Image Shift Controller for Dynamic Afterimage Correction
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Solution Overview
Problem
Conventional pixel shift technologies in display devices fail to effectively correct afterimages due to the inability to change the starting position of an image without using additional memory, leading to imperfect afterimage correction when the display is turned off and on again.
Innovation Solution
An image shift controller that generates image position information using sample data, determining movement direction and amount without requiring additional memory, utilizing a combination of flip flops and a selecting unit to select output signals and generate image position information, which is then used to correct the image position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pixel shift technology is used to move images in a uniform period, then pixel deterioration is reduced, but afterimage correction is imperfect because the image moves in the same direction repeatedly
Solution Approach 1:
The patent applies dynamics by making the image movement direction variable rather than fixed. The controller dynamically determines movement directions based on previous movement history, switching between multiple directions (e.g., left, right, up, down) to prevent repetitive unidirectional movement. This dynamic adaptation resolves the contradiction by maintaining pixel deterioration reduction while improving afterimage correction through directional variety.
Solution Approach 2:
The patent implements periodic action through systematic rotation of movement directions in a cyclic manner. The controller follows a predetermined sequence of directions (e.g., left→right→up→down→left...) to create periodic variation in image movement. This periodic variation ensures that pixels are not continuously stressed in the same direction, thereby improving afterimage correction while maintaining the benefits of regular pixel shifting.
2Reliability
If additional memory is added to store image position information, then starting position can be changed effectively, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the system to generate and store movement direction information internally without external memory intervention. The controller uses its own processing capabilities to determine movement directions based on stored movement history, and the display panel itself maintains the necessary state information. This eliminates the need for additional memory devices and interfaces, resolving the contradiction by achieving starting position change capability through self-service mechanisms.
Solution Approach 2:
The patent extracts the essential function of memory storage by removing the actual memory component and replacing it with a state maintenance mechanism within the display panel or controller. Instead of using external memory to store image position information, the system extracts and utilizes only the necessary direction information from the image data itself, processing it through the controller's internal logic to determine movement directions without requiring additional storage hardware.
Data Source
AI summary
An image shift control method including generating image position information by using sample data of first image data; and determining a movement direction and a movement amount of an image by using the image position information.