AR Display Position Synchronization for Multi-User HMDs
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Solution Overview
Problem
Existing augmented reality technologies face challenges in presenting unified and realistic images to multiple users simultaneously, leading to a less immersive experience due to the lack of synchronization in displaying virtual or augmented reality images across head-mounted display (HMD) devices.
Innovation Solution
An HMD device equipped with location sensors, a communication unit, and a processor that determines a field of view and display position for augmented reality images, allowing multiple HMD devices to synchronize the display of images in a physical environment, ensuring a realistic and cooperative experience among users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If augmented reality images are displayed to multiple users simultaneously using HMD devices, then the quantity of users experiencing AR is increased, but the images appear less realistic due to lack of unification
Solution Approach 1:
The patent merges the AR image display positions across multiple HMD devices by calculating a common display position that is visible to all users. The processor determines peer location data from other HMD devices and identifies a unified display position in the physical environment where the AR image can be viewed by all participants, thereby maintaining image realism while supporting multiple users.
Solution Approach 2:
The patent introduces peer location data as an intermediary element that mediates between multiple HMD devices. By receiving and processing location data from peer devices, the system establishes a common reference frame for determining the unified AR image display position, enabling coordinated multi-user experience without direct device-to-device synchronization.
2Reliability
If a common display position is determined for multiple HMD devices, then the unification and realism of images is improved, but the device complexity increases due to location sensing and communication requirements
Solution Approach 1:
The HMD device is designed with multi-functionality, where the same location sensors and processing unit used for basic AR display are also utilized for determining peer location data and calculating common display positions. This universal approach allows the device to handle multiple functions (AR rendering, location tracking, peer coordination) without proportionally increasing complexity.
Solution Approach 2:
Each HMD device independently determines the common AR image display position by receiving peer location data and performing calculations locally. Rather than requiring a centralized server to coordinate all devices, each device serves itself by autonomously computing the unified display position based on its own location and received peer data, reducing overall system complexity.
Data Source
AI summary
A head-mounted display (HMD) device may include an at least partially see-through display, one or more location sensors, a communication unit, and a processor. The HMD device may determine at least a location of the one or more location sensors in a physical environment. The communication unit may receive peer location data from at least one peer HMD device in the physical environment. The processor of the HMD device may determine a field of view of the HMD device, identify a display position at which the augmented reality image can be displayed and viewed in the physical environment by the HMD device and the at least one peer HMD device, and display the augmented reality image at the display position on the at least partially see-through display of the HMD device.