Active Stylus Synchronization with Adaptive Timing Parameters
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Solution Overview
Problem
Existing stylus technologies face challenges in synchronizing the transmission timing of an active stylus with touch devices, leading to inefficiencies and potential interference with display operations.
Innovation Solution
A synchronization method and controller for an active stylus that transmit downlink signals according to specific timing parameters configured for each touch device, ensuring accurate and timely reception of signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the active stylus uses a fixed transmission timing configuration, then the device complexity is reduced, but the synchronization precision with different touch devices deteriorates
Solution Approach 1:
The patent applies dynamics by making the transmission timing configuration adjustable and adaptive rather than fixed. The active stylus dynamically configures its downlink signal transmission timing based on the specific touch device it is interacting with, allowing synchronization parameters to change according to different devices while maintaining operational simplicity through automated adaptation.
Solution Approach 2:
The patent implements parameter changes by modifying the transmission timing parameters of the downlink signal based on the target touch device. Different timing parameters are applied when the stylus moves between different touch devices, enabling precise synchronization for each device without requiring manual reconfiguration or increasing overall system complexity.
2Reliability
If the active stylus transmits downlink signals continuously, then the data transmission reliability is improved, but the interference with display operations increases
Solution Approach 1:
The patent applies periodic action by transmitting downlink signals at specific intervals rather than continuously. The transmission occurs periodically at configured timing parameters that align with touch detection cycles, ensuring reliable data transmission while avoiding constant interference with display refresh operations and reducing overall interference exposure.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the transmission timing parameters before actual data transmission begins. The stylus establishes synchronized timing with the touch device in advance, allowing subsequent transmissions to occur at predetermined moments that minimize interference with display operations while maintaining transmission reliability.
3Adaptability or versatility
If the active stylus adjusts transmission timing for each touch device, then the adaptability is improved, but the operation complexity increases
Solution Approach 1:
The patent applies self-service by enabling the active stylus to automatically detect and adapt to different touch devices without user intervention. The stylus autonomously configures its transmission timing parameters based on the identified touch device, providing high adaptability across different devices while maintaining ease of operation through automated self-configuration rather than manual setup.
Data Source
AI summary
A synchronization method for an active stylus includes transmitting a first downlink signal according to at least one first timing parameter, configured for a first touch device, after the active stylus moves to the first touch device, and transmitting a second downlink signal according to at least one second timing parameter, configured for a second touch device, after the active stylus moves to the second touch device. With the synchronization method and its control circuit, the active stylus can communicate to various touch devices accurately or communicate to different touch devices alternately, even though the active stylus may move from one touch device to another.