Liquid Crystal Display Sealant Matrix Application for Clean Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display device manufacturing methods using a dispenser result in sealant remnants when cutting mother glass substrates into individual devices, reducing yield and increasing costs.
Innovation Solution
The method involves applying sealant in a matrix pattern on a mother glass substrate with alternating strokes to form crossing seal patterns, where the sealant applied in one stroke and the subsequent stroke intersect at device boundaries, with a larger radius of curvature at crossing points to prevent interference during cutting, and optionally using spacers at these points to facilitate cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sealant is applied in a conventional single-stroke pattern, then the application process is simple, but sealant remnants are formed during cutting reducing yield
Solution Approach 1:
The sealant application process is divided into multiple strokes instead of a single stroke. The sealing member is formed by sequentially applying sealant in a first stroke to create a first sealing part, then applying sealant in a second stroke to create a second sealing part that intersects the first. This segmentation eliminates remnants during cutting while maintaining manufacturing feasibility.
Solution Approach 2:
The sealing pattern transitions from a single-planar-stroke approach to a multi-dimensional intersecting pattern. The first and second sealing parts intersect to form X-shaped crossings at opposite corners, creating a three-dimensional seal structure that prevents remnant formation during the cutting dimension, thereby improving yield.
2Reliability
If sealant is applied to form complete sealing patterns, then sealing reliability is improved, but cutting precision is reduced due to remnant formation
Solution Approach 1:
The sealing member is segmented into multiple parts (first sealing part and second sealing part) formed by different strokes. This segmentation allows each part to be optimized for its function while ensuring that the intersecting pattern provides complete sealing without interfering with cutting precision.
Solution Approach 2:
Different regions of the sealing pattern have different properties. The X-shaped crossing regions provide enhanced sealing reliability through intersecting sealant paths, while the non-crossing regions are optimized for clean cutting. This local differentiation ensures both sealing reliability and cutting precision are achieved in their respective zones.
Data Source
Figure 1A~1C
Figure 2~3
Figure 4(a)~5
AI summary
A method for manufacturing a liquid crystal display device by applying a sealant using a dispenser to form plural seal patterns on a first substrate in a matrix, dropping liquid crystal, bonding a second substrate to the first substrate, and then cutting into individual liquid crystal display devices. A process of forming the seal patterns in a matrix includes (1)a first step of sequentially applying a sealant to one long side and one short side out of four sides of a seal pattern of each liquid crystal display device with a single stroke, and (2)a second step of sequentially applying the sealant to the remaining long side and the remaining short side out of the four sides of the seal pattern of each liquid crystal display device with a single stroke.