Head-Mounted Display Frame Segmentation for Convergence Stability
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Solution Overview
Problem
Head-mounted displays face issues with maintaining a predetermined convergence angle and strength due to external forces and deformation caused by temple extension, leading to inconsistent image recognition.
Innovation Solution
A head-mounted display design featuring a first frame with a fixing part at its central horizontal direction, a second frame fixed to the first frame with a gap, and protective cases covering the image generators, distributing weight evenly and reducing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the optical plate is attached to the front part of the spectacle-shaped frame, then the display structure is compact and integrated, but the optical plate is exposed to external forces from the front that can change the convergence angle
Solution Approach 1:
The frame is divided into a first frame (holding the optical plate) and a second frame (spectacle-shaped frame), which are fixed to each other at the central part. This segmentation isolates the optical plate from direct external forces while maintaining structural integration through the fixed connection between frames.
2Ease of operation
If the temples extend to the right and left when worn, then the head-mounted display can be comfortably worn on the user's head, but the front part is distorted and the optical plate is deformed, changing the convergence angle
Solution Approach 1:
By separating the optical plate holding function (first frame) from the wearing structure (second frame with temples), the patent prevents deformation transmission. The fixed connection at the central part allows the temples to extend for comfort without distorting the optical plate's convergence angle.
3Device complexity
If the optical plate is positioned to be exposed in front of the head, then the display structure is simplified, but external force is likely to be applied to the optical plate and frame, potentially changing the convergence angle
Solution Approach 1:
The patent segments the structure so that the optical plate is held by the first frame, which is fixed to the second frame at the central part. This arrangement protects the optical plate from direct external forces while maintaining a relatively simple overall display structure.
4Reliability
If the second frame is fixed to the first frame with a gap at portions other than the to-be-fixed part, then external force applied to the second frame is less likely to be transmitted to the first frame, but the fixing structure becomes more complex
Solution Approach 1:
The patent applies local quality by creating a gap between the first and second frames at portions other than the to-be-fixed part. This localized gap design isolates external forces while maintaining a relatively simple fixing structure at the central connection point.
Data Source
AI summary
There is provided a head-mounted display comprising an image generator that generates an image, a pair of optical plates to be arranged in front of both eyes of an observer who observes the image, the pair of optical plates causing the image to be displayed, a first frame that holds the pair of optical plates, and a second frame including a to-be-fixed part, in which a fixing part to which the to-be-fixed part is fixed is provided at the central part of the first frame in the horizontal direction.