Head Mounted Display Weight Reduction via Trunk-Mounted Sensors
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Solution Overview
Problem
The weight of head-mounted display (HMD) devices increases with the sophistication of their functions, leading to a physical burden on users and making long-term use difficult.
Innovation Solution
A head-mounted display apparatus with a separate configuration for the head attached part and the body trunk attached part, where sensors and components are mounted on the body trunk attached part to reduce the weight on the head attached part, and the positional relationship between the two parts is calculated to grasp the states of both parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensors and components are mounted on the head attached part to enable advanced functions, then the functionality and measurement capability are improved, but the weight on the user's head increases causing physical burden
Solution Approach 1:
The HMD system is divided into two separate parts: a head attached part and a body trunk attached part. The head attached part contains only essential components for display and basic sensing, while the body trunk attached part houses additional sensors and processing components. This segmentation allows advanced functions to be implemented without concentrating all weight on the user's head, thereby resolving the contradiction between functionality and weight burden.
2Measurement precision
If the same type of sensors are provided in both the HMD and body trunk to detect head direction and body trunk direction, then the measurement capability is improved, but the device complexity and weight increase
Solution Approach 1:
The body trunk attached part is equipped with sensors that can detect both body trunk direction and, through collaborative calculation with the head attached part sensors, head direction. This multi-functional approach allows a single sensor set in the body trunk to contribute to multiple measurement objectives, reducing the need for duplicate sensor configurations and thereby decreasing device complexity while maintaining measurement precision.
Data Source
AI summary
Provided regarding a technique of an HMD is a technique capable of realizing high functionality and weight reduction in a well-balanced manner and improving useability for a user. An HMD of an embodiment is a head mounted display apparatus, includes: a head attached part that is attached to a user's head and has a display screen for displaying an image; and a body trunk attached part communicating with the head attached part and attached to a portion of the user's body trunk, measures a relatively positional relationship between the head attached part and the body trunk attached part and grasps states including a position and a direction of the head attached part states including a position and a direction of the body trunk attached part based on the positional relationship.