Display Quantum Dot Layer Geometry for Efficient Light Conversion
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Solution Overview
Problem
Existing display devices face challenges in improving light conversion efficiency and reducing the manufacturing time for quantum dot layers.
Innovation Solution
The display device incorporates a first and second quantum dot layer with specific geometric configurations, including portions with varying widths and thicknesses, and is surrounded by barrier layers with openings to enhance light conversion efficiency and streamline manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum dot layers are made with uniform thickness and shape, then manufacturing process is simple, but light conversion efficiency is insufficient
Solution Approach 1:
The quantum dot layer is designed with non-uniform thickness where the first portion (over emission area) has greater thickness than the second portion (over non-emission area). This local variation optimizes light conversion efficiency in different regions while maintaining manufacturability through a single-layer deposition process.
2Loss of energy
If quantum dot layers cover entire pixel area, then light conversion is maximized, but manufacturing time increases
Solution Approach 1:
The quantum dot layer is segmented into functionally distinct portions: the first portion over the emission area performs light conversion, while the second portion over the non-emission area provides structural continuity and electrical isolation. This segmentation allows optimized coverage without requiring separate manufacturing steps for different regions.
3Object-affected harmful factors
If barrier layers have complex opening patterns, then light leakage is prevented, but device complexity increases
Solution Approach 1:
The barrier layers feature asymmetric opening patterns where the first opening exposes the first portion of the quantum dot layer, and the second opening exposes both the first and second portions. This asymmetric design effectively prevents light leakage from non-emission areas while maintaining manufacturing simplicity through sequential deposition.
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 conversion efficiency and reduces the time required for manufacturing quantum dot layers, enhancing the overall performance and production efficiency of the display device.
Implementation Method 1
Each of the light conversion layers includes quantum dots for converting a wavelength of light
Data Source
AI summary
A display device includes a display panel and a first quantum dot layer disposed on the display panel, wherein the first quantum dot layer includes a first portion and a second portion extending from a side of the first portion in a first direction. The second portion has a width less than a width of the first portion in a second direction intersecting the first direction.