Haptic Feedback Knob Using Electrostatic Pressure
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Solution Overview
Problem
Current vehicle interfaces, such as mechanical dials and touch screens, lack tactile feedback, making it difficult for users to determine the rotation or selection of controls without visual confirmation, and often require additional components, increasing complexity and cost.
Innovation Solution
A touch screen with a haptic feedback knob arrangement that utilizes a controllable electrostatic pressure region and a rotatable knob, providing virtual detents through electrostatic pressure, allowing users to feel resistance and stops during rotation, thereby simplifying the user experience and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical detents are used to provide tactile feedback, then haptic feedback is improved, but device complexity increases due to extra components
Solution Approach 1:
The patent replaces mechanical detents with an electrostatic field generated by a capacitive sensor. The electrostatic field creates virtual detents that provide tactile feedback without requiring physical mechanical components. The controller modulates the electrostatic field to simulate detent sensations, eliminating the need for extra mechanical parts while maintaining haptic feedback functionality.
Solution Approach 2:
The patent changes the physical state by using electrostatic fields instead of mechanical structures. The controller adjusts the electrostatic field parameters (strength, distribution, timing) to create variable haptic feedback patterns that simulate mechanical detents, allowing dynamic control of tactile feedback without physical component changes.
2Device complexity
If traditional touch screens are used, then device complexity is reduced, but ease of operation deteriorates due to lack of tactile feedback
Solution Approach 1:
The patent introduces haptic feedback through the electrostatic field that interacts with the user's finger. When the user touches or rotates the knob, the capacitive sensor detects the interaction and the controller provides tactile feedback by modulating the electrostatic field, creating a sense of resistance and detents that enhances operability without adding mechanical feedback mechanisms.
Solution Approach 2:
The patent substitutes mechanical feedback mechanisms with electrostatic field-based haptic feedback. The electrostatic field creates virtual mechanical sensations that guide user interaction, replacing the need for physical tactile cues while maintaining ease of operation.
3Ease of operation
If electrostatic pressure region is added to touch screen, then tactile feedback is improved, but device complexity increases
Solution Approach 1:
The patent makes the capacitive sensor serve multiple functions: it detects touch position, determines rotation direction and amount, and generates haptic feedback through the electrostatic field. This multi-functionality eliminates the need for separate control mechanisms, reducing overall device complexity while providing tactile feedback.
Solution Approach 2:
The patent merges the touch detection function and haptic feedback generation into a single electrostatic field system. The capacitive sensor and electrostatic field work together as an integrated unit, combining multiple functions into one mechanism that reduces complexity compared to separate systems.
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 solution enhances user interaction by providing tactile feedback similar to mechanical knobs, simplifying the interface, reducing component complexity, and lowering costs while maintaining intuitive control over vehicle systems.
Implementation Method 1
an electrostatic pressure region across a portion of the interactive surface... providing virtual detents through electrostatic pressure... receives rotational resistance from the electrostatic pressure region
Data Source
AI summary
A touch screen with haptic feedback knob arrangement. The arrangement includes an interactive surface having a controllable electrostatic pressure region across a portion of the interactive surface. The arrangement further includes a controller having an algorithm programmed thereon for controlling the amount of electrostatic pressure applied to the portion of the interactive surface where the electrostatic pressure region is located. A knob is rotatably mounted to the interactive surface and receives rotational resistance from the electrostatic pressure region of the interactive surface.