Pixel Conductive Layer Structure for Reliable Emitting Element Alignment
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Solution Overview
Problem
Current display devices face challenges in enhancing reliability due to limitations in the design and structure of pixels, particularly in the arrangement and connection of conductive and insulating layers, which affect the performance and efficiency of light emitting elements.
Innovation Solution
The proposed display device incorporates a specific configuration of conductive and insulating layers, including first and second conductive patterns, alignment electrodes, and power lines, with through-holes and via holes for electrical connections, to improve the alignment and connection of light emitting elements, enhancing the reliability and efficiency of pixel structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pixel structures are used, then device complexity is reduced, but reliability of light emitting elements deteriorates due to improper alignment and electrical connections
Solution Approach 1:
The pixel structure is divided into multiple functional layers including first and second conductive layers, first and second insulating layers, and alignment electrodes. Each layer is segmented into specific patterns (first conductive pattern, second conductive pattern, third conductive pattern) that perform distinct functions in establishing electrical connections and aligning light emitting elements, thereby improving reliability through structured organization.
Solution Approach 2:
The patent introduces a multi-layer vertical structure with conductive and insulating layers stacked sequentially. Through-holes and via holes create vertical electrical pathways, adding the vertical dimension to the electrical connection architecture. This layered approach separates functions across different planes, improving alignment and connection reliability while managing complexity through spatial organization.
2Reliability
If simplified conductive layer arrangements are used, then manufacturing is easier, but electrical connection reliability deteriorates
Solution Approach 1:
Alignment electrodes are formed in advance within the conductive and insulating layer structure, establishing predetermined electrical pathways before light emitting elements are assembled. Through-holes and via holes are pre-formed to create vertical connection routes, ensuring that electrical connections are properly established before final assembly, thereby improving connection reliability while maintaining manufacturing feasibility.
Solution Approach 2:
The patent introduces intermediate conductive patterns (first conductive pattern, second conductive pattern, third conductive pattern) and insulating layers as mediators between power lines and light emitting elements. These intermediate structures facilitate electrical connections by providing dedicated pathways and isolation, improving connection reliability without requiring direct complex arrangements between power lines and emitting elements.
3Manufacturing precision
If multiple conductive patterns are used for alignment, then alignment precision improves, but device complexity increases
Solution Approach 1:
The conductive patterns serve multiple functions: the first conductive pattern provides electrical connection pathways, the second conductive pattern establishes additional connection routes, and the third conductive pattern enables alignment of light emitting elements. By making conductive structures multi-functional, the patent achieves precise alignment without adding separate dedicated alignment structures, thereby managing complexity while improving precision.
Solution Approach 2:
The patent merges alignment functionality with conductive patterns by forming alignment electrodes within the conductive layer structure. The same conductive patterns that provide electrical connections also serve as alignment references for light emitting elements. This merging of functions reduces the need for separate alignment structures, improving precision while controlling complexity through functional integration.
Data Source
AI summary
A display device may include pixels disposed on a substrate. Each of the pixels may include a first conductive layer including first, second, and third conductive patterns, first and second insulating layers that are stacked on each other on the first conductive layer, a second conductive layer including a first power line, a second power line, and a connection pattern, third and fourth insulating layers that are stacked on each other on the second conductive layer, a third conductive layer including first alignment electrodes and second alignment electrodes, and a light emitting element disposed on the first and second alignment electrodes. At least one of the first alignment electrodes may be electrically connected to at least one of the first, second, and third conductive patterns.