Head-Mounted Display Divider Part for Crosstalk Reduction
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Solution Overview
Problem
Head-mounted displays suffer from crosstalk issues, where display light from one eye's display element enters the opposite eye, degrading display quality, especially when the optical system is enlarged to increase viewing angles.
Innovation Solution
Incorporating a reflective member in front of the user and a divider part between the spaces in front of the left and right eyes, which diffusely reflects display light to reduce crosstalk and enhance display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical system is enlarged to increase the viewing angle, then the viewing angle increases, but crosstalk light increases causing degradation of display quality
Solution Approach 1:
A nasal ridge piece is introduced as an intermediary component between the left and right optical systems. This vertical bar or wall structure physically separates the two optical paths, blocking crosstalk light from entering the opposite eye while maintaining the enlarged optical system configuration for wide viewing angles.
Solution Approach 2:
The optical system is segmented into distinct left and right channels by the nasal ridge piece. This segmentation creates separate field of view spaces for each eye, preventing light from one side from interfering with the other, thus reducing crosstalk while preserving the benefits of an enlarged optical system.
2Object-affected harmful factors
If a nasal ridge piece is used to separate fields of view, then crosstalk is reduced, but the vertical bar structure may be visually prominent or affect aesthetics
Solution Approach 1:
The nasal ridge piece is configured with specific optical properties including transparency or translucency, and may match the color or visual characteristics of surrounding components. This reduces its visual prominence while maintaining its light-blocking function for crosstalk reduction.
3Volume of moving object
If the optical system is compact, then device size is reduced, but viewing angle is limited
Solution Approach 1:
The optical system utilizes vertical arrangement and depth positioning of components (display elements above beam splitters, combiners positioned strategically) to achieve wide viewing angles without proportionally increasing horizontal device width. The nasal ridge piece extends in the vertical direction to separate fields of view without significantly increasing overall device volume.
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
The solution effectively minimizes crosstalk, leading to improved display quality with reduced noise components and increased contrast, allowing for higher quality virtual or augmented reality experiences.
Implementation Method 1
a reflective member arranged in front of a user, and configured to reflect display light for forming a display image toward the user
Implementation Method 2
a divider part arranged between a space in front of a left eye of the user and a space in front of a right eye, and configured to diffusely reflect the display light
Data Source
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AI summary
A head-mounted display (100) according to an embodiment includes a combiner (121L), (121R) configured to combine display light (PL11), (PR11) for forming a display image and outside light (PL21), (PR21) from in front of a user wearing the head-mounted display, and a divider part (140) arranged between a space (160L) in front of a left eye (EL) of the user and a space (160R) in front of a right eye (ER), and configured to diffusely reflect the display light.