Touch Panel Two-Point Distance Detection Using Pressing Force Correction

The detection process is segmented into two independent measurement stages: first measuring resistance values between opposing terminals to detect two-point touch, then measuring pressing forces at each touch point. This segmentation allows the system to separately account for distance and pressing force effects, improving distance detection accuracy by eliminating pressing force interference from the distance calculation.

Pressing force measurement serves as an intermediary parameter that mediates between the raw resistance value and the final distance calculation. By introducing pressing force as an intermediate variable, the system can correct the resistance-based distance measurement to compensate for pressing force effects, thereby achieving accurate distance detection.

The detection system is divided into separate functional modules: a resistance measurement unit for detecting two-point touch, a pressing force measurement unit for measuring force at each point, and a distance calculation unit that integrates both measurements. This modular segmentation allows the system to maintain relatively simple individual components while achieving high overall measurement precision through their coordinated operation.

The resistance measurement between opposing terminals serves multiple functions: it detects whether two points are touched and provides baseline information for distance calculation. By making this single measurement serve multiple purposes, the system avoids adding redundant dedicated sensors, thereby maintaining device simplicity while achieving accurate distance detection when combined with pressing force data.