LCD Sealant Inlet for Liquid Crystal Volume Control
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Solution Overview
Problem
The challenge in manufacturing liquid crystal display (LCD) devices is accurately determining and regulating the amount of liquid crystal to prevent unfilled or overfilled regions, which affects picture quality and increases costs due to discarded panels.
Innovation Solution
A method involving a liquid crystal cell with substrates, a liquid crystal layer, and a sealant with a predetermined portion for forming an inlet for inflow and outflow, allowing for precise regulation and sealing of the liquid crystal amount using a finish to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid crystal is dispensed onto substrates before bonding, then large panels can be manufactured efficiently, but it is difficult to determine the precise amount of liquid crystal needed due to various environmental conditions
Solution Approach 1:
The patent applies preliminary action by forming an inlet in the sealant before dispensing the liquid crystal. This allows the liquid crystal amount to be regulated through the inlet during or after dispensing, ensuring precise control of the liquid crystal volume while maintaining the efficiency of the dispensing method for large panel manufacturing
2Device complexity
If an insufficient amount of liquid crystal is provided, then the manufacturing process is simplified, but unfilled regions occur in the LCD panel degrading picture quality
Solution Approach 1:
The patent implements feedback by providing an inlet that allows monitoring and adjustment of the liquid crystal amount. If the liquid crystal level is insufficient, additional liquid crystal can be supplied through the inlet, and if excessive, liquid crystal can be discharged, ensuring proper filling without degrading picture quality
3Reliability
If an excessive amount of liquid crystal is provided, then the liquid crystal can fill all regions, but overfilled regions occur in the LCD panel degrading picture quality
Solution Approach 1:
The inlet structure enables feedback control by allowing excess liquid crystal to be discharged through the same inlet used for dispensing. This prevents overfilling and the associated picture quality degradation while maintaining reliable liquid crystal coverage across the panel
4Ease of manufacture
If the liquid crystal amount is not precisely controlled, then the manufacturing process is simpler, but unfilled or overfilled regions cause panels to be discarded increasing cost
Solution Approach 1:
The patent applies preliminary action by pre-forming the inlet in the sealant before liquid crystal dispensing. This preliminary structure enables precise liquid crystal amount control through regulated dispensing and potential adjustment, thereby reducing panel discards and improving manufacturing yield without significantly complicating the overall process
Data Source
AI summary
An LCD device and a method for manufacturing the same is disclosed, the method including preparing a liquid crystal cell including: a first substrate, a second substrate, a liquid crystal layer formed between the first and second substrates, and a sealant surrounding the liquid crystal layer and having a predetermined portion corresponding a cutting line; forming an inlet for the inflow and outflow of liquid crystal in the sealant; regulating the amount of liquid crystal through the inlet; and sealing the inlet.