Haptic Device Using Segmented Assemblies for Multi-Directional Feedback
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Solution Overview
Problem
Conventional haptic devices for virtual and augmented reality are cumbersome and limited to single-dimensional information transfer, impeding user dexterity and motion, and failing to provide multiple types of haptic stimulations simultaneously.
Innovation Solution
A compact haptic device with novel haptic assemblies, including actuators and end effectors, that create distinct haptic cues such as vibration, pressure, and rotational shear, allowing for simultaneous stimulation and increased information transfer by combining different haptic modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional haptic devices are used, then haptic stimulation is provided, but user dexterity and motion are impeded
Solution Approach 1:
The haptic device is divided into multiple independent haptic assemblies, each capable of providing specific haptic stimulations. This segmentation allows the device to be more modular and potentially more compact, reducing the overall bulk while maintaining multiple haptic functions
Solution Approach 2:
Each haptic assembly is designed to provide multiple types of haptic stimulations (vibration, pressure, shear) through a single integrated unit. This multi-functionality reduces the need for separate devices for each haptic type, thereby reducing overall device bulk and improving user dexterity
2Loss of information
If conventional haptic devices are used, then single-dimensional information transfer is achieved, but information transfer capacity is limited
Solution Approach 1:
The patent transitions from single-dimensional vibration haptic feedback to multi-dimensional haptic feedback by incorporating vibration, pressure, and shear stimulations. This dimensional expansion of haptic capabilities significantly increases information transfer capacity, achieving approximately 2.15 bits of information transfer compared to 0.5 bits with conventional devices
Solution Approach 2:
Each haptic assembly is designed to provide multiple types of haptic stimulations (vibration, pressure, shear) through a single integrated unit. This multi-functionality enables the device to convey multiple dimensions of information simultaneously, greatly enhancing information transfer capacity
3Ease of operation
If compact haptic device design is implemented, then user dexterity is improved, but device functionality is reduced
Solution Approach 1:
Each haptic assembly is designed to provide multiple types of haptic stimulations (vibration, pressure, shear) through a single integrated unit. This multi-functionality allows the compact device to maintain rich haptic capabilities while preserving user dexterity
Solution Approach 2:
Multiple haptic stimulation capabilities are merged into single integrated haptic assemblies. By combining vibration, pressure, and shear functions in one compact unit, the device maintains versatility without increasing size, thus preserving user dexterity
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 enhances user experience by providing multiple haptic stimulations without encumbering movement, significantly increasing information transfer capacity compared to conventional devices, enabling a more immersive virtual and augmented reality experience.
Implementation Method 1
The first actuator is a voice coil, and the second actuator is a direct current (DC) motor. The first actuator is configured to: (i) vibrate (i.e., move the first end effector in the one or more first directions at a predetermined frequency)
Implementation Method 2
The second actuator is configured to rotate the second end effector to create the third haptic stimulation. The third haptic stimulation involves rotational shear.
Data Source
AI summary
A haptic device is provided that includes a first haptic assembly, comprising (i) a first end effector, and (ii) a first actuator coupled with the first end effector. The first actuator is configured to move the first end effector in first direction(s). The first haptic assembly is configured to create a first haptic stimulation or a second haptic stimulation, felt by a wearer of the haptic device, when the first actuator moves the first end effector in the first direction(s). The haptic device includes a second haptic assembly, comprising: (i) a second end effector, and (ii) a second actuator coupled with the second end effector. The second actuator is configured to move the second end effector in second direction(s). The second haptic assembly is configured to create a third haptic stimulation, felt by the wearer, when the second actuator moves the second end effector in the second direction(s).