Display Case Passive Heat Sink for LED Illumination
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Solution Overview
Problem
High-intensity LED backlighting for outdoor LCD digital signage faces challenges in achieving sufficient illumination while managing heat dissipation, leading to overheating issues and increased costs due to bulky and expensive cooling systems.
Innovation Solution
A display case design featuring a metal frame that acts as a heat sink for the LED illumination module, utilizing passive cooling by conducting heat into the ambient environment, and incorporating a diffuser, reflector, and adjustable lens for efficient light distribution, along with optional features like polarizing filters and solar rejection films, to maintain LED safety and reduce installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If large numbers of high-intensity LED backlights are used to achieve sufficient illumination for outdoor LCD digital signage, then illumination intensity is improved, but heat dissipation becomes problematic
Solution Approach 1:
The patent combines the illumination function and heat dissipation function into a single integrated structure. The heat sink structure serves dual purposes: it provides thermal management for the LED array while simultaneously acting as the mounting support structure. This merging eliminates the need for separate cooling components and reduces overall system complexity.
Solution Approach 2:
The heat sink structure performs multiple functions: it conducts heat away from LEDs, provides structural support for mounting the LED array, and serves as a rigid framework for the entire display assembly. This multi-functionality reduces the number of components needed and simplifies the overall design.
2Temperature
If active cooling systems with heat exchangers are used to manage heat dissipation, then temperature control is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the active cooling components (fans, heat exchangers, liquid cooling systems) from the design and replaces them with a passive thermal management approach. By removing these complex active systems and using only the passive heat sink structure, the device complexity is significantly reduced while maintaining adequate temperature control.
Solution Approach 2:
The heat sink structure provides self-service thermal management by naturally conducting heat away from the LEDs through its inherent thermal conductivity and large surface area. The structure serves itself for cooling without requiring external active cooling systems, control mechanisms, or additional energy input.
3Temperature
If active cooling systems with heat exchangers are used to manage heat dissipation, then temperature control is improved, but weight and bulk increase
Solution Approach 1:
The patent combines the illumination function and heat dissipation function into a single integrated structure. The heat sink structure serves dual purposes: it provides thermal management for the illumination module while simultaneously acting as the mounting support structure. This merging eliminates the need for separate cooling components and reduces overall system complexity.
Solution Approach 2:
The heat sink structure performs multiple functions: it conducts heat away from LEDs, provides structural support for mounting the LED array, and serves as a rigid framework for the entire display assembly. This multi-functionality reduces the number of components needed and simplifies the overall design.
4Temperature
If active cooling systems with heat exchangers are used to manage heat dissipation, then temperature control is improved, but installation difficulty increases
Solution Approach 1:
The patent extracts the active cooling components (fans, heat exchangers, liquid cooling systems) from the design and replaces them with a passive thermal management approach. By removing these complex active systems and using only the passive heat sink structure, the device complexity is significantly reduced while maintaining adequate temperature control.
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 solution effectively maintains LED safety, reduces the risk of solar clearing, and lowers costs by using passive cooling and modular design, allowing for easier installation and maintenance, while achieving high-intensity illumination without the need for heavy and expensive active cooling systems.
Implementation Method 1
the illumination module is in thermal communication with at least a part of the metal structure of the frame, and the frame is in thermal communication with the external ambient environment
Implementation Method 2
By having the illumination module in thermal communication with at least a part of the case frame or body the frame may act as a heat sink for the illumination module, thereby enhancing cooling
Implementation Method 3
a diffuser located between the illumination module and the display such that the illumination module illuminates the inner-facing surface of the diffuser
Data Source
Figure 1~3
Figure 4~5
Figure 6(a)~6(b)
AI summary
A display case (100) for illuminating a display, comprising: a frame (110), for holding the display; and an illumination module (130); wherein the illumination module (130) is in thermal communication with at least a part of the frame, and the frame (110) is in thermal communication with the external ambient environment.