Display Panel Fanout Wire Sealing for Moisture Protection
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Solution Overview
Problem
Display screens with narrow bezels suffer from poor sealing properties, allowing moisture to permeate and cause corrosion of internal wires, leading to defects and compromised visual effects.
Innovation Solution
A display panel design featuring a first substrate with fanout wires and a planarization layer, where the sealant overlaps with the fanout wires in a perpendicular direction, forming sparse wire areas and openings to prevent moisture ingress, and a sealant is used to attach the substrates, enhancing sealing without covering the entire step area between the driving chip and display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel of the display screen is narrowed to increase screen-to-body ratio, then the display area is maximized, but the sealing property of the display screen deteriorates
Solution Approach 1:
The patent extends the sealant coverage from the traditional planar sealing region into the step area (vertical dimension) between the driving chip and display area. This three-dimensional sealing approach allows the sealant to cover both the lateral interface between substrates and the vertical step region, achieving effective sealing with narrower bezels without compromising moisture protection
2Reliability
If sealant is applied to cover the entire step area between driving chip and display area, then sealing property is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies sealant selectively to specific regions: the lateral interface between first and second substrates, and the step area between the driving chip and display area. This localized sealing approach focuses protection where moisture ingress is most likely while avoiding unnecessary sealant application in other regions, thereby simplifying the overall sealant structure and manufacturing process
Data Source
AI summary
Provided is a display panel including a first substrate and a second substrate that are opposite to the first substrate and a sealant arranged in the non-display area. The first substrate includes a base substrate, first fanout wires and a planarization layer that are arranged at a side of the base substrate proximate to the second substrate. The first fanout wires are arranged in the non-display area and at a side of the planarization layer facing away from the base substrate. Each first fanout wire includes first to third wires that are connected in sequence. A distance between adjacent second wires is greater than a distance between adjacent first wires, and is greater than a distance between adjacent third wires. The planarization layer is provided with a first opening, and the first opening overlaps with the sealant and a second wire area formed by second wires.