OLED Luminance Compensation Model Using Accumulated Light Emission
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Solution Overview
Problem
Large-size OLED display devices face issues with spatial and temporal nonuniformity due to varying threshold voltages and the aging of organic materials, leading to decreased luminance over time, which existing luminance compensation methods cannot effectively address.
Innovation Solution
A method and apparatus for establishing a luminance compensation model by acquiring the accumulated light emission amount of a display screen, determining corresponding luminance compensation coefficients based on predefined threshold intervals, and dynamically adjusting display parameters to maintain optimal luminance, using a weighted average of coefficients and theoretical luminance calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If professional equipment is used to compensate for luminance at the factory, then the display device achieves normal luminance initially, but the luminance compensation becomes ineffective as the display device ages
Solution Approach 1:
The patent implements dynamic luminance compensation by continuously monitoring the accumulated light emission amount and adjusting the luminance compensation coefficient in real-time based on the display device's aging stage. This transforms the static factory calibration into a dynamic system that adapts to aging, resolving the contradiction between initial luminance quality and long-term effectiveness.
Solution Approach 2:
The system establishes a feedback mechanism by measuring the actual luminance output, comparing it with theoretical luminance values, and using the accumulated light emission amount as a feedback parameter to determine appropriate compensation coefficients. This closed-loop feedback ensures continuous luminance maintenance throughout the device's service life.
2Productivity
If the display device operates continuously, then productivity is improved, but luminance degradation accelerates due to aging
Solution Approach 1:
The system performs preliminary compensation actions by proactively adjusting luminance parameters based on the accumulated light emission amount before significant luminance degradation occurs. This preventive approach allows continuous operation while maintaining luminance stability, resolving the contradiction between productivity and reliability.
3Reliability
If luminance compensation is performed frequently, then display quality is maintained, but device complexity increases
Solution Approach 1:
The patent segments the luminance compensation process into distinct stages based on accumulated light emission amount thresholds. By dividing the aging process into multiple stages with different compensation strategies, the system maintains display quality consistency while managing complexity through structured segmentation rather than continuous complex adjustments.
Data Source
AI summary
The present disclosure provides a method and an apparatus for establishing a luminance compensation model, a method and an apparatus for compensating for the luminance of a display screen, and a display device. The method for establishing a luminance compensation model for compensating for the luminance of a display screen includes acquiring an accumulated light emission amount of the display screen, if the accumulated light emission amount of the display screen falls within one of a plurality of predefined threshold intervals of light emission amount, determining a luminance compensation coefficient for the display screen corresponding to the one threshold interval of light emission amount, and establishing a luminance compensation model, which indicates a correlation between each of the plurality of threshold intervals of light emission amount and the corresponding luminance compensation coefficient.