Display Device Pixel Shift Memory Reduction
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Solution Overview
Problem
Display devices, such as organic light emitting and liquid crystal displays, experience pixel degradation leading to afterimages due to prolonged image display, which existing pixel shift technologies do not adequately address by efficiently reducing memory usage for image data storage during pixel shifting operations.
Innovation Solution
A display device and method that includes a processor generating image data and timing control signals, an image corrector shifting the timing control signals to account for positional relationships between pixels, and a data driver generating data signals based on the shifted signals, allowing for reduced memory usage by pre-storing and recombining image data in line memory units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel shift technology is implemented to reduce afterimages, then pixel degradation is reduced, but memory usage increases due to storing image data for shifting operations
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing only the positional relationship information (mapping data) between original pixels and target pixels before the pixel shift operation. This allows the system to perform pixel shifting using minimal pre-stored data rather than storing complete image frames, thereby reducing memory requirements while maintaining the pixel degradation resistance benefit
Solution Approach 2:
The patent implements local quality by storing only the essential positional mapping information (which pixels need to be shifted to which positions) rather than storing complete image data. This selective storage approach keeps memory usage low while still enabling the pixel shift function to prevent afterimages effectively
2Reliability
If image data is stored in line memory for pixel shifting, then pixel degradation is prevented, but the complexity of the display system increases
Solution Approach 1:
The patent extracts only the essential positional relationship information from the complete image data and stores it in line memory. By separating the positional mapping data from the full image data, the system achieves pixel degradation prevention with reduced memory requirements and simplified system architecture
Solution Approach 2:
The patent segments the image data processing into two parts: storing only positional mapping information in line memory and retrieving full image data from external memory when needed. This segmentation reduces the burden on line memory and simplifies the overall system complexity while maintaining pixel shift functionality
Data Source
AI summary
A display device and a method of operation that can reduce memory utilization during a pixel shift operation. The device includes a display panel including a first pixel and a second pixel, a processor configured to generate a first image data corresponding to the first pixel, and a first timing control signal. An image corrector is configured to generate a second image data corresponding to the second pixel based on the first image data, and shift the first timing control signal by using a positional relationship between the first pixel and the second pixel to generate a second timing control signal. A data driver is configured to generate a data signal based on the second image data and the second timing control signal.