Display Substrate Separation Bank with Light-Transmitting Grooves
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In quantum dot OLED panels, the separation bank's thickness limitations due to light-shielding materials prevent full curing, leading to potential defects and color crosstalk, as UV light cannot penetrate thick light-shielding materials, and the thickness difference between separation banks and QD or fluorescent materials creates steps that hinder proper layer formation.
Innovation Solution
A display substrate with a separation bank composed of both light-transmitting and light-shielding bank patterns, where the light-transmitting bank pattern has a groove filled with light-shielding material, and a leveling layer fills the step between the color conversion pattern and separation bank to create a flat surface, reducing color crosstalk and ensuring complete curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the separation bank is made thicker to prevent color crosstalk, then light-shielding performance is improved, but UV light cannot penetrate the thick light-shielding material for complete curing
Solution Approach 1:
The separation bank is divided into two distinct parts: a lower light-shielding bank pattern made of light-shielding material for preventing color crosstalk, and an upper light-transmitting bank pattern made of light-transmitting material for allowing UV light penetration and complete curing. This segmentation resolves the contradiction by assigning different functions to different portions of the separation bank.
Solution Approach 2:
Different regions of the separation bank are assigned different optical properties: the lower portion near the color conversion layer has light-shielding properties to prevent color crosstalk, while the upper portion has light-transmitting properties to enable complete curing. This local differentiation of material properties resolves the contradiction between light-shielding performance and curing completeness.
2Object-affected harmful factors
If the separation bank thickness is increased to ensure light-shielding, then color crosstalk is reduced, but steps are formed that hinder proper layer formation
Solution Approach 1:
The separation bank structure transitions from a simple planar configuration to a multi-dimensional structure with the light-shielding bank pattern at the lower dimension (near the color conversion layer) and the light-transmitting bank pattern at the upper dimension (near the encapsulation layer). This dimensional arrangement allows the thick separation bank to provide light-shielding while the upper light-transmitting portion ensures complete curing and proper layer formation.
Solution Approach 2:
The separation bank is constructed as a composite structure combining light-shielding material and light-transmitting material in specific configurations. This composite approach allows the structure to simultaneously achieve light-shielding performance for color crosstalk prevention and light-transmitting properties for complete curing and proper layer formation.
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 reduces color crosstalk, ensures complete curing of the separation bank, and facilitates a flat surface for subsequent film layers, improving the quality of the display product by preventing light mixing and maintaining structural integrity.
Implementation Method 1
UV light cannot penetrate thick light-shielding materials
Implementation Method 2
ensure complete curing
Implementation Method 3
the light-shielding bank pattern is filled in the groove
Implementation Method 4
the leveling layer at least partially fills the first opening to fill the first step and form a flat surface
Data Source
AI summary
Display substrate, manufacturing method thereof and display device are provided. The display substrate includes: light-emitting substrate including light-emitting device, switch element and encapsulation layer; color conversion layer including separation bank, color conversion pattern and leveling layer, the separation bank defining first openings corresponding to pixels, including light-transmitting bank and light-shielding bank patterns, the light-transmitting bank pattern has grooves in which the light-shielding bank pattern is filled, the color conversion pattern is disposed in the first openings, the leveling layer is at least partially filled in the first opening to fill first step for forming flat surface away from the substrate; a color filtering layer including light-shielding and color filtering patterns, the light-shielding pattern defining second openings corresponding to the first openings in which the color filtering pattern is disposed in. The display substrate, manufacturing method thereof and the display device can improve the displaying quality.