Display Electrode Connection Layout for Low Contact Resistance
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Solution Overview
Problem
Display devices face issues with luminance deterioration and dark spot generation due to high contact resistance between electrodes and conductive layers, which affects the performance and longevity of the display.
Innovation Solution
The implementation of direct connections between connection electrodes and a third conductive layer, as well as the use of bridge layers to reduce contact resistance, thereby preventing or minimizing luminance deterioration and dark spot formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection electrodes are indirectly connected to conductive layers through intermediate layers, then device complexity is reduced and manufacturing is easier, but contact resistance increases causing luminance deterioration and dark spots
Solution Approach 1:
The patent removes the intermediate bridge layer from the connection structure, allowing connection electrodes to directly contact the third conductive layer. This extraction of the unnecessary intermediate component reduces contact resistance and eliminates luminance deterioration while maintaining manufacturing feasibility through direct patterning processes.
Solution Approach 2:
The patent segments the connection structure into distinct functional zones: connection electrodes directly contacting the third conductive layer in non-emission areas, while emission areas remain isolated. This segmentation allows optimized electrical connection without compromising display quality or requiring complex multi-layer bridge structures.
2Illumination intensity
If contact resistance between electrodes and conductive layers is high, then manufacturing process is simpler, but luminance deterioration and dark spots occur
Solution Approach 1:
The patent uses the third conductive layer as a direct intermediary medium between connection electrodes and the underlying conductive structure. By establishing direct contact through this conductive layer without additional bridge materials, the patent achieves low contact resistance and stable luminance while maintaining manufacturing simplicity.
Data Source
AI summary
A display device includes conductive layers on a substrate, a via layer on the conductive layers, a first electrode and a second electrode extending in one direction on the via layer and spaced from each other, a first insulating layer on the first electrode and the second electrode, a plurality of light emitting elements on the first insulating layer, each of the light emitting elements having one end on the first electrode and an other end on the second electrode, and a first connection electrode and a second connection electrode on the first insulating layer, the first connection electrode overlapping the first electrode, and the second connection electrode overlapping the second electrode, wherein the first connection electrode and the second connection electrode are in contact with the conductive layers through contact portions.