Display Insulating Layer Groove Structure Against Impact and Impurities
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Solution Overview
Problem
Display devices are vulnerable to external impacts and impurities permeation, which can lead to defects and reduced reliability.
Innovation Solution
A display device design featuring a substrate with a metal layer between pixel areas, an inorganic insulating layer with grooves exposing the metal layer, and an organic insulating layer filling these grooves, along with connection lines on the organic insulating layer, enhances robustness against external impacts and prevents impurity penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the insulating layer thickness is reduced to improve device integration, then manufacturing precision is improved, but the device becomes more vulnerable to external impacts and impurity permeation
Solution Approach 1:
The patent applies composite materials by combining inorganic insulating layers with specific metal layers (such as aluminum or copper) to create a multi-layer structure. This composite structure provides both the required thin profile for high integration and the mechanical strength and impurity barrier properties needed for reliability. The inorganic insulating layer serves dual functions as both electrical insulator and mechanical protective layer.
Solution Approach 2:
The patent segments the insulating structure into multiple functional layers: an inorganic insulating layer for electrical isolation and mechanical protection, and metal layers for electrical connectivity. This segmentation allows each layer to be optimized independently - the inorganic layer can be made thin for integration while maintaining protective functions, and metal layers can be strategically placed for both electrical and structural purposes.
2Measurement precision
If the number of transistors and lines is increased to improve display control precision, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the inorganic insulating layer structure. This layer simultaneously provides electrical insulation for high-density transistor integration, mechanical protection against external impacts, and barrier protection against impurity permeation. By combining these functions into a single integrated structure, the patent enables high display control precision without proportionally increasing device complexity.
Solution Approach 2:
The inorganic insulating layer serves multiple universal functions: electrical insulation, mechanical strengthening, and impurity barrier. This multi-functionality allows the patent to increase transistor and line density for better display control while the same structural element (the inorganic insulating layer) protects against the increased complexity's vulnerabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design ensures consistent insulating layer thickness and prevents impurity ingress, reducing the risk of defects and improving the device's durability and reliability.
Implementation Method 1
a display device including an organic EL light source, a first polarizing plate, a first phase compensation film, a first retardation film, a second phase compensation film, a second retardation film, and a second polarizing plate
Data Source
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AI summary
A display device may include a substrate including a first pixel area on which a first pixel is positioned and a second pixel area on which a second pixel is positioned, a metal layer disposed on the substrate between the first pixel area and the second pixel area, an inorganic insulating layer disposed on the metal layer and having a groove exposing at least a portion of the metal layer, and an organic insulating layer filling the groove of the inorganic insulating layer.