HMD Band Adjustment and Eyeball Tracking for VR
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Solution Overview
Problem
Users of Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR) devices face inconvenience due to the need to use a separate controller for manipulating cursors, which complicates fixing the HMD to their head.
Innovation Solution
An electronic device with a display unit and a band that adjusts its length based on pressure sensors to ensure proper fit on the user's head, and includes sensors to track eyeball movement for cursor control without a separate controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate controller is used to manipulate the cursor, then the HMD can be fixed to the user's head, but the user experiences inconvenience and difficulty in manipulation
Solution Approach 1:
The patent combines the cursor manipulation function directly into the HMD device by integrating sensors (accelerometer, gyroscope, magnetometer) and a display unit that responds to user head movements. This merging eliminates the need for a separate controller, allowing users to manipulate cursors naturally by moving their heads while the HMD remains securely fixed.
Solution Approach 2:
The HMD device performs cursor manipulation autonomously by detecting user head movements through integrated sensors and automatically translating these movements into cursor control actions. The system serves itself by using the user's natural head motion as input, eliminating the need for manual controller operation.
2Reliability
If the HMD is fixed securely to the user's head, then the device remains stable, but the user cannot easily adjust the band length
Solution Approach 1:
The patent implements a dynamic band adjustment mechanism that allows the band length to be easily modified. The band includes a movable portion that can be adjusted by the user through simple operations such as pulling or releasing the band, enabling quick adaptation to different head sizes while maintaining secure fixation when properly adjusted.
3Ease of operation
If multiple sensors are integrated into the HMD for cursor control, then hands-free operation is achieved, but the device complexity increases
Solution Approach 1:
The patent employs a set of universal sensors (accelerometer, gyroscope, magnetometer) that serve multiple functions: they detect head movements for cursor control, track user gaze direction, and potentially monitor device orientation and position. This multi-functionality reduces the need for separate specialized sensors, managing complexity while enabling hands-free operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances user experience by allowing hands-free adjustment of the HMD and intuitive cursor control through eyeball movement, improving convenience and immersion in VR, AR, and MR environments.
Implementation Method 1
a sensing unit configured to sense whether the face comes into contact with the face contact unit
Data Source
AI summary
Provided is an electronic device. The electronic device according to the present disclosure can adjust the length of a band surrounding a user's head, by sensing pressure of a part of the electronic device coming into contact with the user. Furthermore, the electronic device according to the invention can identify a direction in which the user's eyeball looks, and deduce the user's facial expression, by sensing the movement of muscle around the user's eyeball. The electronic device of the invention can be associated with artificial intelligence modules, robots, augmented reality (AR) devices, virtual reality (VR) devices, devices related to 5G service, etc.