Display Controller Thumbnail Analysis for Afterimage Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Digital TV services, particularly IPTV and smart TV, face issues with afterimages due to the material properties of liquid crystal and organic light emitting display panels, which deteriorate over time, especially during slide shows with similar images, affecting user immersion and image quality.
Innovation Solution
A display device with a controller that analyzes thumbnail images to determine if they are identical and switches between normal and deterioration prevention modes, reducing luminance or displaying a black screen to prevent afterimages and minimize computational burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If voltage or current is continuously supplied to display identical or similar photo images in a slide show, then the slide show can be executed infinitely repeatedly, but afterimage becomes severe and image quality deteriorates
Solution Approach 1:
The patent applies periodic action by alternately displaying the photo image and a different image (such as a black screen or other image) in a cyclic manner. This periodic switching prevents continuous exposure of the same image to the display panel, thereby reducing afterimage effects while maintaining indefinite slide show execution. The controller is configured to switch between the photo image and the other image based on detection of afterimage occurrence.
2Measurement precision
If full photo images are compared to detect identical images, then accurate detection can be achieved, but computational burden increases significantly
Solution Approach 1:
The patent applies segmentation by dividing the photo image into multiple thumbnail images before comparison. Instead of comparing the entire high-resolution photo image, the controller compares multiple lower-resolution thumbnail images representing different regions of the photo. This segmentation approach maintains detection accuracy while significantly reducing computational complexity and processing time.
Solution Approach 2:
The patent uses thumbnail images as simplified copies of the full photo images for comparison purposes. These thumbnail copies contain sufficient information to determine whether photo images are identical or similar, but require much less computational resources to process. The controller uses these copied representations to make detection decisions without needing to process the complete high-resolution images.
Data Source
AI summary
A display device includes a display and a controller. The controller may obtain whether at least two or more thumbnail images of the plurality of thumbnail images are identical, and control to display the plurality of photo images on the display by executing the slide show in a deterioration prevention mode from among a normal mode and the deterioration prevention mode when the at least two or more thumbnail images of the plurality of thumbnail images are identical.