the interface 112 and temporarily stored in the storage unit 113. This image data is sent from the storage unit 113 to the data conversion control unit 114. The data conversion control unit 114 converts the input image data into an energization data signal.

  Further, a thermal head temperature sensor 151 for detecting the temperature of the thermal head 121 and an environmental temperature sensor 152 for detecting the environmental temperature where the printer is placed are provided. The detection data of the thermal head temperature sensor 151 and the detection data of the environmental temperature sensor 152 are sent to the heat control unit 115. As will be described later, the thermal control unit 115 obtains a correction value for correcting heat storage and heat dissipation of the thermal head based on the thermal head temperature detection data and the environmental temperature detection data.

  The energization data signal from the data conversion control unit 114 is supplied to the adder 118. Further, the heat correction value obtained by the heat control unit 115 is supplied to the adder 118. The adder 118 adds the heat correction value to the energization data signal from the data conversion control unit 114, and the heat correction data is heat corrected. The heat-corrected energization data signal is supplied to the thermal head 121.

  The thermal head 121 is disposed in the printer mechanism unit 120. In the printer mechanism unit 120, the thermal head 121 and the platen roller 122 are arranged to face each other. The platen roller 122 is rotated by a driving mechanism (not shown).

  As shown in FIG. 7, the thermal head 121 is provided with an array of heating resistors 147 for one line. The thermal head 121 is provided with an IC cover 150 in order to avoid contact between the components mounted on the board and the printing paper.

  A paper roll 125 around which printing paper 124 is wound is stored in the paper box 123. The printing paper 124 is pulled out from the paper roll 125, and the printing paper 124 is inserted between the thermal head 121 and the platen roller 122 facing each other.

  Further, an ink ribbon 128 to which a dye or a pigment is attached is inserted between the thermal head 121 and the platen roller 122 facing each other. Between the thermal head 121 and the platen roller 122 facing each other, the ink ribbon 128 is disposed on the printing paper 124 in an overlapping manner. The ink ribbon 128 is unwound from the ink ribbon roll 126, guided by the guide rollers 129 and 130, and taken up by the ink ribbon core 127.

  An ink ribbon 128 is pressed onto the printing paper 124 between the thermal head 121 and the platen roller 122 facing each other. When the platen roller 122 rotates, the printing paper 124 is fed.

  As described above, the heat-corrected energization data signal is supplied to the thermal head 121, and the heating resistor 147 of the thermal head 121 is energized based on the energization data signal. When an energization data signal is passed through the heat generating resistor of the thermal head 121, the portion generates heat, and the dye on the ink ribbon 128 is sublimated by the heat to develop a color. As a result, the dye or pigment of the ink ribbon 128 is transferred to the printing paper 124 and an image is formed on the printing paper 124.

  The printing paper 124 is sent toward the discharge port 131 and is discharged from the discharge port 131. A cutter 132 for cutting the printing paper 124 into a predetermined size is provided in front of the discharge port 131. When the printing of one image is completed, the printing paper 124 is cut by the cutter 132.

  FIG. 8 is a cross-sectional view showing the configuration of the thermal head 121 in the conventional printer. In FIG. 8, a ceramic substrate 143 is laminated on an aluminum base plate 141 with an adhesive 142. A heat radiating plate 144 is attached to the other surface of the aluminum base plate 141. On the ceramic substrate 143, a glaze layer 146 in which an electrode 145 is disposed is disposed. A heating resistor 147 is provided on the electrode 145 and a protective film 148 is mounted thereon.

  By the way, not all the heat generated in the heating resistor 147 is used for printing, but is also transmitted to the glaze layer 146, the ceramic substrate 143, the aluminum base plate 141, the heat sink 144, etc. constituting the thermal head 121. Is done. The heat conducted to each component causes heat storage and heat dissipation in each member, which is one of the causes of deterioration of the print crystal quality such as color bleeding and insufficient density.

  A thermal head temperature sensor 151 is provided for the purpose of correcting color bleeding and density deficiency caused by heat storage and heat dissipation in each member. As shown in FIG. 8, the thermal head temperature sensor 151 is attached to an aluminum base plate 141 in the conventional printer.

  The environmental temperature sensor 152 for detecting the environmental temperature is not affected by the temperature from the thermal head 121 and can detect the environmental temperature. In this example, as shown in FIG. In the paper box 123.

  Next, a thermal control unit in a conventional printer device will be described. As shown in FIG. 6, the thermal control unit 115 in the conventional printer apparatus includes high-temperature, medium-temperature, and low-temperature thermal correction value generation LUTs (Look Up Tables) 161 a, 161 b, 161 c, and an LUT that is used depending on the environmental temperature. And a table selection unit 163 that selects a table according to the determination result of the determination unit 162. Then, an optimum table is selected from the thermal correction value generation LUTs 161a, 161b, and 161c for high temperature, medium temperature, and low temperature according to the environmental temperature data from the environmental temperature sensor 152, and the selected table is used. Thus, the thermal correction value is obtained from the detection data from the thermal head temperature sensor 151.

  As a specific example, the thermal correction value generation LUT 161a is responsible for an environmental temperature of 30 degrees to 35 degrees (high temperature), and the thermal correction value generation LUT 161b is responsible for an environmental temperature of 10 degrees to 30 degrees (medium temperature). It is assumed that the generated LUT 161c is in charge of an environmental temperature around 10 degrees (low temperature), and the thermal correction value generation LUTs 161a, 161b, and 161c store thermal correction values for the temperature of the thermal head at each environmental temperature.

In this case, if the environmental temperature data from the environmental temperature sensor 152 is 35 degrees, the table selection unit 163 is set on the thermal correction value generation LUT 161a side. The detection data of the thermal head temperature sensor 151 is supplied to the thermal correction value generation LUT 161a, the thermal correction value is read from the thermal correction value generation LUT 161a, and this thermal correction value is supplied to the adder 118. Thus, the heat correction value is added to the energization data signal from the data conversion control unit 114.
JP-A-6-320779

  However, in the above-described conventional printer apparatus, as shown in FIG. 8, the mounting position of the thermal head temperature sensor 151 is on the aluminum base plate 141. Therefore, the heat generated by the heating resistor is conducted through each member. There is a problem that the correction accuracy in the thermal control unit 115 is deteriorated due to a time delay until the thermal head temperature sensor 151 is reached.

  Also, in the preheating function, which is a function of heating the thermal head before printing, it takes time until the heat of the heating resistor reaches the thermal head temperature sensor 151, thereby causing a problem that the surface of the thermal head is heated too much. .

  Further, in the above-described conventional printer device, the thermal correction value generation LUTs 161a, 161b, and 161c are divided into three types for the high temperature range, the intermediate temperature range, and the low temperature range. For this reason, when the environmental temperature is near the boundary of each temperature range (for example, the environmental temperature is intermediate between the low temperature range and the ambient temperature range), there is a problem that the correction accuracy in the thermal control unit is deteriorated.

  SUMMARY OF THE INVENTION In view of the above-described problems, the present invention provides a printer apparatus and a printer that can accurately detect a thermal change of a thermal head without a time difference, and can accurately perform a thermal correction reflecting an environmental temperature. It is an object to provide a thermal control method and a thermal control program for a printer.

  In order to solve the above-described problem, a printer apparatus according to the invention of claim 1 is a printer apparatus that performs thermal correction based on thermal head temperature data detected by a thermal head temperature sensor, and the thermal head is made of aluminum. A ceramic substrate is provided on the base plate, electrodes are arranged on the glaze layer on the ceramic substrate, and a heating resistor is provided, and a thermal head temperature sensor is mounted on the ceramic substrate.

  According to a second aspect of the present invention, there is provided a printer apparatus comprising: a thermal head temperature sensor that detects the temperature of the thermal head; an environmental temperature sensor that detects the environmental temperature; the temperature of the thermal head detected by the thermal head temperature sensor; And thermal control means for performing thermal correction of the concentration difference based on the environmental temperature detected by the sensor, and the thermal control means calculates the environmental temperature correction coefficient according to the environmental temperature data acquired by the environmental temperature sensor. The thermal correction value is calculated from the calculated environmental temperature coefficient and the thermal head temperature data acquired by the thermal head temperature sensor.

  According to a third aspect of the present invention, in the printer device according to the second aspect, the thermal head temperature sensor is mounted on a ceramic substrate.

  According to a fourth aspect of the present invention, in the printer device according to the second aspect, the thermal control means includes a look-up table in which an environmental temperature coefficient corresponding to the environmental temperature is stored in advance.

  According to a fifth aspect of the present invention, there is provided a printer thermal control method comprising: obtaining an environmental temperature detected by an environmental temperature sensor; obtaining a thermal head temperature detected by a thermal head temperature sensor; and an environmental temperature sensor. And calculating a thermal correction value from the calculated environmental temperature coefficient and the thermal head temperature data acquired by the thermal head temperature sensor. It is characterized by doing so.

  According to a sixth aspect of the present invention, there is provided a printer thermal control program comprising: obtaining an environmental temperature detected by an environmental temperature sensor; obtaining a thermal head temperature detected by a thermal head temperature sensor; and an environmental temperature sensor. Obtaining an environmental temperature correction coefficient according to the environmental temperature data acquired in step (b), and calculating a thermal correction value from the obtained environmental temperature coefficient and the thermal head temperature data acquired by the thermal head temperature sensor. It is characterized by doing so.

  According to the present invention, since the thermal head temperature sensor is mounted on the ceramic substrate, the time from the heat generation by the heating resistor to the reaction of the thermal head temperature sensor becomes extremely short. Thereby, it is possible to improve the correction accuracy of the density difference due to heat storage and heat dissipation of the thermal head, and it is possible to reduce the problem of excessive heating even in the preheating function.

  Further, according to the present invention, the thermal correction value is not fixed for each environmental temperature, but is changed according to the environmental temperature. That is, the environmental temperature coefficient corresponding to the environmental temperature is read from the environmental temperature coefficient LUT, and the thermal correction value is calculated by a predetermined calculation formula using the environmental temperature coefficient. For this reason, it is possible to improve the correction accuracy of the density difference due to heat storage and heat dissipation of the thermal head.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a printer apparatus to which the present invention is applied.

  In FIG. 1, a main control unit 11 performs overall control of a printer apparatus to which the present invention is applied. Image data is input from the interface unit 12 and temporarily stored in the storage unit 13. This image data is sent from the storage unit 13 to the data conversion control unit 14. The data conversion control unit 14 converts the input image data into an energization data signal.

  A thermal head temperature sensor 51 for detecting the temperature of the thermal head 21 and an environmental temperature sensor 52 for detecting the environmental temperature where the printer is placed are provided. The detection data of the thermal head temperature sensor 51 and the detection data of the environmental temperature sensor 52 are sent to the heat control unit 15.

  The thermal control unit 15 calculates a correction value for correcting the heat storage and heat dissipation of the thermal head 21 based on the head temperature detection data and the environmental temperature detection data. The calculation of the heat correction value will be described later.

  The energization data signal from the data conversion control unit 14 is supplied to the adder 18. Further, the heat correction value obtained by the heat control unit 15 is supplied to the adder 18. The adder 18 adds the heat correction value to the energization data signal from the data conversion control unit 14 and heat corrects the heat correction data. The heat-corrected energization data signal is supplied to the thermal head 21.

  The thermal head 21 is disposed in the printer mechanism unit 20. In the printer mechanism unit 20, the thermal head 21 and the platen roller 22 are arranged to face each other. The platen roller 22 is rotated by a driving mechanism (not shown). The thermal head 21 is provided with an array of heating resistors for one line.

  A paper roll 25 around which printing paper 24 is wound is stored in the paper box 23. The printing paper 24 is pulled out from the paper roll 25, and the printing paper 24 is inserted between the thermal head 21 and the platen roller 22 facing each other.

  Further, an ink ribbon 28 to which a dye or a pigment is attached is inserted between the thermal head 21 and the platen roller 22 facing each other. Between the thermal head 21 and the platen roller 22, the ink ribbon 28 is disposed on the printing paper 24 so as to overlap. The ink ribbon 28 is unwound from the ink ribbon roll 26, guided by guide rollers 29 and 30, and taken up by the ink ribbon core 27.

  The ink ribbon 28 is pressed onto the printing paper 24 between the thermal head 21 and the platen roller 22 facing each other. When the platen roller 22 rotates, the printing paper 24 is fed.

  The thermal head 21 is supplied with a heat-corrected energization data signal, and the heating resistor of the thermal head 21 is energized based on the energization data signal. When an energization data signal is passed through the heating resistor of the thermal head 21, the portion generates heat, and the dye on the ink ribbon 28 is sublimated by the heat to develop a color. As a result, the dye or pigment of the ink ribbon 28 is transferred to the printing paper 24 and an image is formed on the printing paper 24.

  The printing paper 24 is sent toward the discharge port 31 and is discharged from the discharge port 31. A cutter 32 for cutting the printing paper 24 into a predetermined size is provided in front of the discharge port 31. When the printing of one image is completed, the printing paper 24 is cut by the cutter 32.

  FIG. 2 is a cross-sectional view showing the configuration of the thermal head 21 in the embodiment of the present invention. In FIG. 2, a ceramic substrate 43 is laminated on an aluminum base plate 41 by an adhesive 42. A heat radiating plate 44 is attached to the other surface of the aluminum base plate 41. On the ceramic substrate 43, a glaze layer 46 in which an electrode 45 is disposed is disposed. The electrode 45 is provided with a heating resistor 47 and is covered with a protective film 48.

  In the printer to which the present invention is applied, the thermal head temperature sensor 51 is attached to the ceramic substrate 43 as shown in FIG. For this reason, the time from the heat generation by the heating resistor 47 to the reaction of the thermal head temperature sensor 51 becomes extremely short. Thereby, the correction accuracy of the density difference due to heat storage and heat dissipation of the thermal head 21 can be improved, and the problem of excessive heating in the preheating function can be reduced.

  In addition, the environmental temperature sensor 52 for detecting the environmental temperature is installed in the paper box 23 in FIG. 1 where the environmental temperature can be detected without being influenced by the temperature from the thermal head 21.

  Next, the thermal control unit in the embodiment of the present invention will be described. The thermal control unit 15 in FIG. 1 uses environmental temperature coefficient generation LUTs 16a, 16b, and 16c that generate an environmental temperature coefficient according to the environmental temperature, and a correction value for correcting heat storage and heat dissipation of the thermal head by a predetermined calculation formula. And a correction value calculation unit 17 for calculating. In the correction value calculation unit 17, for example, the heat correction value Y is calculated by a calculation formula as shown in the following formula (1).

Y = a · Th ² + b · Th + c (1)
Th: Thermal head detection temperature a, b, c: Environmental temperature coefficient

  The environmental temperature coefficient generation LUTs 16a, 16b, and 16c store optimum environmental temperature coefficients that are obtained in advance. When the environmental temperature detection data from the environmental temperature sensor 52 is supplied to the environmental temperature coefficient generation LUTs 16a, 16b, and 16c, the environmental temperature coefficient generation LUTs 16a, 16b, and 16c respectively provide the optimum environmental temperature with respect to the environmental temperature. Coefficients a, b, and c are output, respectively.

  The correction value calculation unit 17 calculates the environmental temperature coefficients a, b, and c and the thermal head detection temperature Th acquired by the thermal head temperature sensor 51 using the calculation formula (1). Thus, the thermal correction value Y is calculated. In addition, the calculation formula of the thermal correction value of the formula (1) is an example, and various other calculation formulas for obtaining the thermal correction value are conceivable.

  3 and 4 are flowcharts showing the operation of the printer apparatus to which the present invention is applied. In this example, as shown in FIG. 5, a printer apparatus 1 to which the present invention is applied and a host computer 2 are connected, and image data from the host computer 2 is printed out by the printer apparatus 1.

  In FIG. 3, the application software 61 of the host computer 2 transmits the created image data to the printer driver 62 (step S1).

  The printer driver 62 receives the image data from the application software 61 (step S2). Then, the printer status is confirmed (step S3). If the printer status is normal, the image data is transmitted to the printer (step S4). If there is an abnormality in the printer state, an error is returned to the application software 61 (step S5).

  The image data transmitted in step S4 is sent from the host computer 2 to the printer apparatus 1 and received via the interface unit 12 inside the printer (step S6).

  The image data received via the interface unit 12 is temporarily stored in the storage unit 13 and then sent to the data conversion control unit 14 where the image data is converted into an energized data signal ( Step S7).

  In addition, the thermal control unit 15 uses the thermal head temperature sensor 51 and the environmental temperature sensor 52 as a trigger for the image data input to the interface unit 12 in the printer as a trigger. Is acquired (step S8). Then, a thermal correction value for correcting heat storage and heat dissipation of the thermal head is calculated using a calculation formula as shown in formula (1) (step S9).

  Thereafter, the energization data signal converted by the data conversion control unit 14 and the heat correction value calculated by the heat control unit 15 are added to generate a heat-corrected energization data signal (step S10). The energization data signal subjected to the heat correction is transmitted to the thermal head 21 (step S11), and printing is performed (step S12).

  FIG. 4 is a flowchart showing the processing (steps S8 and S9) of the step of calculating the thermal correction value for correcting the heat storage and heat dissipation of the thermal head in step S9.

  In FIG. 4, the environmental temperature data from the environmental temperature sensor 52 is acquired (step S21), and the environmental temperature coefficient a, b optimum for the current environmental temperature is obtained from the environmental temperature data by the environmental temperature coefficient generation LUTs 16a, 16b, 16c. , C are obtained (step S22). Further, the thermal head temperature data Th from the thermal head temperature sensor 51 is acquired (step S23). Then, from the environmental temperature coefficients a, b, c obtained from the environmental temperature coefficient generation LUTs 16a, 16b, 16c and the thermal head temperature data Th from the thermal head temperature sensor 51, thermal correction is performed using the equation (1). A value is calculated (step S24).

  As described above, in the printer device to which the present invention is applied, the thermal head temperature sensor 51 is mounted on the ceramic substrate 43. For this reason, the time from the heat generation by the heating resistor 47 to the reaction of the thermal head temperature sensor 51 becomes extremely short. Thereby, the correction accuracy of the density difference due to heat storage and heat dissipation of the thermal head 21 can be improved, and the problem of excessive heating in the preheating function can be reduced.

  In the printer apparatus to which the present invention is applied, the thermal correction value is not fixed for each environmental temperature, but is changed according to the environmental temperature. That is, the environmental temperature coefficient corresponding to the environmental temperature is read from the environmental temperature coefficient LUTs 16a, 16b, and 16c, and the thermal correction value is calculated by a predetermined calculation formula using the environmental temperature coefficient. For this reason, it is possible to improve the correction accuracy of the density difference due to heat storage and heat dissipation of the thermal head.

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention.

  For example, the position of the thermal head temperature sensor on the thermal head is installed on two ceramic substrates and an aluminum base plate, the heat conduction speed is calculated from the temperature difference between them, and this data is applied to temperature correction. By doing so, the same effect can be obtained.

  Regarding temperature correction, the thermal correction value is obtained from the two temperature data of the environmental temperature sensor and the thermal head temperature sensor. In addition to this, the data of sensors installed at different positions on the thermal head as described above are used. The same effect can be obtained by performing a correction calculation using, or using the printer external temperature and thermal head temperature as the environmental temperature, or the space temperature and thermal head temperature around the thermal head.

  Note that a program for realizing the processing functions described above may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention can be used for thermal control for correcting color bleeding and insufficient density generated by heat storage and heat dissipation in each member in a thermal head type printer.

1 is a block diagram illustrating a configuration of a printer apparatus to which the present invention is applied. It is sectional drawing which shows the structure of the thermal head in the printer apparatus with which this invention was applied. 4 is a flowchart used for explaining thermal control in a printer apparatus to which the present invention is applied. 4 is a flowchart used for explaining thermal control in a printer apparatus to which the present invention is applied. 1 is a block diagram illustrating a configuration of a print system in a printer apparatus to which the present invention is applied. It is a block diagram which shows the structure of the conventional printer apparatus. It is a top view which shows the structure of the thermal head in the conventional printer apparatus. It is sectional drawing which shows the structure of the thermal head in the conventional printer apparatus.

Explanation of symbols

11: Main control unit,
12: Interface part
13: storage unit,
14: Data conversion control unit,
15: Thermal control unit,
16a-16b: Environmental temperature coefficient generation LUT,
17: correction value calculation unit,
21: Thermal head,
22: Platen roller,
24: Printing paper,
28: Ink ribbon
41: Aluminum base plate,
42: adhesive,
43: Ceramic substrate,
44: heat sink,
45: Electrode,
46: Glaze layer,
47: heating resistor,
48: Protective film,
51: Thermal head temperature sensor,
52: Environmental temperature sensor

Claims (6)

A printer device that performs thermal correction based on thermal head temperature data detected by a thermal head temperature sensor,
The thermal head is configured such that a ceramic substrate is provided on an aluminum base plate, an electrode is disposed on the glaze layer on the ceramic substrate, and a heating resistor is provided.
A printer apparatus, wherein the thermal head temperature sensor is mounted on the ceramic substrate. A thermal head temperature sensor for detecting the temperature of the thermal head;
An environmental temperature sensor for detecting the environmental temperature;
Thermal control means for performing thermal correction of the density difference based on the temperature of the thermal head detected by the thermal head temperature sensor and the environmental temperature detected by the environmental temperature sensor;
The thermal control means calculates an environmental temperature correction coefficient in accordance with the environmental temperature data acquired by the environmental temperature sensor, and calculates the environmental temperature coefficient and the thermal head temperature data acquired by the thermal head temperature sensor. A printer device characterized in that a thermal correction value is calculated from   The printer apparatus according to claim 2, wherein the thermal head temperature sensor is mounted on the ceramic substrate.   The printer apparatus according to claim 2, wherein the thermal control unit includes a lookup table in which an environmental temperature coefficient corresponding to the environmental temperature is stored in advance. Obtaining the environmental temperature detected by the environmental temperature sensor;
Acquiring the temperature of the thermal head detected by the thermal head temperature sensor;
Obtaining an environmental temperature correction coefficient according to environmental temperature data acquired by the environmental temperature sensor;
A printer thermal control method comprising: calculating a thermal correction value from the obtained environmental temperature coefficient and thermal head temperature data acquired by the thermal head temperature sensor. Obtaining the ambient temperature detected by the ambient temperature sensor;
Acquiring the temperature of the thermal head detected by the thermal head temperature sensor;
Obtaining an environmental temperature correction coefficient according to the environmental temperature data acquired by the environmental temperature sensor;
A thermal control program for a printer, comprising: calculating a thermal correction value from the obtained environmental temperature coefficient and thermal head temperature data acquired by the thermal head temperature sensor.

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