Reflective Virtual Image Display for Lower Focus Adjustment Stress
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Solution Overview
Problem
Existing display systems that project multiple virtual images struggle with user stress and focus adjustment when switching between images, and there is a need to reduce system size and interference with forward visibility.
Innovation Solution
A display system with a reflective member that positions two virtual images ahead of the user, using reflective regions with different reflectances to minimize focus adjustment stress, and incorporates a transparent reflective member to reduce system size and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple virtual images are displayed using a single reflective member, then system size is reduced, but user stress and focus adjustment difficulty increase
Solution Approach 1:
The reflective member is divided into multiple reflective regions with different reflectance values. Each reflective region corresponds to a specific virtual image and has a reflectance optimized for that image's characteristics (brightness, size, importance). This local differentiation allows multiple images to be displayed with appropriate visual weights while maintaining a compact single-member structure, resolving the contradiction between system size reduction and ease of focus adjustment.
2Illumination intensity
If a reflective member is used to position virtual images ahead of the user, then forward visibility is improved, but system complexity increases
Solution Approach 1:
The reflective member serves multiple functions simultaneously: it positions multiple virtual images ahead of the user, differentiates their visual prominence through varying reflectance, and maintains forward visibility by being transparent or translucent. This multi-functionality reduces the need for separate optical components for each image, thereby managing system complexity while achieving superior forward visibility.
Solution Approach 2:
Different regions of the reflective member have different optical properties (reflectance values) tailored to specific display needs. This localized optimization allows the single reflective member to handle multiple imaging functions with different requirements, reducing overall system complexity compared to using separate components for each function.
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 system reduces user stress and focus adjustment effort by positioning images with optimal reflectance, allows independent control of image elements, and maintains forward visibility by using a transparent member.
Implementation Method 1
a reflective member that reflects the first image light and the second image light, the reflective member positioning the first virtual image and the second virtual image ahead of a user and ahead of the reflective member
Data Source
AI summary
A display system includes a display device that projects first image light forming a first virtual image and second image light forming a second virtual image, a controller that controls the display device, and a reflective member that reflects the first image light and the second image light, the reflective member positioning the first virtual image and the second virtual image ahead of a user and ahead of the reflective member. In the reflective member, a reflectance of a first reflective region that reflects the first image light and a reflectance of a second reflective region that reflects the second image light differ from each other.