Input Sensor Transmission Line Stack for Impact-Resistant Displays
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Solution Overview
Problem
Display devices face reduced reliability due to damage from external impact, external impurities, and high temperatures affecting the input sensor components.
Innovation Solution
A display device with a multilayer transmission line structure comprising MoNb, AlNd, and ITO materials, where each layer is designed to enhance reliability against external impact, impurities, and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer transmission line structure is used, then the device complexity is low, but the reliability against external impact, impurities, and high temperatures is reduced
Solution Approach 1:
The transmission line uses a composite structure with multiple material layers (MoNb, AlNd, ITO) stacked together. Each material layer provides specific properties: MoNb for mechanical strength and thermal stability, AlNd for electrical conductivity, and ITO for transparency and flexibility. This composite material approach resolves the contradiction by combining the advantages of different materials to achieve high reliability without excessive complexity.
Solution Approach 2:
The patent transitions from a single-layer transmission line to a multi-layer transmission line structure, adding the dimension of layering. This dimensional change allows the transmission line to simultaneously achieve mechanical robustness, electrical conductivity, and thermal resistance, thereby improving reliability while managing complexity through systematic layer organization.
2Strength
If the transmission line uses simple materials, then the manufacturing process is simple, but the resistance to external impact and high temperatures is insufficient
Solution Approach 1:
The transmission line employs composite materials with specific functional assignments: MoNb provides mechanical strength and thermal stability, AlNd ensures electrical conductivity, and ITO contributes transparency and flexibility. This composite approach achieves high strength and temperature resistance while maintaining manufacturability through established thin-film deposition processes for each layer.
3Object-affected harmful factors
If the transmission line is made more robust against external factors, then the reliability improves, but the device complexity increases
Solution Approach 1:
The multi-layer transmission line structure addresses resistance to external factors by assigning specific protective functions to each layer: MoNb resists thermal damage and mechanical impact, AlNd maintains electrical conductivity under stress, and ITO provides flexibility and environmental barrier. This systematic material composition achieves comprehensive protection while managing complexity through functional differentiation.
Data Source
AI summary
A display device includes a display panel including sub-pixels, and an input sensor on the display panel. The input sensor includes a sensing electrode array including a first sensing electrode array and a second sensing electrode array, and a transmission line electrically connected to the sensing electrode array. The transmission line includes a lower transmission line, and an upper transmission line electrically connected to the lower transmission line through a line contact hole. The first sensing electrode array includes a first sensing electrode and a first bridge electrode electrically connected to the first sensing electrode. The second sensing electrode array includes a second sensing electrode and a second bridge electrode electrically connected to the second sensing electrode. The lower transmission line, the upper transmission line, the first sensing electrode, the first bridge electrode, the second sensing electrode, and the second bridge electrode, refer to those described in this specification.