Flip-Up Display Mechanism for Mixed Reality Mode Switching
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Solution Overview
Problem
Current head-mounted display devices lack the ability to switch seamlessly between different display modes, such as mixed reality, augmented reality, and see-through modes, limiting user flexibility in viewing virtual, augmented, and real-world content simultaneously.
Innovation Solution
A head-mounted display device with a flip-up display mechanism that moves between multiple positions, allowing the user to switch between opaque and see-through modes by positioning the display either in front of the optical axis or away from it, enabling the combination of virtual/augmented reality content with ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the display is positioned in front of the optical axis to provide virtual/augmented reality content, then the display functionality is improved, but the ability to view the external environment is blocked
Solution Approach 1:
The display is made movable between different positions relative to the optical axis. When positioned in front of the optical axis, the display provides virtual/augmented reality content. When moved away from the optical axis, the display allows users to view the external environment through the optical assembly. This dynamic repositioning enables the system to adapt between different viewing modes as needed.
2Reliability
If the display blocks the optical axis to provide immersive virtual reality content, then the virtual reality experience is improved, but the see-through capability is lost
Solution Approach 1:
The display position is dynamically adjusted relative to the optical axis. In virtual reality mode, the display is positioned in front of the optical axis to provide immersive content. When see-through mode is needed, the display is moved away from the optical axis, allowing ambient light to pass through the optical assembly to the user's eyes. This dynamic positioning enables reliable switching between immersive VR and see-through modes.
3Device complexity
If the display is fixed in position to simplify the device structure, then the device complexity is reduced, but the ability to switch between display modes is lost
Solution Approach 1:
Rather than fixing the display in a single position, the invention implements a movable display mechanism that can adjust the display's position relative to the optical axis. This dynamic configuration, while adding some structural complexity, enables the system to switch between multiple display modes (virtual reality, augmented reality, and see-through modes) by repositioning the display, thereby achieving adaptability.
4Adaptability or versatility
If the display is moved away from the optical axis to enable see-through mode, then the viewing flexibility is improved, but the virtual/augmented reality content delivery is affected
Solution Approach 1:
The display position is dynamically controlled based on the desired viewing mode. When virtual/augmented reality content needs to be delivered, the display is positioned in front of the optical axis to ensure proper light path alignment and content delivery quality. When see-through mode is required, the display is moved away from the optical axis to maximize ambient light transmission. This dynamic positioning ensures reliable content delivery when in VR/AR mode while maintaining viewing flexibility.
Data Source
AI summary
A display device includes a display, an optical assembly, and a display-moving assembly connected to the display for moving the display between a first position and a second position. When in the first position, the display outputs image light in a first direction substantially parallel to an optical axis of the optical assembly. When in the second position, the display is positioned away from the optical axis of the optical assembly. The display device also includes a partial reflector and a partial reflector-moving assembly connected to the partial reflector for moving the partial reflector between a third position and a fourth position. When the partial reflector is in the third position, the display is in the first position and the display is disposed between the optical assembly and the partial reflector. When the partial reflector is in the fourth position, the display is in the second position.