Blue Phase LCD with Insulating Patterns for Fast Response
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Solution Overview
Problem
Liquid crystal display (LCD) devices face issues with high driving voltage and low response speed, which affect display quality and efficiency.
Innovation Solution
The implementation of a liquid crystal display device with a blue phase or uniform standing helix mode, featuring substrates with insulating patterns and electrodes that generate a horizontal electric field, reducing the driving voltage and enhancing response speed by using blue phase or uniform standing helix liquid crystal molecules stabilized with polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional LCD modes (nematic, smectic, cholesteric) are used, then the device structure is simple, but the response speed is slow causing residual images
Solution Approach 1:
The patent changes the physical state and molecular arrangement parameters of the liquid crystal from conventional nematic/smectic/cholesteric phases to blue phase or uniform standing helix phases. This parameter change enables faster response speed while maintaining a relatively simple device structure without requiring orientation films or rubbing steps.
Solution Approach 2:
The patent uses composite liquid crystal materials comprising blue phase liquid crystal compounds or uniform standing helix liquid crystal compounds combined with chiral dopants and polymer stabilizers. This composite approach achieves high response speed while simplifying the overall device structure by eliminating traditional alignment layers.
2Speed
If blue phase or uniform standing helix mode is used, then response speed is improved, but driving voltage becomes high
Solution Approach 1:
The patent introduces insulating patterns at specific locations between the common electrode and pixel electrode to create localized electric field enhancement. This local field concentration allows the liquid crystal molecules to reorient more efficiently, reducing the overall driving voltage required while maintaining the fast response characteristics of blue phase or uniform standing helix modes.
Solution Approach 2:
The insulating patterns act as intermediary structures that mediate the electric field distribution between the common electrode and pixel electrode. These patterns concentrate and direct the electric field lines through the liquid crystal layer, enabling effective molecular reorientation at lower voltages while preserving the high response speed.
3Speed
If conventional LCD structure with orientation films is used, then manufacturing process is simple, but response speed is slow
Solution Approach 1:
The patent extracts and eliminates the orientation films and rubbing steps from the conventional LCD fabrication process by using blue phase or uniform standing helix liquid crystal modes. The self-aligning properties of these liquid crystal phases allow molecules to orient correctly without traditional alignment layers, simplifying the manufacturing process while achieving faster response speeds.
Solution Approach 2:
The blue phase or uniform standing helix liquid crystal compounds possess self-aligning properties that enable them to automatically orient in the desired direction under an electric field without requiring external orientation films or mechanical rubbing steps. This self-service capability simplifies fabrication while improving response performance.
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 configuration reduces the driving voltage required for the LCD device while improving response speed and display quality, and eliminates the need for orientation films and rubbing steps, leading to more efficient fabrication and enhanced optical properties.
Implementation Method 1
the adjacent pixel and common electrodes generating a horizontal electric field according to a driving voltage
Implementation Method 2
the liquid crystal layer including one of a blue phase liquid crystal molecules and a uniform standing helix liquid crystal molecules
Data Source
AI summary
A liquid crystal display device includes: first and second substrates facing and spaced apart from each other; a plurality of insulating patterns on an inner surface of the first substrate; a plurality of pixel electrodes and a plurality of common electrodes on the plurality of insulating patterns, the plurality of pixel electrodes alternating with the plurality of common electrodes, the adjacent pixel and common electrodes generating a horizontal electric field according to a driving voltage; and a liquid crystal layer between the first and second substrates, the liquid crystal layer including one of a blue phase liquid crystal molecules and a uniform standing helix liquid crystal molecules.