Proximity-Assisted Stylus Pairing for Position Detection
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Solution Overview
Problem
Existing position detecting systems face challenges in accurately pairing a position indicator with a position detecting apparatus, especially in environments where multiple indicators are close together, leading to unintended connections and complex manual identification processes.
Innovation Solution
A method involving the sharing of predetermined information between a position indicator and a position detecting apparatus when they are proximate, using a first communication device for longer-range communication to establish a pairing connection based on shared proximity information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pairing request transmission intensity is used to automatically pair position indicators with position detecting apparatus, then pairing operation is simplified, but pairing accuracy deteriorates when multiple indicators are close together
Solution Approach 1:
The patent introduces a display unit as an intermediary between the position detecting apparatus and position indicators. The display unit visually presents pairing requests from multiple position indicators, allowing the user to see which indicator is requesting pairing. This mediator resolves the contradiction by maintaining automatic pairing operation while improving pairing accuracy through visual confirmation, preventing wrong pairing when multiple indicators are nearby.
2Measurement precision
If manual specification of pairing target is implemented on position detecting apparatus, then pairing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent enables the position detecting apparatus to automatically present pairing requests from multiple position indicators through its display unit, and the user can simply select the desired pairing target from the displayed information. This self-service approach improves pairing accuracy without significantly increasing device complexity, as the system automatically handles the presentation and selection process rather than requiring complex manual configuration protocols.
3Measurement precision
If display unit is added to position detecting apparatus for pairing selection, then pairing accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent utilizes the display unit of the position detecting apparatus for multiple purposes: displaying pairing requests from position indicators, showing writing pressure information, and presenting other operational data. By making the display unit multi-functional, the patent improves pairing accuracy without proportionally increasing manufacturing cost, as the display capability is already present in the apparatus for other functions and is being leveraged for pairing operations.
Data Source
AI summary
A pairing method between a stylus and a position detecting apparatus that detects a position pointed to by the stylus includes: sharing, by the position detecting apparatus, a sensor identifier (ID) that is included in an uplink signal transmitted to the stylus while the stylus and the position detecting apparatus are proximate to each other at or within a predetermined distance, the sensor ID uniquely identifying the position detecting apparatus; and determining, by the position detecting apparatus using the sensor ID, whether information is transmitted from the stylus, the information being transmitted via a first wireless communication having a range that is longer than the predetermined distance.