Haptic Rotary Switch Differentiating Menu Positions via Vibration and Resistance
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Solution Overview
Problem
Conventional haptic steering wheel switches fail to differentiate tactile sensations by vibration and resistance for various menus, making it difficult for drivers to select menus without looking at the cluster display, thereby compromising driving safety.
Innovation Solution
The method differentiates haptic feelings by varying the vibration and resistance strengths when scrolling through menus, allowing drivers to perceive menu positions without visual confirmation by adjusting haptic feeling strengths based on user selection modes and menu types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the number of switches mounted on the steering wheel is increased to improve convenience, then the convenience in manipulation is improved, but the driver's attention is distracted and driving safety decreases
Solution Approach 1:
Multiple switch functions are merged into a single rotary switch unit that can perform selection, scrolling, and menu navigation through rotational movements in different directions and intensities, reducing the number of separate switches on the steering wheel
Solution Approach 2:
The rotary switch is designed as a multi-functional device that can access main menus, sub-menus, and various control functions through different scrolling patterns and rotation directions, allowing one switch to replace multiple specialized switches
2Device complexity
If uniform haptic feedback is provided for all menu selections, then the switch structure is simple, but the driver cannot distinguish menu positions without visual confirmation
Solution Approach 1:
Different haptic feedback characteristics are applied to different menu selection contexts: strong resistance for main menu items, weak resistance for sub-menu items, and distinct vibration patterns for selection confirmation, allowing tactile differentiation without complex mechanical structures
Solution Approach 2:
The haptic feedback system varies vibration frequency, amplitude, and resistance strength based on the menu state and selection stage, providing distinguishable tactile cues through parameter modulation rather than structural complexity
3Measurement precision
If the driver watches the cluster display window to select menus accurately, then menu selection precision is improved, but driving safety is degraded
Solution Approach 1:
The rotary switch provides self-service tactile guidance through differentiated haptic feedback that enables the driver to identify menu positions and make selections through touch alone, without requiring visual confirmation of the display
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 drivers to perform blind control of menu selections, enhancing driving safety by allowing them to keep their eyes on the road while using the haptic rotary switch to select various functions.
Implementation Method 1
a haptic rotary switch driver mounted in a steering wheel and configured to generate a rotational force
Implementation Method 2
the tactile sensations by vibration and resistance against turning the switch for respective menus are transferred to the driver
Implementation Method 3
the tactile sensations by vibration and resistance against turning the switch for respective menus are transferred to the driver
Data Source
AI summary
The present invention relates to a method for differentiating haptic feelings by a selection menu of a rotary switch, in which haptic feelings of the switch or rotary switch can be differentiated by each menu when scrolling the rotary switch in order to setup or select a variety of functions of an electronic product. Specifically, the haptic feelings by vibration and resistance against turning the switch are transferred to a user at different strengths when the user scroll-manipulates a switch to select a variety of menus, selects items of a first menu, transits first menu from the first menu to a second menu, and selects items of each second menu, so that the user can easily perceive the positions of the respective menus even without watching a cluster display window.