Printing control method and device, laser printing equipment and storage medium

Abstract

The invention discloses a printing control method and device, laser printing equipment and a storage medium, and relates to the technical field of image printing. The method comprises the steps that when to-be-printed paper is detected through a paper detection assembly, current data of the laser printing equipment are detected in real time after a first duration; if the change trend of the current data meets the preset current standard, it is determined that the to-be-printed paper reaches a working area of a transfer printing roller of the laser printing equipment; before the transfer printing roller performs transfer printing operation on the to-be-printed paper, the transfer printing current of the transfer printing roller is adjusted to a target current value by adjusting the transfer printing voltage of the transfer printing roller; and controlling the transfer printing roller to perform transfer printing operation on the to-be-printed paper. According to the technical scheme, it can be accurately and timely recognized that the paper reaches the working area of the transfer printing roller, and the stability and reliability of the transfer printing process are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of image printing technology, and in particular to a printing control method, device, laser printing equipment and storage medium. Background Art

[0002] In laser printers, the transfer current (applied to the transfer roller) is a key factor affecting the printing quality. If it is not properly controlled, it will cause problems such as ghosting and low transfer rate. If there is already a pattern on the paper (that is, there is toner on the paper), the toner will affect the transfer current when adjusting it, resulting in the adjusted transfer current not being the ideal current. Therefore, the transfer current must be adjusted to the target current value before the transfer roller transfers the body of the page to be printed.

[0003] Usually, the upper and lower margins of a paper page are 3 to 5 mm. Assuming that the paper feed speed is 176 mm / s, there is only 28 ms at most for adjusting the transfer current. In the prior art, a paper detection component is set upstream of the transfer roller, and the time when the front edge of the paper reaches the transfer roller is calculated based on the distance between the paper detection component and the transfer roller and the speed at which the paper travels. However, the printer structure is prone to errors, and there may be speed errors or even slippage before the paper enters the transfer roller. Therefore, the calculated time when the front edge of the paper reaches the transfer roller may deviate from the actual time when the front edge of the paper reaches the transfer roller. When the transfer current begins to be adjusted, the front edge of the paper may have arrived in advance or the front edge of the paper may not have reached the transfer roller at all. Since the existing method cannot accurately and timely identify whether the paper has reached the transfer roller, it may cause the transfer current to be adjusted too early or not in time, thereby affecting the effect of the transfer operation. Summary of the invention

[0004] The present application provides a printing control method, device, laser printing equipment and storage medium, which can more accurately and timely identify the arrival of paper at the working area of ​​the transfer roller to improve the stability and reliability of the transfer process.

[0005] In a first aspect, the present application provides a printing control method, which is applied to a laser printing device, wherein the laser printing device is provided with a paper detection component, and the method comprises:

[0006] When the paper to be printed is detected by the paper detection component, the current data of the laser printing device is detected in real time after a first time period;

[0007] If the change trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device;

[0008] Before the transfer roller performs a transfer operation on the paper to be printed, adjusting the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller;

[0009] The transfer roller is controlled to perform a transfer operation on the paper to be printed.

[0010] Furthermore, the first duration is determined in the following manner, including: obtaining a first distance between the paper detection component and the transfer roller, and obtaining a running speed of the paper to be printed; taking a value that is a preset distance less than the first distance as an estimated distance at which the paper to be printed is about to reach the working area of ​​the transfer roller; and dividing the estimated distance by the running speed to obtain the first duration.

[0011] Furthermore, if the changing trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device, including: recording the first current value detected for the first time; if a second current value is detected that differs from the first current value by more than a preset difference, it is determined that the paper to be printed has reached the working area of ​​the transfer roller.

[0012] Furthermore, before adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller, it also includes: determining whether the change trend of the current data tends to be stable; if it tends to be stable, performing the operation of adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller.

[0013] Furthermore, the transfer current of the transfer roller is adjusted to a target current value by adjusting the transfer voltage of the transfer roller, including: adjusting the transfer voltage to the target voltage value; determining the current transfer current of the transfer roller when the change trend of the transfer voltage tends to be stable; adjusting the transfer voltage based on the difference between the current transfer current and the target current value; repeatedly performing the operation of determining the current transfer current of the transfer roller when the change trend of the transfer voltage tends to be stable until the current transfer current reaches the target current value.

[0014] Further, adjusting the transfer voltage to a target voltage value includes: determining a voltage adjustment interval of the transfer voltage, the voltage adjustment interval including a maximum voltage value and a target voltage value, the voltage adjustment interval including a sub-voltage interval corresponding to the target voltage value; applying voltage to the transfer roller using the maximum voltage value for a second time period, so that the transfer voltage is increased to the sub-voltage interval after the second time period; applying voltage to the transfer roller using the target voltage value, so that the transfer voltage is stabilized to the target voltage value.

[0015] Furthermore, the maximum voltage value is greater than the target voltage value, and the second time duration is the time duration measured by experiments for applying voltage to the transfer roller using the maximum voltage value so that the transfer voltage increases to the target voltage value.

[0016] In a second aspect, the present application provides a printing control device, which is applied to a laser printing device, wherein the laser printing device is provided with a paper detection component, and the device comprises:

[0017] A data acquisition module, for detecting the current data of the laser printing device in real time after a first time period when the paper to be printed is detected by the paper detection component;

[0018] A data judgment module, used for determining that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device if the change trend of the current data meets the preset current standard;

[0019] a current regulating module, used for regulating the transfer current of the transfer roller to a target current value by regulating the transfer voltage of the transfer roller before the transfer roller performs a transfer operation on the paper to be printed;

[0020] The transfer execution module is used to control the transfer roller to perform a transfer operation on the paper to be printed.

[0021] In a third aspect, the present application provides a laser printing device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the printing control method described in any embodiment of the present application.

[0022] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the printing control method described in any embodiment of the present application when executed.

[0023] In a fifth aspect, the present application provides a computer program product, including a computer program, which implements the printing control method described in any embodiment of the present application when executed by a processor.

[0024] In order to solve the defects of the prior art in the background technology, the embodiment of the present application provides a printing control method, and the execution of the method can bring the following beneficial effects: after the paper detection component detects the paper, the current data is detected after a first period of time, and the change trend of the current data is used to determine whether the paper has reached the working area of ​​the transfer roller; compared with the simple mechanical position detection, it is more intelligent and accurate, and can avoid the detection error caused by the wear of mechanical parts or the abnormality of the paper (such as curling and wrinkling), and can accurately and timely identify the arrival of the paper in the working area of ​​the transfer roller, thereby improving the automation and reliability of the entire printing process, ensuring that the subsequent transfer operation is started when the paper is accurately in place, and reducing problems such as paper jams and printing misalignment. In addition, after determining that the paper has reached the transfer roller area, the transfer voltage of the transfer roller is adjusted to adjust the transfer current to the target current value, and the transfer roller is controlled to perform the transfer operation; through this voltage and current adjustment mechanism, the transfer roller can be ensured to be in the best working state before the transfer operation, ensuring the stability and reliability of the transfer process, and avoiding printing defects such as image blur, uneven color or missing text caused by unstable transfer current.

[0025] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium, wherein the computer-readable storage medium may be packaged together with the processor of the print control device, or may be packaged separately from the processor of the print control device, which is not limited in this application.

[0026] The description of the second, third, ..., and fifth aspects in this application can refer to the detailed description of the first aspect; and the beneficial effects of the description of the second, third, ..., and fifth aspects can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

[0027] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description.

[0028] It is understandable that before using the technical solutions disclosed in the embodiments of this application, the type, scope of use, and usage scenarios of the personal information involved in this application should be informed to the user and the user's authorization should be obtained in an appropriate manner in accordance with relevant laws and regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A first flow chart of a printing control method provided in an embodiment of the present application;

[0031] Figure 2 A simplified schematic diagram of the internal structure of the laser printing device provided in an embodiment of the present application;

[0032] Figure 3 A second flow chart of a printing control method provided in an embodiment of the present application;

[0033] Figure 4 The voltage variation curves of 10V and 5V respectively applied to the transfer roller provided in the embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a printing control device provided in an embodiment of the present application;

[0035] Figure 6 It is a block diagram of a laser printing device used to implement a printing control method of an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first", "second", "target", and "original" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including", "having", and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0038] Before introducing the embodiments of the present application, the working principle of the laser printing device is briefly introduced. The working principle of the laser printing device is to combine laser scanning technology and electronic imaging technology, and the specific work includes data exchange stage, laser scanning stage and electronic imaging development stage.

[0039] Specifically, the data exchange stage is as follows: when the user sends a print command to the printer through the computer operating system, the image and text information to be printed is first converted into binary information through the printer driver and finally transmitted to the main control board. Specifically, the laser scanning stage is as follows: the main control board receives and interprets the binary information sent by the driver, and then adjusts it to the laser beam, and controls the laser part to emit light according to this information. At the same time, the surface of the photosensitive drum is charged by the charging device, and then the laser scanning part generates a laser beam with image and text information to expose the photosensitive drum, and after exposure, an electrostatic latent image is formed on the surface of the drum. The electronic imaging development stage includes development, transfer and fixing, specifically: after the drum contacts the development system, the latent image becomes a visible image and text, and when passing through the transfer system, the toner is immediately transferred to the paper under the action of the electric field of the transfer device. After the transfer is completed, the paper contacts the de-electrical sawtooth to discharge the charge carried by the paper to the ground. Finally, it enters the fixing system that generates high temperature, and the image and text formed by the toner are integrated into the paper. After printing the image and text information, the cleaning device removes the toner that has not been transferred away, and then enters the next working cycle. The present application is an improvement on the transfer operation process.

[0040] Figure 1 The first flow chart of a printing control method provided in an embodiment of the present application is applicable to a scenario in which a laser printer performs a transfer operation on a paper to be printed. The printing control method provided in this embodiment can be executed by a printing control device provided in an embodiment of the present application, which can be implemented by software and / or hardware and integrated in an electronic device that executes the method. Preferably, the electronic device in the embodiment of the present application can be a laser printing device.

[0041] See also Figure 1 The method of this embodiment includes but is not limited to the following steps:

[0042] S110 , when the paper to be printed is detected by the paper detection component, the current data of the laser printing device is detected in real time after a first period of time.

[0043] Among them, the laser printing device is equipped with a paper detection component, which can be a paper detection sensor, which is used to sense whether there is paper in the laser printing device and determine whether the paper to be printed has moved to a preset position. The current data of the laser printing device in this step can be the total current of the entire laser printing device, or the current on the toner drum or the transfer roller. Preferably, the current data is the current on the transfer roller; it should be explained that this current data is a lower current applied to the transfer roller before performing the transfer operation, which is used to release static electricity that may accumulate on the surface of the toner drum and the transfer roller to prevent static electricity and charge accumulation. Different from the purpose of the transfer current of the transfer roller in the subsequent step S130, the transfer current is used to perform the transfer operation.

[0044] In the embodiment of the present application, when the laser printer is working in the electronic imaging development stage, the paper to be printed is detected by the paper detection sensor. When the paper detection component detects the paper to be printed, it is determined that the front edge of the paper has moved to the position corresponding to the paper detection sensor. The laser printing device is also equipped with a toner cartridge and a transfer roller. Figure 2 Shown is a simplified schematic diagram of the internal structure of a laser printing device. Figure 2 The reference symbol S in the figure indicates that the distance between the paper detection sensor and the transfer roller is the first distance. The existing method usually calculates the theoretical time T for the paper to reach the transfer roller based on the distance between the paper detection sensor and the transfer roller (i.e., the first distance S) and the theoretical running speed V of the paper. When the paper detection sensor detects the front edge of the paper, it is delayed by T, that is, it is determined that the front edge of the paper reaches the working area of ​​the transfer roller. However, due to the error of the printer structure, the calculated theoretical time for the paper to reach the transfer roller may deviate from the actual arrival time.

[0045] The embodiment of the present application detects the current data in real time, and then determines whether the paper has reached the working area of ​​the transfer roller according to the change trend of the current data. The advantage of such a setting is that it can avoid the problem of being unable to accurately and timely identify whether the paper has reached the working area of ​​the transfer roller due to the possible speed error or even slippage of the paper before it enters the working area of ​​the transfer roller. In principle, when the voltage of the device remains unchanged, the resistance changes, and the current will also change. In this embodiment, when the paper to be printed reaches the working area of ​​the transfer roller, the voltage will not change at this time, but the resistance will change, so the current will change. Then, this current change can be used to accurately identify that the paper has reached the working area of ​​the transfer roller, thus solving the problem of being unable to accurately and timely identify whether the paper has reached the working area of ​​the transfer roller due to the error in the structure of the printing device. Therefore, it is necessary to record the time point corresponding to the paper to be printed detected by the paper detection component, and at this time point after the first time length, the current data of the laser printing device is detected in real time, so as to judge whether the paper has moved to the working area of ​​the transfer roller based on the change trend of the current data.

[0046] In this application, after the paper detection component detects the paper, the printer does not immediately detect the current data, but detects the current data when the front edge of the paper reaches a predetermined position between the paper detection component and the transfer working area (such as Figure 2Detection starts when the leading edge of the paper reaches the working area of ​​the transfer roller (marked a in the figure). There is a delay time in between, which is called the "first duration". This is because before the leading edge of the paper reaches the working area of ​​the transfer roller, the current data on the transfer roller is basically constant. If the current detection starts after the paper detection component detects the paper, it will cause a waste of resources. On the other hand, due to the structural error of the printer, the leading edge of the paper reaches the working area of ​​the transfer roller in advance, so the current detection starts before the leading edge of the paper theoretically reaches the working area of ​​the transfer roller. The first duration can be a default value set by the program inside the printer, or it can be manually set by technical support personnel according to actual application conditions.

[0047] Preferably, the first time duration is determined by the following method, including: obtaining a first distance between the paper detection component and the transfer roller (ie Figure 2 The reference symbol S in the figure) is used to obtain the theoretical running speed of the paper to be printed; a value smaller than the first distance by a preset distance (ie Figure 2 The reference symbol D) in the figure is used as the estimated distance at which the paper to be printed is about to reach the working area of ​​the transfer roller (ie, the estimated distance is equal to SD); the estimated distance is divided by the running speed to obtain the first duration.

[0048] S120: If the change trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device.

[0049] Specifically, if the change trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the transfer roller working area of ​​the laser printing device, including: detecting the current data of the laser printing device in real time through the current acquisition component, recording the current value detected for the first time (recorded as the first current value), and storing it in a dedicated cache register. As time goes by and the paper continues to be transmitted, the detection system continues to perform high-frequency sampling of the current. If a second current value is detected that differs from the first current value by a greater than preset difference (preferably, the second current value that differs from the first current value by a greater than preset difference is detected for a certain period of time), it is determined that the paper to be printed has reached the transfer roller working area.

[0050] Among them, the first current value represents a reference current parameter of the transfer roller in the current working state when the paper has not reached the working area of ​​the transfer roller, wherein the current working state is that the transfer roller is in a working state to prevent static electricity and charge accumulation, for example: a lower current is applied to the transfer roller before performing the transfer operation, which is used to release static electricity that may accumulate on the surface of the toner drum and the transfer roller to prevent static electricity and charge accumulation; the current distribution of the transfer roller is in a reference initial state.

[0051] The preset difference value can be an accurate value obtained through a large number of experimental tests and theoretical calculations. It comprehensively considers the influence of various physical changes caused by the paper reaching the working area of ​​the transfer roller on the current. For example, when the paper runs between the transfer roller and the toner drum, the impedance between the transfer roller and the toner drum changes, which in turn causes the current to change.

[0052] Preferably, in order to ensure the accuracy and stability of the detection and prevent misjudgment due to instantaneous noise or other interference factors of the current, the detection system can also be equipped with filtering and anti-interference algorithms. When judging that the change trend of the current data meets the preset current standard, the collected current data will first be digitally filtered to remove interference components such as high-frequency noise and low-frequency fluctuations, and then a numerical judgment will be made.

[0053] S130 , before the transfer roller performs a transfer operation on the paper to be printed, adjusting the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller.

[0054] In an embodiment of the present application, when the paper to be printed reaches the transfer roller working area of ​​the laser printing device, the main control board of the laser printer receives a signal from the paper position detection sensor, which indicates that the paper has reached the transfer roller working area, and then starts to trigger the transfer preparation program, that is, by adjusting the transfer voltage of the transfer roller to adjust the transfer current of the transfer roller to the target current value.

[0055] The main control board retrieves the pre-set transfer current and transfer voltage parameter table from the built-in storage chip. The main control board sends a control instruction to the voltage regulation circuit of the transfer roller to indicate that it can drive the transfer roller to reach the required working voltage range. While adjusting the voltage, the current feedback loop of the transfer roller also collects the actual current value of the transfer roller in real time. The main control board constantly compares the actual current value collected with the target current value, and uses the proportional integral differential (PID) control algorithm to calculate the correction amount for the next voltage adjustment based on the difference between the two. During the entire adjustment process, the main control board will repeat the above voltage adjustment and current feedback steps at a very high frequency (for example, several adjustments per millisecond) until the transfer current of the transfer roller is stable within the allowable error range of the target current value. Through this voltage and current regulation mechanism, the laser printer can ensure that the transfer roller is in the best working state before the transfer operation, provide technical guarantee for high-quality print output, and avoid printing defects such as blurred images, uneven colors or missing text caused by unstable transfer current.

[0056] The parameter table may be generated by conducting a large number of experimental tests and data fitting on the printer under different paper types, print quality settings and environmental conditions, providing the most optimized transfer voltage and current combination for each printing scenario to ensure clear and accurate image transfer effects.

[0057] Furthermore, before adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller, it also includes: using a sliding window averaging method to calculate the average value of the current data within a time period (such as the past few milliseconds), and comparing it with the average values ​​of multiple previous time periods to determine whether the changing trend of the current data tends to be stable; if it tends to be stable, executing the operation of adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller, that is, starting the adjustment operation of the transfer current of the transfer roller.

[0058] S140, controlling the transfer roller to perform a transfer operation on the paper to be printed.

[0059] In the embodiment of the present application, during the laser printing process, the main control board first sends a precise signal to the transfer roller drive circuit to start the motor to rotate at a constant speed. At the same time, the high-voltage power supply circuit is activated to provide a stable high-voltage electric field for the transfer roller, control the transfer roller to transfer the toner to the paper to be printed, and complete the transfer operation on the paper to be printed.

[0060] The technical solution provided by this embodiment is that when the paper to be printed is detected by the paper detection component, the current data of the laser printing device is detected in real time after a first period of time; if the change trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device; before the transfer roller performs the transfer operation on the paper to be printed, the transfer current of the transfer roller is adjusted to the target current value by adjusting the transfer voltage of the transfer roller; and the transfer roller is controlled to perform the transfer operation on the paper to be printed. After the paper detection component detects the paper, the current data is detected again after a first period of time, and it is determined whether the paper has reached the working area of ​​the transfer roller according to the change trend of the current data; compared with simple mechanical position detection, it is more intelligent and accurate, and can avoid detection errors caused by wear of mechanical parts or abnormalities of paper (such as curling and wrinkling), and can accurately and timely identify that the paper has reached the working area of ​​the transfer roller, thereby improving the automation and reliability of the entire printing process, ensuring that the subsequent transfer operation is started when the paper is accurately in place, and reducing problems such as paper jams and printing misalignment. Furthermore, after determining that the paper has reached the transfer roller area, the present application adjusts the transfer voltage of the transfer roller so that the transfer current is adjusted to the target current value, and controls the transfer roller to perform the transfer operation; through this voltage and current adjustment mechanism, it is possible to ensure that the transfer roller is in the best working state before the transfer operation, thereby ensuring the stability and reliability of the transfer process and avoiding printing defects such as blurred images, uneven colors or missing text caused by unstable transfer current.

[0061] The following further describes the printing control method provided by the embodiment of the present application. Figure 3 The second flow chart of a printing control method provided in the embodiment of the present application is as follows: The embodiment of the present application is optimized on the basis of the above embodiments, and the specific optimization is as follows: The embodiment explains in detail the specific process of adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller.

[0062] See also Figure 3 The method of this embodiment includes but is not limited to the following steps:

[0063] S210: Determine a voltage adjustment range of the transfer voltage.

[0064] The voltage regulation interval includes a maximum voltage value and a target voltage value, the maximum voltage value is greater than the target voltage value, and the voltage regulation interval includes a sub-voltage interval corresponding to the target voltage value.

[0065] In the embodiment of the present application, after the front edge of the paper to be printed reaches the working area of ​​the transfer roller, the transfer current begins to be adjusted; before the transfer roller transfers the body of the page of the paper to be printed, the transfer current needs to be adjusted to the target current value. The distance between the front edge of the paper to be printed and the body of the page (i.e., the upper and lower margins of the paper) is 3 to 5 mm. Assuming that the paper feed speed is 176 mm / s, there is only 28 ms at most for adjusting the transfer current, that is, the transfer current needs to be adjusted to the target current value within 28 ms.

[0066] However, in the entire system of the laser printing device, the current and voltage are not linearly related. The transfer current is adjusted by adjusting the transfer voltage. Therefore, in order to adjust the transfer current to the target current value, the voltage adjustment range of the transfer voltage needs to be determined first. In addition, it takes a certain amount of time for the high voltage to stabilize, so the number of adjustments is limited, and multiple approximate adjustments are required to reach the target current value. If the number of adjustments is too small, there is often a certain gap from the target current value.

[0067] In this embodiment, the time for applying voltage to the transfer roller to the target voltage value can be shortened, so that the saved time can be used to adjust the transfer voltage slightly, so that the transfer current is adjusted to the target current value, which can increase the number of times the transfer current is adjusted. Figure 4 The following are the curves of voltage changes when 10V and 5V are applied to the transfer roller. It can be seen from the figure that voltage regulation can be roughly divided into the voltage step-up stage and the voltage stabilization stage. It can be seen from the curve that when the voltage is adjusted to a higher voltage, the voltage rise trend is faster. Therefore, when the target voltage value is 5V, you can first adjust it with 10V as the assumed target voltage, and then switch back to the target voltage value of 5V after a period of time (such as 1ms), so that the time to apply the voltage to the transfer roller to the target voltage value can be shortened.

[0068] The process of determining the voltage adjustment range can be: the main control board retrieves the preset transfer current and transfer voltage parameter table from the built-in storage chip. Based on this parameter table, the target voltage value corresponding to the target current value is searched, and then the preset multiple (such as 2 times) of the target voltage value is used as the maximum voltage value. Taking into account the structural error of each laser printer or the actual application scenario, a voltage value slightly smaller than the target voltage value is used as the minimum voltage value, and the voltage value interval composed of the minimum voltage value and the maximum voltage value is used as the voltage adjustment range.

[0069] S220 , applying voltage to the transfer roller for a second time period using a maximum voltage value, so that the transfer voltage is increased to a sub-voltage interval after the second time period.

[0070] The second time period is the time period measured through experiments for applying voltage to the transfer roller using the maximum voltage value so that the transfer voltage increases to the target voltage value.

[0071] In the embodiment of the present application, at the initial stage of voltage regulation, the maximum voltage value in the voltage regulation interval is first used to apply voltage to the transfer roller, and the voltage can be accurately increased by adjusting the internal step-up transformer turns ratio or changing the operating frequency of the switching power supply. This process lasts for a second time, and the purpose is to quickly increase the transfer voltage of the transfer roller to around the target voltage value, that is, the sub-voltage interval corresponding to the target voltage value.

[0072] S230 , applying a voltage to the transfer roller using the target voltage value, so that the transfer voltage is stabilized to the target voltage value.

[0073] In the embodiment of the present application, after the second time period, the voltage value applied to the transfer roller is modified to the target voltage value, and a voltage is applied to the transfer roller so that the transfer voltage is stabilized to the target voltage value.

[0074] S240: When the change trend of the transfer voltage tends to be stable, determine the current transfer current of the transfer roller.

[0075] In an embodiment of the present application, a sliding window averaging method can be used to calculate the average value of the transfer voltage within a time period (such as the past few milliseconds), and compare it with the average values ​​of previous multiple time periods to determine whether the change trend of the transfer voltage tends to be stable; if it tends to be stable, the current transfer current of the transfer roller is obtained through the current acquisition component.

[0076] S250 , adjusting the transfer voltage based on the difference between the current transfer current and the target current value.

[0077] In the embodiment of the present application, the main control board continuously compares the collected current transfer current with the target current value, and uses the PID control algorithm to calculate the correction amount for the next voltage adjustment based on the difference between the two.

[0078] S260, determining whether the current transfer current reaches the target current value; if not, repeating steps S240 to S250 until the current transfer current reaches the target current value.

[0079] S270: If the target current value is reached, the process ends.

[0080] The technical solution provided in this embodiment determines the voltage adjustment interval of the transfer voltage; applies voltage to the transfer roller using the maximum voltage value for a second time period, so that the transfer voltage is increased to the sub-voltage interval after the second time period; applies voltage to the transfer roller using the target voltage value, so that the transfer voltage stabilizes to the target voltage value; when the change trend of the transfer voltage tends to be stable, determines the current transfer current of the transfer roller; adjusts the transfer voltage based on the difference between the current transfer current and the target current value; and repeats the step of adjusting the transfer voltage until the current transfer current reaches the target current value. After determining that the paper has reached the transfer roller area, the application sets the voltage adjustment interval of the transfer voltage and applies voltage to the transfer roller using the maximum voltage value; this allows the transfer voltage of the transfer roller to quickly increase to around the target voltage value, which can increase the number of times the transfer current is adjusted. In addition, the transfer voltage of the transfer roller is adjusted so that the transfer current is adjusted to the target current value. Through this voltage and current adjustment mechanism, the transfer roller can be ensured to be in the best working state before the transfer operation, thereby ensuring the stability and reliability of the transfer process and avoiding printing defects such as blurred images, uneven colors or missing text caused by unstable transfer current.

[0081] Figure 5 A schematic diagram of the structure of a printing control device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the device 500 is applied to a laser printing device, wherein the laser printing device is provided with a paper detection component, which may include:

[0082] The data acquisition module 510 is used to detect the current data of the laser printing device in real time after a first time period when the paper to be printed is detected by the paper detection component;

[0083] A data judgment module 520, configured to determine that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device if the change trend of the current data meets a preset current standard;

[0084] The current regulating module 530 is used to adjust the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller before the transfer roller performs a transfer operation on the paper to be printed;

[0085] The transfer execution module 540 is used to control the transfer roller to perform a transfer operation on the paper to be printed.

[0086] Furthermore, the above-mentioned printing control device may further include: a duration determination module;

[0087] The duration determination module is used to obtain a first distance between the paper detection component and the transfer roller, and to obtain a running speed of the paper to be printed; a value that is a preset distance less than the first distance is used as an estimated distance at which the paper to be printed is about to reach the working area of ​​the transfer roller; and the estimated distance is divided by the running speed to obtain the first duration.

[0088] Furthermore, the data judgment module 520 can be specifically used to: record the first current value detected for the first time; if a second current value is detected that differs from the first current value by a greater than a preset difference, it is determined that the paper to be printed has reached the working area of ​​the transfer roller.

[0089] Furthermore, the above-mentioned current regulation module 530 can be specifically used to: determine whether the change trend of the current data tends to be stable before adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller; if it tends to be stable, perform the operation of adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller.

[0090] Furthermore, the above-mentioned current regulation module 530 can be specifically used to: adjust the transfer voltage to a target voltage value; determine the current transfer current of the transfer roller when the change trend of the transfer voltage tends to be stable; adjust the transfer voltage based on the difference between the current transfer current and the target current value; repeatedly perform the operation of determining the current transfer current of the transfer roller when the change trend of the transfer voltage tends to be stable until the current transfer current reaches the target current value.

[0091] Furthermore, the current regulating module 530 can be specifically used to: determine a voltage regulating interval of the transfer voltage, wherein the voltage regulating interval includes a maximum voltage value and a target voltage value, and the voltage regulating interval includes a sub-voltage interval corresponding to the target voltage value; apply voltage to the transfer roller using the maximum voltage value for a second time period, so that the transfer voltage is increased to the sub-voltage interval after the second time period; apply voltage to the transfer roller using the target voltage value, so that the transfer voltage is stabilized to the target voltage value

[0092] In one embodiment, the maximum voltage value is greater than the target voltage value, and the second time duration is the time duration measured by experiments for applying voltage to the transfer roller using the maximum voltage value so that the transfer voltage increases to the target voltage value.

[0093] The printing control device provided in this embodiment can be applied to the printing control method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0094] Figure 6 It is a block diagram of a laser printing device for implementing a printing control method of an embodiment of the present application. The laser printing device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The laser printing device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0095] like Figure 6 As shown, the laser printing device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the laser printing device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0096] A number of components in the laser printing device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the laser printing device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0097] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a printing control method.

[0098] In some embodiments, the printing control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the laser printing device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the printing control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the printing control method in any other appropriate manner (e.g., by means of firmware).

[0099] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0100] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions / operations specified in the flow charts and / or block diagrams are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0101] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0102] To provide interaction with a user, the systems and techniques described herein can be implemented on a laser printing device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the laser printing device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0103] The systems and techniques described herein can be implemented in a computing system that includes backend components (e.g., as a data server) or a computing system that includes middleware components (e.g., an application server) or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein) or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0104] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0105] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. For example, those skilled in the art can use the various forms of processes shown above to reorder, add, or delete steps; the steps recorded in the present application can be performed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of the present application can be achieved, and this document does not limit them here.

[0106] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A printing control method, characterized in that: Applied to a laser printing device, the laser printing device is equipped with a paper detection component, and the method includes: When the paper to be printed is detected by the paper detection component, the current data of the laser printing device is detected in real time after a first time period; If the change trend of the current data meets the preset current standard, it is determined that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device; Before the transfer roller performs a transfer operation on the paper to be printed, adjusting the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller; The transfer roller is controlled to perform a transfer operation on the paper to be printed.

2. The printing control method according to claim 1, characterized in that: The first duration is determined by the following method, including: Acquire a first distance between the paper detection component and the transfer roller, and acquire a running speed of the paper to be printed; Taking a value smaller than the first distance by a preset distance as an estimated distance that the to-be-printed paper is about to reach the working area of ​​the transfer roller; The estimated distance is divided by the running speed to obtain the first duration.

3. The printing control method according to claim 1, characterized in that: If the change trend of the current data meets the preset current standard, determining that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device includes: Recording a first current value detected for the first time; If a second current value is detected that differs from the first current value by a greater than a preset difference, it is determined that the paper to be printed has reached the working area of ​​the transfer roller.

4. The printing control method according to claim 1, characterized in that: Before adjusting the transfer current of the transfer roller to the target current value by adjusting the transfer voltage of the transfer roller, the method further includes: Determining whether the change trend of the current data tends to be stable; If the current is stable, an operation of adjusting the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller is performed.

5. The printing control method according to claim 1, characterized in that: The method further comprises: adjusting the transfer current of the transfer roller to a target current value by adjusting the transfer voltage of the transfer roller. adjusting the transfer voltage to a target voltage value; When the change trend of the transfer voltage tends to be stable, determining the current transfer current of the transfer roller; adjusting the transfer voltage based on a difference between the current transfer current and the target current value; The operation of determining the current transfer current of the transfer roller when the change trend of the transfer voltage tends to be stable is repeatedly performed until the current transfer current reaches the target current value.

6. The printing control method according to claim 5, characterized in that: Adjusting the transfer voltage to a target voltage value comprises: Determine a voltage adjustment interval of the transfer voltage, wherein the voltage adjustment interval includes a maximum voltage value and a target voltage value, and the voltage adjustment interval includes a sub-voltage interval corresponding to the target voltage value; applying a voltage to the transfer roller for a second time period using the maximum voltage value, so that the transfer voltage is increased to the sub-voltage interval after the second time period; A voltage is applied to the transfer roller using the target voltage value so that the transfer voltage is stabilized to the target voltage value.

7. The printing control method according to claim 6, characterized in that: The maximum voltage value is greater than the target voltage value, and the second time period is the time period measured through experiments for applying voltage to the transfer roller using the maximum voltage value so that the transfer voltage increases by the target voltage value.

8. A printing control device, characterized in that: Applied to a laser printing device, the laser printing device is equipped with a paper detection component, and the device comprises: A data acquisition module, for detecting the current data of the laser printing device in real time after a first time period when the paper to be printed is detected by the paper detection component; A data judgment module, used for determining that the paper to be printed has reached the working area of ​​the transfer roller of the laser printing device if the change trend of the current data meets the preset current standard; a current regulating module, used for regulating the transfer current of the transfer roller to a target current value by regulating the transfer voltage of the transfer roller before the transfer roller performs a transfer operation on the paper to be printed; The transfer execution module is used to control the transfer roller to perform a transfer operation on the paper to be printed.

9. A laser printing device, characterized in that: The laser printing device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores a computer program executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the printing control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the printing control method according to any one of claims 1 to 7 when executed.

Images