Transparent Screen Hexagonal Holes Image Clarity
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Solution Overview
Problem
Existing transparent screens suffer from uneven transmission and image visibility, causing discomfort due to darkened areas and reduced clarity when projecting images while maintaining transparency.
Innovation Solution
A transparent screen with a thin metal film featuring regular hexagonal hole portions arranged in a web-like pattern, where the line width to diagonal length ratio is between 7/80 and 7/50, ensuring uniform transmittance and reflectance across the screen, enhancing both transmission and image visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a half mirror is uniformly formed over the entire surface of a transparent sheet to provide transmission visibility, then light transmission is improved, but image visibility deteriorates due to darkened areas and reduced clarity
Solution Approach 1:
The screen is segmented into multiple regions: transparent portions (through holes) for light transmission and light diffusing portions (aluminum film layers) for image reflection. This segmentation allows different areas to perform different functions, resolving the contradiction between transmission visibility and image visibility
Solution Approach 2:
Different portions of the screen have different optical properties: the transparent portions maintain high light transmission for background visibility, while the light diffusing portions have high reflectivity for clear image projection. This local differentiation resolves the contradiction by optimizing each region for its specific function
2Illumination intensity
If through holes are formed at regular intervals to maintain transparency, then transmission visibility is improved, but image visibility deteriorates due to reduced light reflection
Solution Approach 1:
The screen is divided into transparent portions (through holes) and light diffusing portions (aluminum film layers with diffusing agents). This segmentation ensures that light transmission and image reflection occur in separate regions, resolving the contradiction between transparency and image clarity
Solution Approach 2:
The light diffusing portions use a composite structure combining aluminum film with light diffusing agents (TiO2, SiO2, ZrO2 particles). This composite material provides both reflectivity for image visibility and controlled light scattering, resolving the contradiction with through holes
3Stability of the object's composition
If the entire screen is made translucent to ensure uniform appearance, then transmission visibility is improved, but image visibility deteriorates due to darkened portions
Solution Approach 1:
The screen is segmented into transparent portions and light diffusing portions, eliminating the need for uniform translucency. The light diffusing portions reflect projected light clearly while transparent portions maintain background visibility, resolving the contradiction between uniform appearance and image clarity
Solution Approach 2:
Different portions have different optical characteristics: transparent portions for background visibility and light diffusing portions for clear image projection. This local quality differentiation resolves the contradiction by allowing non-uniform optical properties to serve different functions
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 allows for clear image projection and display without degrading transmission visibility, providing a balanced and uniform visual experience by maintaining consistent light transmission and reflection across the screen.
Implementation Method 1
a thin film of a metal material, which is arranged on the transparent sheet... image light projected from a projector is reflected off the light diffusing layers
Implementation Method 2
transparent portions, through holes 204 are formed... it is possible to visually recognize a background beyond the screen through the through holes
Data Source
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AI summary
[Object] An object is to provide a transparent screen which can clearly project and display an image without degradation of transmission visibility and a method for manufacturing the transparent screen. [Solution Means] A thin film 4 in which a large number of regular hexagonal hole portions 3 that are identical to each other are opened, in a transparent sheet 2, in a web-like manner is applied to a transparent screen 1. The regular hexagonal hole portions 3 are segmented with web-like line portions 6 formed by connecting the sides 5, 5 of the adjacent regular hexagonal hole portions 3 so as to have an even width, image light projected from a projector 7 is reflected off the web-like line portions 6 and is shown on the transparent screen 1 and a background on the back surface side of the transparent screen 1 can be visually recognized through the regular hexagonal hole portions 3. At this time, when the diagonal length that halves the regular hexagonal hole portion 3 is d, and the line width of the web-like line portion is w, a ratio of w to d (w/d) falls within a range of 7/80 to 7/50, with the result that the transparent screen 1 having the best balance between transparence visibility and image visibility can be provided.