Asymmetric Protrusions in Blue Phase Liquid Crystal Displays
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Solution Overview
Problem
Blue phase liquid crystal displays require high operating voltages, which hinders efficiency and transmittance, and existing technologies struggle to reduce these voltages while maintaining or enhancing liquid crystal efficiency.
Innovation Solution
Incorporating first asymmetric protrusions in each sub-pixel to guide incident light to different directions, increasing transmittance and liquid crystal efficiency, and allowing for multi-domain display quality with excellent wide viewing angles by adjusting the inclination angles of liquid crystal molecules through structural design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If blue phase liquid crystal is used in display, then fast response time and no alignment film requirement are achieved, but high operating voltage is required
Solution Approach 1:
The patent introduces asymmetric protrusions with different inclination angles in different sub-pixel regions to create directional light guidance. This asymmetric structural design modifies the optical path and enhances light utilization efficiency, allowing the system to achieve better display performance at lower operating voltages while maintaining the fast response characteristics of blue phase liquid crystal
Solution Approach 2:
The patent applies different protrusion inclination angles in different spatial regions (first region vs second region) to optimize light guidance for specific viewing directions. This local differentiation allows targeted optimization of light transmission in different areas, improving overall transmittance and reducing the voltage required for effective liquid crystal modulation
2Use of energy by moving object
If operating voltage is reduced, then energy consumption decreases, but transmittance and liquid crystal efficiency deteriorate
Solution Approach 1:
The asymmetric protrusions are designed with specific inclination angles that optimize the refraction and guidance of incident light. This asymmetric geometry extends the effective optical path length within the liquid crystal layer, enhancing light-matter interaction and improving transmittance efficiency even at reduced operating voltages
Solution Approach 2:
The patent introduces a spatial dimension element by creating three-dimensional protrusions with varying heights and angles. This adds vertical dimensionality to the otherwise planar structure, enabling enhanced light guidance and multiple internal reflections that increase the effective optical path and improve transmittance without requiring higher voltages
3Illumination intensity
If asymmetric protrusions are added to guide light, then transmittance and viewing angle improve, but device complexity increases
Solution Approach 1:
The patent divides the substrate into distinct regions (first region and second region) with different protrusion configurations optimized for different viewing directions. This segmentation allows independent optimization of each region's light guidance characteristics while maintaining overall system functionality, achieving improved transmittance and viewing angle without excessive complexity
Solution Approach 2:
The asymmetric protrusions serve multiple functions simultaneously: they act as alignment structures for liquid crystal molecules, serve as optical elements for light guidance and refraction, and define regional zones for different viewing directions. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving multiple performance improvements
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 reduces the required operating voltage, increases transmittance, and enhances display quality with improved wide viewing angles by effectively guiding light and adjusting liquid crystal molecule orientations.
Implementation Method 1
a first asymmetric protrusion is used for guiding incident lights in each area of the sub pixel to different predetermined directions
Implementation Method 2
The blue phase liquid crystal is optically isotropic before applying a voltage and is optically anisotropic after applying a voltage
Data Source
AI summary
A liquid crystal display panel including a first substrate, a second substrate, and a liquid crystal mixture is provided. The first substrate includes a first base and a first electrode layer. The first base has a plurality of sub pixels each having at least one first asymmetric protrusion. The first electrode layer is disposed on the first asymmetric protrusion. The second substrate is assembled to the first substrate. The liquid crystal mixture is disposed between the first asymmetric protrusion and the second substrate.