AMOLED Power Control via Frame Data Rate Luminance Adjustment
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Solution Overview
Problem
Active matrix organic light-emitting diode (AMOLED) displays experience high power consumption when displaying images with a high occupancy ratio of bright colors, leading to increased energy usage and reduced battery life in mobile terminals.
Innovation Solution
A power control method and device that calculates the frame data rate, which represents the ratio of light-emitting pixels for specific colors in image data, determines a luminance reducing amount based on this rate, and adjusts the overall luminance of the display to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If AMOLED drives all R, G, and B OLEDS to display bright colors, then color reproducibility and brightness are improved, but power consumption increases
Solution Approach 1:
The patent changes the luminance parameter dynamically based on the frame data rate. When the frame data rate indicates high brightness content, the system adjusts the overall luminance parameter downward to reduce power consumption, while still maintaining acceptable display quality through adaptive parameter control.
2Reliability
If AMOLED drives all R, G, and B OLEDS to display bright colors, then color reproducibility is improved, but battery life decreases
Solution Approach 1:
The system dynamically adjusts the luminance parameter based on the frame data rate analysis. By changing the luminance parameter adaptively rather than maintaining constant high brightness, the patent extends battery life while preserving color reproducibility through intelligent parameter control.
3Use of energy by moving object
If the entire luminance is reduced when displaying images with high bright color occupancy, then power consumption is reduced, but display brightness decreases
Solution Approach 1:
The patent implements dynamic luminance control where the display brightness is adjusted in real-time based on the frame data rate. The system transitions from static high brightness to dynamic adaptive brightness, reducing luminance only when necessary (high bright color occupancy) while maintaining normal brightness otherwise, thus balancing power consumption and display quality.
4Duration of action of moving object
If the entire luminance is reduced when displaying images with high bright color occupancy, then battery life is extended, but image brightness decreases
Solution Approach 1:
The system employs dynamic luminance adjustment based on frame data rate analysis. By making the luminance parameter adaptive rather than static, the patent extends battery life through selective reduction only when displaying high bright color content, while preserving normal image brightness for other content types.
Data Source
AI summary
A method and device for controlling power of an active matrix organic light-emitting diode are provided. The method for controlling power of an active matrix organic light-emitting diode includes: calculating a frame data rate, which is a ratio of a light emitting pixel quantity representing a specific color in an image data to be displayed; determining a luminance reducing amount mapped to the frame data rate; and controlling and displaying an entire luminance of an image according to the luminance reducing amount.