Joystick Chair Body-Position Input Device to Reduce VR Nausea
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Solution Overview
Problem
Current Virtual Reality (VR) input devices often cause user nausea, fatigue, and safety concerns due to inadequate synchronization of body and head movements, complex setup, and space limitations, leading to discomfort and reduced usage.
Innovation Solution
The Joystick Chair, a dual-position input device that allows users to control movements by leaning or sitting, using body movements to simulate 360-degree turns and separate control for forward and backward movements, processed by a microcontroller to eliminate nausea and fatigue while maintaining user safety and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard controller (gamepad) is used for movement control in VR, then hand thumbs can execute motion commands, but body and head movements are not synchronized causing user nausea
Solution Approach 1:
The patent replaces the manual gamepad control mechanism with an automated body-position-detection system. Sensors detect the user's actual body and head positions, and the system automatically generates movement commands that synchronize visual display with physical orientation, eliminating the disconnect that causes nausea.
Solution Approach 2:
The system continuously monitors body position through sensors and uses this feedback to adjust the virtual reality display in real-time. This closed-loop feedback ensures that the visual environment remains synchronized with the user's actual physical orientation, preventing motion sickness.
2Reliability
If body position recognition system is used to synchronize movements, then user safety and comfort improve, but setup complexity and space requirements increase
Solution Approach 1:
The patent employs a multi-functional base unit that integrates sensor arrays, processing electronics, and control mechanisms into a single platform. This universal device handles position detection, data processing, and command generation, eliminating the need for multiple separate components and simplifying setup.
Solution Approach 2:
The system combines multiple functional elements (sensors, processors, actuators) into an integrated base unit that works as a cohesive system. By merging these components, the patent reduces the number of separate parts the user must assemble and configure, thereby reducing setup complexity while maintaining safety and reliability.
3Object-affected harmful factors
If basic walking simulation system is used, then movement illusion is generated, but system is complicated, occupies large space, and leads to fatigue and injury
Solution Approach 1:
The patent extracts the essential function of movement simulation from complex mechanical walking systems and implements it through a simplified sensor-based detection and display synchronization system. By taking out only the necessary position-detection and visual-synchronization functions, the system generates movement illusion without the complexity and physical demands of full walking simulation mechanisms.
Data Source
AI summary
Joystick chair is an input device for interaction between the user and computer. It enables the movement of the user in games. The invention is used by placing feet on the platform (3) and sitting or leaning on the seat (23). Command for turning is achieved by rotating the seat (23), either to the left or to the right. Command for forward movement is issued by pulling the left or right controller (36, 41) with fingers, while the command for backward movement is issued by pushing the left or right controller (36, 41) away by palms. Control handles for lateral movement (49, 56) are separated from the forward-back controls that are located on the controllers (36, 41). Other commands are achieved with buttons on the left and right controller and they are accessible with thumbs. The software allows the modifications of all available actions of the invention.