Display Substrate Touch Line Layout Around a Blocking Dam
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Solution Overview
Problem
The existing design of touch signal lines in flexible multi-layer on cell (FMLOC) technology limits the ability to narrow the bezel width due to the arrangement of routing wires between the blocking dam and the display region, hindering the development of thinner display screens.
Innovation Solution
The display substrate design includes touch signal lines with first and second routing wires arranged on inner and outer sides of the blocking dam, utilizing the space on the outer side effectively, and incorporating a groove to prevent water and oxygen ingress, with additional routing wires striding over the dam for connection to external circuits, allowing for a narrower frame region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch signal lines are arranged between the blocking dam and the display region, then the touch function can be integrated, but the bezel width cannot be narrowed
Solution Approach 1:
The patent transitions from a single-layer routing arrangement to a multi-layer spatial configuration. Touch signal lines are divided into first routing wires positioned between the blocking dam and display region, and second routing wires positioned on the outer side of the blocking dam. This multi-dimensional spatial arrangement allows touch signal lines to be routed through multiple layers and positions, effectively utilizing the frame region space and enabling bezel narrowing while maintaining touch functionality.
Solution Approach 2:
The touch signal lines are segmented into different groups with distinct routing paths. First routing wires handle certain signal connections between the blocking dam and display region, while second routing wires handle other connections on the outer side of the blocking dam. This segmentation allows independent optimization of each routing path, enabling the bezel width to be narrowed while ensuring complete touch signal transmission.
2Reliability
If routing wires are arranged in the frame region, then touch signal transmission is enabled, but the space utilization is insufficient
Solution Approach 1:
The patent utilizes multiple spatial dimensions within the frame region by positioning routing wires at different locations relative to the blocking dam. First routing wires are arranged between the blocking dam and display region, while second routing wires are arranged on the outer side of the blocking dam. This multi-dimensional arrangement maximizes space utilization in the frame region while ensuring reliable signal transmission for touch functionality.
3Length of stationary object
If the frame region is reduced for narrower bezel, then the display appearance is improved, but the connection reliability may be affected
Solution Approach 1:
The patent segments touch signal lines into multiple routing paths (first routing wires and second routing wires) with different positions and functions. This segmentation provides redundant connection paths, ensuring that even if the frame region is reduced, the touch signal transmission remains reliable through the distributed routing architecture.
Solution Approach 2:
The patent optimizes the electrical parameters of the routing wires by controlling their lengths and arrangements. First routing wires have one length configuration while second routing wires have another, allowing the overall signal transmission parameters to be optimized for reliability while maintaining the narrowed bezel design.
Data Source
AI summary
Disclosed are a display substrate and a display device. The display substrate includes a base substrate which includes a display region and a frame region surrounding the display region; at least one circle of blocking dam arranged around the display region in the frame region; and a touch metal layer located on the side, away from the base substrate, of the layer where the blocking dam is located; the touch metal layer includes a plurality of touch electrodes and a plurality of touch signal lines electrically connected to the plurality of touch electrodes, wherein the plurality of touch electrodes are at least partially located in the display region, and the plurality of touch signal lines are located in the frame region; the plurality of touch signal lines include: a plurality of first wirings and a plurality of second wirings arranged in parallel in a first direction.