SiON Capping Layer for Display Panel Luminous Efficiency
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Solution Overview
Problem
Display panels face challenges in achieving high luminance, reliability, and mass productivity while maintaining durability and luminous efficiency, particularly in protecting light emitting materials without reducing luminous efficiency.
Innovation Solution
A display panel design incorporating a base substrate with a light emitting element, a light control layer, a color filter layer, and a capping layer made of silicon oxynitride (SiON) with specific oxygen and nitrogen content, along with a light control layer containing quantum dots and partition walls, which also includes a filling layer and an encapsulation member with an inorganic layer for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is added to protect light emitting materials, then durability is improved, but luminous efficiency is reduced
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of silicon oxynitride (SiON) in the capping layer. By adjusting the oxygen and nitrogen content to specific ranges, the material's optical properties are optimized to minimize light absorption while maintaining protective functions, thus resolving the contradiction between durability and luminous efficiency
Solution Approach 2:
The patent uses composite materials by employing silicon oxynitride (SiON) as a capping layer material that combines the protective properties of inorganic materials with optimized optical transmission characteristics. This composite approach allows the layer to provide both protection and maintain high luminous efficiency
2Illumination intensity
If pixel integration degree is increased to improve luminance, then manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the light control layer into multiple functional parts including light conversion parts with quantum dots and transmission parts. This segmentation allows for optimized light control in each pixel while maintaining a manageable manufacturing process through standardized layer structures
Solution Approach 2:
The patent applies universality by designing a multi-functional light control layer that integrates light conversion, light transmission, and color control functions into a single structured layer. This reduces the number of separate components needed and simplifies the overall manufacturing process while achieving high luminance
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 solution enhances luminance, reliability, and durability while maintaining high luminous efficiency by effectively protecting the light emitting materials and preventing efficiency reduction, even under high temperature and humidity conditions.
Implementation Method 1
a capping layer contacting at least the light control layer and including silicon oxynitride (SiON)
Implementation Method 2
a light control layer on the light emitting element... a first light conversion part to convert the first light into second light, a second light conversion part to convert the first light into third light
Implementation Method 3
The light control layer may include a plurality of quantum dots
Data Source
AI summary
A display panel and a manufacturing method of a display panel are provided. A display panel includes: a base substrate in which a pixel area and a peripheral area adjacent to the pixel area are defined; a light emitting element located on the base substrate to overlap the pixel area, and configured to generate first light; a light control layer on the light emitting element; a color filter layer on the light control layer; and a capping layer contacting at least the light control layer and including silicon oxynitride (SiON), and the capping layer contains about 34 at % to about 41 at % of oxygen, and about 18 at % to about 25 at % of nitrogen. Luminous efficiency of the display panel may be increased while maintaining durability of the display panel.