Actuator Driving Voltage Adjustment for Haptic Feedback
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Solution Overview
Problem
Actuators for generating haptic vibration in electronic devices produce varying intensities based on frequency, with human receptors like pacini corpuscles having different sensitivities, leading to inconsistent haptic feedback, especially outside the resonant frequency range.
Innovation Solution
An electronic device with a processor, sensor circuitry, and memory that detects haptic events, identifies actuator and human receptor data, and calculates a driving voltage to adjust haptic intensity across frequencies, ensuring consistent feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a constant voltage is applied to the actuator, then the actuator operates at its resonant frequency with highest vibration intensity, but the haptic vibration intensity becomes inconsistent when operating outside the resonant frequency region
Solution Approach 1:
The patent implements dynamic voltage adjustment based on the operating frequency of the actuator. The control circuit continuously monitors the driving frequency and modifies the driving voltage accordingly to maintain consistent haptic feedback intensity across different frequency ranges, resolving the contradiction between maximizing vibration intensity at resonant frequency and maintaining consistency outside resonant frequency.
Solution Approach 2:
The patent changes the electrical parameter (driving voltage) as a function of frequency to compensate for the actuator's frequency-dependent response characteristics. By adjusting the voltage parameter dynamically, the system maintains uniform haptic feedback intensity regardless of the operating frequency, thereby resolving the inconsistency problem.
2Adaptability or versatility
If the actuator operates at frequencies below 200 Hz or above 260 Hz, then the actuator can generate vibration, but the human receptor sensitivity decreases leading to perceived weak haptic feedback
Solution Approach 1:
The patent applies frequency-dependent voltage adjustment to compensate for human receptor sensitivity variations. The control circuit increases the driving voltage when operating in frequency ranges where human sensitivity is reduced (below 200 Hz or above 260 Hz), thereby maintaining consistent perceived haptic feedback intensity across the entire operating frequency range.
Solution Approach 2:
The patent incorporates feedback mechanisms that consider human receptor characteristics. The control system adjusts the driving voltage based on the operating frequency to account for human sensitivity variations, ensuring that haptic feedback remains perceptible and consistent across different frequency ranges despite the natural decline in human receptor sensitivity.
3Reliability
If the driving voltage is increased to compensate for low human receptor sensitivity at certain frequencies, then haptic feedback intensity improves, but energy consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment that increases energy consumption only when and where necessary. The control circuit monitors the operating frequency and selectively increases the driving voltage only in frequency ranges where human receptor sensitivity is reduced, rather than maintaining high voltage across all frequencies, thereby optimizing the balance between haptic feedback quality and energy efficiency.
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 allows for precise adjustment of haptic vibration intensity across frequencies, enhancing user experience by considering both actuator and human receptor characteristics, ensuring consistent feedback regardless of frequency.
Implementation Method 1
the actuator corresponds to a driving device operating a machine using a power, and hereinafter, it may be one of motors for generating haptic vibration in the electronic device
Implementation Method 2
a sensor circuitry; wherein the processor is configured to detect a haptic generation event through the sensor circuitry
Data Source
AI summary
Various embodiments of the present invention relate to a method for controlling an actuator. The present invention can detect a haptic generation event through a sensor unit, check data of an actuator and data of a human receptor stored in a memory in response to the haptic generation event, calculate a driving voltage of the actuator on the basis of the checked data of the actuator and the checked data of the human receptor, and drive the actuator with the calculated driving voltage. Other embodiments are also possible.