Self-Luminous Display Power Reduction via High-Frequency Component Scaling
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Solution Overview
Problem
Self-luminous display apparatuses, such as OLEDs, consume high power due to proportional luminance to current flow, making it challenging to reduce power consumption without deteriorating image quality, especially in mobile devices with unstable power supply.
Innovation Solution
An image processing apparatus that dynamically controls power consumption by selecting parameters to adjust the reduction degree, calculating scale factors based on high-frequency components, spatial and temporal gradients, and luminance components of input images, and multiplying pixel values by these scale factors to output adjusted luminance components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of self-luminous display is increased, then the image quality is improved, but the power consumption increases proportionally
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different image regions. High-frequency components (edges, details) are preserved with original luminance to maintain image quality, while low-frequency components (smooth areas) have their luminance reduced to save power. This selective approach allows different parts of the image to have different luminance levels based on their visual importance.
Solution Approach 2:
The patent implements dynamics by dynamically adjusting the luminance of different pixel regions based on real-time analysis of image content. The processing unit continuously evaluates high-frequency and low-frequency components and adjusts drive signals accordingly, allowing the display to adapt its power consumption to the actual visual requirements of each displayed image.
2Use of energy by moving object
If the power consumption is reduced by uniformly lowering luminance, then energy efficiency is improved, but the perceived image quality deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different image regions. High-frequency components (edges, details) are preserved with original luminance to maintain image quality, while low-frequency components (smooth areas) have their luminance reduced to save power. This selective approach allows different parts of the image to have different luminance levels based on their visual importance.
Solution Approach 2:
The patent leverages human visual system characteristics regarding luminance perception. By preserving high-frequency components that contain edge and detail information, the display maintains perceived image quality even when overall luminance is reduced in low-frequency areas, exploiting the way human vision prioritizes certain spatial frequencies.
3Use of energy by moving object
If the luminance is dynamically adjusted based on image content, then power consumption is reduced, but the processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the image processing into distinct frequency components. The processing unit separates high-frequency and low-frequency components and applies different luminance adjustment strategies to each, simplifying the overall processing logic while achieving effective power reduction.
Solution Approach 2:
The patent implements parameter changes by modifying the drive signal parameters (luminance levels) based on the analyzed image characteristics. The processing unit changes luminance parameters selectively for different frequency components, enabling dynamic power management through parameter optimization rather than complex structural changes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves approximately 20% reduction in power consumption for still images and 30% for moving images without significantly affecting perceived image quality, as the human visual system's sensitivity is considered in the adjustment process.
Implementation Method 1
Electrons are injected through these electrodes 22 and 24, and excitation of holes is formed. Light 26, having a particular wavelength, is generated by energy from the formed excitation.
Data Source
AI summary
An image processing apparatus and a method to reduce power consumption of a self-luminous display. The image processing apparatus includes a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced; a scale factor setting unit to extract a high-frequency component of a current pixel in an input image and to set a scale factor according to the selected parameter and a size of the extracted high-frequency component; and a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication.