Vibrator Pulse Timing for Stronger, Shorter Tactile Feedback
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Solution Overview
Problem
Conventional techniques for controlling vibration in tactile sensation presentation devices are inadequate in providing improved vibration control, leading to suboptimal user experience in terms of vibration stimulation duration and intensity.
Innovation Solution
An electrical device and method that utilize a first electrical pulse to maximize vibration displacement followed by a second pulse to offset the vibration, optimizing pulse width and polarity to enhance vibration stimulation intensity and shorten stimulation duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single electrical pulse is used to drive the vibrator, then the device configuration is simple, but the vibration duration is too long and the stimulation intensity is insufficient
Solution Approach 1:
The single electrical pulse is segmented into two distinct pulses: a first pulse that drives the vibrator to generate vibration, and a second pulse that offsets the vibration to terminate it quickly. This segmentation allows independent optimization of vibration generation and termination without adding complex mechanical structures.
Solution Approach 2:
The vibration control is achieved through periodic electrical pulses with specific timing and polarity. The first pulse initiates vibration, and the second pulse (applied at a specific time interval) terminates it, creating a controlled periodic action that optimizes both vibration duration and intensity.
2Device complexity
If a single electrical pulse is used to drive the vibrator, then the control method is simple, but the vibration stimulation intensity is insufficient
Solution Approach 1:
The control method segments the electrical signal into two pulses with different polarities and timing. The first pulse (positive polarity) drives the vibrator to maximum displacement, while the second pulse (negative polarity) rapidly terminates the vibration, achieving high stimulation intensity through optimized pulse sequencing rather than increasing single-pulse amplitude.
Solution Approach 2:
The invention changes multiple parameters of the electrical signal: polarity (positive to negative), timing (delay between pulses), and duration (pulse width optimized to half the natural period). These parameter changes enable high vibration stimulation intensity without requiring more complex control circuits or higher power consumption.
3Power
If the first electrical pulse width is extended to maximize vibration displacement, then the vibration intensity increases, but the vibration duration becomes too long
Solution Approach 1:
The second electrical pulse is applied in advance at a precisely calculated time point (when the vibration reaches maximum displacement or during the return phase) to preemptively terminate the vibration. This preliminary action prevents the vibration from continuing unnecessarily, thus limiting duration while maintaining peak intensity achieved by the first pulse.
Solution Approach 2:
The second electrical pulse with opposite polarity serves as a preliminary anti-action that counteracts and terminates the vibration generated by the first pulse. By applying this counter-pulse at the optimal moment, the system achieves high vibration intensity from the first pulse while immediately suppressing prolonged vibration, thus resolving the contradiction between intensity and duration.
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 provides stronger vibration stimulation while efficiently shortening the duration of vibration feedback, offering a more realistic tactile experience without the need for additional components like vibration attenuation members, thus simplifying the device configuration.
Implementation Method 1
a vibrator configured to vibrate a vibration target when receiving an electrical signal
Data Source
AI summary
An electrical device includes a vibrator and a controller. When receiving an electrical signal, the vibrator vibrates a vibration target. The controller inputs a first electrical pulse to the vibrator. Pulse width of the first electrical pulse is a period of time from the input of the first electrical pulse to the vibrator until displacement of the vibration target becomes maximum. After inputting the first electrical pulse, the controller inputs a second electrical pulse to the vibrator in such a way as to offset the vibration of the vibration target.