Display Panel Groove Structure to Prevent Light-Shielding Creep
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Solution Overview
Problem
Existing microLED display panels face issues with low light-emitting efficiency due to the light-shielding layer creeping onto the light-emitting elements, obstructing light emission and degrading display performance.
Innovation Solution
A groove structure is incorporated into the insulating layer to accommodate part of the light-shielding layer, preventing it from creeping onto the light-emitting elements by filling the groove first during inkjet printing, thereby maintaining light-emitting efficiency and enhancing display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light-shielding layer is directly formed on the insulating layer surface, then the light-shielding effect is improved, but the light-emitting efficiency deteriorates due to creeping onto the light-emitting element
Solution Approach 1:
The insulating layer surface is segmented into groove structures and flat regions. The groove structures are positioned around the light-emitting element to contain the light-shielding layer material, preventing it from creeping onto the element while maintaining the light-shielding function in non-emitting areas.
Solution Approach 2:
The groove structures act as intermediary containment features between the light-shielding layer and the light-emitting element. These grooves serve as a physical barrier that mediates the interaction between the semi-fluid light-shielding material and the light-emitting element, preventing direct contact and creeping.
2Manufacturing precision
If the light-shielding layer is formed using inkjet printing with semi-fluid material, then the manufacturing precision is improved, but the light-shielding layer creeps onto the light-emitting element due to fluid flow
Solution Approach 1:
The groove structures are pre-formed on the insulating layer surface before the light-shielding layer is deposited. This preliminary action creates predetermined containment regions that guide the semi-fluid material during inkjet printing, ensuring it fills the grooves first and establishes a fluid level difference that prevents creeping onto the light-emitting element.
Solution Approach 2:
The groove structures change the physical parameters of the light-shielding layer deposition process by creating localized volume constraints. This alters the fluid dynamics of the semi-material, causing it to preferentially fill the groove volumes first, thereby controlling its spread and preventing unwanted creeping onto the light-emitting element.
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 groove structure design effectively lowers the probability of the light-shielding layer blocking light emission from the sidewall of the light-emitting elements, ensuring higher light-emitting efficiency and improving the overall display effect of the panel.
Implementation Method 1
the probability of the light-shielding layer creeping onto the sidewall of the light-emitting element due to the capillary effect caused by a microstructure on the upper surface of the light-emitting element is lowered
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a base substrate, an insulating layer located on one side of the base substrate in a thickness direction, where the surface of one side of the insulating layer facing away from the base substrate is provided with a groove structure, a light-shielding layer and a light-emitting element that are located on the side of the insulating layer facing away from the base substrate, where the orthographic projection of the light-shielding layer on the base substrate is at least located around the orthographic projection of the light-emitting element on the base substrate, and at least part of the light-shielding layer is located within the groove structure. As such, the groove structure is formed so that a light-shielding material can be accommodated within the groove structure during inkjet printing.