Bendable Head-Mounted Display Frames With Spring Hinges
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Solution Overview
Problem
Head-mounted devices with display systems for providing images to eye boxes often face alignment issues due to the bending of the support structure when worn, leading to image misalignment and discomfort for the user.
Innovation Solution
The head-mounted device is designed with a support structure that flexes by a predetermined amount when worn, utilizing spring hinges to maintain a constant bending force, ensuring that the display systems' images are aligned with the eye boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the head-mounted device uses a rigid support structure, then the device maintains structural stability, but the images from the display systems become misaligned with the eye boxes when the device is worn
Solution Approach 1:
The support structure is designed to be flexible rather than rigid, allowing it to dynamically adjust its shape when the device is worn. The frame bends to conform to the user's head, and the spring hinges enable angular adjustment, transforming the static rigid structure into a dynamic adaptive one that maintains both stability and alignment precision.
Solution Approach 2:
The patent changes the physical parameters of the support structure by introducing flexibility through specific materials and spring mechanisms. The frame's bending capability and the hinge's angular adjustment allow the device to change its geometric parameters when worn, ensuring that the display systems remain aligned with the eye boxes despite the structural deformation.
2Manufacturing precision
If the frame is made flexible to accommodate head bending, then image alignment is maintained, but the device complexity increases due to spring hinges and bending mechanisms
Solution Approach 1:
The patent employs flexible elements such as spring hinges and a bendable frame structure that can flex to accommodate head movement. These flexible components are integrated into the support structure, allowing the device to maintain image alignment without requiring complex active control systems or multiple adjustable parts.
Solution Approach 2:
The spring hinges and flexible frame automatically adjust to maintain proper alignment as the device is worn and the head moves. The elastic properties of the spring hinges provide self-regulating force that keeps the display systems aligned with the eye boxes without requiring external control mechanisms, thereby reducing overall device complexity.
3Adaptability or versatility
If spring hinges are used to supply constant bending force, then the device adapts to different head sizes, but the manufacturing complexity increases
Solution Approach 1:
The spring hinges are designed with specific elastic properties that allow them to supply a constant bending force over a range of angular deflections. This enables the device to adapt to different head sizes and shapes by automatically adjusting the frame's bending degree, while the spring mechanism itself remains a relatively simple mechanical component that can be manufactured using standard processes.
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 ensures satisfactory alignment of images with respect to the eye boxes, enhancing image quality and viewing comfort while maintaining a lightweight and compact device.
Implementation Method 1
Spring hinges or other structures may be used to supply a constant bending force from the temples to the frame over a range of head sizes
Implementation Method 2
The frame may have a nose bridge portion that bends under pressure from a user's head while the glasses are being worn by the user
Data Source
AI summary
A head-mounted device may have a head-mounted support structure. The head-mounted support may support optical systems. The optical systems may be display systems that provide images to eye boxes. A user may view images from the display systems when the user's eyes are located in the eye boxes. The head-mounted support structure is bent due to pressure from a user's head while the head-mounted support structure is being worn by the user. Spring hinges or other structures may be used to supply a constant bending force to the head-mounted support structure over a range of head sizes. When the head-mounted support structure is in an unbent configuration, the images will be misaligned with respect to the eye boxes and each other. When the head-mounted support structure is being worn and the head-mounted support structure is being bent, the images will be aligned satisfactorily.