Touch Display Device Dynamic Pen Protocol Switching
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Solution Overview
Problem
Current touch display devices are limited in their ability to sense and interwork with multiple pens operating on different protocols, failing to accommodate various pen usage requirements and protocols, which restricts their versatility and functionality.
Innovation Solution
A touch display device and circuit that dynamically adjust their communication periods and signal protocols to accommodate different pens, allowing for sensing and interworking with multiple pens by modifying the type and mode registers and setting different communication periods for each pen, enabling seamless interaction with pens of varying manufacturers and protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch display device uses a fixed pen sensing function for a specific pen protocol, then the device can reliably sense pens operating under that specific protocol, but the device cannot accommodate various types of pens with different protocols and manufacturers
Solution Approach 1:
The patent implements dynamic pen protocol switching by allowing the touch circuit to change communication protocols based on the detected pen type. The system transitions from a fixed protocol to a dynamic protocol selection mechanism, where the controller adjusts the pen sensing function in real-time to match the connected pen's protocol, thereby achieving universal compatibility without hardware changes
Solution Approach 2:
The patent changes the communication protocol parameter dynamically to accommodate different pen types. By modifying the protocol parameter (e.g., from first pen protocol to second pen protocol) based on pen identification, the system adapts to various pen manufacturers and models while maintaining a unified hardware architecture
2Adaptability or versatility
If the touch display device supports multiple pen protocols by changing protocols between touch frame times, then the device can sense two or more pens with different protocols, but the control complexity and timing management become more challenging
Solution Approach 1:
The patent employs periodic protocol switching within touch frame times to support multiple pens. By allocating specific touch frame times for different protocols and using periodic beacon signals for pen detection, the system systematically manages multi-protocol communication in a time-divided manner, reducing control chaos while maintaining multi-pen compatibility
3Ease of operation
If the touch circuit dynamically adjusts communication periods and protocols for different pens, then the device achieves seamless interworking with various pens, but the sensing time management and communication scheduling become more complex
Solution Approach 1:
The patent segments the touch frame time into multiple communication periods, with specific touch frame times allocated for different pen protocols. By dividing the sensing time into discrete segments and assigning protocols to specific segments, the system simplifies the management of multi-protocol communication while achieving seamless pen interworking
Data Source
AI summary
Embodiments of the present disclosure relate to a touch display device, a touch circuit, and a pen sensing method, allows various pen protocols to be adaptively set, thereby sensing various types of pens or sensing a pen by using various pen protocols.