Head-Mounted Display IPD Status Reporting
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Solution Overview
Problem
Existing extended reality systems, such as head-mounted displays, face challenges in providing accurate interpupillary distance (IPD) calibration, leading to a reduced user experience due to incorrect IPD settings, especially when the host computing device connection is lost or different content providers offer varying IPD reporting systems, resulting in inconsistent and incomplete visual feedback to users.
Innovation Solution
An IPD reporting mechanism is implemented entirely on the head-mounted display (HMD) using low-frequency channels like I2C, allowing for on-screen display of IPD values independently of the connected computing device, with a database storing status messages that can be mapped and displayed on the HMD, ensuring consistent and comprehensive reporting of IPD and other conditions like system overheating, network disconnection, or low battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IPD reporting is implemented on the host computing device, then IPD information can be provided to users, but the system becomes dependent on host device connection and different content providers offer varying reporting systems
Solution Approach 1:
The HMD device performs IPD reporting independently using its own display resources and processing capabilities. The device stores status messages in local memory and presents them through its native display system, eliminating dependency on host computing devices or external content providers for IPD information delivery.
Solution Approach 2:
The patent introduces an intermediary layer consisting of status message databases and image processing circuits within the HMD that translate and standardize IPD information regardless of the source. This intermediary system ensures consistent presentation format and reliability across different content providers and host devices.
2Measurement precision
If IPD status messages are displayed on the HMD, then users receive accurate IPD feedback, but the HMD must independently store and process status messages
Solution Approach 1:
Status messages related to IPD and other device conditions are pre-stored in the HMD's memory device in a database structure. This preliminary preparation allows the image processing circuit to quickly retrieve and display appropriate status messages without requiring complex real-time processing or external communication during operation.
Solution Approach 2:
The status message system is segmented into discrete, pre-defined messages stored in database records. Each message corresponds to specific device conditions (IPD values, temperature states, battery levels), allowing the system to handle multiple conditions independently through simple lookup and display operations rather than complex integrated processing.
3Loss of information
If the HMD independently presents status messages, then reporting is comprehensive and consistent, but memory and processing resources on the HMD are utilized
Solution Approach 1:
The patent uses a memory device with database records that store status messages in a lightweight, efficient format. Rather than implementing complex real-time monitoring and generation systems, the HMD uses pre-prepared status message templates that consume minimal memory resources while providing comprehensive information coverage.
Data Source
AI summary
In an example in accordance with the present disclosure, a display system is described. The display system includes a head-mounted display device to display visual content on a display panel. An input port receives external visual content to be displayed on the head-mounted display device from a connected computing device. The display system includes an input device on the head-mounted display device to receive input regarding a condition at the head-mounted display device. The display system includes a memory device on the head-mounted display device to store a database which holds a number of status messages related to a detected condition at the head-mounted display device. The display system also includes an image processing integrated circuit on the head-mounted display device to present the status messages on the head-mounted display device.