Liquid Crystal Display Device Slit Electrodes Light Transmittance
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Solution Overview
Problem
Liquid crystal display devices face challenges in achieving high light transmittance and low energy consumption due to high rotary viscosity and inefficient light transmission, leading to increased power usage and reduced service time.
Innovation Solution
A liquid crystal display device with an array substrate featuring elongated slit electrodes and electrode gaps in the same layer structure, an insulating layer, and a specific liquid crystal composition that includes compounds represented by formulas I, II, and III, which optimize the alignment of liquid crystal molecules for improved light transmittance and reduced viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional liquid crystal materials are used, then the display device can operate, but the light transmittance is low and energy consumption is high
Solution Approach 1:
The patent changes the molecular structure parameters of liquid crystal compounds by introducing specific groups (fluorine atoms, cyano groups, alkoxy chains) and adjusting molecular weight and shape anisotropy to reduce rotary viscosity and improve light transmittance, thereby lowering power consumption while maintaining display performance
Solution Approach 2:
The patent uses composite liquid crystal formulations containing multiple compounds with different molecular structures (cyclic compounds, linear compounds, branched compounds) to achieve synergistic effects that improve both light transmittance and response characteristics while reducing overall power consumption
2Speed
If the rotary viscosity of liquid crystal is reduced to improve response speed, then the response time decreases, but the drive voltage requirements increase
Solution Approach 1:
The patent optimizes molecular parameters such as length anisotropy and polar moment of inertia to reduce rotary viscosity γ1, achieving faster response speeds while balancing dielectric anisotropy to maintain reasonable drive voltage levels
3Speed
If the cell thickness is reduced to improve response time, then the rise time decreases, but the fall time increases
Solution Approach 1:
The patent adjusts liquid crystal material parameters including elastic constants and viscosity to compensate for the effects of cell thickness reduction, achieving balanced rise and fall times while maintaining fast response characteristics
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 results in higher light transmittance and luminance, allowing for reduced backlight intensity and lower power consumption, thereby achieving energy and power savings while maintaining high display performance.
Implementation Method 1
liquid crystals deformed under the action of an external force (an electric field, a magnetic field) can 'rebound' back to the original shapes by intermolecular interactions
Implementation Method 2
they not only need to have the stabilities as mentioned above, but also should have properties, such as a broader nematic phase temperature range, a suitable birefringence anisotropy
Data Source
AI summary
Disclosed is a liquid crystal display device comprising an array substrate and an opposite substrate arranged facing the array substrate, and further comprises a liquid crystal composition located between said array substrate and the opposite substrate, wherein said array substrate comprises elongated and evenly spaced slit electrodes and electrode gaps between the slit electrodes, with the slit electrodes and the electrode gaps said being located in the same layer structure; said array substrate comprises a bulk electrode below the slit electrodes; and said array substrate further comprises an insulating layer between the slit electrodes and the bulk electrode. The liquid crystal display device has a higher light transmittance, such that more backlight passes through the liquid crystal display device, resulting in the liquid crystal display device having a higher luminance.