VR Headset Field of View Matching to Reduce Sickness
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Solution Overview
Problem
Head-mounted displays often cause virtual reality (VR) sickness due to mismatches between the field of view of the displayed image and the viewer's actual field of view, leading to discomfort and motion sickness symptoms.
Innovation Solution
An image display system comprising an image display device and an image output device that communicate to adjust the field of view of the displayed image, with the image output device processing the original image based on attribute information about the viewer's field of view, such as cutting or stretching the image to match the display device's capabilities, thereby reducing VR sickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the field of view of the displayed image is widened to improve immersion, then the immersion quality is improved, but VR sickness increases due to mismatch with the viewer's actual field of view
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the field of view parameters of the displayed image to match the viewer's actual field of view. The system modifies image processing parameters (cropping, stretching, compressing) based on detected viewer characteristics such as interpupillary distance and lens parameters, thereby resolving the contradiction between immersion quality and VR sickness prevention.
2Object-affected harmful factors
If image processing is performed to adjust the field of view, then VR sickness is reduced, but the device complexity increases due to additional processing requirements
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing conversion parameters for different viewer types and display conditions. The system prepares lookup tables and pre-processes reference images so that during actual operation, only simple parameter selection and basic image transformation are needed, significantly reducing real-time processing complexity while maintaining effective VR sickness prevention.
3Manufacturing precision
If the image is cropped or stretched to match the display device's field of view, then the field of view matching is improved, but the image quality may deteriorate due to loss of original image data
Solution Approach 1:
The patent applies partial action by selectively cropping only the portions of the image that fall outside the viewer's actual field of view, while preserving the central region that contains the most important visual information. The system performs minimal necessary transformations (cropping, stretching, or compressing) based on the specific mismatch conditions, avoiding excessive processing that would cause unnecessary image quality degradation.
Data Source
AI summary
[Object] To provide an image display system that displays an image with a wide field of view while reducing VR sickness.[Solution] When a field of view FOVO of an original image provided by an image output device (200) is greater than a field of view FOVD of an image viewed by a user wearing an image display device (300), the image output device (200) cuts out a region with the field of view FOVD from the original image for delivery to the image display device (300). Also, when the field of view FOVO of the image viewed by the user wearing the image display device (300) is equal to or greater than the field of view FOVD of the original image provided by the image output device (200), the image output device (200) delivers the original image as-is to the image display device (300).