Touch Display Electrode Grouping for Faster Touch Reporting
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Solution Overview
Problem
Conventional touch display screens with low report rates experience missed reports during quick clicks and irregular performance in spiral tests, affecting user experience.
Innovation Solution
A touch display device with interlaced sensing and driving electrodes organized into N large groups, where driving electrodes within the same group receive signals with the same characteristic and those in different groups receive signals with different characteristics, allowing for synchronous scanning that reduces scanning time to 1/N of the original, thereby improving the touch report rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sequential scanning method is used, then device complexity is low, but touch report rate is low and scanning time is long
Solution Approach 1:
The patent divides the driving electrodes into N large groups, where each large group contains multiple small groups. This segmentation allows simultaneous scanning of multiple small groups within each large group, thereby reducing overall scanning time and improving touch report rate while maintaining manageable system complexity through hierarchical organization.
Solution Approach 2:
The patent merges the scanning operations of multiple small groups within the same large group to occur simultaneously. By combining these parallel scanning operations and using frequency domain separation, the system achieves faster reporting without proportionally increasing hardware complexity.
2Loss of time
If multiple driving electrodes are scanned simultaneously, then scanning time is reduced, but signal separation difficulty increases
Solution Approach 1:
The patent assigns different frequency characteristics to driving signals of different large groups. By changing the frequency parameter and using interlaced frequency allocation, the system enables simultaneous scanning of multiple electrode groups while maintaining the ability to separate their sensing signals through frequency domain filtering.
Solution Approach 2:
The patent introduces frequency domain separation as an intermediary mechanism to resolve the conflict between simultaneous scanning and signal separation. The frequency characteristics act as a mediator that allows multiple scanning operations to coexist without interfering with each other's detectability.
Data Source
AI summary
A touch display device and a touch driving method are provided. The touch display device comprises a plurality of interlaced sensing electrodes and driving electrodes in N large groups. Corresponding driving signals synchronously scan the driving electrodes of each large group. Scanning time of the driving electrodes can be reduced to an original 1/N, which can improve a touch report rate.