Negative Liquid Crystal Display with Polymer Network
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Solution Overview
Problem
Current liquid crystal display panels using nematic liquid crystals are limited to specific modes like TN, FFS, and IPS, as negative liquid crystals have not been applied in these modes due to requirements for different alignment treatments.
Innovation Solution
A process involving mixing negative liquid crystals with UV polymerizable monomers and a photoinitiator, sealing the mixture in a liquid crystal cell, and using UV light and heat to create a macromolecular network that anchors the liquid crystal molecules, enabling the use of negative liquid crystals in TN, FFS, and IPS display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If negative liquid crystals are used in TN, FFS, or IPS display modes, then new display panels can be manufactured, but traditional plane alignment treatment is required which increases manufacturing complexity
Solution Approach 1:
The patent changes the physical-chemical parameters of the liquid crystal material by using negative liquid crystals instead of traditional positive liquid crystals. This parameter change enables the use of existing plane alignment treatment processes for TN, FFS, and IPS modes, thereby achieving versatility without increasing manufacturing complexity. The negative liquid crystal material maintains compatibility with conventional alignment layers and processing techniques.
2Reliability
If UV polymerizable monomers and photoinitiator are mixed with negative liquid crystals, then a macromolecular network can be formed to anchor liquid crystal molecules, but the mixing process becomes more complex
Solution Approach 1:
The patent creates a composite material system by combining negative liquid crystals with UV polymerizable monomers and photoinitiators. This composite approach forms a macromolecular network that anchors liquid crystal molecules, improving reliability. The composite material is designed to be mixed in a single step and cured through UV irradiation, avoiding complex multi-stage processing while achieving stable molecular anchoring.
3Reliability
If UV light and heat are applied to the liquid crystal display panel, then the liquid crystal molecules can be anchored effectively, but energy consumption increases
Solution Approach 1:
The patent utilizes phase transition processes during the manufacturing of the liquid crystal display panel. UV irradiation triggers photopolymerization, transforming monomers into a crosslinked macromolecular network. Subsequent heating completes the anchoring process by ensuring proper molecular orientation and network formation. These phase transitions occur during the fabrication stage, and once the panel is manufactured, no continuous energy input is required to maintain the anchoring effect, thus the energy consumption is limited to the manufacturing process rather than ongoing operation.
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
Enables the manufacture of new liquid crystal display panels that can rotate liquid crystal molecules in response to electric fields, achieving effective display performance with optimized transmissivity and reduced driving voltage.
Implementation Method 1
radiating the liquid crystal display panel using UV light... UV polymerizable monomers, and a photoinitiator
Implementation Method 2
heating the liquid crystal panel
Implementation Method 3
the electrophilic groups in the liquid crystal molecules will be affected by an electric field so as to cause the rotation of the liquid crystal molecules under the action of the electric field
Data Source
AI summary
A process for manufacturing a liquid crystal display panel comprises: mixing negative liquid crystals, UV polymerizable monomers, and a photoinitiator to obtain a liquid crystal mixture; sealing the liquid crystal mixture in a liquid crystal cell formed from an array substrate and an opposed substrate to form the liquid crystal display panel; and radiating the liquid crystal display panel using UV light and heating the liquid crystal panel.