Outdoor Display Cooling via Segmented Airflow and Heat Exchange
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Solution Overview
Problem
Outdoor display devices face temperature-related deterioration due to direct sunlight exposure, leading to large temperature deviations and optical reliability issues caused by internal air circulation limitations in conventional heat dissipation structures.
Innovation Solution
A display device with a housing featuring dual vents for air intake and exhaust, multiple cooling flow paths, and blowers to generate airflow, along with a heat exchanger and temperature sensors to control airflow directions based on temperature readings across four quadrants, ensuring efficient heat exchange and uniform cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If internal air circulation cooling structure using convection flow on the front of the display panel is used, then heat dissipation is achieved, but large temperature deviation occurs causing sheet wrinkles and deteriorating optical reliability
Solution Approach 1:
The housing internal space is divided into multiple cooling areas (first, second, third, and fourth cooling areas) with dedicated temperature sensors and airflow control for each area. This segmentation allows independent temperature management in each region, preventing large temperature deviations that cause sheet wrinkles while maintaining effective heat dissipation across the entire display panel.
Solution Approach 2:
The cooling system dynamically adjusts airflow directions and magnitudes based on real-time temperature readings from multiple sensors. The control unit varies the operation of blowers and adjusts airflow paths according to the detected temperature distribution, enabling adaptive temperature control that prevents optical reliability deterioration while maintaining efficient heat dissipation under varying thermal conditions.
2Temperature
If conventional internal air circulation cooling is used, then cooling function is provided, but temperature uniformity deteriorates leading to sheet wrinkles
Solution Approach 1:
Different cooling strategies are applied to different regions of the display panel based on local temperature conditions. Each cooling area has its own temperature sensor and is controlled independently, allowing localized airflow adjustment to achieve uniform temperature distribution across the panel and preventing sheet wrinkles caused by temperature non-uniformity.
Solution Approach 2:
Temperature sensors in each cooling area provide real-time feedback to the control unit, which adjusts the airflow magnitude and direction accordingly. This closed-loop feedback control ensures temperature uniformity is maintained by continuously monitoring and adjusting cooling performance in each region, preventing sheet wrinkles while providing effective cooling.
3Reliability
If multiple cooling flow paths and blowers are added to improve temperature uniformity, then optical reliability is maintained, but device complexity increases
Solution Approach 1:
The control unit serves multiple functions by managing both temperature monitoring and airflow control across all cooling areas. The housing structure integrates multiple cooling flow paths and sensor placements that work together as a unified system. This multi-functionality approach maintains optical reliability through comprehensive temperature control while managing device complexity through integrated design and centralized control logic.
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 enhances cooling efficiency, prevents sheet wrinkles, and maintains optical reliability by adjusting airflow directions to manage temperature variations across the display panel, providing effective heat dissipation and uniform cooling.
Implementation Method 1
a heat exchanger disposed behind the display panel, wherein the heat exchanger comprises a first channel in which a part of the first cooling flow path is formed and a second channel intersecting the first channel and in which a part of the second cooling flow path is formed
Implementation Method 2
an internal air circulation cooling structure using a convection flow on the front of the display panel
Data Source
AI summary
A display device including: a housing including a first vent through which external air is introduced and a second vent through which the introduced external air flows out; a display panel disposed inside the housing and configured to transmit an image forward; a first flow path formed inside the housing; a first blower configured to exchange heat with the display panel and generate an airflow flowing in the first cooling flow path; a second cooling flow path intersecting the first cooling flow path in communication with the first vent and the second vent and formed inside the housing; a second blower configured to generate an airflow flowing in the second cooling flow path; and a heat exchanger positioned behind the display panel, wherein the heat exchanger includes a first channel in which a part of the first cooling flow path is formed and a second channel intersecting the first channel and in which a part of the second cooling flow path is formed.