Touch Control Display Panel Signal Delay Equalization
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Solution Overview
Problem
Capacitive touch control display panels face issues with non-uniform sensitivity due to varying total resistance in touch control sensing electrodes and their connected signal lines, leading to different signal delay times across the panel.
Innovation Solution
The solution involves configuring the touch control display panel with a predetermined relationship between the total resistance of first and second touch control sensing electrodes and their respective signal lines, ensuring that the signal delay times are substantially equal, thereby improving sensitivity uniformity across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If touch control sensing electrodes are disposed in different positions in the touch control display panel, then the touch control display panel can detect touch positions across the entire panel, but the total resistance of each touch control sensing electrode plus the connected signal line varies, leading to different signal delay times and poor uniformity of touch control sensitivity
Solution Approach 1:
The patent applies local quality by configuring different signal line parameters (width, length, or material) for different regions of the display panel. Specifically, signal lines connected to sensing electrodes at different positions are designed with locally optimized characteristics to compensate for position-dependent resistance variations, ensuring uniform signal delay times across the entire panel while maintaining comprehensive touch detection coverage
Solution Approach 2:
The patent implements parameter changes by adjusting the physical parameters of signal lines (such as width, length, or material composition) based on the position of connected sensing electrodes. This allows the total resistance of each sensing electrode plus its signal line to be equalized, thereby achieving uniform signal delay times and consistent touch control sensitivity across different regions of the display panel
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
This configuration ensures that touch control sensing signals from different signal lines exhibit the same signal delay time, enhancing the uniformity of touch control sensitivity across the display panel.
Implementation Method 1
Intersected touch control driving electrodes and touch control sensing electrodes are disposed in the touch control display panel, and a plurality of intersections are formed between the touch control driving electrodes and the touch control sensing electrodes. A capacitor array is formed in the intersections.
Data Source
AI summary
A touch control display panel and a touch control display device are provided. The touch control display panel comprises a plurality of first and second touch control sensing electrodes; a plurality of first and second touch control sensing signal lines; and a first integrated circuit. The first integrated circuit has a longer distance to the first touch control sensing electrode than to the second touch control sensing electrode. R1 and R2 satisfy a predetermined relationship, such that touch control sensing signals respectively outputted by the first touch control sensing signal line and the second touch control sensing signal line exhibit substantially same signal delay time. R1 is a total resistance of the first touch control sensing electrode and the electrically connected first touch control sensing signal line, and R2 is a total resistance of the second touch control sensing electrode and the electrically connected second touch control sensing signal line.