Multilayer Controller With Dynamic Expansion Assemblies for VR Haptics
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Solution Overview
Problem
Existing virtual reality systems fail to effectively simulate the tactile interaction of diverse virtual objects using fixed-shape controllers, limiting user engagement and realism.
Innovation Solution
A multilayer controller (MLC) with independently controllable expansion assemblies that adjust their size and shape to mimic virtual objects, allowing whole-hand interaction and haptic rendering through a unique cylindrical arrangement with four actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed-shape controller is used in VR systems, then the device complexity is reduced and ease of manufacture is improved, but the adaptability to simulate diverse virtual objects deteriorates
Solution Approach 1:
The controller employs four independent expansion assemblies that can dynamically change the controller's shape and size to match different virtual objects. Each assembly includes actuators that adjust the girth independently, allowing the physical controller to transform from a fixed shape to a dynamic, adaptable form that mimics various virtual object geometries.
Solution Approach 2:
The controller is divided into four independently controllable expansion assemblies arranged circumferentially around the housing. Each assembly can be adjusted separately to create different overall shapes, enabling the system to simulate diverse object forms through coordinated segmentation control rather than requiring a completely redesignable monolithic structure.
2Adaptability or versatility
If multiple physical props are used to align with virtual content, then the adaptability to simulate different object shapes is improved, but the device complexity and ease of operation deteriorates
Solution Approach 1:
A single controller housing with four expansion assemblies serves multiple functions that would otherwise require separate physical props. The same base controller can transform into different shapes to represent various virtual objects, eliminating the need for users to handle multiple different physical controllers or props while maintaining ease of operation.
Solution Approach 2:
The controller dynamically transforms its shape through automated actuator control rather than requiring manual reconfiguration. The system automatically adjusts the expansion assemblies to match the target virtual object's geometry, freeing the user from the complexity of manually switching between different physical props.
3Adaptability or versatility
If devices with moving parts are used for versatile haptic rendering, then the adaptability to simulate different object sizes is improved, but the device complexity and mechanical reliability deteriorates
Solution Approach 1:
The expansion assemblies are nested within the controller housing, with each assembly containing its own actuators and mechanical components compactly arranged. This nested configuration allows multiple moving parts to be integrated within a single compact unit, reducing overall device complexity while maintaining the ability to simulate different object sizes and shapes.
Solution Approach 2:
Four expansion assemblies are merged into a single integrated controller structure, sharing common housing and control systems. The actuators for each assembly are combined within the same physical space, reducing the total complexity compared to having separate devices for each function, while still providing versatile haptic rendering capabilities.
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 realistic and versatile tactile simulation of various virtual objects with reduced mechanical complexity, supporting quick shape changes and user input, enhancing user interaction and immersion in VR environments.
Implementation Method 1
The haptic output device includes a motor, a cam, and a plurality of radially-extending pins. The motor is configured to receive a control signal from a processor and is configured to rotate relative to the housing in response to the control signal. The cam converts rotary motion of the motor to linear motion to move the plurality of radially-extending pins to thereby radially extend the deformable membranes
Data Source
Figure 1A
Figure 1B~1D
Figure 2A~2B
AI summary
The present concepts relate to devices that can employ graspable controllers that can be employed in various scenarios, such as virtual reality scenarios and augmented reality scenarios. One example device can include multiple expansion assemblies having independently adjustable girths. The multiple expansion assemblies can be stacked adjacent to one another along an axis. A controller can be configured to expand or contract the girths of the expansion assemblies to collectively approximate girths of an object.