Organic Light Emitting Display Data Accumulator Compression
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Solution Overview
Problem
Organic light emitting displays face degradation issues due to uneven stress and light emission across pixels, leading to image quality deterioration over time, which existing technologies fail to address effectively.
Innovation Solution
An organic light emitting display system that includes a data accumulator and a data compensator to efficiently compress and accumulate stress data, identifying regions of higher degradation and adjusting compression ratios to maintain image quality by compensating for pixel stress, using a combination of gray-stress converters, compressors, and memory to store and process image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stress data is accumulated without compression, then measurement precision of degradation is improved, but memory capacity requirements increase
Solution Approach 1:
The patent applies different compression ratios to different regions of the display panel based on their degradation characteristics. High-compression ratio is applied to regions with lower degradation (can tolerate more compression), while low-compression ratio or no compression is applied to regions with higher degradation (require higher measurement precision). This local differentiation resolves the contradiction by optimizing memory usage while maintaining sufficient precision where needed.
Solution Approach 2:
The patent dynamically adjusts the compression ratio parameter based on the accumulated stress data and region-specific degradation analysis. By changing the compression parameter adaptively rather than using a fixed ratio, the system can maintain measurement precision for critical regions while achieving higher compression for less critical regions, thus reducing overall memory requirements.
2Device complexity
If uniform compression ratio is applied to all regions, then device complexity is reduced, but measurement precision of degradation varies across regions
Solution Approach 1:
The patent divides the display panel into multiple regions and applies different compression ratios to each region based on its specific degradation characteristics. This local quality approach increases processing complexity slightly but significantly improves measurement precision for each region, resolving the contradiction by prioritizing accuracy where it matters most.
Solution Approach 2:
The patent implements a dynamic compression strategy where the compression ratio is not fixed but adapts based on accumulated stress data and region analysis. The system dynamically adjusts compression parameters during operation, allowing optimal precision for each region while managing overall complexity through automated decision-making processes.
3Quantity of substance
If high compression ratio is applied to all data, then memory capacity is reduced, but loss of information increases
Solution Approach 1:
The patent applies high compression ratios selectively to regions where information loss is acceptable (regions with lower degradation), while using lower compression or no compression for regions requiring high precision (regions with higher degradation). This local differentiation maintains sufficient stress data accuracy where needed while significantly reducing overall memory capacity requirements.
Solution Approach 2:
The patent uses accumulated stress data as feedback to determine appropriate compression ratios for different regions. By continuously monitoring and analyzing stress accumulation patterns, the system adjusts compression parameters to maintain sufficient data accuracy, preventing information loss in critical regions while optimizing memory usage overall.
Data Source
AI summary
An organic light emitting display and a method for driving the organic light emitting display. The organic light emitting display includes a display unit, a data accumulator, and a data compensator. The display unit is configured to be driven by image data. The data accumulator is configured to compress and accumulate first data corresponding to a first portion of the image data for driving a first region of the display unit, identify a second region of the display unit from the first region by analyzing the accumulated first data, and compress and accumulate second data corresponding to a second portion of the image data for driving the second region with a compression ratio based on a size of the second region. The data compensator is configured to compensate the image data based on the accumulated first and second data.