Linear Vibrator with Projection for Localized Haptic Feedback
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Solution Overview
Problem
Existing vibration-producing devices in electronic devices provide generalized haptic feedback, which can be insufficiently precise for localized feedback, making it difficult for users to detect proper input on virtual or touch-based keyboards and buttons.
Innovation Solution
A linear vibrator with a mass and driver, contained within a shell, that oscillates to provide kinetic energy transfer through a leaf spring or elastic element to the device housing, allowing for both generalized and localized haptic feedback modes by adjusting the range of motion and impact on the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a linear vibrator is used to provide haptic feedback by shaking the device enclosure, then the device can provide generalized haptic feedback, but the feedback is insufficiently precise for localized input detection
Solution Approach 1:
The patent segments the haptic feedback function by introducing a projection that extends from the vibrator assembly through the housing. This projection acts as a localized interface element that can be independently actuated, separating the feedback mechanism from the entire device enclosure and enabling precise localized feedback at specific touch interface locations.
Solution Approach 2:
The patent applies local quality by concentrating the haptic feedback energy through the projection into a specific localized area of the housing rather than distributing it throughout the entire device. This creates a focused haptic response at the projection location, enabling precise localization of feedback corresponding to specific touch input areas.
2Measurement precision
If the linear vibrator oscillates to transfer kinetic energy to the housing, then generalized haptic feedback is produced, but the feedback lacks precision for confirming specific user inputs
Solution Approach 1:
The projection segments the feedback pathway, creating a dedicated localized channel for haptic feedback that corresponds to specific input areas. This segmentation preserves information about which specific input was activated by providing feedback at the corresponding spatial location.
Solution Approach 2:
The projection provides immediate localized tactile feedback to the user's finger, creating a closed-loop feedback system that confirms proper input detection. The feedback is spatially correlated with the input location, enhancing the user's ability to detect and verify their input actions.
3Adaptability or versatility
If the vibrator provides generalized feedback by vibrating the entire device, then all areas of the device receive feedback, but the feedback is insufficiently precise for touch-based keyboards and buttons
Solution Approach 1:
The projection segments the feedback delivery mechanism, enabling it to provide focused localized feedback at specific points while maintaining the ability to work with various touch interface types (keyboards, buttons, etc.). This segmentation provides adaptability to different input mechanisms while achieving precision.
Solution Approach 2:
The projection-based feedback mechanism provides universal applicability to different touch interface types (virtual keyboards, buttons, sliders) while maintaining precise localized feedback. The same projection structure can serve multiple input mechanism types, making the solution versatile and adaptable.
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 precise localized haptic feedback, confirming user input on touch-sensitive areas, such as virtual buttons, by creating vibrations limited to specific areas of the device, enhancing user interaction with electronic devices.
Implementation Method 1
The kinetic energy created by this oscillation may be transferred to the shell by a leaf spring or other coupling element coupling the mass and the shell
Implementation Method 2
The kinetic energy created by this oscillation may be transferred to the shell by a leaf spring or other coupling element coupling the mass and the shell
Implementation Method 3
During normal operation, the driver may oscillate the mass rapidly along an axis of motion
Implementation Method 4
The range of motion of the mass in the boosted mode is sufficient to cause the projection to impact a portion of the electronic device housing
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An apparatus for providing haptic feedback, including: a shell defining an aperture; a driver disposed within the shell; a mass disposed within the coil; and a projection connected to the mass and extending through the aperture. Also described herein is a method for providing generalized and localized haptic feedback, including the operations of: receiving an input signal; determining if the input signal corresponds to a generalized haptic feedback; if so, providing a first input to a linear vibrator; otherwise, providing a second input to a linear vibrator; wherein the linear vibrator outputs a generalized haptic feedback in response to the first input; and the linear vibrator outputs a localized haptic feedback in response to the second input.