Aerial Image Display Screen for Contrast and Component Masking
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Solution Overview
Problem
Existing aerial image display devices suffer from issues such as internal components being visible from outside, postcard effects, and decreased contrast, which degrade the viewability and quality of stereoscopic projection images.
Innovation Solution
An aerial image display device comprising a display, an optical system, a light-transmissive screen, and an image projector, where the light-transmissive screen has higher transmittance for image light than projection light, and a controller adjusts luminance based on ambient light to enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display panel is placed in transparent state to display stereoscopic projection image, then the stereoscopic projection image can be viewed, but internal components become visible from outside degrading image quality
Solution Approach 1:
A light-transmissive screen is introduced as an intermediary component between the display panel and the projection optical system. This screen has selective optical properties: it transmits projection light effectively while blocking or scattering light from internal components, thus mediating between the need for transparency and the need to hide internal components
Solution Approach 2:
The light-transmissive screen is positioned specifically at locations where internal components are visible, providing localized masking. The screen allows projection light to pass through while selectively blocking views of internal components from specific angles, achieving local quality improvement without affecting overall system functionality
2Illumination intensity
If the display panel is placed in transparent state, then stereoscopic projection image can be displayed, but postcard effects occur degrading display quality
Solution Approach 1:
The light-transmissive screen acts as a mediator between the transparent display panel and the projection optical system, reducing postcard effects by controlling light transmission paths and minimizing parasitic reflections that cause the postcard effect
Solution Approach 2:
The optical properties of the light-transmissive screen are specifically designed to change light transmission characteristics, reducing postcard effects while maintaining adequate transmittance for projection light. The screen's optical parameters are optimized to balance transparency and postcard effect suppression
3Illumination intensity
If the display panel is placed in transparent state, then stereoscopic projection image can be displayed, but contrast decreases degrading image quality
Solution Approach 1:
The light-transmissive screen serves as an intermediary that enhances contrast by selectively transmitting projection light while blocking stray light and reflections from internal components, thus improving image contrast without compromising the transparency needed for stereoscopic display
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 effectively reduces the visibility of internal components, minimizes postcard effects, and maintains high-quality display of both aerial and projection images by optimizing luminance and contrast.
Implementation Method 1
an optical system configured to form an aerial image as a real image from first light emitted from the first light emitter
Implementation Method 2
The optical member has a higher transmittance for the first light than for the second light
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An aerial image display device includes a display, an optical system that forms an aerial image as a real image from image light emitted from the display, a light-transmissive screen between the aerial image and the optical system, and an image projector that emits projection image light toward the light-transmissive screen in a direction different from an optical axis direction of the image light between the aerial image and the optical system. The light-transmissive screen transmits the image light and diffuses the projection image light to display a projection image.