Electrophoresis Display Driving Method for Ghost Image Elimination
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Solution Overview
Problem
Electrophoresis display apparatuses waste power when updating display contents from one image frame to another, especially when the frames have minor content differences, due to the need for an all-black or all-white image frame to eliminate image persistence.
Innovation Solution
A driving method for an electrophoresis display apparatus that determines content differences between overlapping areas of current and next image frames and selectively displays a first-color content (white or black) only in areas with differences to update the display, reducing unnecessary power consumption by targeting specific areas for ghost image elimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an all-black or all-white image frame is displayed to eliminate image persistence, then image persistence is eliminated, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating treatment between different display areas. Instead of uniformly displaying all-black or all-white frames across the entire display, the system identifies specific areas with content changes and applies ghost image elimination only to those localized regions. This is achieved by comparing current frame data with previous frame data to determine which areas require updating, thereby eliminating image persistence harmfully affected areas while avoiding unnecessary power consumption in stable areas.
Solution Approach 2:
The patent segments the display area into multiple regions based on content change detection. By dividing the display into areas with content changes and areas without changes, the system can selectively apply ghost image elimination techniques only where needed. This segmentation allows the display to maintain bi-stable characteristics in unchanged areas (saving power) while actively updating only the necessary segments to eliminate image persistence.
2Stability of the object's composition
If an all-black or all-white image frame is displayed between current and next image frames, then transition between frames is achieved, but power is wasted when frames have minor content differences
Solution Approach 1:
The patent applies partial action by performing ghost image elimination only on portions of the display where content changes occur, rather than applying the operation to the entire display area. The system identifies specific regions with content differences between frames and limits the active update process to those regions only. This partial application of the elimination technique maintains display stability in unchanged areas while avoiding excessive power consumption that would result from processing the entire display.
Solution Approach 2:
The patent changes the operational parameters of the display system by switching between bi-stable mode (for stable areas) and active update mode (for changing areas). By dynamically adjusting the display mode based on content change detection, the system optimizes power consumption while maintaining image quality. The parameter change involves controlling the electrophoresis display to remain bi-stable in unchanged regions while actively updating only the necessary regions with content changes.
Data Source
AI summary
A driving method of a display panel includes the following steps: driving the display panel to display a first image frame and providing display data of a second image frame, and each of the first and the second image frames has a first area and a second area for respectively displaying two different display contents, the positions of the two corresponding first areas overlap, and the positions of the two corresponding second areas overlap; determining whether display content differences exist between the two corresponding first areas, and determining whether display content differences exist between the two corresponding second areas, and driving the area where display content differences exist in the two areas of the first image frame to display a first-color display content when display content differences exist between the two corresponding first areas or the two corresponding second areas. Furthermore, a corresponding electrophoresis display apparatus is also provided.