Liquid Crystal Display with Anisotropic Dielectric Constant for Fast 3D Response
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Solution Overview
Problem
Current liquid crystal displays face challenges in achieving fast response speeds necessary for displaying three-dimensional images, as they require a large amount of image information and faster pixel operation compared to two-dimensional displays.
Innovation Solution
A liquid crystal display design featuring a liquid crystal composition with an anisotropic dielectric constant between -2.9 and -1.7, and an anisotropic refractive index of 0.120 or higher, combined with a cell gap of 2.6 micrometers or less, along with a light converting unit that includes a parallax barrier, lenticular panel, or patterned retarder to enhance response speed and maintain transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional liquid crystal composition is used, then device complexity is reduced, but response speed is insufficient for 3D image display
Solution Approach 1:
The patent employs a composite liquid crystal composition comprising multiple specific compounds (Formula 1, Formula 2, Formula 3, Formula 4, and Formula 5) in defined weight percentages. This composite approach achieves fast response speed suitable for 3D display while maintaining manageable compositional complexity through systematic material design.
Solution Approach 2:
The patent optimizes key parameters including anisotropic dielectric constant (−2.9 ≤ Δε ≤ −1.7), anisotropic refractive index (Δn ≥ 0.120), and cell gap (≤ 2.6 μm). By precisely controlling these parameters, the liquid crystal display achieves fast response speed while maintaining transmittance and image quality.
2Speed
If cell gap is reduced to improve response speed, then response speed increases, but transmittance may deteriorate
Solution Approach 1:
The patent simultaneously optimizes multiple parameters to resolve this contradiction: using liquid crystal composition with specific anisotropic dielectric constant (−2.9 ≤ Δε ≤ −1.7) and anisotropic refractive index (Δn ≥ 0.120), combined with cell gap ≤ 2.6 μm. This multi-parameter optimization enables fast response speed while maintaining adequate transmittance.
Solution Approach 2:
The composite liquid crystal composition formulated with specific compounds (Formulas 1-5) in optimized weight percentages provides both fast response characteristics and good optical properties. The synergistic combination of materials enables simultaneous achievement of reduced cell gap benefits and maintained transmittance.
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 significantly improves response speed while maintaining transmittance, enabling the display of three-dimensional images with faster on-response and off-response times, and can be used in both 2D and 3D modes.
Implementation Method 1
a liquid crystal layer disposed between the pixel electrode and the common electrode and including a liquid crystal composition having an anisotropic dielectric constant equal to or smaller than −2.9 and equal to or larger than −1.7
Implementation Method 2
The liquid crystal composition has an anisotropic refractive index equal to or larger than about 0.120
Implementation Method 3
The light converting unit includes a parallax barrier panel including a light transmission area transmitting the light and a light blocking area blocking the light
Implementation Method 4
the common electrode forms an electric field having an equipotential surface substantially parallel to an upper surface of the first base substrate in cooperation with the pixel electrode
Data Source
AI summary
A liquid crystal display includes a plurality of pixels, a first substrate, a second substrate, and a liquid crystal layer disposed between the first and second substrates. The first substrate includes a first base substrate and a pixel electrode provided on the first base substrate to correspond to each of the pixels. The second substrate includes a second base substrate facing the first base substrate and a common electrode provided on the second base substrate. The common electrode forms an electric field having an equipotential surface substantially parallel to an upper surface of the first base substrate in cooperation with the pixel electrode. The liquid crystal layer is disposed between the pixel electrode and the common electrode and includes a liquid crystal composition having an anisotropic dielectric constant equal to or smaller than −2.9 and equal to or larger than −1.7.