Liquid Crystal Display Cutting Method Minimizing Bezel Width
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Solution Overview
Problem
The existing cutting methods for liquid crystal panels face challenges in minimizing the bezel width, preventing crack formation on the incision surface, and preventing gas from entering the display area, especially in the context of portable electronic devices where thinness, low weight, and small bezel dimensions are crucial.
Innovation Solution
A cutting method that involves irradiating a laser to create empty spaces in the sealant between the mother substrates, allowing the cutting wheel to pass through these spaces and minimize bezel width while ensuring the gas generated during the process is directed away from the display area, thereby preventing cracks and gas ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the cutting wheel directly cuts through the sealant to minimize bezel width, then the bezel width is reduced, but cracks form on the incision surface due to the adhesion between the cutting wheel and sealant
Solution Approach 1:
The sealant is irradiated with a laser before the cutting wheel passes through it. This preliminary laser irradiation creates a groove in the sealant along the cutting path, removing or softening the sealant material in advance. When the cutting wheel then passes through this pre-prepared groove, it encounters minimal resistance and adhesion, preventing crack formation on the incision surface while still achieving minimal bezel width.
2Manufacturing precision
If the laser irradiates the sealant to create empty spaces for cutting, then the incision surface quality is improved, but gas generated during laser irradiation may flow into the display area
Solution Approach 1:
The laser irradiation is designed to create empty spaces or grooves in the sealant that are specifically positioned and shaped to extract or redirect the gas generated during irradiation. The groove geometry and positioning ensure that gas is channeled away from the display area, preventing gas ingress while maintaining the benefits of pre-cutting preparation.
3Area of moving object
If the bezel width is minimized by cutting closer to the display area, then the display area to bezel ratio is improved, but the risk of gas flowing into the display area increases
Solution Approach 1:
The laser-created groove in the sealant acts as an intermediary structure between the laser irradiation zone and the display area. This groove serves as a controlled pathway that manages gas flow, allowing the cutting operation to proceed close to the display area for minimal bezel width while the groove structure mediates and directs gas away from the display area, preventing harmful gas ingress.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively reduces bezel width, prevents crack formation, and ensures that gases generated during the cutting process are discharged into a dummy region, maintaining the integrity and functionality of the liquid crystal display.
Implementation Method 1
firstly irradiating a laser to the sealant; secondly irradiating the laser to a region closer to the unit liquid crystal panel than a position of the first laser irradiation of the sealant
Data Source
AI summary
A mother substrate assembly according to an exemplary embodiment of the present invention includes: a first mother substrate and a second mother substrate formed with a plurality of unit liquid crystal panels; and a sealant formed between the first mother substrate and the second mother substrate and combining the mother substrates, wherein the sealant encloses a circumference of each unit liquid crystal panel, and includes a first irradiation line formed in the sealant, and a second irradiation line formed in the sealant of a side closer to the unit liquid crystal panel than the first irradiation line.