Adaptive Luminance Gain Control for OLED Burn-In Mitigation
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Solution Overview
Problem
Existing luminance enhancement technologies for display panels, such as OLED displays, lead to prolonged luminance improvement times that result in element deterioration, particularly burn-in, due to the lack of control over accumulated load increases.
Innovation Solution
A signal processing apparatus and method that measures and accumulates load increases on the display panel during luminance enhancement, adaptively controlling a gain to mitigate element deterioration by referencing the accumulated load increase amount, using temperature and current measurements for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If luminance enhancement is applied to improve display brightness, then luminance is improved, but element deterioration (burn-in) increases
Solution Approach 1:
The patent implements dynamic gain control where the luminance improvement gain is adjusted in real-time based on the accumulated load increase amount. The gain is high when the accumulated load is low to maximize luminance enhancement, and gradually reduced as the accumulated load increases to prevent element deterioration. This dynamic adjustment resolves the contradiction by making the system adaptive rather than static.
Solution Approach 2:
The patent employs a feedback mechanism where the accumulated load increase amount (measured in nits×seconds) is continuously monitored and used to control the luminance improvement gain. The signal processing unit measures the load increase caused by luminance enhancement, accumulates this value, and feeds it back to adjust the gain accordingly. This closed-loop control ensures that luminance enhancement is performed effectively while preventing excessive accumulated load that would cause burn-in.
2Reliability
If accumulated load increase amount is measured and accumulated to control gain, then element deterioration is reduced, but device complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where the display apparatus automatically measures its own load increase, accumulates the data, and adjusts its own gain without requiring external intervention or complex external control systems. The signal processing unit within the display apparatus performs all measurements and control operations autonomously, reducing the need for additional external devices while maintaining reliability.
Data Source
AI summary
The present technology relates to a signal processing apparatus, a signal processing method, and a display apparatus that may reduce the effect of deterioration in element of a display panel. Provided is a signal processing apparatus including a signal processing unit configured to acquire, in changing a video signal from a low luminance display signal to a high luminance display signal by luminance enhancement, an accumulated load increase amount obtained by measuring and accumulating amounts of increase in load on a display panel caused by luminance enhancement, and adaptively control, in reference to the accumulated load increase amount acquired, a first gain for improving luminance of the video signal, according to a degree of effect of deterioration in element of the display panel. The present technology is applicable to self-luminous display apparatuses, for example.