Liquid Crystal Grating Slit Position Adjustment for 3D Display Crosstalk
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Solution Overview
Problem
Conventional grating-type autostereoscopic 3D display technology suffers from significant crosstalk when the observer's position moves away from the optimal viewing plane, limiting the flexibility of viewing positions and degrading the 3D display experience.
Innovation Solution
A grating controlling method and apparatus that adjusts slit positions based on the observer's current eye position, using an eye tracking module to calculate the distance from the base position and determine the necessary movement of slit positions within specific value ranges to ensure proper left-eye and right-eye image observation without crosstalk, employing a liquid crystal grating with adjustable electrodes to achieve this.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the observer moves away from the optimal viewing plane, then the viewing flexibility is improved, but crosstalk increases significantly
Solution Approach 1:
The patent implements dynamic adjustment of the grating's optical characteristics by detecting the observer's eye position and real-time modifying the grating's slit positions or transparency distribution. This dynamic adaptation allows the grating to maintain optimal light separation performance across different viewing positions, thereby reducing crosstalk while improving viewing flexibility.
Solution Approach 2:
The system incorporates eye position detection that provides feedback about the observer's current viewing position. This feedback is used to adjust the grating parameters (such as slit position or transparency) to compensate for deviations from the optimal viewing plane, thereby maintaining low crosstalk levels even when the observer moves.
2Object-affected harmful factors
If the grating slit positions are adjusted dynamically, then crosstalk is reduced, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with electro-optic or liquid crystal-based grating structures that can be controlled electronically. This substitution reduces mechanical complexity while enabling dynamic adjustment of the grating's optical properties to maintain low crosstalk.
Solution Approach 2:
The system changes the optical parameters of the grating (such as refractive index, transparency, or slit position) through electrical control rather than mechanical movement. This approach reduces device complexity by eliminating complex mechanical components while achieving the same effect of reducing crosstalk through parameter modulation.
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 reduces crosstalk and enables wide-angle 3D image display by dynamically adjusting the grating slit positions to match the observer's eye movement, maintaining a clear stereoscopic effect across a broader viewing area.
Implementation Method 1
the grating may be a liquid crystal grating; and the adjusting slit positions of the grating on the basis of the original slit position, according to the distance S may include: determining a corresponding value t
Implementation Method 2
Grating is one of the elements capable of achieving the autostereoscopic 3D displaying... the left-eye image displayed by a display panel 2 can merely be viewed by a left eye, and the right-eye image can merely be viewed by a right eye
Data Source
AI summary
The present disclosure provides a grating controlling method and apparatus, a grating, a display panel, and a 3D display device for achieving 3D displaying. The grating controlling method is applied to a grating, in which the grating cooperates with a display panel used for outputting left-eye images and right-eye images to achieve the 3D displaying. The grating controlling method may include: obtaining a current position of an eye of an observer who is observing 3D images; and adjusting slit positions of the grating according to the current position, so as to enable the left-eye images to be observed by the left-eye of the observer through the adjusted slits, while to enable the right-eye images to be observed by the right-eye of the observer through the adjusted slits.