Display Device Luminance Reduction by Region Segmentation
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Solution Overview
Problem
Display devices like organic electroluminescence displays face challenges in reducing power consumption without compromising image quality, as simply reducing pixel luminance leads to a darker screen and perceived deterioration in image quality.
Innovation Solution
A display device with a division circuit that divides input images into regions based on pixel features, a luminance reduction rate calculation circuit that adjusts luminance reduction rates by region surface area, and an image generation circuit that corrects pixel luminance to maintain image quality by selectively brightening smaller regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the luminance of each pixel is reduced to lower power consumption, then power consumption decreases, but the screen darkens and image quality deteriorates
Solution Approach 1:
The image is divided into multiple regions based on feature quantities (edges, flat areas, etc.), and luminance reduction rates are selectively applied to different regions. This segmentation allows the system to reduce overall power consumption while preserving luminance in visually important regions, thus maintaining perceived image quality.
Solution Approach 2:
Different luminance reduction rates are applied to different regions of the image based on their visual importance. Flat regions with low feature quantities receive higher reduction rates, while edge regions and areas with high feature quantities receive lower reduction rates or no reduction, preserving local image quality where it matters most.
2Use of energy by moving object
If uniform luminance reduction is applied to all pixels, then power consumption decreases, but the entire screen darkens uniformly causing perceived image quality deterioration
Solution Approach 1:
The image is segmented into regions with different visual importance characteristics. By calculating feature quantities for each pixel and grouping them into regions, the system can apply differentiated luminance reduction strategies, avoiding uniform darkening while achieving overall power consumption reduction.
Solution Approach 2:
The patent applies different luminance reduction rates to different regions based on their visual importance. Regions with low feature quantities (flat areas) receive greater luminance reduction, while regions with high feature quantities (edges, transitions) maintain higher luminance, preserving local image quality where it is most critical for perception.
Data Source
AI summary
A display device include a division circuit dividing an input image from a plurality of pixels into a plurality of regions based on the feature quantity of each of the plurality of pixels, a luminance reduction rate calculation circuit calculating the reduction rate of luminance of each region based on the surface area of each of the plurality of regions, an image generation circuit generating output images by correcting the luminance of each of the plurality of pixels based on the reduction rate calculated by the luminance reduction rate calculation circuit, and a correction circuit correcting labels assigned to each of the plurality of pixels by the division circuit. The division circuit is configured to divide the input image by assigning different labels to each region of the plurality of pixels.