JP2018176658A - Image recording device and image recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restart printing operation for a recording medium on which printing is suspended owing to abnormality of external power supply.SOLUTION: An image recording device 100 has: internal power supply which is connected to external power supply; printing means which is driven by the internal power supply and performs printing on a recording medium; a control part which is driven by the internal power supply and controls the printing means; power supply monitoring means which monitors a state of the external power supply; a capacitor which is connected to the internal power supply; and a first nonvolatile memory which stores printing parameters associated with the printing on the recording medium. If the power supply monitoring means detects abnormality of the external power supply during the printing on the recording medium, the control part is driven with electric energy accumulated in the capacitor to store the printing parameters in the first nonvolatile memory.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image recording apparatus and an image recording method, and more particularly to a control mechanism of printing operation when external power supply is restored after printing operation is stopped due to a power failure or the like.

In an image recording apparatus such as an ink jet printer, when the power supply is interrupted or instantaneously interrupted during printing and the printing operation is temporarily stopped, it is often the case that the image or document being printed must be discarded. This leads to wasteful consumption of paper and ink. Particularly in a large format printer capable of large size printing such as posters, which has been increasing in recent years, if printing is restarted from the beginning due to a power failure during printing, the burden on the user, the printing cost, the working time, etc. The same problem also occurs when instantaneous power interruption occurs frequently in an environment where power supply conditions are poor. Therefore, it is desirable to avoid the above problems by resuming the printing operation on the recording medium where printing has been interrupted halfway after restoration of the external power supply, as long as there is no problem with the quality of the product. .
Patent Document 1 discloses an ink jet recording apparatus provided with a control device that controls a printing operation and an abnormality detection unit that detects an abnormal state. When an abnormality is detected by the abnormality detection means, the control device stops printing and stores the printing stop position. The recording apparatus resumes printing from the printing stop position stored after resuming printing.

JP, 2012-20405, A

The abnormal states detected by the abnormality detection unit described in Patent Document 1 are ink amount reduction, conveyance abnormality, and ink particle flying abnormality, and an event that printing is interrupted due to an abnormality of the external power supply is not considered. That is, since the print stop position can not be stored when an abnormality occurs in the external power supply, it is impossible to resume printing itself.
An object of the present invention is to provide an image recording apparatus capable of resuming a printing operation on a recording medium in which printing is interrupted due to an abnormality in an external power supply.

  The image recording apparatus according to the present invention includes an internal power supply connected to an external power supply, a printing unit driven by the internal power supply to print on a recording medium, a control unit driven by the internal power supply to control the printing unit, It has power supply monitoring means for monitoring the state of the power supply, a capacitor connected to the internal power supply, and a first non-volatile memory for storing printing parameters related to printing on the recording medium. When an abnormality of the external power source is detected by the power source monitoring unit during printing on the recording medium, the control unit is driven by the electrical energy stored in the capacitor and stores the printing parameter in the first non-volatile memory Do.

  When the abnormality of the external power supply is detected by the power supply monitoring means, the control unit is driven by the electrical energy stored in the capacitor and stores the printing parameter in the first non-volatile memory. That is, after the abnormality of the external power supply is detected, the control unit stores the print parameter in the first non-volatile memory while the operation can be performed by the electrical energy stored in the capacitor. Since the first non-volatile memory can hold the printing parameters even if the electric energy stored in the capacitor is consumed, printing is performed with reference to the printing parameters stored in the first non-volatile memory after resuming printing. It can be resumed. Therefore, according to the present invention, it is possible to resume the printing operation on the recording medium in which the printing is interrupted due to the abnormality of the external power supply.

It is a schematic block diagram of the image recording device concerning one embodiment of the present invention. It is a flowchart which shows the process at the time of external power supply abnormality generation. It is a flowchart which shows the process at the time of external power recovery.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 (a) is a schematic view of an image recording apparatus according to an embodiment of the present invention, and FIG. 1 (b) is a perspective view of main components of the printing means. The image recording apparatus 100 is connected to a host (not shown) such as a PC. The image recording apparatus 100 is driven by an internal power supply 110 connected to an external power supply which is a commercial AC power supply, a printing unit 111 driven by the internal power supply 110 and printing by a recording medium, and a printing unit 111 driven by the internal power supply 110. And a control unit (CPU 104) to control. Here, the recording medium is a sheet, but may be a continuous sheet. The internal power supply 110 includes an AC / DC power supply 101 connected to an external power supply and converting AC voltage to DC voltage, and a DC / DC converter 102 connected to the AC / DC power supply 101. The AC / DC power supply 101 converts the external power supply into a DC voltage of 32 V output. The DC / DC converter 102 converts a DC voltage of output 32 V into DC voltages of a plurality of voltages for various components in the image recording apparatus 100. Specifically, a DC voltage of 1.1 V as a power supply for the core of the CPU 104, a DC voltage of 3.3 V and 5 V used for general I / O such as a sensor, and 12 V for driving some motors and actuators. And a DC voltage of As the DC voltage of 32 V used for driving the motor, the DC voltage of 32 V output from the AC / DC power supply 101 is used as it is.

  A secondary side capacitor 112 for voltage smoothing is mounted between the AC / DC power supply 101 and the DC / DC converter 102. The capacitor 112 can also supply drive energy to the CPU 104 when a power failure or a momentary loss occurs. The capacitor 112 is connected to the DC / DC converter 102, and can supply electrical energy to the DC / DC converter 102 for generating driving power of the CPU 104 for a fixed time, as described later.

  A power supply monitoring means 103 is provided between the connection part (outlet) of the external power supply and the AC / DC power supply 101. The power supply monitoring means 103 monitors the state of the external power supply. That is, the power supply monitoring means 103 monitors the input voltage to the AC / DC power supply 101, thereby a power interruption of the commercial AC power supply to which the image recording apparatus 100 is connected or a temporary interruption of the power supply due to a momentary interruption. To detect. In the present invention, when the voltage of the external power supply falls below the operable voltage of the AC / DC power supply 101 or the DC / DC converter 102, not only a power failure or instantaneous interruption, but also an abnormality occurs in the external power supply such as a sudden change in frequency. Can also be applied. When the power supply monitoring unit 103 detects a drop in the input voltage to the AC / DC power supply 101, the power supply monitoring unit 103 changes the signal level to the CPU 104 to notify the CPU 104 of an abnormality of the external power supply, particularly a power failure or a momentary interruption. The CPU 104 generates an interrupt in response to the change of the signal level, and performs control by software. The contents of the control will be described later.

  The image recording apparatus 100 includes a first non-volatile memory 105 a and a second non-volatile memory 105 b. The first non-volatile memory 105 a stores printing parameters related to printing on a recording medium based on an instruction from the CPU 104. In the second non-volatile memory, a print resumption index, which is an index of whether to permit resumption of printing, is stored in advance. The first non-volatile memory 105 a and the second non-volatile memory 105 b are physically the same non-volatile memory, but may be physically different non-volatile memories. The printing parameters include parameters such as the type of recording medium (media, recording paper) during printing, print quality, printing progress rate, etc. that are necessary or useful when printing is resumed. Details will be described later. These data stored in the first non-volatile memory 105 a and the second non-volatile memory 105 b are retained even if the AD power supply and the DC power are lost due to a drop in the external power supply voltage, a power failure, a momentary loss or the like.

  The printing unit 111 includes a liquid discharge head 106 that discharges a liquid such as ink, a carriage 107 that carries the liquid discharge head 106 and that reciprocates in the main scanning direction, and a line feed mechanism 108. The liquid discharge head 106 employs an inkjet method. The liquid discharge head 106 can be replaced by the user. The carriage 107 is driven by a carriage motor (not shown) to reciprocate on the recording medium in the main scanning direction. The liquid ejection head 106 ejects ink at a predetermined position on the recording medium in synchronization with the scanning of the carriage 107 to form an image. When printing from the start to the end in the scan area is completed, the recording medium is sent by the line feed mechanism 108 in the sub-scanning direction (direction orthogonal to the main scanning direction), and the next scan is performed. The timer 109 is configured to be able to start and stop counting and to read the count value. The timer 109 is usually realized by measuring time using a counter based on a clock in the CPU 104.

  FIG. 2 is a flow chart showing processing when an external power supply abnormality occurs. Here, a flow of processing performed in the image recording apparatus 100 when a voltage drop of the DC power occurs due to a momentary interruption or a power failure of the commercial AC power will be described. The power supply monitoring unit 103 monitors the voltage drop of the commercial AC power supplied to the AC / DC power supply 101 (step S101). The power supply monitoring means 103 continues monitoring when not detecting the voltage drop of the commercial AC power supply, and notifies the CPU 104 when the voltage drop is detected. The determination of the voltage drop of the commercial AC power source is performed by monitoring the waveform of the AC input (frequency 50 Hz or 60 Hz). Instead of directly monitoring the waveform of the AC input, it may be possible to predict a decrease in the secondary side DC voltage (the output DC voltage of the DC / DC converter 102) by measuring the time during which the AC input is stopped. . Alternatively, the stop of the AC input may be estimated by monitoring the voltage between terminals of a primary electrolytic capacitor (not shown) inside the AC / DC power supply 101. When a momentary interruption or power failure occurs, the charge stored in the primary electrolytic capacitor decreases, and conversion to the secondary side DC voltage can not be performed.

  When detecting the notification from the power supply monitoring unit 103, the CPU 104 determines whether the image recording apparatus 100 is currently printing (step S102). When the printing is not performed, the CPU 104 performs a power-off process of the image recording apparatus 100 (step S104). Since the power supply to the AC / DC power supply 101 is stopped, the supply of 32 V power from the AC / DC power supply 101 to the DC / DC converter 102 is also stopped. At this time, the 32 V power supply is maintained by the charge stored in the capacitor 112. When the discharge of the capacitor 112 proceeds and the supply voltage to the DC / DC converter 102 falls below the lower limit operating voltage of the DC / DC converter 102, the supply of DC power from the DC / DC converter 102 is stopped, and the CPU 104 is also stopped. Therefore, the CPU 104 completes the power-off process until the DC power supply from the DC / DC converter 102 is stopped. Since the image recording apparatus 100 does not perform the printing operation, the consumption of the charge of the capacitor 112 is small. Therefore, the time for the CPU 104 to perform the power-off process is secured. During this time, the CPU 104 is driven by the electric energy stored in the capacitor 112, and stores parameters necessary for the next start in the first non-volatile memory 105a. Drive by the electrical energy stored in the capacitor 112 is more precisely generated from the electrical energy stored in the capacitor 112, and the CPU 104 is driven by the CPU drive DC voltage output from the DC / DC converter 102. It means to be done. After the end of the process, the image recording apparatus 100 including the CPU 104 stops its operation in accordance with the decrease of the supply voltage from the DC / DC converter 102.

  Even when the image recording apparatus 100 is printing in step S102, the CPU 104 performs necessary processing until the supply of DC power from the DC / DC converter 102 is stopped and the CPU 104 is stopped. The CPU 104 first causes the printing unit 111 to stop. Specifically, the CPU 104 stops the motor that directly consumes 32 V, which is the secondary side DC power supply, and stops the power supply to the liquid discharge head 106. As a result, consumption of the charge stored in the capacitor 112 is suppressed. Since printing is performed on the recording medium, the carriage 107 reciprocates in the image recording apparatus 100, ink is ejected from the liquid ejection head 106, and the line feed mechanism 108 conveys the recording medium in synchronization with the movement of the carriage 107. It has been done. Since the supply of DC power is stopped, the carriage 107 is likely to stop on the recording medium, that is, between the start and end points in the main scanning direction. Printing of an image is interrupted in the middle of scanning of the carriage 107, and a recording medium in the middle of printing is left in the image recording apparatus 100.

  Next, the CPU 104 stores the print parameter in the first non-volatile memory 105 a. The print parameters include the type of print medium being printed, print quality, print progress rate, position information of abnormal print data, and the like. The type of recording medium is the type of recording medium such as plain paper and glossy paper. The print quality is a print mode such as a "fine" mode, a "normal" mode, or an "early" mode. The printing progress rate is a ratio of the amount of printing (printed data) to the amount of printing (printing data) per page of the recording medium. The position information of the abnormal print data is the position information of the print data related to the scan when the state of the external power supply is determined to be abnormal. The abnormal print data means a fixed amount of block data (hereinafter referred to as a scan block) printed by one scan by the image recording apparatus 100 having the carriage 107. For example, if print data per page consists of 10 scan blocks and it is determined that the state of the external power supply is abnormal during printing of the seventh scan block, the abnormal print data is the seventh scan block. Further, the position information of the abnormal print data is information that the scan block is the seventh. The position information of the abnormal print data may be address information in the print data of a portion where printing is performed (or immediately before or immediately after printing) when the state of the external power supply is determined to be abnormal.

  Although the DC voltage on the secondary side is lowered and the motor and the liquid discharge head 106 can not be driven, the CPU 104 keeps the DC voltage within the operation lower limit voltage of the DC / DC converter 102 that generates the drive voltage of the CPU 104. It is in an operable state. Therefore, while the CPU 104 itself is operable, the CPU 104 writes the print parameter to the first non-volatile memory 105 a (step S103). Thereafter, the CPU 104 performs a power off process (step S104).

  Next, processing after recovery from a power failure state will be described using FIG. FIG. 3 is a flow chart showing processing upon restoration of the external power supply. First, power on processing is performed. The CPU 104 determines whether or not the power on is a recovery from a power failure during printing (step S201). When the print parameter is stored in the first non-volatile memory 105 a, it can be determined that it is a recovery from a power failure during printing. If it is not the recovery from the power failure during printing, the image recording apparatus 100 is normally activated (step S210). In the case of recovery from a power failure during printing, there is a high possibility that there is a recording medium whose printing has been interrupted in the line feed mechanism 108 and the carriage 107 on which the recording head 106 is mounted is stopped. .

  The CPU 104 reads out the print parameters, that is, the type of recording medium, print quality (print mode), print progress rate, and position information of abnormal print data from the first non-volatile memory 105a (step S202). At the same time, the CPU 104 reads the printing resumption indicator from the second non-volatile memory 105 b. The CPU 104 determines whether to resume printing based on the print parameters and the print resumption indicator (step S203). How the determination is made will be described later. If it is determined that printing is to be resumed, printing is resumed by driving the carriage 107 anew from the beginning of the abnormal print data stopped halfway. For this purpose, the CPU 104 first acquires a scan block to resume printing from the position information of the abnormal print data read in step S202 (step S205). For example, if it is determined that the state of the external power supply is abnormal during printing of the seventh scan block as described above, the CPU 104 determines that the scan block to resume printing is the seventh scan block. Next, the CPU 104 requests the host for print data after the top of the abnormal print data for which printing is to be resumed, and acquires print data after the top of the abnormal print data (step S206). That is, the CPU 104 acquires data of scan blocks after the seventh scan block from the host. Next, the CPU 104 moves the carriage 107 to the start point in the main scanning direction, and resumes printing from the start point (step S207). Next, the CPU 104 determines whether printing of the page is completed (step S208). When printing is completed, the CPU 104 erases the print parameter stored in the first non-volatile memory 105 a (step S 209). As a result, when the image recording apparatus 100 is activated next time, the print parameter is not stored in the first non-volatile memory 105a, and thus the CPU 104 determines that the activation is a normal activation that is not recovery from a power failure. It can be determined. If the printing of the page has not been completed, an uncompleted process is performed (step S211), and the image recording apparatus 100 continues printing until the printing is completed.

  Next, how to determine whether to resume printing will be described. Depending on the contents of the printing parameters described above, it may not be desirable to resume the printing operation on the recording medium where printing has been interrupted halfway. That is, the product created by resuming printing on the recording medium once printing has been interrupted may not have the print quality normally expected for the printing parameters. In this case, printing on a new recording medium will eventually be redone, which may increase printing cost and work time. For this reason, in the present embodiment, it is determined whether printing is to be resumed in consideration of print parameters.

  Table 1 shows specific examples of printing parameters. The print parameters include a plurality of parameters each of which is digitized. Here, examples of the type of recording medium and the print quality (print mode) are shown. The types of recording media are plain paper and glossy paper, and 1.2 and 1.0 are assigned as index values, respectively. The print quality (print mode) is three, "clean", "normal", and "early", and 1.2, 1.0, and 0.8 are assigned as index values. The print resumption index is a preset numerical value, and is set to 1.0 here.

  The CPU 104 calculates a product of the index value of the type of recording medium and the index value of the print quality, and compares the obtained product with the print resumption index. The CPU 104 permits resumption of printing when the multiplication value is larger than the printing resumption index, and does not permit resumption of printing when the multiplication value is the same as or smaller than the printing resumption index. For example, when the recording medium is glossy paper and the print quality is "normal", the multiplication value is 1.2, which is larger than the print resumption index (= 1.0), and the CPU 104 permits resumption of printing. If the resumption of printing is not permitted, the display may be displayed on the display of the image recording apparatus 100. The recording medium is automatically ejected, and printing is performed from the beginning on a new recording medium. A message may be displayed on the display prompting the user to discharge the paper, and printing may be performed on a new recording medium after the user discharges the paper. By setting the index value of glossy paper to be higher than the index value of plain paper, expensive glossy paper can be more easily permitted to resume printing than plain paper, and the disadvantage of the user can be avoided. The "clean" mode is a printing mode that consumes a large amount of ink and is expensive to print, so that resumption of printing is likely to be permitted. Here, printing restart is permitted when the product of the index value of the print parameter is larger than the print restart index, but when the product of the index value of the print parameter is smaller than the print restart index by changing the index value May be allowed to resume. In this case, the index value of glossy paper is set to be lower than the index value of plain paper, and the index value of print quality is set to decrease in the order of "fast", "normal" and "fine". In any case, the CPU 104 determines whether to resume printing based on the magnitude relation between the product of index values of a plurality of parameters and the printing resumption index.

  The user can also input at least one of the printing parameter index value and the printing resumption index. For that purpose, the image recording apparatus 100 may be provided with input means (not shown) for the index value of the printing parameter and the printing resumption index. The input means may be a touch panel or a button provided in the image recording apparatus 100, or may be software means for receiving and storing the printing resumption indicator input from the host. For example, when the print mode is the "clean" mode, the desired print quality may not be obtained even if printing is resumed. In that case, the user can set the printing resumption index to a larger value, so that it is possible to make it difficult for the resumption of printing to be permitted even in the "clean" mode. The print resumption indicator can also be set to a smaller number to facilitate resumption of printing regardless of print parameters. If the print quality expected for the "clean" mode is not very high, setting the index value corresponding to the "clean" mode to a larger value (for example, 1.4) makes it easy to allow restart of printing. It can also be done.

  In addition, when printing on glossy paper in the "clean" mode, it is generally expected that the print quality is expected to be high. In such a case, it may be considered that the quality of the image completed by resuming printing on glossy paper does not meet the user's expectation, and therefore, it may be desirable to set a setting for actively avoiding resumption of printing. On the other hand, when high print quality is not expected as in the case of printing in the "early" mode on plain paper, there may be a setting that actively restarts printing. That is, it is also conceivable that the user takes a completely opposite idea to the above-mentioned idea. In this case, when the multiplication value of the index value of the printing parameter is smaller than the printing resumption index, it can be set to permit resumption of printing. The user can also set the magnitude relation between the product of the index value of the print parameter and the print resumption index via the input unit.

  It is also possible to make the user judge the printing restart from the power failure recovery each time. In this case, the product of the print parameter and the print resumption indicator may be displayed on the display of the image recording apparatus 100 as reference data for the user's judgment. Different processes can be performed depending on the type of print medium and the print quality. For example, when using plain paper, the image recording apparatus 100 can automatically determine whether printing can be resumed or not, and when using glossy paper, it can determine whether printing can be resumed according to a user's instruction.

  It is also possible to consider the printing progress rate in the determination of printing resumption. For example, the index value in the case where the printing progress rate is 80% or more is 1.1, the index value in the case of 20 to 80% is 1.0, and the index value in the case of less than 20% is 0.9. Multiply by That is, the product of the index value of the type of recording medium, the index value of the print quality, and the index value of the print progress rate is calculated, and the obtained multiplication value is compared with the print resumption index. If printing is interrupted and printing is performed again on a new recording medium when the printing progress rate is high, printing cost and printing time will be wasted. it can.

  The printing parameters can also include an elapsed time from when the external power supply state is determined to be abnormal to when it is determined that the normal state is restored, that is, an elapsed time from when printing stops to when it resumes. In this case, the CPU 104 reads the time when the state of the external power supply is determined to be abnormal from the timer built in the CPU 104, and stores the time in the first non-volatile memory 105a. The CPU 104 reads the time when the image recording apparatus 100 is restarted from the timer, and calculates the elapsed time from the time stored in the first non-volatile memory 105 a. In the inkjet method, depending on the elapsed time of the already printed image, a difference in color from the image to be printed next may occur. By changing the judgment based on whether the printing stop due to the power supply stop is due to a short stop due to a momentary stop of the power or a relatively long time blackout, printing is performed for the print job for which a stop about the momentary stop occurred. A setting that makes it easy to restart is possible. For example, it is conceivable to assign 1.1 as an index value to an elapsed time of 1 second or less and 0.9 as an index value to an elapsed time exceeding 1 second.

DESCRIPTION OF SYMBOLS 100 Image recording apparatus 101, 102 Internal power supply 103 Power supply monitoring means 104 Control part 105a 1st non-volatile memory 105b 2nd non-volatile memory 111 printing means 112 capacitor

Claims (13)

An internal power supply connected to an external power supply,
A printing unit which is driven by the internal power supply and performs printing on a recording medium;
A control unit which is driven by the internal power source and controls the printing unit;
Power supply monitoring means for monitoring the state of the external power supply;
A capacitor connected to the internal power supply,
A first non-volatile memory for storing print parameters relating to printing on the recording medium;
When an abnormality of the external power source is detected by the power source monitoring unit during printing on the recording medium, the control unit is driven by the electrical energy stored in the capacitor, and An image recording apparatus which stores data in one non-volatile memory.   The image recording apparatus according to claim 1, wherein the print parameters include parameters related to the type of the recording medium and the print quality. A second non-volatile memory in which a print resumption indicator, which is an indicator of whether to permit resumption of printing, is stored in advance;
The control unit causes the print parameter stored in the first non-volatile memory and the print resumption index stored in the second non-volatile memory to be restored when the external power supply returns to a normal state. The image recording apparatus according to claim 1, wherein it is determined based on whether or not printing is to be resumed. The printing means has a liquid discharge head for discharging a liquid, and a carriage which carries the liquid discharge head and reciprocates in the main scanning direction.
The print parameter includes position information of abnormal print data related to scanning when it is determined that the state of the external power supply is abnormal, and the control unit determines that the printing is to be resumed, the first non-volatile memory The print data after the top of the abnormal print data is requested to the host connected to the image recording apparatus based on the position information stored in the above, the carriage is moved to the start point in the main scanning direction, and printing is performed from the start point The image recording apparatus according to claim 3, which resumes.   The printing parameter includes a printing progress rate when the state of the external power supply is determined to be abnormal, and the control unit performs printing based on the printing progress rate stored in the first non-volatile memory. The image recording apparatus according to claim 3, wherein it is determined whether to resume.   The printing parameter includes an elapsed time from when the state of the external power source is determined to be abnormal to when it is determined that the state is restored to a normal state, and the control unit is stored in the first non-volatile memory The image recording apparatus according to any one of claims 3 to 5, wherein whether to resume printing is determined based on the elapsed time.   The printing parameter includes a plurality of parameters each of which is digitized, the printing restart index is a preset numerical value, and the control unit determines a magnitude relation between a product of the plurality of parameters and the printing restart index. The image recording apparatus according to any one of claims 3 to 6, wherein it is determined whether or not printing is to be resumed based on.   The image recording apparatus according to claim 7, further comprising input means for changing the magnitude relationship.   The image recording apparatus according to any one of claims 3 to 8, further comprising input means for at least one of the printing resumption index and the printing parameter.   The image according to any one of claims 1 to 9, wherein the control unit stops the operation of the printing unit when it is determined that the state of the external power supply is abnormal during printing on the recording medium. Recording device.   The image recording apparatus according to any one of claims 1 to 10, wherein the abnormality of the external power supply is a stop of supply of the external power supply or a voltage drop. An internal power supply connected to an external power supply, a printing unit driven by the internal power supply for printing on a recording medium, a control unit driven by the internal power supply for controlling the printing unit, and a state of the external power supply Image recording apparatus using an image recording apparatus comprising: power supply monitoring means for monitoring; a capacitor connected to the internal power supply; and a first nonvolatile memory for storing printing parameters related to printing on the recording medium Method,
When the state of the external power supply is determined to be abnormal by the power supply monitoring unit during printing on the recording medium, the control unit is driven by the electrical energy stored in the capacitor to generate the printing parameter. An image recording method comprising storing in the first non-volatile memory. In the second non-volatile memory, a print resumption indicator, which is an indicator of whether to permit resumption of printing, is stored in advance.
When the external power supply returns to a normal state, the control unit causes the print parameter stored in the first non-volatile memory, and the print resumption indicator stored in the second non-volatile memory. 13. The image recording method according to claim 12, wherein it is determined whether to resume printing based on.

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