Air-Permeable Dot Screen for Outdoor Holographic Projection
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Solution Overview
Problem
Conventional holographic screens are unsuitable for outdoor use due to wind resistance issues, poor image quality, and high manufacturing costs, limiting their ability to display large, high-quality holographic images in outdoor settings.
Innovation Solution
An outdoor air-permeable dot screen is created using entwined transparent film yarns with knots forming dots and through holes for air permeation and light scattering, allowing for diffuse reflection and diffraction, which enhances image sharpness and reduces wind resistance while maintaining a lightweight and flexible structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional holographic screen uses a transparent hard film, then transparency is secured, but it cannot withstand wind pressure and cannot be installed outdoors
Solution Approach 1:
The patent applies porous materials by using a mesh fabric substrate with intentional open spaces between threads. This porous structure allows wind to pass through rather than exerting full pressure on the screen, enabling outdoor installation while maintaining screen integrity. The mesh structure fundamentally changes how the screen interacts with wind forces compared to solid film structures.
Solution Approach 2:
The patent uses a flexible mesh fabric instead of rigid hard film. This flexible thin film structure can deform and adapt to wind forces without breaking, unlike rigid transparent films that would shatter or deform permanently. The flexibility allows the screen to survive outdoor conditions while maintaining its light-transmitting and light-reflecting functions.
2Manufacturing precision
If a translucent artificial silk or mesh fabric is used, then large area outdoor installation is possible, but sharpness and color are significantly reduced due to low diffuse reflectance
Solution Approach 1:
The patent creates a composite material system combining mesh fabric with transparent yarns containing reflective particles. The mesh fabric provides structural support and wind resistance, while the transparent yarns with reflective particles enhance light diffusion and reflection. This composite structure achieves both mechanical durability for outdoor use and optical properties for sharp, bright images.
Solution Approach 2:
The patent applies local quality by selectively adding reflective particles to specific yarns within the mesh structure. Rather than making the entire mesh fabric highly reflective (which would reduce transparency), only specific transparent yarns contain reflective particles. This localized approach enhances brightness and sharpness where needed while preserving the overall transparency and wind-permeable characteristics of the mesh structure.
3Manufacturing precision
If glass grains are attached to or inserted into the plate to cause diffuse reflection, then sharpness is improved, but manufacturing costs increase and the structure becomes heavy
Solution Approach 1:
The patent uses inexpensive transparent yarns with reflective particles instead of expensive glass grains embedded in heavy plates. The yarn-based approach is cheaper to manufacture and results in a much lighter structure. The reflective particles are integrated into the yarn structure rather than requiring heavy plate embedding, achieving sharpness at low cost and low weight.
Solution Approach 2:
The patent replaces the mechanical plate structure with a textile-based mesh structure. Instead of embedding reflective elements in a rigid heavy plate, the invention uses flexible yarns woven into a mesh that inherently provides structural support. This substitution of mechanical support system dramatically reduces weight while maintaining or improving image sharpness through the optical properties of the reflective yarns.
4Illumination intensity
If LED display boards are used for large-scale outdoor images, then visibility is improved, but cost increases due to heavy weight and installation complexity
Solution Approach 1:
The patent uses the mesh fabric with reflective yarns as an intermediary medium between the projection source and the viewer. Rather than using self-emissive LED boards that require complex power and control systems, the invention uses a passive reflective screen that works with standard projection equipment. The mesh structure with optimized optical properties acts as an intermediary that enhances projected image visibility without requiring the complexity of active display elements.
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 screen provides high contrast and sharpness, minimizes wind influence, and allows for large, flexible holographic displays in outdoor spaces without blocking rear views, while reducing manufacturing costs and maintaining aesthetic appeal.
Implementation Method 1
a plurality of dots formed by knotting the entwined yarn at preset intervals to cause diffuse reflection of light projected from the imaging device
Implementation Method 2
a through hole formed between the dots in a penetrating manner for air permeation and scattering of light
Data Source
AI summary
The present invention relates to a holographic outdoor screen and, particularly, to an outdoor air-permeable dot screen comprising: entwined yarn which reduces wind resistance and enables a large image to be projected outdoors; a plurality of dots which are formed by knotting the entwined yarn at pre-set intervals so that light projected from an imaging device forms a diffused reflection; and through-holes which are formed between the dots in order to allow wind to permeate and light to scatter.