Touch Display Progressive Scanning Signal Detection
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Solution Overview
Problem
Existing touch display devices often fail to effectively detect touch signals due to limited scanning time between frame refreshes, leading to compromised user experience.
Innovation Solution
A method for driving touch display devices that involves progressive scanning and simultaneous input of touch signals to unscanned display regions, allowing for increased scanning time and reduced signal interference by alternating and sequential input of touch signals during the display cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the touch display device only scans and detects touch signals in the time slot between frame refreshes, then the display refresh rate is maintained, but the touch signal scanning time is insufficient leading to missed touch inputs
Solution Approach 1:
The display screen is divided into multiple display regions (first, second, third, fourth regions), and the touch signal scanning is performed in parallel across different regions during the progressive scanning of other regions. This segmentation allows simultaneous display refresh and touch scanning without compromising either function.
Solution Approach 2:
The patent implements continuous touch signal scanning across all display regions throughout the entire display cycle, rather than limiting scanning to idle time slots. By continuously inputting touch signals to unscanned regions during progressive scanning, the system maximizes touch detection coverage without reducing display refresh rate.
2Reliability
If the touch signal is scanned only during idle time slots between frames, then the display system remains simple, but the touch detection reliability is compromised
Solution Approach 1:
The patent merges the display scanning function with the touch signal scanning function into a unified progressive scanning process. Both functions are combined in a single coordinated operation, allowing the system to maintain relative simplicity while achieving reliable touch detection through parallel processing in different display regions.
3Speed
If the touch signal scanning is performed sequentially after display refresh, then the system structure remains simple, but the response time to user touch input increases
Solution Approach 1:
The touch signal is preliminarily input to display regions before they are scanned for display output. By pre-inputting the touch signal to unscanned regions during the progressive scanning process, the system ensures that touch data is ready and available immediately when needed, reducing response time without requiring complex post-processing.
Data Source
AI summary
The present invention relates to the field of display technology, and provides a touch display device and its driving method, so as to increase the time spent for scanning a touch signal. In the method for driving the touch display device, the touch display device comprises n display regions, each of which corresponding to a plurality of rows of pixels, and n is an integer greater than or equal to 2. The method comprises the step of: during a progressive scanning procedure, scanning one of the n display regions and outputting a display signal to the scanned display region, and at the same time inputting a touch signal to the remaining n−1 display regions that are not scanned.