Pen Vibration Control for Tip-Impact Suppression
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Solution Overview
Problem
Existing pens with built-in vibration devices experience unwanted vibrations due to physical impacts when the pen tip contacts a panel surface, causing discomfort to the user.
Innovation Solution
A pen with a vibration device and a processing unit that suppresses the movement of the vibrator during non-use periods by using a short-range wireless communication unit to apply a small amplitude electric signal, preventing unwanted vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a vibration device is built into the pen to provide haptic feedback during pen input, then the user experiences tactile sensation when using the pen on a panel surface, but the vibration device may vibrate due to physical impact when the pen tip contacts the panel surface, causing uncomfortable feeling to the user
Solution Approach 1:
The processing unit applies a counter-vibration signal to the vibration device before or during the impact contact, creating an anti-action that cancels out the unwanted vibration caused by the pen tip impacting the panel surface. This preliminary counter-measure prevents the harmful vibration from occurring in the first place.
Solution Approach 2:
The system converts the harmful impact vibration into a beneficial effect by detecting the impact and responding with a controlled vibration signal. The processing unit transforms the unwanted mechanical impact into a controlled haptic response that provides feedback while eliminating the uncomfortable sensation.
2Reliability
If the vibration device is activated during pen input to reproduce tactile sensation, then the user feels the tactile feedback, but the vibration device cannot distinguish between controlled vibration and unwanted vibration from impact
Solution Approach 1:
The processing unit continuously monitors the state of the pen and panel contact, detecting when the pen tip contacts the panel surface. Based on this feedback, the system dynamically adjusts the vibration device operation, activating it during intentional pen input and suppressing it during impact contact, thereby distinguishing between useful and harmful vibrations.
Solution Approach 2:
The vibration control system dynamically adjusts its behavior based on real-time conditions. The processing unit changes the vibration state from active to suppressed depending on whether the pen is being used for input or contacting the panel surface, making the system adaptable to different operational contexts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses vibrations caused by impacts, providing a comfortable user experience by ensuring the vibrator remains stationary during non-use periods.
Implementation Method 1
a vibration device (21) containing a vibrator (21b)
Data Source
AI summary
A pen includes a vibration device including a vibrator, and a processing unit that suppresses movement of the vibrator during a pen non-use period during which no pen input is being performed.