Touch Device Stylus Detection Protocol Sequencing
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Solution Overview
Problem
Existing detection methods for active styluses of different protocols on electronic devices face inefficiencies and user experience issues due to difficulties in accurately detecting and communicating with styluses conforming to various protocols, leading to latency and incorrect decoding of uplink signals.
Innovation Solution
A detection method and driving circuit that transmit uplink signals conforming to different protocols in a chronological sequence based on whether the stylus has entered or left the detection range, adjusting the repeat pattern to prioritize the protocol of the recently detected stylus, ensuring timely and accurate communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch device transmits uplink signals conforming to multiple different protocols in a fixed sequence, then all active styluses of different protocols can be detected, but detection latency increases and user experience deteriorates when a stylus enters or leaves the detection range
Solution Approach 1:
The patent applies dynamics by making the signal transmission sequence adjustable rather than fixed. The processing circuit dynamically changes the chronological sequence of uplink signals based on detection events (when a stylus enters or leaves the detection range). This allows the system to adapt the protocol transmission order in real-time, prioritizing protocols of active styluses and reducing detection latency while maintaining accuracy for multiple protocol types.
2Adaptability or versatility
If the touch device uses a single protocol for uplink signal transmission, then the system complexity is reduced, but compatibility with active styluses of different protocols is lost
Solution Approach 1:
The patent implements universality by enabling the touch device to transmit uplink signals conforming to multiple different protocols (first protocol, second protocol, etc.). The processing circuit is configured to select and transmit appropriate protocols based on which active styluses are detected, making the system compatible with various stylus types while managing complexity through intelligent protocol selection rather than simultaneous transmission of all protocols.
3Ease of operation
If the touch device prioritizes detection of styluses that have just entered the detection range, then user experience is improved, but styluses that have been continuously present may experience interruptions or protocol conflicts
Solution Approach 1:
The patent applies feedback by using detection results (whether a stylus has entered or left the detection range) to adjust the signal transmission sequence. The processing circuit receives feedback about stylus presence changes and dynamically reorders protocol transmissions accordingly. This feedback mechanism allows the system to prioritize newly entered styluses for quick detection while maintaining stable communication with continuously present styluses through appropriate protocol selection.
Data Source
AI summary
A detection method for a touch device includes transmitting a first uplink signal conforming to a first protocol of a first active stylus and transmitting a second uplink signal conforming to a second protocol of a second active stylus. A chronological sequence of the first uplink signal and the second uplink signal is based at least in part on whether the first active stylus or the second active stylus has just left a detection range of the touch device.