Roll-Based Sealant Dispenser for LCD Alignment Protection
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Solution Overview
Problem
Current sealant dispensing methods for LCD devices, such as screen-mask printing and sealant dispensing, are costly and damage the alignment layer, while also increasing manufacturing time and reducing yield.
Innovation Solution
A sealant dispensing apparatus with a roll, sealant-receiving cavities, and a sealant outlet connected to prevent alignment layer damage and reduce manufacturing time, using a roll to dispense sealant directly onto substrates without a high-priced screen mask.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If screen-mask printing method is used to dispense sealant, then sealant can be applied with predetermined pattern, but manufacturing cost increases due to high-priced mask and alignment layer may be damaged by mask contact
Solution Approach 1:
The patent extracts and eliminates the screen mask component from the sealing apparatus. Instead of using a mask that contacts the alignment layer, the invention uses a sealant dispenser with a sealant supply chamber and dispensing nozzle that delivers sealant without requiring a mask, thereby reducing manufacturing cost while maintaining pattern precision through controlled dispensing
Solution Approach 2:
The patent introduces a sealant dispenser as an intermediary device between the sealant supply and the substrate. The dispenser includes a sealant supply chamber and a dispensing nozzle that controls sealant flow, serving as a mediator that eliminates the need for direct mask-substrate contact while maintaining precise sealant application
2Manufacturing precision
If screen-mask printing method is used to dispense sealant, then sealant can be applied with predetermined pattern, but alignment layer may be damaged by mask contact
Solution Approach 1:
The patent removes the screen mask component that causes alignment layer damage. The sealant dispenser directly applies sealant through a dispensing nozzle without requiring mask contact, eliminating the harmful factor of mask alignment layer interaction while maintaining pattern precision through controlled dispensing
Solution Approach 2:
The sealant dispenser acts as an intermediary that prevents direct contact between the patterning process and the alignment layer. The dispensing nozzle delivers sealant in a controlled manner without requiring mask placement, thereby protecting the alignment layer from damage while achieving precise sealant patterns
3Ease of manufacture
If sealant dispensing method is used without screen mask, then manufacturing cost decreases, but process time increases and yield decreases
Solution Approach 1:
The patent implements preliminary action by pre-filling the sealant supply chamber before the dispensing process. The sealant is loaded into the supply chamber in advance, allowing for continuous and efficient dispensing without interruptions, thereby increasing manufacturing speed while maintaining cost-effectiveness
Solution Approach 2:
The patent ensures continuity of useful action through the sealant dispenser design that allows uninterrupted sealant delivery. The dispensing nozzle maintains continuous sealant flow during the sealing process, eliminating idle time and enhancing productivity while keeping manufacturing costs low compared to mask-based methods
Data Source
AI summary
A sealant dispensing apparatus and a method for manufacturing an LCD device using the same is disclosed, to decrease manufacturing time of an LCD device with low manufacturing cost, wherein the sealant dispensing apparatus comprises a roll; a sealant-receiving cavity formed inside the roll; a sealant outlet connected with the sealant-receiving cavity; and a sealant inlet connected with the sealant-receiving cavity.