Liquid Crystal Grating for Stereoscopic Display
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Solution Overview
Problem
Existing stereoscopic display technologies face challenges in accurately displaying three-dimensional depth information due to the adverse impact of transverse electric fields on liquid crystal molecule rotation, leading to issues with antiphase domains.
Innovation Solution
A liquid crystal grating and stereoscopic display device are designed with multiple grating units on a substrate, where first and second electrodes with different voltages are arranged to distribute transverse electric fields across both substrates, reducing the intensity of the electric field on a single substrate and alleviating antiphase domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transverse electric fields are concentrated on a single substrate, then the device structure is simple, but the intensity of transverse electric field on single substrate increases causing adverse impact on liquid crystal molecule rotation and antiphase domains
Solution Approach 1:
The patent divides the single substrate into two separate substrates (first substrate and second substrate) and distributes the transverse electric fields across both of them. Each substrate holds a portion of the electrodes that generate the electric fields, thereby segmenting the field distribution and reducing the intensity on any single substrate.
Solution Approach 2:
The patent transitions from a single-substrate configuration to a dual-substrate configuration, adding a spatial dimension to the field distribution. By arranging electrodes on both the first and second substrates, the system utilizes an additional spatial dimension to disperse the electric field intensity.
2Object-affected harmful factors
If transverse electric fields are distributed on first and second substrates, then the intensity of transverse electric field on single substrate is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the electrode structure into first electrodes on the first substrate and second electrodes on the second substrate. This segmentation allows the transverse electric fields to be distributed across two substrates rather than concentrated on one, reducing the field intensity on each individual substrate.
Solution Approach 2:
The patent combines the first substrate with first electrodes and the second substrate with second electrodes to form an integrated dual-substrate system. By merging these components, the system achieves distributed electric field configuration while maintaining a unified device structure that functions as a single liquid crystal grating system.
3Object-affected harmful factors
If multiple first electrodes and multiple second electrodes are arranged with different voltages, then transverse electric fields are distributed on both substrates, but the device complexity increases
Solution Approach 1:
The patent segments the electrode system into multiple first electrodes on the first substrate and multiple second electrodes on the second substrate. Each set of electrodes can be independently controlled with different voltages, allowing the transverse electric fields to be distributed and controlled across both substrates, thereby reducing the adverse impact on liquid crystal molecule rotation.
Solution Approach 2:
The patent applies different voltages to different electrodes (first electrodes and second electrodes) to create localized electric field variations. This local quality control allows precise manipulation of the transverse electric field distribution, enabling optimization of liquid crystal molecule rotation while maintaining overall device functionality.
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 effectively reduces the adverse impact of transverse electric fields on liquid crystal molecule rotation, thereby improving the display effect of three-dimensional images by minimizing antiphase domains.
Implementation Method 1
the liquid crystal layer is located between the first substrate and the second substrate. Multiple first electrodes are located between the first substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction. Multiple second electrodes are located between the second substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction. At least two first electrodes have different voltages, and at least two second electrodes have different voltages.
Implementation Method 2
the stereoscopic display device forms a left-eye image and a right-eye image through the diffraction function of a liquid crystal grating after a spatial light modulator (SLM) performs phase modulation and amplitude modulation on optical signals
Data Source
AI summary
Provided are a liquid crystal grating and a stereoscopic display device. A liquid crystal grating includes a first substrate, a second substrate and a liquid crystal layer, where the liquid crystal layer is located between the first substrate and the second substrate. The liquid crystal grating includes multiple grating units which are arranged along a first direction, where a grating unit includes multiple first electrodes and multiple second electrodes; the multiple first electrodes are located between the first substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction; the multiple second electrodes are located between the second substrate and the liquid crystal layer and are disposed at intervals from each other along the first direction. At least two first electrodes have different voltages, and at least two second electrodes have different voltages.