Adhesive Layer Thickness Control for Display Pad Short Circuit Prevention
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Solution Overview
Problem
The thickness of the adhesive layer in display devices can compromise the reliability of electrical connections, leading to undesirable short circuits between components.
Innovation Solution
The adhesive layer is designed with a thickness greater than 0.5 to 2.0 times the diameter of conductive particles, preventing the flow of conductive particles and minimizing short-circuiting between adjacent pads, thereby enhancing the overall reliability of the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adhesive layer thickness is increased, then the reliability of electrical connections is improved, but the risk of conductive particle flow and short circuits increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the adhesive layer thickness to be 0.5 to 2.0 times the conductive particle diameter. This specific thickness range prevents conductive particle flow while maintaining reliable electrical connections, resolving the contradiction between connection reliability and short circuit risk.
Solution Approach 2:
The patent uses dynamics by arranging conductive groups in specific patterns (linear, grid, or radial) and controlling their distribution within the adhesive layer. This dynamic arrangement ensures electrical connectivity while preventing particle migration that could cause short circuits.
2Object-affected harmful factors
If the adhesive layer thickness is decreased, then the risk of conductive particle flow is reduced, but the reliability of electrical connections deteriorates
Solution Approach 1:
The patent applies parameter changes by setting the adhesive layer thickness to a minimum of 0.5 times the conductive particle diameter. This ensures the layer is thick enough to prevent particle flow while maintaining electrical connectivity, resolving the contradiction between preventing particle flow and ensuring connection reliability.
Solution Approach 2:
The patent segments the adhesive layer into multiple conductive groups arranged in specific patterns. This segmentation allows the layer to be thin enough to prevent particle flow while maintaining electrical connectivity through the distributed conductive groups.
3Reliability
If conductive particles are densely distributed, then electrical conductivity is improved, but the risk of short circuits between adjacent pads increases
Solution Approach 1:
The patent segments conductive particles into discrete conductive groups arranged in specific patterns (linear, grid, or radial). This segmentation provides electrical conductivity through the groups while the spacing between groups prevents short circuits between adjacent pads.
Solution Approach 2:
The patent applies local quality by varying the density and arrangement of conductive groups in different regions. Conductive groups are arranged to provide adequate conductivity where needed while maintaining spacing to prevent short circuits, resolving the contradiction between conductivity and short circuit risk.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the driving reliability of the display device by preventing conductive particle flow and reducing short-circuiting, ensuring stable connections between electronic components and the display panel.
Implementation Method 1
an adhesive layer disposed between the first and second layers and including and a plurality of conductive groups spaced apart from each other in the first direction and distributed along a second direction generally perpendicular to the first direction
Data Source
AI summary
According to one aspect of the invention, a display device includes: a first layer having a display area and a non-display area adjacent thereto, the first layer including first and second pads overlapping the non-display area and spaced apart from each other in a first direction; a second layer including third and fourth pads that respectively face the first and second pads in a thickness direction of the first layer; and an adhesive layer disposed between the first and second layers and including and a plurality of conductive groups spaced apart from each other in the first direction and distributed along a second direction generally perpendicular to the first direction, wherein the conductive groups comprise conductive particles arranged in the second direction, and the adhesive layer has a thickness greater than about 0.5 times to about 2.0 times a diameter of the conductive particles.