Liquid Crystal Device Frame Region Alignment Control
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Solution Overview
Problem
Existing OCB-mode liquid crystal devices face challenges in suppressing the reverse transition of liquid crystal molecules from the bend alignment state to the splay alignment state, especially without disposing pixel electrodes and TFT elements in non-display portions, which complicates the structure and increases manufacturing costs.
Innovation Solution
A conductive alignment regulating member is disposed in the frame region of the liquid crystal device, applying an electric potential equal to or greater than the bend transition voltage to maintain the bend alignment state, thereby preventing reverse transition and simplifying the device structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel electrodes and TFT elements are disposed in the non-display portion to suppress reverse transition, then the suppression effect is improved, but the device structure becomes more complex and manufacturing cost increases
Solution Approach 1:
The invention extracts the reverse transition suppression function from the complex pixel electrode and TFT element system, and implements it through a simplified conductive member disposed in the frame region. This conductive member is electrically connected to the common electrode, allowing it to independently control the electric field in the frame region without requiring additional pixel electrodes or TFT elements in the non-display portion.
Solution Approach 2:
The common electrode serves multiple functions: it acts as both the common electrode for the liquid crystal layer and provides electrical connection to the conductive member in the frame region. This multi-functionality eliminates the need for separate control circuits and reduces overall device complexity while maintaining effective reverse transition suppression.
2Reliability
If pixel electrodes and TFT elements are disposed in the non-display portion to suppress reverse transition, then the suppression effect is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts the reverse transition suppression function from the complex pixel electrode and TFT element system, and implements it through a simplified conductive member disposed in the frame region. This conductive member is electrically connected to the common electrode, allowing it to independently control the electric field in the frame region without requiring additional pixel electrodes or TFT elements in the non-display portion.
Solution Approach 2:
The common electrode serves multiple functions: it acts as both the common electrode for the liquid crystal layer and provides electrical connection to the conductive member in the frame region. This multi-functionality eliminates the need for separate control circuits and reduces overall device complexity while maintaining effective reverse transition suppression.
3Device complexity
If a conductive alignment regulating member is disposed in the frame region, then device structure is simplified and manufacturing cost is reduced, but the ability to suppress reverse transition may be insufficient
Solution Approach 1:
The invention applies local quality by creating a distinct electric field condition specifically in the frame region through the conductive member. By controlling the electric potential in this specific local area, the liquid crystal molecules in the frame region are maintained in the bent state, preventing reverse transition at the critical boundary areas without affecting the overall device structure.
Solution Approach 2:
The invention changes the electric field parameter in the frame region by introducing a conductive member with specific electrical connection to the common electrode. This parameter change creates a controlled electric potential distribution that maintains liquid crystal molecules in the bent state, effectively suppressing reverse transition through electrical parameter control rather than structural complexity.
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 suppresses the reverse transition of liquid crystal molecules, ensuring high-quality image display without the need for additional complex structures or increased manufacturing costs, by using a conductive alignment regulating member to maintain the bend alignment state within the frame region.
Implementation Method 1
the conductive alignment regulating member is at an electric potential for allowing the liquid crystal layer of the frame region to be in the bend alignment state
Implementation Method 2
the alignment state of the liquid crystal molecules is in the bend alignment state when a predetermined voltage is applied between the pair of substrates during driving of the liquid crystal device
Data Source
AI summary
A liquid crystal device is provided that includes a pair of substrates having a liquid crystal layer disposed therebetween, the liquid crystal layer containing therein liquid crystal molecules of which the alignment state during no-voltage application corresponds to a splay alignment state; and a conductive alignment regulating member which is at least partially disposed in a frame region defining the perimeter of a pixel region on one substrate of the pair of substrates.