Domed Screen Structure with External Protection
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Solution Overview
Problem
Existing quick-mounting structures lack external protection for the upper shell, fail to provide shape to the outer surface, and do not adequately protect the inner cavity from environmental exposure and daylight, which affects image projection quality.
Innovation Solution
A domed screen structure with a flexible outer shell and a geodesic frame, where air rarefaction creates a cavity between two hemispherical shells, and overpressure in an additional cavity provides external protection and shapes the outer surface, while maintaining a controlled pressure difference to stabilize the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single hemispherical shell is used for the structure, then the structure is simple and quick to mount, but the upper shell lacks external protection from environmental exposure
Solution Approach 1:
The patent applies nesting by placing one hemispherical shell inside another shell. The inner shell (first shell) contains the screen and projection system, while the outer shell (second shell) provides environmental protection. This nested configuration allows both shells to be mounted independently and quickly assembled, maintaining the quick-mounting advantage while adding protective functionality through the outer shell.
2Device complexity
If no additional external shell is added, then the structure remains simple, but the outer surface cannot be shaped and protected simultaneously
Solution Approach 1:
The patent employs flexible shells for both the inner and outer hemispherical structures. The outer shell can be inflated or pressurized to achieve and maintain desired shapes, including custom outer surface geometries. This flexibility allows the structure to be shaped as needed while keeping the overall design relatively simple and modular, avoiding complex rigid framing systems.
3Device complexity
If the inner cavity is not protected from daylight, then the structure is simpler, but image projection quality deteriorates due to daylight interference
Solution Approach 1:
The nested shell configuration naturally protects the inner cavity containing the screen and projection system. The outer shell acts as a physical barrier that blocks daylight from directly entering the inner cavity and illuminating the screen. This protective effect improves image projection quality by eliminating daylight interference, while the nested design maintains structural efficiency.
4Object-affected harmful factors
If an outer shell is added for protection, then environmental protection is improved, but the device complexity increases
Solution Approach 1:
The patent divides the protective structure into separate functional segments: the inner shell houses the projection system and screen, while the outer shell provides environmental protection. This segmentation allows each shell to be optimized for its specific function and enables independent assembly and maintenance. The modular segmented design reduces overall complexity compared to a monolithic structure by allowing parallel development and assembly of separate components.
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 provides comprehensive external protection, allows for customizable outer surface shapes, enhances image projection quality by shielding the inner cavity from daylight, and improves structural stability and speed of construction.
Implementation Method 1
gas rarefaction is created in the said cavity by a rarefaction means with a suction opening coupled with the said cavity
Implementation Method 2
gas overpressure above atmospheric pressure is created inside the additional cavity by the said rarefaction means with an outlet opening coupled with the inner space of the additional cavity
Data Source
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AI summary
The invention relates to the field of construction and may be used to design quick-mounting structures that are temporary (mobile) and intended for various purposes. A quick-mounting structure comprising at least two preferably flexible hemispherical shells of a larger area and a smaller area, positioned one inside the other, respectively, and interconnected at the bottom around the circumference of the hemisphere to form a cavity, wherein the frame is positioned, and gas rarefaction is created in said cavity by rarefaction means. In addition the structure comprises a flexible outer shell, positioned on the top of said shell of larger area and connected to it at the bottom around of the circumference hemisphere to form an additional cavity, and gas overpressure above atmospheric pressure is created inside the additional cavity by said rarefaction means. The difference between overpressure value and gas rarefaction value in these cavities is not more than 20%.