OLED Luminance Compensation for Uniformity Without Accelerated Aging
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Solution Overview
Problem
OLED display panels experience uneven luminance and accelerated aging due to differences in device aging, with existing compensation methods shortening the device life by increasing current, rather than prolonging it.
Innovation Solution
A luminance compensation method that involves obtaining luminance values of each subpixel, determining a minimum luminance value, comparing it to a standard value to calculate a compensated luminance value, and driving all subpixels with this value to achieve uniform luminance and reduce aging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing compensation method increases current to compensate luminance, then luminance uniformity is improved, but device life is shortened and aging is accelerated
Solution Approach 1:
The patent changes the compensation parameter from current increase to luminance-based adjustment. By measuring actual luminance values and calculating compensation coefficients based on luminance ratios, the system achieves uniformity compensation without increasing current, thus avoiding accelerated aging while maintaining luminance uniformity across subpixels
Solution Approach 2:
The patent implements a feedback mechanism by measuring actual luminance values of subpixels, comparing them against standard values, and adjusting driving parameters based on the measured deviations. This closed-loop feedback allows precise compensation without excessive current increase, thereby preserving device life while achieving uniformity
2Manufacturing precision
If existing compensation method increases current to compensate luminance, then luminance uniformity is improved, but aging speed is accelerated
Solution Approach 1:
The patent transitions from current-based compensation to luminance-based compensation. By using luminance measurements and derived compensation coefficients to adjust driving parameters, the system achieves uniformity correction without the harmful effect of increased current, thus reducing aging speed while maintaining reliability
Solution Approach 2:
The patent converts the measured luminance deviation (which indicates aging) into a beneficial compensation mechanism. By calculating compensation coefficients from luminance ratios and applying them to adjust driving parameters, the system turns the indicator of aging into a tool for uniformity maintenance without accelerating the aging process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method improves luminance uniformity and reduces the aging speed of OLED display panels, thereby prolonging their lifespan.
Implementation Method 1
An Organic Light Emitting Diode (OLED) is a current-type organic light emitting device that emits light through the injection and recombination of carriers, and the emission intensity is proportional to the injected current
Data Source
AI summary
The present disclosure provides a luminance compensation method and device therefor, a readable storage medium, and a display device, in the present disclosure, the luminance values of all the subpixels are obtained, and then the luminance value of the subpixel with the most serious aging degree among all the subpixels, that is, the minimum luminance value is obtained. Then, the minimum luminance value is compared with the standard luminance value to obtain the compensated luminance value, and then the compensated luminance value is used to drive all the subpixels, so that the uniformity of the luminance of the display device is improved.