Display Pixel Sub-frame Shifting for Resolution and Defect Correction
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Solution Overview
Problem
Conventional image display systems face challenges in achieving higher resolution without increasing the cost and complexity of the display device, as higher resolution image data may not be available or easily generated, and systems like digital light projectors may not have sufficient resolution to display high-resolution images effectively.
Innovation Solution
The method involves generating and displaying spatially and temporally shifted sub-frames with pixel and sub-pixel offsets, using algorithms like nearest neighbor and bilinear to create low-resolution sub-frames from high-resolution images, and adjusting sub-frame pixel values to compensate for defective pixels, thereby simulating higher resolution images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the resolution of the display device is increased to achieve higher image resolution, then the image resolution is improved, but the cost and complexity of the display device increases
Solution Approach 1:
The image is divided into multiple sub-frames that are displayed sequentially at different spatial positions. Each sub-frame contains a portion of the final high-resolution image, and by combining these segmented sub-frames through temporal and spatial multiplexing, the system achieves high effective resolution without requiring all pixels to be present simultaneously in the display device
Solution Approach 2:
The patent transitions from spatial resolution alone to a combination of spatial and temporal dimensions. By displaying sub-frames at different time instances and spatial positions, the system effectively increases the resolution capability without physically increasing the number of display pixels, utilizing the time dimension to compensate for spatial limitations
2Manufacturing precision
If the resolution of the display device is increased to achieve higher image resolution, then the image resolution is improved, but the cost of the display device increases
Solution Approach 1:
Multiple copies of the same physical pixel are used sequentially to represent different pixel positions in the final high-resolution image. The display device pixels are copied across time and space through sub-frame replication and spatial shifting, allowing a limited number of physical pixels to effectively represent a larger number of logical pixels
3Manufacturing precision
If higher resolution image data is used to improve image quality, then the image resolution is improved, but the availability of such data decreases and generation difficulty increases
Solution Approach 1:
The system performs preliminary processing of available lower-resolution image data by dividing it into multiple sub-frames before display. Through preprocessing steps including sub-frame generation, spatial offset calculation, and temporal sequencing, the system prepares the image data in advance to maximize the effective resolution achievable from the available source data
Data Source
AI summary
A method of displaying an image with a display device having at least one defective display pixel is provided. The method comprises generating first, second, and third sub-frames using image data for the image, information that identifies the at least one defective display pixel, a first pixel offset associated with the second sub-frame, and a sub-pixel offset associated with the third sub-frame, and alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position spatially offset from the first position according to the first pixel offset, and displaying the third sub-frame in a third position spatially offset from the first position and the second position according to the sub-pixel offset.