Blue Phase Liquid Crystal Display Module with Oblique Electric Field
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Solution Overview
Problem
Conventional blue phase liquid crystal display technology faces issues with high driving voltage and inability to achieve a bright state when using a vertical electric field due to the limitations of the In-Plane Switching (IPS) driving method and the requirement for complex synthesis processes to improve blue phase liquid crystal material performance.
Innovation Solution
A blue phase liquid crystal display module is designed with a hollow concave-convex pixel electrode structure on the lower substrate, featuring alternating projections and depressions to generate oblique electric fields, reducing driving voltage and enabling a bright state by allowing blue phase liquid crystal molecules to fill the pixel electrode and create optical anisotropy, while also using staggered lower and upper common electrodes and an auxiliary spacer to manage cell thickness and voltage distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the In-Plane Switching (IPS) driving method is used, then the blue phase liquid crystal display can be operated, but the penetration depth generated by the lateral electric field is limited and a higher driving voltage is required
Solution Approach 1:
The patent transitions from a two-dimensional lateral electric field (IPS method) to a three-dimensional oblique electric field by introducing a tilted electrode structure. The pixel electrode is inclined at an angle θ (30°-60°) relative to the substrate plane, creating an electric field that penetrates deeper into the liquid crystal layer along the tilt direction, thereby improving field penetration depth and reducing driving voltage requirements
2Strength
If a vertical electric field is applied, then the blue phase liquid crystal is stretched vertically, but the phase of polarized light does not change and a bright state cannot be obtained
Solution Approach 1:
The patent introduces asymmetry in the electrode configuration by tilting the pixel electrode at an angle θ relative to the substrate. This asymmetric structure generates an oblique electric field that simultaneously stretches the liquid crystal molecules and induces optical anisotropy, allowing both vertical alignment and light modulation functionality to coexist
Solution Approach 2:
Instead of applying a purely vertical electric field that fails to produce optical changes, the patent inverts the approach by using an oblique electric field generated through tilted electrodes. This inverted field direction achieves both liquid crystal stretching and phase modulation, solving the contradiction between mechanical alignment and optical functionality
3Use of energy by moving object
If the blue phase liquid crystal material performance is improved by manufacturing with a big Kerr constant, then the driving voltage can be reduced, but the synthesis process becomes complex and costly
Solution Approach 1:
The patent changes the geometric parameter of the electrode structure (tilt angle θ) to optimize the electric field distribution and enhance the Kerr effect efficiency. By adjusting the tilt angle within 30°-60°, the system achieves better voltage control without requiring complex material synthesis, thus reducing both driving voltage and manufacturing complexity
Solution Approach 2:
The patent substitutes material property optimization (chemical approach) with structural parameter optimization (geometric approach). Instead of synthesizing complex blue phase liquid crystal materials with high Kerr constants, the invention uses a tilted electrode structure to achieve similar performance benefits through geometric configuration, thereby avoiding complex synthesis processes
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
The solution effectively decreases the driving voltage required for the blue phase liquid crystal display module and allows for a bright state in a vertical electric field, simplifying manufacturing and reducing costs by eliminating the need for complex material synthesis and optimizing electrode structure.
Implementation Method 1
multiple oblique electric fields are generated among the pixel electrode, the upper common electrodes and the lower common electrodes in order to drive the blue phase liquid crystal molecules
Implementation Method 2
allowing blue phase liquid crystal molecules to fill the pixel electrode and create optical anisotropy
Data Source
AI summary
A blue phase liquid crystal display module and device, and a method for manufacturing the same are disclosed. The module includes an upper substrate, a lower substrate disposed oppositely, multiple blue phase liquid crystal molecules disposed between the upper substrate and the lower substrate, multiple upper common electrodes disposed in parallel and spaced at intervals on the upper substrate, multiple lower common electrodes disposed in parallel and spaced at intervals on the lower substrate, wherein the lower common electrodes are staggered with the upper common electrodes, and a pixel electrode disposed on the lower substrate, wherein, the pixel electrode is a hollow concave-convex structure, the pixel electrode has alternating projections and depressions such that multiple oblique electric fields are generated among the pixel electrode, the upper common electrodes and the lower common electrodes in order to drive the blue phase liquid crystal molecules.