Solenoid Haptic Actuator for Vehicle Displays
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Solution Overview
Problem
Existing vehicle display apparatuses with larger sizes face challenges in providing sufficient haptic feedback due to the limitations of piezo-based haptic functions.
Innovation Solution
A vehicle display apparatus incorporating a solenoid module with a moving core and a base core, elastically coupled via springs, which generates haptic feedback through magnetic vibrations, allowing for effective haptic feedback without occupying a large volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If piezo-based haptic functions are used in larger-sized vehicle display apparatus, then the display size is increased to provide more information, but sufficient haptic feedback cannot be provided
Solution Approach 1:
The patent replaces the piezo-based mechanical haptic system with a solenoid-based electromagnetic system. The solenoid module generates haptic feedback through electromagnetic force acting on a movable core, rather than relying on piezoelectric material deformation. This substitution enables sufficient haptic feedback in larger display apparatus where piezo-based systems fail to provide adequate force.
2Reliability
If a solenoid module is used to provide haptic feedback, then sufficient haptic feedback is provided for larger-sized display apparatus, but the device volume increases
Solution Approach 1:
The solenoid module is designed with a nested structure where the movable core is positioned inside the base core, and the coil is wound around the movable core. This nested arrangement minimizes the overall volume of the haptic actuator while maintaining sufficient haptic feedback capability for larger display apparatus.
Solution Approach 2:
The patent employs a planar coil winding pattern that surrounds the movable core in a compact configuration. By optimizing the spatial arrangement of coil turns and utilizing vertical stacking of components, the design achieves sufficient haptic force generation within a minimized footprint volume.
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 solenoid module provides sufficient haptic feedback for larger-sized vehicle display apparatuses, ensuring user recognition of touch inputs without increasing the device's volume.
Implementation Method 1
a coil formed in a base core which is elastically coupled to the display case, and has a moving core inserted therein, and the coil is wound in one direction to surround at least a portion of the moving core
Implementation Method 2
an arm plate elastically coupled to the display case; and a solenoid module... a moving core formed in a rod shape, and having both ends fixed to the arm plate; and a base core being elastically coupled to the display case
Data Source
AI summary
The present disclosure relates to a vehicle display apparatus including: a display case; an arm plate elastically coupled to the display case; and a solenoid module, wherein the solenoid module includes: a moving core formed in a rod shape, and having both ends fixed to the arm plate; and a base core being elastically coupled to the display case, and having a coil formed therein which is wound in one direction to surround at least a portion of the moving core.