Pixel Array Substrate Bridge Portion Touch Signal Routing
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Solution Overview
Problem
The challenge lies in integrating a touch electrode into a pixel array substrate while maintaining good electrical properties and touch functionality, which is difficult to achieve in current touch display panels.
Innovation Solution
A pixel array substrate design that includes a substrate, touch signal lines, pixel structures, data lines, connection patterns, and a touch electrode, where the touch signal line has a bridge portion that crosses over connection patterns to ensure electrical connectivity and reduce capacitive coupling effects, allowing for both effective electrical performance and touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the touch electrode is integrated into the pixel array substrate to make the touch display panel thin, then the thickness of the touch display panel is reduced, but the electrical properties and touch function cannot be simultaneously optimized
Solution Approach 1:
The touch signal line is divided into multiple segments (first touch signal line, second touch signal line, bridge portion) that are spatially separated and connected through the bridge portion. This segmentation allows each segment to be independently optimized for its specific function while maintaining overall electrical performance and touch sensitivity.
Solution Approach 2:
The bridge portion of the touch signal line crosses over the connection patterns in a different spatial layer or plane, transitioning from a two-dimensional layout to a three-dimensional structure. This dimensional change allows the touch signal line to maintain electrical connectivity while avoiding interference with the connection patterns below, thus preserving both electrical properties and touch function in a thin profile.
2Volume of moving object
If the touch signal line is placed close to pixel structures to maintain thinness, then the overall panel thickness is reduced, but capacitive coupling effects increase
Solution Approach 1:
The bridge portion acts as an intermediary structure that connects the first and second portions of the touch signal line while being positioned to cross over the connection patterns. This intermediary configuration minimizes direct proximity between the touch signal line and data lines, reducing capacitive coupling effects while maintaining the thin panel structure.
3Adaptability or versatility
If the touch signal line crosses over connection patterns, then touch functionality is enabled, but electrical connectivity may be compromised
Solution Approach 1:
The bridge portion transitions the touch signal line to a different spatial dimension or layer to cross over the connection patterns. This three-dimensional routing maintains electrical connectivity by avoiding direct intersection with the connection patterns, while still enabling the touch signal line to span across the pixel array for touch functionality.
Data Source
AI summary
A pixel array substrate includes a first touch signal line having a first and second portion and a bridge portion, pixel structures including a first and second pixel structure, a first and second data line, a first and second connection pattern, and a touch electrode. The first pixel structure and the second pixel structure are respectively located on a first and second side of the first touch signal line. The first data line and the second data line are respectively located on the second and first sides of the first touch signal line. The first connection pattern is electrically connected to the first data line and the first pixel structure. The second connection pattern is electrically connected to the second data line and the second pixel structure. The bridge portion of the first touch signal line crosses over the first connection pattern and the second connection pattern.