Inorganic LED Display Encapsulation Against Moisture Corrosion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inorganic electroluminescent displays with inorganic LEDs are susceptible to moisture ingress, which can cause corrosion of electrodes and wiring, leading to decreased luminous efficiency and deteriorated display characteristics.
Innovation Solution
A display device comprising a substrate with arrayed pixels, each equipped with an inorganic light-emitting element, surrounded by a flattening film and covered by an inorganic film that prevents moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If inorganic light-emitting elements are used in display devices, then luminous efficiency is improved and environmental resistance is enhanced, but susceptibility to moisture ingress causing corrosion of electrodes and wiring increases
Solution Approach 1:
The patent implements a nested protective film structure where an organic film is positioned between the inorganic light-emitting element and the inorganic protective film. This nested arrangement allows the organic film to fill gaps and conform to the contours of the light-emitting element, creating a multi-layered defense system that combines the advantages of both organic and inorganic materials for superior moisture protection
Solution Approach 2:
The patent employs a composite protective film structure combining organic and inorganic materials. The organic film provides flexibility and gap-filling properties, while the inorganic film offers low moisture permeability. This composite approach leverages the complementary strengths of different material types to achieve reliable moisture protection for the inorganic light-emitting elements
2Reliability
If protective films are added to prevent moisture ingress, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent utilizes thin film structures for moisture protection, where the organic film and inorganic film are deposited as thin layers rather than bulky protective structures. This approach provides effective moisture barrier functionality while maintaining a compact and simple device form factor, avoiding significant increases in device complexity
Solution Approach 2:
The protective film structure serves multiple functions simultaneously: the organic film provides mechanical protection and gap-filling, while the inorganic film provides the primary moisture barrier. This multi-functional design achieves reliable moisture protection without requiring separate dedicated components for each protective function, thereby limiting the increase in device complexity
Data Source
AI summary
A display device including a substrate, a plurality of pixels, a plurality of inorganic light-emitting elements, a flattening film, and an inorganic film. The pixels are arrayed on the substrate and display different colors. The inorganic light-emitting elements are provided to the respective pixels. The flattening film surrounds at least a side surface of the inorganic light-emitting element. The inorganic film covers the flattening film and the inorganic light-emitting element. The upper surface of the inorganic light-emitting element is exposed from the flattening film and is in contact with the inorganic film. Alternatively, the flattening film is provided covering the upper surface of the inorganic light-emitting element.