Display Panel Wiring Layout With Overlapped Data and Touch Lines
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Solution Overview
Problem
The development of a wiring structure design that can further reduce the area of the peripheral region of electronic devices, particularly in display panels, is a key challenge due to the configuration of the fan-out area in the peripheral region.
Innovation Solution
The electronic device incorporates a specific wiring arrangement where data lines and touch signal lines are rearranged and partially overlapped, with pads arranged in non-horizontal manners, allowing for efficient space utilization and reducing the area of the wiring configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the wiring configuration in the peripheral region is optimized to reduce the area of the peripheral region, then the area of the peripheral region is reduced, but the wiring complexity increases
Solution Approach 1:
The patent applies dimensionality change by arranging data lines and touch signal lines in overlapping configurations across different layers or spatial dimensions. Instead of routing all wires in separate planar regions, the invention utilizes vertical stacking and overlapping paths, allowing wires to share horizontal space while maintaining electrical isolation through different layers or insulation structures. This reduces the horizontal footprint of the peripheral region while managing wiring complexity through structured multi-dimensional routing.
Solution Approach 2:
The patent merges the routing paths of data lines and touch signal lines by allowing them to overlap and share common spatial corridors in the peripheral region. Instead of providing separate dedicated pathways for each wire type, the invention combines their routes, having them traverse overlapping regions and share infrastructure such as bonding pads and interconnect structures. This merging strategy reduces the total area required for wiring while maintaining functional separation through layering or timing multiplexing.
2Area of stationary object
If data lines and touch signal lines are arranged to overlap, then the peripheral region area is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the overlapping wiring structure into distinct functional layers or routing zones. Data lines and touch signal lines are divided into separate segments that overlap in controlled regions rather than continuously throughout their entire length. This segmentation allows for localized overlap management, where precise alignment is only critical in specific bonding or interconnect regions, while other portions can tolerate greater manufacturing variation. The segmented approach reduces overall manufacturing precision requirements compared to continuous overlapping.
Solution Approach 2:
The patent introduces intermediary structures such as bonding pads, via holes, or insulation layers that mediate the connection and alignment between overlapping data lines and touch signal lines. These intermediary elements serve as reference features and transition zones that accommodate manufacturing tolerances. The intermediaries provide mechanical and electrical coupling while absorbing alignment variations, thereby reducing the stringency of direct wire-to-wire alignment precision requirements in the overlapping regions.
Data Source
AI summary
An electronic device is provided. The electronic device includes a substrate, a plurality of first pads, a plurality of second pads, a first data line and a touch signal line. The substrate has a first bonding area and a second bonding area. The first pads are disposed in the first bonding area and arranged along a first direction. The second pads are disposed in the second bonding area and arranged along a second direction. There is an included angle between the first direction and the second direction. The first data line is disposed on the substrate and electrically connected to at least one of the first pads or the second pads. The touch signal line is disposed on the substrate and electrically connected to at least another one of the first pads or the second pads. The first data line at least partially overlaps the touch signal line.