Haptic Actuator Driven by Analog Sound Signals
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Solution Overview
Problem
Current haptic technologies in virtual and augmented reality are primitive in providing realistic and rich tactile sensations compared to advanced visual and auditory experiences, lacking in effectively converting sound signals into haptic feedback.
Innovation Solution
A haptic device that receives digital sound signals from portable terminals, converts them into analog signals using a digital-to-analog converter, and drives a haptic actuator to provide tactile feedback, incorporating filters and amplifiers to optimize frequency ranges and intensity, allowing for independent control of sound and haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If digital sound signals are directly fed to haptic actuators without conversion, then device complexity is reduced, but haptic feedback quality and realism deteriorate
Solution Approach 1:
The patent introduces a digital-to-analog converter (DAC) as an intermediary component between the digital sound signal source and the haptic actuator. The DAC converts digital sound signals into analog signals that can properly drive the haptic actuator, enabling high-quality haptic feedback while maintaining a clean signal transmission path without requiring complex digital signal processing circuits.
2Manufacturing precision
If sound signals are converted to analog signals for haptic feedback, then haptic realism is improved, but device complexity increases
Solution Approach 1:
The patent makes the haptic actuator serve multiple functions: it acts as both a standard haptic feedback device and a digital-to-analog converter. By designing the haptic actuator to directly respond to analog signals while receiving digitally-filtered input, the system eliminates the need for separate DAC hardware, reducing overall device complexity while maintaining high haptic feedback realism.
Solution Approach 2:
The patent replaces traditional electronic signal conversion mechanisms with a hybrid approach combining digital signal processing (filtering) and direct haptic actuator response. Instead of using complex analog circuitry for signal conversion, the system uses digital filters followed by direct haptic actuator drive, substituting mechanical/electronic conversion components with a streamlined signal processing approach.
3Adaptability or versatility
If haptic feedback is provided through eccentric motors in portable terminals, then device integration is improved, but haptic signal quality and richness deteriorate
Solution Approach 1:
The patent changes the operational parameters of the haptic actuator by providing it with filtered and optimized analog signals derived from digital sound signals. By adjusting frequency ranges through digital filtering and converting to analog domain, the system enhances the richness and quality of haptic feedback while maintaining integration within portable terminals, overcoming the limitations of traditional eccentric motor haptic signals.
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
Enables rapid and efficient haptic feedback without time delay, enhancing immersion and realism in experiences like gaming and music, by providing tailored tactile sensations corresponding to sound signals without the need for a battery, thus increasing user engagement and convenience.
Implementation Method 1
a digital-to-analog converter (DAC) for receiving the digital sound signal from the medium and converting the digital sound signal into an analog signal
Implementation Method 2
a haptic actuator driven by receiving the analog signal
Data Source
AI summary
Provided is a haptic device including a medium for receiving a digital sound signal from a portable terminal, a digital-to-analog converter (DAC) for receiving the digital sound signal from the medium and converting the digital sound signal into an analog signal, a sound outputter for receiving the analog signal and outputting sound, and a haptic actuator driven by receiving the analog signal.