Sealed Display Cooling via Segmented Chamber Convection
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Solution Overview
Problem
Highly sealed display apparatuses for outdoor use face challenges in heat dissipation due to inhibited air circulation, which can lead to reliability issues with high-brightness liquid crystal modules and heat-generating components.
Innovation Solution
A display apparatus design that includes a liquid crystal module, circuit boards, a case, a frame, and blower fans to create a sealed chamber with a cooling apparatus that divides the chamber into two sections, allowing for gas circulation and heat dissipation through convection, using a metal case with thermal radiation-enhancing coatings and sealing members to maintain a high level of sealing while facilitating heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display apparatus is highly sealed to prevent moisture and dust intrusion, then reliability is improved, but heat dissipation performance deteriorates due to inhibited air circulation
Solution Approach 1:
The sealed chamber is divided into multiple sub-chambers (first chamber, second chamber, third chamber) using partition walls. This segmentation allows independent thermal management in each region while maintaining overall sealing, enabling heat dissipation paths without compromising protection against moisture and dust.
Solution Approach 2:
Heat dissipation fins are introduced as intermediary structures between the heat-generating components and the external environment. These fins increase the heat transfer surface area within the sealed chamber, facilitating thermal radiation and convection to the surrounding air without requiring direct openings in the sealed case.
2Illumination intensity
If high-brightness liquid crystal modules are used to improve display performance, then illumination intensity is improved, but heat generation increases causing reliability issues
Solution Approach 1:
Different regions of the sealed chamber are designed with different thermal management characteristics. The first chamber housing the liquid crystal module includes specific heat dissipation structures and air flow paths tailored to the high heat generation of the display module, while other chambers have different configurations suited to their components' thermal requirements.
Solution Approach 2:
The patent incorporates fans to create dynamic air circulation within the sealed chamber. This dynamic cooling system actively moves air through heat-generating components, providing adaptive cooling that responds to thermal conditions and maintains reliability of high-brightness display modules.
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 design effectively prevents local overheating and enhances cooling efficiency by circulating air between chambers, ensuring reliable operation of heat-generating components and maintaining even temperature distribution within the sealed case.
Implementation Method 1
A display apparatus design that includes a liquid crystal module, circuit boards, a case, a frame, and blower fans to create a sealed chamber with a cooling apparatus that divides the chamber into two sections, allowing for gas circulation and heat dissipation through convection
Implementation Method 2
using a metal case with thermal radiation-enhancing coatings and sealing members to maintain a high level of sealing while facilitating heat transfer
Data Source
AI summary
A display apparatus is provided including a liquid crystal module which displays an image, at least one circuit board which controls the liquid crystal module, and a case which accommodates the liquid crystal module and the at least one circuit board therewithin, wherein the case is sealed such that gas cannot be transmitted therethrough.