Blue-Phase Liquid Crystal Electrode Structure for Lower Driving Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies require higher driving voltage for blue-phase liquid crystal and face manufacturing difficulties with complex wall-like electrodes.
Innovation Solution
A display substrate with a closed ring-shaped first electrode and a taller, pillar-shaped second electrode, arranged within the ring, generates a stronger and more uniform transverse electric field, reducing the need for high driving voltage and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wall-like electrodes with complex shapes are used to generate uniform horizontal electric field, then driving voltage is decreased, but manufacturing difficulty increases and process feasibility deteriorates
Solution Approach 1:
The electrode structure is segmented into multiple parts: a first electrode with first height and a second electrode with second height (greater than first height). This segmentation allows different regions to serve different functions - the taller second electrode generates the uniform horizontal electric field while the shorter first electrode provides complementary field distribution, achieving the desired electric field pattern with simpler manufacturing than a single complex wall-like structure
Solution Approach 2:
Different portions of the electrode structure are given different local qualities through varying heights. The second electrode has greater height to generate stronger electric field in specific regions, while the first electrode has smaller height for other regions. This local differentiation achieves uniform horizontal electric field distribution without requiring complex overall geometry, simplifying manufacturing
2Ease of manufacture
If normal transverse electric field with bar-shaped electrodes is used, then ease of manufacture is improved, but driving voltage increases
Solution Approach 1:
The electrode structure transitions from two-dimensional bar-shaped electrodes to three-dimensional electrodes with different heights. By introducing the height dimension and creating electrodes with varying heights (first height and second height), the patent generates a more intense and uniform horizontal electric field throughout the liquid crystal cell, thereby reducing the driving voltage requirement while maintaining manufacturing simplicity
3Use of energy by moving object
If wall-like electrodes with wrinkles are used to enhance electric field intensity, then driving voltage is decreased, but device complexity increases
Solution Approach 1:
Instead of using static wrinkles on electrode surfaces, the patent employs a dynamic height differentiation between electrodes. The second electrode is designed with greater height than the first electrode, creating a three-dimensional configuration that dynamically adjusts electric field distribution. This approach achieves enhanced electric field intensity and reduced driving voltage without the manufacturing complexity of surface wrinkles
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 achieves lower driving voltage requirements and improves display quality while simplifying the fabrication process and reducing costs.
Implementation Method 1
capable of implementing display by directly using electric-field-induced birefringence principle (i.e., Kerr effect) without using a alignment layer
Implementation Method 2
different electrical fields are applied at different locations of the substrates so that the liquid crystal molecules are rotated differently so as to control light from backlight to deflect in different manners
Data Source
AI summary
The invention provides a display substrate and a display device, and can solve the problems that, in the existing display technology, the driving voltage required for driving the blue-phase liquid crystal is higher, and there is large difficulty for manufacturing the wall-like electrodes and poor feasibility of process if the wall-like electrodes are used for driving. A display substrate of the invention comprises a base, and a first electrode and a second electrode arranged on the base, the first electrode having a closed ring shape, the second electrode being arranged in the ring shape of the first electrode, and a height of the second electrode being larger than that of the first electrode. A display device of the invention comprises the above display substrate, a first substrate opposite to the display substrate, and a blue-phase liquid crystal layer between the first substrate and the display substrate.