A printing platform vibration elimination method, system, device and storage medium

Abstract

The present application relates to the technical field of OLED inkjet printing, and particularly relates to a printing platform vibration elimination method, system, device and storage medium; according to a speed conversion formula, ADC resolution, ADC voltage sampling value, ADC input voltage range and a preset speed sensor constant are converted to obtain an ADC speed value; according to a displacement conversion formula, ADC resolution, ADC voltage sampling value, ADC input voltage range and a preset displacement sensor constant are converted to obtain an ADC displacement value; the ADC speed value and the ADC displacement value are operated to obtain a feedback compensation force; according to the feedback compensation force, a driving reaction force that eliminates vibration is output to the printing platform; by accurately collecting ADC parameters, high-precision speed values and displacement values are obtained through conversion, a feedback compensation force is generated to offset platform vibration, OLED inkjet printing drop point accuracy is improved, defects are reduced, process stability is ensured, and large-scale production of high-performance devices is supported.

Description

Technical Field

[0001] This invention relates to the field of OLED inkjet printing technology, specifically to a method, system, device, and storage medium for eliminating vibration on a printing platform. Background Technology

[0002] In the field of OLED inkjet printing, as substrate sizes (G1 to G8.6) and resolutions increase, the requirements for droplet placement accuracy and stage positioning accuracy during printing become increasingly stringent. Current technologies for vibration suppression in high-precision equipment such as OLED inkjet printers largely rely on passive damping structures (such as damping pads and elastic supports), lacking active feedback compensation mechanisms. This results in the inability to generate targeted feedback compensation forces, and the compensation logic lacks linkage with the equipment's motion state, only passively absorbing a portion of vibration energy. This is insufficient to offset the impact of high-frequency, instantaneous vibrations on accuracy, ultimately leading to deviations in key accuracy indicators such as droplet placement and stage positioning, failing to meet the stringent vibration suppression requirements of large-size, high-resolution substrate processing. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a method, system, device and storage medium for eliminating vibration of a printing platform.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a method for eliminating vibration on a printing platform, applicable to a printing platform vibration elimination system. The printing platform vibration elimination system includes a printing platform. The method for eliminating vibration on a printing platform includes: sampling an ADC input voltage range, ADC resolution, and ADC voltage sampling value according to a preset sampling period; converting the ADC resolution, ADC voltage sampling value, ADC input voltage range, and a preset speed sensor constant according to a speed conversion formula to obtain an ADC speed value; converting the ADC resolution, ADC voltage sampling value, ADC input voltage range, and a preset displacement sensor constant according to a displacement conversion formula to obtain an ADC displacement value; calculating the ADC speed value and ADC displacement value to obtain a feedback compensation force; and outputting a driving reaction force to the printing platform to eliminate vibration based on the feedback compensation force.

[0006] Furthermore, the step of calculating the ADC velocity value and ADC displacement value to obtain the feedback compensation force includes: calculating the ADC velocity value according to a preset velocity control function model to obtain the velocity feedback compensation force; calculating the ADC displacement value according to a preset displacement control function model to obtain the displacement feedback compensation force; and summing the velocity feedback compensation force and the displacement feedback compensation force to obtain the feedback compensation force.

[0007] Furthermore, the printing platform vibration elimination system also includes a motor. The step of outputting a vibration-eliminating driving reaction force to the printing platform based on the feedback compensation force includes: acquiring the printhead mass and printhead acceleration; calculating the feedback compensation force, printhead mass, and printhead acceleration to obtain a driving reaction force compensation value; converting the driving reaction force compensation value according to a preset actuator function formula to obtain a DAC output value; and controlling the motor to output a vibration-eliminating driving reaction force to the printing platform based on the DAC output value.

[0008] Furthermore, the calculation of the feedback compensation force, nozzle mass, and nozzle acceleration to obtain the driving reaction force compensation value includes: multiplying the nozzle mass and nozzle acceleration to obtain the feedforward compensation force; and summing the feedback compensation force and the feedforward compensation force to obtain the driving reaction force compensation value.

[0009] Furthermore, the step of converting the drive reaction force compensation value according to the preset actuator function formula to obtain the DAC output value includes: obtaining the motor driver amplification factor, the driver output force constant, and the DAC resolution under the current range; and converting the drive reaction force compensation value, the motor driver amplification factor, the driver output force constant, and the DAC resolution under the current range according to the actuator function formula to obtain the DAC output value.

[0010] Furthermore, the step of controlling the motor to output a vibration-eliminating driving force to the printing platform based on the DAC output value includes: entering a vibration elimination state based on the DAC output value; and in the vibration elimination state, controlling the motor to output a vibration-eliminating driving force to the printing platform based on the DAC output value.

[0011] Furthermore, the printing platform vibration elimination system also includes a logic processor. The step of sampling the ADC input voltage range, ADC resolution, and ADC voltage sampling value according to a preset sampling period includes: generating a transmission command according to the sampling period; and controlling the logic processor to sample the ADC input voltage range, ADC resolution, and ADC voltage sampling value according to the transmission command.

[0012] Furthermore, a printing platform vibration elimination system performs a printing platform vibration elimination method as described above, the printing platform vibration elimination system comprising a control device, a printing platform electrically connected to the control device, a logic processor, and a motor.

[0013] Furthermore, a printing platform vibration elimination device includes: a memory and at least one processor, the memory storing instructions; at least one processor invokes the instructions in the memory to cause the printing platform vibration elimination device to perform the steps of a printing platform vibration elimination method as described above.

[0014] Furthermore, a computer-readable storage medium stores instructions that, when executed by a processor, implement the steps of the droplet reflection signal intensity measurement method as described above.

[0015] In the technical solution of this invention, the ADC input voltage range, ADC resolution, and ADC voltage sampling values ​​are accurately collected based on the sampling period. High-precision ADC velocity and displacement values ​​are obtained through velocity conversion formulas and displacement conversion formulas. Then, a feedback compensation force is generated through calculation, which ultimately drives the output to eliminate vibration. This can accurately capture the velocity and displacement vibration deviations of the OLED inkjet printing platform, achieve efficient cancellation of vibration interference, improve the accuracy of ink droplet landing, reduce printing defects, and ensure the stability and consistency of the printing process, providing reliable technical support for the high-precision mass production of high-performance OLED display devices. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a first flowchart of a method for eliminating vibration on a printing platform according to an embodiment of the present invention;

[0018] Figure 2 This is a second flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0019] Figure 3 This is a third flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0020] Figure 4 This is a fourth flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0021] Figure 5 A fifth flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0022] Figure 6 The sixth flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0023] Figure 7A seventh flowchart of a method for eliminating vibration on a printing platform provided in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of a vibration elimination system for a printing platform provided in an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of a vibration elimination device for a printing platform provided in an embodiment of the present invention.

[0026] Figure Labels

[0027] 1-Control device; 2-Printing platform; 3-Logic processor; 4-Motor. Detailed Implementation

[0028] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] The main control chip, designed for the ZYNQ series, is divided into two parts: PS and PL. PS is an ARM core processor running the FreeRTOS embedded operating system, while PL is an FPGA logic processor. First, after power-on, PS completes operating system initialization, vibration cancellation setup, communication, and idle tasks. At the beginning of each sampling cycle, it sends a command to the PL to enable ADC data sampling. Second, it enters the task scheduler to wait for ready tasks. Third, upon receiving the command from PS, PL begins ADC data acquisition. After acquisition, it sends a falling edge interrupt to trigger PS to read the ADC data. Finally, after reading the ADC data, PS, under the scheduling of the task scheduler, enters the vibration cancellation task, calculates the feedback compensation force, and writes the value to the DAC chip via PL.

[0030] The tasks executed by the PS include vibration cancellation, communication, and idle tasks. Among these, vibration cancellation is the core task, ultimately calculating and writing the DAC data to the PL. The communication task is mainly responsible for data communication with the outside world, such as parameter setting and status display. Of the many tasks, vibration cancellation has the highest priority, ensuring timely processing of ADC sampling data and improving system real-time performance.

[0031] On the PL side, firstly, the PL acquires ADC data of velocity and displacement signals. After acquisition, it triggers the PS via an interrupt to read the ADC data. Secondly, the PL waits for the PS to write DAC data. Then, the written DAC data is sequentially set to each channel of the DAC chip. Finally, the ADC data of velocity and displacement signals is acquired again, and the above steps are repeated.

[0032] The dynamic characteristics of the OLED inkjet printing platform are analyzed. The printhead in the X direction and the stage in the Y direction exhibit various motion states, including stationary, uniform linear motion, accelerated linear motion, and decelerated linear motion. To reduce the vibration of the printing platform caused by the repeated movements of the printhead and stage in the X and Y directions, the elimination method involves sampling the interference force, calculating the compensation force, and applying the compensation force. A compensation force opposite to the interference force is output in both the X and Y directions to eliminate the vibration of the marble base. In this scheme, the output of a compensation force opposite to the interference force in the X direction to eliminate the vibration of the marble base is taken as an example; the same control principle applies to the Y direction.

[0033] A method for eliminating vibration of a printing platform is provided, applied to a printing platform vibration elimination system. The printing platform vibration elimination system includes a printing platform. For ease of understanding, the specific process of an embodiment of the invention is described below. Please refer to [link / reference]. Figure 1 One embodiment of a vibration elimination method for a printing platform according to the present invention includes:

[0034] 101. Obtain the ADC input voltage range, ADC resolution, and ADC voltage sampling values ​​according to the preset sampling period;

[0035] In this embodiment, For the current ADC sampled value, through The voltage sampling value can be calculated; the ADC input voltage range, resolution and sampling value are accurately acquired according to the sampling period, and the accurate voltage sampling value is obtained through conversion, providing a high-precision and high-reliability data source for subsequent calculation of velocity and displacement values;

[0036] 102. The ADC resolution, ADC voltage sampling value, ADC input voltage range and preset speed sensor constant are converted according to the speed conversion formula to obtain the ADC speed value;

[0037] In this embodiment, the speed conversion formula is as follows:

[0038]

[0039] In the formula, This represents the ADC speed value corresponding to the current sampling voltage. For the current ADC sampled value, through The ADC voltage sampling value can be calculated, where N is the ADC resolution. For the ADC input voltage range, As the speed sensor constant, based on the speed conversion formula, the ADC speed value is accurately calculated by integrating the ADC resolution, voltage sampling value, input voltage range and speed sensor constant. This provides high-precision data support for the calculation of speed feedback compensation force, improves the accuracy of speed detection, ensures vibration compensation effect, effectively counteracts vibration interference of the printing platform, and stabilizes the OLED inkjet printing process.

[0040] 103. The ADC resolution, ADC voltage sampling value, ADC input voltage range, and preset displacement sensor constant are converted according to the displacement conversion formula to obtain the ADC displacement value.

[0041] In this embodiment, the displacement conversion formula is as follows:

[0042]

[0043] In the formula, This represents the ADC displacement value corresponding to the current sampling voltage. As the displacement sensor constant, based on the displacement conversion formula, the ADC displacement value is accurately calculated by integrating the ADC resolution, voltage sampling value, input voltage range and displacement sensor constant. This provides reliable data support for the calculation of displacement feedback compensation force, improves displacement detection accuracy, ensures vibration compensation accuracy, effectively counteracts printing platform vibration interference, improves ink droplet landing accuracy, and stabilizes OLED inkjet printing process.

[0044] In this embodiment, by integrating ADC resolution, voltage sampling values, input voltage range, and corresponding speed sensor constants and displacement sensor constants through speed conversion formulas and displacement conversion formulas, the ADC speed value and ADC displacement value are accurately calculated. This provides high-precision and high-reliability data support for the subsequent calculation of speed feedback compensation force and displacement feedback compensation force, improves the motion state detection accuracy of the printing platform, ensures the accuracy of the subsequent vibration compensation mechanism, effectively counteracts the vibration interference generated by the movement of the OLED inkjet printing platform, improves the accuracy of ink droplet landing, reduces printing defects, strengthens the stability and consistency of the OLED inkjet printing process, and provides reliable technical support for the production of high-performance display devices.

[0045] 104. Calculate the ADC velocity and displacement values ​​to obtain the feedback compensation force;

[0046] In this embodiment, the ADC chip samples the x-axis and y-axis speed and displacement signals of the OLED inkjet printing platform to the main control chip. The main control chip performs controller function calculations (e.g., controller function and displacement controller function) based on the ADC sampled signals. Finally, the signal passes through the DA chip, motor drive circuit, and motor to output feedback compensation force. The main control chip can be, but is not limited to, ZYNQ series or STM32 series processing chips with floating-point arithmetic units. The ADC chip uses a high-resolution chip with a fast conversion speed to ensure that the system can obtain a faster control cycle. The DA chip needs to use a chip with the shortest possible setup time to meet the requirement of rapid output of control results. By accurately calculating the ADC speed and displacement values, a feedback compensation force adapted to the OLED inkjet printing platform is generated. This can comprehensively capture the speed and displacement vibration deviations of the platform movement, achieve accurate cancellation of vibration interference, improve the accuracy of ink droplet landing, reduce printing defects, and ensure the stability and reliability of the OLED inkjet printing process.

[0047] 105. Based on the feedback compensation force, output a driving reaction force to the printing platform to eliminate vibration;

[0048] In this embodiment, the ADC input voltage range, ADC resolution, and ADC voltage sampling values ​​are accurately acquired based on the sampling period. High-precision ADC velocity and displacement values ​​are obtained through velocity and displacement conversion formulas. Then, a feedback compensation force is generated through calculation, which ultimately drives the output to eliminate vibration. This method can accurately capture the velocity and displacement vibration deviations of the OLED inkjet printing platform, achieve efficient cancellation of vibration interference, improve ink droplet landing accuracy, reduce printing defects, and ensure the stability and consistency of the printing process. This provides reliable technical support for the high-precision mass production of high-performance OLED display devices.

[0049] Please see Figure 2In a second embodiment of the vibration elimination method for a printing platform according to the present invention, step 104 specifically includes:

[0050] 201. Calculate the ADC speed value according to the preset speed control function model to obtain the speed feedback compensation force;

[0051] In this embodiment, It is the transfer function of the speed feedback controller series driver actuator, and the ADC speed value is processed by... Processing yields speed feedback compensation force The speed control function model includes a speed transfer function, the expression of which is as follows:

[0052] ,

[0053] In the formula, for the speed controller function Includes a first-order high-pass filter, a PD circuit, a first-order low-pass filter, a notch filter, and a hysteresis compensation circuit. The cutoff frequency of a first-order high-pass filter. For PD process ratio coefficient, For differential coefficients, For time constant, The cutoff frequency of the first-order low-pass filter. The first parameter is the notch filter coefficient. The second parameter is the notch filter coefficient. The third parameter is the notch filter coefficient. For the transfer function coefficients of the first lag correction element, represents the transfer function coefficient of the second lag compensation element, and s is the complex frequency;

[0054] The velocity signal (ADC velocity value) can be described using a time-domain signal, which is converted into a complex frequency through a Fourier transform, where 's' represents the complex frequency of the velocity. In control engineering and signal processing, the transfer function is an important tool for describing the relationship between the input and output of a system. The transfer function is usually obtained through the Laplace transform. The transfer function is one of the basic mathematical tools for describing the dynamic characteristics of linear systems. The main research methods of classical control theory, such as the frequency response method and the root locus method, are based on the transfer function. The transfer function is one of the main tools for studying classical control theory and has important mathematical and physical significance.

[0055] Definition and origin of s

[0056] In the Laplace transform, s = σ + jω, where:

[0057] σ is the real part, which determines whether the system response decays or increases.

[0058] jω is the imaginary part, representing the oscillation frequency of the system;

[0059] j is the imaginary number sign;

[0060] s is a complex frequency;

[0061] By introducing s, the Laplace transform converts the differential equations in the time domain into algebraic equations. The S-domain is a complex frequency domain analysis method with complex frequencies s = σ + jω as variables. By converting the time-domain signal into a complex frequency domain representation through the Laplace transform, this method can handle exponentially growing signals and calculate the total response of linear time-invariant systems when decomposing time-domain signals with the imaginary exponent exp(jωt) as the basic signal. It overcomes the limitations of the Fourier transform. Its core lies in converting differential and integral operations into multiplication and division, and analyzing system performance through the distribution of zeros and poles of the system function, while maintaining the basic characteristics of the LTI system response integral (inverse Fourier transform), thus simplifying the calculation process. Based on the preset speed control function model, the ADC speed value is calculated to accurately generate speed feedback compensation force, which can specifically suppress speed-related vibration deviations caused by the movement of the OLED inkjet printing platform, effectively offset vibration interference, improve ink droplet landing accuracy, reduce printing defects, and ensure the stability and reliability of the OLED inkjet printing process.

[0062] 202. Calculate the ADC displacement value according to the preset displacement control function model to obtain the displacement feedback compensation force;

[0063] In this embodiment, It is the transfer function of the displacement feedback controller series driver actuator, and the ADC displacement value is processed by... Processing yields speed feedback compensation force The displacement control function model includes a displacement transfer function, the expression of which is as follows:

[0064] ,

[0065] In the formula, for the displacement controller function It includes a first-order high-pass filter, a PI circuit, a first-order low-pass filter, a notch filter, and a hysteresis compensation circuit. The integral coefficient is... To prevent integrator saturation, a small amount is introduced into the denominator. The first-order low-pass filter cutoff frequency is used to accurately calculate the ADC displacement value based on the displacement control function model and generate the corresponding displacement feedback compensation force. This can specifically suppress displacement-type vibration deviations generated during the movement of the OLED inkjet printing platform, effectively offset vibration interference, improve the accuracy of ink droplet landing, reduce printing defects, and ensure the stability and reliability of the OLED inkjet printing process.

[0066] 203. Summate the velocity feedback compensation force and the displacement feedback compensation force to obtain the feedback compensation force;

[0067] In this embodiment, feedback compensation force For speed feedback compensation force Displacement feedback compensation force The sum, see the following formula for reference:

[0068] By summing the speed feedback compensation force and the displacement feedback compensation force, a comprehensive feedback compensation force is obtained, which can accurately cancel the two types of vibration deviations of the OLED inkjet printing platform, namely speed and displacement. This effectively reduces the vibration interference caused by the platform movement, improves the accuracy of ink droplet landing, reduces printing defects, and ensures the stability and reliability of the OLED inkjet printing process.

[0069] In this embodiment, the ADC velocity and displacement values ​​are precisely calculated using velocity control function models and displacement control function models, respectively, to generate corresponding velocity feedback compensation forces and displacement feedback compensation forces. These forces are then summed to obtain the comprehensive feedback compensation force. This mechanism can comprehensively capture velocity and displacement vibration deviations in the movement of the OLED inkjet printing platform, achieving precise cancellation of vibration interference, effectively improving ink droplet landing accuracy, reducing printing defects, ensuring the stability and reliability of the OLED inkjet printing process, and providing strong support for the high-precision production of high-performance OLED display devices.

[0070] Please see Figure 3 In a third embodiment of a vibration elimination method for a printing platform according to the present invention, step 105 specifically includes:

[0071] 301. Obtain the nozzle mass and nozzle acceleration;

[0072] 302. Calculate the feedback compensation force, nozzle mass, and nozzle acceleration to obtain the driving reaction force compensation value;

[0073] In this embodiment, by calculating the feedback compensation force with the printhead mass and acceleration, the driving reaction force compensation value is accurately obtained, which can specifically counteract the vibration interference caused by the printhead movement of the OLED inkjet printing platform, effectively improve the ink droplet landing accuracy, reduce printing defects, and ensure the stability and reliability of the printing process.

[0074] 303. The drive reaction force compensation value is converted according to the preset actuator function formula to obtain the DAC output value;

[0075] 304. Control the motor to output a vibration-eliminating driving reaction force to the printing platform based on the DAC output value;

[0076] In this embodiment, DAC output data is obtained according to the actuator function formula; finally, the data is written into the DAC chip, and the motor output drive reaction force compensates for the vibration error caused by the movement of the OLED inkjet printing platform's motion axis; the DAC output value is obtained by converting the drive reaction force compensation value according to the actuator function formula, and the motor is controlled to output vibration to the OLED inkjet printing platform to eliminate the drive reaction force, accurately compensate for the vibration error caused by the movement of the platform's motion axis, effectively offset vibration interference, improve the accuracy of ink droplet landing, reduce printing defects, and ensure the stability and reliability of the printing process;

[0077] In this embodiment, by accurately acquiring the printhead mass and acceleration parameters, and combining them with feedback compensation force calculation to obtain the drive reaction force compensation value, and then using a preset actuator function formula to convert it into a DAC output value, the motor is controlled to output vibration to the OLED inkjet printing platform to eliminate the drive reaction force. This achieves precise compensation for the printhead movement and platform motion axis vibration, effectively offsetting vibration interference, improving ink droplet landing accuracy, reducing printing defects, ensuring the uniformity and consistency of the printed pattern, enhancing the stability and reliability of the OLED inkjet printing process, and providing strong technical support for the high-precision mass production of high-performance OLED display devices.

[0078] Please see Figure 4 In the fourth embodiment of the vibration elimination method for a printing platform according to the present invention, step 302 specifically includes:

[0079] 401. Calculate the feedforward compensation force by multiplying the nozzle mass and nozzle acceleration.

[0080] In this embodiment, the following formula is referenced:

[0081] ;

[0082] In the formula, the feedforward compensation force In the formula, For nozzle quality, The feedforward compensation force is calculated by multiplying the printhead mass and acceleration to offset the vibration interference caused by the printhead movement during OLED inkjet printing. This accurately compensates for the vibration error of the platform's motion axis, effectively improves the accuracy of ink droplet landing, reduces printing defects, ensures the uniformity of printed patterns, and enhances the stability and reliability of the OLED inkjet printing process.

[0083] 402. Summate the feedback compensation force and the feedforward compensation force to obtain the driving reaction force compensation value;

[0084] In this embodiment, the driving reaction force compensation value For feedforward compensation force With feedback compensation force The sum can be obtained by referring to the following formula:

[0085] By summing the feedback compensation force and the feedforward compensation force, the driving reaction force compensation value can be accurately obtained, which can achieve precise compensation for the vibration of the OLED inkjet printing platform, effectively offset the interference caused by the printhead movement and platform shaft vibration, improve the accuracy of ink droplet landing, reduce printing defects, and ensure the stability of the OLED inkjet printing process and the high-precision production requirements.

[0086] In this embodiment, the feedforward compensation force is precisely calculated by multiplying the printhead mass and acceleration, which can specifically counteract the vibration interference generated by the printhead movement during OLED inkjet printing. Then, the feedforward compensation force and the feedback compensation force are summed to obtain a precise driving reaction force compensation value, thereby compensating for the vibration of the printing platform. This effectively counteracts the superimposed interference caused by the printhead movement and the vibration of the platform shaft system, improves the accuracy of ink droplet landing, reduces printing defects, ensures the uniformity and consistency of the printed pattern, enhances the stability and reliability of the OLED inkjet printing process, and provides reliable technical support for the high-precision mass production of high-performance OLED display devices.

[0087] Please see Figure 5 In the fifth embodiment of a vibration elimination method for a printing platform according to the present invention, step 303 specifically includes:

[0088] 501. Obtain the motor driver amplification factor, driver output force constant, and DAC resolution at the current range;

[0089] 502. Based on the actuator function formula, the drive reaction force compensation value, motor driver amplification factor, driver output force constant, and DAC resolution under the current range are converted to obtain the DAC output value;

[0090] In this embodiment, the actuator function formula expression is as follows:

[0091]

[0092] In the formula, The DAC output value, To drive the reaction force compensation value, Motor driver amplification factor Driver output force constant, DAC resolution under the current range; write the DAC output value into the DAC, and the motor outputs the driving reaction force to eliminate vibration and compensate for the vibration error caused by the motion axis movement of the OLED inkjet printing platform;

[0093] In this embodiment, by accurately acquiring the amplification factor of the motor driver, the driver output force constant, and the core parameters of the DAC resolution under the current range, the drive reaction force compensation value is converted with the above parameters based on the actuator function formula to obtain the DAC output value that matches the vibration compensation requirements. After writing this value into the DAC, the motor can output precise vibration to eliminate the drive reaction force, specifically compensating for the vibration error generated by the motion axis movement of the OLED inkjet printing platform. This effectively reduces the interference of platform jitter on the accuracy of ink droplet landing, ensures the uniformity and consistency of the printed pattern, reduces printing defects caused by vibration, improves the stability and high-precision production capability of the OLED inkjet printing process, and provides reliable technical support for the large-scale manufacturing of high-performance OLED display devices.

[0094] Please see Figure 6 In the sixth embodiment of a vibration elimination method for a printing platform according to the present invention, step 304 specifically includes:

[0095] 601. Enter vibration cancellation state based on DAC output value;

[0096] 602. In vibration elimination mode, the motor is controlled to output a driving reaction force to the printing platform to eliminate vibration based on the DAC output value;

[0097] In this embodiment, in order to reduce the vibration of the current printing platform caused by the repeated movement of the printhead and stage in the X direction, the motor is controlled to output a driving reaction force to the printing platform in the preset X direction according to the DAC output value to eliminate vibration, thereby weakening the impact of vibration on the ink droplet landing accuracy during the OLED inkjet printing process and effectively improving the ink droplet landing accuracy.

[0098] In this embodiment, the vibration elimination state is accurately determined and triggered by the DAC output value. Then, the motor is controlled to output a directional driving reaction force based on the value. This specifically solves the problem of printing platform jitter caused by the reciprocating motion of the printhead and stage in the X direction during OLED inkjet printing. It effectively reduces the interference of vibration on the accuracy of ink droplet landing, improves the accuracy of ink droplet positioning, ensures the clarity and consistency of printed patterns, optimizes the overall process quality of OLED inkjet printing, reduces the printing defect rate caused by vibration, and provides reliable technical support for the mass production of high-precision OLED display devices.

[0099] Please see Figure 7 The seventh embodiment of a vibration elimination method for a printing platform according to the present invention includes step 101, which specifically includes:

[0100] 701. Generate a transmission command based on the sampling period;

[0101] 702. Based on the sent command, the control logic processor samples and obtains the ADC input voltage range, ADC resolution, and ADC voltage sampling value;

[0102] In this embodiment, the logic processor is an FPGA logic processor.

[0103] In this embodiment, a precise sending command is generated based on the sampling period to control the FPGA logic processor to efficiently sample the ADC input voltage range, ADC resolution, and ADC voltage sampling values. The FPGA has the technical advantage of high-speed parallel processing, which can ensure the real-time performance of the sampling operation and the accuracy of data acquisition. It avoids the impact of sampling delay or data error on subsequent calculation processes, providing a high-quality data source for the accurate conversion of subsequent speed and displacement values. This ensures the stable operation of the vibration compensation mechanism, effectively reduces vibration interference of the OLED inkjet printing platform, improves ink droplet landing accuracy, reduces printing defects, and enhances the stability and consistency of the entire printing process. This provides key data acquisition support for the mass production of high-performance OLED display devices.

[0104] The above describes a method for eliminating vibration of a printing platform according to an embodiment of the present invention. The following describes a system for eliminating vibration of a printing platform according to an embodiment of the present invention. Please refer to [link / reference]. Figure 8 One embodiment of a vibration elimination system for a printing platform according to the present invention includes:

[0105] A printing platform vibration elimination system performs a printing platform vibration elimination method as described above. The printing platform vibration elimination system includes a control device 1, a printing platform 2 electrically connected to the control device 1, a logic processor 3, and a motor 4.

[0106] Figure 9This is a schematic diagram of the structure of a printing platform vibration elimination device 900 provided in an embodiment of the present invention. This printing platform vibration elimination device 900 can vary significantly due to different configurations or performance. It may include one or more central processing units (CPUs) 910 (e.g., one or more processors) and a memory 920, and one or more storage media 930 (e.g., one or more mass storage devices) storing application programs 933 or data 932. The memory 920 and storage media 930 can be temporary or persistent storage. The program stored in the storage media 930 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the printing platform vibration elimination device 900. Furthermore, the processor 910 may be configured to communicate with the storage media 930 and execute the series of instruction operations in the storage media 930 on the printing platform vibration elimination device 900 to implement the steps of the printing platform vibration elimination method provided in the above-described method embodiments.

[0107] A printing platform vibration elimination device 900 may further include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input / output interfaces 960, and / or one or more operating devices 931, such as Windows Server, MacOSX, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 9 The structure of the printing platform vibration elimination device 900 shown does not constitute a limitation on the printing platform vibration elimination device 900. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0108] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the device or unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0109] A computer-readable storage medium storing instructions that, when executed by a processor, implement the steps of a vibration elimination method for a printing platform as described above.

[0110] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for eliminating vibration on a printing platform, characterized in that, A vibration elimination system for a printing platform is applied, the system comprising a printing platform, and the method for eliminating printing platform vibration includes: The ADC input voltage range, ADC resolution, and ADC voltage sampling values ​​are obtained by sampling according to the preset sampling period. The ADC speed value is obtained by converting the ADC resolution, ADC voltage sampling value, ADC input voltage range and preset speed sensor constant according to the speed conversion formula. The ADC resolution, ADC voltage sampling value, ADC input voltage range, and preset displacement sensor constant are converted according to the displacement conversion formula to obtain the ADC displacement value. The ADC velocity and displacement values ​​are calculated to obtain the feedback compensation force; The printing platform is output with a driving reaction force to eliminate vibration based on the feedback compensation force; The printing platform vibration elimination system also includes a motor, and the driving reaction force output to the printing platform to eliminate vibration based on the feedback compensation force includes: Obtain nozzle mass and nozzle acceleration; The feedback compensation force, nozzle mass, and nozzle acceleration are calculated to obtain the driving reaction force compensation value; The drive reaction force compensation value is converted according to the preset actuator function formula to obtain the DAC output value; The motor outputs a driving force to the printing platform to eliminate vibration, based on the DAC output value.

2. The method for eliminating vibration on a printing platform as described in claim 1, characterized in that, The calculation of the ADC velocity and ADC displacement values ​​to obtain the feedback compensation force includes: The ADC speed value is calculated based on the preset speed control function model to obtain the speed feedback compensation force; The displacement value of the ADC is calculated based on the preset displacement control function model to obtain the displacement feedback compensation force. The velocity feedback compensation force and the displacement feedback compensation force are summed to obtain the feedback compensation force.

3. The method for eliminating vibration on a printing platform as described in claim 1, characterized in that, The calculation of the feedback compensation force, nozzle mass, and nozzle acceleration to obtain the driving reaction force compensation value includes: The feedforward compensation force is obtained by multiplying the nozzle mass and nozzle acceleration. The feedback compensation force and the feedforward compensation force are summed to obtain the driving reaction force compensation value.

4. The method for eliminating vibration on a printing platform as described in claim 1, characterized in that, The step of converting the drive reaction force compensation value according to a preset actuator function formula to obtain the DAC output value includes: Obtain the motor driver amplification factor, driver output force constant, and DAC resolution at the current range; The DAC output value is obtained by converting the drive reaction force compensation value, motor driver amplification factor, driver output force constant, and DAC resolution under the current range according to the actuator function formula.

5. The method for eliminating vibration on a printing platform as described in claim 1, characterized in that, The method of controlling the motor to output a vibration-eliminating driving reaction force to the printing platform based on the DAC output value includes: The system enters vibration cancellation mode based on the DAC output value. In vibration elimination mode, the motor is controlled to output a driving reaction force to the printing platform to eliminate vibration based on the DAC output value.

6. The method for eliminating vibration on a printing platform as described in claim 1, characterized in that, The printing platform vibration elimination system also includes a logic processor. The step of sampling the ADC input voltage range, ADC resolution, and ADC voltage sampling values ​​according to a preset sampling period includes: Generate a sending command based on the sampling period; The control logic processor obtains the ADC input voltage range, ADC resolution, and ADC voltage sampling value based on the sent command.

7. A vibration elimination system for a printing platform, characterized in that, The printing platform vibration elimination method according to any one of claims 1-6 is implemented, wherein the printing platform vibration elimination system includes a control device, a printing platform electrically connected to the control device, a logic processor, and a motor.

8. A vibration elimination device for a printing platform, characterized in that, include: A memory and at least one processor, wherein the memory stores instructions; At least one of the processors invokes the instructions in the memory to cause the printing platform vibration elimination device to perform the steps of the printing platform vibration elimination method as claimed in any one of claims 1-6.

9. A computer-readable storage medium storing instructions thereon, characterized in that, When the instructions are executed by the processor, they implement the steps of the vibration elimination method for a printing platform as described in any one of claims 1-6.

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