Touch Control Display Panel Electrode Array Design
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Solution Overview
Problem
Current touch control display panels suffer from poor touch sensitivity due to the large self-resistance of indium tin oxide (ITO) electrodes and limited intersection areas between touch driving and sensing electrodes, resulting in reduced touch accuracy.
Innovation Solution
The design expands intersection areas between touch control electrodes while reducing non-intersection areas, increasing the number of capacitors for detecting touch positions, and optimizing electrode arrangements to improve touch accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO is used as touch control electrode material, then transparency and conductivity are achieved, but self-resistance is substantially large resulting in poor touch sensitivity
Solution Approach 1:
The touch control electrode is divided into multiple sub-electrodes arranged in arrays. By segmenting the electrode structure into first sub-electrodes and second sub-electrodes that form multiple intersection points, the patent increases the number of capacitors for touch detection, thereby improving touch sensitivity without changing the base ITO material properties.
Solution Approach 2:
The patent transitions from traditional linear electrode arrangements to a two-dimensional array structure with multiple intersections. The first touch control electrode array and second touch control electrode array create a grid pattern, adding spatial dimensionality to increase capacitor density and improve sensitivity across the display surface.
2Measurement precision
If the intersection area between touch driving electrode and touch sensing electrode is kept small, then electrode area is saved, but the number of capacitors is limited resulting in low touch accuracy
Solution Approach 1:
The electrode structure is segmented into multiple discrete intersection regions formed by first sub-electrodes and second sub-electrodes. Each intersection creates an independent capacitor, and the segmented array structure allows maximizing the number of intersections within the available electrode area, thereby increasing touch accuracy.
Solution Approach 2:
The patent creates more intersection points than traditionally used, using an M1×N1 array of first sub-electrodes and M2×N2 array of second sub-electrodes. This excessive number of intersections ensures that sufficient capacitors are available for accurate touch detection, even though each individual intersection area remains relatively small.
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 enhances touch accuracy and sensitivity by increasing the number of capacitors within a fixed display area, allowing for more precise touch position detection.
Implementation Method 1
A capacitor is formed in an intersection area between the touch driving electrode and the touch sensing electrode, and a touch position is identified by detecting a capacitance change
Data Source
AI summary
A touch control display panel and a display device are provided. The touch control display panel may comprise a first touch control electrode array including a plurality of first sub-electrodes arranged in an M1×N1 array and a plurality of first connectors, and a second touch control electrode array including a plurality of second sub-electrodes arranged in an M2×N2 array and a plurality of second connectors, where M1, M2, N1, and N2 is a positive integer, respectively. The first control electrode array and the second control electrode array are configured to satisfy at least one of: in the first direction, a width of the first sub-electrode being larger than a width of the first connector, and in the second direction, a width of the second sub-electrode being larger than a width of the second connector.