Wide Viewing Angle LCD Panel with Polymerized Anisotropic Monomers
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Solution Overview
Problem
Current liquid crystal display (LCD) panels have limited viewing angles due to optical behavior of the liquid crystal layer with respect to light beams at various tilt angles, and existing solutions like birefringence compensators increase the panel's thickness and weight without providing significant benefits.
Innovation Solution
Incorporating a predetermined proportion of anisotropic monomers into the liquid crystal layer, where the angle between the optical axes of the monomers and LC molecules is less than 10 degrees, and polymerizing these monomers to form a network that compensates for phase retardation deviations, thereby preventing light leakage and enhancing viewing angles without the need for additional compensators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a birefringence compensator is interposed between two linear polarizers to compensate phase retardation difference, then viewing angle is improved, but thickness and weight of the LCD panel increase
Solution Approach 1:
The patent combines the birefringence compensator function directly into the liquid crystal layer by mixing anisotropic monomers with the liquid crystal molecules. This integration eliminates the need for a separate compensator layer, thereby maintaining wide viewing angle performance while reducing overall panel thickness and weight.
Solution Approach 2:
The patent creates a composite liquid crystal material by mixing liquid crystal molecules with anisotropic monomers in a predetermined proportion. This composite material inherently provides both the liquid crystal's switching functionality and the birefringence compensator's phase retardation compensation, achieving wide viewing angle without additional components.
2Adaptability or versatility
If a birefringence compensator is interposed between two linear polarizers to compensate phase retardation difference, then viewing angle is improved, but thickness of the LCD panel increases
Solution Approach 1:
The patent combines the birefringence compensator function directly into the liquid crystal layer by mixing anisotropic monomers with the liquid crystal molecules. This integration eliminates the need for a separate compensator layer, thereby maintaining wide viewing angle performance while reducing overall panel thickness and weight.
Solution Approach 2:
The patent creates a composite liquid crystal material by mixing liquid crystal molecules with anisotropic monomers in a predetermined proportion. This composite material inherently provides both the liquid crystal's switching functionality and the birefringence compensator's phase retardation compensation, achieving wide viewing angle without additional components.
3Adaptability or versatility
If anisotropic monomers are mixed with liquid crystal molecules and polymerized to form a network, then phase retardation deviation is compensated and viewing angle is increased, but the complexity of the liquid crystal composition increases
Solution Approach 1:
The patent carefully controls the proportion of anisotropic monomers in the liquid crystal composition and specifies that the angle between optical axes should be less than 10 degrees. By optimizing these parameters, the patent achieves effective phase retardation compensation while maintaining manageable composition complexity and ensuring the liquid crystal remains processable.
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 approach effectively increases the viewing angle of LCD panels by compensating for phase retardation deviations, reducing the panel's thickness and weight, and eliminating the need for birefringence compensators, thereby improving performance and reducing fabrication costs.
Implementation Method 1
Light beam traveling through the LC layer 116 with a large tilt angle is usually engaged with phase retardation different from the light beam traveling normal to the LCD panel. The disclosed birefringence compensator 110 characterized with a negative phase retardation to compensate the phase retardation difference so as to increase viewing angle.
Implementation Method 2
Incorporating a predetermined proportion of anisotropic monomers into the liquid crystal layer, where the angle between the optical axes of the monomers and LC molecules is less than 10 degrees
Implementation Method 3
at least part of the monomers are polymerized to form a polymer network
Data Source
AI summary
A wide viewing angle liquid crystal display (LCD) panel comprising an upper substrate, a lower substrate, and a liquid crystal (LC) layer is provided. The upper substrate is assembled above the lower substrate. The LC layer is interposed between the two substrates. The LC layer has LC molecules mixed with a predetermined percentage of negative anisotropic monomers. The optical axes of the monomers and the LC molecules as the LCD panel in dark state forms an angle less than 10 degree.