Display Panel Retarder with Oxygen-Graded Encapsulation for Optical Control
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Solution Overview
Problem
Existing display devices face challenges in achieving high-resolution display quality while being miniaturized, with a need for improved transmittance and reflectance to enhance emission characteristics.
Innovation Solution
A display panel design comprising a circuit element layer, a display element layer, an encapsulation layer, a first retarder, a first inorganic layer, and a second inorganic layer, where the first inorganic layer has a lower oxygen content and higher refractive index than the second, with specific thickness and Young's modulus ranges, and includes silicon nitride, and the encapsulation layer has multiple inorganic and organic layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inorganic layer is used in the encapsulation structure, then the device structure is simpler, but the transmittance and reflectance characteristics are insufficient
Solution Approach 1:
The encapsulation structure is divided into multiple inorganic layers with different oxygen contents and refractive indices. The first inorganic layer has lower oxygen content while the second inorganic layer has higher oxygen content, creating distinct optical properties in each layer to optimize both transmittance and reflectance characteristics
Solution Approach 2:
The patent uses composite inorganic layers with different compositions (varying oxygen contents) to create an encapsulation structure that combines the advantages of multiple materials. This composite approach enables simultaneous optimization of optical properties without significantly increasing structural complexity
2Stability of the object's composition
If the first inorganic layer has high oxygen content, then the material is more stable, but the refractive index decreases reducing optical performance
Solution Approach 1:
Different regions of the encapsulation structure are assigned different oxygen contents to achieve local optimization. The first inorganic layer has lower oxygen content for higher refractive index, while the second inorganic layer has higher oxygen content for greater stability, allowing each layer to perform its specific function optimally
Solution Approach 2:
The patent varies the oxygen content parameter across different inorganic layers to achieve the desired balance between stability and refractive index. By controlling the oxygen content in each layer, the patent optimizes both the chemical stability and optical properties of the encapsulation structure
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 design enhances display reliability and quality, enabling high-resolution displays with improved transmittance and reflectance, suitable for various electronic devices including flat panel displays, wearable devices, and medical monitors.
Implementation Method 1
a refractive index of the first inorganic layer may be greater than that of the second inorganic layer
Data Source
AI summary
Provided is a display device. The display device include a display panel and a window disposed on the display panel, wherein the display panel includes: a circuit element layer; a display element layer disposed on the circuit element layer and comprising a light emitting element; an encapsulation layer disposed on the display element layer; a first retarder disposed on the encapsulation layer; a first inorganic layer disposed on the first retarder; and a second inorganic layer disposed on the first inorganic layer, wherein a ratio of oxygen atoms contained in the first inorganic layer is less than that of oxygen atoms contained in the second inorganic layer.