JP2004314537A - Ink end detecting method for ink jet printer, ink jet printer, and information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose an ink end detecting method which reduces variations of an ink consumption amount caused by the individual differences of ink jet printers. <P>SOLUTION: The ink consumption amount discharged from a nozzle of an ink jet head is counted as an ink near end counter during the period from a full state of the ink in an ink cartridge until it discriminates that it is in an ink near end state. An ink residual amount from the ink near end to an ink shortage is set as an initial value of the ink end counter on the basis of the correspondence relation between a physical ink amount from the full state of the ink until it is discriminated that it is in the ink near end state and the ink near end counter at the time when it is discriminated that it is in the ink near end state. The ink residual amount is counted on the basis of the set initial value of the ink end counter after the ink near end state. The ink end is detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ink end detection method for an ink jet printer, an ink jet printer, and an information recording medium. In particular, an ink end detection method of an ink jet printer that sets an initial value of an ink end counter when the ink near end detection mechanism determines that the ink is near end, and counts the ink end counter to detect the ink end when ink is consumed thereafter. , An ink jet printer and an information recording medium.
[0002]
[Prior art]
2. Related Art An ink jet printer using an ink cartridge as an ink supply source has been widely known. In general, an ink jet printer of this type counts the amount of ink consumed based on the amount of ink ejected from the nozzles of the ink jet head, and detects ink exhaustion based on the count result. However, the ink end detection method for detecting the ink shortage in this manner has the following problems.
[0003]
Since the consumption of ink discharged from the nozzles of the inkjet head varies depending on the individual differences of the inkjet printer, the amount of ink consumed to be counted varies greatly as compared with the actual amount of ink consumed. Therefore, it is necessary to provide a large margin to determine the ink end. As a result, when the ink end is detected, the ink may remain, and the ink is often wasted. Conventionally, in order to solve such a problem, an ink jet printer having an ink near-end sensor for detecting an ink near-end in an ink cartridge has been invented (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2002-326369
[Problems to be solved by the invention]
The detection of the remaining amount of ink by the ink near-end sensor can detect an effective remaining amount of ink that is not affected by individual differences of the inkjet printer because the sensor detects the amount of ink up to a certain amount or less. However, the desirable points remain.
[0006]
In other words, the ink near-end sensor detects that the amount of ink has become equal to or less than a predetermined amount. Until the ink runs out, the ink near-end sensor detects the amount of ink consumed based on the amount of ink consumed from the nozzles of the inkjet head. Is counted, and based on the count result, the ink out is detected. In the method of counting the amount of ink, as described in the related art, since the ejection amount of the ink of the inkjet head varies depending on the individual difference of the inkjet printer, it is necessary to provide a large margin. At the time when the end is detected, there is a problem that ink may remain.
[0007]
The present invention has been made in order to solve this problem, and proposes a method for reducing variation in ink consumption due to individual differences of inkjet printers, and has an object to accurately detect an ink end. I do.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an ink near-end determining step of determining whether the remaining amount of ink in an ink cartridge is at an ink near-end by detecting a physical ink amount,
An ink near-end counter counting step of counting the consumption of ink ejected from the nozzles of the inkjet head with an ink near-end counter from the time when the ink in the ink cartridge is full to the time when the ink near end determination step determines that the ink is near end; When,
An ink end counter initial value setting step of setting the amount of ink remaining in the ink cartridge as an ink end counter initial value at the time when the ink near end determination step determines that the ink is near end;
An ink end counter for setting the initial value of the ink end counter to an ink end counter after the ink near end determination step determines that the ink is near end, and counting the consumption of ink ejected from the nozzles of the inkjet head by the ink end counter. A counting step;
An ink end determination step of determining whether or not the ink end counter calculated from the ink end counter counting step has reached the ink end counter initial value;
It is characterized by having.
[0009]
Further, the ink end counter initial value setting step includes a near end ink amount representing a physical ink amount from a state where the ink is full to an ink near end determination, and a physical ink remaining in the ink cartridge at the time of the ink near end determination. Based on the end ink amount indicating the amount and the ink near end counter,
Temporary calculation of the ink end counter initial value from the temporary ink end counter initial value = ink near end counter × end ink amount / near end ink amount;
It is characterized by:
[0010]
When the temporary ink end counter initial value is smaller than the minimum ink end counter initial value counted when the ink is consumed most in consideration of the variation of the individual inkjet printers, the ink end counter initial value is set to the minimum ink end counter value. Correct to the end counter initial value,
It is characterized by having a first correction.
[0011]
When the temporary ink end counter initial value is larger than the maximum ink end counter initial value counted when the ink is not consumed most in consideration of the variation of the individual inkjet printers, the ink end counter initial value is set to the minimum ink end counter value. Correct to the end counter initial value,
It is characterized by having a second correction.
[0012]
The first correction and the second correction indicate that a range that cannot be considered as a variation due to the ink consumption of the individual inkjet printer is corrected by the initial value of the minimum ink end counter. Therefore, even if the cartridge is replaced before the ink near end and the ink near end counter and the ink amount in the ink cartridge cannot be corresponded, the initial value of the ink end counter can be corrected. It has the effect of being able to deal with it.
[0013]
Next, the present invention sets the ink end counter initial value to the temporary ink end counter initial value when the temporary ink end counter initial value is equal to or more than the minimum ink end counter initial value and equal to or less than the maximum ink end counter initial value. ,
It is characterized by:
[0014]
The ink end counter initial value is calculated from the end ink amount based on the correspondence between the ink near end ink amount and the ink near end counter, so that the ink end counter initial value can be set according to the individual inkjet printer. For this reason, there is an effect that the influence due to the variation of the individual inkjet printers can be suppressed, and the ink end can be detected accurately.
[0015]
Next, the present invention is characterized in that the ink near end counter and the ink end counter are stored and held in a non-volatile memory when the power of the ink jet printer is turned off.
[0016]
Further, the invention is characterized in that the ink near end counter and the ink end counter are read from a nonvolatile memory when power is turned on.
[0017]
Further, holding and reading from the nonvolatile memory and reading from the nonvolatile memory have an effect that the ink near end counter and the ink end counter can be held even when the power is turned off. There is an effect that can be maintained.
[0018]
An ink end detection method for an ink jet printer of the present invention, and recording a program for realizing the ink jet printer on an information recording medium such as a compact disk, a flexible disk, a hard disk, a magneto-optical disk, a digital video disk, a magnetic tape, and a semiconductor memory. Can be.
[0019]
By executing a program recorded on the information recording medium of the present invention by a control device such as a CPU (Central Processing Unit) provided in the ink jet printer, the ink end detecting method of the above ink jet printer and the ink jet printer A printer can be realized.
[0020]
Further, the information recording medium on which the program of the present invention is recorded can be distributed and sold independently of the ink jet printer.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described. It should be noted that the embodiments described below are for explanation, and do not limit the scope of the present invention. Therefore, those skilled in the art can adopt embodiments in which each of these elements or all elements are replaced with equivalents, but these embodiments are also included in the scope of the present invention.
[0022]
First, the configuration of the ink jet printer according to the present invention will be described. FIG. 1 is a block diagram showing an example of an embodiment of an ink jet printer according to the present invention.
[0023]
The interface 102 provided in the inkjet printer 101 receives a print command transmitted from the host PC 120.
[0024]
The CPU 103 interprets the print command received by the interface 102, drives the inkjet head 106, and prints characters and graphics on a print target such as paper.
[0025]
The processing executed by the CPU 103 is represented by a program stored in a ROM 104 (Read Only Memory). When the power of the inkjet printer is turned on, the CPU 103 reads a program stored in the ROM 104 into the RAM 105 (Random Access Memory), and executes the read program from the top.
[0026]
Further, the CPU 103 develops an image of a character or a figure to be printed on the RAM 105, and drives the inkjet head 106 according to the image. When developing an image from the character code of the character specified in the print command, font information stored in the ROM 104 is used.
[0027]
Further, a cleaning mechanism 108 for cleaning the inkjet head 106 is provided. The ink jet head 106 supplies ink from the ink cartridge 107 via an ink supply port, discharges the supplied ink, and performs printing.
[0028]
As a cleaning method,
(1) Capping the nozzle surface of the inkjet head 106, sucking out ink by a pump through a tube connected to the cap, and storing the ink in a waste ink cartridge, thereby increasing the viscosity of the ink or bubbles accumulated in the nozzle. Is removed.
[0029]
(2) Flushing from the nozzles to eject ink irrelevant to printing to remove thickened ink.
[0030]
(3) Wiping the nozzle surface to remove ink leakage and dust near the nozzle.
Etc.
[0031]
The cleaning mechanism 108 includes a cap on the nozzle surface, a tube connected to the cap, a pump connected to the tube, a wiper for wiping the nozzle, and a motor for moving the wiper.
[0032]
The ink near-end detection mechanism 109 detects the remaining amount of ink in the ink cartridge 107 with the ink near-end sensor 110. When the remaining amount of ink in the ink cartridge 107 becomes small, the reflection surface of the ink cartridge 107, which has not functioned in reflection in contact with the ink, reflects the light from the ink near-end sensor 110, and can detect the ink near-end. .
[0033]
The display panel 111 displays the current status of the inkjet printer 101 and functions as a notification unit. For example, whether or not there is no paper, whether or not online, and the like are displayed. In addition, an ink near end and an ink end are displayed.
[0034]
The nonvolatile memory 112 configured by a flash memory, an EEPROM, or the like holds the values of the ink near end counter and the ink end counter so that the values are stored even when the power of the printer is turned off.
[0035]
Next, FIG. 2 is a flowchart showing the ink end detection method of the present invention. When control for consuming ink is performed by printing or cleaning S201, it is determined whether or not the ink is near end (S202), and an ink near end counter counting step S203, an ink end counter initial value setting step S205, an ink end counter counting step are performed. After S206, S207, etc., the ink end is detected.
[0036]
In the determination S202 of whether or not the ink is near end, the result detected by the ink near end sensor 110 of the ink near end detection mechanism 109 is held, and it is determined whether or not the ink is near end.
[0037]
Here, when printing or cleaning is performed when the current time is not the ink near end, the ink near end counter is incremented based on the ink consumption in the ink near end counter counting step S202. Hereinafter, a method of adding the ink consumption in the case of printing and cleaning will be described.
[0038]
(A) In the case of printing, the CPU 103 drives the inkjet head 106 in accordance with the image developed on the RAM 105, and prints characters and figures on a print target. In a case where ink is ejected onto the dots to be printed, the corresponding print element of the inkjet head 106 is driven. Next, the CPU 103 calculates a value obtained by multiplying the number of dots to be ejected by the number of ejection drives per dot as the ink consumption used for printing. Using this result, an ink near end counter is added. For example, if the amount of ink consumed in one ejection is 1 ng (nanogram: 10 to the -9th power), then a total of 1 g of ink is ejected in 10 to the 9th power of the ejection operation.
[0039]
(B) In the case of cleaning, the CPU 103 first checks a cleaning method to be applied, and calculates an ink amount (cleaning ink amount) necessary for cleaning. For example, when the switch 113 is pressed and manual cleaning is performed, an instruction is given so that 5 mg of ink is sucked from the nozzle. When five hours have passed since the previous cleaning, it is instructed that 3 mg of ink is ejected from the nozzle. Further, after printing 10 lines, an instruction is issued to perform flushing discharge of one dot from all nozzles, and the amount of ink consumed differs depending on the type of cleaning. As described above, the CPU 103 instructs the ink consumption according to the designated type of cleaning, and adds the consumption to the ink near-end counter.
[0040]
Next, the steps when the ink near end has occurred (S204 and thereafter) will be described.
[0041]
The setting of the initial value of the ink end counter does not need to be performed a plurality of times, and only needs to be performed once when the ink near end occurs. Therefore, the determination is performed in S204. For example, when the initial value of the ink end counter is set to 0, if the value is not 0, it can be determined that the ink near end has already been detected and the initial value of the ink end counter has been set.
[0042]
Next, the ink end counter initial value setting S205 process of FIG. 3 will be described. A temporary ink end counter initial value based on the physical ink amount ratio (near end ink amount: end ink amount) in the ink cartridge 107 and the ink consumption amount (ink near end counter) unique to the inkjet printer counted in the ink near end counter counting step S203. Is calculated as follows (S301).
[0043]
Temporary ink end counter initial value = ink near end counter × end ink amount / near end ink amount The calculated temporary ink end counter initial value is determined based on whether it is smaller than the maximum ink end counter initial value or larger than the minimum ink end counter initial value. Then, only when the result is true, the value of the temporary ink end counter initial value is applied as the ink end counter initial value (S303). If the determination in S302 is false, it is assumed that the counter is an incorrect ink near-end counter that does not correspond to the actual physical ink amount, and the value of the ink end counter initial value is corrected with the minimum ink end counter initial value (S304). An example in which the determination in S302 is false may include a case where the currently used ink cartridge 107 has been replaced with an ink near-end ink cartridge 107 at a stage before the ink near-end. In this case, it is assumed that the value of the ink near-end counter becomes small, and as a result, the initial value of the temporary ink end counter may be smaller than the minimum ink end counter initial value.
[0044]
As another example, when the ink cartridge 107 which is not the ink near end is replaced many times, it is assumed that the value of the ink near end counter becomes large, and as a result, the initial value of the temporary ink end counter becomes the maximum ink end counter initial value. Can be larger.
[0045]
Next, the near-end ink amount and the end ink amount are obtained based on the timing of detecting the ink near-end. For example, a case of an ink near-end detector using the optical sensor 401 of FIG. 4 will be described. As the optical sensor, a prism 403 having a pair of reflective surfaces forming a part of an ink interface of the ink cartridge 402, a light emitting element 404, and light emitted from the light emitting element and reflected by the pair of reflective surfaces And a light receiving element 405 capable of receiving the reflected light after the reflection. When the amount of ink in the ink cartridge decreases and the ink level falls below a predetermined liquid level 406, the light receiving amount of the light receiving element 405 of the optical sensor exceeds the predetermined light receiving amount. Is determined. For this reason, the ink amount from the ink cartridge full state to the liquid level position 406 can be defined as the near-end ink quantity 407, and the ink quantity from the liquid level position 406 until the ink runs out can be defined as the end ink quantity 408. .
[0046]
The end ink amount can be experimentally obtained by measuring the amount of ink remaining in the ink cartridge after the detection by the ink near-end sensor, and the value is written in advance in a flash memory or the like.
[0047]
Note that the ink end detection mechanism is not limited to an optical sensor. For example, instead of optically detecting the ink end, the ink near end of the ink cartridge can be detected based on a change in impedance between the pair of opposed electrodes.
[0048]
Further, the initial value of the minimum ink end counter and the initial value of the maximum ink end counter are obtained from the maximum ink consumption amount and the minimum ink consumption amount discharged from one nozzle of the inkjet head. For example, the maximum ink consumption is 1.2 ng (nanogram: 10 to the -9th power), the minimum ink consumption is 1 ng (nanogram: 10 to the -9th power), and the end ink amount is 2.4 g (experimentally determined in advance). ), Between the ink near end and the ink exhaustion, the number of ejections calculated by the maximum ink consumption is 2 × 10 9 and the number of ejections converted by the minimum ink consumption is 2.4 × 10 9. Thus, the first ejection number can be defined as a minimum ink end counter initial value, and the second ejection number can be defined as a maximum ink end counter initial value.
[0049]
Next, the ink end counter counting / detecting step (S206, S207, S208, S209) will be described.
[0050]
Each time a control that consumes ink, such as printing or cleaning, is executed, an ink end counter is counted to detect ink end. For example, when printing is executed, it is determined in S206 that the command is not a cleaning command, and the ink consumption for printing calculated by the same method as described in (A) is subtracted from the ink end counter (S208). In the case of cleaning, it is determined in S206 that the command is a cleaning command, and the amount of ink consumed for cleaning calculated by the same method as described in (B) above is subtracted from the ink end counter (S208).
[0051]
When it is finally determined that the ink end counter is 0 or less (S209), it is detected as an ink end at that time (S210), and the display panel 111 is notified of the ink end. At the same time, by using the interface 102 as notification means to the host PC 120, it is possible to display on the display of the host PC 120 that the ink cartridge 107 should be replaced.
[0052]
Note that the count of the ink end counter is not limited to subtraction. For example, the ink end counter can be added to detect the ink end based on whether or not the ink end counter has reached the initial value.
[0053]
【The invention's effect】
According to the ink end detection method of the present invention, the initial value of the ink end counter used for the ink end detection is calculated from the end ink amount based on the correspondence between the near end ink amount and the ink near end counter. Can be set to the initial value of the ink end counter. For this reason, there is an effect that the influence due to the variation of the individual inkjet printers can be suppressed, and the ink end can be detected accurately.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an example of an embodiment of an inkjet printer according to the present invention.
FIG. 2 is a flowchart illustrating an ink end detection method according to the present invention.
FIG. 3 is a flowchart illustrating an ink end counter initial value setting process according to the present invention.
FIG. 4 is a schematic diagram of ink near-end detection using an optical sensor.
[Explanation of symbols]
101 inkjet printer 102 interface 103 CPU
104 ROM
105 RAM
106 Inkjet head 107 Ink cartridge 108 Cleaning mechanism 109 Ink near-end sensor 110 Ink near-end detection mechanism 111 Display panel 112 Non-volatile memory 113 Switch 401 Optical sensor 402 Ink cartridge 403 Prism 404 Light emitting element 405 Light receiving element 406 Liquid level 407 Near end ink amount 408 End ink amount

Claims (21)

An ink near-end determining step of determining whether or not the remaining amount of ink in the ink cartridge is at the ink near end by detecting the physical ink amount;
An ink near-end counter counting step of counting the consumption of ink ejected from the nozzles of the inkjet head with an ink near-end counter from the time when the ink in the ink cartridge is full to the time when the ink near end determination step determines that the ink is near end; When,
An ink end counter initial value setting step of setting the amount of ink remaining in the ink cartridge as an ink end counter initial value at the time when the ink near end determination step determines that the ink is near end;
An ink end counter for setting the initial value of the ink end counter to an ink end counter after the ink near end determination step determines that the ink is near end, and counting the consumption of ink ejected from the nozzles of the inkjet head by the ink end counter. A counting step;
An ink end determination step of determining whether or not the ink end counter calculated from the ink end counter counting step has reached the ink end counter initial value;
An ink end detection method comprising: The ink end counter initial value setting step includes: a near end ink amount representing a physical ink amount from a state where the ink is full to the ink near end determination; and a physical ink remaining in the ink cartridge at the time of the ink near end determination. Based on the end ink amount representing the amount and the ink near end counter,
Temporary calculation of the ink end counter initial value from the temporary ink end counter initial value = ink near end counter × end ink amount / near end ink amount;
The ink end detection method according to claim 1, wherein: If the temporary ink end counter initial value is smaller than the minimum ink end counter initial value counted when the ink is consumed most in consideration of the variation of the individual inkjet printers, the ink end counter initial value is set to the minimum ink end counter. Correct to the initial value,
3. The ink end detection method according to claim 2, wherein: If the temporary ink end counter initial value is larger than the maximum ink end counter initial value counted when the ink is consumed the least in consideration of the variation of the individual inkjet printer, the ink end counter initial value is changed to the minimum ink end counter. Correct to the initial value,
3. The ink end detection method according to claim 2, wherein: When the temporary ink end counter initial value is equal to or larger than the minimum ink end counter initial value and equal to or smaller than the maximum ink end counter initial value, the initial ink end counter initial value is set to the temporary ink end counter initial value.
3. The ink end detection method according to claim 2, wherein: The ink near end counter and the ink end counter are stored and held in a nonvolatile memory when the power of the inkjet printer is turned off.
The ink end detection method according to claim 1, wherein: The ink near end counter and the ink end counter are read from a nonvolatile memory when power is turned on,
The ink end detection method according to claim 1, wherein: Whether or not the remaining amount of ink in the ink cartridge is at the ink near end; an ink near end determining means for determining by detecting the physical ink amount;
Ink near-end counter counting means for counting the amount of ink consumed from the nozzles of the inkjet head by an ink near-end counter from the time when the ink in the ink cartridge is full to the time when the ink near end determination means determines that the ink is near end. When,
An ink end counter initial value setting unit that sets the amount of ink remaining in the ink cartridge as an ink end counter initial value when the ink near end determination unit determines that the ink is near ink end;
An ink end counter that sets the initial value of the ink end counter to an ink end counter after the ink near end determination unit determines that the ink is near end; Counting means;
An ink end counter calculated by the ink end counter counting unit, an ink end determination unit that determines whether or not the ink end counter has reached an initial value;
An ink jet printer comprising: The ink end counter initial value setting means includes a near end ink amount representing a physical ink amount from a state of full ink to the ink near end determination, and a physical ink remaining in the ink cartridge at the time of the ink near end determination. Based on the end ink amount representing the amount and the ink near end counter,
Temporary calculation of the ink end counter initial value from the temporary ink end counter initial value = ink near end counter × end ink amount / near end ink amount;
The ink jet printer according to claim 8, wherein: If the temporary ink end counter initial value is smaller than the minimum ink end counter initial value counted when the ink is consumed most in consideration of the variation of the individual inkjet printers, the ink end counter initial value is set to the minimum ink end counter. Correct to the initial value,
The inkjet printer according to claim 9, wherein: If the temporary ink end counter initial value is larger than the maximum ink end counter initial value counted when the ink is consumed the least in consideration of the variation of the individual inkjet printer, the ink end counter initial value is changed to the minimum ink end counter. Correct to the initial value,
The inkjet printer according to claim 9, wherein: When the temporary ink end counter initial value is equal to or larger than the minimum ink end counter initial value and equal to or smaller than the maximum ink end counter initial value, the initial ink end counter initial value is set to the temporary ink end counter initial value.
The inkjet printer according to claim 9, wherein: The ink near end counter and the ink end counter are stored and held in a nonvolatile memory when the power of the inkjet printer is turned off.
The ink jet printer according to claim 8, wherein: The ink near end counter and the ink end counter are read from a nonvolatile memory when power is turned on,
The ink jet printer according to claim 8, wherein: An ink near end determination procedure for determining whether or not the remaining amount of ink in the ink cartridge is at the ink near end by detecting a physical ink amount;
An ink near-end counter counting procedure for counting the amount of ink consumed from the nozzles of the inkjet head by an ink near-end counter from the time when the ink in the ink cartridge is full to the time when the ink near-end is determined by the ink near-end determining procedure When,
An ink end counter initial value setting step of setting the amount of ink remaining in the ink cartridge as an ink end counter initial value at the time when the ink near end determination step determines that the ink is near end;
An ink end counter that sets the initial value of the ink end counter to an ink end counter and counts the amount of ink ejected from the nozzles of the inkjet head by the ink end counter after the ink near end is determined by the ink near end determination procedure. A counting procedure;
An ink end counter calculated by the ink end counter counting step, an ink end determination step of determining whether or not the ink end counter has reached an initial value;
A computer-readable information recording medium recording a program for executing a process including: The ink end counter initial value setting procedure includes a near-end ink amount representing a physical ink amount from a state where the ink is full to the ink near-end determination, and a physical ink remaining in the ink cartridge at the time of the ink near-end determination. Based on the end ink amount representing the amount and the ink near end counter,
Temporary ink end counter initial value = ink near end counter × end ink amount / near end ink amount;
The information recording medium according to claim 15, wherein the information recording medium records a program for executing a process including: If the temporary ink end counter initial value is smaller than the minimum ink end counter initial value counted when the ink is consumed most in consideration of the variation of the individual inkjet printers, the ink end counter initial value is set to the minimum ink end counter. Correcting to the initial value,
The information recording medium according to claim 16, wherein the information recording medium records a program for executing a process including: If the temporary ink end counter initial value is larger than the maximum ink end counter initial value counted when the ink is consumed the least in consideration of the variation of the individual inkjet printer, the ink end counter initial value is changed to the minimum ink end counter. Correcting to the initial value,
The information recording medium according to claim 16, wherein the information recording medium records a program for executing a process including: When the temporary ink end counter initial value is equal to or greater than the minimum ink end counter initial value and equal to or less than the maximum ink end counter initial value, setting the ink end counter initial value to the temporary ink end counter initial value;
The information recording medium according to claim 16, wherein the information recording medium records a program for executing a process including: The ink near end counter and the ink end counter are stored and held in a nonvolatile memory when the power of the inkjet printer is turned off,
The information recording medium according to claim 15, wherein the information recording medium records a program for executing a process including: Reading the ink near end counter and the ink end counter from the nonvolatile memory when power is turned on,
A computer-readable information recording medium recording a program for executing a process including:

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