Liquid Crystal Mother Substrate Vertical Alignment Curing
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Solution Overview
Problem
Conventional vertical alignment curing technologies for liquid crystal displays face issues with space consumption by metal wires and impedance discontinuity, leading to failures in etching and forming, especially in high-density board layouts like 49UD Tri-gate and MMG 43&22 designs.
Innovation Solution
A liquid crystal mother substrate with a transparent electrode layer that is cut into sub electrode layers, allowing for individual curing of liquid crystal substrates without the need for metal wires and signal inputting ends, and a method where these sub electrode layers are electrically connected to apply voltages for vertical alignment curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal wires are used for signal inputting ends in conventional vertical alignment curing, then voltage can be applied to cure the liquid crystal, but the metal wires consume considerable space and extend out of the film forming insurance region causing impedance discontinuity and etching failures
Solution Approach 1:
The patent extracts and removes the metal wires and metal balls from the system entirely. Instead of using conventional metal wire signal inputting ends, the invention uses transparent conductive electrodes patterned directly on the substrate to apply voltage for vertical alignment curing. This eliminates the space-consuming metal wires that extend beyond the film forming region while maintaining the voltage application function.
Solution Approach 2:
The patent replaces the mechanical metal wire system with a transparent conductive electrode system. The transparent conductive electrodes are formed through thin film deposition and patterning processes, substituting the mechanical wire-bonding approach with a planar, integrated electrical connection method that avoids impedance discontinuity and etching issues.
2Ease of manufacture
If metal wires are used for signal inputting ends, then voltage can be conducted to the color filter substrate, but the layouts with high large board usage rate (at least 95%) experience impedance discontinuity due to ununiform film material
Solution Approach 1:
The transparent conductive electrodes serve multiple functions: they provide electrical connection for voltage application, maintain uniform impedance across the entire substrate area, and are fully integrated within the film forming region. This universal approach eliminates the need for separate metal wire routing while supporting high large board usage rate layouts.
Solution Approach 2:
The patent changes the electrical parameters by using transparent conductive electrodes with controlled sheet resistance and geometry to maintain uniform impedance across the substrate. This replaces the variable impedance of metal wires with a consistent, predictable electrical characteristic that works uniformly across high-density layouts.
3Device complexity
If conventional vertical alignment curing with single voltage is used, then the process is simple, but it cannot enable individually curing of different liquid crystal substrates in multi-model glass products
Solution Approach 1:
The patent segments the transparent conductive electrode into multiple independently controllable regions or patterns. This segmentation allows different voltage signals to be applied to different areas of the substrate, enabling individual curing of different liquid crystal substrates while maintaining a relatively simple overall device structure.
Solution Approach 2:
The patent introduces dynamic voltage control capability where the voltage applied to different regions can be independently adjusted in magnitude and timing. This dynamic control enables flexible curing strategies for multi-model glass products while keeping the hardware complexity low through software-controlled voltage modulation.
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 saves space, increases the usage rate of the thin film transistor substrate, and enables efficient vertical alignment curing for multi-model glass (MMG) products by eliminating the need for metal wires and improving alignment consistency.
Implementation Method 1
vertical light alignment curing is required. In other words, while the liquid crystal mother substrate is applied with a voltage, ultraviolet (UV) light radiation is applied causing a monomer reaction inside the liquid crystal panel such that liquid crystal alignment is achieved
Implementation Method 2
ultraviolet (UV) light radiation is applied causing a monomer reaction inside the liquid crystal panel such that liquid crystal alignment is achieved
Data Source
AI summary
A liquid crystal mother substrate and a vertical alignment curing method thereof are provided and has one or more first color filter common electrode alignment signal inputting ends electrically connected to one or more sub electrode layers. One or more second color filter common electrode alignment signal inputting ends are electrically connected to another one or more sub electrode layers. The advantage of the liquid crystal mother substrate is that usage rate of the substrate is increased, and the liquid crystal substrate may be vertical alignment cured individually.