Moving Magnet Actuator for Nuanced Haptic Alerts
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Solution Overview
Problem
Current mobile devices lack nuanced vibration alerting capabilities to differentiate between various events, unlike audio alerts which can provide distinct tones for specific notifications, limiting the ability to communicate information tactically through vibrations.
Innovation Solution
A system incorporating a distributed mode loudspeaker and moving magnet actuator that produces both acoustic and haptic outputs, allowing users to program specific haptic alerts for events, such as emails from particular contacts, using varying intensity and patterns to distinguish between different notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration alerting uses simple high-frequency vibration to alert users, then the alerting capability is strong and reliable, but the ability to provide nuanced communication and differentiate between events is lost
Solution Approach 1:
The patent segments the vibration alerting function into multiple independent vibration motors, each capable of being controlled separately. This allows different vibration patterns, frequencies, and intensities to be generated simultaneously or sequentially, enabling nuanced communication while maintaining reliable alerting capability.
Solution Approach 2:
The patent implements dynamic control of vibration parameters including frequency, magnitude, and temporal patterns. The system can vary these parameters in real-time to convey different types of information, transforming a static vibration alert into a dynamic communication medium that preserves both reliability and information content.
2Loss of information
If haptic feedback devices use advanced waveforms to convey information, then nuanced communication is achieved, but device complexity increases
Solution Approach 1:
The patent makes the vibration motors multi-functional by enabling them to serve both as simple alerting mechanisms and as nuanced haptic feedback devices. Through software control and configurable vibration patterns, the same hardware components can adapt to different communication needs, reducing overall device complexity while maintaining advanced communication capabilities.
Solution Approach 2:
The patent achieves nuanced communication by changing physical parameters of vibration (frequency, magnitude, duration, pattern) rather than adding complex hardware. This parameter-based approach allows advanced haptic feedback with variable waveforms while keeping the device structure relatively simple and manageable.
3Reliability
If vibration alerting provides strong vibration to ensure user awareness, then alert reliability is improved, but the ability to provide directional or nuanced feedback is reduced
Solution Approach 1:
By segmenting the vibration alerting system into multiple independently controllable motors positioned at different locations, the patent enables both strong overall vibration for user awareness and differentiated directional feedback. Each motor can be activated selectively or with varying intensities to provide spatially distributed haptic information while maintaining reliable alerting.
Solution Approach 2:
The patent applies local quality by allowing different regions of the device (different vibration motor locations) to have different vibration characteristics. This enables strong vibration where needed for alerting while providing nuanced directional or patterned feedback at specific locations, simultaneously achieving user awareness and adaptability.
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 users to receive nuanced tactile feedback in public or unsafe environments, allowing for directional guidance and event identification without visual interaction, enhancing the usability of mobile and wearable devices.
Implementation Method 1
A movable component arranged to interact with a magnetic field generated by a voice coil to produce an electromagnetic force
Implementation Method 2
At least two elastic components, each having an initial length and an elastic limit... capable of returning to their initial length
Data Source
Figure 1~2A
Figure 2B~2C
Figure 3A~3B
AI summary
A system includes a device chassis (102) with a back panel and a haptic conduction interface (210). An acoustic radiating panel (232), attached to the chassis, and the back panel define a space. A moving magnet actuator (201) is positioned in the space and mechanically coupled to the acoustic radiating panel, the moving magnet actuator including an element having a thickness smaller than a first dimension of the space, the moving magnet actuator being configured to vibrate the element during operating. An electronic control module coupled to the moving magnet actuator is programmed to activate the moving magnet actuator with a haptic signal that displaces the element in the first direction an amount sufficient to cause the element to contact the haptic conduction interface, the haptic signal having an amplitude and frequency sufficient to generate a haptic response in the device chassis.