Light-Blocking Cover for Head-Mounted Displays
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Solution Overview
Problem
Conventional head-mounted devices are uncomfortable to wear and fail to effectively block outside light from leaking into the device, compromising the viewing experience.
Innovation Solution
A light-blocking cover with a stretchable fabric outer layer and a light-blocking inner layer, featuring slack that allows for expansion and retraction without compromising opacity, is integrated around the periphery of the main housing portion and between the main and temple housing portions, with elastic or heat-set properties to ensure the slack returns to its retracted state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigid light-blocking cover is used to prevent light leakage, then light blocking effectiveness is improved, but device comfort and adaptability to head movements deteriorate
Solution Approach 1:
The light-blocking cover is constructed from flexible fabric layers that can stretch and conform to head movements while maintaining light-blocking effectiveness. The fabric material allows the cover to adapt to different head shapes and movements without compromising its light-blocking function.
Solution Approach 2:
The light-blocking cover transitions from a static rigid structure to a dynamic flexible structure that can move and adapt with head movements. The fabric layers are designed to stretch and retract dynamically, maintaining light blocking while accommodating the natural movement of the user's head.
2Adaptability or versatility
If a stretchable fabric cover is used to improve comfort and adaptability, then adaptability to head movements is improved, but light blocking effectiveness deteriorates
Solution Approach 1:
The light-blocking cover uses composite material construction with multiple fabric layers including light-blocking inner layers and outer layers. This composite structure maintains light-blocking effectiveness while providing the stretchability and flexibility needed for comfort and adaptability to head movements.
Solution Approach 2:
The cover employs a nested multi-layer fabric structure where light-blocking inner layers are positioned within outer fabric layers. This nested arrangement ensures that the light-blocking function is maintained while the outer layers provide stretchability and comfort.
3Object-affected harmful factors
If the light-blocking cover is made taut to maintain opacity, then light blocking effectiveness is improved, but comfort and accommodation of movement deteriorate
Solution Approach 1:
The flexible fabric construction allows the cover to maintain opacity and light-blocking effectiveness without requiring a taut rigid structure. The fabric's inherent flexibility provides comfort while maintaining its light-blocking function through proper layer arrangement and material selection.
4Ease of operation
If the light-blocking cover is made loose to improve comfort, then comfort is improved, but light blocking effectiveness deteriorates
Solution Approach 1:
The composite multi-layer fabric structure maintains light-blocking effectiveness even in a loose, comfortable configuration. The combination of light-blocking inner layers and outer layers ensures that opacity is preserved regardless of how loosely the cover is fitted, providing both comfort and effective light blocking.
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 solution provides enhanced comfort and effective light blocking, accommodating movement of the device while maintaining opacity, thereby improving the overall user experience by preventing outside light from entering the viewing area.
Implementation Method 1
The slack may be heat-set, molded, or covered with a layer of elastic so that the slack returns to the original retracted state after being expanded.
Implementation Method 2
The slack may be heat-set, molded, or covered with a layer of elastic so that the slack returns to the original retracted state after being expanded.
Data Source
AI summary
A head-mounted device may include a main housing portion and a temple housing portion. Displays in the main housing portion may be configured to present images that are viewable from eye boxes. A light-blocking cover may extend between the main housing portion and the temple housing portion and may be configured to prevent outside light from reaching the eye boxes. The light-blocking cover may have a stretchable outer fabric layer and an inner light-blocking layer formed from fabric or other suitable materials. The light-blocking cover may include slack in the inner light-blocking layer so that the inner light-blocking layer can accommodate movement of the main housing portion relative to the temple housing portion without sacrificing opacity. The slack may be heat-set, molded, or covered with a layer of elastic so that the slack returns to a retracted state within the temple housing portion after being expanded.