Micro LED Display Panel Transparent Metal Conductive Patterns
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Solution Overview
Problem
Current micro light emitting diode display panels face limitations in light transmittance and conductivity due to the use of indium tin oxide electrodes, which are not resistant to high-temperature annealing, restricting the improvement of these properties.
Innovation Solution
The micro light emitting diode display panel incorporates alternately arranged transparent and metal conductive patterns, with the metal conductive patterns electrically bridging the transparent conductive patterns, and an insulating layer with openings to enhance light transmittance and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If indium tin oxide (ITO) is used as the common electrode material, then light transmittance and stability are improved, but high-temperature annealing cannot be performed, limiting conductivity improvement
Solution Approach 1:
The common electrode is segmented into multiple independent transparent conductive patterns instead of a continuous ITO layer. This segmentation allows each pattern to be independently formed at lower temperatures while maintaining overall electrode functionality and light transmittance.
Solution Approach 2:
The patent uses transparent conductive oxide materials (such as ITO, IZO, or AZO) that can be deposited at low temperatures while providing both transparency and conductivity. This composite approach replaces traditional metal electrodes with materials that satisfy both optical and electrical requirements.
2Illumination intensity
If transparent conductive patterns are separated to increase light transmittance, then overall light transmittance is improved, but electrical conductivity between patterns deteriorates
Solution Approach 1:
The patent introduces pad electrodes as intermediary connection points between separated transparent conductive patterns. These pads serve as mediators that maintain electrical continuity while allowing the main conductive patterns to remain separated for optimal light transmittance.
Solution Approach 2:
The patent adds a vertical dimension to the electrode structure by using multi-layer transparent conductive patterns connected through pad electrodes. This three-dimensional arrangement allows light to pass through gaps in the patterns while maintaining electrical connectivity through vertical connections.
Data Source
AI summary
A micro light emitting diode display panel is provided, which includes a substrate, a plurality of first signal lines, a plurality of transparent conductive patterns, a plurality of metal conductive patterns, a plurality of first pads, a plurality of second pads, and a plurality of micro light emitting diode devices. The first signal lines are disposed on the substrate. The transparent conductive patterns are separately distributed on the substrate. The metal conductive patterns and the transparent conductive patterns are alternately arranged on the substrate. The metal conductive patterns are electrically connected between the transparent conductive patterns. The first pads are respectively connected to the first signal lines. The second pads are electrically connected to the transparent conductive patterns. Each of the micro light emitting diode devices is electrically bonded to one of the first pads and one of the second pads.