Liquid Crystal Display Panel Cutting via Thermal Steam Separation
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Solution Overview
Problem
The existing methods for cutting liquid crystal display panels from large-scale mother substrates are time-consuming and prone to damage, generating glass chips, and often result in incomplete crack propagation, which reduces productivity and increases the risk of panel damage.
Innovation Solution
A method involving a transfer unit with suction members and a steam generator is used to form prearranged cut lines on both surfaces of the mother substrates, followed by steam application to propagate cracks and separate the panels without physical striking, thereby reducing processing time and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If physical striking methods are used to separate panels from mother substrates, then crack propagation can be achieved, but processing time increases and panel damage occurs
Solution Approach 1:
The patent replaces the traditional mechanical striking method with a thermal field method. A heating device applies localized heat to the cut line area, causing thermal expansion and stress that propagates cracks along the pre-formed cut lines. This substitution of mechanical action with thermal action eliminates the need for physical impact, thereby reducing processing time and preventing panel damage while achieving complete crack propagation.
Solution Approach 2:
The patent changes the physical parameter from mechanical force to temperature. By controlling the temperature distribution through the heating device, the method creates controlled thermal stress that promotes crack propagation along the desired cut lines. This parameter change allows for precise control of the separation process, improving both productivity and reliability by eliminating the randomness associated with mechanical striking.
2Ease of manufacture
If traditional cutting methods are used, then panels can be separated from mother substrates, but glass chips are generated and manufacturing precision decreases
Solution Approach 1:
The patent replaces mechanical striking with thermal field application. The heating device selectively heats the glass along the cut lines, causing controlled thermal stress that propagates cracks cleanly along the pre-formed lines. This thermal approach eliminates the chaotic mechanical impact that generates glass chips, thereby maintaining ease of manufacture while significantly improving manufacturing precision by producing clean, chip-free panel separations.
3Productivity
If crack propagation is incomplete in traditional methods, then processing time is reduced, but panel integrity is compromised
Solution Approach 1:
The patent uses thermal field application instead of mechanical striking to ensure complete and uniform crack propagation. The heating device can be moved along the cut lines, applying consistent thermal stress that ensures cracks propagate completely along the entire length of the cut. This controlled thermal approach maintains panel integrity by avoiding the incomplete or uneven crack propagation that can occur with mechanical methods, thereby improving both productivity and reliability simultaneously.
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 approach significantly shortens the cutting time, prevents damage to the panels, and ensures complete separation without glass chips, enhancing the manufacturing efficiency and panel integrity.
Implementation Method 1
spraying steam onto the surface of the mother substrates through the steam generator of the transfer unit
Implementation Method 2
a body having a plurality of suction members
Data Source
AI summary
A method for cutting a liquid crystal display panel includes transferring a pair of mother substrates on which a plurality of panel regions have been disposed to a scribing unit; forming first and second prearranged cut lines on front and rear surfaces of the mother substrates using a scribing unit; transferring the mother substrates with the first and second prearranged cut lines formed thereon to a breaking component; and moving a transfer unit which includes a body having a plurality of suction members and a steam generator installed at an edge of the body to an upper side of the mother substrates, and separating liquid crystal display panels formed at the panel regions from a dummy glass therearound while spraying steam onto the surface of the mother substrates through the steam generator of the transfer unit.