Bridge Electrode Layout for Low-Resistance LED Display Pixels
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Solution Overview
Problem
Existing display devices face challenges in reducing contact resistance between electrodes, which can lead to pixel dark spots and affect display performance.
Innovation Solution
The display device incorporates bridge electrodes that electrically connect different electrodes, reducing contact resistance. This is achieved by designing a structure where the first electrode directly contacts the first bridge electrode and is separated from the first connection electrode, and similarly, the second electrode directly contacts the second bridge electrode and is separated from the second connection electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are directly connected to reduce contact resistance, then electrical conductivity is improved, but device complexity increases due to additional bridge electrodes and connection structures
Solution Approach 1:
The patent introduces bridge electrodes as intermediary elements that connect the first and second electrodes to the connection electrodes. Instead of directly connecting the electrodes, the bridge electrodes serve as mediators, reducing contact resistance while maintaining a manageable structural complexity through systematic placement and integration with the insulating layer structure.
2Reliability
If bridge electrodes are added to reduce contact resistance, then display performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the bridge electrodes with the insulating layer structure, where the insulating layer is configured to expose specific regions of the bridge electrodes. This integration allows the bridge electrodes to be formed as part of the same manufacturing process sequence, reducing the number of discrete manufacturing steps and simplifying the overall fabrication process while maintaining the performance benefits.
Data Source
AI summary
A display device includes a substrate, first and second bridge electrodes on the substrate and spaced apart from each other, a first electrode on the first bridge electrode, a second electrode on the second bridge electrode and spaced apart from the first electrode, a first insulating layer on the first electrode and the second electrode, a light emitting element on the first insulating layer, and on the first electrode and the second electrode, a first connection electrode on the first electrode, and contacting the light emitting element and the first bridge electrode, and a second connection electrode on the second electrode, and contacting the light emitting element and the second bridge electrode, wherein the first electrode directly contacts the first bridge electrode, and is separated from the first connection electrode, and wherein the second electrode directly contacts the second bridge electrode, and is separated from the second connection electrode.