Headset Light Seal Fabric Structure for Light Blocking and Comfort
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Solution Overview
Problem
Conventional head-mounted devices are uncomfortable and cumbersome due to inadequate light sealing, leading to unsatisfactory viewing experiences.
Innovation Solution
A head-mounted device with a light seal comprising inner and outer fabric layers, where the inner layer is a light-blocking fabric with a dark-colored weft knit layer facing the eye box and a light-colored weft knit layer facing the seamless tube of knit fabric, ensuring opacity without visibility through the outer layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light seal is added to block outside light, then viewing quality is improved, but device complexity and comfort are worsened
Solution Approach 1:
The patent applies flexible fabric layers to create the light seal. The outer fabric layer and inner fabric layer are flexible, thin film structures that block outside light while conforming to the user's face, avoiding the need for rigid light-blocking structures that would increase device complexity and discomfort.
Solution Approach 2:
The patent transitions from conventional rigid light seals to a multi-layer fabric construction with outer and inner layers separated by a spacer layer. This dimensional approach creates effective light blocking through layered architecture rather than single thick structures, improving viewing quality without excessive complexity.
2Illumination intensity
If a dark-colored inner fabric layer is used to block light, then light blocking is improved, but appearance is worsened due to visibility through the outer fabric
Solution Approach 1:
The patent applies different color properties to different layers: the inner fabric layer facing the eye box is dark-colored for optimal light blocking, while the outer fabric layer is light-colored for aesthetic appearance. This local differentiation of properties resolves the contradiction between light blocking performance and visual appeal.
Solution Approach 2:
The patent uses a composite fabric structure with an outer fabric layer, an inner fabric layer, and a spacer layer joining them. This composite construction combines the light-blocking properties of dark fabric with the aesthetic properties of light fabric, achieving both light blocking and desirable appearance.
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 effective light blocking, enhancing user comfort and improving the viewing experience by preventing external light from entering the viewing area.
Implementation Method 1
The dark-colored weft knit layer may ensure sufficient opacity without being visible through the seamless tube of knit fabric
Implementation Method 2
The light-colored weft knit layer may match a color of the seamless tube of knit fabric. The dark-colored weft knit layer may ensure sufficient opacity without being visible through the seamless tube of knit fabric
Data Source
AI summary
A head-mounted device may include a housing with a display that displays images that are viewable from an eye box. A light seal may be coupled the housing and may block outside light from reaching the eye box. The light seal may include a seamless tube of knit fabric that forms an outermost layer of the light seal. A light-blocking fabric may line the inner surface of the seamless tube of knit fabric. The light-blocking fabric may include a dark-colored weft knit layer facing the eye box, a light-colored weft knit layer facing and matching a color of the seamless tube of knit fabric, and a middle layer joining the light-colored weft knit layer and the dark-colored weft knit layer. The dark-colored weft knit layer may ensure sufficient opacity without being visible through the seamless tube of knit fabric.