Electronic Pen Input Filtering for Hover Motion Interference
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Solution Overview
Problem
Recent electronic pens have evolved to provide input functions through short-range wireless communication technologies like Bluetooth or BLE, but there is a need for improved control methods to manage inputs and motion information effectively.
Innovation Solution
The electronic device includes a wireless communication circuit and a processor that counts approach indicators with motion sensor values, discarding excess values and generating approach indicators for external devices when sensor signals exceed a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If motion sensor values are continuously received through wireless communication, then data input functionality is enhanced, but data accuracy deteriorates due to signal interference when electronic pen hovers near display
Solution Approach 1:
The patent introduces an electromagnetic sensor as an intermediary detection device between the motion sensor and the processing system. This sensor detects the hovering state of the electronic pen near the display and generates signals that mediate the interaction between the pen and device, allowing the system to distinguish between actual motion inputs and hovering states that cause interference.
Solution Approach 2:
The system implements feedback by continuously monitoring electromagnetic sensor signals and using this information to adjust the processing of motion sensor values. When the electromagnetic sensor detects that the pen is hovering near the display, the system responds by adjusting or discarding corresponding motion sensor values, creating a closed-loop control mechanism that maintains data accuracy.
2Productivity
If all received motion sensor values are processed, then data input efficiency is improved, but data reliability deteriorates due to inclusion of inaccurate values during hovering
Solution Approach 1:
The patent applies local quality by treating different sets of sensor data differently based on the detected state. Motion sensor values are processed with high priority when the electromagnetic sensor indicates normal operation, but are discarded or adjusted when hovering is detected. This localized differentiation of data processing quality ensures reliability without sacrificing overall efficiency.
Solution Approach 2:
The system selectively discards motion sensor values that are determined to be inaccurate based on electromagnetic sensor feedback. By discarding only the problematic data points during hovering states while processing valid motion data normally, the system maintains high data reliability without unnecessary loss of input efficiency.
3Measurement precision
If electromagnetic sensor is added to detect hovering state, then input control accuracy is improved, but device complexity increases
Solution Approach 1:
The electromagnetic sensor serves multiple functions: it detects the hovering state of the electronic pen, generates signals for processing, and enables the system to distinguish between different input modes. This multi-functionality justifies the addition of the sensor by providing comprehensive control accuracy improvement through a single component rather than multiple specialized devices.
Data Source
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AI summary
An electronic device according to various embodiments may include a display, a wireless communication circuit and at least one processor operatively coupled with the display and the wireless communication circuit, and the at least one processor may be configured to receive motion sensor values from an external electronic device through the wireless communication circuit, count the number of approach indicators received together with the motion sensor values, and discard the received motion sensor values when the number exceeds a threshold value.