Touch Driving Device Dynamic Circuit Switching
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Solution Overview
Problem
Current touch driving devices face challenges in efficiently processing touch sensing signals from multiple touch panels, leading to increased power consumption and noise interference, particularly in large-area touch display devices.
Innovation Solution
A touch sensing device with a touch sensing circuit that receives signals from multiple touch panels and utilizes a plurality of driving device pads, where the touch sensing circuit connected to the third driving device pad is turned off during signal reception from the first and second touch panels, optimizing data transmission and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch sensing circuit continuously monitors all driving device pads to detect touch inputs from multiple touch panels, then the touch detection capability is improved, but the power consumption increases
Solution Approach 1:
The touch sensing circuit dynamically adjusts its operational state by selectively turning on or off specific sensing circuits based on which touch panel is currently being driven. This dynamic switching allows the system to maintain touch detection capability while minimizing power consumption by activating only the necessary sensing circuits at any given time.
Solution Approach 2:
The system employs periodic action by alternating between driving the first touch panel and the second touch panel in separate time periods. During each period, only the corresponding sensing circuit is activated, creating a time-division multiplexed operation that reduces overall power consumption while maintaining continuous touch detection coverage.
2Speed
If the touch sensing circuit processes signals from all touch panels simultaneously, then the touch response speed is improved, but the noise interference increases
Solution Approach 1:
The touch sensing function is segmented into separate sensing circuits, with each sensing circuit dedicated to a specific touch panel. This segmentation allows signals from different touch panels to be processed independently, preventing noise interference between channels while maintaining fast response times for each individual panel.
Solution Approach 2:
The system uses time-division multiplexing to process signals from different touch panels in alternating periods rather than simultaneously. This periodic action eliminates signal interference and noise between panels while maintaining fast touch response by ensuring that each panel receives dedicated processing attention in its assigned time slot.
Data Source
AI summary
Disclosed herein a touch display driving device for driving a touch panel including first and second touch panels, which includes a plurality of touch sensing circuits configured to receive a touch sensing signal from the touch panel, and a plurality of driving device pads connected to the touch panel and selectively connected to the touch sensing circuit, wherein the plurality of driving device pads are divided into first, second, and third driving device pads, and when the touch sensing signal is received from the first touch panel through the first and second driving device pads, the touch sensing circuit connected to the third driving device pad is turned off.