Head-Mounted Display Dynamic Load Adjustment
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Solution Overview
Problem
Head-mounted displays (HMDs) are not stably supported on the wearer's head, leading to discomfort and a high risk of being separated during dynamic movements due to excessive shaking.
Innovation Solution
A head-mounted display design featuring a display module, support legs with a load adjuster system that includes a cushion and motorized mechanism to adjust the load distribution based on motion sensors' feedback, ensuring stable support and comfort by dynamically adjusting the cushion's position and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the head-mounted display uses a fixed support structure, then the structure is simple, but the display shakes excessively during dynamic movements and may separate from the wearer's head
Solution Approach 1:
The support legs are designed with dynamic adjustment capability through motorized mechanisms that can change the angle and position of the support legs in real-time. The controller receives input from motion sensors (acceleration sensor and gyro sensor) to detect wearer movement and automatically adjusts the support leg positions to maintain optimal stability during static and dynamic conditions.
Solution Approach 2:
The system incorporates motion sensors (acceleration sensor and gyro sensor) that continuously monitor the wearer's head movement and provide feedback to the controller. The controller processes this feedback and adjusts the support leg positions accordingly, creating a closed-loop control system that adapts to the wearer's actions in real-time.
2Reliability
If the head-mounted display applies high load to the wearer's head, then the display remains stable during movement, but the wearer experiences discomfort and skin pressure
Solution Approach 1:
The load adjustment mechanism dynamically modifies the support force applied by the support legs based on detected movement intensity. During static conditions or minor movements, the system reduces the applied load to minimize discomfort. During vigorous activities, the system increases the load to maintain stability, creating an adaptive support system.
Solution Approach 2:
The system changes the physical parameters of the support force applied by the support legs. The controller adjusts the angle and position of the support legs, which directly changes the magnitude and distribution of the load applied to the wearer's head, optimizing both stability and comfort based on movement conditions.
3Adaptability or versatility
If the head-mounted display uses a single fixed support position, then the structure is simple, but it cannot accommodate various head sizes effectively
Solution Approach 1:
The support legs incorporate motorized adjustment mechanisms that enable dynamic repositioning along the longitudinal direction. The system can automatically adjust the support position to match different head sizes and shapes by receiving feedback from motion sensors and controlling the motorized components to optimize contact points.
Solution Approach 2:
The support legs are designed with multi-functionality, serving both as structural support elements and as adjustable positioning mechanisms. The same support leg structure performs multiple functions: providing mechanical support, accommodating different head sizes through position adjustment, and contributing to stability during movement through angle 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 provides improved comfort and stability by reducing load on the wearer's head during static wear and minimizing shaking during dynamic activities, accommodating various head sizes and distributing the load for reduced skin pressure.
Implementation Method 1
The motor may be a linear motor for enabling the motor shaft to advance and retreat.
Implementation Method 2
The cushion advance/retreat mechanism may include an airbag inflated or contracted by air to enable the cushion to advance and retreat and an air regulator for regulating air of the airbag.
Implementation Method 3
The motion sensor may include an acceleration sensor and a gyro sensor installed in any one of the display mode, the case and the support legs.
Implementation Method 4
The motion sensor may include an acceleration sensor and a gyro sensor installed in any one of the display mode, the case and the support legs.
Data Source
AI summary
The present invention comprises: a display module; a case in which the display module is installed; one pair of support legs connected to the case and supported by the head of a wearer; a motion sensor for sensing the motion of the head of the wearer; a load adjuster for adjusting a load to be applied from the support legs to the head of the wearer; and a control unit for controlling the load adjuster according to a sensing result of the motion sensor, thereby reducing a load to be applied to the head of the wearer during a static wearing so as to provide comfort to the wearer and increasing a load to be applied to the head of the wearer during a dynamic wearing so as to minimize shaking.