Optical Fiber Scanner Array for Glasses-Free 3D Projection
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Solution Overview
Problem
Current 3D stereoscopic display technologies, including glasses-free methods, face limitations in resolution, viewing angle, and image quality, hindering their widespread adoption and user comfort due to constraints such as low imaging luminance and deficiencies in image depth and viewing angle.
Innovation Solution
A projection device utilizing an optical fiber scanner array, a light source, and an adjustment and control module that projects pencil beams to virtual object points in space, forming bundles of emitting light beams, allowing for high-speed scanning that exploits human persistence of vision to create a glasses-free 3D display by determining spatial position and scanning information for each virtual object point based on a mapping relation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If barrier 3D technology is used, then glasses-free display is achieved, but imaging luminance is low
Solution Approach 1:
The invention segments the display system into multiple optical fiber scanning units arranged in arrays, with each unit independently projecting light to specific spatial locations. This segmentation enables precise control of light delivery to virtual object points, significantly improving imaging luminance while maintaining glasses-free operation through coordinated scanning of multiple units
Solution Approach 2:
The invention replaces traditional mechanical projection systems with optical fiber-based scanning units that use light guidance and spatial modulation. This substitution enables more efficient light delivery and better control over imaging luminance while achieving glasses-free 3D display through optical field manipulation rather than mechanical barriers
2Adaptability or versatility
If lenticular lens 3D technology is used, then glasses-free display is achieved, but viewing angle and image quality are deficient
Solution Approach 1:
The invention employs dynamically scanning optical fiber units that can adjust their projection directions and timing in real-time. This dynamic control enables the system to adapt to different viewing angles and positions, providing flexible viewing coverage without the fixed angular constraints of lenticular lens systems while maintaining glasses-free operation
Solution Approach 2:
The invention transitions from the fixed two-dimensional projection of lenticular lenses to a three-dimensional spatial projection system using optical fiber scanning units. By controlling the spatial position, scanning angle, and timing of multiple scanning units, the system creates virtual object points in three-dimensional space, greatly expanding viewing angle adaptability while maintaining glasses-free display capability
3Manufacturing precision
If directional backlight 3D technology is used, then glasses-free display is achieved, but image depth and image quality are deficient
Solution Approach 1:
The invention performs preliminary calculation and determination of spatial position information and scanning information for each virtual object point before projection. The control module pre-processes the mapping relations between virtual object points and scanning unit parameters, enabling precise control over image depth and quality while maintaining glasses-free operation through optimized light delivery timing and spatial distribution
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
Enables a glasses-free 3D display with improved resolution and viewing angle, enhancing user comfort and application range by projecting a virtual scene in real space, overcoming existing limitations in 3D technology.
Implementation Method 1
an optical fiber scanner array; a light source, which is located on an incident light path of the optical fiber scanner array
Implementation Method 2
an optical fiber scanner array
Implementation Method 3
allowing for high-speed scanning that exploits human persistence of vision to create a glasses-free 3D display
Data Source
AI summary
Disclosed are a projection device and a spatial imaging method. The projection device includes: an optical fiber scanner array; a light source located on an incident light path of the optical fiber scanner array; and an adjustment and control module assembly configured to couple, according to a virtual scene to be displayed, light emitted by the light source into the optical fiber scanner array, and to control the optical fiber scanner array to project pencil beams to a plurality of virtual object points corresponding to the virtual scene and located in space, such that multiple pencil beams projected to each virtual object point form a bundle of emitting light beams.