Touch Control Electrode Segmentation and Hollowed-Out Regions
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Solution Overview
Problem
Existing touch-control display panels face issues with voltage drop between driving electrodes, affecting touch-control effectiveness, and visibility problems with bridge electrodes under strong light.
Innovation Solution
A touch-control display panel with a touch-control layer located at the light-emitting side, featuring intersecting and insulated first and second touch-control electrodes with hollowed-out regions and dummy electrodes, improving sensitivity and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the touch-control electrode structure uses long driving electrodes arranged vertically, then the display area can be increased, but voltage drop occurs between the first and last driving electrodes, affecting touch-control effectiveness
Solution Approach 1:
The long driving electrode is divided into multiple shorter electrode blocks arranged in series. Each electrode block is connected to adjacent blocks through bridge electrodes, creating a segmented structure that reduces the voltage drop across the entire electrode length while maintaining coverage of the display area.
Solution Approach 2:
The electrode structure transitions from a simple linear arrangement to a two-dimensional grid pattern with electrode blocks arranged in multiple rows and columns. This dimensional change allows voltage distribution to be optimized across both horizontal and vertical directions, reducing the cumulative voltage drop effect.
2Ease of manufacture
If bridge electrodes are used to connect adjacent sensing electrodes, then the electrode structure can be completed, but visibility problems occur under strong light
Solution Approach 1:
The bridge electrodes are designed with localized hollowed-out regions that remove conductive material from specific areas. This creates non-uniform local quality where the electrode provides electrical connection where needed but becomes transparent where light passes through, eliminating visibility issues while maintaining manufacturing functionality.
Solution Approach 2:
The bridge electrodes incorporate hollowed-out regions that create a porous or perforated structure. This allows light to pass through the electrode material, making it invisible under strong light conditions, while the remaining conductive portions maintain the necessary electrical connectivity between sensing electrodes.
3Measurement precision
If the touch-control electrode area is increased to improve sensitivity, then touch detection capability is enhanced, but self-capacitance increases, reducing touch-control sensitivity
Solution Approach 1:
The electrode structure is segmented into multiple electrode blocks with hollowed-out regions, reducing the continuous conductive area. This segmentation maintains the electrode's ability to detect touch events while reducing the overall self-capacitance, thereby improving touch-control sensitivity.
Solution Approach 2:
Hollowed-out regions are strategically positioned within the electrode blocks to reduce self-capacitance in areas where touch detection is less critical, while maintaining full electrode coverage in areas where touch sensitivity is most important. This local quality variation optimizes the balance between detection capability and sensitivity.
Data Source
AI summary
A touch-control display panel is provided, which includes a touch-control layer and a display functional layer, where the touch-control layer includes a plurality of first touch-control electrodes and a plurality of second touch-control electrodes; the first touch-control electrode includes a plurality of first touch-control electrode blocks, each of the first touch-control electrode blocks includes at least one first hollowed-out region and at least one second hollowed-out region, an area of the first hollowed-out region is larger than an area of the second hollowed-out region; and the touch-control layer further includes at least one first dummy electrode and at least one second dummy electrode, where the first dummy electrode is located in the corresponding first hollowed-out region, and the second dummy electrode is located in the corresponding second hollowed-out region.