Backlight Partition Control for LCD Brightness Optimization
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Solution Overview
Problem
Current liquid crystal display (LCD) devices lack an efficient method to dynamically adjust backlight brightness based on image content, leading to suboptimal image displaying effects and increased power consumption.
Innovation Solution
A method and apparatus that determine initial backlight values for each partition based on grayscale values of pixels, calculate brightness distribution information, and adjust backlight values using a mapping curve to optimize brightness levels, ensuring better image rendering and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed backlight adjusting curve is used for all image partitions, then device complexity is reduced, but image displaying effect deteriorates due to inability to adapt to different brightness distributions
Solution Approach 1:
The image is divided into multiple image partitions, each corresponding to one or more backlight partitions. This segmentation allows different backlight adjusting curves to be applied to different regions of the image, enabling adaptive brightness control for each partition based on its specific brightness distribution characteristics, thus improving overall image displaying effect without requiring a completely new complex system.
Solution Approach 2:
The patent introduces dynamic backlight adjusting curves that are generated based on the brightness distribution information of each image partition. Instead of using a fixed adjusting curve for all partitions, the system dynamically selects or generates appropriate curves (such as gamma curves with different parameters) to match the characteristics of each partition, enabling adaptive optimization of image quality.
2Ease of operation
If backlight brightness is uniformly adjusted across all partitions, then ease of operation is improved, but power consumption increases due to lack of localized optimization
Solution Approach 1:
The patent applies different backlight adjusting strategies to different image partitions based on their local brightness distribution characteristics. Each partition can have its own customized adjusting curve, allowing the system to optimize power consumption locally by reducing backlight brightness in partitions that do not require high brightness, while maintaining appropriate brightness levels in partitions that need them for proper image rendering.
Data Source
AI summary
The present application provides a method and an apparatus for controlling backlight brightness, and a liquid crystal display device. The method includes: determining, in an image to be displayed, an image block corresponding to each backlight partition of a plurality of backlight partitions, and determining an initial backlight value for each backlight partition; determining brightness distribution information for pixels in an image partition; determining a backlight adjusting curve corresponding to the image partition; and determining a backlight adjusting factor for a backlight partition corresponding to the image partition according to the initial backlight value of the backlight partition corresponding to the image partition and the backlight adjusting curve corresponding to the image partition, and determining a target backlight value for the backlight partition corresponding to the image partition according to the initial backlight value for the backlight partition and the corresponding backlight adjusting factor.