Head-Mounted Display Eye Focus Control for Power and Visibility
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Solution Overview
Problem
Head-mounted electronic devices, such as augmented reality (AR) apparatuses, face challenges with high power consumption and heat dissipation, particularly affecting the visibility of real-world scenes when a bright background image is displayed, making it difficult for users to see behind the image clearly.
Innovation Solution
A method is introduced where the display screen of a head-mounted electronic device is controlled based on the user's eye focus, turning off the screen when the eye focus is not within a certain range for a predetermined duration, thereby reducing power consumption and minimizing the impact of the displayed image on real-world visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display screen is kept on to display images, then the user can interact with virtual images, but power consumption and heat dissipation increase
Solution Approach 1:
The display screen transitions from a static on/off state to a dynamic state that adapts to user needs. The system continuously monitors eye focus distance and adjusts display screen status accordingly, enabling the display to be on when virtual interaction is needed and off when real-world viewing is prioritized, thus resolving the contradiction between versatility and energy consumption
Solution Approach 2:
The system implements a feedback mechanism by detecting the user's eye focus distance and using this information to control the display screen state. The detection module provides real-time feedback about user attention, and the control module responds by adjusting the display screen status, creating a closed-loop system that optimizes power consumption based on actual usage patterns
2Illumination intensity
If the display screen displays bright images, then the virtual image is visible, but the real world behind the image becomes difficult to see clearly
Solution Approach 1:
The display screen's transparency is dynamically adjusted based on eye focus detection. When the system detects that the user is looking at real-world objects (eye focus distance exceeds threshold), the display screen transitions to a transparent state, allowing clear viewing of the real world. When virtual interaction is detected, the display becomes opaque to show bright images, thus dynamically resolving the contradiction between image brightness and real-world visibility
Solution Approach 2:
The display screen utilizes transparency changes (a form of optical property change) to switch between displaying bright virtual images and allowing clear real-world viewing. When the display is in transparent mode, it appears as if the screen is invisible, permitting unobstructed viewing of the real world, while in opaque mode it displays bright virtual content, effectively managing the trade-off between illumination intensity and real-world visibility
3Use of energy by moving object
If the display screen is turned off to save power, then power consumption is reduced, but the user cannot interact with virtual images
Solution Approach 1:
The system uses eye focus detection feedback to intelligently control display screen power state. By continuously monitoring whether the user's eye focus distance is within the threshold range, the system determines when virtual interaction is needed and maintains display power only during these periods, automatically powering down the display when real-world viewing is detected, thus resolving the contradiction between power savings and interaction capability
Solution Approach 2:
The system enables the display screen to serve itself by using eye focus detection to automatically determine when power is needed. The detection module and control module work together to ensure the display is powered only when the user needs to interact with virtual images, eliminating the need for manual user input while optimizing power consumption based on actual usage patterns
Data Source
AI summary
A method for controlling a display screen according to an eye focus and a head-mounted electronic device are provided. The method is applicable to the head-mounted electronic device, the head-mounted electronic device includes a display screen, and the display screen is transparent when display is turned off. Furthermore, the method can include displaying an image on the display screen, an eye focus of a user being within a first distance range. The method can further include turning off the display screen, when it is detected that a duration in which the eye focus of the user is not within the first distance range is greater than or equal to a first duration. The method can lower power consumption, and reduce impact of an image on watching a real world.