AR Head-Mounted Display with Polarizing Light Blocking Filter
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Solution Overview
Problem
Existing artificial reality devices struggle to effectively block unwanted light sources and project relevant visual content in real-world environments, such as airports or restaurants, without obstructing the user's view of the surroundings.
Innovation Solution
A head-mounted display equipped with filters, such as polarizing films, to block specific types of light, and a display system that projects visual content onto the lenses at locations corresponding to the blocked light, allowing users to see relevant information while maintaining a view of their surroundings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a filter is used to block unwanted light sources, then the user can see relevant information more clearly, but the view of the real world may be obstructed
Solution Approach 1:
The patent applies different optical properties to different regions of the lens. The filter is configured to block light from specific locations (where unwanted information appears) while allowing light from other locations (the real world view) to pass through. This creates local variations in light transmission properties, enabling selective blocking without overall obstruction.
Solution Approach 2:
The solution segments the lens into multiple functional regions: regions where filters block unwanted light sources and regions where light passes through to maintain the real world view. This spatial segmentation allows simultaneous achievement of information filtering and environmental visibility.
2Loss of information
If visual content is projected onto the lens, then relevant information is provided to the user, but the projection may interfere with the natural light transmission
Solution Approach 1:
The patent projects visual content onto the lens surface, utilizing the lens as a display medium. By projecting images onto the lens rather than using separate display elements, the system adds information in the optical dimension without requiring additional physical space or components that would block light.
Solution Approach 2:
The patent merges the function of the lens (light transmission) with the function of a display (information presentation). The lens serves dual purposes: allowing natural light to pass through while also serving as a projection surface for visual content. This combination eliminates the need for separate display components that would obstruct the view.
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 enables users to selectively block unwanted visual content from light sources and superimpose relevant information, enhancing user experience by providing personalized and context-aware visual information without obstructing the view of the real world.
Implementation Method 1
The filter may be configured to block polarized light incident on the lens
Data Source
AI summary
A head-mounted display includes a filter that at least partially blocks light emitted from a light source. In some examples, the light source may be a liquid crystal display that emits polarized light, and the filter may be a polarizing component. Using the filter, the head-mounted display may filter out the light source directed to the head-mounted display. The filtered out region may appear as a grayscale region or a blacked out region mixed with a real-world environment. When the head-mounted display takes the form of an augmented reality device, the head-mounted display may use a display to project visual content onto the filtered out region, while permitting a view of a real-world environment. The visual content may include images, video(s), and/or text, with the images, video(s), and/or text being relevant to the user.