Serrated Encapsulation Layer for QD-OLED Blue Light Conversion
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Solution Overview
Problem
Existing quantum dot OLED displays have low blue light conversion efficiency, limiting their performance.
Innovation Solution
A display panel design featuring a serrated encapsulation layer with sawteeth protruding towards the blue OLED layer, combined with a quantum dot color film layer containing red, green, and transparent regions, enhances light refraction and path length, improving blue light conversion efficiency while protecting the quantum dot layer from water and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar encapsulation layer is used in QD-OLED structure, then the device structure is simple and easy to manufacture, but the blue light conversion efficiency is low
Solution Approach 1:
The encapsulation layer is designed with a serrated structure featuring multiple sawteeth instead of a planar surface. The curved inclined surfaces of the sawteeth refract blue light at different angles, extending the optical path length through the quantum dot layer and improving blue light conversion efficiency while maintaining manufacturing feasibility through conventional coating processes
2Loss of energy
If the optical path length through quantum dot regions is increased, then blue light conversion efficiency improves, but the device structure becomes more complex
Solution Approach 1:
The encapsulation layer transitions from a two-dimensional planar structure to a three-dimensional serrated structure with multiple sawteeth. This dimensional change creates extended optical paths through refraction at the inclined surfaces, increasing the interaction length between blue light and quantum dots without adding lateral space, thus improving conversion efficiency with controlled structural 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
The serrated encapsulation layer increases the optical path of blue light through the quantum dot regions, enhancing conversion efficiency and protecting the quantum dot film, thereby improving display performance.
Implementation Method 1
the serrated encapsulation layer comprises a sawtooth region and a planar region, such that a incident light is refracted in the sawtooth region, and an optical path is increased when passing through the red quantum dot region and the green quantum dot region
Implementation Method 2
The structure utilizes photoluminescence characteristics of quantum dots, excites red-green quantum dots to emit monochrome red-green light through the blue OLED of the backlight source
Data Source
AI summary
The present invention provides a display panel and a manufacturing method thereof. The display panel comprises a blue organic light-emitting diode (OLED) layer, a thin film encapsulation layer, and a quantum dot color film layer, wherein a serrated encapsulation layer disposed on a side surface of the quantum dot color film layer near the thin film encapsulation layer. The method for manufacturing the display panel comprises a quantum dot color film layer manufacturing step, a serrated encapsulation layer manufacturing step, a blue OLED layer manufacturing step, and a thin film encapsulation layer manufacturing step. The technical effect of the present invention is that the serrated encapsulation layer is disposed on a surface of the quantum dot color film layer, so that blue light is refracted, optical path of blue light in the quantum dot layer is increased, and light conversion efficiency of blue light is improved.