Capacitive Touch System Parallel IC Scanning for Large Panels
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Solution Overview
Problem
Conventional capacitive touch systems struggle to implement multi-finger touch detection on large scale touch panels while maintaining a good frame rate, as existing sensing techniques either fail to detect multiple fingers or significantly degrade the frame rate due to increased scanning time.
Innovation Solution
A capacitive touch system utilizing two or more integrated circuits (ICs) to scan a touch panel, where each IC scans a portion of the panel independently, with one IC coordinating the operation and computing the touch information, thereby reducing the overall scanning time and maintaining a high frame rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an AI projected capacitance touch IC is applied to a large scale touch panel to scan more traces, then the capability to detect multi-finger touch is improved, but the frame rate significantly decreases due to increased scanning time
Solution Approach 1:
The touch panel is divided into multiple regions, with each touch IC responsible for scanning a specific region. This segmentation allows parallel scanning of multiple regions simultaneously, maintaining high frame rates while enabling multi-finger detection across the entire large scale panel.
Solution Approach 2:
Multiple touch ICs are combined to work together on a single large scale touch panel. Each IC scans its assigned region independently, and their results are integrated to achieve comprehensive multi-finger touch detection across the full panel area.
2Area of stationary object
If the number of traces to be scanned is increased to cover a large scale touch panel, then the coverage area is improved, but the scanning time dramatically increases
Solution Approach 1:
The large scale touch panel is segmented into multiple smaller scanning zones, each handled by a dedicated touch IC. This division allows simultaneous scanning of multiple zones, dramatically reducing the total scanning time required to cover the entire large area.
Solution Approach 2:
The scanning architecture transitions from a single IC handling all traces sequentially to multiple ICs handling different trace sets in parallel. This dimensional expansion from one IC to N ICs enables proportional reduction in scanning time while maintaining full panel coverage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for effective multi-finger touch detection on large scale touch panels with improved frame rates, as the simultaneous scanning by multiple ICs reduces the time required to scan the entire panel, enhancing performance.
Implementation Method 1
capacitive touch system using two or more integrated circuits (ICs) to scan a touch panel... Each of the integrated circuits scans only a portion of the touch panel to retrieve a respective detected data... all the detected data are used for computation... to determine a touch information
Data Source
AI summary
A capacitive touch system uses two or more integrated circuits to simultaneously scan a touch panel in such a manner that each of the integrated circuits scans only a portion of the touch panel to retrieve a respective detected data by itself. All the detected data are used for computation by one of the integrated circuits or one other than the integrated circuits to determine a touch information. This approach enables axis intersect projected capacitance touch integrated circuits applicable to a large scale touch panel, without degrading the frame rate of a capacitive touch system.