Vector-Specific Haptic Feedback Using Electroactive Polymers
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Solution Overview
Problem
Current user interface devices (UIDs) such as video game controllers and mice provide limited and non-specific haptic feedback due to off-center, rotating mass on-a-spring type actuators, which are inefficient and have slow response times, resulting in a limited user sensory experience.
Innovation Solution
Implementing a vector-specific actuator with electrically-deformable materials like electroactive polymers (EAP) or electrostatic materials in UIDs, which receive input from associated devices to determine and impart direction and magnitude of movement for realistic haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If off-center rotating mass on-a-spring actuators are used, then haptic feedback can be provided, but the feedback is non-specific and the response time is slow
Solution Approach 1:
The patent replaces the traditional mechanical mass-on-a-spring actuator system with an electromagnetic actuator system. This substitution enables vector-specific haptic feedback by using electromagnetic fields to directly control the motion of haptic elements, achieving both faster response times and more specific feedback directions without the mechanical limitations of rotating mass systems.
Solution Approach 2:
The patent changes the fundamental operating parameters of the actuator by transitioning from mechanical rotation to electromagnetic actuation. This allows independent control of multiple haptic elements in different directions simultaneously, enabling vector-specific feedback while reducing response time through direct electromagnetic actuation rather than mechanical inertia-based motion.
2Manufacturing precision
If off-center rotating mass actuators are used, then haptic feedback can be generated, but power consumption is high
Solution Approach 1:
The patent replaces the mechanically intensive mass-on-a-spring system with an electromagnetic actuator that uses electrical fields to generate haptic feedback. This substitution reduces power consumption by eliminating the need for continuous mechanical rotation and heavy mass movement, while still providing high-quality vector-specific haptic feedback through controlled electromagnetic forces.
3Adaptability or versatility
If traditional actuators are used, then device complexity is low, but haptic feedback adaptability is limited
Solution Approach 1:
The patent segments the haptic feedback system into multiple independently controllable haptic elements or zones within the actuator array. Each segment can be actuated independently in different directions with different intensities, enabling highly adaptable vector-specific feedback. This segmentation is achieved through spatial arrangement of multiple electromagnetic actuators or elements that can be controlled separately.
Solution Approach 2:
The patent adds dimensional capability to haptic feedback by enabling motion in multiple directions (vectors) simultaneously rather than limited to single-axis rotation. The electromagnetic actuator system can generate forces in various spatial dimensions, allowing haptic feedback to correspond to complex virtual event vectors and providing adaptability across different interaction scenarios.
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 provides a more immersive sensory experience by enabling vector-specific haptic feedback that correlates with user interactions, improving power efficiency and response time, allowing for a more realistic simulation of virtual events in applications like video games.
Implementation Method 1
the electrically-deformable material can be an electroactive polymer (EAP) which undergoes a deformation when a drive voltage(s) is applied to it
Implementation Method 2
the electrically-deformable material can be an electrostatic material forming a structure which, by virtue of its shape, undergoes a deformation when a drive voltage(s) is applied to it
Data Source
AI summary
In one or more embodiments, vector-specific movement can be imparted to a user interface device (UID) to provide vector-specific haptic feedback. In at least some embodiments, this vectored movement can be based on input received by the UID. The input can include information associated with the user's interaction with an associated device integrated with or communicatively linked with the UID, and or with an application implemented on the associated device. In at least some embodiments, the UID can be configured with a controller, a microprocessor(s), and a vector-specific actuator that includes an electrically-deformable material.