Ribbon Electrode Touch Panel for Low Groundmass Interference
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Solution Overview
Problem
Thin and light OLED touch display screens, especially those with FMLOC structure, experience poor touch performance in low groundmass conditions due to excessive coupling capacitance and interference signals, leading to reduced touch accuracy and effectiveness.
Innovation Solution
The touch panel design features alternately arranged ribbon-shaped first and second electrode patterns with offset strip sections, increasing mutual capacitance and reducing contact area with the finger, along with a bridge layer and dummy electrode patterns to enhance touch signal strength and reduce interference, while maintaining uniform optical transmittance and display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional touch panel electrode designs are used, then the structure is simple and easy to manufacture, but the touch performance deteriorates under low groundmass conditions due to excessive coupling capacitance and interference signals
Solution Approach 1:
The touch panel divides the touch area into multiple touch units, with each touch unit containing multiple electrode patterns (first electrode patterns and second electrode patterns) arranged in parallel. This segmentation allows independent control and optimization of capacitance characteristics in different regions, improving touch performance under low groundmass conditions while managing structural complexity through modular design
Solution Approach 2:
Different electrode patterns are assigned different functions and configurations within the same touch panel. First electrode patterns and second electrode patterns have different widths, orientations, and capacitance characteristics tailored to specific regions and touch detection needs, optimizing local capacitance control to reduce interference signals while maintaining overall structural feasibility
2Reliability
If larger electrode contact area is used to increase touch signal strength, then the touch signal strength improves, but the coupling capacitance increases causing more interference signals
Solution Approach 1:
The electrode system is divided into multiple parallel electrode patterns (first and second electrode patterns) with different configurations. This segmentation distributes the touch signal detection across multiple smaller electrode elements rather than one large electrode, maintaining sufficient signal strength through cumulative effect while reducing the coupling capacitance of individual electrodes to minimize interference
Solution Approach 2:
The patent optimizes parameters such as electrode width, spacing, and arrangement configuration to achieve the desired balance. By adjusting these parameters, the system maintains adequate touch signal strength while controlling coupling capacitance levels to reduce interference signals under low groundmass conditions
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 design improves touch performance under low groundmass conditions by increasing effective touch signal strength, reducing interference, and ensuring uniform display brightness and optical transmittance, making it suitable for thin and light display devices.
Implementation Method 1
the problem of poor touch effect may occur, especially for a particularly thin and light OLED touch display screen (such as FMLOC (Flexible Multiple Layer On Cell) structure), this kind of problem may be more obvious
Data Source
AI summary
a touch panel and a display device are provided, the touch panel includes: a plurality of columns of touch units, each column of touch units includes a plurality of touch units arranged along a first direction, and at least one touch unit in a same column of touch units comprises a plurality of first electrode patterns and a plurality of second electrode patterns arranged in parallel, each of the first electrode patterns and the second electrode patterns has a ribbon shape and extends along the first direction, the plurality of first electrode patterns and the plurality of second electrode patterns are alternately arranged along the second direction, the second direction and the first direction intersect each other, and the first electrode patterns and the second electrode patterns are electrically insulated from each other.