Spatially Offset Sub-Frame Display for Defective Pixel Masking
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Solution Overview
Problem
Conventional display systems with defective pixels can replicate defects in the displayed image, making them visible and affecting image quality.
Innovation Solution
The method involves generating and displaying spatially and temporally shifted sub-frames, with specific offset positions chosen based on the location of defective pixels and human visual system characteristics, to minimize the visibility of errors and create the appearance of higher resolution images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional display systems display images using a standard pixel array, then the image is displayed clearly, but defective pixels cause visible defects that degrade image quality
Solution Approach 1:
The patent introduces temporal dimension by displaying multiple sub-frames at different time instances, and spatial dimension by offsetting sub-frames relative to each other. This transforms a static 2D pixel display into a dynamic 4D display (2D spatial + 1D temporal + 1D spatial offset), allowing defective pixels to be distributed across multiple positions and time points, thereby reducing their visual impact
Solution Approach 2:
The patent divides a complete image frame into multiple sub-frames, each containing portions of the image data. By segmenting the image display into multiple sub-frames that are displayed sequentially and spatially offset, the effect of defective pixels in any single sub-frame is diluted across the complete image, reducing the visibility of defects
2Reliability
If spatially offset sub-frames are displayed to mask defective pixels, then defective pixel effects are reduced, but the display system complexity increases
Solution Approach 1:
The patent employs dynamic sub-frame generation and spatial offsetting, where the position and content of sub-frames change over time. This dynamic approach allows the system to adaptively mask defective pixels by distributing their effects across multiple temporal and spatial positions, achieving reliable defective pixel masking without requiring complex hardware modifications
Solution Approach 2:
The patent changes key display parameters including temporal timing (display duration of each sub-frame), spatial position (offset of sub-frames), and data distribution (how image data is divided across sub-frames). By optimizing these parameters, the system achieves effective defective pixel masking while maintaining manageable system complexity through software-based control
Data Source
AI summary
A method of displaying an image with a display device having a set of defective display pixels includes receiving image data for the image. The method includes generating a first sub-frame and a second sub-frame corresponding to the image data. The method includes selecting a first position and a second position spatially offset from the first position, the first and the second positions selected based on positions of the defective display pixels and characteristics of a human visual system. The method includes alternating between displaying the first sub-frame in the first position and displaying the second sub-frame in the second position.