Inertial Coordinate System for Virtual Object Display in HMDs
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Solution Overview
Problem
Existing virtual object display techniques using world and local coordinate systems face challenges in maintaining visibility of virtual objects as the user moves, leading to reduced external field visibility and limited virtual object arrangement capabilities.
Innovation Solution
A virtual object display device that incorporates an inertial coordinate system, where the coordinate origin follows the movement of the HMD in the real world, and the effective field of view is rotated according to the HMD's rotation, allowing for dynamic arrangement and display of virtual objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If virtual objects are arranged in the world coordinate system, then many virtual objects can be arranged, but the user cannot view the virtual object once leaving the place
Solution Approach 1:
The patent introduces a third coordinate system (user-centered coordinate system) that dynamically adapts to user movement and orientation. This coordinate system moves and rotates with the user, allowing virtual objects to remain visible in the user's field of view while maintaining the ability to arrange many virtual objects in the world coordinate system. The system dynamically switches between coordinate systems based on user needs.
2Ease of operation
If virtual objects are arranged in the local coordinate system, then the display keeps displaying the virtual object when the user moves, but the number of virtual objects to be arranged is limited
Solution Approach 1:
The patent introduces a third coordinate system (user-centered coordinate system) that dynamically adapts to user movement and orientation. This coordinate system moves and rotates with the user, allowing virtual objects to remain visible in the user's field of view while maintaining the ability to arrange many virtual objects in the world coordinate system. The system dynamically switches between coordinate systems based on user needs.
3Ease of operation
If virtual objects are forcibly arranged in the direction in which the display surface exists, then the user can access the virtual object, but the visibility of the external field is reduced
Solution Approach 1:
The patent introduces a third coordinate system (user-centered coordinate system) that dynamically adapts to user movement and orientation. This coordinate system moves and rotates with the user, allowing virtual objects to remain visible in the user's field of view while maintaining the ability to arrange many virtual objects in the world coordinate system. The system dynamically switches between coordinate systems based on user needs.
Data Source
AI summary
A virtual object display device comprises a display and a display control device configured to perform display control of the display. The display control device includes: a coordinate system calculation unit configured to detect movement and rotation of the virtual object display device in a real world, and use an inertial coordinate system in which a coordinate origin thereof follows the movement of the virtual object display device and an effective field of view of the display is rotated therein in accordance with the rotation of the virtual object display device so as to define an arrangement position of an inertial coordinate system virtual object; and a display control unit configured to, when the inertial coordinate system virtual object is included in the effective field of view of the display, display the inertial coordinate system virtual object within the effective field of view.