Touch Display Panel Variable Width Signal Lines Aperture Ratio
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Solution Overview
Problem
As touch display devices increase in size, the number of touch wires increases, leading to a decrease in aperture ratio, which affects display quality and touch sensitivity.
Innovation Solution
The touch display panel is divided into two areas with different width touch signal lines, where thinner lines are used closer to the binding area to minimize light shielding and thicker lines are used further away to ensure touch sensitivity, thereby increasing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of touch wires is increased to support larger display sizes, then the coverage area increases, but the aperture ratio decreases
Solution Approach 1:
The patent applies local quality by differentiating the width of touch signal lines based on their position relative to the binding area. Second touch signal lines (closer to binding area) have a first width, while first touch signal lines (farther from binding area) have a second width that is not less than the first width. This localized variation optimizes both aperture ratio near the binding area and touch sensitivity in the display area, resolving the contradiction between coverage area and aperture ratio.
2Ease of manufacture
If uniform width touch signal lines are used throughout the display area, then manufacturing is simplified, but touch sensitivity varies across the display area
Solution Approach 1:
The patent implements local quality by specifying different widths for touch signal lines in different regions. The second touch signal lines near the binding area have a smaller width (first width), while the first touch signal lines in the display area have a larger width (second width ≥ first width). This ensures adequate touch sensitivity in the display area while maintaining reasonable aperture ratio near the binding area, achieving both manufacturing feasibility and performance requirements.
Data Source
AI summary
A touch display panel and a touch display device. The touch display panel includes a first display area, a second display area and a binding area arranged along a first direction, and a touch bonding pad is arranged in the binding area and is configured to input touch driving signals; a plurality of touch electrodes are arranged in each of the first display area and the second display area; the touch display panel further includes a plurality of touch signal lines extending along the first direction and arranged at intervals along a second direction, the touch bonding pad is electrically connected to the touch electrodes by the touch signal lines; and touch signal lines electrically connected to the touch electrodes in the first display area are first touch signal lines, touch signal lines electrically connected to the touch electrodes in the second display area are second touch signal lines.