Touch Electrode Compensation for In-Screen Hole-Digging
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Solution Overview
Problem
The integration of touch technology with display panels that use in-screen hole-digging technology for hardware placement compromises the uniformity and performance of touch performance, particularly due to notched contours of touch electrodes which reduce mutual capacitance values and tolerance, leading to poor touch performance in areas like edges, corners, and mounting holes.
Innovation Solution
A touch structure with a first region of touch electrodes having flawless contours and a second region with notched contours, where the boundaries of these regions include compensation structures such as protrusions and grooves to form polyline compensation boundary lines, increasing the length and contact area between adjacent electrodes, thereby enhancing mutual capacitance and tolerance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If in-screen hole-digging technology is used to place hardware, then screen-to-body ratio is increased, but touch performance uniformity deteriorates
Solution Approach 1:
The patent applies different contour designs to touch electrodes in different regions: electrodes in the first region (away from hole-digging areas) have flawless contours, while electrodes in the second region (near hole-digging areas) have notched contours. This local differentiation allows the structure to adapt to local requirements, maintaining screen-to-body ratio while compensating for touch performance variations in different areas.
2Adaptability or versatility
If touch electrodes have notched contours due to hole-digging areas, then hardware placement is enabled, but mutual capacitance values decrease
Solution Approach 1:
The patent introduces compensation structures (protrusions and grooves) on the boundaries of touch electrodes with notched contours. These structures increase the boundary length and contact area between adjacent electrodes, thereby compensating for the reduced mutual capacitance caused by the notched contours. The compensation structures effectively adjust the electrical parameters to maintain touch sensitivity despite the geometric modifications required for hardware placement.
3Adaptability or versatility
If touch electrodes have notched contours, then hole-digging areas are accommodated, but touch performance in edges and corners deteriorates
Solution Approach 1:
The patent divides the touch electrode structure into multiple segments: the main electrode body with notched contours to accommodate hole-digging areas, and additional compensation structures (protrusions and grooves) on the boundaries. This segmentation allows the electrode to simultaneously achieve hardware accommodation and maintain touch performance by distributing different functions to different parts of the structure.
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 compensation structure ensures that the mutual capacitance and tolerance values of touch electrodes with notched contours are consistent with those of flawless contours, significantly improving touch performance and uniformity across the display panel, especially in areas with compromised electrode shapes.
Implementation Method 1
a length of the compensation boundary line being greater than a length of a reference boundary line... enhancing mutual capacitance and tolerance values
Data Source
AI summary
A touch structure and a touch display panel are provided. The touch structure includes a first region and a second region. Touch electrodes of the first region are touch electrodes with a flawless contour and touch electrodes of the second region are touch electrodes with a notched contour. The touch electrodes of the first region include first boundary electrodes, and the touch electrodes of the second region include second boundary electrodes. The first boundary electrode includes a first side and the second boundary electrode includes a second side. The first side and the second side are provided with a compensation structure which is configured to form a compensation boundary line between the first side and the second side and the length of the compensation boundary line is greater than the length of a reference boundary line.