Driving Controller Logo Map Compensation for Display Afterimages
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Solution Overview
Problem
Display panels often experience afterimages when logos are displayed at fixed positions for extended periods, leading to a deterioration in display quality, particularly in organic light emitting display panels.
Innovation Solution
A driving controller is developed with a logo detector that extracts a logo map by analyzing input image data, compensating logo area data using histogram extraction and binarization techniques to distinguish logo and background areas, and applying blurring and quantization to reduce afterimage formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a logo is displayed at a fixed position for a long time, then the logo can be continuously displayed, but an afterimage is generated leading to deterioration in display quality
Solution Approach 1:
The patent applies preliminary action by detecting the logo area in advance using histogram extraction and binarization, generating a logo map before the afterimage problem occurs. The driving controller proactively compensates the logo area data by blending it with adjacent area data, preventing afterimage formation before it deteriorates display quality.
Solution Approach 2:
The patent applies local quality by treating the logo area differently from the non-logo area. The driving controller identifies specific logo pixels through the logo map and applies selective compensation only to those pixels by blending with adjacent area data, rather than processing the entire image uniformly. This localized approach prevents afterimages in logo areas while maintaining normal display performance in other areas.
2Measurement precision
If histogram extraction and binarization are used to detect logo areas, then logo map accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or hardware-based logo detection methods with software-based image processing algorithms. By using histogram extraction and binarization algorithms, the system achieves accurate logo detection through computational methods rather than physical or mechanical means, reducing hardware complexity while maintaining detection precision.
Solution Approach 2:
The patent creates a simplified representation (logo map) that copies only the essential information about logo areas from the original image data. Instead of processing the entire complex image data, the system generates a binary logo map that marks logo pixels, which is then used for selective compensation. This copying approach reduces processing complexity while preserving the necessary information for afterimage prevention.
Data Source
AI summary
A driving controller includes a logo detector. The logo detector includes a histogram extractor which receives input image data and extracts a first histogram from logo area data of the input image data, a first histogram regenerator electrically connected to the histogram extractor and configured to receive the first histogram from the histogram extractor to generate a second histogram based on the first histogram and a logo map determiner electrically connected to the histogram extractor and the first histogram regenerator, and configure to select one of the first histogram and the second histogram to generate a first logo map. The driving controller is configured to compensate the logo area data of the input image data using the first logo map.