Touch Panel Interconnection Network Auto-Calibration
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Solution Overview
Problem
Modern touch screen devices face challenges in detecting defects in touch panels, such as broken electrodes or manufacturing deviations, which can lead to errors in detecting external conductive objects or styli, and require calibration for electromagnetic interference and varying environments, necessitating a method for configuring interconnection parameters and detecting defects.
Innovation Solution
An electronic system with a touch panel and touch sensitive processing apparatus that includes a detecting circuit, interconnection network, and microprocessor to detect impedance values and phase shifts, allowing for the identification of defective electrodes and correct interconnection of electrodes with circuits, and automatic calibration for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch sensitive processing apparatus is designed to be compatible with numerous touch screen modules of different brands and sizes, then the adaptability of the apparatus is improved, but the device complexity increases due to the need to handle varying numbers of touch sensitive electrodes and different interconnection configurations
Solution Approach 1:
The touch sensitive processing apparatus automatically detects and configures interconnection parameters by testing impedance values of circuits connected to touch sensitive electrodes. The system performs self-configuration without requiring manual setup, adapting to different touch panel configurations automatically through impedance measurement and automatic parameter setting
Solution Approach 2:
The system changes operational parameters dynamically by measuring impedance values of different circuit connections and automatically adjusting interconnection parameters based on the detected configuration. This allows the apparatus to adapt to various touch screen modules by modifying its operating parameters rather than requiring hardware reconfiguration
2Measurement precision
If parameters of the touch sensitive processing apparatus are manually calibrated and tested for each electronic apparatus, then the measurement precision of touch detection is improved, but the loss of time during setup and calibration increases
Solution Approach 1:
The system performs automatic parameter configuration and defect detection during the initialization phase before normal operation begins. By conducting impedance measurements and interconnection parameter setup automatically during startup, the calibration time is eliminated from the operational phase, and touch detection accuracy is achieved without manual intervention
Solution Approach 2:
The touch sensitive processing apparatus automatically performs calibration and parameter configuration without requiring external intervention. The system tests impedance values, detects defective electrodes, and configures interconnection parameters autonomously, eliminating manual calibration time while maintaining measurement precision
3Device complexity
If the touch sensitive processing apparatus uses a defective touch panel with broken electrodes or manufacturing deviations, then the device complexity remains the same, but the reliability of touch detection deteriorates due to errors in detecting external conductive objects
Solution Approach 1:
The system performs defect detection by measuring impedance values of all circuits connected to touch sensitive electrodes before normal operation. By identifying defective electrodes through impedance testing in advance, the system can alert users or operators to replace faulty components, ensuring reliable touch detection during actual use
Solution Approach 2:
The system provides feedback about the condition of touch sensitive electrodes by measuring and analyzing impedance values. Based on the impedance measurements, the system can identify defective electrodes and communicate this information to the user, allowing for timely replacement or adjustment to maintain detection reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate detection of defects and correct interconnection of touch panel electrodes, ensuring proper function and user experience by automatically configuring parameters and detecting faulty components, thus improving manufacturing efficiency and user interaction.
Implementation Method 1
detecting an impedance value of each of the P first circuits sequentially via the interconnection network
Implementation Method 2
having the detecting circuit detect the drive signal via the plurality of second touch sensitive electrodes; calculating a phase shift between each neighboring pair of second touch sensitive electrodes
Data Source
AI summary
The present application provides a touch sensitive processing method for configuring interconnection parameters between a touch panel and a touch sensitive processing apparatus in an electronic system. The method comprises: connecting, by an interconnection network of the touch sensitive processing apparatus, P first circuits of a first apparatus connector with a drive circuit of the apparatus, connecting, by the interconnection network, Q second circuits of a second apparatus interface with a detecting circuit of the apparatus, respectively; having the drive circuit emit a drive signal from at least one of first touch sensitive electrodes via the interconnection network; and detecting, via the interconnection network by the detecting circuit, that there are N consecutive second touch sensitive electrodes connected to the N consecutive second circuits among the Q second circuits.