3D Display Crosstalk Mitigation via Head Rotation Compensation
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Solution Overview
Problem
Conventional auto-stereoscopic 3D displays experience reduced effectiveness in mitigating 3D crosstalk when users rotate their heads, as the midpoint position reference becomes imprecise, leading to incorrect projection of images and reduced viewing experience.
Innovation Solution
A method that detects the first and second eye positions of a user, determines the viewing and rotation angles, estimates and corrects the midpoint position, and uses the corrected midpoint to accurately determine which pixels project light to each eye, thereby improving the accuracy of image projection and reducing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the midpoint position between eyes is used as a reference point to determine pixel projection, then the 3D display can function with a simple eye tracking system, but the accuracy of image projection deteriorates when the user rotates their head
Solution Approach 1:
The patent segments the head rotation problem into two independent components: the original midpoint position calculation and the additional rotation angle compensation. By detecting eye positions to calculate the midpoint and separately detecting head rotation to calculate compensation values, the system maintains operational simplicity while improving accuracy through modular problem decomposition.
Solution Approach 2:
The patent introduces a rotation angle detection mechanism as an intermediary element that mediates between the simple midpoint position calculation and the accurate image projection requirement. This intermediary provides the necessary compensation data without fundamentally changing the core eye tracking system, thus maintaining ease of operation while improving precision.
2Object-affected harmful factors
If 3D weavers are used to attenuate pixels to reduce crosstalk, then the overall 3D crosstalk situation is improved, but the system complexity increases
Solution Approach 1:
Instead of using static 3D weavers that physically attenuate light paths, the patent implements a dynamic software-based solution that adjusts pixel assignment in real-time based on detected eye positions and head rotation angles. This dynamic approach achieves crosstalk reduction without the physical complexity of 3D weaver structures.
Solution Approach 2:
The patent replaces the mechanical/optical 3D weaver system with an electronic control system that uses eye tracking and rotation detection data to dynamically determine pixel projection. This substitution eliminates the need for physical attenuating structures while achieving the same crosstalk reduction effect through intelligent pixel assignment.
3Measurement precision
If the midpoint position is corrected based on rotation angle and reference position difference, then the image projection accuracy is improved, but the calculation complexity increases
Solution Approach 1:
The patent performs preliminary calculations by pre-determining the relationship between head rotation angles and midpoint position corrections. By calculating rotation angles and compensation values in advance based on detected eye positions, the system prepares correction data before image projection is needed, reducing real-time computational complexity while maintaining high accuracy.
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 method effectively mitigates 3D crosstalk by ensuring accurate light projection to the correct eyes even when the user rotates their head, enhancing the overall 3D viewing experience by correcting the midpoint position based on rotation and viewing angles.
Implementation Method 1
project the images for the left eye and the right eye respectively to the correct eyes through a liquid crystal control light path in a 3D lens element. Since the images need to be focused on the left and right eyes, the 3D lens element generally has an arc design
Data Source
AI summary
The disclosure provides a method for mitigating 3D crosstalk and a 3D display. The method includes: detecting first and second eye positions of a user, and determining a viewing angle of the user and a rotation angle of a head of the user accordingly; estimating a first reference position and a first midpoint position between first and second eyes of the user based on the first and second eye positions of the user; obtaining a second reference position, and estimating a difference between the first and second reference positions; correcting the first midpoint position to a second midpoint position based on the rotation angle of the user and the difference; and determining a first pixel for projecting to the first eye and a second pixel for projecting to the second eye among the pixels of the 3D display based on the second midpoint position.