Dynamic Grating 3D Display Viewpoint Tracking
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Solution Overview
Problem
Naked-eye 3D display devices with fixed view focus points limit the viewer's ability to maintain a good 3D display effect when the viewpoint changes, as the number of view focus points is limited and their positions are fixed.
Innovation Solution
A method and device that collect real-time face image information of the viewer, calculate target grating structure status at a second frame rate, and adjust the grating structure at a third frame rate to match the viewer's current viewpoint, ensuring a consistent 3D display effect by dynamically adjusting the grating structure's light transmission and opaque states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fixed view focus points are provided in the parallax grating, then the 3D picture effect is improved at specific viewpoints, but the viewer cannot see good 3D display effect when the viewpoint changes because the quantity and positions of view focus points are limited and fixed
Solution Approach 1:
The patent applies the dynamics principle by making the grating structure adjustable and movable. Specifically, the grating units can be dynamically repositioned along the display panel surface, and the grating structure can be tilted or rotated, allowing the view focus points to move and change positions in real-time according to viewer location, thereby resolving the contradiction between fixed focus points and viewpoint adaptability
Solution Approach 2:
The patent applies parameter changes by modifying the physical parameters of the grating structure, including the position of grating units, the tilt angle of the grating structure, and the spacing between gratings. These parameters can be adjusted dynamically to recreate view focus points at different locations, enabling the system to adapt to various viewpoints while maintaining high-quality 3D display effects
2Speed
If real-time face image information is collected and grating structure is adjusted at high frame rate, then the response to viewpoint changes is improved, but the resource consumption and computational load increase
Solution Approach 1:
The patent applies partial action by selectively adjusting only the necessary grating units rather than the entire grating structure. When a viewer's viewpoint changes, only the specific grating units that need to be repositioned are adjusted, while other units remain in place. This reduces computational load and energy consumption while maintaining fast response speed for viewpoint tracking
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing optimal grating configurations for different viewpoints. When a viewer's face is detected, the system can quickly retrieve and apply the pre-computed configuration rather than calculating from scratch, reducing real-time computational requirements while maintaining fast response
Data Source
AI summary
The present disclosure provides a 3D display device, a method for controlling the same and a computing device. The method includes: collecting in real time current face image information of a viewer; based on the face image information, calculating at a second frame rate, target status information of the grating structure which enables the viewer to see a 3D image at a current viewpoint; adjusting a status of the grating structure at a third frame rate according to the target status information of the grating structure. The third frame rate is greater than the second frame rate.