Liquid Crystal Lens Electrode Segmentation for Stereoscopic Display
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Solution Overview
Problem
Liquid crystal lenses in stereoscopic display devices are prone to disorderly distribution of liquid crystal molecules due to the influence of peripheral electrodes, leading to a less desirable lens effect and display quality.
Innovation Solution
The electrically-driven liquid crystal lens panel features a first electrode layer with specific electrode configurations, including main and extending portions, where the extending direction of the electrodes is aligned with the alignment direction of the liquid crystal molecules, preventing the peripheral electrode from disrupting the interior liquid crystal distribution and ensuring a desired refractive index distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If peripheral electrodes are used to drive liquid crystal molecules, then the liquid crystal lens can be controlled to switch between plane and stereoscopic display modes, but the peripheral electrodes create electric fields that cause interior liquid crystal molecules to become disorderly distributed, reducing the lens effect
Solution Approach 1:
The electrode structure is segmented into multiple independent electrode units, each capable of independent voltage control. This allows selective activation of electrode regions, enabling the device to switch between plane and stereoscopic display modes while minimizing the impact of peripheral electrodes on interior liquid crystal molecule distribution through localized control.
Solution Approach 2:
Different regions of the electrode structure are designed with different characteristics - the peripheral electrodes have specific geometric configurations (such as arc-shaped or segmented structures) that optimize their driving capability while minimizing their harmful electric field effects on interior liquid crystal molecules. The electrode spacing and voltage distribution are locally optimized to achieve this balance.
2Productivity
If the electrode configuration is optimized for driving liquid crystal molecules, then the switching performance is improved, but the electric field distribution becomes complex and causes disorderly distribution of liquid crystal molecules, reducing display quality
Solution Approach 1:
The electrode configuration is designed to be dynamically controllable, with voltage applied selectively to different electrode regions based on the required display mode. This dynamic control allows the system to achieve fast switching responses while maintaining reliable lens effects by adjusting the electric field distribution in real-time to prevent disorderly liquid crystal molecule distribution.
Solution Approach 2:
The electrode structure incorporates variable geometric parameters (such as electrode spacing, curvature radius, and segmentation patterns) that can be optimized to change the electric field distribution characteristics. By adjusting these parameters, the system achieves both fast switching performance and reliable lens effects, preventing the harmful effects of complex electric field distributions on liquid crystal molecule alignment.
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 enhances the lens effect of the liquid crystal lens panel and improves the display quality of the stereoscopic display panel by maintaining a regular liquid crystal distribution, preventing disorderly distribution and achieving a preferable refractive index variation.
Implementation Method 1
liquid crystal molecules in a liquid crystal layer are driven by the electric field distributed in the liquid crystal layer, direction of the long axis of the liquid crystal molecules are changed along with strength undulation of the electric field
Implementation Method 2
the liquid crystal molecules provide a refractive index distribution similar to that of a lens
Implementation Method 3
The first alignment layer is disposed between the first substrate and the liquid crystal layer, and the first alignment layer has a first alignment direction to align liquid crystal molecules of the liquid crystal layer
Data Source
AI summary
An electrically-driven liquid crystal lens panel includes a pair of substrates, a liquid crystal layer, alignment layers, and electrode layers. The electrode layer is disposed between the alignment layer and the substrate, has effective and non-effective regions, and includes electrodes. Each electrode has main and extending portions and a turning point, wherein the turning points are disposed at sites at which the main portions and the extending portions connect, the main portions extends along a first extending direction, and each extending portion extends along a second extending direction different from the first extending direction. The second extending direction is substantially parallel to an alignment direction of the alignment layer. A connecting line formed by connecting the turning points is a boundary between the effective region and the non-effective region, wherein the main portions are disposed in the effective region, and the extending portions are disposed in the non-effective region.