Selective Scan Area Update for Touch-Driven Display Refresh
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Solution Overview
Problem
Existing reflective display devices face challenges in maintaining display quality as they integrate touch functions, leading to delays in image updates when a user interacts with specific areas of the screen.
Innovation Solution
A display device comprising a display panel with scan lines classified into scan areas, where a touch panel receives touch signals and adjusts the scanning method to only update the corresponding scan areas, allowing for instant image updates without delaying the entire screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel scans all scan areas sequentially to update the entire screen, then the display quality is maintained, but image update delays occur when a user interacts with specific areas
Solution Approach 1:
The display panel divides the scan areas into multiple groups (first scan areas and second scan areas) and can selectively scan only the relevant group based on touch input. This segmentation allows the system to update only the necessary portion of the display, reducing update delay while maintaining overall display quality.
Solution Approach 2:
Instead of scanning all scan areas every frame period, the system performs partial scanning by updating only the scan areas corresponding to touch input locations. This partial action reduces the time loss without compromising the display quality of the relevant areas.
2Loss of time
If the display panel updates only the touched scan areas in response to touch input, then image update delay is reduced, but the scanning complexity increases
Solution Approach 1:
The scanning mechanism transitions from a static full-screen update approach to a dynamic selective update approach. The display control circuit adjusts the scanning behavior in real-time based on touch input, dynamically determining which scan areas need updating and adjusting the scan sequence accordingly.
Solution Approach 2:
The system uses touch input as feedback to determine the scanning strategy. The touch panel detects user interaction and provides feedback to the display control circuit, which then adjusts the scanning sequence to prioritize the touched areas, creating a closed-loop control system that adapts to user needs.
3Device complexity
If the display panel uses traditional sequential scanning for all areas, then the scanning control is simple, but the display quality deteriorates during touch interaction
Solution Approach 1:
By segmenting the scan areas into first and second groups with different scanning priorities, the system maintains relatively simple scanning control logic while improving display quality during touch interaction. The segmentation allows differential treatment of scan areas based on touch input without requiring completely complex control mechanisms.
Data Source
AI summary
A display device, comprising a display panel and a touch panel. The display panel comprises a plurality of scan lines. The plurality of scan lines are respectively classified into a plurality of scan areas, and the display panel is configured to sequentially scan the plurality of scan areas through the plurality of scanning lines. The touch panel is electrically connected to the display panel, and is configured to receive a touch signal. During a first frame period, when a position of the touch signal corresponds to one of plurality of the scan areas, the display panel is configured to start scanning the plurality of scan areas from the one of the plurality of the scan areas to display an image of the plurality of scan areas.