Display Assemblies With Closed-Loop Turbulent Flow Cooling
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Solution Overview
Problem
Display assemblies generate heat due to solar loading and internal component operation, necessitating efficient thermal management, especially in outdoor applications, while also requiring efficient manufacturing processes.
Innovation Solution
The display assemblies feature multiple electronic display subassemblies mounted on opposing sides with closed loop fan units inducing turbulent flow in a common rear passageway and laminar flow in front and illumination device passageways, using identical subassemblies to simplify manufacturing and enhance heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple electronic display subassemblies are mounted on opposing sides with common rear passageway, then heat exchange efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple display subassemblies into a single integrated unit with a common rear passageway and shared fan units. This consolidation allows heat from multiple displays to be exchanged through a unified thermal management system, improving overall heat exchange efficiency while the modular design maintains manageable complexity levels.
Solution Approach 2:
The common rear passageway and fan units serve multiple functions: they provide thermal management for multiple display subassemblies simultaneously, enable turbulent flow for enhanced heat exchange, and maintain a flat electronic display layer. This multi-functionality improves heat exchange efficiency without proportionally increasing device complexity.
2Loss of energy
If closed loop fan units induce turbulent flow in rear passageway, then heat exchange efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the flow regime parameter from laminar to turbulent flow in the rear passageway by using closed loop fan units. This parameter change significantly improves heat exchange efficiency. The turbulent flow is achieved through strategic fan placement and passageway geometry rather than complex active control systems, keeping manufacturing relatively simple.
3Productivity
If identical subassemblies are used for opposing sides, then manufacturing efficiency is improved, but thermal management complexity increases
Solution Approach 1:
Identical subassemblies are designed to perform multiple thermal management functions simultaneously. Each subassembly can operate independently for its side while also contributing to the common rear passageway thermal exchange system. This universality allows manufacturing efficiency through standardization while the integrated thermal design manages the complexity of thermal management across both sides.
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
This configuration improves heat exchange efficiency and maintains a flat electronic display layer for improved optics, while allowing for efficient thermal management and manufacturing.
Implementation Method 1
Each of the subassemblies may be configured to provide a relatively turbulent flow within a rear passageway common to at least two, or all, of the multiple subassemblies
Implementation Method 2
Each of the subassemblies may be configured to provide a relatively laminar flow through one or both of a front passageway and an illumination device passageway
Implementation Method 3
Display assemblies often generate heat, such as from solar loading, ingestion of relatively warm ambient air, and/or powering of internal components such as a backlight
Data Source
AI summary
Display assemblies are provided which include subassemblies attached to a structural framework, each including a passageway and at least one of which also includes an electronic display layer, an illumination device, and a forward cover. A closed loop airflow pathway for circulating gas is formed by a rear passageway behind the subassemblies and the passageway of each subassembly. Fan units associated the subassemblies and positioned to cause flow of the circulating gas within the passageways of the respective subassemblies in a respective direction.