AMOLED Display Luminance Adjustment for Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
AMOLED displays face high power consumption issues, leading to reduced brightness and deteriorated picture quality when trying to lower power usage, as collective reduction in image driving voltage affects overall screen brightness and user visibility.
Innovation Solution
A method and device that adjust the luminance of specific pixels based on their distribution, lowering only the luminance of pixels in predominantly white regions to a reference value while maintaining image region luminance, thereby reducing power consumption without compromising picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the image driving voltage is collectively lowered to save power consumption, then power consumption is reduced, but the brightness of unwanted portions of the image is reduced deteriorating picture quality
Solution Approach 1:
The patent segments the display area into different regions (effective image display regions and non-effective regions such as background or unwanted portions). By applying different luminance adjustment strategies to different segments, the system can lower power consumption in non-effective regions without affecting the brightness and picture quality of effective image regions.
Solution Approach 2:
The patent applies local quality adjustment by selectively modifying luminance values only in specific regions where it is appropriate (such as background areas or non-effective portions), while maintaining original luminance characteristics in effective image display regions. This localized approach reduces overall power consumption without compromising picture quality of the main content.
2Use of energy by moving object
If the brightness of pixels is adjusted according to the AMOLED gamma curve, then power consumption is reduced, but the brightness of the whole screen is lowered reducing user visibility
Solution Approach 1:
The patent divides the display into effective image regions and non-effective regions, applying gamma curve adjustment only to non-effective regions. This segmentation allows power consumption reduction in background areas while maintaining full brightness and visibility in effective regions where users need to see content clearly.
Solution Approach 2:
The patent applies local quality differentiation by adjusting luminance characteristics selectively - applying gamma curve adjustment locally to non-effective regions for power savings, while preserving original luminance properties in effective regions to ensure user visibility and interaction quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption by up to 26% while maintaining image quality and user visibility, as demonstrated by the reduction in current consumption and preserved image quality.
Implementation Method 1
Organic Light Emitting Diodes (OLED) is a self-luminescence display in which, if current flows to a phosphorous or phosphorescent organic thin film, electrons and holes are bonded on an organic layer to emit light.
Data Source
AI summary
A low power display and a method for display in a display device having an Active Matrix Organic Light Emitting Diodes AMOLED panel are provided. A display window that includes content to be displayed on the AMOLED panel is determined. Luminance values of pixels constituting the display window are grasped. The pixels having luminance values that are to be adjusted are determined in accordance with a distribution degree of pixels having luminance values that are larger than a reference luminance value. The luminance values of the determined pixels are changed to the reference luminance value, and the display window is displayed on the AMOLED panel with the changed luminance values.