Display Life Prediction Using Temperature-Corrected Luminance Trends
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Solution Overview
Problem
Existing life prediction systems for display devices, such as liquid crystal display devices, are inaccurate due to temperature-dependent luminance measurements and failure to consider varying operating environments, leading to impaired prediction accuracy.
Innovation Solution
A method that repeatedly measures display-related characteristic values and temperatures, derives approximation lines or curves, corrects for temperature differences, and recalculates predictions until errors meet a predetermined condition, reducing temperature dependence and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If luminance is measured using an optical sensor, then the measurement process is simple, but the measured luminance becomes highly temperature-dependent and prediction accuracy is impaired
Solution Approach 1:
The patent changes the measurement parameters by simultaneously measuring both luminance and temperature, then using temperature as a correction parameter to adjust the luminance measurements. This allows the simple optical sensor measurement process to be maintained while compensating for temperature effects through parameter transformation and correction calculations.
Solution Approach 2:
The patent implements a feedback mechanism where temperature measurements are continuously fed back into the luminance prediction model to correct for temperature-dependent variations. The system repeatedly measures both luminance and temperature, uses the temperature data to adjust the luminance readings, and recalculates predictions until convergence is achieved, ensuring accurate predictions despite environmental variations.
2Productivity
If a simple prediction method using only two luminance measurements is employed, then the prediction process is efficient, but the prediction accuracy is impaired due to exceptional measurement results from varying environments
Solution Approach 1:
The patent performs preliminary actions by repeatedly measuring both luminance and temperature before making predictions. It collects multiple data points under varying environmental conditions and uses these pre-collected measurements to build a more robust prediction model, thereby improving reliability without significantly increasing the overall prediction time.
Solution Approach 2:
The patent uses iterative feedback where predictions are repeatedly calculated and compared against actual measurements. The system adjusts its prediction model based on the differences between predicted and actual values, continuing this process until the predictions converge to acceptable accuracy. This feedback loop ensures reliable predictions while maintaining efficiency through automated iteration.
3Device complexity
If the life prediction system does not consider varying operating environments, then the prediction method remains simple, but the prediction accuracy is impaired due to temperature variations affecting display characteristics
Solution Approach 1:
The patent creates a universal prediction system that handles multiple operating environments through a single integrated approach. By incorporating temperature measurement and correction capabilities into the existing luminance measurement system, it achieves multi-functionality that accounts for varying environmental conditions without requiring separate prediction methods for different scenarios.
Solution Approach 2:
The patent addresses environmental variations by introducing temperature as an additional measurement parameter and using it to correct luminance measurements. Through parameter transformation and correction calculations, the system adapts to different operating conditions while maintaining a relatively simple prediction framework, thus improving measurement precision without dramatically increasing system complexity.
Data Source
AI summary
A life prediction method and device that can predict the life of a display device considering the differences between temperatures at measurements of the luminance of the display device. A monitor measures the luminance of the display screen using an optical sensor and measures the temperature around the display screen using a temperature sensor. A terminal device stores the measured luminances and temperatures in such a manner that the luminance and temperature are associated with each other. On the basis of the measured luminances and temperatures obtained by repeated measurements, the terminal device predicts the trend of changes in the luminance assuming that the temperatures at the measurements have been approximately constant, and predicts the life of the monitor on the basis of the predicted change trend.