Adaptive Frame Rate Control for OLED Burn-in Prevention
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Solution Overview
Problem
Existing OLED display technologies face challenges in preventing the burn-in phenomenon and maintaining image quality, especially when displaying still images, as current frame rate control methods are not adaptive to the type of image or panel used.
Innovation Solution
An image processing device that divides the display image into blocks, generates brightness distributions in multiple directions, determines the image type based on these distributions, and performs frame rate control accordingly, using modes such as interlaced scanning, frame rate reduction, image thinning, and image shifting to reduce flicker and extend panel lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If frame rate control is performed on OLED display to prevent burn-in phenomenon, then the lifetime of display panel is extended, but image quality may deteriorate due to flicker or loss of gray scale gradation
Solution Approach 1:
The patent applies dynamics by making the frame rate control adaptable and variable based on image characteristics. The system dynamically adjusts the frame rate control strategy according to the detected image type (still image, moving image, gradient image, etc.) and panel type, rather than using a fixed frame rate control method. This allows the system to optimize between burn-in prevention and image quality maintenance based on real-time conditions.
Solution Approach 2:
The patent changes the parameter of frame rate control based on image characteristics and panel type. By detecting image types (still, moving, gradient, etc.) and panel types (OLED, LCD), the system adjusts frame rate control parameters to achieve optimal balance between preventing burn-in and maintaining image quality, expressed as higher image quality and burn-in prevention regardless of display panels or display images.
2Reliability
If frame rate control is performed at high speeds on OLED to express more gray scale gradation, then image quality is improved, but the burn-in phenomenon may occur more frequently
Solution Approach 1:
The system dynamically adjusts frame rate control speed based on image characteristics. For images with high burn-in risk (still images, images with large bright areas), the system reduces frame rate control speed to prevent burn-in. For images where image quality is more critical and burn-in risk is lower, the system can maintain higher frame rate control speeds to express more gray scale gradation.
Solution Approach 2:
The patent changes the frame rate control parameter based on image type detection. When still images or images with large bright areas are detected, the system reduces the frame rate control parameter to prevent burn-in. When moving images or images with balanced brightness are detected, the system can maintain higher frame rate control parameters to improve image quality through more gray scale gradation.
3Device complexity
If conventional frame rate control is performed regardless of image type, then the control process is simple, but image quality cannot be improved or burn-in cannot be satisfactorily prevented for all display scenarios
Solution Approach 1:
The patent applies preliminary action by detecting image characteristics before performing frame rate control. The system first detects the image type (still image, moving image, gradient image, etc.) and panel type, then selects the appropriate frame rate control strategy based on the detection results. This preliminary detection and classification enables the system to apply the most effective burn-in prevention method for each specific scenario.
Solution Approach 2:
The system uses feedback from image type detection and panel type detection to adjust the frame rate control strategy. By continuously monitoring image characteristics and comparing them against predefined thresholds, the system feedback-adjusts the frame rate control parameters to achieve optimal burn-in prevention and image quality maintenance for each specific display scenario.
Data Source
AI summary
An image processing device performing a frame rate control a display timing control signal corresponding to an image data, includes: a brightness distribution generating unit that generates a brightness distribution on the basis of the image data; an image type determining unit that determines a type of an image on the basis of the brightness distribution; and a frame rate control unit that performs frame rate control corresponding to the determined image type.