Rotatable Image Forming Optics for Adjustable HUD Image Position
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Solution Overview
Problem
Head-mounted HUDs have a fixed image formation position within the viewer's field of view, limiting the degree of freedom in display position, which can result in an inappropriate image placement for individual users.
Innovation Solution
An image display device with a first image projection unit, an image forming optical unit, and a rotation support unit that allows the image forming optical unit to rotate around a fulcrum point, enabling the position of the formed image to be adjusted and improving the flexibility of the display position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a head mounted HUD is used to project images directly onto the retina, then the device size is reduced, but the image forming position becomes fixed and the degree of freedom of display position is low
Solution Approach 1:
The patent applies the dynamics principle by making the image forming optical unit rotatable around a fulcrum point. This allows the optical unit to dynamically adjust its orientation and change the image forming position within the field of view, transforming a static system into a dynamic one that can adapt to different user preferences and usage scenarios while maintaining a compact head-mounted form factor
2Device complexity
If the image forming position is fixed within the field of view, then the optical device structure is simplified, but the image may be displayed at an inappropriate position depending on user preference
Solution Approach 1:
The rotation support unit enables dynamic adjustment of the image forming position by allowing the optical unit to rotate around a fulcrum point. This provides users with the ability to adjust the image position to their preference while maintaining a relatively simple optical device structure, thus resolving the contradiction between structural simplicity and ease of operation
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 device allows for the dynamic adjustment of image position in space, enhancing user experience by providing a more flexible and appropriate image viewing experience.
Implementation Method 1
an image forming optical unit which forms the first image at a first distance and causes the first image to be incident on a viewpoint of a user
Implementation Method 2
a rotation support unit configured to rotatably hold the image forming optical unit with a fulcrum point as a rotation center
Data Source
AI summary
An image display device has a first image projection unit configured to emit light for forming a first image, an image forming optical unit configured to form the first image at a first distance and cause the first image to be incident on a viewpoint of a user, and a rotation support unit configured to rotatably hold the image forming optical unit with a fulcrum point as a rotation center.