Liquid Crystal Display Sealing Member with Segmented Junction
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Solution Overview
Problem
Existing methods for manufacturing liquid crystal devices face challenges in achieving a uniform cell gap and reliable sealing, particularly with the use of dispensers, which often result in defective cell gaps and complex control processes, leading to increased production time and variability in sealant formation.
Innovation Solution
A method involving the formation of a ring-shaped sealing member with a junction portion that blocks the liquid crystal layer, where the first and second sealing layers are formed to be separated and joined outside the ring-shaped portion, allowing for uniform cell gap maintenance and reduced production time by simplifying the control of the dispenser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a dispenser is used to form the sealant, then the sealant can be ejected in a predetermined pattern, but the previously ejected sealant and subsequently ejected sealant overlap, making it difficult to stably form the sealant and requiring complex control
Solution Approach 1:
The sealant formation process is segmented into two distinct phases: forming the ring-shaped portion and forming the junction portion. This segmentation allows each phase to be controlled independently, simplifying the overall dispenser control while maintaining stable sealant formation. The ring-shaped portion is formed first, then the junction portion is formed separately to connect the ends.
Solution Approach 2:
The ring-shaped portion of the sealant is formed in advance before forming the junction portion. This preliminary action allows the main body of the sealant to be established first, and then the connecting portions are added to complete the sealed structure, reducing the complexity of coordinating the entire formation process simultaneously.
2Shape
If the sealant is formed by a dispenser with overlapping ejections, then the sealant can be formed in a ring shape, but the junction portion becomes complex and production time increases
Solution Approach 1:
The sealant formation is divided into two separate operations: forming the ring-shaped portion and forming the junction portion. This segmentation simplifies the control process and reduces production time by allowing each portion to be formed efficiently without complex coordination.
Solution Approach 2:
Instead of forming the complete ring-shaped sealant first and then adding junction portions, the invention forms the ring-shaped portion first and then adds the junction portions to connect the ends. This inverted approach simplifies the formation process and reduces the complexity of controlling overlapping ejections.
3Productivity
If the sealant is formed with overlapping ejections, then the sealant can be formed continuously, but the width varies and uniform cell gap cannot be obtained
Solution Approach 1:
The sealant formation is segmented into the ring-shaped portion and the junction portion, with each portion having a specific function. The ring-shaped portion provides continuous sealing, while the junction portion provides structural connection. This segmentation allows each portion to be optimized for its specific purpose, ensuring uniform width and cell gap.
Solution Approach 2:
Different portions of the sealant are given different qualities and functions: the ring-shaped portion is optimized for continuous sealing with uniform width, while the junction portion is optimized for connecting the ends with appropriate thickness. This local quality approach ensures that each portion meets its specific requirements without compromising the overall uniformity.
4Ease of operation
If a ring-shaped sealant without injection hole is used, then the liquid crystal dropping process can be simplified, but the junction portion formation becomes complex requiring precise control
Solution Approach 1:
The sealant is segmented into the ring-shaped portion that provides the sealed chamber for liquid crystal and the junction portion that connects the ends. This segmentation simplifies the liquid crystal dropping process by providing a clear sealed chamber, while the junction portion is formed separately with simplified control requirements.
Solution Approach 2:
The ring-shaped portion of the sealant is formed in advance to create the sealed chamber, allowing liquid crystal to be dropped without complex coordination. The junction portion is then added later to complete the sealed structure, reducing the control complexity during the liquid crystal dropping process.
Data Source
AI summary
A method of manufacturing a liquid crystal device having a first substrate and a second substrate facing each other with a liquid crystal layer interposed therebetween, and a sealing member formed in a peripheral portion of at least one of the substrates. The method includes forming the sealing member, disposing the liquid crystal layer inside the sealing member, and bonding the first substrate to the second substrate. In forming the sealing member, a ring-shaped portion that seals the liquid crystal layer inside the sealing member, a first sealing layer and a second sealing layer that face each other to be separated from each other are formed. In the bonding of the first substrate to the second substrate, a junction portion is formed in which the first and second sealing layers are pressed and joined outside the sealing member so as to form the ring-shaped portion.