Haptic Pen Resonance Waveform for Lower-Power Strong Vibration
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Solution Overview
Problem
The existing haptic pens require excessive power for operation, leading to a short continuous operation time due to the high power consumption of haptic elements like LRA motors.
Innovation Solution
A haptic pen with a memory to store a reproduced waveform that includes resonant frequency periods and transition periods, where the waveform amplitude is controlled to be within a threshold, using a resonant frequency waveform to maintain vibration intensity while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the amplitude of the reproduced waveform is increased to provide strong vibration, then the vibration intensity is improved, but the power consumption increases
Solution Approach 1:
The patent utilizes resonance phenomenon where the haptic element is driven at its resonant frequency. By generating a reproduced waveform that matches the resonant frequency of the haptic element, strong vibration is achieved with minimal power input. The waveform generation unit creates a resonance waveform that exploits the natural vibrational characteristics of the haptic element, allowing efficient energy transfer and strong vibration output without excessive power consumption.
Solution Approach 2:
The patent changes the frequency parameter of the reproduced waveform to match the resonant frequency of the haptic element. Instead of using a fixed amplitude approach, the system adjusts the frequency parameter to optimize the vibration efficiency. This parameter change allows the haptic element to operate at its most efficient point, achieving maximum vibration intensity with minimum power consumption.
2Duration of action of moving object
If the power consumption is reduced to extend operation time, then the continuous operation time is improved, but the vibration intensity decreases
Solution Approach 1:
The system exploits resonance to achieve efficient vibration that maintains intensity while reducing power consumption. By operating the haptic element at its resonant frequency, the system minimizes energy loss and maximizes vibration efficiency, thereby extending continuous operation time without sacrificing vibration intensity.
Solution Approach 2:
The reproduced waveform is designed as a periodic resonance waveform that efficiently transfers energy to the haptic element. This periodic action at the resonant frequency creates sustained vibration with minimal energy input, allowing the battery to last longer while maintaining consistent vibration intensity throughout the operation period.
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
This approach allows for strong vibration without increasing the amplitude, thereby suppressing power consumption and extending the continuous operation time of the haptic pen.
Implementation Method 1
a resonant frequency period including a waveform of a sine wave vibrating at a resonant frequency of the haptic element
Data Source
AI summary
A haptic pen includes a controller, a haptic element coupled to the controller, and a speaker coupled to the controller. The controller controls vibration of the haptic element, and the speaker outputs sound in response to an electrical signal output from the controller.