Thin-Film Haptic Deformation Structure for Flexible Force Feedback

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Solution Overview

Problem

Current haptic devices in VR and AR are bulky, uncomfortable, and limited in function, with actuators that reduce realism due to size and frequency limitations, and hydraulic deformation devices are inflexible and unable to conform to body curvature.

Innovation Solution

A haptic device incorporating a deformation component, a vibrotactile component, and an electrostatic friction component, all made of flexible thin films, utilizing microfluidic chambers and electrostatic forces to provide realistic tactile sensations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rigid actuators are used to provide haptic feedback, then the device structure is simple and reliable, but the device size increases and frequency response is limited

Engineering Contradiction:

Improvehaptic feedback reliabilityVSAvoiddevice size

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent replaces rigid actuators with flexible thin-film components including a deformation layer, membrane layer, and flexible substrate. These thin-film structures enable haptic feedback while maintaining a compact, flexible form factor that can conform to body surfaces, resolving the contradiction between reliability and device size.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent substitutes traditional mechanical rigid actuator systems with an electrostatic-driven flexible membrane system. By applying voltage to the electrode layer, the membrane deforms to produce haptic feedback, eliminating the need for bulky mechanical components while maintaining operational reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Length of moving object

If flexible vibration elements are used to reduce device size, then the device becomes compact and adaptable, but high voltage is required to achieve significant vibration feedback

Engineering Contradiction:

Improvedevice sizeVSAvoidvoltage requirement

Core Design Contradiction:

Length of moving objectVSUse of energy by moving object

Solution Approach 1:

The patent employs a composite structure consisting of a dielectric fluid layer, membrane layer, and electrode layer. This composite design enables the flexible vibration element to generate significant haptic feedback at lower voltages by utilizing the combined properties of the dielectric fluid for actuation and the membrane for mechanical amplification, resolving the contradiction between compact size and voltage requirement.

Inventive Principle:

Principle #40Composite materials

3Force

If hydraulic deformation devices are used to provide haptic feedback, then the actuation force is sufficient, but the device becomes inflexible and cannot conform to body curvature

Engineering Contradiction:

Improveactuation forceVSAvoidflexibility and conformability

Core Design Contradiction:

ForceVSAdaptability or versatility

Solution Approach 1:

The patent replaces rigid hydraulic chambers with flexible thin-film components including a membrane layer and flexible substrate. The dielectric fluid is contained within these flexible structures, enabling the device to maintain sufficient actuation force while conforming to body curvature and providing the adaptability needed for wearable applications.

Inventive Principle:

Principle #30Flexible shells and thin films

4Length of moving object

If traditional haptic devices are made thin (less than 1 mm), then the comfort and wearability improve, but the existing reservoir structure cannot satisfy the thinness requirement and lacks flexibility

Engineering Contradiction:

Improvedevice thicknessVSAvoidflexibility

Core Design Contradiction:

Length of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent achieves device thickness of less than 1 mm by replacing the traditional rigid reservoir with ultra-thin flexible components including a membrane layer and flexible substrate. The dielectric fluid is contained within these thin-film structures, enabling both the required thinness for comfort and the flexibility to conform to body surfaces.

Inventive Principle:

Principle #30Flexible shells and thin films

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 device offers enhanced flexibility, comfort, and diverse haptic feedback, including vibration, force feedback, and surface texture perception, improving user experience.

Implementation Method 1

utilizing microfluidic chambers and electrostatic forces to provide realistic tactile sensations

Methodology Applied

Scientific EffectElectrostatic force: Electrostatics

Data Source

PatentUS20260068528A1Haptic device, deformation component, and fabricating method therefor

Publication Date: 2026.03.05 IND TECH RES INST

AI summary

A deformation component including a first electrode pair, an insulating layer, a dielectric fluid and a deformation layer is provided. The insulating layer is disposed between the first electrode pair to define a microfluidic chamber, the dielectric fluid is located between the first electrode pair and in the microfluidic chamber. The deformation layer is disposed on the first electrode pair and the dielectric fluid, wherein the dielectric fluid contacts the first electrode pair, the insulating layer and the deformation layer. A haptic device including the above-mentioned deformation component, a vibrotactile component, and an electrostatic friction component is provided, wherein the vibrotactile component and the electrostatic friction component are respectively disposed on two opposite sides of the deformation component.