Display Optical Stack with Low-Reflection Layers
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Solution Overview
Problem
Existing display apparatuses face challenges in providing high-quality images with improved light efficiency and visibility, particularly due to issues with light reflection and absorption.
Innovation Solution
The display apparatus incorporates a low-reflection inorganic layer, a light-shielding layer with specific openings, and insulating layers with different refractive indices to absorb and manage light wavelengths, enhancing optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-shielding layer is used to block external light, then visibility is improved, but light efficiency deteriorates
Solution Approach 1:
The patent segments the light management function into multiple layers: a light-shielding layer for blocking external light and insulating layers for absorbing specific wavelengths. This segmentation allows each layer to specialize in one function, improving overall light efficiency while maintaining visibility.
Solution Approach 2:
The insulating layers are positioned specifically at the opening areas where light needs to be absorbed, while the light-shielding layer covers the emission areas. This local quality differentiation ensures that light is blocked where needed for visibility but allowed to pass through where it can be efficiently absorbed by the insulating layers.
2Use of energy by moving object
If multiple layers are added to improve optical performance, then light efficiency is improved, but device complexity increases
Solution Approach 1:
The insulating layers serve multiple functions: they act as electrical insulators between conductive layers and simultaneously function as optical elements that absorb specific wavelengths. This multi-functionality reduces the need for separate optical filtering layers, thereby reducing overall device complexity while maintaining light efficiency.
Solution Approach 2:
The patent employs composite material structures where insulating layers with specific optical properties are combined with light-shielding layers. This composite approach allows the structure to achieve both electrical insulation and optical filtering functions, improving light efficiency without proportionally increasing complexity.
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 reducing external light reflectance and selectively absorbing specific light wavelengths, resulting in higher-quality images.
Implementation Method 1
the first insulating layer includes a material configured to absorb light in a wavelength band of about 380 nm to about 500 nm
Implementation Method 2
a low-reflection inorganic layer on the display element
Implementation Method 3
The second insulating layer may selectively absorb light in a first wavelength range and light in a second wavelength range of a visible light spectrum
Data Source
AI summary
A display apparatus includes: a substrate; a display element arranged on the substrate; a low-reflection inorganic layer arranged on the display element; a light-shielding layer arranged on the low-reflection inorganic layer and including an opening corresponding to an emission area of the display element; a first insulating layer arranged on the light-shielding layer and including an opening corresponding to the emission area of the display element; and a second insulating layer filling the opening of the light-shielding layer and the opening of the first insulating layer, wherein the first insulating layer includes a material configured to absorb light in a wavelength band of about 380 nm to about 500 nm, and a thickness of the first insulating layer is greater than a thickness of the light-shielding layer.