Touch Stylus Uplink Reception with Feedback Channel Control
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Solution Overview
Problem
Existing styluses experience issues such as ink discharge failure, writing disconnection, and latency due to electrode interference during use on electronic devices.
Innovation Solution
A control method for a stylus with multiple electrodes and a control module that dynamically switches receiving channels based on signal decoding status to mitigate interference, ensuring successful signal reception and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second electrode is used to receive uplink signals continuously, then signal reception capability is improved, but electrode interference causes writing disconnection and latency
Solution Approach 1:
The patent implements periodic switching between the first and second electrodes for receiving uplink signals. The control module alternates the receiving channels in a periodic manner, allowing the second electrode to rest and recover from interference while still maintaining signal reception capability through the first electrode during switching periods.
Solution Approach 2:
The patent divides the signal reception function into two separate electrodes (first electrode and second electrode) with separate receiving channels. This segmentation allows independent control and switching of each electrode's receiving state, enabling the system to avoid interference by switching to the first electrode when the second electrode experiences interference.
2Reliability
If both receiving channels are always on, then signal decoding success rate is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic control of the receiving channels based on decoding status. The control module monitors whether uplink signals are successfully decoded and dynamically switches between keeping both channels on or turning off the second channel, adapting the power consumption level to the actual signal reception needs.
Solution Approach 2:
The patent uses feedback from the decoding status to control the receiving channel configuration. When decoding is successful, the system feedbacks to turn off the second receiving channel to save power; when decoding fails, the system feedbacks to keep both channels on to improve decoding success rate.
3Object-affected harmful factors
If the first electrode works alone continuously, then electrode interference is avoided, but signal reception reliability decreases
Solution Approach 1:
The patent implements periodic switching between the first and second electrodes. The second electrode is activated periodically to receive uplink signals when interference conditions allow, while the first electrode serves as the primary receiving electrode. This periodic activation of the second electrode improves signal reception reliability without causing continuous interference.
Data Source
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AI summary
Embodiments of this application provide a control method, a stylus, and a touch system, and relate to the field of electronic technologies. In this application, when the stylus is in a working mode, based on status information of an Nth frame of uplink signal, a target receiving channel is controlled to be turned on in a preset manner, to receive an (N+1)th frame of uplink signal sent by an electronic device based on the target receiving channel, where the target receiving channel includes a first receiving channel formed between a first electrode and a control module, and/or a second receiving channel formed between a second electrode and the control module. Therefore, when an uplink signal received by the second electrode is interfered with, an uplink signal can also be normally received to be successfully decoded within a periodicity in which the first electrode works alone, to alleviate problems caused by interference, such as the stylus being unable to discharge ink, writing disconnection, and latency, thereby greatly improving writing experience.