Adjustable HMD Optics for Eye Box and Pupil Alignment
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Solution Overview
Problem
Head-mounted devices (HMDs) face challenges in accommodating diverse physiological attributes of users, leading to misalignment of the eye box with the wearer's pupil, which degrades the user experience and causes issues like blur, misalignment, and double vision.
Innovation Solution
The HMDs incorporate modular and adjustable components such as contact members, lenses, and light emitters that can be removably coupled or adjusted to align the eye box with the wearer's pupil, including mechanisms for varying the distance and position of lenses and light emitters relative to the user's face.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed positioning of optical components is used, then device structure is simple, but alignment with user's pupil deteriorates for diverse physiological attributes
Solution Approach 1:
The patent implements dynamic adjustment mechanisms that allow the optical components (lens, light emitter) to be repositioned relative to the frame. The contact member can be adjusted to different positions on the nose bridge, and the light emitter can be positioned at different locations on the lens, enabling the system to adapt to diverse user physiological attributes while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent divides the optical assembly into separable modular components: a frame, a contact member, a lens, and a light emitter. Each component can be independently adjusted or replaced, allowing for flexible configuration to accommodate different user faces while keeping individual component designs simple.
2Manufacturing precision
If adjustable components are added to accommodate diverse users, then alignment precision improves, but device complexity increases
Solution Approach 1:
The contact member is designed with adjustability to different positions along the nose bridge, and the light emitter can be positioned at different locations on the lens. This dynamic positioning capability achieves precise alignment for different users without requiring complex mechanical assemblies, using straightforward adjustment mechanisms.
Solution Approach 2:
The frame serves multiple functions: it provides structural support, holds the contact member, and positions the lens and light emitter. The contact member can be adjusted to accommodate different nose bridge shapes, and the light emitter can be repositioned for different pupil locations, making the system universally adaptable without adding excessive complexity.
3Ease of operation
If light emitter position is fixed, then device structure is simple, but visual output quality deteriorates for different user positions
Solution Approach 1:
The light emitter is designed with adjustable positioning capability on the lens, allowing it to be moved to different locations. This enables optimization of visual output quality for different user positions and pupil alignments without implementing complex positioning systems, using simple yet effective adjustment mechanisms.
Solution Approach 2:
The system allows changing the positional parameters of the light emitter relative to the lens and eye. By adjusting the light emitter's position as a variable parameter, the system can optimize visual output for different users without requiring complex mechanical reconfiguration, achieving improved performance through parameter adjustment.
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 enhances user experience by improving alignment of the eye box with the pupil, reducing misalignment issues and enhancing the quality of visual and graphical output.
Implementation Method 1
a light emitter configured to provide light to a portion of the lens
Implementation Method 2
The contact member can extend a first distance from the frame in a first configuration and can be adjusted to extend a second distance from the frame in a second configuration
Implementation Method 3
the modular contact member can be threadably fastened to the frame
Implementation Method 4
The modular contact member can be removably coupled to the frame by one or more magnets
Data Source
AI summary
A wearable electronic device can include one or more contact members that are adjustable or otherwise modular to enable movement of an eye box defined within a lens of the wearable electronic device relative to the wearer's pupil. The contact members can be at least partially disposed within a cavity or recess defined within a frame of the wearable electronic device and can be modular such that the member is removably coupled to the frame and can be replaced by a different member having a dissimilar size or shape. Alternatively, or additionally, the member can be adjustable relative to the frame such that the member extends a first distance relative to the frame in one configuration and a second distance different from the first distance in another configuration.