Retroreflective Aerial Image Display With Angled Polarizing Plates
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Solution Overview
Problem
Conventional aerial image display systems using retroreflection struggle with visibility issues due to the light source being visible at certain angles, causing discomfort to viewers.
Innovation Solution
The display device incorporates a configuration with multiple polarizing plates having different inclinations and a curved diffusion plate to effectively polarize light, reducing the visibility of the light source and enhancing the visibility of the aerial image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single polarizing plate is used to dim the light source, then the structure is simple, but the light source remains visible at certain angles causing viewer discomfort
Solution Approach 1:
The single polarizing plate is divided into multiple polarizing plates with different inclination angles. Each plate segment handles specific light paths, collectively achieving complete light source dimming while maintaining structural organization.
Solution Approach 2:
The polarizing plates are arranged with asymmetric inclination angles relative to the light source. This asymmetric configuration ensures that light from the light source is blocked at all viewing angles, eliminating the visibility problem that symmetric arrangements cannot solve.
2Object-affected harmful factors
If multiple polarizing plates with different inclinations are added, then light source visibility is reduced, but device complexity increases
Solution Approach 1:
Multiple polarizing plates with different inclinations are combined into a single integrated optical system. This merging approach achieves comprehensive light control functionality while maintaining a compact overall structure, balancing performance improvement with structural simplicity.
3Volume of moving object
If polarizing plates are arranged parallel to the light source, then the structure is compact, but the light source remains visible and aerial image quality is compromised
Solution Approach 1:
The polarizing plates are arranged in different angular dimensions rather than parallel alignment. This dimensional change in arrangement allows the system to maintain compactness while effectively controlling light paths to improve aerial image quality and eliminate light source visibility.
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 improved polarization efficiency reduces the visibility of the light source, allowing for clearer and more comfortable viewing of the aerial image without special glasses.
Implementation Method 1
a first polarizing plate arranged over the diffusion plate... The first polarizing plate includes a region inclined with respect to a main surface of the second polarizing plate
Implementation Method 2
a retroreflecting member arranged on the second polarizing plate and having a design for generating an original image by irradiation of the light source
Implementation Method 3
a polarizing beam splitter arranged to face the retroreflecting member
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~4B
AI summary
A display device capable of displaying an aerial image by using retroreflection includes a light source, a diffusion plate arranged over the light source, a first polarizing plate arranged over the diffusion plate, a second polarizing plate arranged over the first polarizing plate, a retroreflecting member arranged on the second polarizing plate and having a design for generating an original image by irradiation of the light source, and a polarizing beam splitter arranged to face the retroreflecting member. The first polarizing plate includes a region inclined with respect to a main surface of the second polarizing plate.