HMD Baseline Displacement Correction via Stereo Camera Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Head-mounted displays (HMDs) face challenges in establishing binocular stereoscopic vision due to slight displacements in the vertical image position between right and left optical systems, especially when the IPD adjusting mechanism is activated, leading to blurred images and failure in establishing stereoscopic vision, particularly in lightweight HMDs prone to deformation by external forces.
Innovation Solution
A display device with a calculation unit that determines baseline displacement between right and left display units using stereo cameras and a conversion unit that corrects this displacement by adjusting image coordinates based on rotation and vertical offset parameters, ensuring accurate alignment and minimizing parallax differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an IPD adjusting mechanism is added to assist binocular stereoscopic vision, then adaptability to different users is improved, but baseline displacement occurs causing binocular stereoscopic vision to fail
Solution Approach 1:
The system uses cameras to capture images, calculates baseline displacement based on captured image data, and feeds back correction information to the display control unit. This closed-loop feedback mechanism dynamically adjusts for IPD variations and structural deformations, maintaining reliable binocular stereoscopic vision while accommodating different users.
Solution Approach 2:
The system changes display parameters (image position, baseline distance) based on calculated displacement values. By dynamically adjusting these parameters according to actual baseline displacement, the system maintains accurate binocular alignment across different users and structural conditions.
2Ease of operation
If the HMD is designed to be small and light to improve wearing feeling, then ease of operation is improved, but the casing deforms under external force causing image displacement
Solution Approach 1:
The baseline calculation unit continuously monitors structural deformations by analyzing captured images and calculates displacement caused by casing deformation. This feedback allows the system to compensate for structural instability in lightweight designs, maintaining image alignment despite external forces.
Solution Approach 2:
The system uses its own cameras and processing capabilities to detect and correct baseline displacement caused by casing deformation. The HMD self-diagnoses and self-corrects structural issues without external intervention, enabling lightweight design while maintaining stability.
3Adaptability or versatility
If the HMD is designed to be small and light to improve wearing feeling, then adaptability is improved, but binocular stereoscopic vision cannot be established due to image displacement
Solution Approach 1:
The system implements continuous feedback through camera-based baseline measurement and dynamic correction. This allows lightweight HMDs to maintain reliable binocular stereoscopic vision by compensating for small displacements that occur due to the lightweight structure and user wear variations.
Data Source
AI summary
A display device (100) according to the present disclosure includes a calculation unit that calculates a displacement of a baseline serving as a reference of display processing on right and left display units (110) on the basis of information obtained from a plurality of cameras (60) installed in the vicinity of the right and left display units corresponding to a user's visual field, and a conversion unit that converts an image displayed on the display unit so as to correct the baseline displacement calculated by the calculation unit.