HMD Content Display via Head Motion Reference Tracking
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Solution Overview
Problem
Existing head-mounted display (HMD) systems face difficulties in allowing users to easily select and change content displays due to cluttered virtual displays, which can obstruct the visual field and hinder operation, especially when worn on the head.
Innovation Solution
A display apparatus with a detection section to track head position and motion, a reference setting section to establish a reference state, and a display controlling section that adjusts content displays based on head movement, maintaining relative positions and allowing simple operation for content selection and change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple virtual displays are arranged in three-dimensional virtual space, then the quantity of displayed content increases, but the user's ability to select desired content and operate the device deteriorates due to visual obstruction and clutter
Solution Approach 1:
The virtual display space is segmented into multiple depth layers (first virtual display space closer to user, second virtual display space farther from user). Contents are distributed across these layers based on importance and usage frequency, allowing users to access different content types at different depths without visual clutter in a single plane.
Solution Approach 2:
The patent transitions from two-dimensional display arrangement to three-dimensional spatial arrangement with depth perception. By utilizing the depth dimension, multiple contents can be displayed at different distances from the user, enabling intuitive selection through head motion while maintaining clear visibility of the surrounding environment.
2Loss of information
If virtual displays are arranged in front of the user, then content visibility is improved, but the user's visual field is blocked and operation becomes hampered
Solution Approach 1:
By arranging contents in three-dimensional space at different depths rather than flat 2D planes, the patent allows users to view contents at specific depths while maintaining peripheral vision of the surrounding environment. This depth-based arrangement reduces visual field obstruction while preserving content visibility.
Solution Approach 2:
Different regions of the visual field are assigned different functions: the central visual field displays important contents at appropriate depths, while peripheral regions maintain transparency or display less critical information, allowing users to monitor surroundings while accessing content.
3Ease of operation
If display apparatus is worn on the user's head, then portability and hands-free operation are improved, but visibility of outside scene is reduced and operation section accessibility deteriorates
Solution Approach 1:
The patent utilizes three-dimensional virtual display space where contents are positioned at various depths in front of the user rather than covering the entire visual field. This allows users to view contents while maintaining visibility of the outside scene through transparent or semi-transparent display regions and peripheral vision.
Solution Approach 2:
The display system dynamically adjusts content positioning and transparency based on user needs and environmental conditions, allowing optimization between content visibility and outside scene visibility in real-time while maintaining hands-free operation capability.
Data Source
AI summary
An HMD includes a six-axis sensor, a magnetic sensor, and a head motion detecting section that detect at least one of the position and motion of a head, a reference setting section that sets a reference state based on at least one of the head position and motion detected by the head motion detecting section, and a display controlling section that changes the display state of a content displayed by the display section based on changes in the position and motion of the head with respect to those in the reference state. The content is formed of a plurality of contents, and the display controlling section changes the display state of the contents displayed by an image display section in such a way that the relative display positions of the contents are maintained.