Display Device Luminance Deterioration Compensation
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Solution Overview
Problem
Self-illuminating display devices, such as plasma and organic EL displays, suffer from uneven luminance deterioration leading to 'burn-in' due to variance in emission characteristics, especially when displaying the same image continuously.
Innovation Solution
A display device with a controller that records and adjusts luminance values for each sub-pixel, producing a corrected image when no one is viewing to reduce variance in luminance deterioration by calculating and applying adjusted luminance values based on accumulated luminance differences across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same image is continuously displayed on a self-illuminating display, then the display can maintain consistent content presentation, but variance in luminance deterioration occurs leading to burn-in
Solution Approach 1:
The system performs preliminary detection of accumulated luminance values for each sub-pixel and calculates adjustment amounts before displaying content. By proactively identifying and correcting luminance variations before they manifest as visible burn-in, the system prevents the harmful effect rather than reacting to it after occurrence.
Solution Approach 2:
The system continuously monitors accumulated luminance values across all sub-pixels and uses this feedback information to dynamically adjust drive conditions. The controller modifies the drive signal based on detected luminance variations, creating a closed-loop control system that automatically compensates for deterioration patterns.
2Object-affected harmful factors
If luminance adjustment is applied to reduce burn-in, then variance in luminance deterioration is reduced, but additional processing steps are required
Solution Approach 1:
The display system performs its own self-diagnosis and self-correction by monitoring its own luminance output and automatically adjusting drive conditions. The controller uses built-in detection capabilities to identify luminance variations and applies corrections without requiring external intervention or complex additional hardware components.
Solution Approach 2:
The system adjusts the drive conditions by changing electrical parameters (voltage, current, or pulse width) applied to each sub-pixel based on its accumulated luminance history. By modifying these controllable parameters, the system compensates for luminance deterioration in a straightforward manner that integrates with existing display control infrastructure.
3Reliability
If accumulated luminance values are recorded and adjusted for each sub-pixel, then burn-in is delayed, but data storage and processing requirements increase
Solution Approach 1:
The system divides the display into individual sub-pixel units and tracks luminance accumulation separately for each segment. This segmentation approach allows targeted adjustment of only those sub-pixels that require correction, rather than uniformly adjusting the entire display, thereby optimizing the balance between correction effectiveness and data management overhead.
Data Source
AI summary
Variance in luminance deterioration in a display is suppressed. A display device in which a self-illuminating display element is used to display information comprises a display component in which are disposed a plurality of pixels made up of a plurality of colors of sub-pixels, and a controller for controlling the drive of the display component. The controller records an accumulated luminance for each sub-pixel, and calculates a luminance adjustment amount for each sub-pixel based on the difference between the accumulated luminance values. The controller also detects when no one is viewing the display device, produces a corrected image according to the luminance adjustment amount, and displays the corrected image on the display component while no one is viewing the display device.