Method for optimizing ink dot modulation value of inkjet printer and computer readable storage medium

Abstract

The present invention discloses an optimization method for ink dot modulation value of an inkjet printer and a computer-readable storage medium. The method comprises: S1, incrementally setting the ink dot modulation value of the inkjet printer based on a set span value; S2, after each setting of the ink dot modulation value, performing threshold optimization processing to generate an optimal detection threshold of the ink dot modulation value; S3, after each generation of the optimal detection threshold, performing phase optimization processing to obtain an optimal phase of the ink dot modulation value; S4, after each generation of the optimal phase, performing modulation value trend analysis, and confirming the optimal modulation value of the inkjet printer based on the analysis result, or returning to S1; the implementation of the present invention can efficiently find the optimal modulation value of the inkjet printer, and the obtained optimal modulation value has the advantages of high accuracy, wide deviation range, etc., and can effectively improve the stability and reliability of the inkjet printer.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printers, and in particular to a method for optimizing ink dot modulation values ​​of inkjet printers and a computer-readable storage medium. Background Art

[0002] Due to the different physical properties caused by the mechanical structure and process of the nozzle of the inkjet printer, different nozzles often present different available ink dot modulation value ranges even under the same working environment. Among them, the ink dot modulation value range refers to the voltage range sent to the nozzle of the inkjet printer to make it work. The current conventional practice is to judge the optimal modulation value by manually observing the ink line or observing the printing effect under different ink dot modulation values. The so-called optimal modulation value, that is, once this value is set, it can ensure that the inkjet printer maintains a good printing effect in a relatively stable working environment, and when the working environment of the inkjet printer is affected to a certain extent, this value is still within the offset modulation range, thereby ensuring the stable operation of the inkjet printer. The way to find this value through manual intervention requires technical personnel to undergo professional training to accurately find this value. It has defects such as low efficiency and easy deviation, which has a great impact on the user experience. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for optimizing ink dot modulation values ​​of an inkjet printer and a computer-readable storage medium in response to at least one defect of the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: constructing a method for optimizing the ink dot modulation value of a printer, comprising the following steps:

[0005] S1, incrementally setting the ink dot modulation value of the inkjet printer based on the set span value;

[0006] S2, after setting the ink dot modulation value each time, performing threshold optimization processing to generate an optimal detection threshold value for the ink dot modulation value;

[0007] S3, after generating the optimal detection threshold each time, performing phase optimization processing to obtain the optimal phase of the ink dot modulation value;

[0008] S4. After generating the optimal phase each time, perform a modulation value trend analysis, and confirm the optimal modulation value of the inkjet printer according to the analysis result, or return to S1.

[0009] Preferably, in S2, the threshold optimization process includes:

[0010] The detection threshold in the phase detection process is not adjusted repeatedly, and each time the detection threshold is adjusted, the phase detection process is performed to obtain a digital signal;

[0011] If the digital signal meets the set requirements, the detection threshold set at this time is recorded as the optimal detection threshold of the ink dot modulation value, and the ink dot modulation value is calibrated as the available ink dot modulation value;

[0012] If the digital signal that meets the set requirement cannot be obtained by adjusting the detection threshold, the ink dot modulation value is calibrated as an unusable ink dot modulation value.

[0013] Preferably, in S2, the phase detection process includes:

[0014] Generate a plurality of charging instructions with different phases, so that the ink dots are charged with the ink dot modulation values ​​with different phases; and collect the digital signal output by the phase collection circuit in the inkjet printer.

[0015] Preferably, the S2 further includes:

[0016] It is determined whether the absolute value of the difference between the high level and the low level in the digital signal is less than a first set number. If so, it is determined that the digital signal meets the set requirement; otherwise, it is determined that the digital signal does not meet the set requirement.

[0017] Preferably, the phase optimization process includes:

[0018] The detection threshold is set to the optimal detection threshold, and the phase detection processing is performed. During the phase detection processing, the charge amount of the ink dots after being charged at different phases is collected, and the phase corresponding to the maximum of each charge amount is taken as the optimal phase of the available ink dot modulation value.

[0019] Preferably, the S4 includes:

[0020] S41, determining whether the available ink dot modulation values ​​corresponding to the latest phase set are continuously increased based on the set span value, and if so, executing S42, otherwise returning to S1; wherein the latest phase set includes the second set number of the best phases obtained most recently;

[0021] S42, judging whether the latest phase set conforms to the set trend, if so, taking the middle value of each available ink dot modulation value corresponding to the latest phase set as the optimal modulation value, otherwise returning to S1.

[0022] Preferably, in S42, judging whether the latest phase set conforms to a set trend includes:

[0023] Performing curve fitting based on the latest phase set and the corresponding optimal modulation values ​​to obtain a trend curve; the horizontal axis parameter of the trend curve is the available ink dot modulation value, and the vertical axis parameter of the trend curve is the optimal phase;

[0024] If the trend curve shows a trend of decreasing first and then increasing, and the available ink dot modulation value corresponding to the minimum value of the ordinate of the trend curve is located in the middle area of ​​the abscissa axis of the trend curve, it is determined that the latest phase set meets the set trend.

[0025] Preferably, in said S4, said second set number is set to 9 by default.

[0026] Preferably, the S1 further includes:

[0027] If the ink dot modulation value after setting is greater than the modulation upper limit value, the set span value and / or the second set number are adjusted, and the ink dot modulation value is set to the modulation lower limit value before executing S2.

[0028] The present invention also provides a system for optimizing ink dot modulation values ​​of inkjet printers using a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is suitable for loading by a processor to execute the steps of the method for optimizing ink dot modulation values ​​of inkjet printers provided in an embodiment of the present invention.

[0029] The present invention has the following beneficial effects: providing a method for optimizing the ink dot modulation value of an inkjet printer; incrementally setting the ink dot modulation value of the inkjet printer based on a set span value; performing threshold optimization processing after each ink dot modulation value is set to generate an optimal detection threshold of the ink dot modulation value to accurately detect the phase angle, thereby providing more reference data for subsequent steps and improving the detection accuracy; performing phase optimization processing after each optimal detection threshold is generated to obtain the optimal phase of the ink dot modulation value to prepare for modulation value trend analysis; performing modulation value trend analysis after each optimal phase is generated, and confirming the optimal modulation value of the inkjet printer based on the analysis result; implementing the present invention can efficiently find the optimal modulation value of the inkjet printer, and the obtained optimal modulation value has the advantages of high accuracy and a wide deviation range, and can effectively improve the stability and reliability of the inkjet printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0031] Figure 1 It is a flow chart of the method for optimizing the ink dot modulation value of the inkjet printer provided by the present invention;

[0032] Figure 2 It is a circuit diagram of a phase acquisition circuit in one embodiment of an inkjet printer;

[0033] Figure 3 It is a flow chart of step S4 in the method for optimizing the ink dot modulation value of the inkjet printer provided by the present invention;

[0034] Figure 4 The figure is a trend curve diagram of an embodiment. DETAILED DESCRIPTION

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0036] It should be noted that the flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0037] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0038] refer to Figure 1 The present invention provides a method for optimizing ink dot modulation values ​​of an inkjet printer, comprising: step S1, step S2, step S3 and step S4.

[0039] Step S1 includes: setting the ink dot modulation value of the inkjet printer incrementally based on the set span value. Specifically, when step S1 is executed for the first time, the ink dot modulation value is set to a default starting value (generally the lower limit of the modulation value voltage range, 5V in this embodiment), and then when step S1 is executed again, the ink dot modulation value is set incrementally based on the set span value. Taking a common small character inkjet printer as an example, the voltage range of its ink dot modulation value is generally 5V to 99V. It can be understood that the smaller the set span value, the more times the ink dot modulation value is measured within the set voltage range, but the program calculation amount increases and the time consumption increases, but it is conducive to finding a better ink dot modulation value, so the set span value can be set based on user needs.

[0040] Step S2 includes: after setting the ink dot modulation value each time, performing a threshold optimization process to generate an optimal detection threshold of the ink dot modulation value.

[0041] Specifically, after each setting of the ink dot modulation value, in order to verify the actual effect of the newly set ink dot modulation value, the newly set ink dot modulation value will also cause differences in the charging effect of the ink dots after charging due to different phases. Therefore, it is necessary to perform phase detection processing on the newly set ink dot modulation value to verify its actual effect.

[0042] It should be noted that the inkjet printer in the embodiment of the present invention includes a controller (the controller can be a program execution device such as a computer or a single-chip microcomputer), a phase detection board, a phase acquisition circuit, an ink dot charging device, a charge acquisition circuit and other necessary equipment; wherein the controller is a mechanism for executing the embodiment provided by the present invention, and is also responsible for controlling the operation of other related equipment of the inkjet printer; the phase detection board is used to measure the phase of the ink dot after charging; the phase acquisition circuit is used to convert the analog signal output by the phase detection board into a digital signal, and transmit the digital signal to the controller; the ink dot charging device is used to charge the ink dot based on the ink dot modulation value and the corresponding phase; the charge acquisition circuit is used to collect the actual charge of the ink dot after charging, and transmit the collected information to the controller. Furthermore, the inkjet printer needs to use the phase detection board to detect the phase of the charged ink dot for phase detection processing, and the signal output by the phase detection board is an analog signal, so the phase acquisition circuit needs to convert it into an analog-to-digital conversion before entering the controller; the analog-to-digital conversion can be achieved using a comparison circuit, by comparing the analog signal with a fixed detection threshold to obtain a digital signal. Figure 2 Taking the phase acquisition circuit shown as an example, if the voltage value of the analog signal at the inverting input terminal of the operational amplifier U23 is less than the detection threshold of the inverting input terminal of the operational amplifier U23, the phase acquisition circuit outputs a digital signal "1", otherwise if the voltage value of the analog signal is greater than the detection threshold, the phase acquisition circuit outputs a digital signal "0"; then, the controller determines the validity and reliability of the ink dot modulation value based on the digital signal. The size of the ink dot modulation value may affect the size of the analog signal output by the phase detection board. If the detection threshold is not suitable, it will affect the controller's judgment result on the newly set ink dot modulation value. In other words, different ink dot modulation values ​​require corresponding detection thresholds to better reflect the actual effect of the ink dot modulation value.

[0043] Furthermore, in some embodiments, the threshold optimization process in step S2 includes: not repeatedly adjusting the detection threshold in the phase detection process, and performing phase detection process to obtain a digital signal after each adjustment of the detection threshold; if the digital signal meets the set requirements, then recording the detection threshold set at this time as the optimal detection threshold of the ink dot modulation value, and calibrating the ink dot modulation value as an available ink dot modulation value; if the digital signal meeting the set requirements cannot be obtained by adjusting the detection threshold, then calibrating the ink dot modulation value as an unavailable ink dot modulation value. It can be understood that the principle of the threshold optimization process is: by dynamically adjusting the detection threshold ( Figure 2The voltage value of the P1_PHASE_REF signal shown in the figure can be directly provided or controlled by the ADC port of the controller), and targeted phase detection processing is performed on each detection threshold to obtain the corresponding digital signal to prepare for the subsequent steps.

[0044] In some embodiments, the phase detection process includes: generating a number of charging instructions of different phases, so that the ink dots are charged with ink dot modulation values ​​of different phases; and collecting the digital signal output by the phase acquisition circuit in the inkjet printer. Specifically, in this embodiment, the ink dot modulation value voltage input to the nozzle is a sine wave, so a number of charging instructions of different phases can be obtained by equally dividing the phase of the sine wave of a single cycle; each time the ink dot charging device of the inkjet printer receives a charging instruction, it will charge the ink dots at the moment of the phase represented by the corresponding charging instruction under the currently set ink dot modulation value voltage; when all charging instructions are executed, the controller can obtain a digital signal.

[0045] Preferably, a single cycle of the sine wave can be divided into 16 equal parts, that is, the computer or single-chip microcomputer that executes the steps will generate 16 charging instructions, which means that the phase detection processing requires charging the ink dot (which can be different ink dots; or the same ink dot, but the amount of electricity stored in the ink dot needs to be released before charging) 16 times, corresponding to a 16-bit digital signal.

[0046] In some embodiments, in step S2, the basis for judging whether the digital signal meets the set requirements is: judging whether the absolute value of the difference between the high level and the low level in the digital signal is less than the first set number. If so, it is judged that the digital signal meets the set requirements, otherwise it is judged that the digital signal does not meet the set requirements. Specifically, if the detection threshold is too small or too large, it may cause the polarization of "0" and "1" of the digital signal output by the phase acquisition circuit, affecting the validity and reliability judgment of the ink dot modulation value (large difference in quantity means low reliability). Therefore, it is necessary to make a judgment when the number of high level and low level in the digital signal is similar to obtain a judgment result with high reliability. In other words, the difference in the number of high level and low level in the digital signal can be used as a parameter for judging whether the detection threshold is suitable. Further, the first set number can be set according to the number of charging instructions. In principle, the more the number of charging instructions, the smaller the first set number is required. For example, in an embodiment where the number of charging instructions is 16, the first set number can be set to 1. If the number of charging instructions is 32, the first set number can be set to 3. It should be noted that in this embodiment, the absolute value of the difference in quantity is the absolute value of the difference between the number of high level and the number of low level in the digital signal.

[0047] Step S3 includes: after generating the best detection threshold each time, performing phase optimization processing to obtain the best phase of the ink dot modulation value.

[0048] In some embodiments, the phase optimization process in step S3 includes: setting the detection threshold to the optimal detection threshold, performing phase detection processing, and in the process of phase detection processing, collecting the charge amount of the ink dot after charging at different phases, and taking the phase corresponding to the maximum of each charge amount as the optimal phase of the available ink dot modulation value. Specifically, when the controller collects the phase detection process through the charge amount collection circuit, the actual charge amount of each or each ink dot after charging can generally be represented by the effective value of the voltage of the ink dot. The larger the effective value of the voltage value, the larger the charge amount and the better the charging effect; after the actual charge amount is collected, the maximum charge amount is obtained through comparison and analysis, and the charging instruction corresponding to the maximum charge amount is found, and the phase corresponding to the corresponding charging instruction is the optimal phase of the available ink dot modulation value.

[0049] Step S4 includes: after each optimal phase is generated, performing a modulation value trend analysis, and confirming the optimal modulation value of the inkjet printer based on the analysis results, or returning to step S1, resetting the ink dot modulation value, and then continuing to execute steps S2 to S4 until the optimal modulation value is confirmed.

[0050] In some embodiments, such as Figure 3 As shown, step S4 includes: step S41 and step S42.

[0051] Step S41 includes: determining whether each available ink dot modulation value corresponding to the latest phase set is continuously increased based on the set span value, if so, executing step S42, otherwise returning to step S1; wherein the latest phase set includes the latest obtained second set number of optimal phases.

[0052] The following is an example of the process of executing step S41:

[0053] (1) Assume that the second setting number is 3, the setting span value is 1V, and the default starting value is 5V;

[0054] (2) If the best phases obtained are (A, 5V), (B, 6V), (C, 8V) and (D, 9V), there are 4 groups of data in total, where A, B, C and D correspond to the best phases, and 5V, 6V, 8V and 9V correspond to the available ink dot modulation values ​​corresponding to the best phases in the same group of data; then, the latest phase set includes B, C and D. Obviously, 6V, 8V and 9V are non-continuously increasing cases, because 7V is an unavailable ink dot modulation value. Therefore, in this embodiment, it will be determined that the available ink dot modulation values ​​corresponding to the latest phase set are not continuously increasing based on the set span value, that is, the next step will return to step S1;

[0055] (3) If the best phases obtained are (A, 5V), (B, 6V), (C, 7V) and (D, 8V) respectively, it is obvious that in this embodiment, 6V, 7V and 8V are continuously increasing. It will be determined that the available ink dot modulation values ​​corresponding to the latest phase set are continuously increasing based on the set span value, that is, step S42 will be executed in the next step.

[0056] Preferably, the second set number defaults to 9. It is understandable that the user can also set the second set number as needed before executing the optimization method. In principle, the smaller the second set number, the easier and faster it is to find the optimal modulation value, but the smaller the deviation range of the found optimal modulation value.

[0057] Step S42 includes: judging whether the latest phase set conforms to the set trend, if so, taking the middle value of each available ink dot modulation value corresponding to the latest phase set as the optimal modulation value, otherwise returning to S1. It can be understood that taking the middle value of each available ink dot modulation value corresponding to the latest phase set as the optimal modulation value can be the optimal modulation value with a good offset range, which is conducive to improving the stability of inkjet printer charging ink dots.

[0058] In some embodiments, in step S42, judging whether the latest phase set conforms to the set trend includes: performing curve fitting based on the latest phase set and its corresponding optimal modulation values ​​to obtain a trend curve; the horizontal axis parameter of the trend curve is the available ink dot modulation value, and the vertical axis parameter of the trend curve is the optimal phase; if the trend curve shows a trend of decreasing first and then increasing, and the available ink dot modulation value corresponding to the lowest point of the trend curve is located in the middle area of ​​the horizontal axis of the trend curve, then it is judged that the latest phase set conforms to the set trend. Among them, the middle area of ​​the horizontal axis is the range of the midpoint of the trend curve on the horizontal axis to the left and right of the set value. It can be understood that the larger the set value, the larger the range of the middle area of ​​the horizontal axis, making it easier to find the optimal modulation value, but it will reduce the reliability of the optimal modulation value. Generally, the set value is equal to the set span value by default.

[0059] Figure 4 It should be noted that the span from point L to point H just includes the second set number of optimal phases, such as Figure 4 As shown, the graph from point L to point H is roughly a "V"-shaped curve, which conforms to the trend of first decreasing and then increasing, and the lowest point M of the trend curve LH is located in the middle area of ​​the horizontal axis of the trend curve LH. Therefore, it can be determined that the latest phase set corresponding to the trend curve LH conforms to the set trend.

[0060] In some embodiments, step S1 further includes: if the ink dot modulation value after setting is greater than the modulation upper limit value, the set span value and / or the second set quantity are adjusted, and the ink dot modulation value is set to the modulation lower limit value before executing step S2. Specifically, if the ink dot modulation value after setting is greater than the modulation upper limit value, it means that the setting of the ink dot modulation value has exceeded the upper limit value of the modulation value voltage range, and the optimal modulation value has not yet been confirmed, so the optimization requirement can be appropriately reduced by adjusting the set span value and the second set quantity. It should be noted that the adjustment of the set span value and the second set quantity can cooperate with each other to reduce the optimization requirement; such as reducing the set span value or reducing the second set quantity; or increasing the second set quantity when reducing the set span value; or increasing the set span value when reducing the second set quantity.

[0061] The present invention also provides a system for optimizing ink dot modulation values ​​of inkjet printers using a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program is suitable for loading by a processor to execute the steps of the method for optimizing ink dot modulation values ​​of inkjet printers provided in an embodiment of the present invention.

[0062] The present invention has the following beneficial effects: providing a method for optimizing the ink dot modulation value of an inkjet printer; incrementally setting the ink dot modulation value of the inkjet printer based on a set span value; performing threshold optimization processing after each ink dot modulation value is set to generate an optimal detection threshold of the ink dot modulation value to accurately detect the phase angle, thereby providing more reference data for subsequent steps and improving the detection accuracy; performing phase optimization processing after each optimal detection threshold is generated to obtain the optimal phase of the ink dot modulation value to prepare for modulation value trend analysis; performing modulation value trend analysis after each optimal phase is generated, and confirming the optimal modulation value of the inkjet printer based on the analysis result; implementing the present invention can efficiently find the optimal modulation value of the inkjet printer, and the obtained optimal modulation value has the advantages of high accuracy and a wide deviation range, and can effectively improve the stability and reliability of the inkjet printer.

[0063] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0064] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0065] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0066] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A method for optimizing inkjet printer ink dot modulation value, characterized in that: The following steps are involved: S1, incrementally setting the ink dot modulation value of the inkjet printer based on the set span value; S2, after setting the ink dot modulation value each time, performing threshold optimization processing to generate an optimal detection threshold value for the ink dot modulation value; S3, after generating the optimal detection threshold each time, performing phase optimization processing to obtain the optimal phase of the ink dot modulation value; S4, after generating the optimal phase each time, performing a modulation value trend analysis, and confirming the optimal modulation value of the inkjet printer according to the analysis result, or returning to S1; In S2, the threshold optimization process includes: not repeatedly adjusting the detection threshold in the phase detection process, and performing phase detection process to obtain a digital signal after each adjustment of the detection threshold; if the digital signal meets the set requirements, the detection threshold set at this time is recorded as the optimal detection threshold of the ink dot modulation value, and the ink dot modulation value is calibrated as an available ink dot modulation value; if the digital signal that meets the set requirements cannot be obtained by adjusting the detection threshold, the ink dot modulation value is calibrated as an unusable ink dot modulation value; wherein, the phase detection process includes: generating a number of charging instructions with different phases, so that the ink dots are charged with the ink dot modulation values ​​with different phases; and collecting the digital signal output by the phase acquisition circuit in the inkjet printer; The S2 further includes: determining whether the absolute value of the difference between the high level and the low level in the digital signal is less than a first set number, if so, determining that the digital signal meets the set requirement, otherwise determining that the digital signal does not meet the set requirement; In S3, the phase optimization process includes: setting the detection threshold to the optimal detection threshold, performing the phase detection process, and in the phase detection process, collecting the charge amount of the ink dot after charging at different phases, and taking the phase corresponding to the maximum of each of the charge amounts as the optimal phase of the available ink dot modulation value; The S4 includes: S41, determining whether the available ink dot modulation values ​​corresponding to the latest phase set are continuously increased based on the set span value, and if so, executing S42, otherwise returning to S1; wherein the latest phase set includes the second set number of the best phases obtained most recently; S42, judging whether the latest phase set conforms to the set trend, if so, taking the middle value of each available ink dot modulation value corresponding to the latest phase set as the optimal modulation value, otherwise returning to S1.

2. The method for optimizing inkjet printer ink dot modulation value according to claim 1, characterized in that: In S42, judging whether the latest phase set conforms to a set trend includes: Performing curve fitting based on the latest phase set and the corresponding optimal modulation values ​​to obtain a trend curve; the horizontal axis parameter of the trend curve is the available ink dot modulation value, and the vertical axis parameter of the trend curve is the optimal phase; If the trend curve shows a trend of decreasing first and then increasing, and the available ink dot modulation value corresponding to the minimum value of the ordinate of the trend curve is located in the middle area of ​​the abscissa axis of the trend curve, it is determined that the latest phase set meets the set trend.

3. The inkjet printer ink dot modulation value optimization method according to claim 1, characterized in that: In the step S4, the second set number is set to 9 by default.

4. The method for optimizing ink dot modulation value of inkjet printer according to any one of claims 1 to 3, characterized in that: The S1 further comprises: If the ink dot modulation value after setting is greater than the modulation upper limit value, the set span value and / or the second set number are adjusted, and the ink dot modulation value is set to the modulation lower limit value before executing S2.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the steps of the method for optimizing ink dot modulation values ​​of a printer as described in any one of claims 1 to 4.

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