Liquid Crystal Grating with Dual Driving Circuitry for Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal grating-based 3D display devices suffer from significant crosstalk when viewers are not at the optimum viewing position, leading to a degraded 3D display effect due to the fixed arrangement of strip-like electrodes.
Innovation Solution
A liquid crystal grating with a dual driving circuitry system that adjusts the number of strip-like electrodes based on the viewer's distance, using a first primary driving circuitry for optimal viewing positions and a second primary driving circuitry for positions causing crosstalk, to dynamically adjust light-shielding and light-transmitting sections and compensate for crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed arrangement of strip-like electrodes is used in the liquid crystal grating, then the device structure is simple and easy to manufacture, but the 3D display effect is degraded when viewers are not at the optimum viewing position due to significant crosstalk
Solution Approach 1:
The patent applies the dynamics principle by making the liquid crystal grating's electrode arrangement adjustable rather than fixed. The grating can dynamically change its period and electrode configuration based on the viewer's position, allowing the system to adapt to different viewing distances and angles. This resolves the contradiction by enabling the grating to maintain optimal 3D display performance across multiple positions while retaining a relatively simple base structure that is easy to manufacture.
Solution Approach 2:
The patent employs parameter changes by modifying the physical parameters of the liquid crystal grating, specifically the period and electrode arrangement. By changing these parameters in response to viewer position, the system optimizes the diffraction pattern and minimizes crosstalk. This allows the same physical structure to deliver reliable 3D display effects whether the viewer is at the optimum position or at other positions, resolving the contradiction between manufacturing simplicity and display reliability.
2Reliability
If the liquid crystal grating is designed for an optimum viewing position, then low crosstalk is achieved at that position, but the 3D display effect is adversely affected when the viewer moves front or back relative to the screen
Solution Approach 1:
The patent makes the liquid crystal grating dynamic by enabling it to adjust its electrode configuration and period based on detected viewer position. This dynamic adaptation allows the grating to maintain low crosstalk and optimal 3D display effects whether the viewer is at the original optimum position or has moved front or back. The system transitions from a static design optimized for one position to a dynamic design that maintains performance across multiple positions, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent implements feedback by using a position detection mechanism to monitor viewer location and using this information to adjust the liquid crystal grating's parameters accordingly. The system continuously senses viewer position and modifies the electrode arrangement to compensate for position changes, ensuring consistent 3D display quality. This feedback loop resolves the contradiction by making the system adaptable to different viewing positions while maintaining reliable display effects.
3Reliability
If multiple driving circuitries are added to adjust the number of strip-like electrodes based on viewing position, then crosstalk is minimized across various positions, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the liquid crystal grating with electrodes that can serve multiple functions. The same electrode structure is used for both the standard display function at the optimum viewing position and the adaptive function at other positions. By making the electrodes multi-functional through programmable control, the system achieves reliable 3D display effects across different positions without proportionally increasing physical complexity, as the additional capability is achieved through control logic rather than purely physical additions.
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 solution ensures a consistent and improved 3D display effect by minimizing crosstalk across various viewing positions, allowing viewers to maintain a good 3D image experience regardless of their location relative to the display.
Implementation Method 1
a liquid crystal layer arranged between the first substrate and the second substrate
Implementation Method 2
a first primary driving circuitry configured to drive the plurality of strip-like electrodes, to form a light-shielding section and a light-transmitting section
Implementation Method 3
grating-type glasses-free 3D technology has become an important trend
Data Source
AI summary
A liquid crystal grating, a driving method thereof and a 3D display device are provided. The liquid crystal grating includes: a plurality of periodical grating units, wherein each of the periodical grating units includes a plurality of strip-like electrodes; a first primary driving circuitry configured to drive the plurality of strip-like electrodes, to form a light-shielding section and a light-transmitting section in each of the periodical grating units; at least one second primary driving circuitry configured to drive the plurality of strip-like electrodes, to form the light-shielding section and the light-transmitting section in each of the periodical grating units; and a control circuitry configured to select the first primary driving circuitry or the second primary driving circuitry to drive the strip-like electrodes in accordance with a distance between a user and the liquid crystal grating.