Organic Light-Emitting Display Deterioration Correction via Region Segmentation
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Solution Overview
Problem
Existing display devices with organic electroluminescence technology face challenges in correcting image data over time, especially as the number of pixels increases, due to the enormous amount of information required for deterioration correction, which is difficult to store and manage effectively.
Innovation Solution
A display device and method that calculates and accumulates the deterioration increment of organic light-emitting elements based on gradation data, correcting luminance by dividing the display surface into regions to reduce the amount of information needed for storage and processing, allowing for long-term image data correction even with a large number of pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to improve screen size and definition, then display quality is improved, but the amount of deterioration information becomes enormous and difficult to store
Solution Approach 1:
The patent divides the display screen into multiple regions and calculates average deterioration amounts for each region rather than tracking each pixel individually. This segmentation approach reduces the total amount of deterioration information that needs to be stored while still maintaining effective correction capability across the entire display.
2Measurement precision
If deterioration information for each pixel is stored to enable precise correction, then correction accuracy is improved, but storage capacity requirements increase significantly
Solution Approach 1:
The patent merges the deterioration information of multiple pixels within the same region into a single average deterioration amount. This combining approach maintains correction effectiveness while significantly reducing the storage capacity needed, as only one value per region needs to be stored instead of one value per pixel.
3Reliability
If individual pixel deterioration is tracked to maintain image quality, then image quality is maintained, but the complexity of information management increases
Solution Approach 1:
By segmenting the display into regions and managing deterioration information at the region level rather than the pixel level, the patent simplifies information management while still maintaining image quality through systematic correction of regional average deterioration amounts.
Data Source
AI summary
A display device includes: a deterioration amount increment calculation unit that calculates an increment of a deterioration amount of an organic light-emitting element included in each of pixels, based on gradation data included in image data; a deterioration amount accumulation unit that accumulates, every fixed time, the increment of the deterioration amount calculated by the deterioration amount increment calculation unit; and a correction unit that corrects luminance of the pixel based on a total amount of increments of the deterioration amount accumulated by the deterioration amount accumulation unit.