Projection Screen Elastic Connecting Cloth Tensioning
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Solution Overview
Problem
Large-sized projection screens face challenges with deformation and unevenness due to the use of fixing structures, which affect flatness and make them cumbersome for transportation and enlargement.
Innovation Solution
A projection screen design incorporating a screen board, a connecting cloth, and a screen frame with connecting members that provide tension to maintain flatness, using a soft connecting cloth and adhesive layers to ensure stability and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fixing structures are used for large-sized projection screens, then the screen can maintain its shape, but the screen becomes deformed and uneven affecting flatness
Solution Approach 1:
The patent uses a flexible connecting cloth with elastic properties to replace rigid fixing structures. The connecting cloth is stretched and fixed to the screen frame, using its own elasticity to tension and flatten the screen board, thereby avoiding deformation and unevenness caused by traditional rigid fixing methods.
Solution Approach 2:
The patent changes the physical state of the connecting material from rigid to flexible by selecting an elastic connecting cloth. The elastic properties of the cloth allow it to be stretched during installation and then maintain a constant tensile state, dynamically adjusting to maintain screen flatness under different conditions.
2Reliability
If traditional fixing structures are used, then the screen can be secured, but it becomes cumbersome for transportation and enlargement
Solution Approach 1:
The elastic connecting cloth replaces complex rigid fixing structures, making the entire screen system more flexible and easier to disassemble and assemble. This simplifies the structure for transportation while maintaining reliable securing through the elastic tension of the cloth.
Solution Approach 2:
The screen is divided into modular components (screen frame, connecting cloth, screen board) that can be easily assembled and disassembled. The connecting cloth serves as a simple yet effective connector, enabling quick setup and teardown for transportation without compromising securing reliability.
3Area of stationary object
If larger screen sizes are used, then the projection area increases, but deformation and unevenness increase affecting image quality
Solution Approach 1:
The elastic connecting cloth is particularly effective for large screens as it can span larger distances while maintaining uniform tension. The cloth's elasticity allows it to accommodate slight variations in the screen board and frame, ensuring flatness across the entire large projection area without the need for complex rigid support structures.
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 ensures the screen board remains flat and stable, improving image quality, facilitating transportation, and allowing for larger screen sizes without increasing weight or complexity.
Implementation Method 1
the at least one connecting member is configured to provide a tension to the connecting cloth
Implementation Method 2
At least a portion of the second surface of the screen board located in the edge region is connected to the connecting cloth
Data Source
AI summary
A projection screen includes a screen board, a connecting cloth, a screen frame, and at least one connecting member. The screen board has a first surface and a second surface opposite, the screen board has a light receiving region and an edge region surrounding the light receiving region. At least one edge of the connecting cloth protrudes from a corresponding edge of the screen board, and at least a portion of the second surface of the screen board located in the edge region is connected to the connecting cloth. The screen frame has a hollow structure, an orthographic projection of the screen board on a plane parallel to the first surface is located within an outer border of an orthographic projection of the screen frame on the plane. The at least one connecting member connects at least one edge of the connecting cloth to the screen frame.