Movable Optical Assembly in Hat Brim AR Display
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Solution Overview
Problem
Current head-mounted display apparatus for Augmented Reality (AR) often provides images that are too small or not aligned with the user's eyes, leading to discomfort and reduced willingness to use the device.
Innovation Solution
A head-mounted display apparatus with a movable optical assembly and adjustable lens system, integrated into a hat brim structure, allowing users to align the display images with their eyes, featuring a display screen, frame body, separation plate, and transparent area for optimal light transmission and image adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display image is positioned close to the user's eyes, then the field of view is improved, but the image size becomes too small and uncomfortable to view
Solution Approach 1:
The optical assembly is made movable relative to the display screen, allowing dynamic adjustment of the optical path length. This enables the system to adapt between providing a large field of view (when optical assembly is closer to eyes) and maintaining comfortable image size (when optical assembly is farther from eyes), resolving the contradiction between field of view and image size.
2Manufacturing precision
If the display image is positioned far from the user's eyes, then the image size is improved, but the alignment with user's eyes becomes difficult and uncomfortable
Solution Approach 1:
The movable optical assembly allows users to dynamically adjust its position to achieve proper alignment with their eyes. This dynamic adjustment capability enables the system to maintain comfortable eye alignment while preserving adequate image size, resolving the contradiction between image size and ease of eye alignment.
3Device complexity
If the optical assembly is fixed, then the device complexity is reduced, but the adaptability to different user eye positions is worsened
Solution Approach 1:
The optical assembly is designed with movable capability (sliding or pivoting mechanisms) while maintaining relatively simple structural implementation. This allows the system to adapt to different user eye positions and viewing preferences without significantly increasing device complexity, resolving the contradiction between structural simplicity and adaptability.
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 users to comfortably view images by adjusting the optical assembly to align with their eyes, increasing user satisfaction and willingness to use the apparatus.
Implementation Method 1
optically coupled to the optical assembly for transmitting lights of the display screen to the optical assembly
Implementation Method 2
The lens is equipped in the loading frame. The lens for image enlargement, or a lens for providing upright virtual images
Data Source
AI summary
A head-mounted display apparatus includes a wearing device, a display-source arrangement portion and an optical assembly. The wearing device has a head-wearing portion and a hat brim portion connected to the head-wearing portion. The display-source arrangement portion is connected with the hat brim portion. The optical assembly is movably disposed on the hat brim portion, and arranged between the head-wearing portion and the display-source arrangement portion.