Optical Filter With Liquid Crystal Layer For 3D Display
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Solution Overview
Problem
Crosstalk phenomenon in stereoscopic image display devices reduces the viewing angle of 3D images without ensuring the brightness of the image, making it difficult to achieve a wide viewing angle without compromising image quality.
Innovation Solution
An optical filter with a liquid crystal layer containing polymerizable liquid crystal compounds, which includes first and second regions with different phase retardation characteristics, and a light transmission control region to control polarized states of light, ensuring that light is divided into two kinds with different polarized states and emitted effectively, thereby reducing crosstalk and maintaining image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If methods are used to prevent crosstalk phenomenon, then crosstalk is reduced, but viewing angle is reduced
Solution Approach 1:
The patent applies local quality by creating different regions within the liquid crystal layer with distinct phase retardation characteristics. The liquid crystal layer is divided into multiple regions where each region has specific phase retardation properties tailored to control light polarization in different viewing directions, thereby preventing crosstalk while maintaining wide viewing angle.
Solution Approach 2:
The patent utilizes parameter changes by varying the phase retardation characteristics across different regions of the liquid crystal layer. By controlling the orientation and distribution of liquid crystal molecules in different regions, the patent achieves different phase retardation values that enable simultaneous crosstalk prevention and wide viewing angle maintenance.
2Object-affected harmful factors
If methods are used to prevent crosstalk phenomenon, then crosstalk is reduced, but brightness of 3D image is lost
Solution Approach 1:
The patent applies local quality by creating different regions within the liquid crystal layer with distinct phase retardation characteristics. The liquid crystal layer is divided into multiple regions where each region has specific phase retardation properties tailored to control light polarization in different viewing directions, thereby preventing crosstalk while maintaining wide viewing angle.
Solution Approach 2:
The patent utilizes parameter changes by varying the phase retardation characteristics across different regions of the liquid crystal layer. By controlling the orientation and distribution of liquid crystal molecules in different regions, the patent achieves different phase retardation values that enable simultaneous crosstalk prevention and wide viewing angle maintenance.
3Manufacturing precision
If polymerizable liquid crystal compounds are used, then phase retardation characteristics are controlled, but manufacturing complexity increases
Solution Approach 1:
The patent merges the liquid crystal compound with polymerizable functional groups directly into a single material system. This integration allows the liquid crystal layer to be formed through a single polymerization process, combining the liquid crystal alignment function and phase retardation control in one step, thereby reducing manufacturing complexity while maintaining precise phase retardation characteristics.
Solution Approach 2:
The polymerizable liquid crystal compound serves multiple functions: it provides liquid crystal alignment, controls phase retardation characteristics, and forms the structural matrix of the liquid crystal layer. This multi-functionality reduces the need for separate materials and processing steps, simplifying manufacturing while achieving precise optical control.
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 optical filter effectively controls phase retardation characteristics and adhesive properties, ensuring a stable wide viewing angle for 3D images without loss of brightness by using multifunctional and monofunctional polymerizable liquid crystal compounds, which are aligned to optimize refractive index differences and thickness for phase retardation, allowing for efficient light division and emission.
Implementation Method 1
The liquid crystal layer may include first and second regions having different phase retardation characteristics
Implementation Method 2
light incident to the optical filter may be divided into at least two kinds of light having different polarized states
Implementation Method 3
the liquid crystal layer may include a polymerizable liquid crystal compound in a polymerized form
Data Source
AI summary
Provided is an optical filter and a display device. The illustrative optical filter may be applied to a stereoscopic image display device so that the stereoscopic image display device can display a 3D image at a wide viewing angle without loss of brightness.