Display Device Logo Compensator for Burn-in Prevention
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Solution Overview
Problem
Display devices face image quality deterioration and burn-in issues due to prolonged display of logos or static images, which cause pixel degradation and permanent image retention.
Innovation Solution
A display device and method that utilize a logo compensator to generate logo map data, extract logo area data, calculate brightness compensation, and determine whether to apply brightness adjustments based on overlap and threshold values to prevent pixel deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the same image (logo) is displayed on the display panel for an extended period of time, then the logo image is clearly visible and maintains its brightness, but the pixels deteriorate resulting in image retention or burn-in that reduces image quality
Solution Approach 1:
The patent implements periodic action by alternately displaying the logo image and blank images (or images with different luminance) at predetermined intervals. This periodic switching prevents continuous stress on the same pixels, thereby preventing burn-in while maintaining logo visibility during active display periods. The controller is configured to receive a logo image, determine a logo display area, and alternately display the logo and blank images in this area.
Solution Approach 2:
The patent applies preliminary action by proactively managing logo display timing and alternately displaying blank images before burn-in occurs. The controller pre-determines logo display areas and schedules alternate display of blank images or images with different luminance characteristics, preventing pixel deterioration before it happens rather than reacting after damage occurs.
2Reliability
If brightness compensation is applied to the logo area, then pixel deterioration is prevented, but image quality may deteriorate due to difference in brightness between logo image and background image
Solution Approach 1:
The patent applies local quality by performing brightness compensation only in the specific logo display area rather than uniformly across the entire display panel. The controller determines the precise logo display area and applies compensation measures (such as alternately displaying blank images or adjusting luminance) only to this localized region, maintaining overall image quality while protecting the logo area from burn-in.
Solution Approach 2:
The patent segments the display area into logo display areas and non-logo areas, applying different display strategies to each segment. The controller identifies and separates the logo region from the rest of the display, enabling independent control and brightness management for the logo area without affecting the overall image quality in other regions.
3Loss of information
If the logo image is displayed continuously, then the logo remains visible and recognizable, but the boundary between logo area and background becomes indistinct causing image quality deterioration
Solution Approach 1:
The patent uses periodic action to maintain clear boundaries by alternately displaying the logo image and blank images (or images with different luminance) in the logo display area. This periodic switching creates distinct visual separation between the logo and background, preventing boundary blurring while maintaining logo recognizability during active display periods.
Solution Approach 2:
The patent applies local quality by implementing boundary enhancement measures specifically in the logo display area. The controller identifies the precise boundaries of the logo region and applies localized display control, including alternate display of blank images near boundaries, to maintain sharp separation between logo and background areas.
Data Source
AI summary
The present disclosure provides a display device with a display panel and driver. The driver includes a logo compensator to generate a logo map data with respect to a logo area through which the logo image is displayed and compensates for a brightness of the logo area using the logo map data. The logo compensator includes an extractor, a logo calculator, a logo determination unit, and a brightness compensation block. The extractor extracts logo area data. The logo calculator calculates the logo map data with first data corresponding to a first image recognized as the logo image and second data corresponding to a second image recognized as a logo background image. The logo determination unit sets a boundary area and determining whether a first area corresponding to the first image overlaps the boundary area to output determination data. The brightness compensation block compensates for the brightness of the logo area.