Image Compensation for Display Power Reduction
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Solution Overview
Problem
Display devices experience reduced image visibility due to decreased brightness caused by power shortages, with existing methods failing to effectively compensate for this reduction in image quality.
Innovation Solution
An image compensation method and apparatus that adjusts pixel values by dividing grayscale into sections, maintaining low-luminance values and increasing medium- and high-luminance values to enhance both brightness and contrast, thereby compensating for power reductions in display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power consumption is reduced to extend battery life, then energy efficiency is improved, but image visibility and quality deteriorate
Solution Approach 1:
The patent segments the grayscale range into multiple sections (first section for lower luminance values, second section for higher luminance values) and applies different compensation strategies to each segment. This allows selective adjustment of pixel values to maintain visibility while managing power consumption effectively.
Solution Approach 2:
The patent changes the luminance parameters of pixel values through compensation functions. When power consumption decreases, the system adjusts pixel values by applying compensation functions that increase luminance in specific grayscale sections, thereby maintaining image visibility despite reduced power supply.
2Illumination intensity
If brightness is increased to maintain image visibility, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating treatment across different grayscale sections. Instead of uniformly increasing all pixel values, it selectively compensates specific sections (particularly the first section with lower luminance values) based on their specific needs, thereby reducing overall power consumption while maintaining visibility where most needed.
Solution Approach 2:
The patent applies partial action by compensating only certain pixel value ranges rather than all pixels. The compensation function selectively adjusts pixel values in the first grayscale section while leaving the second section less affected, achieving visibility maintenance with minimal power expenditure.
3Device complexity
If simple brightness control is used to manage power, then device complexity is reduced, but image quality compensation is insufficient
Solution Approach 1:
The patent introduces dynamic image compensation that adapts to varying power consumption conditions. The system continuously monitors power status and dynamically adjusts pixel values using compensation functions, transforming a static brightness control approach into a dynamic quality preservation mechanism without requiring complex hardware modifications.
Solution Approach 2:
The patent introduces an image compensation module as an intermediary between the power management system and the display output. This module processes original image data, applies compensation functions based on power status, and generates compensated images, thereby bridging the gap between simple power control and high-quality image output.
Data Source
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AI summary
The invention relates to an image compensation apparatus in use being connected to a light emitting unit, the image compensation apparatus comprising: a control parameter generation module configured to receive an original image; an image compensation module connected to the control parameter generation module, which, in case of a decrease in supply or consumption of power of the light emitting unit, when the light emitting unit is driven at less than maximum power thereof, is configured to convert the received image information in case of the decrease in supply or consumption of power of the light emitting unit; and an output connected to the image compensation module to output image information obtained from the image compensation module to the light emitting unit, wherein the control parameter generation module is configured to determine a threshold (TH) at a luminance value above zero, in correspondence with the decrease in supply or consumption of power of the light emitting unit; the image compensation module is configured to convert the received image information per pixel in correspondence with the decrease in supply or consumption of power of the light emitting unit and with a comparison of a luminance value per pixel of the received image information with the threshold (TH) by performing no compensation on luminance values of pixels in received image signals below the threshold (TH) for a low gray-scale area in the original image to enhance contrast and at a maximum luminance value, and by increasing luminance values relative to received image information per pixel above the threshold (TH) and below the maximum luminance level for medium- and high-grayscale areas in the original image to enhance brightness.