Edge Enhancement Correction for Display Power Management
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Solution Overview
Problem
Self-luminous displays like organic EL displays face challenges in achieving high image quality and low power consumption simultaneously, as edge enhancement techniques increase power consumption and stopping these functions compromises image quality.
Innovation Solution
A display device with an extraction unit for edge components, an adder unit, a signal generation unit, and a correction unit that adjusts edge enhancement amounts in both plus and minus directions to minimize power consumption while maintaining image quality, using asymmetric enhancement to prioritize power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If edge enhancement is applied to improve image quality, then visibility and image quality are improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by performing edge enhancement only on specific regions (edge portions) of the display screen rather than the entire image. The correction unit identifies edge components and applies enhancement selectively to these regions, leaving non-edge areas unchanged. This localized approach maintains image quality improvement while reducing the overall power consumption increase compared to full-image enhancement.
Solution Approach 2:
The patent implements partial action by applying edge enhancement with controlled gain only to detected edge portions of the image. The correction unit calculates appropriate enhancement amounts based on edge detection results and applies them selectively. This partial enhancement approach achieves sufficient image quality improvement without the excessive power consumption that would result from enhancing the entire image.
2Illumination intensity
If edge enhancement amount is increased to improve visibility, then image quality improves, but power consumption increases excessively
Solution Approach 1:
The patent applies dynamics by dynamically adjusting the edge enhancement amount based on real-time edge detection results and image characteristics. The correction unit calculates enhancement gains adaptively for each edge portion, modifying the enhancement strength according to the specific image content and edge properties. This dynamic adjustment ensures optimal visibility improvement while preventing excessive power consumption that would occur with fixed high enhancement levels.
Solution Approach 2:
The patent implements parameter changes by varying the enhancement gain parameter based on edge component analysis. The correction unit modifies enhancement parameters (gain, threshold) according to the detected edge characteristics and image conditions. This parameter adaptation allows the system to achieve necessary visibility improvement while controlling power consumption by using lower enhancement parameters when sufficient enhancement is achieved.
Data Source
AI summary
A display device includes: an extraction unit extracting an edge component of a display data signal; an adder unit adding an edge component to the display data signal; a signal generation unit generating a control signal in accordance with the display data signal and an output signal of the adder unit; a correction unit carrying out correction processing on the edge component in accordance with the control signal and outputting the corrected edge component to the adder unit; and a display unit carrying out a display operation in accordance with the output signal of the adder unit.