Head-Mounted Display FOV Control for Mobile Screen Visibility
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Solution Overview
Problem
Existing head-mounted display (HMD) systems display the mobile information terminal's screen unnecessarily, causing inconvenience when not demanded by the user.
Innovation Solution
A head-mounted display system that includes a field of view detection sensor to determine if the mobile information terminal is within the user's field of view, controlling display of the terminal's application screen accordingly, displaying it when not in view and hiding it when in view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the HMD displays the mobile information terminal's screen upon link establishment, then the display function is improved, but unnecessary screen display occurs causing inconvenience
Solution Approach 1:
The patent applies dynamics by making the display state changeable based on user behavior. The display switches between displaying and non-displaying states according to whether the terminal is detected in the field of view, creating a dynamic adaptation to user needs rather than a static always-on approach.
Solution Approach 2:
The patent implements feedback through the field of view detection mechanism. The system continuously monitors whether the terminal is in the user's field of view and uses this information to control display behavior, creating a closed-loop system that adapts to user attention and reduces unnecessary displays.
2Loss of information
If the HMD continuously displays the terminal screen, then information availability is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by intermittently displaying information based on detection cycles. Instead of continuous display, the system periodically checks field of view status and updates display state accordingly, reducing energy consumption while maintaining information availability when needed.
Solution Approach 2:
The display system dynamically adjusts its operation based on real-time detection results, switching between active display and power-saving states. This dynamic behavior reduces overall energy consumption while ensuring information is available when the user actually needs it.
3Ease of operation
If the HMD displays the application screen when the terminal is not in field of view, then user convenience is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary detection mechanism (field of view sensor) that mediates between the user's visual attention and the display system. This intermediary component automatically determines when display is needed, simplifying the user experience while managing the complexity through automated detection rather than manual control.
Solution Approach 2:
The system performs self-service by automatically detecting field of view status and controlling display behavior without user intervention. The detection and control system manages itself based on predefined criteria, reducing the need for complex user interfaces or manual adjustments.
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
Enables timely and user-friendly display of the mobile information terminal's screen on the HMD, improving operability and reducing unnecessary screen display.
Implementation Method 1
a field of view detection sensor configured to output status data used for determining whether the mobile information terminal is included in a field of view of the user through the wearing body
Data Source
AI summary
A head-mounted display comprises: a wearing body; a display; a communication module configured to perform communication connection with a mobile information terminal; a field of view (FOV) sensor configured to output status data used for determining whether the mobile information terminal is included in a user's FOV through the wearing body; and a controller connected to each of the display, the communication module, and the FOV detection sensor. The controller determines whether the mobile information terminal is included in the user's FOV based on the status data, and performs display control with respect to the display so as to display an application screen of the mobile information terminal on the display when determining that the mobile information terminal is not included in the FOV, and not to display the application screen on the display when determining that the mobile information terminal is included in the FOV.