Liquid Guiding Grooves for Precise Inkjet Pixel Placement
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Solution Overview
Problem
Inkjet printing devices struggle with cross contamination of light between adjacent pixels and pixel absence due to low precision, which restricts the development of high-quality display devices like OLED and QLED.
Innovation Solution
A liquid guiding component with multiple grooves, each having an inlet and outlet end, and a connecting groove wall with specific surface features to accurately direct ink flow, preventing deviation and enhancing printing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional inkjet printing is used, then the operation is simple and mass production is conducive, but the printing accuracy is insufficient causing cross contamination and pixel absence
Solution Approach 1:
The patent introduces a liquid guiding component as an intermediary element between the inkjet nozzle and the substrate. This component includes groove structures that guide the liquid ink from the inlet to the outlet, ensuring precise deposition. The groove wall with downhill surface acts as a mediator to control liquid flow direction, preventing cross-contamination while maintaining the simplicity of the inkjet printing process.
Solution Approach 2:
The liquid guiding component is segmented into multiple independent groove structures, each with its own inlet and outlet. This segmentation allows independent control of liquid flow paths for different pixels or regions, preventing cross-contamination between adjacent printing areas while maintaining overall system simplicity.
2Manufacturing precision
If printing accuracy is increased to prevent cross contamination, then image quality improves, but the device complexity increases
Solution Approach 1:
The liquid guiding component applies local quality by providing different surface characteristics in different regions. The groove wall has a downhill surface with specific surface energy characteristics that locally guide liquid flow, while other regions maintain different properties. This localized optimization achieves high printing accuracy without requiring complex device-wide modifications.
3Reliability
If liquid flow is precisely controlled to avoid pixel absence, then printing reliability improves, but the device structure becomes more complex
Solution Approach 1:
The liquid guiding component utilizes the inherent properties of liquid flow and surface energy to achieve self-guided flow control. The downhill surface on the groove wall creates a natural gradient that guides liquid from inlet to outlet without requiring external actuation or complex control mechanisms, thereby improving reliability while maintaining structural simplicity.
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 liquid guiding component improves inkjet printing accuracy by ensuring precise ink placement, reducing cross contamination and pixel absence, thereby enabling higher precision in display device production.
Implementation Method 1
the surface energy of all or part of the inner surface of the groove walls is less than or equal to 20 dyn/cm... the inner surface including at least one section of downhill surface
Data Source
AI summary
The present disclosure provides a liquid guiding component and a using method and application thereof. The liquid guiding component includes a plurality of liquid guiding grooves, each of which includes at least one inlet end, at least one outlet end, and a groove wall connecting the inlet end and the outlet end, the liquid guiding component includes a first side and a second side arranged opposite to each other, each of said inlet ends is arranged as liquid inlet on the first side and each of the outlet ends is arranged as the liquid outlet on the second side, and the liquid guiding grooves are used to transport liquid from the inlet ends to the outlet ends. The liquid guiding component can be used to precisely control the movement direction of the ejected ink.