Liquid Crystal Display Device with Segmented Layers
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices face limitations in reducing the response time of liquid crystal molecules due to constraints on the liquid crystal cell gap and driving voltage, which affects the switching and restoration times of liquid crystal molecules, particularly in TN and IPS modes.
Innovation Solution
The solution involves dividing the liquid crystal layer into at least two layers, with polymer walls and layers formed by polymerizing photo curable monomers, allowing for a reduced effective cell gap recognized by the liquid crystal molecules while maintaining the total cell gap, thereby improving the response time without altering optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the liquid crystal cell gap is reduced, then the switching time of liquid crystal molecules decreases, but the manufacturing precision and structural stability deteriorate
Solution Approach 1:
The liquid crystal layer is divided into multiple sub-layers separated by polymer walls. Each sub-layer has a smaller effective cell gap (d1, d2, ..., dn) while the total cell gap (D) remains unchanged. This segmentation allows liquid crystal molecules in each sub-layer to respond faster to electric fields, reducing switching time without requiring the entire cell gap to be reduced, thus avoiding manufacturing precision issues.
2Loss of time
If the driving voltage is increased, then the response time of liquid crystal molecules decreases, but the power consumption increases
Solution Approach 1:
By dividing the liquid crystal layer into multiple sub-layers with smaller effective cell gaps, the patent reduces the response time without increasing voltage. The reduced effective gap in each sub-layer allows faster molecular response at the same driving voltage, thereby improving response time while avoiding increased power consumption.
3Loss of time
If the liquid crystal cell gap is reduced, then the switching time decreases, but the total cell gap maintenance and optical properties deteriorate
Solution Approach 1:
The patent segments the liquid crystal layer into multiple sub-layers separated by polymer walls. Each sub-layer has a reduced effective cell gap that improves switching time, while the sum of all sub-layer gaps plus polymer wall thicknesses maintains the original total cell gap (D). This preserves the optical properties and structural stability that depend on the total gap distance.
Solution Approach 2:
Different regions of the liquid crystal layer (different sub-layers) have different local effective cell gaps (d1, d2, ..., dn) optimized for fast switching, while the overall structure maintains the required total cell gap for optical performance. Each sub-layer can be independently optimized for response time while collectively maintaining system-level optical properties.
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 effectively reduces the switching and restoration times of liquid crystal molecules by quarter, enhancing the overall response time while maintaining light transmittance and applicability across various LCD modes, including TN, IPS, VA, and ECB.
Implementation Method 1
forming photosensitive patterns on the first alignment layer, and applying a mixture of liquid crystals and photo curable monomers on the first alignment layer that includes the photosensitive patterns. The method of fabricating a liquid crystal display device further comprises forming a first liquid crystal layer isolated by polymer walls and polymer layer formed by polymerizing the photo curable monomers
Data Source
AI summary
A liquid crystal display device comprises a liquid crystal layer formed between first and second substrates, the liquid crystal layer being divided into at least two layers.