Pixel Aging Compensation Using Attenuation Model
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Solution Overview
Problem
Display panels experience image sticking due to varying aging degrees of pixels, leading to inconsistent light-emitting luminance and reduced display effect and user experience, as existing methods fail to accurately account for temperature and position factors influencing pixel aging.
Innovation Solution
A method and apparatus that determine aging degrees of pixels by using an attenuation model based on electric current, temperature, and position data, with a compensation mechanism to adjust display luminance, ensuring consistent light-emitting performance across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel aging is not compensated, then display panel manufacturing and operation is simple, but image sticking occurs and display effect deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing an attenuation model in advance that predicts pixel aging based on temperature and position data. The compensation value is calculated beforehand using the formula Lcomp = L0 × (1 + k × T × P), where L0 is initial luminance, k is attenuation coefficient, T is temperature factor, and P is position factor. This pre-calculated compensation data is then applied to correct display data before output, preventing image sticking without requiring complex real-time monitoring systems.
Solution Approach 2:
The patent uses parameter changes by introducing temperature and position as key parameters that influence pixel aging. The attenuation model incorporates these parameters to calculate compensation values: Lcomp = L0 × (1 + k × T × P). By changing the display data based on these parameters rather than treating all pixels uniformly, the system achieves reliable display effect compensation while maintaining relatively simple implementation.
2Manufacturing precision
If uniform display data is used for all pixels, then data processing is simple, but pixels with different aging degrees show inconsistent luminance causing image sticking
Solution Approach 1:
The patent applies local quality by recognizing that different pixels have different aging characteristics based on their position and operating temperature. Instead of applying uniform compensation to all pixels, the system calculates position-specific compensation values using the attenuation model Lcomp = L0 × (1 + k × T × P), where P represents the position factor. This allows each pixel region to receive customized compensation data, achieving luminance consistency across the display panel while maintaining efficient processing through the standardized model approach.
3Duration of action of stationary object
If pixel aging is ignored, then operation is simple, but display panel lifespan is reduced due to image sticking
Solution Approach 1:
The patent extends display panel lifespan by applying preliminary action through the attenuation model that predicts pixel aging before it causes visible degradation. The compensation value Lcomp = L0 × (1 + k × T × P) is calculated based on temperature and position factors, allowing the system to proactively adjust display data and prevent image sticking. This preventive approach maintains panel performance over time without requiring complex real-time monitoring or replacement mechanisms.
Data Source
AI summary
A method, apparatus, and device for determining aging degrees of pixels in a display panel, and a method, apparatus, and device for compensating display luminance of pixels. The method for determining the aging degrees of the pixels in the display panel includes: for each pixel of at least a part of pixels in the display panel that includes multiple pixels, determining electric current data and temperature data of the pixel; and based on the determined current data and temperature data, calculating aging degree data of the pixel according to an attenuation model.