Display Panel Age Compensation Using Sensing Data
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Solution Overview
Problem
Existing display apparatuses struggle to accurately predict the age of light emitting elements, leading to inadequate grayscale compensation and deteriorated display quality due to inaccurate age calculation.
Innovation Solution
A display apparatus that generates an age compensation value based on sensing data of light emitting elements, using a driving controller to determine a sensed age and accumulated age, and applying this data to compensate grayscale values, thereby enhancing prediction accuracy and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the age of light emitting element is calculated using only accumulated grayscale values, then the calculation is simple, but the age prediction accuracy deteriorates
Solution Approach 1:
The patent combines multiple age calculation methods by merging the accumulated grayscale value method with the sensing data method. The driving controller calculates age through both accumulation of grayscale values and analysis of sensing data from light emitting elements, then integrates these results to determine final age compensation values, thereby improving prediction accuracy while maintaining reasonable computational complexity
Solution Approach 2:
The patent changes the parameters used for age calculation by introducing sensing data parameters (such as luminance characteristics, voltage characteristics, or current characteristics of light emitting elements) in addition to the traditional accumulated grayscale value parameter. This multi-parameter approach enables more accurate age prediction
2Measurement precision
If sensing is performed frequently to improve age prediction accuracy, then the accuracy improves, but user inconvenience increases
Solution Approach 1:
The patent implements periodic sensing action where the driving controller performs sensing at specific intervals or under specific conditions (such as when display content changes significantly or at predetermined time intervals) rather than continuously or frequently. This periodic approach maintains sufficient age prediction accuracy while minimizing user inconvenience and device resource consumption
Data Source
AI summary
A display apparatus includes a display panel, a driving controller and a data driver. The display panel includes a pixel. The driving controller generates an age compensation value using a sensed age generated based on sensing data of the pixel and an accumulated age generated based on accumulated grayscale values of input image data, generates a final age based on the age compensation value, and compensates a grayscale value of the input image data based on a final age to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel.