LCD Heat Dissipation Module with Coolant and Airflow Ducts
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Solution Overview
Problem
The increasing brightness requirements of liquid crystal displays (LCDs) lead to higher heat generation in backlight modules, which can reduce the lifespan of these components due to inadequate heat dissipation.
Innovation Solution
A heat dissipation module comprising a hollow chamber with heat fins, airflow ducts, and cocurrent fans, along with a coolant liquid, is designed to effectively dissipate heat from the lightbar in LCDs, enhancing the module's heat transfer efficiency and extending the lifespan of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the backlight module is increased to meet higher resolution requirements, then the illumination intensity is improved, but the heat generated by the light source increases, leading to poor heat dissipation and reduced lifespan
Solution Approach 1:
The heat dissipation system is segmented into multiple functional components: hollow heat dissipation chambers for each light bar, airflow ducts for directed cooling, cocurrent fans for forced convection, and heat dissipation fins for increased surface area. This segmentation allows targeted heat removal from high-brightness light sources without compromising illumination performance.
Solution Approach 2:
Coolant liquid is introduced as an intermediary substance that fills the space between the light bar and the heat dissipation chamber. The coolant absorbs heat from the light bar through thermal conduction and transports it to the heat dissipation chamber, effectively mediating the heat transfer process and protecting the light source from excessive temperature.
2Illumination intensity
If conventional heat dissipation structures are used with increased brightness backlight modules, then the illumination intensity is improved, but the heat dissipation performance deteriorates, causing reduced component lifespan
Solution Approach 1:
The heat dissipation structure employs a nested configuration where hollow heat dissipation chambers are positioned around each light bar, creating concentric cooling zones. The coolant liquid fills the inner space between the light bar and chamber, while airflow ducts and fans form outer cooling layers. This nested arrangement maximizes heat dissipation efficiency within the limited display thickness.
Solution Approach 2:
The system utilizes pneumatic principles by introducing cocurrent fans that generate forced airflow through the heat dissipation chambers and ducts. This active pneumatic cooling system enhances convective heat transfer, efficiently removing heat from high-brightness light sources and improving overall system reliability.
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 described heat dissipation module effectively removes heat from the lightbar, preventing excessive heat buildup and thereby extending the lifespan of the liquid crystal display while maintaining high brightness levels.
Implementation Method 1
a coolant liquid filled between outer walls of the airflow ducts and an inner wall of the heat dissipation chamber
Implementation Method 2
a plurality of first heat dissipation fins arranged on a side surface of the heat dissipation chamber and extending to outside of the heat dissipation chamber
Implementation Method 3
a plurality of pairs of cocurrent fans arranged on the two end surfaces of the heat dissipation chamber to respectively correspond to the two ends of the plurality of airflow ducts
Data Source
AI summary
The present invention provides a heat dissipation module and a liquid crystal display. In the heat dissipation module of the present invention, a plurality of airflow ducts (13) are arranged in an interior space of a heat dissipation chamber (11) with two ends of the plurality of airflow ducts (13) being respectively connected to two end surfaces of the heat dissipation chamber (11) and internal spaces of the plurality of airflow ducts (13) set in communication with the outside of the heat dissipation chamber (11), and further, a plurality of pairs of cocurrent fans (14) are provided on the heat dissipation chamber (11) to respectively correspond to the two ends of the plurality of airflow ducts (13) and a coolant liquid (15) is filled between outer walls of the airflow ducts (13) and an inner wall of the heat dissipation chamber (11) so that the heat dissipation module is applicable to a liquid crystal display to effectively dissipate heat generated by a lightbar and thus extend the lifespan of the liquid crystal display.