JPH11188863A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the printing inferiority caused by erroneous input even if there is erroneous set input with respect to the kind of a printing medium in a printer and to perform the printing based on the certain discrimination related to the kind of the printing medium. SOLUTION: When a printing medium is fed (S43), a detection sensor is driven and the kind of the printing medium is discriminated on the basis of the sensor output by the reflected or permeated light of the printing medium and the discriminated kind is compared with the kind data of the printing medium set in a memory by a host computer (S45). In the case of non- coincidence in this comparison, it is judged that a printing medium different from the printing medium set on the side of the host computer is fed and printing operation is interrupted (S48) and this state is reported to a use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a printing apparatus, and more particularly to discrimination of a type of a printing medium used in the printing apparatus.

[0002]

2. Description of the Related Art Conventionally, a printing apparatus having a plurality of printing paper stacking units includes a size detecting mechanism for each stacking unit in order to detect the size of printing paper stacked on each stacking unit. Is common. As a further improvement of such a configuration, for example, Japanese Patent Application Laid-Open No. Sho 62-6584
In Japanese Patent Laid-Open No. 6-264, without providing a size detection mechanism for each loading section, the size of the printing paper to be loaded for each printing paper loading section is input via a predetermined operation section of the printing apparatus, and the content is nonvolatile. There has been proposed a configuration in which the data is stored in a volatile memory and read out as needed.

[0003]

In recent years, in particular, there has been a tendency for a wide variety of print media, particularly in ink jet printers, and the print quality often depends on the print media. For this reason, there has been proposed a type in which the type of print medium is determined so as to perform optimal print control according to the print medium, and print control is performed in accordance with the result of the determination (for example, Japanese Patent Application Laid-Open No. 6-15861).

However, in any of the conventional examples, since the determination of the printing paper is related only to the size of the paper loaded on the loading section, the type of the printing medium, for example, the printing paper for an overhead projector (hereinafter, referred to as the printing paper). OHP paper), coated paper, glossy paper, back print film,
The type of cloth or the like cannot be determined by reading information from the memory.

Further, in the conventional example as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 62-84646, when an incorrect input is made in the paper size instruction via the operation unit, or when the paper size already instructed in the stacking unit is used. If paper of a size different from the above is erroneously loaded, a printing paper different from a desired printing paper is fed, and printing may be performed in that state.

Further, in the example of the above-mentioned Japanese Patent Application Laid-Open No. 62-64646, the paper size is instructed by operation via the operation unit. Or, the setting is performed by a so-called printer driver mounted on the host computer, and many printers do not have an operation unit or have only a simple operation unit. In such a printer, relatively complicated operations regarding printing paper are performed. There was a problem that it was not possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. It is an object of the present invention to provide a method for setting an erroneous input even if there is an erroneous input regarding the type and size of a print medium. It is an object of the present invention to provide a printing apparatus capable of preventing printing defects beforehand and performing printing based on reliable determination of the type and size of a printing medium.

[0008]

According to the present invention, there is provided:
What is claimed is: 1. A printing apparatus for printing on a print medium using a print head, comprising: setting means for setting the type and / or size of the print medium used in the printing apparatus; and the type and / or type of the print medium set by the setting means. Memory means for storing a size; detecting means for detecting the type and / or size of a printing medium used when printing is performed in the printing apparatus; and type and / or size of the printing medium detected by the detecting means. Control means for comparing the type and / or size of the print medium stored in the memory means, and interrupting the printing operation when the comparison is inconsistent.

According to the above arrangement, the type and / or size of the print medium is detected, and the detection result is compared with the type and / or size of the print medium which is set in advance and stored in the memory. If they do not match, the printing operation is interrupted assuming that the type and / or size of the printing medium to be used for printing is different from the one set in advance on the host computer. Settings or incorrect printing due to incorrect printing paper loading operation can be prevented.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a main structure of an ink jet printer according to an embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes an ink-jet print head, which is integrally equipped with four heads of black (K), cyan (C), magenta (M), and yellow (Y). , 102K, 102C, 102M
And 102Y are ink tanks storing black, cyan, magenta and yellow inks, respectively. 103 is a carriage on which the print head 101 and the ink tank are mounted, and 104 and 105 are carriages 10.
A guide shaft 106 for guiding the movement of the carriage 3;
3, a belt for transmitting a driving force for moving the belt 3;
Is a carriage motor for driving the carriage belt 106.

A flexible printed card (FPC) 108 includes a control board 111 and a print head 101.
Are electrically connected. Reference numeral 109 denotes a paper feed roller, and reference numeral 110 denotes a print sheet as a print medium. The control board 111 includes a drive circuit that controls printer functions such as the print head 101 and the carriage motor 107 and drives and controls a mechanism drive unit such as the print head 101 and the carriage motor.

Reference numerals 112A and 112B denote sensors which are arranged so as to face both sides of the conveyed print medium and detect the type of the print medium. Further, 113,1
Reference numerals 14 and 115 denote tray-shaped print medium loading units, respectively, from which the print paper 110 is fed.

FIG. 2 is a block diagram mainly showing a control configuration in the printer.

Referring to FIG. 1, reference numeral 201 denotes an MPU (Micro Processing Unit), which controls the entire printer in accordance with programmed firmware. 202A and 202B are driving circuits for sensors 112A and 112B for detecting the type of print medium, and 203 and 204 are driving circuits 202A in MPU 201.
And a terminal for inputting the output signal of B and 202B and performing A / D conversion (analog-digital conversion).

A printer control circuit 205 controls a mechanism driving unit 206 such as the print head 101 and the carriage motor 107. As described above, the printer control circuit 206 includes a paper feed motor and a paper stacking unit (not shown) in addition to the carriage motor 107. A mechanism driving unit such as a solenoid for selecting which of 113, 114 and 115 to feed paper.

Reference numeral 207 denotes an EEPROM (Electrically Erasable Programmable Read Only Memory) for storing the size and type of printing media loaded on the paper loading units 113, 114 and 115, the number of printed sheets, and the like.

Reference numeral 208 denotes a host computer 209.
209 is a host computer for generating print data and operating a printer driver, 210 is a physical interface, and is generally a Centro interface. , IEEE128
4, RS232C, RS422, SCSI, etc. can be used.

In the above-described configuration, the size and type of the printing medium loaded on the paper loading units 113, 114 and 115 are instructed from the printer driver operating on the host computer 209 via the interface 210 and the interface unit 208, and the EEPROM 207 is designated. Can be stored.

FIG. 3 shows the sensor 112A or 11 described above.
2B and their respective drive circuits 202A and 2B.
FIG. 2B is a circuit diagram showing a detailed configuration of the second embodiment. Since these sensors have the same configuration, only the sensor 112A and its driving circuit 202A will be described here.

In FIG. 3, reference numeral 301A denotes a light emitting diode, 302A denotes a light receiving photodiode, 303A denotes a current limiting resistor for the light emitting diode A, 304A denotes a transistor for switching on and off of the light emitting diode 301A, and 305A denotes an MPU 201. 306A is an amplifier for amplifying the photocurrent generated by the photodiode 302;
07A is a feedback resistor that determines the amplification factor of the amplifier, and 308A is an output line of the drive circuit 202A, which is connected to the A / D converter input terminal 203 provided in the MPU 201.

The printing operation of the present embodiment based on the configuration shown in FIGS. 1, 2 and 3 will be described with reference to the flowchart shown in FIG.

When the print data sent from the host computer 209 is received by the printer control board 111 (step S41), the print data is expanded to perform predetermined processing for generating ink ejection data (step S41).
42), a paper feed motor (not shown) is started, and the already selected paper stacking units, that is, stacking units 113 and 114, are started.
Alternatively, the printing paper 110 is fed from either of the printers 115 (step S43).

In this paper feeding process, the printing paper 110 passes through the two printing medium detection sensors 112A and 112B.
At this time, the print medium detection sensors 112A and 112B
The light emitting diodes 301A and 301B are alternately turned on or off, and the amounts of light received by the photodiodes 302A and 302B at this time are detected (step S44).

Specifically, the light emitting diode 301B is turned off, the light emitting diode 301A emits light, and the reflected light amount is detected by the photodiode 302A and the transmitted light amount is detected by the photodiode 302B. Next, the light emitting diode 301A is turned off, the light emitting diode 301B emits light, and the amount of reflected light is detected by the photodiode 302B.
Detects the amount of transmitted light.

Based on the detection result, the type of the print medium 110 is determined as described later, and the determined type and the EEPR
The type of the supplied print medium stored in the OM 207 is compared (step S45), and if they do not match, the printing operation is interrupted (step S48) and the interface unit 208
Is notified to the user via display or by voice (step S49). On the other hand, if the comparisons match, the printing operation is performed in a mode suitable for the printing medium (step S4).
6).

The detection of the print medium will be described below.

FIGS. 5A to 5C and FIGS.
FIG. 3C is a diagram for explaining detection of plain paper according to the present embodiment.

5A and FIG. 6A.
Is a plain paper to be detected, and as shown in the drawing, both the front surface and the back surface are relatively rough due to the fiber component.

In FIG. 5A, reference numeral 401 denotes the light emitting diode 3.
01A emitted light. On the other hand, reference numeral 402 denotes reflected light from the surface due to the light emission, which is detected by the photodiode 302A. As shown in FIG. 5B, most of the emitted light 401 is reflected and the surface roughness , And a periodic change in the detection signal according to.

Reference numeral 403 denotes transmitted light from the front surface to the back surface, which is detected by the photodiode 302B. As shown in FIG. 5C, a very small portion of the emitted light 401 is transmitted. Thus, a periodic variation having the same tendency as that of the reflected light 402 is confirmed.

Similarly, in FIG. 6A, reference numeral 404 denotes light emitted from the light emitting diode 301B. On the other hand, reference numeral 405 denotes light reflected from the back surface by the light emission,
6B, most of the emitted light 404 is reflected as shown in FIG. 6B, and the difference in the detection signal and the periodic fluctuation according to the surface roughness are confirmed. Is done.

Reference numeral 406 denotes transmitted light from the back surface to the front surface, which is detected by the photodiode 302A. As shown in FIG. 6C, a very small portion of the emitted light 404 is transmitted. As a result, the same periodic fluctuation as the reflected light 405 is confirmed.

FIGS. 7A to 7C and FIGS.
FIG. 3C is a diagram for explaining detection of an OHP sheet according to the present embodiment.

In these figures, reference numeral 110 denotes an O to be detected.
As shown in the figure, the front and back surfaces are relatively flat and have high transparency in use.

In FIG. 7A, reference numeral 501 denotes a light emitting diode 3;
01A emitted light. On the other hand, reference numeral 502 denotes light reflected from the surface, which is detected by the photodiode 302A. In this case, as shown in FIG. 7B, only a very small part of the emitted light 401 is reflected and the surface is flat, so that the detection level fluctuates little and the output is small.

On the other hand, reference numeral 503 denotes transmitted light from the front surface to the back surface, which is detected by the photodiode 302B. Most of the transmitted light 501 is transmitted through the transmitted light 501.
As shown in FIG. 7C, the level fluctuation is small but the output is large.

Similarly, in FIG. 8A, reference numeral 504 denotes light emitted from the light emitting diode 301B. Reference numeral 505 denotes reflected light from the back surface, which is detected by the photodiode 302B. As shown in FIG. 8B, a very small part of the emitted light 504 is reflected and the surface is flat.

On the other hand, reference numeral 506 denotes transmitted light from the back surface to the front surface, which is detected by the photodiode 302A, but most of the emitted light 504 is transmitted.
As shown in (c), the output is detected to be large although the fluctuation is small.

FIGS. 9A to 9C and FIGS.
FIG. 3C is a diagram for explaining coated paper detection according to the present embodiment.

In the drawing, reference numeral 110 denotes a coated paper to be detected, which is obtained by applying silica or the like to the surface of the plain paper shown in FIGS. 5 and 6 to improve the adhesion of ink. For this reason, as shown in the figure, the front surface of the coated paper is flattened by the coating layer 601, and the back surface is a relatively rough surface made of fiber components like the plain paper.

In FIG. 9A, reference numeral 602 denotes the light emitting diode 3.
01A emitted light. Reference numeral 603 denotes reflected light from the surface, which is detected by the photodiode 302A. In this case, as shown in FIG.
It is confirmed that most of the light is reflected, and that the surface is flat, so that the fluctuation of the detection level is small.

On the other hand, reference numeral 604 denotes transmitted light from the front surface to the back surface, which is detected by the photodiode 302B. However, a very small portion of the emitted light 602 is transmitted, and FIG.
As shown in (c), a slight periodic change due to unevenness in the thickness of the paper is confirmed.

Similarly, in FIG. 10A, reference numeral 605 denotes light emitted from the light emitting diode 203, and reference numeral 606 denotes light reflected from the back surface of the light. This reflected light is detected by the photodiode 302B, and as shown in FIG. 10B, most of the emitted light 605 is reflected. Further, similarly to the example shown in FIG. Large and small differences and periodic fluctuations are confirmed.

On the other hand, reference numeral 607 denotes transmitted light from the back surface to the front surface, which is detected by the photodiode 302A. As shown in FIG. 10C, a very small part of the emitted light 605 is transmitted. As a result, a periodic variation having the same tendency as that of the transmitted light 604 from the surface is confirmed.

As described above, as shown in FIGS. 5 and 6, FIGS. 7 and 8, and FIGS. 9 and 10, the output levels of the reflected light and the transmitted light detected according to the type of the printing medium and the fluctuations thereof. The type of print medium can be detected based on the difference in the period.

The result of this determination is compared with the contents stored in the EEPROM as described with reference to FIG. 4, and if they match, printing is performed in a mode corresponding to the type of the detected print medium.

For example, as described in JP-A-6-40038, changing the number of scans for one image area, changing a mask pattern for masking a print area divided for each scan, Changing the size of the print area to be divided, appropriately performing one-way printing (printing operation only when the carriage 103 moves in one direction) or two-way printing (printing operation when the carriage 103 reciprocates). By adopting the selection as appropriate, the printing paper 1
By setting a print mode according to the ink absorption speed of No. 10, ink bleeding and the like can be prevented, and a high-quality image can be printed.

FIG. 11 shows an ink jet printer according to a second embodiment of the present invention. Here, one of the detection sensors 112A and 112B disposed on both sides of the print medium 110 in the first embodiment is shown. The printing paper is fixed to the printer main body along the conveyance path, and the other is mounted on the carriage 103. In this embodiment, a print medium 701 having a width smaller than the moving range of the carriage is used.

The operation of this embodiment will be described below.

As in the first embodiment, when print data sent from a host computer (not shown) is received by the printer control board 111, the print data is developed and the paper feed motor is started at the same time, and the already selected paper stack is loaded. The recording medium 701 is fed from one of the units. At this time, the carriage 103 has two print medium detection sensors 11.
The recording medium 701 is conveyed to a position where its leading end is sandwiched between the two detection sensors 112A and 112B during the paper feeding process. Then, the print medium detection sensors 112A and 112B
Is driven to determine the type of print medium in the same procedure as in the first embodiment.

Thereafter, the printing operation is started and the carriage 1
03 reciprocates left and right. At this time, the detection sensor 1
Regarding 12A and 112B, the light-emitting diode 301A is turned on, the light-emitting diode 301B is turned off, the reflected light from the recording medium 701 is detected by the photodiode 302A, and the width of detecting the reflected light can be recognized as the width of the print medium 701. .

If the detected type and width of the print medium are the same as the type and size of the print medium stored in the EEPROM 207, the printing is continued. To notify the user via the.

FIG. 12 is a block diagram showing a printing system according to the third embodiment of the present invention.

In the figure, reference numerals 801 and 802 denote host computers for generating print data and operating a printer driver, respectively. Reference numeral 803 denotes a physical interface typified by a so-called LAN (local area network) that can connect a plurality of computers, and generally includes Ethernet, AppleTalk, and the like.

A printer driver operating on the host computer 801 or 802 sends an interface 803
And the paper stacking unit 11 via the interface unit 208
The sizes and types of the print media loaded on the printers 3, 114 and 115 are designated and stored in the EEPROM 207. Conversely, the contents of the EEPROM 207 can be read out to the printer driver operating on the host computer 801 or 802 via the interface 803 and the interface unit 208, and the size and type of the print medium designated by the host computer 801 Can be confirmed by the host computer 802.
Thus, the printing process described in the first or second embodiment can be performed for a plurality of host computers.

Although the above embodiments have been described with reference to an ink jet printer, the application of the present invention is not limited to this. For example, printers using other printing methods, such as a thermal transfer method, a heat-sensitive method, and an electrophotographic method, may be used. It can also be applied to

The present invention is not limited to a printer, but can be applied to a printing device such as a copying machine.

Further, in the present invention, the case where the number of print medium detection sensors is two has been described. However, the present invention is not limited to this case. Is also possible. Details of this method are described in, for example, 283018, Watani Proposal.

(Others) It should be noted that the present invention includes a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for performing ink ejection, particularly in an ink jet recording system. An excellent effect is obtained in a recording head and a recording apparatus of a type in which the state of ink is changed by the thermal energy. This is because according to such a method, it is possible to achieve higher density and higher definition of recording.

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method is a so-called on-demand type,
Although it can be applied to any type of continuous type, in particular, in the case of the on-demand type, it can be applied to a sheet holding liquid (ink) or an electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal transducer, and film boiling occurs on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal on a one-to-one basis.
This is effective because air bubbles inside can be formed. The liquid (ink) is ejected through the ejection opening by the growth and contraction of the bubble to form at least one droplet. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of a liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable. As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

As the configuration of the recording head, in addition to the combination of the discharge port, the liquid path, and the electrothermal converter (linear liquid flow path or right-angle liquid flow path) as disclosed in the above-mentioned respective specifications, U.S. Pat. No. 4,558,333 and U.S. Pat.
A configuration using the specification of Japanese Patent No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Application Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of an electrothermal converter for a plurality of electrothermal converters, and an aperture for absorbing a pressure wave of thermal energy is provided. The effect of the present invention is effective even if the configuration is based on JP-A-59-138461, which discloses a configuration corresponding to a discharge unit. That is, according to the present invention, recording can be reliably and efficiently performed regardless of the form of the recording head.

Further, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium on which a recording apparatus can record. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads, or a configuration as one integrally formed recording head.

In addition, even in the case of the serial type as described above, the recording head fixed to the apparatus main body or the electric connection with the apparatus main body and the ink from the apparatus main body are attached by being mounted on the apparatus main body. The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is provided integrally with the recording head itself is used.

Further, it is preferable to add a recording head ejection recovery unit, a preliminary auxiliary unit, and the like as the configuration of the recording apparatus of the present invention since the effect of the present invention can be further stabilized. If these are specifically mentioned, the recording head is heated using capping means, cleaning means, pressurizing or suction means, an electrothermal transducer, another heating element or a combination thereof. Pre-heating means for performing the pre-heating and pre-discharging means for performing the discharging other than the recording can be used.

The type and number of recording heads to be mounted are, for example, not only those provided for one color ink but also a plurality of inks having different recording colors and densities. A plurality may be provided. That is, for example, the printing mode of the printing apparatus is not limited to a printing mode of only a mainstream color such as black, but may be any of integrally forming a printing head or a combination of a plurality of printing heads. The present invention is also very effective for an apparatus provided with at least one of the recording modes of full color by color mixture.

In addition, in the embodiments of the present invention described above, the ink is described as a liquid. However, an ink which solidifies at room temperature or lower and which softens or liquefies at room temperature may be used. In general, the ink jet method generally controls the temperature of the ink itself within a range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in a stable ejection range. Sometimes, the ink may be in a liquid state. In addition, in order to positively prevent temperature rise due to thermal energy by using it as energy for changing the state of the ink from a solid state to a liquid state, or to prevent evaporation of the ink, the ink is solidified in a standing state and heated. May be used. In any case, the application of heat energy causes the ink to be liquefied by the application of the heat energy according to the recording signal and the liquid ink to be ejected, or to start solidifying when it reaches the recording medium. The present invention is also applicable to a case where an ink having a property of liquefying for the first time is used. In such a case, the ink
JP-A-54-56847 or JP-A-60-7
As described in Japanese Patent Publication No. 1260, it is also possible to adopt a form in which the sheet is opposed to the electrothermal converter in a state where it is held as a liquid or solid substance in the concave portion or through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, the form of the ink jet recording apparatus of the present invention may be used not only as an image output terminal of an information processing apparatus such as a computer, but also as a copying apparatus combined with a reader or the like, or a facsimile apparatus having a transmission / reception function. It may take a form.

[0070]

As described above, according to the present invention, the type and / or size of the print medium is detected, and the detection result is compared with the type and / or size of the print medium preset and stored in the memory. Are compared, and if the comparisons do not match, the printing operation is interrupted because the type and / or size of the printing medium to be used for printing is different from the one set in advance on the host computer, for example. In addition, it is possible to prevent a printing error due to an incorrect setting in the host computer or the like or a mounting operation of an incorrect printing paper.

As a result, it is possible to always perform good printing while avoiding a printing error caused by a setting error and a mounting operation error regarding the printing medium.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a main part of an inkjet printer according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a control configuration of the printer shown in FIG.

FIG. 3 is a circuit diagram showing a sensor for determining the type of the print medium shown in FIG. 1 and a driving circuit thereof.

FIG. 4 is a flowchart illustrating a procedure of a print medium type determination process according to an embodiment of the present invention.

FIGS. 5A to 5C are diagrams illustrating plain paper detection by the sensor.

FIGS. 6A to 6C are diagrams illustrating plain paper detection by the sensor.

FIGS. 7A to 7C are diagrams illustrating OHP sheet detection by the sensor.

FIGS. 8A to 8C are diagrams illustrating OHP sheet detection by the sensor.

FIGS. 9A to 9C are diagrams illustrating coated paper detection by the sensor.

FIGS. 10A to 10C are diagrams illustrating coated paper detection by the sensor.

FIG. 11 is a perspective view showing a main part of an ink jet printer according to another embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a print system according to still another embodiment of the present invention.

[Explanation of symbols]

101 print head 102K, 102C, 102M, 102Y ink tank 103 carriage 110 print paper (print medium) 111 control board 112A, 112B sensor 113, 114, 115 loading unit 201 MPU 202A, 202B drive circuit 209, 801 802 host computer 301A , 301B Light emitting diode 302A, 302B Photodiode

Claims (8)

[Claims] 1. A printing apparatus for printing on a print medium using a print head, comprising: setting means for setting a type and / or size of a print medium used in the printing apparatus; and a print medium set by the setting means. Memory means for storing the type and / or size of the print medium; detecting means for detecting the type and / or size of the print medium used when printing is performed in the printing apparatus; And / or a control unit for comparing the size and / or the type and / or size of the printing medium stored in the memory unit, and interrupting the printing operation when the comparison is inconsistent. 2. The method according to claim 1, wherein the setting unit is configured to store the information in the memory unit based on information on a type and / or size of a print medium sent from a host device. 3. The printing device according to claim 1. 3. The photodetector includes a photosensor having a pair of light-emitting elements and a light-receiving element arranged opposite to each other on both sides of a print medium conveyed for printing. The printing apparatus according to claim 1, wherein the type and / or size of the printing medium is detected based on a signal output after receiving the reflected light and the transmitted light from the transported printing medium. 4. The method according to claim 1, wherein the setting unit includes the first unit in the unit.
4. The print medium according to claim 3, wherein one of the pair of photo sensors is provided on a carriage for scanning the print head, and the size of the print medium is detected by the provided photo sensor by movement of the carriage. Printing device. 5. The printing device according to claim 2, wherein the printing device receives information on the type and / or size of the printing medium from a plurality of host devices, and performs setting by the setting unit. The printing device according to any one of the above. 6. The printing apparatus according to claim 1, wherein the control unit further notifies when the comparisons do not match. 7. The printing head according to claim 1, wherein the printing head performs printing by discharging ink.
The printing device according to any one of the above. 8. The printing apparatus according to claim 7, wherein the print head uses heat energy to generate bubbles in the ink, and discharges the ink by the pressure of the bubbles.