Display Electrode Bridge Structure for Low-Resistance Flexible Panels
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Solution Overview
Problem
Existing display devices face challenges in connecting auxiliary electrodes to counter electrodes efficiently, leading to voltage drops and potential malfunctions, particularly in flexible and foldable displays.
Innovation Solution
A method involving the formation of a bridge portion using silver, aluminum, or copper to connect auxiliary electrodes to counter electrodes, with the use of an inkjet printing technique to apply an etchant or metal ink, ensuring a robust and efficient electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connection methods are used to connect auxiliary electrode to counter electrode, then the structure is simple, but voltage drop occurs and electrical connection reliability deteriorates
Solution Approach 1:
The patent introduces a bridge portion as an intermediary element to connect the auxiliary electrode to the counter electrode. This bridge portion penetrates the auxiliary layer and provides a direct electrical connection path, eliminating voltage drop issues while maintaining structural organization through its specific positioning and connection function.
Solution Approach 2:
The bridge portion extends in the vertical dimension by penetrating through the auxiliary layer from the first electrode side to the counter electrode side. This three-dimensional connection approach resolves the electrical connection reliability issue by creating a direct conductive path through multiple layers, rather than relying on planar connections that cause voltage drop.
2Adaptability or versatility
If flexible and foldable display structures are implemented, then adaptability is improved, but electrical connection stability deteriorates due to bending stress
Solution Approach 1:
The bridge portion creates a vertical connection path through the auxiliary layer, distributing mechanical stress across multiple dimensions. This three-dimensional connection structure maintains electrical stability during bending by avoiding concentrated stress points that would occur with planar connections in flexible display applications.
3Manufacturing precision
If inkjet printing method is used to form bridge portion, then manufacturing precision is improved, but production time increases
Solution Approach 1:
The patent replaces conventional mechanical patterning methods with inkjet printing technology to form the bridge portion. This allows for precise material deposition and positioning without complex mechanical alignment systems, achieving high manufacturing precision while maintaining reasonable production efficiency through direct digital writing.
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
The solution effectively prevents voltage drops in counter electrodes, enhancing the performance and longevity of flexible and foldable displays by reducing resistance and ensuring clear image quality.
Implementation Method 1
A method involving the formation of a bridge portion using silver, aluminum, or copper to connect auxiliary electrodes to counter electrodes, with the use of an inkjet printing technique to apply an etchant or metal ink
Implementation Method 2
removing the auxiliary layer arranged on the auxiliary electrode by supplying an etchant, in an inkjet printing method, to the auxiliary layer arranged on the auxiliary electrode. The etchant may include hydrogen peroxide and/or sulfuric acid
Data Source
AI summary
A display device and a method of manufacturing the display device. An auxiliary electrode may be connected to a counter electrode without damaging a light-emitting element because a laser is not used.