Projection Apparatus Sub-Image Shifting for Resolution Enhancement
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Solution Overview
Problem
Projection apparatuses are limited by the resolution of digital micromirror devices (DMDs), restricting their applications despite receiving high-resolution image data, as they can only project images at a resolution supported by the DMD.
Innovation Solution
A 3D projection apparatus that includes an image control device, a display device, and an image shift device, which generates and shifts sub-image data to create combined images with higher resolutions than the original sub-images, effectively simulating higher image resolutions by overlapping and positioning sub-images on a projection screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution image data is received, then image quality should be improved, but the projection resolution is limited by the DMD hardware
Solution Approach 1:
The projection image is divided into multiple sub-images that are displayed sequentially on the DMD. Each sub-image contains a portion of the pixel data from the original high-resolution image. By segmenting the image and using multiple sequential displays, the system overcomes the DMD's resolution limitation and achieves higher effective projection resolution.
Solution Approach 2:
The system uses periodic display of multiple sub-images in sequence, with each sub-image being displayed for a brief period. The human visual system integrates these sequential displays into a single high-resolution image. This periodic action allows the DMD to project images at a resolution higher than its native capability.
2Manufacturing precision
If the DMD resolution is increased to support higher projection resolution, then projection image resolution is improved, but cost and complexity increase
Solution Approach 1:
Instead of using a single high-resolution DMD, the system segments the image data and displays multiple lower-resolution sub-images sequentially on an existing DMD. This approach achieves high effective resolution without requiring a more complex or expensive high-resolution DMD hardware.
Solution Approach 2:
The system creates multiple copies of portions of the original image data as separate sub-images. Each sub-image is a copy of a specific portion of the high-resolution image, displayed sequentially. This copying approach allows the use of existing DMD hardware to achieve higher effective resolution than the DMD's native capability.
3Manufacturing precision
If multiple sub-images are displayed sequentially, then effective resolution is improved, but display time increases
Solution Approach 1:
The system displays multiple sub-images in rapid succession using periodic action. Each sub-image is displayed for a brief period, and the human visual system integrates these sequential displays into a single high-resolution image. The periodic display rate is optimized to be fast enough that the total display time remains acceptable while achieving the resolution enhancement.
Solution Approach 2:
The image data is pre-processed into multiple sub-images before display. This preliminary segmentation and organization of image data allows for efficient sequential display, reducing the total time required compared to real-time processing during display.
Data Source
AI summary
A projection apparatus includes an image control device, a display device, and an image shift device. The image control device is configured to generate a plurality of left-eye sub-image data according to a left-eye image data and generate a plurality of right-eye sub-image data according to a right-eye image data. The display device is configured to sequentially display a plurality of left-eye images and right-eye images according to the left-eye sub-image data and the right-eye sub-image data. The image shift device is configured to shift the left-eye sub-images from each other and shift the right-eye sub-images from each other.