AR Device Reflector Positioning for Thin Profile and Wide FOV
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Solution Overview
Problem
Current augmented reality (AR) devices face limitations in achieving a thin thickness and wide field of view (FOV), with existing devices often having a narrow FOV and increased size due to the need for internal lens focal distance, restricting their application and user experience.
Innovation Solution
The AR device incorporates a display unit, a reflector that reflects the augmented image, and an augmentation unit that displays the reflected image alongside the real image, with the display unit positioned above the user's viewing angle and the reflector's lower corner adjacent to the user's front surface, allowing the augmented image to be reflected and overlapped with the real image within the user's viewing range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If an AR device is implemented with a conventional display configuration, then the device can display augmented images, but the device thickness increases and the field of view becomes narrow
Solution Approach 1:
The patent positions the display unit at the upper boundary of the front viewing angle range rather than directly in front of the user, utilizing the vertical dimension of the viewing angle space. This dimensional repositioning allows the augmented image to be reflected into the user's field of view without requiring the display unit to be centrally located, thereby reducing device thickness while maintaining a wide field of view
Solution Approach 2:
The patent introduces a reflector as an intermediary element between the display unit and the user's eyes. The reflector receives the augmented image from the display unit positioned above the viewing angle range and reflects it into the user's field of view. This intermediary mechanism enables the display unit to be positioned outside the conventional viewing zone, reducing device thickness while preserving a wide field of view
2Ease of operation
If an AR device uses internal lens configuration to form focal point, then virtual reality can be realized, but the device size increases due to focal distance requirements
Solution Approach 1:
The patent extracts the focal point formation function from the device interior by positioning the display unit at the upper boundary of the front viewing angle range. Instead of requiring internal lenses to create a focal point at a specific distance from the user's eyes, the system uses the spatial arrangement of the display unit and reflector to achieve proper image focus, thereby eliminating the need for large internal lens structures and reducing overall device volume
Solution Approach 2:
The patent repositions the display unit from the conventional horizontal plane directly in front of the user to the vertical dimension at the upper boundary of the viewing angle range. This dimensional change allows the system to achieve proper focal point formation without requiring the horizontal space needed for internal lenses, thus reducing device size while maintaining virtual reality capability
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
This configuration reduces the device thickness and enhances the field of view, providing an unobstructed and seamless overlap of augmented and real images, improving user experience and device usability.
Implementation Method 1
a reflector that reflects the augmented image displayed by the display unit
Data Source
AI summary
Disclosed is an AR device which has a thin thickness and a wide FOV and displays an image obtained by mixing a virtual object with the real world. The AR device includes a display unit displaying an augmented image, a reflector reflecting the augmented image displayed by the display unit, and an augmentation unit displaying the augmented image reflected by the reflector along with a real image. The display unit is disposed in an upper boundary of a front viewing angle range of a user, the reflector is disposed at a first angle with respect to the display unit, and the augmentation unit is disposed within the front viewing angle range of the user.