Curved Touch Panel Sensing Cell Arrangement
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Solution Overview
Problem
Display devices with curved regions experience a higher frequency of touch sensing errors compared to flat regions, leading to reduced touch sensitivity and precision.
Innovation Solution
A touch panel with differently arranged and shaped sensing cells in curved regions, featuring reduced arrangement distances and increased density, along with varying electrical conductivity, to enhance sensing precision and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensing cells are arranged with uniform spacing in curved regions, then manufacturing is simplified, but touch sensing precision deteriorates due to increased error occurrence frequency
Solution Approach 1:
The patent applies local quality by differentiating the sensing cell arrangement in curved regions from flat regions. Specifically, sensing cells in curved regions are arranged with non-uniform spacing where the distance between adjacent sensing cells varies based on the curvature radius, while flat regions maintain uniform spacing. This localized adaptation improves touch sensing precision in curved areas without compromising manufacturing feasibility elsewhere.
Solution Approach 2:
The patent changes the arrangement parameters of sensing cells in curved regions by adjusting the spacing between adjacent cells based on the curvature radius. The spacing is calculated to compensate for the geometric distortion caused by curvature, ensuring that the sensing resolution remains consistent across both flat and curved surfaces. This parameter adjustment directly addresses the increased error frequency in curved regions.
2Measurement precision
If sensing cell density is increased in curved regions, then touch sensitivity improves, but device complexity increases
Solution Approach 1:
The patent implements local quality by concentrating higher sensing cell density specifically in curved regions where touch sensing errors are more frequent, while maintaining standard density in flat regions. This selective densification improves touch sensitivity in problematic areas without unnecessarily increasing device complexity across the entire display surface.
Solution Approach 2:
The patent segments the display surface into flat regions and curved regions, applying different sensing cell arrangements to each segment. Curved regions receive enhanced attention with adjusted spacing and potentially different sensing cell configurations, while flat regions use standard arrangements. This segmentation allows targeted improvement of touch sensitivity without global complexity increase.
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
A curved touch panel and a display device including the same are provided. The touch panel includes a flat region in which first sensing cells are arranged; and a curved region in which second sensing cells are arranged that are different from the first sensing cells in terms of at least one of an arrangement pattern and a shape.