time：2022-01-10 source：ZJ Lighting Views：147
Nowadays, LED display screens are widely used in various places and become an important carrier of visual display. However, due to the uneven R&D and production technology of various brand manufacturers, blind lights and black screens are often seen, which is very important. Part of the reason lies in the heat dissipation performance.
When choosing a heat dissipation method, the following factors should be considered: heat flow density, volume power density, total power consumption, surface area, volume, working environment conditions (temperature, humidity, air pressure, dust, etc.) of the led display. According to the heat transfer mechanism, there are natural cooling, forced air cooling, direct liquid cooling; evaporative cooling; thermoelectric cooling; heat pipe heat transfer and other heat dissipation methods.
The heat dissipation design of the led display is very important. Due to the heat exchange area between the heating electronic parts and the cold air, the temperature difference between the heating electronic parts and the cold air will directly affect the heat dissipation effect. The design of the air volume entering the LED display box is more critical. When designing ventilation ducts, try to use straight ducts to transport air and avoid sharp bends and bends. Ventilation ducts should avoid sudden expansion or sudden contraction. The expanded opening angle should not exceed 20o, and the contracted cone angle should not exceed 60o. The ventilation ducts should be sealed as far as possible, and all overlaps should follow the direction of flow.
Long-term and heavy-load operation is the primary reason for the huge heat dissipation of the internal structure of most LED displays. The quality of heat dissipation directly affects the life and work efficiency of the display module. Generally speaking, according to the way the heat is taken away from the radiator, it can be divided into active heat dissipation and passive heat dissipation. Active heat dissipation is the use of fans and other heat dissipation devices to forcibly take away the heat emitted by the heat sink; the so-called passive heat dissipation means that the heat of the large screen splicing light source is naturally released into the air through the heat sink, and its heat dissipation effect is similar to that. The size of the heat sink is proportional.
At present, the heat dissipation of high-brightness LED full-color screens on the market usually adopts natural heat dissipation. Under the background of similar heat dissipation methods, Lexian pursues breakthroughs in details:
1. Intelligent dimming system. Through the background control system, the LED display can be intelligently dimmed according to the time period and ambient brightness, which can reduce energy consumption and heat emissions while playing a role in energy saving and emission reduction.
2. Increase the heat dissipation capacity and reduce the accumulated temperature by increasing the surface area of the heat dissipation source and the structure of the product.
3. In the design of the internal structure of the LED display, a more transparent design idea is adopted, especially the outdoor display, which can play a role in rapid heat dissipation.
Shanghai Lexian relies on its own set of heat dissipation solutions, combined with the use of high-quality materials, to effectively control the overall temperature rise, and can always maintain a low failure rate under long-term high-load operation.