Stylus Attachment Detection With Multi-Step Position Verification

The detection process is divided into multiple independent steps: first detecting whether an object is attached to the first area, then detecting whether the attaching object is the stylus, and finally detecting whether the attaching location is accurate. Each step uses different detection methods and provides specific detection results, allowing the system to achieve high accuracy without requiring all detection mechanisms to operate simultaneously, thus managing complexity effectively.

The patent introduces intermediate detection steps between the initial magnetic field detection and final stylus confirmation. Specifically, it uses private message exchange and connection diagnosis messages as intermediary verification mechanisms. These intermediaries provide additional layers of confirmation without directly complicating the core magnetic attachment detection, thereby improving accuracy while maintaining operational simplicity.

The system performs detection steps selectively rather than always executing all possible verification procedures. The private message exchange and connection diagnosis are triggered based on initial detection results, meaning that not all processing resources are consumed for every attachment event. This partial execution approach maintains high detection accuracy while avoiding unnecessary processor resource consumption during routine operations.

The patent implements preliminary detection of attachment presence before proceeding to more resource-intensive verification steps. The magnetic field detection serves as a preliminary filter that determines whether subsequent private message exchange and connection diagnosis procedures are necessary. This preliminary action prevents wasteful consumption of processor resources when no stylus is actually attached, while still enabling accurate detection when attachment occurs.

The detection system employs periodic verification through private message exchange and connection diagnosis messages. Rather than relying on a single magnetic field measurement, the system periodically sends verification messages and processes responses to confirm stylus attachment and location. This periodic action pattern maintains fast initial detection while adding reliability through scheduled verification steps that occur at appropriate intervals.

The patent implements feedback mechanisms where the terminal device sends private messages to the attaching object and monitors for private reply messages within a preset time period. The stylus provides feedback through its response to these messages, allowing the system to verify attachment authenticity. This feedback loop significantly improves detection reliability by confirming that the attached object is indeed a functional stylus rather than just any magnetic object, while the preset time limits keep the feedback process efficient.