Low-Transmittance Front Cover for Flat Outdoor Video Walls
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Solution Overview
Problem
Digital signage displays experience screen distortion due to thermal deformation caused by temperature differences, especially when installed outdoors, and existing solutions fail to maintain a flat surface and prevent separation of components.
Innovation Solution
A display device with a low-brightness front cover made of materials like glass, polycarbonate, or PMMA, featuring a low-brightness layer and adjustable fastening portions that allow for thermal expansion, minimizing visibility of panel boundaries and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a front cover is added to cover front surfaces of display modules, then boundaries between modules are minimized and neighboring modules are protected, but thermal deformation occurs due to material properties and outdoor installation conditions
Solution Approach 1:
The front cover is divided into multiple separate front covers, each corresponding to individual display modules. This segmentation allows each front cover to independently accommodate thermal expansion and contraction without causing deformation to the entire assembly, while still providing comprehensive protection and maintaining a continuous visual appearance when installed.
Solution Approach 2:
The patent specifies that the front cover material should have a thermal expansion coefficient within a particular range to match or complement the display module materials. By carefully selecting materials with appropriate thermal parameters, the front cover can withstand outdoor temperature variations without excessive deformation, maintaining both protection and flatness.
2Area of stationary object
If display modules are arranged in a grid to form digital signage, then large-area displays are achieved, but screen distortion occurs due to level differences between adjacent modules
Solution Approach 1:
The display system is segmented into modular units, each with its own front cover that can be independently adjusted. This allows for level alignment of individual modules while maintaining the overall large display area, preventing distortion caused by cumulative level differences across the entire grid arrangement.
Solution Approach 2:
The front covers are designed with adjustable mounting mechanisms that allow for dynamic level adjustment during installation and maintenance. This enables technicians to adjust the vertical position of individual modules to ensure the entire display surface is flat, while the modular design maintains the large display area.
3Shape
If a front cover is installed to minimize visibility of panel boundaries, then continuous display appearance is achieved, but the front cover material undergoes thermal deformation in outdoor conditions
Solution Approach 1:
The patent specifies that the front cover material should have a thermal expansion coefficient within a particular range to match or complement the display module materials. By carefully selecting materials with appropriate thermal parameters, the front cover can withstand outdoor temperature variations without excessive deformation, maintaining both protection and flatness.
Solution Approach 2:
The front cover may be constructed from composite materials or material combinations that provide both the necessary optical properties for boundary minimization and the thermal stability required for outdoor reliability. This allows simultaneous achievement of continuous appearance and structural stability.
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 a continuous, distortion-free display surface by maintaining the front cover's flatness during thermal deformation, reducing maintenance costs and enhancing viewer experience.
Implementation Method 1
The low-brightness layer may contain a low-brightness color with a transmittance equal to or higher than 20% and equal to or lower than 60% compared to a transparent film
Implementation Method 2
because of a material of the front cover and a fact that the multi-display device is installed outdoors, thermal deformation caused by a temperature difference may occur
Implementation Method 3
the surface-treatment layer may include a layer that has been subjected to a surface treatment of at least one of anti-fog treatment and anti-glare treatment
Data Source
AI summary
A display device of the present invention comprises: display modules; a holding frame for fixing the display modules from the rear surface of the display modules; and a front cover positioned on the front surfaces of the display modules, wherein the front cover may include a low-brightness layer, and boundaries between unit panels of the display modules and boundaries between the display modules are not visible to viewers by virtue of the front cover having a low transmittance, thus making it possible to achieve a large continuous panel.