Adaptive Gray Level Remapping for Display Power Reduction
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Solution Overview
Problem
Electroluminescent displays face challenges in reducing power consumption, especially as display resolution and panel size increase, which is crucial for energy-efficient electronic devices like mobile devices and televisions.
Innovation Solution
A method of processing image data involves detecting the distribution of gray levels in frame image data, determining a remapping function to reduce the number of gray levels, and using a filter to provide low-power frame image data, which reduces display power consumption by adjusting pixel values based on their proximity and frequency, thereby minimizing power usage without compromising image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the number of gray levels is reduced to lower power consumption, then power consumption decreases, but image quality may deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the gray level remapping function based on the detected distribution characteristics. Instead of using a fixed reduction ratio, the system modifies the remapping parameters adaptively - when gray levels are concentrated, a stronger compression is applied; when they are dispersed, a milder compression is used. This maintains image quality by preserving important gray level distinctions while still achieving power reduction through fewer displayed gray levels.
Solution Approach 2:
The system implements dynamics by making the gray level remapping process adaptive rather than static. The remapping function is determined in real-time based on the detected gray level distribution of each frame. This dynamic adjustment allows the system to optimize between power consumption and image quality for each specific content scenario, rather than using a one-size-fits-all reduction approach.
2Use of energy by moving object
If image data is processed to reduce power consumption, then power consumption decreases, but processing time increases
Solution Approach 1:
The patent applies partial action by selectively processing only the necessary aspects of image data for power reduction. Instead of performing complex full-image processing, the system focuses on detecting gray level distribution statistics and applying a remapping function. This selective processing approach achieves sufficient power reduction without the computational overhead of more comprehensive image processing techniques.
Solution Approach 2:
The system implements preliminary action by detecting the gray level distribution before applying the remapping function. This preliminary detection step allows the system to prepare an appropriate remapping strategy in advance, avoiding the need for iterative or post-processing adjustments that would increase processing time. The pre-computed remapping function is then applied efficiently to the entire frame.
3Use of energy by moving object
If gray levels are remapped based on distribution detection, then power consumption decreases, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the power reduction process into distinct functional modules: a detection unit that analyzes gray level distribution, a determination unit that creates the remapping function, and a processing unit that applies the remapping. This modular segmentation allows each component to be optimized independently and simplifies the overall system architecture, making it easier to implement and maintain while achieving power reduction.
Solution Approach 2:
The system introduces an intermediary remapping function that acts as a mediator between the original image data and the display output. This intermediary layer transforms the gray level values based on the detected distribution without requiring fundamental changes to the display hardware or driver software. The remapping function serves as a lightweight intermediary that enables power reduction while maintaining compatibility with existing display systems.
Data Source
AI summary
To process image data, a distribution of gray levels of frame image data is detected. A remapping function for providing remapped gray levels is determined based on the distribution of the gray levels such that a number of the remapped gray levels is less than a number of the gray levels. Low-power frame image data are provided based on the frame image data and the remapping function such that displaying the low-power frame image data uses less power than the frame image data.