Display Encapsulation Layers for Low-Reflection Visibility
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Solution Overview
Problem
Display apparatuses experience reduced visibility due to external light reflection and potential contamination between layers.
Innovation Solution
Incorporation of a dye and pigment in specific refractive layers with varying refractive indices and organic materials to reduce light reflection and prevent contamination between layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter is used to reduce external light reflection, then visibility is improved, but the possibility of contamination between layers increases
Solution Approach 1:
The encapsulation layer is divided into multiple sub-layers (first encapsulation layer, second encapsulation layer, third encapsulation layer) with different materials and functions. The color filter is integrated into a specific sub-layer rather than being a separate component, reducing the number of interfaces where contamination can occur while maintaining the anti-reflection function.
Solution Approach 2:
The color filter layer is merged with the encapsulation layer structure, where the encapsulation layer itself provides both protective encapsulation and color filtering functions. This integration eliminates the need for separate color filter layers and reduces the overall number of layers, thereby reducing contamination risk at layer interfaces.
2Illumination intensity
If multiple layers are stacked to reduce light reflection, then visibility is improved, but the complexity of the structure increases
Solution Approach 1:
The encapsulation layer is designed to serve multiple functions simultaneously: it provides physical encapsulation/protection of the display element, acts as a color filter to reduce external light reflection, and provides structural support. This multi-functionality reduces the need for separate dedicated layers for each function, simplifying the overall structure.
Solution Approach 2:
Multiple functions (encapsulation, color filtering, anti-reflection) are combined into a single integrated encapsulation layer structure with three sub-layers, rather than using separate stacked layers for each function. This merging reduces the total number of layers and interfaces while achieving all required functions.
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
Enhances visibility by minimizing external light reflection and prevents contamination, thereby improving chemical resistance and display quality.
Implementation Method 1
a dye, wherein an absorbance of the dye with respect to light in a wavelength band of greater than 575 nm and less than 605 nm may be greater than an absorbance of the dye with respect to light in a wavelength band of 605 nm to 650 nm
Implementation Method 2
a pigment, wherein an absorbance of the pigment with respect to light in a wavelength band of 380 nm to 480 nm may be greater than an absorbance of the pigment with respect to light in a wavelength band of 605 nm to 650 nm
Implementation Method 3
a first refractive layer on the encapsulation layer, and having an opening corresponding to the display element; and a second refractive layer covering the first refractive layer, the second refractive layer including a pigment and a second organic material, and having a refractive index different from a refractive index of the first refractive layer
Data Source
AI summary
A display apparatus includes: a substrate; a display element on the substrate; an encapsulation layer on the display element, and including a dye and a first organic material; a first refractive layer on the encapsulation layer, and having an opening corresponding to the display element; and a second refractive layer covering the first refractive layer, the second refractive layer including a pigment and a second organic material, and having a refractive index different from a refractive index of the first refractive layer.