Touch Panel Sub-Ground Electrode ESD Protection
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Solution Overview
Problem
Touch panels are prone to electric signal interference due to static electricity or ESD, which deteriorates the accuracy of touch inputs.
Innovation Solution
A touch panel design incorporating a substrate with a sensing electrode, wire, ground electrode, and sub-ground electrode, where the ground electrode surrounds the instruction icon and sub-ground electrode protrudes to effectively prevent static electricity and ESD, improving touch accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel is used for input, then user interaction capability is improved, but electric signal interference from static electricity and ESD occurs
Solution Approach 1:
A ground electrode is introduced as an intermediary element between the sensing electrode and the frame. This ground electrode acts as a mediator to intercept and divert static electricity and ESD away from the sensing electrode, preventing direct interference while maintaining touch input functionality.
Solution Approach 2:
The invention converts the harmful effect of static electricity and ESD into a beneficial outcome by providing a controlled discharge path through the ground electrode. The static electricity that would otherwise interfere with sensing is redirected through the ground electrode to the frame, transforming a harmful factor into a safe discharge mechanism that protects the sensing system.
2Measurement precision
If ground electrode is added to prevent static electricity, then touch accuracy is improved, but device complexity increases
Solution Approach 1:
The grounding system is segmented into distinct functional zones: a ground electrode positioned between the sensing electrode and frame, and a sub-ground electrode extending toward the end of the substrate. This segmentation allows each electrode to perform its specific function efficiently while maintaining overall system simplicity through clear functional division.
Solution Approach 2:
The ground electrode is strategically positioned only in areas where static electricity accumulation is most problematic, specifically between the sensing electrode and frame, and extended toward substrate ends. This localized approach provides targeted protection without requiring comprehensive grounding of the entire structure, thereby reducing overall complexity.
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
The design effectively prevents signal interference from static electricity and ESD, enhancing the accuracy and reliability of touch inputs by redirecting static electricity and noise away from sensitive components.
Implementation Method 1
a ground electrode (601) on the substrate (100); a sub-ground electrode (602) protruding toward an end portion of the substrate (100)
Data Source
AI summary
A touch panel of the embodiment includes a substrate including an active area and an unactive area; a sensing electrode on the substrate; a wire electrically connected with the sensing electrode; a ground electrode on the substrate; a sub-ground electrode protruding toward an end of the substrate; and a first area defined by the sub-ground electrode, wherein the first area has a width larger than a line width of the sub-ground electrode. A touch device of the embodiment includes a display panel; and a touch panel on the display panel, wherein the touch panel includes a substrate; a sensing electrode on the substrate; a wire electrically connected with the sensing electrode; a ground electrode on the substrate; a sub-ground electrode protruding toward an end of the substrate; and a first area defined by the sub-ground electrode.