Aerial Image Display Screen Layout for Contrast and Component Hiding
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Solution Overview
Problem
Existing aerial image display devices suffer from issues such as internal components being visible through transparent portions, postcard effects, and decreased contrast, which degrade the viewability and quality of stereoscopic projection images.
Innovation Solution
The device incorporates a light-transmissive screen with higher transmittance for image light than projection light, along with a controller that adjusts luminance based on ambient light intensity, and includes an optical system to form aerial and projection images, reducing visibility of internal components and postcard effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display panel is placed in the transparent state to display the stereoscopic projection image, then the stereoscopic projection image can be viewed, but internal components become visible through the transparent portion degrading image quality
Solution Approach 1:
A light-transmissive screen is introduced as an intermediary component between the display panel and the projection image. This screen has selective transmittance properties: it allows projection image light to pass through while blocking views of internal components from oblique angles, thus mediating between the need for transparency and the need to hide internal components
Solution Approach 2:
The light-transmissive screen exhibits different transmittance properties for different light paths: high transmittance for projection image light (coming from a specific angle) and low transmittance for light from internal components (coming from oblique angles). This local quality differentiation resolves the contradiction by making the screen transparent only where needed
2Adaptability or versatility
If the display panel is made transparent to show the projection image, then stereoscopic effect is achieved, but postcard effects and decreased contrast occur
Solution Approach 1:
The light-transmissive screen acts as a mediator that enhances contrast by blocking stray light from internal components while allowing the projection image to pass through. This resolves the contrast degradation issue that occurs when the display panel is fully transparent
Solution Approach 2:
The system dynamically controls the transmittance parameter of the light-transmissive screen to optimize both stereoscopic effect and image contrast. By adjusting the screen's optical properties, the system maintains high contrast while enabling stereoscopic projection
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 enhances the viewability and quality of aerial images by minimizing the visibility of internal components and postcard effects, while maintaining high image quality and stereoscopic effects.
Implementation Method 1
The optical member has a higher transmittance for the first light than for the second light
Data Source
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.