JPH06297748A - Thermal printer - Google Patents

Abstract

PURPOSE:To easily perform high-grade printing by suppressing the irregularity of printing quality regardless of the difference of environment where a thermal printers is used or the difference in the kind of thermal paper by appropriately determining the pulse width inputted to a thermal head by fuzzy inference. CONSTITUTION:In a thermal printer, a thermal head 9 is brought into close contact with processed paper developing a color under heating to develop the processed paper. In this case, the temp. of the thermal head 9 is detected by a head temp, detection part 1. Further, the temp. in the periphery of the printing part of the thermal printer is detected by a printing part periphery temp. detection part 2. The detected temps. are inputted to infer the pulse width of the thermal head 9 in a fuzzy inference part 7. Corresponding to the fuzzy inference result, the driving of the thermal head 9 is controlled by a head driving control part 8. By this constitution, the irregularity of printing quality is suppressed regardless of the difference of environment where the thermal printer is used or the difference of the kind of thermal paper and high quality printing is easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal printer device, and more particularly, it can be applied to a printing pulse width control technique of a thermal printer and also to a device for printing on thermal paper such as a facsimile and a cash register. In particular, the present invention relates to a thermal printer device that can easily perform high-quality printing even when various external factors change.

[0002]

2. Description of the Related Art Conventionally, a print density fuzzy control device for a thermal head has been disclosed in, for example, Japanese Patent Laid-Open No. 3-38555, and here, the temperature of a heat sensitive element, an application period, and a ticketing period are input. By using the fuzzy inference to control the print density, there is an advantage that the print density can be kept constant and good print quality can be secured.

[0003]

In the above-described conventional thermal printer device, the temperature of the heat sensitive element, the application cycle to the dot pin, and the ticketing processing cycle are input to the fuzzy inference section, and the voltage applied to the thermal head is controlled. However, this does not take into consideration the difference in the environment in which the device is used, the difference in the type of thermal paper, the difference in the characteristics of the thermal head itself, etc. However, there is a problem that it is difficult to perform high quality printing.

Therefore, in the present invention, the pulse width input to the thermal head is appropriately determined by using fuzzy inference, so that the environment in which the apparatus is used, the type of thermal paper, and the characteristics of the thermal head itself are different. It is an object of the present invention to provide a thermal printer device capable of suppressing variations in print quality even when such problems occur and easily performing high-quality printing even when various external factors change.

[0005]

The invention according to claim 1 is
In a thermal printer device that develops by bringing a thermal head into close contact with a processed paper that heats and develops color, thermal head temperature measuring means for measuring the temperature of the thermal head,
A print part peripheral temperature measuring means for measuring the temperature around the print part inside the apparatus, the thermal head temperature measured by the thermal head temperature measuring means, and the print part peripheral temperature measured by the print part peripheral temperature measuring means. And a thermal head control means for controlling the pulse width of the thermal head on the basis of fuzzy inference.

According to a second aspect of the present invention, in a thermal printer device for developing a thermal head by closely adhering the thermal head to a processed paper that is heated to develop color, the thermal head temperature measuring means for measuring the temperature of the thermal head and the inside of the device. Internal humidity measuring means for measuring the humidity of the thermal head, and the pulse of the thermal head with the information of the thermal head temperature measured by the thermal head temperature measuring means and the internal humidity of the apparatus measured by the internal humidity measuring means as inputs. And a thermal head control means for controlling the width based on fuzzy inference.

According to a third aspect of the present invention, there is provided a thermal printer device for measuring the temperature of the thermal head in a thermal printer device for adhering a thermal head to a processed paper which is heated to develop a color to develop the thermal head, and to the device. Equipped with a processed paper surface measuring means for measuring the smoothness of the surface of the processed paper, the thermal head temperature measured by the thermal head temperature measuring means and the processed paper surface smoothness measured by the processed paper surface measuring means. And a thermal head control means for controlling the pulse width of the thermal head on the basis of fuzzy inference.

According to a fourth aspect of the present invention, in a thermal printer device for developing a thermal head by bringing a thermal head into close contact with a processed paper which is heated to develop color, the thermal head temperature measuring means for measuring the temperature of the thermal head and the device are provided. A processed paper print density measuring means for measuring the density printed on the processed paper;
A thermal head for controlling the pulse width of the thermal head based on fuzzy inference by inputting information of the thermal head temperature measured by the thermal head temperature measuring means and the processed paper print density measured by the processed paper print density measuring means. It has a control means.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the thermal head control means infers by combining any information of the input information to the fuzzy inference section. It is characterized in that the pulse width of the thermal head is controlled.

[0010]

According to the first aspect of the invention, in a thermal printer device in which a thermal head is brought into close contact with a processed paper which is heated to develop a color, the temperature of the thermal head is measured by a thermal head temperature measuring means, and the inside of the device is measured. After the temperature around the printing portion is measured by the printing portion surrounding temperature measuring means, the temperature between the thermal head temperature measured by the thermal head temperature measuring means and the printing portion surrounding temperature measured by the printing portion surrounding temperature measuring means The pulse width of the thermal head can be appropriately controlled by the thermal head control means based on fuzzy inference using information as an input. Therefore, not only the temperature of the thermal head itself but also the temperature around the printing unit can be input for fuzzy reasoning, so even if differences occur in the environment in which the device is used, variations in printing quality can be efficiently suppressed. High-quality printing can be easily performed.

According to a second aspect of the present invention, in a thermal printer device in which a thermal head is brought into close contact with a processed paper which is heated to develop a color, the temperature of the thermal head is measured by a thermal head temperature measuring means, and the inside of the device is measured. Of the thermal head after inputting the information of the thermal head temperature measured by the thermal head temperature measuring means and the internal humidity of the apparatus measured by the internal humidity measuring means after the humidity of the thermal head is measured by the internal humidity measuring means of the device. The pulse width can be appropriately controlled by the thermal head control means based on fuzzy inference. For this reason, not only the temperature of the thermal head itself but also the humidity inside the device can be input for fuzzy reasoning, so even if there are differences in the environment in which the device is used, variations in print quality can be efficiently suppressed and high values can be obtained. It is possible to print quality.

According to a third aspect of the present invention, in a thermal printer device in which a thermal head is brought into close contact with a processed paper which is heated to develop a color, the temperature of the thermal head is measured by a thermal head temperature measuring means, After measuring the smoothness of the surface of the equipped processed paper by means of the processed paper surface measuring means, the thermal head temperature measured by the thermal head temperature measuring means and the processed paper surface measured by the processed paper surface measuring means The pulse width of the thermal head can be appropriately controlled by the thermal head control means on the basis of fuzzy inference using information on smoothness as an input. Therefore, even if there are various types of processed paper, the smoothness of the surface of the processed paper can be detected and used as the input for fuzzy inference. High-quality printing can be easily performed with efficient suppression.

According to a fourth aspect of the present invention, in a thermal printer device in which a thermal head is brought into close contact with a processed paper which is heated to develop a color, the temperature of the thermal head is measured by a thermal head temperature measuring means. Information on the thermal head temperature measured by the thermal head temperature measuring means and the processed paper print density measured by the processed paper print density measuring means after the density printed on the processed paper is measured by the processed paper print density measuring means. The pulse width of the thermal head can be appropriately controlled by the thermal head control means on the basis of fuzzy inference by inputting. For this reason, the printing density of the characters printed by the device itself can be input to the input of fuzzy inference, so even if the specifications of the processed paper or the thermal head differ, the variation in printing quality can be efficiently suppressed and high quality can be achieved. Can be easily printed.

According to a fifth aspect of the present invention, in the above-mentioned first to fourth aspects of the invention, the pulse width of the thermal head is inferred by combining and inferring arbitrary information out of the input information to the fuzzy inference section. It can be controlled appropriately by the thermal head control means. Therefore, even when the detected value is out of the range or the rule is not established, it is possible to appropriately select an appropriate input to the fuzzy inference unit, so that even if the detected value shows an abnormal value. It is possible to efficiently suppress variations in print quality and easily perform high-quality printing.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a fuzzy control unit applied to a thermal printer device according to each embodiment of the present invention. In FIG. 1, 1 is a head temperature detecting unit that detects the temperature of the thermal head itself, 2 is a printing unit ambient temperature detecting unit that detects the temperature around the printing unit inside the apparatus, and 3 is the humidity inside the apparatus. An internal humidity detection unit for detecting the temperature is shown. Reference numeral 4 is a paper smoothness detection unit for detecting the smoothness of the thermal paper which is set in the device and is colored by heating. Next, 5 is a print density detecting section for detecting the density printed by the apparatus itself on the thermal paper, and 6 is a head temperature detecting section 1, a print section ambient temperature detecting section 2, an apparatus internal humidity detecting section 3, a paper smoothness detecting section. It is an input selector for selecting a plurality of outputs from the detection units of the copy unit 4 and the print density detection unit 5 according to a command from the CPU 10 and inputting them to the fuzzy inference unit 7. The fuzzy inference unit 7 uses the input selector 6 Fuzzy inference is performed from the selected input value and the fuzzy inference result is passed to the head drive control unit 8. The head drive control unit 8 receives an appropriate fuzzy inference result from the fuzzy inference unit 7, and actually receives the thermal head. The heating cycle (pulse width) is set to 9.
Next, the thermal head 9 has heating elements for the required number of pixels, and these heating elements are arbitrarily heated to print on the thermal paper arranged in contact with the CPU.
Reference numeral 10 is composed of a microcomputer that controls the above-mentioned units. 11 is a ROM that stores programs to be executed by the CPU 10, table data that the programs refer to, and 12 is a RAM that stores various types of information during control. This RAM 12 is stored differently from the ROM 11. You can read and rewrite the data. Reference numeral 13 is a system bus for exchanging data between blocks.

Each embodiment of the present invention will be described below. In each embodiment, the invention is applied to a facsimile, a printer, etc. using a parallel recording type of thermal recording. (Embodiment 1) In this embodiment (claim 1), the fuzzy control unit of FIG. 1 is used. In the parallel recording type thermal printing, printing and scanning of thermal paper are usually performed line by line. First, the head temperature detection unit 1 detects the current temperature of the thermal head 9 before starting printing, and at the same time, the printing unit peripheral temperature detection unit 2 detects the temperature around the printing unit, and then these values are fuzzy inference unit. Type in 7. on the other hand,
The fuzzy inference unit 7 performs fuzzy inference according to the rules as shown in the membership function and fuzzy rule example of FIG. 2 and outputs the pulse width of the thermal head 9 of the first line. The output pulse width of the thermal head 9 is input to the head drive control unit 8 to start printing the first line. Then, the fuzzy inference as described above is executed during the printing of the previous line even for the second and subsequent lines to determine the pulse width of the thermal head 9.

In the present invention, the inputs to the fuzzy inference unit 7 are the thermal head temperature TH and the print unit ambient temperature TM, and the output of the fuzzy inference unit 7 is the pulse width W. As an example of the membership function, when the thermal head temperature TH is 3 levels, the membership function based on the temperature of the thermal head of FIG. 8 is used, and when the print part peripheral temperature TM is 2 levels, FIG. The membership function based on the ambient temperature of the print area is used, and when the pulse width W is 5 levels, the membership function based on the pulse width of FIG. 10 is used. As an example of the fuzzy rule, if the thermal head temperature TH is high, the pulse width W is reduced, and if the thermal head temperature TH is medium, the pulse width W is set as the default, and if the thermal head temperature TH is low, The pulse width W is increased, and if the print part peripheral temperature TM is high, the pulse width W is decreased a little, and if the print part peripheral temperature TM is low, the pulse width W is increased a little.

Here, when the thermal head temperature TH and the print portion peripheral temperature TM actually reach 100 (MAX) at 100, the thermal head temperature TH = 60, the print portion peripheral temperature T.
The value of the pulse width W of the fuzzy inference result when M = 40 will be obtained using the centroid method with reference to FIG. When the thermal head temperature TH = 60, the thermal head 9 as shown in FIG.
In the case of the membership function based on the temperature of, the rule is hit when the thermal head temperature TH is high and medium. The pulse width W of the fuzzy inference result at these times is the shaded portions A to C as shown in FIG. Similarly, the pulse width W of the fuzzy inference result when the temperature TM around the printing portion is 40 is
As shown in FIG. 3, the shaded portions of D and E are formed. And these A
The barycentric values of the shaded parts from to E are the inference result output from the fuzzy inference unit 7, that is, the pulse width. Note that similar fuzzy inference is performed in Examples 2 to 5 described later.

As described above, in this embodiment, the temperature of the thermal head 9 is measured by the head temperature detecting unit 1, the temperature around the printing unit inside the apparatus is measured by the printing unit surrounding temperature detecting unit 2, and then the head temperature is measured. Based on the fuzzy inference in the fuzzy inference unit 7, the pulse width of the thermal head 9 is input with temperature information of the thermal head temperature measured by the detection unit 1 and the surrounding temperature of the printing unit measured by the detection unit 2 as input. The drive control unit 8 is configured to perform appropriate control.
For this reason, not only the temperature of the thermal head 9 itself but also the temperature around the printing portion can be input as the fuzzy inference, so that even if a difference occurs in the environment in which the device is used, variations in the printing quality can be made efficiently. High-quality printing can be easily performed by suppressing. (Embodiment 2) This embodiment (Claim 2) also uses the fuzzy controller shown in FIG. In this embodiment, as described in the explanation of the operation of the first embodiment, fuzzy inference is performed for each line to determine the pulse width. First, after inputting the temperature of the thermal head 9 and the humidity inside the apparatus to the fuzzy reasoning 7, fuzzy reasoning is performed according to the rules as shown in the membership function and fuzzy rule example of FIG. 4 to determine the pulse width.

In this embodiment, the inputs to the fuzzy inference unit 7 are the thermal head temperature TH and the internal humidity H of the apparatus, and the output of the fuzzy inference unit 7 is the pulse width W. As an example of the membership function, when the thermal head temperature TH is 3 levels, the membership function based on the temperature of the thermal head of FIG. 8 is used, and when the apparatus internal humidity H is 2 levels, the membership function of FIG. The membership function based on the internal humidity of the apparatus is used. When the pulse width W is 5 levels, the membership function based on the pulse width of FIG. 10 is used. As an example of the fuzzy rule, if the thermal head temperature TH is high, the pulse width W is reduced, and the thermal head temperature T is used as an example.
If H is medium, the pulse width W is set as the default. If the thermal head temperature TH is low, the pulse width W is increased, and if the internal humidity H of the apparatus is high, the pulse width W is slightly decreased. If internal humidity H is low, pulse width W
A little larger.

As described above, in the present embodiment, the temperature of the thermal head 9 is measured by the head temperature detecting section 1, the humidity inside the apparatus is measured by the apparatus internal humidity detecting section 3, and then the head temperature detecting section 1 is measured. The pulse width of the thermal head 9 is appropriately controlled by the head drive control unit 8 based on the fuzzy inference in the fuzzy inference unit 7 by inputting the information of the thermal head temperature and the in-device humidity measured by the in-device humidity detecting unit 3 as inputs. Is configured as follows. Therefore, not only the temperature of the thermal head 9 itself but also the humidity inside the apparatus can be used as an input for fuzzy reasoning, and even if a difference occurs in the environment in which the apparatus is used, variations in print quality can be efficiently suppressed and the high quality can be achieved. It is possible to easily print quality.

It is generally known that when the humidity is high, a large amount of water is liable to cause a chemical reaction, and the print density tends to be high. If the print density is too high, it becomes impossible to make a rule. If it is out of the range, fuzzy inference may not be executed. (Embodiment 3) This embodiment (Claim 3) also uses the fuzzy controller of FIG. In this embodiment, as described in the explanation of the operation of the first embodiment, fuzzy inference is performed for each line to determine the pulse width. First, after inputting the thermal head temperature and the smoothness of the surface of the thermal paper to the fuzzy inference unit 7, fuzzy inference is performed according to the rules shown in the membership function and fuzzy rule example of FIG. 5 to determine the pulse width. To do.

In this embodiment, the input to the fuzzy inference unit 7 is the thermal head temperature TH and the smoothness N of the surface of the thermal paper, and the output of the fuzzy inference unit 7 is the pulse width W.
And As an example of the membership function, when the thermal head temperature TH is 3 levels, the membership function based on the temperature of the thermal head in FIG. 8 is used, and when the smoothness N of the thermal paper surface is 2 levels, The membership function based on the smoothness of the surface of the thermal paper in FIG. 12 is used, and when the pulse width W is 5 levels, the membership function based on the pulse width in FIG. 10 is used. As an example of the fuzzy rule, if the thermal head temperature TH is high, the pulse width W is reduced, and if the thermal head temperature TH is medium, the pulse width W is set as the default,
If the thermal head temperature TH is low, the pulse width W is increased, and if the thermal paper surface has a high smoothness N (smooth), the pulse width W is decreased slightly.
If the smoothness N of the thermal paper surface is low (not smooth), the pulse width W is increased a little.

As described above, in this embodiment, after the temperature of the thermal head 9 is measured by the head temperature detecting section 1 and the surface smoothness of the thermal paper equipped in the apparatus is measured by the paper smoothness detecting section 4. The fuzzy inference unit 7 receives the pulse width of the thermal head 9 by inputting information about the thermal head temperature measured by the head temperature detection unit 1 and the smoothness of the thermal paper surface measured by the paper smoothness detection unit 4.
The head drive control unit 8 is configured to perform appropriate control based on the fuzzy inference in (1). Therefore, the smoothness of the thermal paper surface can be detected and used as the input for fuzzy inference even when there are various types of thermal paper. Can be efficiently suppressed and high-quality printing can be easily performed.

Generally, the smoother the surface of the thermal paper is, the more easily heat is transferred and the higher the print density tends to be. However, it cannot be said that the paper having the surface coated is such a case. In that case, fuzzy inference may not be executed. (Fourth Embodiment) This embodiment (Claim 4) also uses the fuzzy controller shown in FIG. In this embodiment, as described in the explanation of the operation of the first embodiment, fuzzy inference is performed for each line to determine the pulse width. First, after inputting the temperature of the thermal head and the density printed by the apparatus itself into the fuzzy inference unit 7,
The pulse width is determined by performing fuzzy inference according to the rules shown in the example of the membership function and fuzzy rule in FIG.

In this embodiment, the input to the fuzzy inference unit 7 is the thermal head temperature TH and the print density D, and the output of the fuzzy inference unit 7 is the pulse width W. As an example of the membership function, when the thermal head temperature TH is 3 levels, the membership function based on the thermal head temperature of FIG. 8 is used, and when the printing density D is 2 levels, the printing density of FIG. When the pulse width W is 5 levels, the membership function based on the pulse width shown in FIG. 10 is used. Examples of fuzzy rules are:
If the thermal head temperature TH is high, the pulse width W is reduced. If the thermal head temperature TH is medium, the pulse width W is set as the default. If the thermal head temperature TH is low, the pulse width W is increased. If the print density D is high, the pulse width W is slightly reduced, and if the print density D is low, the pulse width W is slightly increased.

As described above, in this embodiment, the temperature of the thermal head 9 is measured by the head temperature detecting unit 1, the density printed on the thermal paper by the apparatus is measured by the print density detecting unit 5, and then the head temperature detecting unit is measured. The pulse width of the thermal head 9 is appropriately controlled by the head drive control unit 8 based on the fuzzy inference in the fuzzy inference unit 7 with the information of the thermal head temperature measured in 1 and the print density measured in the print density detecting unit 5 as inputs. Configured to do so. For this reason, the printing density of the characters printed by the device itself can be input to the input of fuzzy inference, so even if the specifications of the thermal paper or thermal head differ, the variation in printing quality can be efficiently suppressed and high quality can be achieved. Can be printed. (Fifth Embodiment) This embodiment (Claim 5) also uses the fuzzy control unit shown in FIG. In this embodiment, the input selector 6 is a switch so that the CPU 10 can control which detection value is taken into the fuzzy inference unit 7. For example, as described in the explanation of the operation of the second embodiment, when the input value is out of the range or the rules are inconsistent,
An appropriate input can be arbitrarily selected by a command from the CPU 10. Therefore, in this embodiment, it is detected whether or not an appropriate input value is input before printing is started, and the most appropriate fuzzy input is selected based on the result. FIG. 7 shows an example of the membership function and fuzzy rule when all the input values in this embodiment are input to the fuzzy inference unit 7.

In this embodiment, the inputs to the fuzzy inference unit 7 are the thermal head temperature TH, the print unit ambient temperature TM, the internal humidity H of the apparatus, and the smoothness N of the surface of the thermal paper.
And the print density D, and the output of the fuzzy inference unit 7 is the pulse width W. As an example of the membership function, when the thermal head temperature TH is 3 levels, the membership function based on the temperature of the thermal head of FIG. 8 is used, and when the print part peripheral temperature TM is 2 levels, FIG. Using the membership function based on the ambient temperature of the printing area of the
When the level is 2 levels, the membership function based on the internal humidity of the device in Fig. 11 is used. When the smoothness N of the thermal paper surface is 2 levels, the member based on the smoothness of the thermal paper surface in Fig. 12 is used. When the ship function is used and the print density D is 2 levels, the membership function based on the print density of FIG. 13 is used, and when the pulse width W is 5 levels,
The membership function based on the pulse width in Fig. 10 is used.
As an example of the fuzzy rule, if the thermal head temperature TH is high, the pulse width W is reduced, and if the thermal head temperature TH is medium, the pulse width W is set as the default, and if the thermal head temperature TH is low, , If the pulse width W is increased and the printing portion ambient temperature TM is high, the pulse width W is slightly reduced, and the printing portion ambient temperature T is temporarily reduced.
If M is low, the pulse width W is increased a little. If the internal humidity H of the apparatus is high, the pulse width W is decreased a little. If the internal humidity H of the apparatus is low, the pulse width W is increased a little. If the smoothness N of the surface is high (smooth), the pulse width W is made small, and if the smoothness N of the surface of the thermal paper is low (not smooth), the pulse width W is made slightly large, and the print density D is temporarily set. If the density is high, the pulse width W is reduced a little and the print density D
If it is thin, the pulse width W is increased a little.

As described above, in this embodiment, the pulse width of the thermal head 9 is appropriately controlled by the head drive control section 8 by inferring by combining arbitrary information among the input information to the fuzzy inference. ing. Therefore, even if the detected value is out of range or the rule does not hold,
Since an appropriate one can be appropriately selected as an input to the fuzzy inference unit 7, even if the detected value shows an abnormal value, the print quality density variation can be efficiently performed and high-quality printing can be easily performed.

[0030]

According to the present invention, the pulse width input to the thermal head is appropriately determined by using fuzzy inference, so that the environment in which the apparatus is used, the type of thermal paper, and the thermal head itself are different. Even if there is a difference in characteristics, it is possible to easily suppress high-quality printing from variations in print quality, and it is possible to easily perform high-quality printing even when various external factors change. is there.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a fuzzy control unit applied to a thermal printer device according to each embodiment of the present invention.

FIG. 2 is a diagram showing examples of input / output, membership functions, and fuzzy rules according to the first embodiment of the present invention.

FIG. 3 is a head temperature TH = 6 according to the first embodiment of the present invention.
It is a figure which shows the fuzzy reasoning result W at the time of 0 and printing part circumference temperature TM = 40.

FIG. 4 is a diagram showing examples of input / output, membership functions, and fuzzy rules according to the second embodiment of the present invention.

FIG. 5 is a diagram showing examples of input / output, membership functions, and fuzzy rules according to the third embodiment of the present invention.

FIG. 6 is a diagram showing examples of input / output, membership functions, and fuzzy rules according to the fourth embodiment of the present invention.

FIG. 7 is a diagram showing examples of input / output, membership functions, and fuzzy rules according to the fifth embodiment of the present invention.

FIG. 8 is a diagram showing an example (in the case of 3 levels) of a membership function based on the temperature of the thermal head.

FIG. 9 is a diagram showing an example (in the case of two levels) of a membership function based on a print part ambient temperature.

FIG. 10: Example of membership function based on pulse width (5
It is a figure which shows (in the case of a level).

FIG. 11 is a diagram showing an example (in the case of two levels) of a membership function based on the internal humidity of the apparatus.

FIG. 12 is a diagram showing an example (in the case of two levels) of a membership function based on the smoothness of the surface of the thermal paper.

FIG. 13 is an example of a membership function based on print density (2
It is a figure which shows (in the case of a level).

[Explanation of symbols]

 1 head temperature detection unit 2 printing unit ambient temperature detection unit 3 device internal humidity detection unit 4 paper smoothness detection unit 5 printing density detection unit 6 input selector 7 fuzzy inference unit 8 head drive control unit 9 thermal head 10 CPU 11 ROM 12 RAM 13 System bus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tanaka Regular 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (5)

[Claims] 1. A thermal printer apparatus which develops by closely contacting a thermal head with a processed paper which is heated to develop a color,
A thermal head temperature measuring means for measuring the temperature of the thermal head, a print part peripheral temperature measuring means for measuring a temperature around a print part inside the apparatus, the thermal head temperature measured by the thermal head temperature measuring means, and A thermal printer device comprising: a thermal head control means for controlling the pulse width of the thermal head based on fuzzy inference by inputting temperature information with the ambient temperature of the printing portion measured by the ambient temperature measuring means of the printing portion. . 2. A thermal printer device which develops by bringing a thermal head into close contact with a processed paper which is heated to develop color,
Thermal head temperature measuring means for measuring the temperature of the thermal head, apparatus internal humidity measuring means for measuring the humidity inside the apparatus, thermal head temperature measured by the thermal head temperature measuring means, and apparatus internal humidity measuring means And a thermal head control means for controlling the pulse width of the thermal head based on fuzzy inference with the information about the internal humidity of the apparatus measured in 1. as a thermal printer device. 3. A thermal printer device for developing by bringing a thermal head into close contact with a processed paper which is heated to develop a color,
A thermal head temperature measuring means for measuring the temperature of the thermal head, a processed paper surface measuring means for measuring the smoothness of the surface of the processed paper equipped in the device, and the thermal measured by the thermal head temperature measuring means. Thermal head control means for controlling the pulse width of the thermal head based on fuzzy inference by inputting information on the head temperature and the smoothness of the processed paper surface measured by the processed paper surface measuring means. Thermal printer device. 4. A thermal printer device in which a thermal head is brought into close contact with a processed paper which is heated to develop a color, and which is developed.
A thermal head temperature measuring means for measuring the temperature of the thermal head; a processed paper print density measuring means for measuring the density printed on the processed paper by the apparatus; a thermal head temperature measured by the thermal head temperature measuring means; A thermal printer device comprising: a thermal head control means for controlling the pulse width of the thermal head on the basis of fuzzy inference by inputting information on the processed paper print density measured by the processed paper print density measuring means. 5. The thermal head control means controls the pulse width of the thermal head by inferring a combination of arbitrary information out of the information input to the fuzzy inference section. 4. The thermal printer device according to 4.