Head-Mounted Display Range Stabilization via Orientation Thresholds
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Solution Overview
Problem
Conventional electronic binocular telescopes cause discomfort due to unintentional changes in the observation range when the user's head moves, especially when viewing highly magnified images, as the field-of-view changes with head movement, differing from the natural observation experience.
Innovation Solution
A display device with a camera, orientation detection sensor, and line-of-sight detection sensor, controlled by a processor to adjust the display range based on the detected orientation and line-of-sight changes, minimizing unintended changes by only adjusting the display when significant head movement occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image-capturing range is controlled to match the line-of-sight position, then the observation range can be adjusted to the user's viewing direction, but the observation range changes unintentionally with head movement causing discomfort
Solution Approach 1:
The patent changes the control parameter from continuous line-of-sight tracking to threshold-based movement detection. The processor determines whether to adjust the image-capturing range based on whether the change amount in orientation exceeds a predetermined threshold, thereby stabilizing the observation range during small head movements while still enabling adjustment for intentional viewing direction changes.
2Adaptability or versatility
If the display range is continuously adjusted based on line-of-sight detection, then the observation range follows the user's viewing direction, but unintentional changes occur during normal head movement
Solution Approach 1:
The patent introduces a threshold-based feedback mechanism where the processor continuously monitors orientation changes but only triggers display range adjustment when the change amount exceeds the predetermined threshold. This feedback control filters out unnecessary adjustments during normal head movement while maintaining adaptability for intentional viewing direction changes.
3Stability of the object's composition
If the observation range is fixed regardless of head movement, then the field-of-view remains stable, but the user cannot naturally observe different directions without physical repositioning
Solution Approach 1:
The patent implements a dynamic observation range that can switch between fixed and adjustable states based on detected orientation changes. When the change amount in orientation exceeds the threshold, the system dynamically adjusts the image-capturing range to follow the viewing direction, thereby providing both stability during normal movement and flexibility when needed.
Data Source
AI summary
A display device configured to be used in a state of being fixed to a head of a user, includes: a camera; a display configured to display a part of an image captured by the camera as a display range; an orientation detection sensor configured to detect an orientation of the display device; a line-of-sight detection sensor configured to detect a line-of-sight of the user to the display; and a processor configured not to control a position of the display range based on the line-of-sight detected by the line-of-sight detection sensor in a case where a change amount of the orientation detected by the orientation detection sensor is smaller than a predetermined amount, and to control the position of the display range based on the line-of-sight in a case where the change amount of the orientation is larger than the predetermined amount.