See-Through AR Medical Displays with Pantoscopic Tilt
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Solution Overview
Problem
Existing head-mounted display devices for augmented reality applications in medical interventions cause wearer fatigue and discomfort due to uneven weight distribution and pressure points, limiting their usability for extended periods.
Innovation Solution
The design of a head-mounted display device with adjustable straps and temple housings that distribute weight across the forehead and back of the head, featuring a see-through display assembly with adjustable tilt angles and detachable lenses, along with a pantoscopic tilting mechanism for enhanced comfort and ergonomic fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the head-mounted display device concentrates weight on a small area (nose or temples), then the device structure can be simpler, but wearer fatigue and discomfort increase
Solution Approach 1:
The weight distribution mechanism is segmented into multiple independent components: temple housings with adjustment mechanisms, a forehead support member, and a nose pad. Each component can be independently adjusted to distribute weight across different areas of the wearer's head, preventing concentration of weight on single sensitive points while maintaining manageable structural complexity through modular design
Solution Approach 2:
The device incorporates dynamic adjustment capabilities through movable temple housings that can slide along straps, adjustable forehead support members, and repositionable nose pads. These dynamic elements allow the weight distribution pattern to be adapted to different wearers and preferences, improving comfort without requiring an overly complex fixed structure
2Ease of operation
If the display assembly is fixed at a single angle, then the device structure can be simpler, but ergonomic fit and comfort for prolonged use are reduced
Solution Approach 1:
The display assembly incorporates a pantoscopic tilting mechanism that enables dynamic angle adjustment between -30 to +30 degrees relative to the frame. This movable connection allows the display to be tilted to optimal viewing angles for different wearers and positions, improving ergonomic fit. The mechanism includes a tilting assembly with a pin and slot configuration that provides smooth adjustment while maintaining structural integrity
Solution Approach 2:
The display assembly is segmented into independently adjustable components: the display module itself, the pantoscopic tilting mechanism, and the temple housings. Each segment can be adjusted independently, allowing fine-tuning of the overall ergonomic fit without requiring a completely complex integrated adjustment system
3Duration of action of moving object
If the device is designed for extended wear (2-6+ hours), then usability in medical procedures improves, but weight distribution and pressure management become more critical
Solution Approach 1:
The weight distribution system is divided into multiple segmented components including temple housings, forehead support members, and nose pads, each capable of independent adjustment. This segmentation allows precise optimization of weight distribution across the wearer's head, reducing pressure on any single area and enabling comfortable extended wear during prolonged medical procedures
Solution Approach 2:
The device allows change in multiple parameters including the angular orientation of the display assembly (-30 to +30 degrees pantoscopic tilt), the position of temple housings along straps, and the location of the forehead support member. These parameter adjustments enable optimization of weight distribution and pressure points for extended wear, reducing fatigue while maintaining usability throughout long procedures
Data Source
AI summary
A display device comprising: a see-through display assembly comprising an at least partially transparent display configured to display to a user an augmented reality (AR) image comprising a virtual reality (VR) image presented over a scene of a patient; and a pantoscopic tilting assembly configured to pivotably adjust a pantoscopic tilt angle of the see-through display assembly.