Display Panel Pad Protrusions for Short Circuit Prevention
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Solution Overview
Problem
Conventional display panels face a high short circuit occurrence rate in their pad units due to adjacent pads being electrically connected, which affects their reliability and performance.
Innovation Solution
A display panel design featuring a substrate with a first conductive layer having a main part and protrusions, where the conductive layer is structured to prevent short circuits by having a multi-layered structure and protrusions that are strategically shaped and positioned to ensure proper electrical connections without adjacent layer overlap, and an insulating layer is used to manage contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adjacent pads are electrically connected to receive image information, then the display panel can function properly, but short circuits occur between adjacent pads
Solution Approach 1:
The first conductive layer is divided into a main part and multiple protrusions, where each protrusion is separated from adjacent pads by insulating layers. This segmentation allows electrical connection functionality while preventing short circuits between adjacent pads through the insulating barrier.
Solution Approach 2:
An insulating layer is introduced as an intermediary between the protrusions of the first conductive layer and adjacent pads. This insulating layer acts as a mediator that enables electrical connection through the protrusions while preventing direct electrical contact and short circuits between adjacent conductive elements.
2Reliability
If the conductive layer has a multi-layered structure with protrusions, then short circuits are prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The insulating layer is formed in advance before the protrusions are created. This preliminary action simplifies the manufacturing process by establishing the protective barrier before the complex protrusion structure is formed, making the overall process more manageable despite the multi-layered structure.
Solution Approach 2:
The insulating layer is selectively applied only in specific regions where short circuit prevention is needed, rather than uniformly across the entire conductive layer. This local quality approach reduces material usage and simplifies the manufacturing process while maintaining electrical connection stability where required.
3Ease of operation
If the entire upper surface of the conductive layer is exposed, then electrical connections to external pads are improved, but susceptibility to short circuits increases
Solution Approach 1:
The conductive layer is extended vertically through protrusions that penetrate through the insulating layer, creating a three-dimensional structure. This dimensional change allows electrical connections to be made at the exposed upper surface while the insulating layer provides protection against short circuits in the horizontal plane.
Solution Approach 2:
The conductive layer structure is made asymmetric with protrusions extending in specific directions toward external pads while insulating layers provide protection in other directions. This asymmetric design optimizes electrical connection ease while maintaining short circuit prevention where most critical.
Data Source
AI summary
A display panel includes: a substrate including a display area and a peripheral area outside the display area; and a first conductive layer in the peripheral area, an entire upper surface of which is exposed to an outside of the display device. The first conductive layer includes a main part and a plurality of protrusions protruding from the main part in a direction parallel to an upper surface of the substrate.