3D Projection Device Using Pixel Group Segmentation for High Frequency Output
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Solution Overview
Problem
Conventional 3D projection technologies face limitations in achieving high resolution and frequency due to the bandwidth constraints of digital micromirror devices (DMDs), resulting in a trade-off between resolution and frequency, and require image compression when input signals exceed 2K resolution, leading to decreased image quality.
Innovation Solution
A 3D projection method and device that processes and projects images by dividing eye images into pixel groups, generating and sequentially projecting multiple projection images from these groups using an image processing device and an image shifting device, enabling higher frequency projection without reducing resolution by utilizing a 4-way actuator to shift images diagonally and project them onto a surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a 1920*1080 DMD with four-way actuator is used to achieve 4K resolution through XPR technology, then the resolution is improved to 4K, but the frequency is limited to 60 Hz due to bandwidth constraints
Solution Approach 1:
The patent segments the projection process into multiple sub-projections within each frame period. Instead of projecting all pixels sequentially, it divides the pixel set into multiple subsets and projects them in parallel through multiple sub-projections, thereby increasing the effective frame rate while maintaining 4K resolution through the four-way actuator's XPR technology
Solution Approach 2:
The patent implements periodic sub-projections within each frame period, where multiple sub-projections are performed in succession at higher frequency intervals. This periodic segmentation of the projection timeline allows the system to achieve effective frame rates above 120 Hz by completing multiple sub-projections within a single 1/60 second frame period
2Speed
If the frequency is increased above 60 Hz for 3D projection, then the 3D projection capability is improved, but the resolution must be reduced due to bandwidth limitations
Solution Approach 1:
The patent segments both the spatial pixel data and temporal projection timeline. By dividing pixels into multiple groups and projecting them in parallel sub-projections, it achieves high frequency 3D projection without compromising the native 4K resolution capability of the DMD device
Solution Approach 2:
The patent introduces an additional temporal dimension by performing multiple sub-projections within each frame period. This dimensional expansion in the time domain allows the system to achieve high frame rates for 3D projection while maintaining full spatial resolution through parallel processing of pixel groups
3Productivity
If the native DMD resolution is used without XPR processing, then the bandwidth requirement is reduced, but the resolution is limited to 2K and image compression is required for higher resolution inputs
Solution Approach 1:
The patent segments the high-resolution image data into multiple lower-resolution sub-projections that can be processed and displayed within the DMD's native resolution capabilities. By dividing the 4K pixel set into groups that fit within 2K constraints and projecting them sequentially through multiple sub-projections, it maintains effective 4K resolution while operating within native bandwidth limits
Data Source
AI summary
A 3D projection method and a 3D projection device are provided. The method includes: obtaining first and second eye images, wherein the first and second eye images respectively includes multiple first and second pixel groups, and each first and second pixel group includes a first, second, third, and fourth pixel; respectively generating a first and third projection image based on the first and third pixel of the first pixel group; respectively generating a second and fourth projection image based on the second and fourth pixel of the second pixel group; and sequentially projecting the first, second, third and fourth projection images. The first and third projection images correspond to the first eye image, the second and fourth projection images correspond to the second eye image, and the first and second eye images are respectively one and another of the left eye image and the right eye image.