Curved Liquid Crystal Panel Edge Grinding via Substrate Bonding
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Solution Overview
Problem
The existing methods for producing liquid crystal panels with non-rectangular outlines, such as curved shapes, are inefficient and prone to cracking due to stress during the scribing process, making it difficult to achieve high precision and requiring lengthy processing times.
Innovation Solution
A method involving the use of a sealing agent to bond substrates, followed by cutting and grinding processes that form the edge surfaces collectively, reducing the likelihood of cracking and shortening the production time while maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the scribing method is used to process the edge surface of each panel area, then the outline shape can be formed, but cracks are likely to be produced on the edge surface due to stress
Solution Approach 1:
The patent replaces the scribing method (mechanical cutting) with a grinding method to process the edge surfaces. The grinding process uses an abrasive wheel to gradually remove material and form the curved outline, avoiding the high stress concentration that occurs during scribing. This substitution eliminates cracks while achieving the desired curved shape with high precision.
2Quantity of substance
If the mother substrate includes a large number of panel areas and each is processed individually, then each panel can be produced, but the processing time becomes excessively long
Solution Approach 1:
The patent combines multiple individual panel processing operations into a single collective grinding operation. After cutting the bonded substrate into multiple panel areas, all panels are processed together in one grinding step to form their curved edge surfaces. This merging of operations dramatically reduces processing time compared to treating each panel separately.
3Shape
If curved outlines are produced using conventional methods, then non-rectangular display panels can be made, but high precision is difficult to achieve due to stress-induced cracking
Solution Approach 1:
The patent replaces the scribing method with a grinding method specifically for forming curved outlines. The grinding process applies controlled abrasive removal that gradually shapes the curved edge without creating the stress concentration points that lead to cracking. This enables high-precision curved outlines to be produced reliably.
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
This method allows for the efficient and precise production of liquid crystal panels with curved outlines by bonding and grinding substrates collectively, reducing processing time and minimizing cracks, thereby improving the overall production efficiency and accuracy.
Implementation Method 1
a bonding process of bonding the substrates via the sealing agent portions
Implementation Method 2
a grinding process of collectively grinding the substrates in a pair that are outside the thin film pattern
Data Source
AI summary
A producing method includes a sealing agent portion disposing process of disposing sealing agent portions 40, a part of which is cut off, on one 30A of substrates, a bonding process of bonding the substrates 20A, 30A via the sealing agent portions 40, a first cutting process of cutting a bonded substrate into pieces each having thin film patterns arranged linearly, a liquid crystal injection process of collectively injecting liquid crystals 18A into a space within each of the sealing agent portions 40 through inlets 40A, a sealing process of sealing the inlets 40A with sealing resin, a second cutting process of cutting each piece of the bonded substrate into bonded substrate pieces, and a grinding process of collectively grinding the substrates included in the bonded substrate pieces that are outside the thin film patterns along an outline such that edge surfaces of the liquid crystal panels having curved outlines are collectively formed.