Display Panel Electrode Openings for Touch SNR Improvement
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Solution Overview
Problem
The integration of touch functions in large and high-resolution in-cell display panels results in a reduced touch signal-to-noise ratio due to increased parasitic capacitance between common electrode blocks and data lines, leading to poor touch performance.
Innovation Solution
The design incorporates common electrode blocks with strategically placed openings that overlap with data lines, reducing the overlapping area and parasitic capacitance, thereby improving touch performance by minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size and resolution of the touch display panels increase, then the display quality is improved, but the touch signal-to-noise ratio reduces due to increased parasitic capacitance
Solution Approach 1:
The patent extracts the problematic overlapping area between common electrode blocks and data lines by introducing openings in the common electrode blocks. These openings remove the conductive material that creates parasitic capacitance, directly addressing the source of the signal-to-noise ratio degradation while maintaining display resolution through the modular electrode block structure
Solution Approach 2:
The patent applies local quality by creating openings specifically in the regions where common electrode blocks overlap with data lines. This localized modification reduces parasitic capacitance at critical interfaces without affecting the overall electrode block structure or display resolution, allowing different regions of the electrode to have different properties
2Adaptability or versatility
If common electrode blocks are reused as touch electrodes, then touch functionality is integrated, but parasitic capacitance with data lines increases
Solution Approach 1:
The patent removes the harmful parasitic capacitance by extracting conductive material through openings in the common electrode blocks that overlap with data lines. This allows the common electrode blocks to serve as touch electrodes while minimizing the capacitive coupling that would otherwise degrade touch signal quality
Solution Approach 2:
The patent implements local quality by making the common electrode blocks non-uniform - with openings positioned at specific locations where they overlap with data lines. This creates different electrical properties in different regions of the same electrode block, reducing parasitic capacitance where needed while maintaining conductivity where required for touch functionality
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 arrangement significantly reduces parasitic capacitance, enhancing the touch signal-to-noise ratio and overall touch performance of the display panel.
Implementation Method 1
a parasitic capacitance between the common electrode block, when reused as a touch electrode, and the data line is reduced
Data Source
AI summary
A display panel is provided by the present application. The display panel has a display area. The display panel includes a substrate, a first conductive layer and a common electrode layer. The first conductive layer is arranged on a side of the substrate and includes multiple data lines arranged in a first direction, the data lines are arranged in the display area. The common electrode layer is arranged on a side of the first conductive layer and the substrate, and includes multiple common electrode blocks arranged in an array along the first direction and a second direction. The common electrode blocks are located in the display area. Each common electrode block is reused as one touch electrode. At least one of the common electrode blocks includes a first opening. The first direction intersects with the second direction.