An optimized printing method for a thermal printer

Abstract

The application relates to the technical field of thermal printer printing algorithms, and provides an optimized printing method of a thermal printer, which comprises the following steps: obtaining printing content data through a printing preprocessing module, analyzing the number of points to be printed in the printing content, dividing the printing task into multiple grades according to the number of points, setting corresponding heating parameters according to the number of points in each grade in the multiple grades, judging the matching degree of the heating parameters and the optimal working parameter range of the printing head, starting a paper feeding operation by a paper feeding processing module and judging the completion of the printing task and the boundary of the current paper, controlling the paper feeding to the next line to continue printing when the task is not completed, controlling the paper feeding to the next page to continue printing when the boundary of the current paper is reached, and searching for the next gap by a printing post-processing module after detecting that the printing content is completely printed, and judging and processing the use state of consumables, so that the optimal combination among the printing effect, the printing speed and the service life of the printing head is realized.

Description

Technical Field

[0001] This invention relates to the technical fields of electronic digital data processing and thermal printer printing algorithms, and is applicable to thermal printers of any size. Specifically, it relates to an optimized printing method for thermal printers. Background Technology

[0002] A thermal printer is a device that outputs images or text using heating technology. It does not require traditional ink or toner, but utilizes the properties of thermal materials or ribbons to complete the printing process. There are two main types: direct thermal printers and thermal transfer printers. Compared to other types of printers, thermal printers are highly efficient, quiet, and portable, making them widely used in commercial, industrial, and medical fields. The printing algorithm is the core of a printer's operation; print quality, speed, and printer lifespan are all strongly correlated with the printing algorithm. Currently, most common printing algorithms achieve printing through simple control methods. While current thermal printing algorithms are widely adopted, they have significant drawbacks: they cannot perfectly balance the close relationship between printing speed, quality, and printhead lifespan. This leads to problems such as: high printing speed but poor print quality, for example, low density / color intensity resulting in unclear content; good print quality but slow printing speed, leading to long printing times and low efficiency when printing multiple sheets; and good printing speed and quality, but reduced printhead lifespan, accelerating printer wear and tear.

[0003] In summary, existing thermal printing algorithms suffer from the technical problem of failing to balance printing speed, quality, and printhead lifespan. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides an optimized printing method for a thermal printer that balances printing speed, quality, and printhead lifespan, achieving the best combination of these three factors to improve work quality and efficiency while reducing equipment wear and tear costs.

[0005] The optimized printing method for a thermal printer provided by the present invention includes:

[0006] The print preprocessing module acquires print content data, analyzes the number of dots to be printed in the print content, and divides the print task into multiple levels based on the number of dots, including N-level data, 2-level data, and 1-level data; N is a natural number greater than 2.

[0007] The heating module sets corresponding heating parameters based on the number of dots in each of the multiple levels. The heating parameters include the number of heating cycles, the number of dots heated each time, the heating method for each heating cycle, and the heating time for each heating cycle. It also determines whether the heating parameters meet the optimal operating parameter range of the printhead. If not, it continues to adjust and refine the heating parameters.

[0008] After completing the heating process of the current line of data, the paper feeding module starts the paper feeding operation. After each line of printed data, it checks whether the entire printing task has been completed. If not, it controls the paper to feed to the next line to continue printing and checks whether the current paper boundary has been reached. If so, it feeds the paper to the next page to continue printing. After detecting that all printed content has been printed, the post-printing processing module finds the next gap and judges and processes the usage status of consumables.

[0009] Compared with the prior art, the beneficial effects of this invention are as follows:

[0010] This invention provides an optimized printing method for a thermal printer. A pre-processing module acquires print content data, analyzes the number of dots to be printed, and divides the print job into multiple levels based on the number of dots. These levels include N-level data, 2-level data, and 1-level data; where N is a natural number greater than 2. A heating module sets corresponding heating parameters based on the number of dots in each level. These heating parameters include the number of heating cycles, the number of dots heated per cycle, the heating method for each cycle, and the heating time for each cycle. The module then determines whether these heating parameters meet the optimal operating parameter range of the print head; if not, it continues to adjust and refine the parameters. The heating parameters are divided into three parts. After the paper feed processing module completes the heating processing of the current line of data, it starts the paper feed operation. After each line of printed data, it checks whether the entire printing task has been completed. If not, it controls the paper feed to the next line to continue printing and checks whether the current paper boundary has been reached. If so, it feeds the paper to the next page to continue printing. After detecting that all printed content has been printed, the post-printing processing module finds the next gap and judges and processes the usage status of consumables. This balances printing speed, quality and printhead life, achieving the best combination of printing effect, printing speed and printhead life, improving work quality and efficiency, and reducing equipment wear and tear costs. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. Some specific embodiments of the invention will be described in detail below with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings designate the same or similar parts or components. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0012] Figure 1 This is a schematic flowchart of an optimized printing method for a thermal printer according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram illustrating the logical relationship between the printing preprocessing module, the heating processing module, the paper feeding processing module, and the printing postprocessing module in an embodiment of the present invention. Figure 2 In the middle, the dashed arrow indicates that a print job has been completed and the system has been reset to the beginning. Detailed Implementation

[0014] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0015] See Figures 1-2 This embodiment provides an optimized printing method for a thermal printer, including the following steps:

[0016] S101. The print preprocessing module acquires print content data, analyzes the number of dots to be printed in the print content, and divides the print task into multiple levels based on the number of dots, including N-level data, 2-level data, and 1-level data; N is a natural number greater than 2.

[0017] S102. The heating processing module sets corresponding heating parameters according to the number of dots in each of the multiple levels. The heating parameters include the number of heating times, the number of dots heated each time, the heating method for each heating, and the heating time for each heating. The module also determines whether the heating parameters meet the optimal working parameter range of the print head. If not, the module continues to adjust and refine the heating parameters.

[0018] S103. After completing the heating process of the current line of data, the paper feeding module starts the paper feeding operation and determines whether the entire printing task has been completed after each line of printed data. If not, it controls the paper to feed to the next line to continue printing and determines whether the current paper boundary has been reached. If so, it feeds the paper to the next page to continue printing. After detecting that all printed content has been printed, the post-printing processing module finds the next gap and judges and processes the usage status of consumables.

[0019] It should be noted that in this embodiment, the printing task is divided into multiple levels (including N-level, 2-level, and 1-level) according to the number of dots to be printed, and the entire thermal printing process is completed collaboratively by the pre-processing module, the heating module, the paper feeding module, and the post-processing module. This setup aims to solve the problems of uneven print quality, overheating, or underheating that traditional thermal printers encounter when dealing with different print content densities (i.e., varying numbers of dots per line or area). By analyzing the number of dots to be printed beforehand, heating parameters can be determined and refined according to high, medium, and low densities, thereby minimizing defects such as blurred characters or unclear color blocks caused by uneven heating while ensuring printing speed. Since the heating parameters include multiple factors such as the number of heating cycles, the number of dots heated per cycle, the heating method, and the heating time, they can more precisely adapt to different dot densities, ensuring both clarity and balanced thermal load on the print head. The optimal operating parameter range for the print head refers to the safe range derived from a combination of multiple indicators, including the highest temperature, the fastest switching frequency, and the upper limit of thermal inertia that the print head can withstand during actual operation. In this embodiment, by requiring the heating parameters to be checked and readjusted, the entire printing process is ensured to remain in a controllable and stable working environment. Furthermore, by promptly initiating the paper feed operation and determining whether the paper boundary has been reached after a line is printed, overheating or high error rates near inappropriate line spacing or paper boundaries can be avoided, while simultaneously improving consumable usage efficiency. Therefore, the optimized printing method for thermal printers proposed in this embodiment addresses the technical challenge of ensuring high-quality printing and extending printhead life at different print densities from an overall architectural perspective. This balances printing speed, quality, and printhead life, achieving the optimal combination of printing effect, printing speed, and printhead life, improving work quality and efficiency, and reducing equipment wear and tear costs. Understandably, the post-printing processing module searches for the next gap and judges the usage status of the consumables. This means that after completing the current printing content, the printer automatically finds the next physical separation mark (i.e., the next gap) on the consumables and determines whether there is still a usable portion of the consumables, whether page turning or paper changing is required, etc. This ensures that the printer accurately knows its position when printing continuously or in pages, and issues an alarm or switches to new consumables in a timely manner when the consumables are exhausted, thereby improving the continuity and accuracy of printing.

[0020] In some preferred embodiments, after scanning the print content data, the print preprocessing module classifies the data according to a preset threshold based on the different numbers of dots in each line. It should be noted that after scanning the print content data, the print preprocessing module needs to classify the data based on the differences in the number of dots in each line and the preset threshold. This solves the problem that traditional thermal printing cannot flexibly adjust heating and paper feeding strategies when faced with significant differences in dot density between lines. In this embodiment, by using the dot count as a key indicator to classify the line data into several types, the system can more accurately allocate heating time or heating mode to different types of lines, thus preventing the insufficiency of either overheating or underheating when dealing with all content using a single fixed heating method. The preset threshold refers to a set of values ​​or ranges predetermined to classify the print content into different levels; for example, below a certain value is considered low density, and above a certain value is considered high density, so that energy can be allocated and heating power controlled in a targeted manner later. Through the classification process in this embodiment, the printer can balance speed, quality, and energy consumption, thereby improving the overall efficiency and accuracy of printing, and making the execution strategies of subsequent modules (such as the heat treatment module) more refined and controllable.

[0021] In some preferred embodiments, the data is categorized according to the number of dots in each line of content, based on a preset threshold. This includes: rows with a dot density greater than a high threshold are classified as N, rows with a medium dot density as 2, and rows with a low dot density as 1. Each data category corresponds to a different control strategy in the subsequent heating processing module to improve processing efficiency and accuracy. It should be noted that this embodiment further refines the specific method of categorizing according to the preset threshold: rows with a dot density greater than a high threshold are classified as N, rows with a medium dot density as 2, and rows with a low dot density as 1. This three-tier classification mechanism allows for more scientific segmentation of printing tasks and provides more targeted strategies for subsequent heating processing. N represents rows with extremely high dot density, often requiring a longer or more stable heating process to ensure complete color development; 2 corresponds to medium density, allowing for a heating mode between high and low density; and 1 represents scenarios with relatively few dots, typically requiring only a shorter, lighter heating process to reach the appropriate temperature. The advantage of this approach is that it balances the thermal load requirements on the printhead: using the same strategy for high-density lines as for low-density lines can easily lead to insufficient color development or unclear printing; conversely, using high-density heating parameters for low-density content would result in energy waste and excessive heat buildup, ultimately shortening the printhead's lifespan. By categorizing content into high, medium, and low densities during the pre-processing stage, the heating module can employ differentiated control strategies, avoiding the drawbacks of a one-size-fits-all approach and allowing the printer to maintain relatively consistent print quality and speed across different content densities.

[0022] In some preferred embodiments, after receiving N levels of data, the heating module calculates and generates preliminary heating parameters based on the number of dots, and sequentially determines whether the number of heating cycles, the number of dots heated each time, the heating method, and the heating duration meet the optimal working range of the printhead. If not, it continues to subdivide the number of dots and adjust the heating parameters until the optimal heating state is matched. It should be noted that this embodiment proposes a more comprehensive strategy for the heating parameter subdivision process after the heating module receives N levels of data. N levels of data represent a high-density number of dots greater than a high threshold. For thermal printheads, the required energy distribution and heating time must be significantly increased at this point. If the heating time or heating method is inappropriate, it may lead to overheating of the printhead or failure to cool down in time, or even a significant reduction in the lifespan of the printhead. This embodiment emphasizes that the number of heating cycles, the number of dots heated each time, the heating method, and the heating duration must match the optimal working range of the printhead. If not, it continues to subdivide the number of dots and adjust the heating parameters, fundamentally avoiding excessive temperature rise caused by processing too many dots at once, and also preventing unclear printing results due to insufficient heating in some cases. By finer segmenting the number of dots and matching parameters step by step, thermal shock can be effectively reduced and print uniformity improved. For N-level data, this processing method allows for more precise management of the temperature profile, reducing heat buildup and lowering the risk of overheating or underheating, ultimately achieving high quality and high safety for high-density printing.

[0023] In some preferred embodiments, the heating method includes PWM controlled heating or constant heating. It should be noted that in this embodiment, the heating method can be selected from two switchable strategies: PWM controlled heating and constant heating, to adapt to different printing needs and print content densities. PWM controlled heating is a pulse width modulation-based heating method that controls heating power by rapidly switching the power supply on and off and adjusting its duty cycle. Constant heating refers to continuously providing a constant heating power to the print head for a period of time. For scenarios with low or medium dot density, PWM can be used to more flexibly control heat input, ensuring the temperature required for color development while avoiding excessive energy consumption and thermal inertia. However, in high-density scenarios (especially N-level), PWM may not be able to provide sufficient and stable heat within a limited time. In this case, constant heating is preferred to achieve a sufficient temperature rise in a shorter time, ensuring print quality in high-density areas. This dual-mode heating strategy in this embodiment helps the thermal printer balance energy demands and overheating risks under different density scenarios, effectively solving the problem of uneven heating caused by diverse content, and also helps extend the overall lifespan of the print head.

[0024] In some preferred embodiments, the paper feeding module controls the paper to move to the next line after each line of data is printed. This movement is synchronized with the printhead heating completion signal. After printing the entire page, the module checks if the paper boundary has been reached. If so, it performs a page turn or prompts the user; otherwise, printing continues line by line. It's important to note that the paper feeding module synchronously initiates the paper feeding operation and checks the paper boundary after each line of data is printed, ensuring synchronized paper feeding and heating processes for precise positioning and material savings. In thermal printers, the printhead's heating of the paper needs to be precise. Mismatched paper feeding speed and distance can lead to ghosting or inaccurate line spacing. Linking the printhead heating completion signal with the paper feeding operation reduces positional shifts and continuous heating due to incomplete heat release. Checking the paper boundary after printing a full page effectively prevents large-area heating near the boundary, avoiding incomplete or wasteful printing. Turning pages or providing prompts when the paper is near the edge can improve automation and printing smoothness.

[0025] In some preferred embodiments, after all lines of data have been printed, the post-printing processing module performs page end detection and consumable detection on the print job. If consumables are found to be depleted, a consumable alarm signal is sent. Simultaneously, when new page consumables are available, the module automatically identifies the start position of the next page and resets all modules to their initial state for the next print job. It should be noted that after all lines have been printed, the post-printing processing module performs page end detection and consumable detection on the print job. If consumables are found to be depleted, an alarm signal is sent. When new page consumables are available, the module automatically identifies the start position and resets the workflow of each module, thereby ensuring the continuity and automation of the printing process and preventing unexpected print interruptions or waste of semi-finished products due to insufficient consumables. In this embodiment, the page end detection mechanism can quickly detect the completion status of the entire page print job and promptly prepare for the next page or new paper, eliminating the need for manual operation and greatly improving printing efficiency and user experience. The consumables detection mechanism avoids risks such as printhead idling or overheating when printing continues even when consumables are depleted, and promptly sends alarm messages to the user, thus protecting the equipment and reducing unnecessary energy consumption. The automatic search for the starting point of the next page ensures accuracy when printing new pages, avoiding misaligned lines or printing errors, making the printing process more continuous and maintainable. From a technical perspective, this solution significantly improves consumables usage efficiency and equipment safety.

[0026] In some preferred embodiments, the heating processing module automatically switches heating control strategies based on the dot-level input data. Low-density content uses PWM control to reduce heat load, while high-density content uses constant heating to ensure complete color development. The strategy switching logic is integrated into the heating processing module and the content density is automatically determined by a preset algorithm. It should be noted that low-density content uses PWM control, while high-density content uses constant heating, thus switching the power output mode based on real-time content recognition. When the number of dots is small, using constant heating not only wastes energy but also easily causes the printhead temperature to become excessively high in meaningless areas. Conversely, when the dot density is extremely high, if PWM is still used to provide heat, the intermittent output may prevent the achievement of rapid and sufficient color development, resulting in unclear printing or a decrease in speed. In this embodiment, by identifying the dot density of the current content (i.e., the number of thermal dots to be printed in the line data), energy can be saved and thermal shock reduced at low densities, while continuous, high-power heat supply can be ensured at high densities. It is understood that in this embodiment, the strategy switching logic is integrated into the heating processing module and the content density is automatically determined by a preset algorithm. It can make a judgment by combining the printing situation of the previous few lines with the actual number of dots in the current line, and quickly switch between PWM and constant heating, so as to obtain ideal results under different printing loads and avoid common problems such as overheating or insufficient color development caused by traditional single heating methods.

[0027] In some preferred embodiments, a thermal inertia compensation unit is configured. This unit monitors the current thermal state of the printhead in real time and dynamically adjusts the current heating cycle based on the cumulative heating time and the last cooling interval to avoid overheating damage to the printhead caused by continuous heating. It should be noted that thermal inertia refers to the characteristic that the printhead does not instantly cool down or heat up during the heating process, but rather experiences a slow temperature change. If this thermal inertia is ignored, heating may continue according to fixed parameters after large-area continuous printing, causing the printhead temperature to accumulate and rise, leading to overheating damage. In this embodiment, by adding a thermal inertia compensation unit, after obtaining the printhead temperature or related estimated data in real time, the subsequent heating duration, heating power, or PWM duty cycle can be adjusted to ensure the printhead receives sufficient cooling time or reduces the heating intensity, thereby keeping it within a safe operating range. This reduces the risk of temperature runaway during high-speed or continuous high-density printing, slows down the aging of the printhead, and extends the overall lifespan of the printing equipment.

[0028] In some preferred embodiments, the print preprocessing module and the heating processing module communicate via a data buffer. Print jobs are sent to the heating processing module in batches based on dot classification results, and the module returns a processing result after each heating cycle to determine if further parameter adjustments or paper feed module activation are needed. It should be noted that this embodiment specifies the communication method between the print preprocessing module and the heating processing module, namely, batch sending and result feedback via a data buffer to determine if further parameter adjustments or paper feed module activation are required. This aims to improve the data processing efficiency and coordination of the printer during high-speed, batch printing. After classifying the print content, the print preprocessing module can first place data of a certain level (such as high-density level) into the data buffer, waiting for the heating processing module to read and complete the heating process. After heating, the heating processing module sends a result or status information back to the preprocessing module to confirm whether overheating has occurred or if additional dot subdivision is needed. If the preprocessing module finds the heating effect to be good, it can continue sending the next batch of data; otherwise, it can dynamically adjust the heating parameters in real time. This embodiment, through its design with batch transmission and feedback mechanism, can greatly reduce the system burden caused by one-time transmission and processing when the print volume is large, and allows the heating parameters to be adjusted multiple times during the printing process, fundamentally improving the adaptability and accuracy of printing.

[0029] In some preferred embodiments, the paper feeding module includes paper feeding synchronization control logic. This logic determines whether a line of printing is complete based on the heating module signal and matches a preset paper feeding distance and speed to ensure paper stability and printing position accuracy during the paper feeding process. It should be noted that the paper feeding module includes paper feeding synchronization control logic, which determines whether a line of printing is complete based on the heating module signal and matches a preset paper feeding distance and speed. This solves the problem of potential asynchrony between the heating process and the paper feeding process during thermal printing, avoiding missed prints, duplicate prints, or uneven line spacing. The paper feeding synchronization control logic can initiate the paper feeding action only after detecting that all points in a line have been heated, and moves according to a preset paper feeding distance to ensure the print head accurately lands on the next line to be printed. During the paper feeding process, if temporary cooling is required due to printing speed or heat accumulation, the paper feeding synchronization control logic can also make real-time adjustments to prevent the paper from spinning idly or moving excessively under the print head. In addition, preset paper feed speed can keep the paper stable during movement, further reducing the risk of paper distortion due to friction or compression.

[0030] In some preferred embodiments, after detecting the page boundary, the post-printing processing module determines whether the end of the consumable has been reached by identifying the marker point at the consumable's position. If it has, all printing tasks are paused and an alarm message is output to the user. Simultaneously, after new consumable is loaded, it automatically finds the starting positioning point to resume the printing process. It should be noted that in this embodiment, determining whether the end of the consumable has been reached by identifying the marker point at the consumable's position, pausing printing and issuing an alarm if it has, and automatically repositioning if new consumable is available, solves the problem of difficulty in timely detection and processing when the paper reaches the end during long orders or batch printing, avoiding missing or chaotic print data. The marker point can be a pre-printed mark on the paper, or a common physical feature such as a black mark or perforation, which is used by photoelectric sensing or mechanical detection to determine when the paper is nearing the end. When new consumable is detected, automatically finding the starting positioning point allows for seamless connection to the previous printing task at the beginning of the new paper, improving continuity and efficiency.

[0031] In some preferred embodiments, the execution status of each processing module in the pre-processing module, heating module, paper feed module, and post-processing module is recorded in the device's internal log system. The log information in this system includes parameter settings, execution order, print content summary, heating cycle data, and paper feed travel for each print job, used for subsequent device maintenance or operational status review. It should be noted that in this embodiment, recording the execution status of the pre-processing module, heating module, paper feed module, and post-processing module in the device's internal log system and storing information such as parameter settings, execution order, print content summary, heating cycle data, and paper feed travel can meet the needs of subsequent device maintenance or operational status review. After prolonged and intensive use, thermal printers often require analysis of printhead wear, whether the heating mode is operating in an overload range, or whether there are errors in paper feed control. Without log support, it is difficult to accurately trace the cause of the malfunction. By maintaining detailed logs within the system, it provides data support for technicians to diagnose printhead or drive mechanism problems. Furthermore, in the event of special printing malfunctions, it allows for the reconstruction of the original operating procedures and parameter settings, providing a reference for improving algorithms or equipment hardware. Additionally, when printing results from different tasks are unsatisfactory, the corresponding log information can be retrieved for comparison to quickly pinpoint whether the issue stems from mismatched heating parameters or paper feed speed.

[0032] In some preferred embodiments, the optimized printing method of the thermal printer is adaptable to thermal printer devices of different specifications. The heating and paper feed parameters of the thermal printer device are initialized and configured by an algorithm based on the device model, its own performance indicators, and consumable type, and continuously optimized during the printing process based on real-time feedback to ensure consistent printing results across devices. It should be noted that different thermal printers have significant differences in printhead power, resolution, and mechanical paper feed structure. Relying on only one set of fixed parameters makes it difficult to guarantee consistent print quality across various devices. By setting the heating and paper feed parameters according to the device model and consumable type at the initial stage, it is possible to tailor the method to different devices, allowing them to fully utilize their performance under their respective hardware conditions. At the same time, as the printing task progresses, real-time feedback data further corrects the parameters, allowing the printer to maintain high-quality printing results under different ambient temperatures, humidity, or consumable changes.

[0033] In some preferred embodiments, the heating module records the cumulative heat load value of the printhead after each round of tasks and compares it with a preset printhead thermal lifespan model. If the heat load approaches a critical value, it automatically adjusts the heating parameters or inserts a cooling interval to reduce premature aging of the printhead due to continuous high heat. It should be noted that thermal printheads gradually age during frequent and high-intensity heating. Traditional printers often only replace the printhead passively when obvious malfunctions or unclear printing occur, lacking preventative management. In this embodiment, the potential lifespan of the printhead under various workloads is estimated in advance using a thermal lifespan model. Based on this, the current cumulative heat load is compared. Once the heat load is found to be approaching the estimated limit, timely measures can be taken, such as reducing heating power, increasing pause intervals, or reminding the printhead to be replaced. This prevents the printhead from failing due to overheating or fatigue under uncontrolled conditions, leading to serious print quality problems or hardware damage.

[0034] It should be noted that the above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention, and the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An optimal printing method of a thermal printer, characterized by, The application relates to a printing method and device. The printing pre-processing module acquires printing content data, analyzes the number of points to be printed in the printing content, divides the printing task into multiple grades according to the number of points, and the multiple grades include N-grade data, 2-grade data and 1-grade data; N is a natural number greater than 2; the printing pre-processing module divides and processes according to a preset threshold value according to the number of points in each line of printing content, and the division and processing specifically include: when the number of points is greater than the preset threshold value, the number of points is classified as N-grade; when the number of points is lower than the preset threshold value, the number of points is classified as 2-grade or 1-grade; The heating processing module sets corresponding heating parameters according to the number of points in each grade in the multiple grades, the heating parameters include the number of heating times, the number of points in each heating, the heating mode in each heating and the time of each heating, and whether the heating parameters meet the best working parameter range of the printing head is judged; if not, the heating parameters are continuously adjusted and subdivided; the best working parameter range of the printing head refers to the highest temperature and the upper limit of thermal inertia that can be borne by the printing head in actual work; the heating mode includes PWM control heating or constant heating; the 1-grade or 2-grade adopts PWM control heating to reduce the thermal load, and the N-grade adopts constant heating to ensure complete color development; The paper feeding processing module starts the paper feeding operation after the heating processing of the current line data is completed according to the heating parameters, and judges whether the whole printing task is completed after each line of content is printed; if not, the paper feeding is started to the next line according to the heating completion signal of the printing head, and whether the boundary of the paper is reached is judged after the whole page content is printed; after detecting that the whole printing content is printed, the printing post-processing module searches for the next physical separation mark, judges and processes the use state of the paper, including: after the current printing content is completed, the printer automatically searches for the next physical separation mark on the paper, and judges whether the current paper still has a usable part and whether the page turning or paper changing operation needs to be performed according to the next physical separation mark; The paper feeding processing module contains paper feeding synchronous control logic, which judges whether a line of printing is completed according to the heating signal, matches the preset paper feeding distance and paper feeding speed, and ensures the stability of the paper and the accuracy of the printing position in the paper feeding process; the heating processing module records the cumulative thermal load value of the printing head after each round of task is completed, and compares the cumulative thermal load value with a preset printing head thermal life model; if the cumulative thermal load value is close to the critical value, the heating parameters are automatically adjusted or a cooling interval is inserted to reduce the premature aging of the printing head caused by continuous high heat. A thermal inertia compensation unit is configured, which dynamically corrects the current heating period according to the cumulative heating time and the last cooling interval by monitoring the current thermal state of the printing head in real time, so as to avoid overheat damage to the printing head caused by continuous heating.

2. The optimization printing method of a thermal printer according to claim 1, characterized by, The printing pre-processing module and the heating processing module communicate through a data buffer, the printing task is sent to the heating processing module in batches according to the division result of the number of points, and the processing result is returned after each heating is completed to judge whether the heating parameters need to be further adjusted or the paper feeding is started.

3. The optimization printing method of a thermal printer according to claim 1, characterized by, ​

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