Blue Phase Liquid Crystal Display with Segmented Electrodes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional blue phase liquid crystal display devices require high driving voltages to achieve the necessary horizontal electric field strength, leading to increased production costs and complexity, as well as unsymmetrical viewing angles.
Innovation Solution
The implementation of a blue phase liquid crystal display device with alternately disposed positive and negative pixel electrodes and common electrodes on opposite substrates, where the positive pixel electrodes are applied a voltage larger than the common electrodes, and the negative pixel electrodes are applied a voltage smaller than the common electrodes, allowing for a more uniform electric field distribution and reduced driving voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional IPS mode is used with only horizontal electric field generation, then the device structure is simple, but a relatively high driving voltage is needed to obtain the required horizontal electric field strength
Solution Approach 1:
The pixel electrodes are divided into positive pixel electrodes and negative pixel electrodes that are alternately disposed, allowing independent voltage control for each polarity group. This segmentation enables the generation of both horizontal and vertical electric field components through coordinated voltage application, reducing the overall driving voltage requirement while maintaining structural simplicity
Solution Approach 2:
The invention transitions from generating only horizontal electric fields to generating both horizontal and vertical electric field components by applying different voltages to positive and negative pixel electrodes relative to common electrodes. This dimensional enhancement in electric field generation reduces the magnitude of driving voltage needed to achieve the required field strength
2Device complexity
If a conventional IPS mode with dual-domain liquid crystal distribution is used, then the device structure is simple, but unsymmetrical viewing angles result
Solution Approach 1:
The invention uses alternately disposed positive and negative pixel electrodes with different voltage applications to create a more symmetrical electric field distribution. This symmetrical field configuration induces multi-domain liquid crystal distribution that provides symmetrical viewing angles from different directions, improving viewing angle properties while keeping the device structure relatively simple
3Force
If high driving voltage is applied to generate sufficient horizontal electric field strength, then the required electric field strength is achieved, but production costs and complexity increase
Solution Approach 1:
By segmenting the pixel electrodes into positive and negative groups with independent voltage control, the invention generates both horizontal and vertical electric field components. This segmented approach achieves the required total electric field strength with lower driving voltages, thereby reducing production complexity and costs while maintaining the necessary electric field strength for liquid crystal switching
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 decreases the driving voltage requirements, simplifies the manufacturing process, and enhances the viewing angle properties by achieving a multi-domain liquid crystal distribution with symmetrical viewing angles, while maintaining excellent display performance.
Implementation Method 1
image display directly based on the electric birefringence principle without an alignment layer and a rubbing treatment
Data Source
AI summary
An embodiment of the disclosed technology provides a blue phase liquid crystal display device, comprising: a lower polarizer; a thin film transistor substrate, formed above the lower polarizer; a color filter substrate, disposed above and opposite to the thin film transistor substrate; an upper polarizer, formed above the color filter substrate; a plurality of pixel electrodes, disposed on a surface of the thin film transistor substrate facing the color filter substrate and protruded toward the color filter substrate, wherein negative pixel electrodes and positive pixel electrodes are alternately disposed; a plurality of common electrodes, disposed on the color filter substrate; and a blue phase liquid crystal layer, provided between the thin film transistor substrate and the color filter substrate.