Magnetic Pixel Defining Layer for Quantum Dot Display Uniformity
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Solution Overview
Problem
Current methods for manufacturing quantum dot light emitting devices face challenges in achieving uniform film formation and reducing step differences in the pixel defining layer, leading to issues like uneven film formation and potential electrical leaks, especially when forming layers with thicknesses greater than 50 nm.
Innovation Solution
The use of magnetic particles and fields to form a pixel defining layer with a thickness of 20 nm to 50 nm, and applying magnetic fields to uniformly deposit quantum dot materials, ensuring precise placement and cross-linking of quantum dots to form uniform quantum dot light emitting layers, thereby avoiding uneven film formation and electrical issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pixel defining layer thickness is increased to prevent electrical leaks, then electrical insulation is improved, but step differences increase and manufacturing precision deteriorates
Solution Approach 1:
The patent applies magnetic field strength as a controllable parameter to precisely regulate the deposition and distribution of magnetic particles during pixel defining layer formation. By adjusting magnetic field parameters, the process achieves optimal balance between layer thickness (for electrical insulation) and step difference control (for manufacturing precision), resolving the technical contradiction between reliability and manufacturing precision
Solution Approach 2:
The patent implements a feedback mechanism where magnetic field application and particle distribution are continuously monitored and adjusted. The magnetic field strength and duration are optimized based on observed particle accumulation patterns, enabling real-time control to maintain both adequate thickness for electrical insulation and minimal step differences for manufacturing precision
2Manufacturing precision
If magnetic field strength is increased to improve quantum dot material uniformity, then film uniformity is improved, but particle aggregation increases
Solution Approach 1:
The patent employs dynamic control of magnetic field parameters, adjusting field strength and application timing during the deposition process. The magnetic field is applied in controlled stages with varying intensities, allowing particles to distribute uniformly without excessive aggregation, thus maintaining both film uniformity and particle distribution stability
Solution Approach 2:
The patent utilizes periodic magnetic field application with optimized pulse durations and intervals. This periodic action allows particles to settle and redistribute in controlled cycles, preventing continuous strong magnetic forces from causing aggregation while still achieving uniform film formation through repeated gentle deposition cycles
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 approach allows for the formation of quantum dot light emitting devices with improved uniformity and reduced step differences, enhancing the production process and preventing electrical leaks, while maintaining the desired thickness and functionality of the quantum dot layers.
Implementation Method 1
applying a first magnetic field to the substrate so that the first magnetic field acts on an area where the pixel defining layer is to be formed
Implementation Method 2
applying magnetic fields to uniformly deposit quantum dot materials
Implementation Method 3
curing and cross-linking the magnetic particles in the pixel defining film that is remained by heating or irradiating
Data Source
AI summary
Embodiments of the present disclosure provide an array substrate and a manufacturing method therefor, and a display panel. The array substrate includes: a substrate and a pixel defining layer provided on the substrate, the pixel defining layer including a plurality of opening areas, and the plurality of opening areas being provided with a plurality of quantum dot light-emitting devices in a one-to-one correspondence manner; each of the quantum dot light-emitting devices includes a quantum dot light-emitting layer, and the quantum dot light-emitting layer is made of a quantum dot material. At least one of the pixel defining layer and the quantum dot material is magnetic.