AR Head-Mounted Display Stability for Endoscopic Surgery
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Solution Overview
Problem
Existing head-mounted displays used in endoscopic surgeries tend to loosen and displace when the surgeon's head is lowered for an extended period, compromising the stability and precision of the surgical procedure.
Innovation Solution
The design of an augmented reality head-mounted display featuring a casing with downward-extending transparent projection panels, a forehead pad, and a rear-head pad with an adjusting mechanism, along with a cable clip structure, ensures the device remains securely positioned on the wearer's head regardless of the head's orientation, preventing loosening or displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head-mounted display is designed for straight-looking operation and side-to-side head swinging, then it is suitable for general VR/AR applications, but it loosens and displaces when the wearer's head is lowered for endoscopic surgery
Solution Approach 1:
The head-mounted display incorporates an adjustable strap system with multiple connection points and length adjustments, allowing the device to adapt dynamically to different head positions and orientations. The straps can be reconfigured to maintain proper tension whether the wearer is looking straight ahead or bent over for endoscopic surgery, thus resolving the contradiction between general versatility and specific stability requirements.
2Reliability
If the head-mounted display uses a fixed strap length design, then the structure is simple, but it cannot accommodate different head positions and causes loosening during surgery
Solution Approach 1:
The strap system is divided into multiple segments with independent adjustment capabilities. Each strap contains multiple connection points and adjustment mechanisms that can be independently configured, allowing the overall system to maintain simplicity while providing the necessary adaptability for different surgical positions and head sizes.
3Ease of operation
If the projection panels extend downward from the casing, then the optical display function is achieved, but the device may interfere with the wearer's field of view or cause displacement when head is lowered
Solution Approach 1:
The two transparent projection panels are positioned asymmetrically relative to the casing, extending downward at specific angles and distances that optimize both optical performance and stability. This asymmetric arrangement allows the panels to maintain proper alignment with the wearer's eyes during head-down positions while preventing interference with the field of view and reducing the likelihood of displacement.
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 a stable and ergonomic fit for surgeons, preventing the head-mounted display from shifting or tilting, even during prolonged head-down positions, thus enhancing the precision and comfort during endoscopic surgeries.
Implementation Method 1
the optical display module being accommodated in the casing for projecting images; the two transparent projection panels extending downward from a bottom surface of the casing, such that the images projected by the optical display module can be displayed on the two transparent projection panels
Data Source
AI summary
An augmented reality (AR) head-mounted display suitable for use with an endoscope to display the images captured by the endoscope in front of a doctor in an augmented reality manner. The AR head-mounted display utilizes a forehead pad that is raised and tilted at a larger angle to match a rear-head pad that is at the eye level of the wearer and is tilted at a smaller angle. The connection cable of the AR head-mounted display is extending to and clamped on a clip structure of the rear-head pad, and then further extending downward from the back of the wearer. No matter whether the wearer is in a straight-up or head-down position, such head-mount design can always be ergonomically and stably held on the wearer's head; there will be no loosening nor displacement even if the wearer's head is lowered for a long time.