Display Panel Electrode Ratio Optimization for Touch Accuracy
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Solution Overview
Problem
The existing display panels with touch functions have a large difference in central distances between touch driving and sensing electrodes, resulting in low touch accuracy and user experience due to the minimal detectable level difference.
Innovation Solution
The display panel design adjusts the ratio of central distances between touch driving and sensing electrodes to be within the range of 0.5 to 2, ensuring that the first and second electrodes have similar dimensions and arrangements, optimizing their overlap for improved touch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the first central distance between adjacent first electrodes is made much smaller than the second central distance between adjacent second electrodes (ratio k=0.1-0.3), then the display effect is improved, but the touch accuracy deteriorates
Solution Approach 1:
The patent changes the geometric parameters of the electrode arrangement by adjusting the ratio k between the first central distance L1 and second central distance L2 to fall within 0.3-0.7. This parameter optimization simultaneously improves display uniformity and touch detection accuracy, resolving the contradiction between display effect and touch accuracy that existed when k was set to 0.1-0.3
Solution Approach 2:
The patent maintains asymmetric electrode arrangements where the first electrodes (common electrode) and second electrodes (touch sensing electrode) have different central distances, but optimizes the asymmetry ratio k to 0.3-0.7 rather than the extreme 0.1-0.3 range. This controlled asymmetry allows the first electrodes to provide uniform display coverage while the second electrodes maintain sufficient spacing for accurate touch detection
2Adaptability or versatility
If the first central distance L1 is made much smaller than the second central distance L2, then the first electrode can serve both display driving and touch sensing functions effectively, but the finger position detection accuracy decreases
Solution Approach 1:
The first electrode layer is designed to serve dual functions as both common electrode for display driving and touch sensing electrode. By optimizing the central distance ratio k to 0.3-0.7, the patent ensures that the first electrodes maintain sufficient density for effective display control while the second electrodes provide adequate spacing for accurate touch detection, enabling both functions to operate effectively
Solution Approach 2:
The patent optimizes the geometric parameters by setting the ratio k between first central distance L1 and second central distance L2 within 0.3-0.7. This parameter adjustment ensures that the first electrodes can effectively serve both display and touch functions while the second electrodes maintain sufficient spacing for accurate finger position detection, resolving the contradiction between multi-functionality and detection accuracy
Data Source
AI summary
A display panel is provided. The display includes a first electrode layer and a second electrode layer. The first electrode layer includes a plurality of first electrodes, each having a shape extending in a first direction, wherein the plurality of the first electrodes are arranged in a second direction. The second electrode layer includes a plurality of second electrodes extending in the second direction and arranged in the first direction, the second direction being perpendicular to the first direction. A ratio between a first central distance between two adjacent first electrodes, and a second central distance between two adjacent second electrodes is in the range of 0.5 to 2. In the display panel and the display device according to the present disclosure, the display effect is reconciled with the touch recognizing performance, thus improving the touch performance of the panel and user experience.