Backlight Adjustment for Display Devices Using Edge Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices using dynamic backlight control often result in insufficient backlight luminance during dark scenes with objects, leading to poor representation of details due to low image loading adjustments.
Innovation Solution
A method that generates two backlight adjusting variables: one based on image loading and another through edge detection, allowing for dynamic adjustment of backlight luminance to enhance detail representation in low grayscale scenes with edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If dynamic backlight control adjusts backlight luminance according to image loading, then power consumption is reduced, but image quality deteriorates due to insufficient backlight luminance in dark scenes with objects
Solution Approach 1:
The patent segments the image into different regions based on edge detection results, identifying edge regions and non-edge regions separately. This allows the system to apply different backlight adjustment strategies to different regions, maintaining image quality in edge regions while still achieving power savings in non-edge regions.
Solution Approach 2:
The patent applies local quality by adjusting backlight luminance differently for edge regions versus non-edge regions. Edge regions maintain higher backlight luminance to preserve detail representation, while non-edge regions use reduced backlight luminance to save power, creating spatially varying quality characteristics.
2Loss of energy
If backlight luminance is reduced in dark scenes, then power consumption decreases, but detail representation deteriorates due to compressed dynamic range
Solution Approach 1:
The patent performs preliminary edge detection and image loading analysis before adjusting backlight luminance. By identifying regions with important details (edges) in advance, the system can pre-determine which regions require maintained backlight luminance to preserve detail representation, preventing information loss before it occurs.
Solution Approach 2:
The patent uses feedback from edge detection results and image loading analysis to dynamically adjust backlight luminance. The system continuously monitors image characteristics and adjusts backlight levels accordingly, ensuring that detail representation is maintained in regions where it matters while allowing power savings elsewhere.
Data Source
AI summary
Adjust a backlight of a display device according to image loading and edge statistics of an input image. When the input image is a dark scene and includes relatively more edges, a luminance of the backlight would be controlled according to the image loading of the input image and compensated the backlight for showing details of the input image clearly. When the input image is a dark scene with negligible edges, the luminance of the backlight would be controlled by image loading with no or few compensation for lowering the power consumption. When the input image is a bright scene, or when the input image includes no edge or only negligible edges, minimum compensation is applied to the backlight for lowering the power consumption.