Multi-Layer Light Blocking in Displays for Reflection and Visibility
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Solution Overview
Problem
Existing display apparatuses face challenges in providing high-quality images due to issues with light efficiency and visibility, particularly in thinner and more lightweight designs.
Innovation Solution
The display apparatus incorporates a substrate with a low-reflection inorganic layer, a light blocking layer with multiple layers having different light absorption spectra, and a reflection control layer to enhance light management, including a first light blocking layer in black and a second in yellow, along with a pixel defining layer to optimize light emission and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light blocking layer is added to reduce external light reflection, then visibility is improved, but device complexity increases
Solution Approach 1:
The light blocking layer is divided into multiple sub-layers with different light absorption characteristics. Each sub-layer targets specific wavelength ranges, allowing selective blocking of external light while maintaining display quality. This segmentation approach improves visibility by addressing different spectral components separately, while the modular structure makes the complexity manageable and systematic.
Solution Approach 2:
The patent employs composite light blocking structures combining multiple materials with complementary absorption properties. By stacking layers with different spectral characteristics, the system achieves broad-spectrum light blocking effectiveness. This composite approach enhances visibility across the entire visible range while distributing the functional requirements across multiple specialized layers.
2Use of energy by moving object
If multiple light blocking layers with different absorption spectra are used, then light efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
Each light blocking layer is designed with specific local optical properties tailored to its functional role. Different layers have different absorption spectra, thicknesses, and material compositions optimized for their specific wavelength ranges. This local quality differentiation allows each layer to contribute maximally to overall light efficiency, while the clear functional division simplifies the manufacturing process for each individual layer.
Solution Approach 2:
The patent systematically varies key parameters such as layer thickness, material composition, and absorption characteristics across different light blocking layers. By optimizing these parameters for each layer's specific function, the system achieves high overall light efficiency. The parameter variations are designed to work synergistically, where each layer's optimized parameters contribute to the cumulative effect of improved light management.
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
This configuration improves light efficiency and visibility by selectively absorbing specific wavelength bands, reducing external light reflection, and enhancing the quality of displayed images.
Implementation Method 1
The light blocking layer includes a first light blocking layer and a second light blocking layer having different light absorption wavelength spectra from each other
Implementation Method 2
the reflection control layer may selectively absorb a first wavelength band and a second wavelength band of a visible light band
Data Source
AI summary
A display apparatus includes a substrate, a display element on the substrate, a low-reflection inorganic layer on the display element, a light blocking layer on the low-reflection inorganic layer and defining an opening corresponding to an emission area of the display element, and a reflection control layer filling the opening of the light blocking layer. The light blocking layer includes a first light blocking layer and a second light blocking layer having different light absorption wavelength spectra from each other.