Touch Panel Border Electrode Layout for Static Discharge Reliability
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Solution Overview
Problem
Touch display panels are vulnerable to damage from static electricity due to a significant resistance difference between contact and touch electrodes, particularly at the outer edge where static electricity accumulates, leading to reduced reliability.
Innovation Solution
The design includes a touch display panel with a first border region containing contact electrodes, where the edge contact electrode nearest to the outer edge has a minimum line width to increase resistance, reducing the resistance difference and minimizing damage from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the line width of contact electrodes is increased to reduce resistance, then the resistance difference between touch electrode and contact electrode increases, but the edge contact electrode becomes more vulnerable to static electricity damage
Solution Approach 1:
The patent applies local quality by differentiating the line width design of contact electrodes based on their position. Edge contact electrodes (adjacent to the first outer edge) have a minimum line width value, while other contact electrodes have larger line width values. This localized differentiation addresses the specific vulnerability of edge contact electrodes to static electricity accumulation without compromising the overall electrical connection quality.
Solution Approach 2:
The patent changes the physical parameter (line width) of contact electrodes to control their resistance characteristics. By setting the line width of edge contact electrodes to a minimum value, the overall resistance of these electrodes increases, which reduces the resistance difference with touch electrodes and thereby reduces the risk of static electricity damage at the connecting via holes.
2Reliability
If the line width of edge contact electrode is minimized, then the overall resistance of edge contact electrode increases, but the resistance difference with touch electrode is reduced
Solution Approach 1:
The patent applies local quality by differentiating the line width design of contact electrodes based on their position. Edge contact electrodes (adjacent to the first outer edge) have a minimum line width value, while other contact electrodes have larger line width values. This localized differentiation addresses the specific vulnerability of edge contact electrodes to static electricity accumulation without compromising the overall electrical connection quality.
Solution Approach 2:
The patent changes the physical parameter (line width) of contact electrodes to control their resistance characteristics. By setting the line width of edge contact electrodes to a minimum value, the overall resistance of these electrodes increases, which reduces the resistance difference with touch electrodes and thereby reduces the risk of static electricity damage at the connecting via holes.
3Reliability
If different numbers of contact electrodes are arranged in different sub-regions, then the electrical connection is optimized, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the border region into multiple sub-regions along the extension direction of the first border region. Different numbers of contact electrodes are arranged in different sub-regions, with the first border region including a first sub-region and a second sub-region. This segmentation allows optimized electrical connection in each region while managing overall device complexity through systematic regional division.
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 enhances the reliability of the touch display panel by minimizing the risk of damage from static electricity at the connecting via holes, thereby improving overall panel reliability.
Implementation Method 1
a line width of the electrode sub-portion of the edge contact electrode is a minimum value in line widths of all of the electrode sub-portions in the sub-region. The electrode sub-portion of the edge contact electrode can be narrowed, and the line width of the electrode sub-portion increases the overall resistance of the edge contact electrode positively.
Data Source
AI summary
A touch display panel and a touch control display apparatus, touch display panel includes: display region and first border region, first border region includes first outer edge; first touch electrodes are at least located in the display region; contact electrodes at least are located in first border region, the contact electrodes are respectively electrically connected to first touch electrodes. The first border region includes sub-regions in extension direction of first border region. Different numbers of contact electrodes are arranged in different sub-regions. The contact electrodes include at least one electrode sub-portion. The at least one electrode sub-portion of contact electrode is located in one of the sub-regions. The contact electrodes include edge contact electrode adjacent to first outer edge. In at least one of sub-regions, line width of electrode sub-portion of edge contact electrode is minimum value in line widths of all of electrode sub-portions in sub-region.