OLED Display Panel Touch Wire Width Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current OLED display panels face challenges in enhancing touch control performance, particularly in achieving optimal distances and widths of subpixels and touch wires to improve sensing accuracy and reliability.
Innovation Solution
The display panel design includes a base substrate with a display function layer comprising subpixels arranged in a grid pattern and touch electrodes with intersecting touch wires forming a grid with hollow parts. The distances between subpixels (D1 and D2) and the minimum widths of touch wires (d1 and d2) are optimized such that D1 > D2 and d1 > d2, allowing for increased touch wire widths which reduce resistance and enhance touch signal sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between subpixels is reduced to increase resolution, then the display resolution is improved, but the touch wire width must be reduced which increases resistance and degrades touch sensing performance
Solution Approach 1:
The patent applies local quality by differentiating touch wire widths based on local subpixel spacing. Touch wires connecting subpixels with larger spacing (D1) have greater width (d1), while touch wires connecting subpixels with smaller spacing (D2) have smaller width (d2). This localized adaptation allows the touch electrode structure to optimize both touch sensing performance in wide-spacing regions and display resolution in narrow-spacing regions, resolving the contradiction between these two requirements.
2Reliability
If the touch wire width is increased to reduce resistance and improve touch sensing, then the touch control performance is improved, but the distance between subpixels must be increased which reduces display resolution
Solution Approach 1:
The invention implements local quality by making touch wire widths variable rather than uniform. Specifically, touch wires in regions where subpixel spacing is larger (D1) are made wider (d1) to reduce resistance and improve touch sensing, while touch wires in regions where subpixel spacing is smaller (D2) are made narrower (d2) to preserve display resolution. This spatially differentiated design allows the system to optimize touch performance where needed without compromising overall display quality.
3Ease of manufacture
If uniform touch wire width is used across all subpixel connections, then the manufacturing process is simplified, but the touch sensing performance varies suboptimally across different regions
Solution Approach 1:
The patent applies local quality by designing touch wires with non-uniform widths that adapt to local subpixel spacing requirements. The touch wire connecting subpixels with larger spacing has greater width to reduce resistance, while touch wires connecting subpixels with smaller spacing have smaller width. Although this increases manufacturing complexity compared to uniform width, it significantly improves touch sensing performance by optimizing electrical characteristics for each local region's specific geometry.
Solution Approach 2:
The invention employs parameter changes by varying the touch wire width parameter (from d1 to d2) based on the subpixel spacing parameter (from D1 to D2). This parameter adaptation allows the touch electrode system to maintain optimal electrical performance across regions with different geometric characteristics, improving overall touch sensing reliability while accounting for the increased manufacturing precision requirements.
Data Source
AI summary
Display panel and display device are provided. The display panel includes a base substrate; a display function layer, on a side of the base substrate, the display function layer including a plurality of subpixels arranged in an array along a first direction and a second direction, and the first direction intersects the second direction; and touch electrodes, on a side of the display function layer away from the base substrate, the touch electrodes including a plurality of touch wires intersecting to form a grid with a plurality of hollow parts, a vertical projection of a subpixel of the plurality of subpixels on a plane where the base substrate is located within a vertical projection of a hollow part of the plurality of hollow parts on the plane where the base substrate is located.