Display Brightness Boost Timing to Limit Pixel Aging
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Solution Overview
Problem
Existing self-illuminating display devices face accelerated pixel aging due to prolonged increased operation current for brightness enhancement, which degrades luminous efficiency.
Innovation Solution
A display driving device and method that includes an image analysis module to identify brightness boost regions and a brightness adjustment module to control brightness boosting time, executing dimming operations when a preset time threshold is exceeded to prevent over-driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If operation current of pixels is increased to improve image contrast, then brightness is improved, but pixel aging is accelerated
Solution Approach 1:
The patent implements periodic brightness adjustment by alternating between brightness boost periods and dimming periods. The brightness boost operation is executed for a controlled duration, then a dimming operation is performed, creating a cyclic pattern that prevents continuous high current stress on pixels while maintaining image contrast quality over time.
Solution Approach 2:
The system dynamically adjusts brightness based on accumulated time thresholds. The brightness boost operation duration is not fixed but is controlled by monitoring the accumulated time and comparing it against a first preset time length threshold, allowing the system to adaptively manage pixel stress while maintaining display quality.
2Illumination intensity
If brightness boost operation is executed for a long time, then image contrast is improved, but luminous efficiency of pixels deteriorates
Solution Approach 1:
The patent employs periodic brightness adjustment by alternating between brightness boost periods and dimming periods. The brightness boost operation is executed for a controlled duration, then a dimming operation is performed, creating a cyclic pattern that prevents continuous high current stress on pixels while maintaining image contrast quality over time.
Solution Approach 2:
The system uses feedback control by calculating the accumulated time of brightness boost operations and comparing it against a first preset time length threshold. When the threshold is exceeded, the system automatically executes a dimming operation, creating a closed-loop control mechanism that prevents excessive luminous efficiency loss while maintaining display quality.
Data Source
AI summary
A display driving device and a display driving method are provided. The display driving device includes an image analysis module and a brightness adjustment module. The image analysis module analyzes a display data to determine a brightness boost region in a display image corresponding to the display data. The brightness adjustment module is coupled to the image analysis module. The brightness adjustment module executes a brightness boost operation corresponding to the brightness boost region, and calculates an accumulated time of the brightness boost operation. When the brightness adjustment module determines the accumulated time exceeds a first preset time length threshold, the brightness adjustment module executes a brightness dimming operation corresponding to the brightness boost region.