Liquid Crystal Dispensing Apparatus Guide Bar Positioning
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Solution Overview
Problem
Existing liquid crystal dispensing methods for LCD fabrication, such as dipping and vacuum injection, are inefficient due to long processing times and excessive material waste, as they require large amounts of liquid crystal material that can become contaminated during handling.
Innovation Solution
A liquid crystal dispensing apparatus and method that allows for direct dispensing of liquid crystal material onto substrates using a dispenser mounted on a guide bar, enabling precise control over dispensing positions and amounts, reducing material usage and contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dipping or vacuum injection methods are used to inject liquid crystal material, then liquid crystal material can be introduced into the cell gap, but processing time becomes excessively long and material waste increases
Solution Approach 1:
The liquid crystal material is pre-loaded into a container that is integrated with the injection hole structure. The container is positioned and sealed before the actual injection process, allowing for rapid and controlled material delivery without the need for complex in-situ filling operations, thus reducing processing time and material waste
Solution Approach 2:
The liquid crystal material storage and delivery function is extracted from the traditional vacuum injection system and integrated into a self-contained container mechanism. This separate container can be quickly positioned, sealed, and emptied directly into the cell gap, eliminating the time-consuming vacuum chamber operations and reducing material exposure to contamination
2Quantity of substance
If large amounts of liquid crystal material are used in dipping methods, then the cell gap can be filled, but material contamination during handling increases
Solution Approach 1:
A disposable or single-use container for liquid crystal material is employed. This container is designed to be opened only at the moment of injection and then discarded, eliminating the need to handle large quantities of material repeatedly. The container can be pre-sealed to prevent contamination and is quickly emptied directly into the cell gap, minimizing exposure to harmful factors
Solution Approach 2:
The container acts as an intermediary between the liquid crystal material source and the cell gap. It provides a controlled, sealed environment for material storage and delivery, preventing direct exposure of the material to contaminants while allowing precise control over the amount injected into the cell gap
3Ease of operation
If traditional injection methods are used, then liquid crystal material can be dispensed, but precise control over dispensing positions and amounts is difficult
Solution Approach 1:
The system incorporates feedback mechanisms to monitor and control the dispensing process. Sensors detect the position of the container and the amount of material remaining, allowing the control system to adjust the injection parameters in real-time to achieve precise control over both dispensing position and amount, ensuring accurate material placement in the cell gap
Data Source
AI summary
A liquid crystal dispensing method includes loading a substrate onto a stage, aligning at least one liquid crystal dispenser coupled to a guide bar with a dispensing position on the substrate, dispensing liquid crystal material onto the substrate, and unloading the substrate from the stage.