Display Substrate Guide Bars for Uniform Ink Distribution
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Solution Overview
Problem
The ink-jet printing process struggles to achieve uniform thickness and high resolution in medium-size or small-size display devices, leading to instability and poor printing quality, especially due to limitations in material distribution across pixel regions.
Innovation Solution
A display substrate with a pixel definition layer that includes guide bars and guide grooves between adjacent pixel regions, allowing uniform ink distribution through the ink-jet printing process, ensuring consistent thickness and improved printing quality across all pixel groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the ink-jet printing process is used to form common layer structures in medium-size or small-size display devices, then material utilization is improved, but the thickness uniformity and printing resolution deteriorate
Solution Approach 1:
The pixel definition layer is segmented into multiple layers: a first pixel definition layer and a second pixel definition layer. The first pixel definition layer contains guide bars that extend between adjacent pixel regions, while the second pixel definition layer is formed later to complete the pixel definition structure. This segmentation allows the guide bars to be formed first to guide ink flow, then the second layer is added to finalize pixel boundaries, achieving both material efficiency and thickness uniformity
Solution Approach 2:
The guide bars are formed in advance within the first pixel definition layer before the actual pixel definition is completed. These guide bars serve as preliminary structures that guide the ink material during the printing process, ensuring uniform thickness distribution across pixel regions before the final pixel definition layer is formed
2Loss of substance
If the ink-jet printing process is used to form common layer structures in medium-size or small-size display devices, then material utilization is improved, but printing resolution deteriorates
Solution Approach 1:
The pixel definition layer is divided into multiple layers with guide bars in the first layer and complete pixel definition in the second layer. This segmentation enables the guide bars to pre-establish ink flow paths for high resolution, while the two-layer structure maintains material efficiency by forming common layer structures across pixel regions
Solution Approach 2:
The guide bars act as intermediary structures between the ink material and the final pixel definition. These guide bars are formed first to mediate the ink flow during printing, ensuring high resolution material distribution, then the second pixel definition layer is formed to complete the pixel boundaries while maintaining the resolution achieved by the guide bars
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 solution enables high-resolution ink-jet printing for both large-size, medium-size, and small-size display devices, ensuring uniform thickness and enhanced display effects by guiding ink flow effectively across the substrate, overcoming previous size-related limitations.
Implementation Method 1
a guide groove is formed between two adjacent guide bars... enabling the ink material to be uniformly distributed at all the pixel regions in each pixel group under the effect of each guide groove
Data Source
AI summary
A display substrate, a manufacturing method thereof and a display device are provided. Pixel regions of the display substrate are divided into a plurality of pixel groups, and a plurality of guide bars is arranged at a surface of a pixel definition layer between at least parts of adjacent pixel regions in each pixel group. A guide groove is formed between two adjacent guide bars, so as to guide the flow of ink, thereby to enable the ink to be uniformly distributed at all the pixel regions in each pixel group.