Glass-Type HMD Barrel Adjustment and Ventilation
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Solution Overview
Problem
Head-mounted displays (HMDs) are not appropriately configured for user usage, leading to issues with portability, weight, and conspicuousness in public spaces, and they fail to maintain proper image alignment due to non-parallel barrel axes and potential fogging from humidity.
Innovation Solution
A glass-type HMD with two barrel-shaped housings that allow for adjustable relative positioning of lens barrels to align with the user's pupils, incorporating a support member for sliding and rotational inhibition, and ventilation paths to prevent fogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If head mounted display devices are configured with traditional structures, then display functionality is achieved, but portability and usability are compromised due to weight and conspicuousness
Solution Approach 1:
The display device is divided into two separate lens barrels (first lens barrel and second lens barrel) that can be independently positioned and adjusted. Each barrel contains its own display device and optical system, allowing the overall weight to be distributed across different locations rather than concentrated in one heavy unit, thereby improving portability and comfort.
Solution Approach 2:
The support member is designed to allow the lens barrels to move relative to each other in the arrangement direction, enabling dynamic adjustment of the distance between the barrels. This dynamic positioning capability allows the device to adapt to different user anatomies and usage conditions, significantly improving usability and comfort.
2Ease of operation
If lens barrels are fixed in position, then structural stability is maintained, but image alignment with user pupils cannot be adjusted
Solution Approach 1:
The support member enables dynamic adjustment of the relative position between the first and second lens barrels along the arrangement direction. This allows the distance between barrels to be changed to match the user's pupil separation, ensuring proper image alignment while maintaining the parallelism of the barrel axes through constrained movement.
Solution Approach 2:
The adjustment mechanism is localized to the support member that connects the two lens barrels. By providing adjustment capability only where needed (in the arrangement direction between barrels) while maintaining fixed positioning in other directions, the design achieves image alignment without compromising the overall structural stability and barrel axis parallelism.
3Volume of moving object
If lens barrels are closely positioned, then device compactness is improved, but fogging occurs due to humidity accumulation
Solution Approach 1:
A ventilation path is introduced as an intermediary channel between the first and second lens barrels. This pathway allows humid air to circulate and escape, preventing fogging while maintaining compact positioning of the barrels. The ventilation path acts as a mediator that resolves the conflict between close positioning and humidity management.
4Measurement precision
If multiple sound pickup devices are distributed across lens barrels and temple parts, then spatial audio detection is enhanced, but device complexity increases
Solution Approach 1:
The sound pickup system is segmented into multiple independent devices distributed across different locations: four devices in the lens barrels and two devices in the temple parts. This segmentation enables precise spatial audio detection by capturing sound from multiple positions, with each device contributing to the overall spatial awareness without requiring a complex centralized system.
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
The configuration enhances usability, reduces conspicuousness, maintains image alignment, and prevents fogging, providing a more appropriate and functional HMD design.
Implementation Method 1
a support member that is elongated in an arrangement direction in which the first lens barrel and the second lens barrel are arranged, and that, by passing through the first lens barrel and the second lens barrel in the arrangement direction, supports at least one of the first lens barrel or the second lens barrel to allow the at least one of the first lens barrel or the second lens barrel to move in the arrangement direction
Implementation Method 2
the first lens barrel includes a first sound pickup device and a second sound pickup device each of which detects an ultrasound, the second lens barrel includes a third sound pickup device and a fourth sound pickup device each of which detects an ultrasound, and the temple parts respectively include a fifth sound pickup device and a sixth sound pickup device each of which detects an ultrasound
Data Source
AI summary
A display apparatus includes: a first lens barrel in a bottomed barrel shape and including, at the bottom, a first display that displays an image; a second lens barrel in a bottomed barrel shape and including, at the bottom, a second display that displays another image; a support member elongated in an arrangement direction of the first and second lens barrels, and supporting, by passing through the first and second lens barrels in the arrangement direction, at least one of the first and second lens barrels to allow the at least one lens barrel to move in the arrangement direction; and temple parts respectively connected to two ends of the support member in the arrangement direction. The first lens barrel includes first and second sound pickup devices, the second lens barrel includes third and fourth sound pickup devices, and the temple parts respectively include fifth and sixth sound pickup devices.