Steering Wheel Touch Interface With Haptic Feedback Confirmation
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Solution Overview
Problem
Existing automotive user interfaces for steering wheels lack effective haptic feedback mechanisms, making it difficult for drivers to interact with controls without visual confirmation, which can lead to distractions and reduced safety.
Innovation Solution
The user interface integrates a base display with a vibrotactile haptic actuator and a force sensor, along with a capacitive touch sensing surface and an outer layer providing surface friction haptic feedback, allowing for tactile confirmation of button presses and icon locations without visual attention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual confirmation is required for control interaction, then interaction accuracy is improved, but driver distraction increases and safety deteriorates
Solution Approach 1:
The patent implements haptic feedback mechanisms including surface friction haptic feedback on the outer layer and vibrotactile haptic feedback through actuators coupled to the display. These feedback mechanisms provide tactile confirmation to the driver when interacting with controls, eliminating the need for visual confirmation and thereby reducing driver distraction while maintaining interaction accuracy
Solution Approach 2:
The control interface is segmented into multiple interactive regions with distinct haptic characteristics. The outer layer contains capacitive touch-sensitive regions with varying surface friction properties, allowing drivers to differentiate between controls through tactile feedback alone, improving interaction accuracy without visual attention
2Ease of operation
If haptic feedback mechanisms are added to the user interface, then tactile confirmation is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple haptic feedback mechanisms into a unified user interface system. The outer layer integrates capacitive touch sensing, surface friction haptic feedback, and vibrotactile haptic actuators into a single cohesive structure that provides tactile confirmation without requiring separate control mechanisms
Solution Approach 2:
The outer layer serves multiple functions simultaneously: it acts as a protective cover, a capacitive touch sensing surface, and a haptic feedback interface through surface friction variations. This multi-functionality reduces the need for additional components and simplifies the overall device structure
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
This solution enhances driver interaction by providing tactile feedback, reducing the need for visual confirmation and minimizing distractions, thereby improving safety and usability of vehicle controls.
Implementation Method 1
capacitive touch sensing surface
Implementation Method 2
light-emitting diode (LED) backlighting
Implementation Method 3
vibrotactile haptic actuator
Implementation Method 4
force sensor coupled to the capacitive touch sensing surface
Implementation Method 5
outer layer configured to generate surface friction haptic feedback
Data Source
AI summary
A user interface for a vehicle includes a base display, a vibrotactile haptic actuator coupled to the base display, and a force sensor coupled to the base display. The user interface also includes an outer layer coupled to the base display. The outer layer is configured to generate surface friction haptic feedback.