Magnetic Composite Alignment Film for Display Panels
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Solution Overview
Problem
The existing polyimide liquid coating methods in display panels, such as inkjet printing, suffer from low precision and uneven film thickness, leading to issues like light leakage and backflow, especially in high-end models with ultra-narrow bezels, where precise control over the coating is critical.
Innovation Solution
A method involving a magnetic composite structure on the base plate, with a magnetic probe interacting with the structure to form a uniform alignment film by deforming and leveling droplets, ensuring uniform distribution and improved coating accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inkjet printing method is used to coat polyimide liquid, then non-contact printing is achieved, but coating precision deteriorates due to uneven film thickness and poor edge linearity
Solution Approach 1:
The patent replaces the mechanical inkjet printing system with a magnetic field-based coating system. A magnetic probe generates a magnetic field that interacts with a magnetic composite structure on the base plate, using magnetic forces to control polyimide liquid droplet distribution and formation of uniform films, thereby eliminating the precision limitations of mechanical printing methods
Solution Approach 2:
The patent changes the coating mechanism from pressure-driven mechanical ejection to magnetic field-driven droplet control. By adjusting magnetic field parameters (strength, distribution, and interaction with the magnetic composite structure), the system achieves precise control over droplet placement and film formation, improving coating precision while maintaining ease of manufacture
2Productivity
If polyimide liquid is sprayed as microdroplets, then printing efficiency is improved, but film uniformity deteriorates due to strong fluidity and poor edge control
Solution Approach 1:
The patent substitutes the mechanical spray deposition process with a magnetic field-based droplet control system. The magnetic probe interacts with the magnetic composite structure to guide and position microdroplets precisely, while the magnetic field maintains droplet integrity during transport, achieving both high efficiency and uniform film formation
Solution Approach 2:
The magnetic composite structure acts as an intermediary between the magnetic probe and the polyimide liquid droplets. This intermediary structure translates magnetic field variations into precise droplet positioning and distribution, enabling uniform film formation while maintaining the efficiency of microdroplet delivery
3Shape
If border area width is reduced for ultra-narrow bezels, then display quality is improved, but coating control difficulty increases due to reduced design space
Solution Approach 1:
The patent replaces complex mechanical coating control systems with a magnetic field-based approach. The magnetic probe can precisely control polyimide liquid distribution in ultra-narrow border areas through magnetic field gradients, eliminating the need for complex mechanical positioning and retention wall structures, thereby reducing design space requirements while maintaining coating precision
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 magnetic composite structure enhances the uniformity and precision of the alignment film, addressing issues of uneven edges and light leakage, and is suitable for high-end displays with ultra-narrow bezels by ensuring uniform droplet distribution and improved display uniformity.
Implementation Method 1
controlling the magnetic probe to be turned on, so that the magnetic probe interacts with the magnetic composite structure, thereby forming an alignment film having a uniform thickness
Data Source
AI summary
The present disclosure provides a display panel and a method for preparing same, and a display device. The preparation method includes steps of: providing a base plate, wherein the base plate includes a display area and a binding area, and a magnetic composite structure is disposed in the base plate; disposing a magnetic probe at a position on a side of the base plate that corresponds to the binding area; and adding droplets to an upper surface of the base plate, and controlling the magnetic probe to be turned on, so as to form an alignment film having a uniform thickness on the upper surface of the base plate.