Display Panel Signal Line Layout for Low-Coupling Touch Sensing
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Solution Overview
Problem
Existing display panels with embedded touch technology face issues of signal coupling between adjacent wirings, which affect display and touch accuracy, and require high process accuracy due to close spacing of wirings.
Innovation Solution
The display panel design includes first and second signal lines that intersect and are insulated, with some overlapping with pixel opening areas and gaps, increasing distance between adjacent signal lines and ensuring uniform pixel electrode widths, thereby reducing coupling interference and improving signal accuracy and display resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all first signal lines overlap with gaps between pixel opening areas, then signal coupling between adjacent wirings is reduced, but the area occupied by gaps increases, reducing display resolution
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of first signal lines into two groups: some overlap with pixel opening areas while others overlap with gaps between pixel opening areas. This localized differentiation allows the patent to reduce signal coupling in specific regions without uniformly increasing gap areas across the entire display panel, thereby maintaining display resolution while reducing harmful signal coupling effects.
2Object-affected harmful factors
If distance between adjacent first signal lines is increased, then coupling interference is reduced and short circuit risk is avoided, but the area occupied by signal lines increases, reducing display resolution
Solution Approach 1:
The patent resolves the area conflict by utilizing the thickness dimension (Z-direction) of the display panel. First signal lines are arranged at different positions along the second direction and overlap with pixel opening areas in the thickness direction, allowing adequate horizontal spacing to reduce coupling interference without proportionally increasing the planar area occupied by signal lines, thus preserving display resolution.
3Length of moving object
If first signal lines are arranged to overlap with pixel opening areas, then distance between adjacent first signal lines is increased, but the width of pixel electrodes may become non-uniform, affecting display quality
Solution Approach 1:
The patent applies parameter changes by controlling the width of the first signal line to be less than or equal to the width of the pixel opening area it overlaps. This parameter constraint ensures that when first signal lines overlap with pixel opening areas, they do not excessively encroach on pixel electrode space, allowing pixel electrode widths to remain substantially uniform across different regions while still achieving increased spacing between adjacent first signal lines.
Data Source
AI summary
Embodiments of the present application provides a display panel and a display apparatus, the display panel comprising a plurality of first signal lines and a plurality of second signal lines, the second signal line and part of the first signal lines being insulated and crossed to define a plurality of pixel opening areas; part of the first signal lines overlapping with the pixel opening area along a thickness direction of the display panel to decrease a distance between two adjacent ones of the first signal lines and reduce the coupling interference, while reducing a shortcut between two adjacent ones of the first signal lines; the display panel further comprising a first pixel electrode overlapping with the first signal line in the thickness direction of the display panel; a width D1 of the first pixel electrode and a width D2 of any other pixel electrode satisfying |D1−D2/D1≤20% along the second direction.