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CN-122018728-A - Method and system for optimizing consistency of original data of capacitive touch screen

CN122018728ACN 122018728 ACN122018728 ACN 122018728ACN-122018728-A

Abstract

The invention provides a method and a system for optimizing consistency of original data of a capacitive touch screen, and belongs to the technical fields of man-machine interaction, capacitive touch sensing and signal processing. The method comprises the steps of carrying out full-screen regional division on a capacitive touch screen, generating multi-logic block data, deploying a hardware structure precise optimization module according to the multi-logic block data, completing compensation electrode design and manufacture, electrode array partition control and substrate film layer consistency processing, and constructing a hardware base network, wherein the method compresses baseline deviation of full-screen original data to be within +/-3% through four-dimensional cooperation of hardware structure precise optimization, circuit dynamic adaptation, algorithm real-time calibration and process full-flow guarantee, so that touch positioning precision and linearity are remarkably improved, and when a user carries out tiny icon clicking or handwriting input, operation position identification is more precise, and chirality is remarkably enhanced.

Inventors

  • SONG ZEXUN
  • XU LIMAN

Assignees

  • 广东视安通实业有限公司

Dates

Publication Date
20260512
Application Date
20260128

Claims (10)

  1. 1. The method for optimizing the consistency of the original data of the capacitive touch screen is characterized by comprising the following steps of: S1, carrying out full-screen regional division on a capacitive touch screen to generate multi-logic block data, deploying a hardware structure accurate optimization module according to the multi-logic block data, completing compensation electrode design and manufacturing, electrode array partition control and substrate film layer consistency processing, and constructing a hardware basic network; s2, carrying out multichannel dynamic adaptation based on a hardware basic network, and carrying out independent gain/zero calibration on each induction channel through a programmable gain amplifier and an offset calibration circuit; S3, constructing a three-dimensional calibration database by utilizing the original data acquired by the circuit dynamic adaptation system, and establishing a four-dimensional mapping model of coordinates, temperature, humidity and capacitance values by a machine learning algorithm; S4, introducing an automatic pre-calibration flow in a production link, scanning the electrical characteristics of each logic block through special test equipment, and establishing an individual equipment original data response model; s5, dynamically compensating the real-time acquired data through an algorithm calibration parameter set according to initial calibration parameter starting equipment output by the pre-calibration closed-loop system, executing full-screen data consistency detection once every 500ms, automatically triggering a recalibration process when the area deviation exceeds a threshold value, and generating a high-consistency touch control data stream with full-screen original data base line deviation less than or equal to +/-3%.
  2. 2. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 1, wherein S1 comprises: s11, carrying out full-screen geometric analysis of the capacitive touch screen, and carrying out regional division according to electric field distribution characteristics to generate multi-logic block data; S12, aiming at electrode characteristics of different areas in the multi-logic block data, starting accurate design and manufacture of a compensation electrode, acquiring profile data of a defective main electrode through high-resolution optical scanning, determining a compensation area through quantitative analysis, processing a stepped compensation electrode by adopting a laser etching process, and realizing reliable connection of the compensation electrode and the main electrode by matching with a low-resistance connection process; s13, based on the partition planning of multiple logic blocks, implementing the partition control of an electrode array, defining the range of each region by taking the geometric center of a screen as a reference, adopting a photoresist coating and exposure developing process to realize the differential processing of the electrode spacing of different regions, and adopting a special photoetching process to process an electrode structure for a flexible region; S14, advancing the consistency treatment of the substrate and the film layer, selecting the substrate with high flatness, improving the adhesive force of the film layer through pretreatment, and uniformly coating the conductive film layer by adopting a magnetron sputtering or micro-concave coating process; s15, integrating the design and manufacture of the compensation electrode, the partition control of the electrode array and the consistency processing result of the substrate film layer, deploying a hardware structure accurate optimization module, and constructing a hardware base network with regional characteristic compensation capability.
  3. 3. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 2, wherein S13 includes: The method comprises the steps of receiving partition planning data of a plurality of logic blocks, extracting electrode distribution requirements of each region, and generating region electrode configuration parameters; Preparing a photoresist material according to the regional electrode configuration parameters, and finishing coating operation according to a set thickness to form a uniform photoresist film layer; setting exposure energy parameters according to the interval standard of each region, and executing an exposure development process to realize interval differential forming of the edge region of the transition region of the central region; aiming at the characteristics of the flexible area, special photoetching process parameters are adjusted, and the line width mesh and node morphology of the metal grid electrode are processed; and detecting the space precision of the formed electrode array, verifying that the space of each region meets a preset standard, and generating the electrode array partition control completion data.
  4. 4. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 1, wherein S2 comprises: s21, deploying a multichannel programmable gain amplifier and an offset calibration circuit by means of a hardware base network to form a multichannel dynamic adaptive architecture; s22, inputting standard signals to each induction channel, collecting output signal amplitude values, analyzing channel response deviation, implementing independent gain and zero calibration to each induction channel, and unifying channel response characteristics; s23, deploying a temperature and humidity sensing module, collecting environmental parameters according to a fixed period, and establishing an association relation between the environmental parameters and a reference capacitor; s24, calculating a dynamic reference capacitance compensation value according to the acquired environmental parameters, synchronously adjusting the acquisition parameters of the original data, and inhibiting capacitance drift caused by temperature and humidity; S25, optimizing a crosstalk suppression circuit, designing an RC filter network matched with the working frequency of the electrode, outputting an electrode driving signal in a differential driving mode, setting a shielding ground layer, and integrating channel calibration, reference capacitance compensation and crosstalk suppression optimization results to form a circuit dynamic adaptation system with enhanced environmental adaptability.
  5. 5. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 1, wherein the step S3 comprises: S31, collecting original data of different test points of each logic block under different temperature and humidity combined environments through a circuit dynamic adaptation system, screening the collected original data, removing abnormal samples deviating from a normal range, and retaining effective data; s32, constructing a three-dimensional calibration database based on the effective data, and storing the associated information of coordinates, temperature, humidity and capacitance values; s33, deploying a Kalman filtering algorithm, configuring corresponding parameters, carrying out noise filtering on the dynamically acquired data, carrying out linear fitting on the continuously acquired data of the same test point by adopting a least square method, and dynamically adjusting gain coefficients and offset; S34, optimizing a multi-point touch data separation strategy, fusing self-capacitance and mutual capacitance data to perform touch positioning, establishing a crosstalk identification model, predicting a touch track, integrating a mapping model, a noise filtering result, fitting parameters and the multi-point touch data separation strategy, and generating an algorithm calibration parameter set with environmental compensation capability.
  6. 6. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 1, wherein S4 comprises: S41, deploying special test equipment in a production link to form an automatic pre-calibration flow framework, carrying out comprehensive electrical characteristic scanning on each induction channel of each touch screen through the special test equipment, and collecting a large amount of original data; S42, analyzing response characteristics of the individual equipment based on the collected original data, and establishing an individual equipment original data response model; S43, burning the pre-calibration parameter packet into a nonvolatile memory of a touch controller, implementing full-flow process control, detecting electrode processing quality through automatic optical detection equipment, extracting sample test film performance, controlling assembly precision by adopting a visual positioning system, and screening qualified products; s44, integrating the pre-calibration parameter generation, burning and process control flow to form a pre-calibration closed loop system for process full flow guarantee.
  7. 7. The method for optimizing consistency of raw data of a capacitive touch screen according to claim 1, wherein S5 comprises: S51, starting the capacitive touch screen equipment, calling initial adjustment parameters stored in a pre-adjustment closed-loop system, and finishing initial equipment setting; S52, dynamically compensating the original data acquired in real time by using an algorithm calibration parameter set, and correcting data deviation, wherein full-screen data consistency detection is executed once every 500ms, and deviation between data in each area and a calibration value is compared; S53, when detecting that the regional deviation exceeds a set standard and exceeds the standard for a plurality of times, automatically triggering a recalibration process and updating calibration parameters; s54, generating a high-consistency touch control data stream with the baseline deviation of full-screen original data less than or equal to +/-3% through dynamic compensation, consistency detection, automatic calibration and fault tolerance processing.
  8. 8. The method for optimizing the consistency of raw data of a capacitive touch screen according to claim 7, wherein S52 comprises: S521, an algorithm calibration parameter set is fetched, original sensing data acquired in real time is synchronously received, and the original sensing data is integrated to form a data set to be compensated; S522, outputting the data after preliminary compensation, comparing the data with a preset ideal data range, verifying the compensation effect and generating compensation effectiveness feedback; s523, starting a timing detection mechanism, setting a detection period of 500ms, and generating a periodic detection trigger signal; S524, calculating the difference value between the compensated data and the calibration reference value one by one according to the areas, counting the deviation amplitude of each area to generate an area deviation detail, and summarizing the dynamic compensation result and the area deviation detail to form a data consistency detection report which provides a basis for subsequent abnormal judgment.
  9. 9. The method for optimizing the consistency of raw data of a capacitive touch screen according to claim 8, wherein S521 comprises: Starting a parameter calling process, extracting an algorithm calibration parameter set from a touch controller storage module, and generating parameter extraction completion feedback; Receiving real-time original sensing data transmitted by each logic block and each sensing channel of the touch screen, and sorting according to regional attribution and channel identification to generate an ordered original data sequence; carrying out association matching on the parameter extraction result and the ordered original data sequence, so that the original data of each region corresponds to an exclusive compensation rule, the original data of each channel corresponds to an adaptive filter parameter, and the original data are integrated to form a data set to be compensated; carrying out structural splitting on a data set to be compensated, dividing respective data subsets of a central region, a transition region and an edge region, and simultaneously separating independent data fragments of each sensing channel; Based on the regional compensation rule, baseline correction operation is carried out on each regional data subset, and original data deviation of different regions caused by electric field distribution difference is adjusted to generate regional compensation intermediate data; based on noise filtering parameters, carrying out targeted filtering treatment on the regional compensation intermediate data of each channel, and reserving real touch sensing characteristics; and re-integrating the filtered regional data of each channel according to the original structure, checking the data integrity and the regional continuity, generating a complete data set after dynamic compensation, and finishing the correction of the original data deviation.
  10. 10. A system for implementing the capacitive touch screen raw data consistency optimization method of claim 1, the system comprising: The network construction module is used for carrying out full-screen regional division on the capacitive touch screen, generating multi-logic block data, deploying a hardware structure accurate optimization module according to the multi-logic block data, completing the design and manufacture of compensation electrodes, the partition control of an electrode array and the consistency treatment of a substrate film layer, and constructing a hardware basic network; The dynamic adaptation module is used for carrying out multichannel dynamic adaptation based on a hardware basic network, and carrying out independent gain/zero calibration on each induction channel through a programmable gain amplifier and an offset calibration circuit; The real-time calibration module is used for constructing a three-dimensional calibration database by utilizing the original data acquired by the circuit dynamic adaptation system, and establishing a four-dimensional mapping model of coordinates, temperature, humidity and capacitance values by a machine learning algorithm; the calibration closed loop module is used for introducing an automatic pre-calibration flow in a production link, scanning the electrical characteristics of each logic block through special test equipment, and establishing an individual equipment original data response model; The dynamic compensation module is used for starting equipment according to initial adjustment parameters output by the pre-calibration closed-loop system, dynamically compensating real-time acquired data through an algorithm adjustment parameter set, executing full-screen data consistency detection once every 500ms, automatically triggering a recalibration process when the regional deviation exceeds a threshold value, and generating a high-consistency touch control data stream with full-screen original data base line deviation less than or equal to +/-3%.

Description

Method and system for optimizing consistency of original data of capacitive touch screen Technical Field The invention provides a method and a system for optimizing consistency of original data of a capacitive touch screen, and belongs to the technical fields of man-machine interaction, capacitive touch sensing and signal processing. Background In the technical field of the current capacitive touch screen, the insufficient consistency of original data becomes a key bottleneck for restricting the improvement of touch performance, the traditional calibration scheme mostly adopts global or zoned unified gain/offset compensation, but can partially improve data fluctuation, but can not eliminate local sensitivity attenuation of an edge area caused by electric field distortion, so that an obvious dead zone and an allergic zone exist in the touch response of the whole screen; The compensation loss of the production link becomes a toggle factor of the product yield, an individual equipment response model is not established in the prior art, the process defects such as uneven thickness of ITO coating, differential impedance of FPC and the like directly cause the baseline deviation of original data to exceed +/-8 percent, and later-stage dependent software filtering is difficult to correct at all; the patch type optimization thought is still passive in nature, data fluctuation is still realized, a data consistency optimization system is not actively constructed, and a market is in urgent need of an original data optimization technology from a production source to full-chain coverage of a use scene and depth fusion of all dimensions so as to break through an application barrier of a high-precision touch scene. Disclosure of Invention The invention provides a method and a system for optimizing consistency of original data of a capacitive touch screen, which are used for solving the problems mentioned in the background art: the invention provides a method for optimizing consistency of original data of a capacitive touch screen, which comprises the following steps: S1, carrying out full-screen regional division on a capacitive touch screen to generate multi-logic block data, deploying a hardware structure accurate optimization module according to the multi-logic block data, completing compensation electrode design and manufacturing, electrode array partition control and substrate film layer consistency processing, and constructing a hardware basic network; s2, carrying out multichannel dynamic adaptation based on a hardware basic network, and carrying out independent gain/zero calibration on each induction channel through a programmable gain amplifier and an offset calibration circuit; S3, constructing a three-dimensional calibration database by utilizing the original data acquired by the circuit dynamic adaptation system, and establishing a four-dimensional mapping model of coordinates, temperature, humidity and capacitance values by a machine learning algorithm; S4, introducing an automatic pre-calibration flow in a production link, scanning the electrical characteristics of each logic block through special test equipment, and establishing an individual equipment original data response model; s5, dynamically compensating the real-time acquired data through an algorithm calibration parameter set according to initial calibration parameter starting equipment output by the pre-calibration closed-loop system, executing full-screen data consistency detection once every 500ms, automatically triggering a recalibration process when the area deviation exceeds a threshold value, and generating a high-consistency touch control data stream with full-screen original data base line deviation less than or equal to +/-3%. The invention provides a system for realizing the method for optimizing the consistency of the original data of the capacitive touch screen, which comprises the following steps: The network construction module is used for carrying out full-screen regional division on the capacitive touch screen, generating multi-logic block data, deploying a hardware structure accurate optimization module according to the multi-logic block data, completing the design and manufacture of compensation electrodes, the partition control of an electrode array and the consistency treatment of a substrate film layer, and constructing a hardware basic network; The dynamic adaptation module is used for carrying out multichannel dynamic adaptation based on a hardware basic network, and carrying out independent gain/zero calibration on each induction channel through a programmable gain amplifier and an offset calibration circuit; The real-time calibration module is used for constructing a three-dimensional calibration database by utilizing the original data acquired by the circuit dynamic adaptation system, and establishing a four-dimensional mapping model of coordinates, temperature, humidity and capacitance values by a machine learning algorith