OLED Display Brightness Adjustment for Power Reduction
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Solution Overview
Problem
OLED display panels face power consumption and aging issues due to high operational voltage and reduced light emitting efficiency, which are mitigated by reducing brightness, but this leads to decreased contrast and performance.
Innovation Solution
A method and system that calculate the average brightness of pixels, apply a brightness adjustment coefficient to decrease pixel brightness while enhancing contrast, using Gamma transformation and predetermined brightness adjustment curves to optimize power consumption and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the brightness of the display image is reduced to lower power consumption and slow down aging, then the power consumption and aging rate are improved, but the contrastness of the images is reduced which deteriorates display performance
Solution Approach 1:
The patent applies different processing to different brightness regions of the image. By dividing the image into multiple brightness ranges and applying different adjustment coefficients or processing methods to each range, the system maintains contrast in darker regions while reducing overall brightness to lower power consumption. This local differentiation allows simultaneous optimization of both power consumption and contrastness.
Solution Approach 2:
The patent dynamically adjusts display parameters including brightness adjustment coefficients, Gamma voltages, and driving voltages based on the average brightness of the displayed image. By changing these parameters adaptively rather than using fixed values, the system can reduce power consumption while maintaining optimal contrastness through coordinated parameter adjustment.
2Duration of action of stationary object
If the operational voltage is reduced to slow down OLED aging, then the aging rate is improved, but the light emitting efficiency is reduced which affects display quality
Solution Approach 1:
The patent employs dynamic adjustment of driving voltages and Gamma voltages based on real-time calculation of image average brightness. Rather than using static voltage levels, the system continuously adapts voltage parameters to maintain optimal light emitting efficiency while operating at reduced voltage levels to extend OLED life cycle. This dynamic approach allows the system to respond to different image content and maintain performance.
Solution Approach 2:
The system calculates the average brightness of the image to be displayed and uses this information as feedback to adjust the driving voltage and Gamma voltage. This closed-loop control ensures that voltage reduction for aging prevention does not excessively compromise light emitting efficiency, as the system compensates based on actual display requirements.
Data Source
AI summary
A method of reducing the power consumption of the display panels includes: obtaining a brightness of each of pixels of an image to be displayed on the display panel; calculating an average brightness of the image in accordance with the brightness of each of the pixels of the image; obtaining a brightness adjustment coefficient in accordance with the average brightness; decreasing the brightness of each of the pixels of the image in accordance with the brightness adjustment coefficient; and enhancing a contrastness between the pixels of the image in accordance with the brightness adjustment coefficient. In addition, a system of reducing the power consumption of the display panels is also disclosed. In this way, the power consumption of the display panel may be reduced, and the contrastness of the displayed image may be enhanced.