Stacked Protruding Electrodes for Blue-Phase LCD Voltage Reduction
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Solution Overview
Problem
Blue-phase liquid crystal displays face challenges with high operating voltages, which hinder mass production and practical application due to their narrow temperature range and high voltage requirements.
Innovation Solution
The design of an LCD panel with stacked protruding electrodes, including specific configurations of bottom and top electrodes with insulation pattern layers, generates a fringe field effect that reduces the operating voltage and improves transmission rates by optimizing the electrode structures and switch elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If blue-phase liquid crystal is used to achieve fast response speed, then response time is improved, but operating voltage becomes excessively high (up to 55 V)
Solution Approach 1:
The patent transitions from conventional planar electrode arrangements to a three-dimensional stacked electrode structure with protruding electrodes. The first and second electrode structures are stacked vertically with insulation pattern layers between them, creating a multi-dimensional electric field distribution that reduces the operating voltage while maintaining fast response speed through optimized fringe field effects.
Solution Approach 2:
The patent employs different electrode width configurations where the bottom electrode width is greater than the top electrode width in each stacked structure. This creates localized fringe fields at the interfaces between electrodes of opposite polarity, optimizing the electric field distribution in specific regions to reduce the overall operating voltage while maintaining the fast response characteristic of blue-phase liquid crystals.
2Speed
If blue-phase liquid crystal is used to achieve fast response speed, then response time is improved, but temperature range becomes narrow (less than 2° C.)
Solution Approach 1:
The patent incorporates polymer meshed structures within the blue-phase liquid crystal composition. This composite approach combines the fast response characteristics of blue-phase liquid crystals with the thermal stability of polymers, thereby expanding the operating temperature range while maintaining the rapid response speed. The polymer network provides structural stability that allows the blue-phase to exist at wider temperature ranges.
3Device complexity
If conventional electrode structures are used, then device simplicity is maintained, but operating voltage remains high
Solution Approach 1:
The patent divides the electrode system into multiple segmented structures: first electrode structures and second electrode structures stacked vertically, with insulation pattern layers separating them. Each electrode structure consists of bottom and top electrodes with different widths. This segmentation creates multiple fringe field regions that collectively reduce the operating voltage while the structured arrangement maintains manufacturability through systematic design.
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 effectively lowers the operating voltage and enhances the transmission rate of blue-phase LCD panels, making them more viable for practical applications by addressing the high voltage issues and expanding the temperature range of blue-phase liquid crystals.
Implementation Method 1
The design of an LCD panel with stacked protruding electrodes, including specific configurations of bottom and top electrodes with insulation pattern layers, generates a fringe field effect that reduces the operating voltage
Implementation Method 2
The blue-phase liquid crystal layer has a plurality of blue-phase liquid crystal molecules that are rotated according to the electric field
Data Source
AI summary
The electrode structures in the display units of the liquid crystal display (LCD) panel described in the embodiments of the invention are formed by stacking the bottom electrodes, the insulation pattern layers, and the top electrodes. The width of each of the bottom electrodes is greater than the width of each of the top electrodes (i.e., the electrode structures have the protrusion-like shape). Therefore, the operating voltage can be effectively reduced, and the transmission rate can be improved.