Wearable Display 3D Image Roll Component Exclusion
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Solution Overview
Problem
Wearable display apparatuses using virtual reality (VR) technology often cause user disorientation and discomfort due to head movement, as they are designed for a fixed horizontal eye position, leading to poor recognition of 3D images and potential physical issues like headaches or dizziness.
Innovation Solution
A wearable display apparatus equipped with sensors and a processor that adjusts 3D image display by excluding the roll component of user motion, allowing for seamless head tilting and maintaining optimal image recognition and comfort by gradually rotating images when the user tilts their head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 360-degree VR 3D image is generated using images captured by a camera horizontal to the ground surface, then users experience an optimal VR effect when both eyes are horizontal to the ground surface, but users become disoriented and experience physical pain when they shake or tilt their heads
Solution Approach 1:
The patent applies dynamics by making the displayed image adaptive to the user's head motion state. The processor dynamically adjusts the image orientation based on motion data from sensors, transitioning from a fixed horizontal image to one that rotates with the user's head movements. This resolves the contradiction by allowing the system to maintain optimal VR quality when the user's head is horizontal while also accommodating tilted head positions through dynamic image rotation.
Solution Approach 2:
The patent implements feedback by using motion sensors to detect the user's head position and motion state, then using this information to adjust the displayed image in real-time. The processor receives motion data, determines the appropriate rotation angle, and rotates the image accordingly. This closed-loop feedback mechanism ensures the image remains properly oriented regardless of head tilting, eliminating disorientation while preserving VR immersion.
2Ease of operation
If the displayed image is rotated to follow head movement, then visibility is improved for tilted head positions, but the user may experience cognitive dissonance due to the rotating image
Solution Approach 1:
The patent applies partial action by selectively rotating the image based on the head motion state. Rather than always rotating the image with head movements, the system only rotates when necessary (when the head is tilted beyond a threshold). This partial rotation approach improves visibility for tilted positions while avoiding excessive rotation that would cause cognitive dissonance, thus resolving the contradiction between recognition ease and cognitive comfort.
3Object-generated harmful factors
If the image is gradually rotated over time, then cognitive dissonance is reduced, but the response to head movement becomes delayed
Solution Approach 1:
The patent implements periodic action by using gradual, incremental image rotation rather than immediate full rotation. The image rotates step-by-step over a period of time to reach the target orientation, which reduces cognitive dissonance by making the transition smooth and predictable. This periodic rotation approach balances the need for responsive motion tracking with the need to minimize user discomfort.
Data Source
AI summary
A wearable display apparatus is provided. The wearable display apparatus according to an embodiment includes a display, a sensor configured to detect motion of the wearable display apparatus and output motion data corresponding to the motion of the wearable display apparatus, the output motion data including a non-zero roll component, and a processor configured to obtain three-dimensional (3D) image data, obtain the output motion data from the sensor, generate a first virtual reality (VR) 3D image based on the obtained 3D image data and a portion of the obtained motion data excluding the non-zero roll component, and control the display to display the generated first VR 3D image.