Digitizer Panel Power Control via Electronic Pen State Detection
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Solution Overview
Problem
Electronic devices with digitizer panels consume unnecessary current when the electronic stylus is not in use, as the digitizer panel remains activated even when the stylus is detached, leading to reduced usage time and increased power consumption.
Innovation Solution
An electronic device with a communication circuit, sensor circuit, and processor that detects the detachment of the electronic pen and deactivates the digitizer panel based on the pen's state, reducing unnecessary current consumption by determining whether the stylus is in use through various detected characteristics such as detachment, activation/deactivation status, distance, and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the digitizer panel is maintained in an activated state to ensure responsiveness when the electronic pen is detached, then the user experience is improved, but current consumption increases unnecessarily
Solution Approach 1:
The digitizer panel's activation state is made dynamic rather than static. The system automatically transitions between activated and deactivated states based on real-time detection of electronic pen status through sensor circuits and communication protocols, ensuring the panel is only active when the pen is actually in use or mounted
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring the electronic pen's state through sensor circuits and communication circuits. This feedback loop allows the processor to determine whether the pen is mounted, detached, active, or inactive, and accordingly control the digitizer panel's activation state to match the actual usage condition
2Ease of operation
If the digitizer panel remains activated during periods when the electronic pen is not in use, then the system is ready for immediate input, but usage time of the electronic device is reduced
Solution Approach 1:
Instead of continuous activation, the system employs periodic activation based on detected events. The digitizer panel is activated periodically when the electronic pen is detected as mounted or when communication indicates the pen is in use, and deactivated during periods when the pen is detached or inactive, creating an on-demand activation pattern that extends usage time
3Loss of energy
If the system continuously monitors the electronic pen state to optimize digitizer panel activation, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The electronic pen itself provides state information to the electronic device through communication circuits. The pen can autonomously indicate its own status (mounted/detached, active/inactive), reducing the burden on the electronic device's monitoring system and simplifying the overall architecture while still achieving optimized power consumption
Data Source
AI summary
An electronic device and method are disclosed. The electronic device includes a communication circuit, a sensor circuit, a digitizer panel, and a processor. The processor implements the method, including: detecting whether an electronic pen is detached from the electronic device via the sensor circuit, activating the digitizer panel based on detecting detachment of the electronic pen from the electronic device, identifying a state of the electronic pen through a communication linkage with the electronic pen via the communication circuit, and deactivate the activated digitizer panel based on the identified state of the electronic pen.