HMD Eye Position Gap Adjustment for 3D Viewing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing head-mounted displays (HMDs) cause abnormality in stereoscopic viewing or visually induced motion sickness when mispositioned, as they fail to accurately correct the positional gap between the screen and the viewer's eyes, leading to inappropriate parallax and eye movement.
Innovation Solution
A head-mounted display system that includes a position obtaining unit to measure the inner or outer corner of the eye, a standard position storage unit to store the measured position, a position gap detecting unit to detect any deviation, and an image processing unit to rotate or move the 3D video image accordingly, ensuring comfortable viewing by compensating for the positional gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the HMD is fixed to the head portion and the head tilts, then the screen tilts together with the head, but a gap occurs between the vertical axis of the screen and the vertical axis of the actual viewing zone, causing motion sickness
Solution Approach 1:
The patent applies dynamics by making the screen orientation adjustable and adaptive rather than fixed. The system dynamically changes the screen's vertical axis orientation based on detected eye position to maintain alignment with the viewing zone, resolving the contradiction between screen stability and motion sickness prevention.
Solution Approach 2:
The patent uses feedback by detecting the viewer's eye position and using this information to adjust the screen orientation. The detected eye position feeds back to the display system, which then rotates the screen to align with the actual viewing zone, eliminating the gap that causes motion sickness.
2Reliability
If the HMD is mispositioned from the head portion, then abnormality in stereoscopic viewing occurs or fatigue and visually induced motion sickness are caused
Solution Approach 1:
The patent applies self-service by enabling the system to automatically detect and correct its own mispositioning. The eye position detection and screen rotation features allow the HMD to self-adjust without requiring precise manual mounting, making the system tolerant to mounting variations while maintaining reliable stereoscopic viewing.
Solution Approach 2:
The patent uses parameter changes by adjusting the screen orientation parameter (rotation angle) based on detected eye position. This dynamic parameter adjustment compensates for mispositioning, allowing the system to maintain high stereoscopic viewing quality even when mounting precision is insufficient.
3Ease of operation
If the screen is rotated to correct head tilt, then the image appears fixed horizontally, but the position gap between screen and eye may still cause stereoscopic viewing abnormality
Solution Approach 1:
The patent replaces mechanical alignment (fixed screen orientation) with an optical/digital solution (eye position detection and software-based screen rotation). This substitution allows for more precise and dynamic adjustment of screen orientation based on actual eye position, improving both ease of operation and stereoscopic viewing accuracy.
Data Source
AI summary
An HMD includes: a display which displays a three-dimensional video image; a position obtaining unit which measures a position of an inner corner or tail of an eye of a viewer with respect to the display; a standard position storage unit which obtains and stores, as a standard position relating to the position, the measured position of the inner corner or outer corner of the eye, in calibration for determining the standard position; a position gap detecting unit which detects, as a position gap, a difference between the standard position and a newly measured position of the inner corner or outer corner of the eye of the viewer viewing content with respect to the display; and an image processing unit which performs image processing on the 3D video image to be displayed on the display, to rotated or parallely move the 3D video image according to the detected position gap.