Remote Video Display Mode Switching to Reduce Motion Sickness
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Solution Overview
Problem
Remote controlled devices, such as robots, can cause visually induced motion sickness and confusion in users when they move independently of the user's intentions, especially when taking risk-avoidance actions.
Innovation Solution
The system includes a remote controlled device with a camera and video signal processor that adjusts the frame rate and superimposes additional data to indicate rotational periods, and an image display device that adjusts display modes based on detected user movements and additional data, to synchronize the video signal with user intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remote controlled device moves independently to avoid risks, then the safety and reliability of the device is improved, but the user experiences visually induced motion sickness and confusion
Solution Approach 1:
The patent changes the frame rate parameter of the video signal based on the movement state of the remote controlled device. When the device moves independently, the system switches to a lower frame rate (e.g., from 60fps to 30fps or lower), which reduces the visual flicker and motion discomfort experienced by the user while still conveying the necessary visual information about the device's independent safety actions.
Solution Approach 2:
The video signal processing system dynamically adjusts its parameters based on real-time movement data. The controller monitors whether the remote controlled device is moving according to user input or independently, and dynamically switches between different frame rates accordingly. This dynamic adaptation allows the system to maintain high visual quality during normal operation while reducing motion sickness during independent safety movements.
2Speed
If the video signal updates rapidly to reflect real-time movements, then the real-time performance and responsiveness is improved, but the user experiences visual confusion and motion sickness
Solution Approach 1:
The patent applies parameter changes by adjusting the frame rate of the video signal based on the operational context. During normal user-controlled movement, a higher frame rate maintains responsiveness and real-time performance. During independent risk-avoidance movements, the frame rate is reduced to minimize visual confusion and motion sickness, thus dynamically optimizing the parameter to balance real-time performance with user comfort.
3Stability of the object's composition
If the frame rate is maintained at a high level during independent movements, then the video quality and smoothness is improved, but the user experiences increased motion discomfort
Solution Approach 1:
The system changes the frame rate parameter from a constant high value to a variable value that adapts to the movement context. When the remote controlled device executes independent risk-avoidance actions, the frame rate is reduced, which decreases the visual stability that would otherwise cause motion discomfort. This parameter adjustment maintains an appropriate balance between video smoothness and user comfort during autonomous safety operations.
Data Source
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Figure 2A~2B
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AI summary
When a controller (31) controls a driver (32) so as to move a moving unit (33) in accordance with a user's movement, the controller (31) controls a video signal processor (36) such that frame videos of a video signal transmitted to an image display device (10) have a first display mode. When the controller (31) controls the driver (32) so as to move the moving unit (33) regardless of the user's movement, the controller (31) controls the video signal processor (36) such that frame videos of a video signal transmitted to the image display device (10) have a second display mode.