Display Panel Conducting Ring Crack Isolation
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Solution Overview
Problem
Existing display panels face issues with cracks at the cut edges of the silicon substrate and encapsulation layer during the manufacturing process, which can extend inward and damage the electrical performance of the light emitting device.
Innovation Solution
The display panel incorporates a driving baseplate with a conducting ring and an isolation dam in the peripheral area, which overlaps with the conducting ring, and an encapsulation layer covering the light emitting device and isolation dam, effectively blocking crack extension from the cut edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the silicon substrate and encapsulation layer are cut during manufacturing, then the display panel can be separated into individual units, but cracks occur at the cut edges and can extend inward damaging the light emitting device
Solution Approach 1:
The patent introduces a conducting ring as an intermediary element positioned between the cut edge and the light emitting device. This conducting ring acts as a mediator that intercepts and blocks crack propagation from the cut edge, preventing cracks from reaching the light emitting device while allowing the manufacturing process to proceed normally.
Solution Approach 2:
The conducting ring is formed on the substrate before the encapsulation layer is applied and before the final cutting process. This preliminary positioning of the conducting ring ensures that when cutting occurs, the conducting ring is already in place to block any potential crack extension toward the light emitting device, addressing the reliability issue before the harmful effect can occur.
2Reliability
If the conducting ring is positioned close to the light emitting device to block cracks, then electrical reliability improves, but the risk of the conducting ring interfering with device operation increases
Solution Approach 1:
The conducting ring is positioned in a specific location within the peripheral area of the substrate, at a carefully controlled distance from the light emitting device. This local positioning ensures the ring is close enough to effectively block cracks but far enough to avoid interfering with the electromagnetic fields or operation of the light emitting device, creating an optimal balance between protection and non-interference.
3Reliability
If the peripheral area is reduced to minimize crack propagation paths, then device reliability improves, but the space available for conducting ring placement and other functional elements decreases
Solution Approach 1:
The conducting ring is positioned in the peripheral area at a specific distance from the light emitting device, utilizing the spatial dimension effectively. By optimizing the radial distance of the conducting ring from the center, the patent maximizes the protective function within the available peripheral area, ensuring adequate space for both the conducting ring and other functional elements while maintaining reliability.
Data Source
AI summary
A display panel and a driving baseplate, relate to the technical field of displaying. The display panel includes an active area and a peripheral area located on at least one side of the active area, and the display panel includes: a driving baseplate, including a substrate and a conducting ring embedded on a surface of one side of the substrate, wherein the conducting ring is located in the peripheral area; a light emitting device, located in the active area and disposed on a side of the driving baseplate close to the conducting ring; an isolation dam, located in the peripheral area and disposed on a side of the conducting ring away from the substrate, wherein the isolation dam overlaps with the conducting ring; and an encapsulation layer, disposed on sides of the light emitting device and the isolation dam away from the substrate.