Flexible Display Substrate Groove Design for PI Inkjet Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inkjet printing of polyimide (PI) droplets onto flexible display substrates faces challenges in reaching small pixels due to surface tension and frame elevation, leading to poor alignment and defects like bright spots or edge lines, as the PI liquid struggles to flow into smaller pixels.
Innovation Solution
Creating grooves in the light shielding layer using a photomask to facilitate communication between adjacent pixels, allowing the PI liquid to flow into smaller pixels, which improves alignment and reduces defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inkjet printing is used to deposit PI droplets onto the substrate, then patterned deposition with high precision and low material waste is achieved, but the PI liquid fails to flow into smaller pixels due to surface tension and frame elevation, causing poor alignment and display defects
Solution Approach 1:
The light shielding layer is segmented by creating grooves that divide it into regions corresponding to different pixel sizes. These grooves allow PI liquid to flow from larger pixel regions into smaller pixel regions, solving the problem of incomplete filling in small pixels while maintaining the precision of inkjet printing deposition patterns
Solution Approach 2:
Grooves are introduced as intermediary structures in the light shielding layer that facilitate the flow of PI liquid between adjacent pixels. These grooves act as channels that mediate the transfer of liquid from areas where it accumulates (larger pixels) to areas where it is needed but difficult to reach (smaller pixels)
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 enhances the ability of PI liquid to flow into smaller pixels, improving display quality and production yields by ensuring uniformity and reducing defects such as bright spots and edge lines.
Implementation Method 1
the PI liquid in adjacent pixels flows into the pixels which the PI liquid is difficult to enter
Data Source
AI summary
The present invention provides a substrate and a manufacturing method of the substrate. The substrate includes: a glass base plate; a first base layer on the glass base plate; a light shielding layer on the first base layer; multiple pixel units placed on the first base layer, the pixel units including at least one light transmissive region; and a photomask for exposing the light shielding layer. The photomask is used to expose, develop, and etch away a portion of the light shielding layer on the pixel units which need to communicate with each other, so that multiple grooves are formed in the light shielding layer to make the pixel units communicate with each other.