Pixel Electrode Layout With Insulating Openings to Prevent Shorts
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Solution Overview
Problem
Existing display devices face challenges in ensuring the reliability and efficiency of pixels, particularly in the electrical connections and structural integrity of light emitting elements, which can lead to issues such as short-circuiting and reduced lifespan.
Innovation Solution
A pixel design incorporating specific line components, electrodes, and light emitting elements with a bank structure and insulating layers to enhance electrical connectivity and structural stability, including a bank with openings for electrode division and insulating layers to prevent short-circuiting and improve emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pixel structure with simple electrode connections is used, then the device complexity is low, but the reliability of electrical connections deteriorates leading to short-circuiting
Solution Approach 1:
The pixel structure is divided into multiple functional components including first and second electrodes, first and second line components, and insulating layers with openings. This segmentation allows each component to perform its specific function independently, improving electrical connection reliability while managing complexity through modular design
Solution Approach 2:
Insulating layers with openings are introduced as intermediary elements between conductive components. These insulating layers prevent direct contact between adjacent line components that would cause short-circuits, while the openings maintain necessary electrical connections through the insulating barrier
2Area of stationary object
If line components are closely spaced to reduce pixel area, then the area is reduced, but the risk of short-circuiting increases
Solution Approach 1:
Insulating layers are positioned between closely spaced line components (first and second line components) to prevent short-circuiting. These intermediaries allow the components to maintain close spacing for area reduction while ensuring electrical isolation for reliability
Solution Approach 2:
The insulating layers are selectively applied in specific regions where short-circuiting risks exist between line components, while maintaining open areas where electrical connections are needed. This local differentiation allows close spacing overall while preventing shorts at critical interfaces
3Productivity
If multiple power supplies with different potentials are applied to improve light emitting element performance, then the emission efficiency improves, but the complexity of power line management increases
Solution Approach 1:
The power supply system is segmented into multiple independent line components (first power line, second power line, third power line) each carrying different potentials. This segmentation allows efficient management of multiple power supplies by assigning each to dedicated conductive paths, improving emission efficiency while organizing complexity through structured separation
Data Source
AI summary
A pixel may include a first line component, a second line component, a third line component, and a fourth line component that are spaced apart from each other on a substrate and extend in a direction, a conductive pattern disposed on the first and the second line components, a passivation layer disposed on the conductive pattern, a first electrode disposed on the passivation layer and directly contacting the conductive pattern, a second electrode disposed adjacent to the first electrode and spaced apart from the first electrode, and a third electrode disposed adjacent to the second electrode, and spaced apart from the second electrode, and electrically connected to the third line component, a first pixel electrode and a second pixel electrode that are disposed on the first to the third electrodes and spaced apart from each other, and light emitting elements electrically connected to the first and the second pixel electrodes.