Micro-LED Display Electrode Layout for Low-Resistance Power Routing
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Solution Overview
Problem
Micro-LED display panels face challenges in achieving high luminance and reducing power consumption due to the limitations in the wiring resistance between the light emitting elements and the power lines.
Innovation Solution
The display device incorporates a configuration where the pixel electrodes and contact electrodes are placed between the second organic insulating layer and the resin layer, with the common electrode connected to the cathodes of the light emitting elements and the contact electrodes, and the wiring lines are formed of metal to reduce wiring resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional wiring structures are used in micro-LED display panels, then device complexity is reduced, but wiring resistance increases leading to lower luminance and higher power consumption
Solution Approach 1:
The patent introduces a multi-layer wiring structure with wiring lines arranged in different layers (first wiring lines in one layer, second wiring lines in another layer) to provide alternative current paths. This dimensional arrangement reduces wiring resistance by allowing current to flow through multiple parallel paths rather than being constrained to a single plane, thereby improving luminance and reducing power consumption.
Solution Approach 2:
The wiring structure is segmented into multiple independent wiring lines (first wiring lines and second wiring lines) that can be independently configured and connected. This segmentation allows for optimized current distribution across different regions of the display panel, reducing overall wiring resistance and improving energy efficiency.
2Loss of energy
If wiring lines are arranged in multiple layers, then wiring resistance is reduced, but device complexity increases
Solution Approach 1:
The multi-layer wiring structure serves multiple functions: it reduces wiring resistance, provides flexible routing options for connecting different components (light emitting elements, contact electrodes, common electrode), and enables independent optimization of different wiring regions. This multi-functionality justifies the increased structural complexity by delivering multiple performance benefits simultaneously.
Data Source
AI summary
According to one embodiment, a display device includes pixels each including transistors, pixel electrodes, a contact electrode, and light emitting elements, and an insulating basement, a first organic insulating layer, a second organic insulating layer, a resin layer, a common electrode, and first wiring lines. The common electrode is electrically connected to cathodes of the light emitting elements, and electrically connected to the contact electrodes of the pixels. The first wiring lines, each provided between the first organic insulating layer and the second organic insulating layer or between the second organic insulating layer and the resin layer, are electrically connected to the contact electrodes of the pixels, and are formed of a metal.