Dynamic Brightness Control via Histogram Analysis
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Solution Overview
Problem
Existing image display devices face challenges in enhancing brightness and contrast while efficiently managing power consumption, particularly in adapting to the specific characteristics of input images.
Innovation Solution
The solution involves analyzing the histogram of input images to select appropriate brightness controlling functions and adjust pixel component sizes, coupled with power management to optimize luminance and reduce power consumption proportionally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If brightness and contrast enhancement is applied to all images using fixed methods, then image quality improves, but power consumption increases unnecessarily for images that don't require enhancement
Solution Approach 1:
The patent implements dynamic brightness enhancement by analyzing the histogram of each input image and selecting appropriate enhancement functions based on the image's luminance distribution characteristics. The system adapts the enhancement parameters dynamically according to the specific image content rather than applying fixed enhancement to all images, thereby improving brightness only when necessary and reducing unnecessary power consumption.
Solution Approach 2:
The system changes the parameters of brightness enhancement based on the analyzed image characteristics. By calculating histogram parameters such as average luminance and standard deviation, the system selects different enhancement functions and adjusts enhancement strength parameters accordingly. This parameter adaptation allows optimal brightness enhancement while avoiding excessive power consumption on images that already have good luminance distribution.
2Measurement precision
If histogram analysis and model-based brightness control is implemented, then brightness enhancement accuracy improves, but device complexity increases
Solution Approach 1:
The patent segments the image processing task into distinct stages: histogram calculation, parameter extraction, model selection, and brightness enhancement. By dividing the processing workflow into modular segments, the system achieves high brightness control accuracy through systematic analysis while managing complexity through structured organization of processing steps.
Solution Approach 2:
The system introduces histogram analysis as an intermediary step between image input and brightness enhancement. The histogram parameters serve as intermediate representations that capture essential luminance distribution characteristics, enabling accurate model selection and brightness control without requiring direct complex analysis of the entire image data.
3Loss of energy
If power decrease ratio is calculated to offset luminance difference, then energy efficiency improves, but image quality may deteriorate due to brightness loss
Solution Approach 1:
The system applies partial brightness enhancement by calculating a power decrease ratio that offsets only the necessary luminance difference. Rather than over-enhancing all images, the system applies enhancement proportional to the actual need determined by histogram analysis, achieving energy efficiency while maintaining adequate image luminance quality.
Data Source
AI summary
An image display device capable of supporting brightness enhancement and power control and a method thereof, in which the brightness and contrast are enhanced and the power of a light source is controlled in accordance with the image characteristic. In the image display method, a parameter representative of an input image is calculated from a histogram of the input image, a model corresponding to the input image is selected from a plurality of representative models by analyzing the parameter, and then a brightness controlling function matched with the selected model is selected. The size of each component of a pixel constituting the input image is controlled using the brightness controlling function, and the output image of the pixel whose component size has been controlled is displayed.