OLED Display Panel Scattering Layers Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED display panels suffer from significant light loss due to total reflection at the interface, leading to inefficient light extraction, and existing methods to improve this either compromise chromaticity or increase panel thickness, making them unsuitable for commercial production.
Innovation Solution
A manufacturing method for OLED display panels involving a thin film encapsulation layer, a first scattering layer formed using inorganic oxide particles, a quantum dot layer made of cadmium sulfide or cadmium selenide, and a second scattering layer with a nano-mesh structure, which extracts and orders light emission to enhance luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional light extraction methods are applied inside the OLED device or glass substrate, then light extraction efficiency is improved, but manufacturing complexity increases and chromaticity cannot be effectively guaranteed
Solution Approach 1:
The patent introduces a scattering layer as an intermediary component between the OLED device and the external environment. This scattering layer mediates the light extraction process by scattering the light emitted from the OLED device, thereby improving light extraction efficiency without requiring complex modifications to the OLED device structure or glass substrate. The scattering layer acts as a simple external attachment that achieves the desired light extraction enhancement while maintaining manufacturing simplicity and chromaticity control.
2Loss of energy
If an external light extraction device is added, then light extraction efficiency is improved, but the thickness of the overall OLED display panel increases
Solution Approach 1:
The patent employs a thin film scattering layer as the external light extraction device. This thin film structure provides the necessary light scattering function while maintaining a minimal thickness profile. The scattering layer is designed as a thin coating that can be applied to the OLED display panel surface, thereby improving light extraction efficiency without significantly increasing the overall panel thickness. This approach aligns with the requirement for thin, flexible light extraction solutions that do not compromise the sleek design of modern display panels.
3Productivity
If light extraction is improved through internal modifications, then luminous efficiency is improved, but chromaticity control is compromised
Solution Approach 1:
The patent segments the light extraction function from the OLED device structure itself by using a separate scattering layer. This segmentation allows the OLED device to maintain its original design and chromaticity characteristics while the scattering layer independently handles the light extraction enhancement. By separating these functions, the patent achieves improved luminous efficiency through the scattering layer without compromising the chromaticity control of the OLED device, as each component can be optimized independently for its specific function.
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 method achieves uniform light emission and improves luminous efficiency by effectively extracting and ordering light from the OLED device, reducing light loss and maintaining chromaticity without increasing panel thickness.
Implementation Method 1
forming a first scattering layer on the thin film encapsulation layer... the first scattering layer extracts light from the OLED device
Implementation Method 2
the quantum dots are excited to perform light color matching to emit the light of the desired color
Implementation Method 3
the second scattering layer extracts the light excited by the quantum dot layer in an orderly manner, so that the OLED display panel emits light uniformly
Data Source
AI summary
The invention provides an OLED display panel and manufacturing method thereof. The manufacturing method of OLED display panel of the invention forms a first scattering layer on the thin film encapsulation layer, a quantum dot layer on the first scattering layer, and a second scattering layer on the quantum dot layer. The first scattering layer extracts light from the OLED device, so that the light totally reflected by OLED device through thin film encapsulation layer is emitted as much as possible; the light extracted by the first scattering layer reaches the quantum dot layer. The quantum dots are excited to perform light color matching to emit light of desired color. Since the light excited by quantum dot layer is dispersed, the second scattering layer extracts the light excited by the quantum dot layer in an orderly manner, so that the OLED display panel emits light uniformly, thereby improving luminous efficiency.