See-Through Display Shield Layout for Natural MR Viewing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video see-through type HMDs experience unnatural discrepancies between displayed images and the surrounding outside world due to separation of the entrance and exit pupils, leading to discomfort for the observer.
Innovation Solution
The display apparatus incorporates a design where the entrance pupils of the imaging optical system are positioned on the outside world side of the observation position, with light shields or exterior members forming a shielded area between the displayed image and the surrounding outside world to reduce the perceived discrepancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entrance pupil in the imaging optical system is separated from the exit pupil in the display optical system, then the imaging system can capture outside-world images, but the displayed image and surrounding outside world appear unnatural and cause observer discomfort
Solution Approach 1:
A light shield is introduced as an intermediary element between the display optical system and the imaging optical system. This light shield blocks stray light from the surrounding outside world from entering the imaging optical system, thereby preventing the observer from perceiving unnatural discrepancies between the displayed image and the real world, while still allowing the entrance pupil to be positioned on the outside world side of the observation position
2Ease of operation
If the entrance pupil is positioned on the outside world side of the observation position, then the displayed image and surrounding outside world can coexist naturally, but a shielded area must be formed to block stray light
Solution Approach 1:
The light shield serves as a simple intermediary structure that is easily integrated between the display optical system and imaging optical system. It effectively blocks stray light without requiring complex mechanisms, maintaining the natural coexistence of displayed and real images while forming the necessary shielded area
Solution Approach 2:
The light shield is designed to block light only in specific regions where stray light from the surrounding outside world would cause unnatural discrepancies. The shielded area is locally defined to match the field of view requirements, blocking unnecessary light while preserving the natural observation effect in the desired viewing area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for a more natural coexistence of the displayed image and the surrounding outside world, reducing observer discomfort and enhancing the sense of unity between the MR space and real space.
Implementation Method 1
an imaging system configured to image an outside world through an imaging optical system
Implementation Method 2
a display system configured to enable a displayed image to be observed by guiding light from a display element configured to display an original image including an outside-world image generated by the imaging system to an observer's eye through a display optical system
Data Source
AI summary
A display apparatus includes an imaging system configured to image an outside world through an imaging optical system, and a display system configured to enable a displayed image to be observed by guiding light from a display element configured to display an original image including an outside-world image generated by the imaging system to an observer's eye through a display optical system. An entrance pupil in the imaging optical system is disposed on an outside world side of an observation position where the eye is disposed. The displayed image and a surrounding outside world outside the displayed image can be observed from the observation position. The display apparatus further comprises a shield configured to form a shielded area between the displayed image and the surrounding outside world.