Touch Display Panel Auxiliary Electrodes for Fast Capacitor Charging
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Solution Overview
Problem
The increasing touch sampling rate in touch display panels results in shorter charging times for touch capacitors, leading to undercharging and reduced sensitivity, affecting user experience.
Innovation Solution
Incorporating auxiliary electrodes that provide an auxiliary signal to touch electrodes to improve charging efficiency, ensuring capacitors reach target values even with short charging times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the touch sampling rate is increased, then the touch response speed is improved, but the charging time for the touch capacitor becomes shorter leading to undercharging
Solution Approach 1:
The patent introduces auxiliary electrodes that pre-charge the touch capacitor before the main touch electrode charges it. This preliminary charging action ensures that even when the sampling rate is high and charging time is short, the capacitor reaches the required voltage level, preventing undercharging while maintaining fast response speed.
Solution Approach 2:
The auxiliary electrodes act as intermediaries between the signal line and the touch capacitor. Instead of directly charging the capacitor through the main touch electrode, the auxiliary electrodes provide an additional charging path, effectively mediating the charge transfer process and ensuring sufficient charging within the limited time window.
2Reliability
If the charging time is extended to fully charge the capacitor, then the touch sensitivity is improved, but the sampling rate must be reduced
Solution Approach 1:
By providing preliminary charge through auxiliary electrodes, the system ensures that the touch capacitor is adequately charged even during high-speed sampling operations. This maintains touch sensitivity without requiring a reduction in sampling rate, as the preliminary charging compensates for the reduced charging time.
Solution Approach 2:
The patent segments the charging function into two parts: the auxiliary electrodes provide the primary charging current to quickly establish the baseline voltage, while the main touch electrode completes the charging process. This segmentation allows the system to maintain high sampling rates while ensuring adequate charging, thereby preserving both sensitivity and productivity.
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
Enhances touch sensitivity and user experience by quickly charging capacitors to target values, improving performance in devices like vehicle-mounted systems and enhancing game experience.
Implementation Method 1
charging time for the touch capacitor is increasingly shorter. When the charging time for the touch capacitor is short, the capacitor is undercharged
Data Source
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AI summary
This application relates to the field of display technologies, and provides a touch display panel, a drive method, and a touch display apparatus, to improve sensitivity of touch and user experience. The touch display panel includes: a plurality of touch electrodes, where the touch electrode is configured to receive a touch scanning signal; and at least one auxiliary electrode, electrically connected to the touch electrode and configured to provide an auxiliary signal to the touch electrode when the touch electrode receives the touch scanning signal, where the auxiliary signal is the same as the touch scanning signal.