LCD Heat Pipe Cooling for Outdoor Display Reliability
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) designed for indoor use are not suitable for outdoor installation as they are not protected from weather and dust, leading to increased temperature due to heat generation and sunlight, which degrades the liquid crystal's functionality and can result in a 'black out' condition.
Innovation Solution
A display apparatus comprising a flat display panel sealed in a housing with aeration paths and heat pipes that extend from the rear surface to the outside, allowing heat to escape and maintaining a stable temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LCD is sealed in a housing to protect from weather and dust, then the protection from weather and dust is improved, but the heat dissipation deteriorates
Solution Approach 1:
The housing is segmented into a sealed portion for protecting the LCD from weather and dust, and a separate heat dissipation portion with heat pipes and aeration paths. This segmentation allows the housing to simultaneously provide protection and heat dissipation without compromising either function.
Solution Approach 2:
Heat pipes are introduced as an intermediary thermal conduction component between the LCD rear surface and the external environment. The heat pipes efficiently transfer heat from the sealed housing interior to the exterior heat dissipation structure, resolving the contradiction between sealing and heat dissipation.
2Reliability
If the LCD is sealed in a housing, then the protection from weather and dust is improved, but the natural air cooling deteriorates
Solution Approach 1:
Heat pipes serve as an intermediary thermal management system that replaces the need for natural air cooling within the sealed housing. By conducting heat directly through the heat pipes to external heat dissipation structures, the system eliminates dependence on air circulation while maintaining protection.
Solution Approach 2:
The natural convection-based air cooling system is replaced with a phase-change-based heat pipe system. This substitution provides more reliable and efficient heat dissipation that is not dependent on air flow conditions, thereby improving ease of operation in various environmental conditions.
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 effectively prevents 'black out' conditions by ensuring the LCD remains cool through efficient heat dissipation, enabling reliable outdoor operation of LCDs.
Implementation Method 1
one or a plurality of heat pipes. The heat pipes extend from a rear surface of the display panel to the aeration path
Data Source
AI summary
A display apparatus includes a liquid crystal display having a display panel, a housing, and a plurality of heat pipes. The housing has a sealing part and has aeration paths. The sealing part seals the display panel to box the display panel therein, while making a display screen of the display panel viewable from outside. The aeration paths are arranged outside the sealing part and communicate with the outside of the housing. The heat pipes extend from a rear surface of the display panel to the aeration paths.