Photosensitive Composition for OLED Light Shielding Layer
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Solution Overview
Problem
Conventional methods for reducing reflectance in organic light emitting display devices, such as using anti-reflective and anti-glare films, have reached limitations, and there is a need for a photosensitive composition that can provide excellent resolution and low reflection properties while implementing light shielding properties.
Innovation Solution
A photosensitive composition comprising an alkali soluble resin with a specific repeating unit, a reactive unsaturated compound, a photoinitiator, a black colorant, and hollow silica particles, which forms a light shielding layer with reduced reflectance and improved resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If anti-reflective films and anti-glare films are applied to reduce reflectance, then reflectance is reduced, but device complexity increases and the method has reached its limit
Solution Approach 1:
The patent combines light shielding function and anti-reflective function into a single integrated layer. The black matrix or light shielding partition is formed using a photosensitive resin composition that inherently provides both light blocking capability and reduced reflectance through its composition containing hollow silica particles and specific resin materials, eliminating the need for separate anti-reflective film applications.
Solution Approach 2:
The photosensitive resin composition uses composite materials including hollow silica particles, specific resins, and other additives to achieve both light shielding and low reflectance properties in a single material system. This composite approach allows simultaneous optimization of multiple properties without requiring multiple separate layers or films.
2Manufacturing precision
If resolution is increased to achieve fine black matrix patterns, then pattern fineness is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent optimizes parameters of the photosensitive resin composition including viscosity, molecular weight distribution, and chemical composition to enable formation of fine patterns at 8K resolution. The specific resin selection and composition ratios are tuned to achieve appropriate flow characteristics and curing properties that facilitate high-resolution patterning while maintaining ease of manufacture.
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 composition effectively reduces reflectance and enhances resolution in organic light emitting display devices by forming a light shielding layer with excellent light shielding properties and low reflection, improving the overall performance and visibility of the devices.
Implementation Method 1
a photoinitiator
Implementation Method 2
a hollow silica particle
Data Source
AI summary
Provided are a photosensitive composition for forming a light shielding layer of an organic light emitting display device, which includes (A) an alkali soluble resin including a repeating unit represented by Formula (1); (B) a reactive unsaturated compound; (C) a photoinitiator; (D) a black colorant; (E) a hollow silica particle; and (F) a solvent, a light shielding layer of an organic light emitting display device including the composition with excellent resolution while simultaneously implementing light shielding properties and low reflection properties, an organic light emitting display device including the light shielding layer, and an electronic device including the organic light emitting display device.