Image Capturing Unit Positioning in Display Apparatus
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Solution Overview
Problem
Current video see-through head-mounted displays (HMDs) face issues with image capturing units shielding the user's field of view, leading to visual separation between the video image and the real field of view, and causing phenomena like video motion sickness due to the large size of the image capturing unit or its external placement.
Innovation Solution
The display apparatus is designed with image capturing units arranged inside the angle formed by lines extending from the pupil to the sides of the display unit, ensuring that the image capturing units do not obstruct the user's view, and the relative positions of the display units are adjusted based on the distance between the user's eyes to maintain continuity between the displayed video image and the real field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the image capturing unit is large or placed outside the display unit, then the image capturing function is improved, but the field of view is shielded and visual separation occurs
Solution Approach 1:
The image capturing unit is nested inside the display unit, with the lens positioned within the display housing. This allows the capturing function to be integrated without external placement, preventing field of view shielding while maintaining imaging capability through internal spatial arrangement.
Solution Approach 2:
The patent positions the image capturing unit in a different spatial dimension relative to the display unit, specifically placing it inside the display housing rather than externally. This dimensional repositioning resolves the conflict between capturing capability and field of view obstruction.
2Ease of operation
If an eye cup or shielding structure is used to enhance immersion, then the video image immersion is improved, but the real field of view is hidden causing video motion sickness
Solution Approach 1:
The patent applies selective shielding only in specific local areas where it does not block the real field of view. The eye cup structure is designed with openings or transparent portions that allow peripheral vision to remain unobstructed, providing localized immersion enhancement without causing motion sickness.
Solution Approach 2:
The shielding structures use transparent or translucent materials that allow light transmission, creating a visual effect that maintains awareness of the real environment while enhancing video image immersion. This optical property change prevents complete field of view blockage.
3Stability of the object's composition
If monocular HMD configuration is used for both eyes, then the field of view continuity is improved, but vignetting occurs due to nose obstruction between eyes
Solution Approach 1:
The patent employs asymmetric positioning of display units and image capturing units for each eye, tailored to the specific inter-eye distance of the user. This asymmetric configuration optimizes the field of view for each eye independently, preventing vignetting caused by symmetric monocular lens arrangement while maintaining field of view continuity.
Solution Approach 2:
The patent incorporates adjustable mechanisms that allow the display units and image capturing units to be dynamically repositioned according to the user's inter-eye distance. This dynamic adjustment capability enables optimal field of view configuration for each user, eliminating vignetting while preserving field of view continuity.
Data Source
AI summary
A display apparatus including a left portion corresponding to a left eye of a user and a right portion corresponding to a right eye of the user, each portion includes at least one image capturing unit configured to capture an image of a physical space, and a display unit configured to display a video image based on a captured image obtained by the image capturing unit. The image capturing unit is arranged on an inside of an angle formed by lines extending from the pupil of the corresponding eye to each side of the display unit.