Aerial Image Display Device with Segmented Light Blocking
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Solution Overview
Problem
Conventional display devices using aerial imaging by retro-reflection (AIRR) struggle to prevent false images and direct irradiation from being observed, limiting the visibility of aerial images in three-dimensional spaces without the need for special eyeglasses.
Innovation Solution
A display device comprising a light source, a light splitting portion that surface-reflects emission light, a retro-reflection portion that retro-reflects the reflected light, and light blocking portions to block surface-reflected light and direct irradiation, allowing for the transmission of retro-reflected light and formation of aerial images without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a retro-reflection portion is used to display aerial images, then the aerial images can be observed in three-dimensional space without special eyeglasses, but false images and direct irradiation interfere with the observation
Solution Approach 1:
The light blocking portion is divided into multiple segments: a first light blocking portion that blocks direct irradiation from the light source, and a second light blocking portion that blocks false images. This segmentation allows each component to address specific interference issues independently while maintaining the overall function of preventing harmful light from reaching the observation position.
Solution Approach 2:
The harmful elements (direct irradiation and false images) are extracted and blocked separately from the useful retro-reflected light. The light blocking portions are strategically positioned to remove only the harmful light paths while preserving the retro-reflected light that forms the aerial image, thereby separating the useful function from the harmful effects.
2Reliability
If light blocking portions are added to prevent false images and direct irradiation, then observation quality improves, but device complexity increases
Solution Approach 1:
The light blocking portion is designed to perform multiple functions simultaneously: it blocks direct irradiation from the light source, prevents false images from reaching the observation position, and does not interfere with the retro-reflected light that forms the aerial image. This multi-functionality reduces the need for additional separate components while maintaining observation quality.
Solution Approach 2:
The light blocking portion acts as an intermediary element between the light source and the observation position. It mediates the light paths by selectively blocking harmful direct and false light while allowing the useful retro-reflected light to pass through, thereby improving observation quality without requiring complex additional systems.
3Illumination intensity
If high-brightness light sources are used to improve aerial image visibility, then image brightness increases, but direct irradiation and false images become more problematic
Solution Approach 1:
The light blocking portion converts the harmful effect of high-brightness light sources into a benefit by selectively blocking only the direct irradiation and false images while allowing the retro-reflected light to reach the observation position. This enables the use of high-brightness light sources to improve aerial image visibility without the detrimental effects of direct irradiation and false images.
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 enables the observation of bright aerial images in regions where conventional devices fail, preventing false images and direct image observation, thereby enhancing user visibility and allowing the use of high-brightness light sources.
Implementation Method 1
a light splitting portion configured to surface-reflect at least some of first emission light emitted from the light source as first reflected light
Implementation Method 2
a first retro-reflection portion configured to retro-reflect at least some of the first reflected light as retro-reflected light toward the light splitting portion
Implementation Method 3
a first light blocking portion configured to block surface-reflected light reflected by the first retro-reflection portion toward an observation position of the retro-reflected light
Implementation Method 4
The light splitting portion is configured to transmit at least some of the retro-reflected light retro-reflected by the first retro-reflection portion
Data Source
AI summary
A display device as an embodiment of the present invention is provided with a light source, a light splitting portion for causing first emission light emitted from the light source to be surface-reflected as first reflected light, a retro-reflection portion for retro-reflecting the first reflected light toward the light splitting part as retro-reflected light, and a first light blocking portion for blocking surface-reflected light surface-reflected by the retro-reflection part toward an observation position of the retro-reflected light. The light splitting portion is configured to transmit at least some of the retro-reflected light.