The world of LED display power supply, understand the knowledge of LED display power supply!
What is led display screen power supply
As one of the main devices of LED display, LED display power supply is playing an important role in LED display. Research data show that more than 80% of the fault display is caused by the power supply.
As we all know, LED display is divided into indoor and outdoor two kinds of use environment, indoor relative outdoor LED display may be detected at any time, and outdoor can not take timely response measures.
In the past, when many LED display screen customers choose power supply, the reason why they choose low output voltage and high current products ;the display screen manufacturers choose standard power supply in design 5V will be selected as the main power supply.
In view of the small space and rental display screen customers’ demand for power installation space and volume, such as the a-200dg series and a-200fbk series developed by Chuanglian can fully meet the customers’ design needs for size and height, and quickly become another choice for LED display screen customers in high-quality standard power supply.
Characteristics of LED display power supply
High quality LED display power supply generally has the following characteristics:
1. High reliability: many LED displays are installed at high altitude, so the maintenance of power supply is inconvenient and the maintenance cost is large;
2. High efficiency: LED display is an energy-saving product, and the efficiency of display power supply should be high. The efficiency of the power supply is high, the power consumption is small, the calorific value is small, and the temperature is reduced;
3. High power factor: power factor is the requirement of power grid for load. Although the lower power factor of a small single consumer has little impact on the power grid, if the same kind of load is too concentrated, it will cause serious pollution to the power grid;
4. Surge protection: the anti surge ability of LED display is poor, especially the anti reverse voltage ability. It is also important to strengthen protection in this area. Some LED displays are installed outdoors, such as outdoor advertisements on high-rise buildings. Due to the start-up and rejection of power grid load and the induction of lightning, all kinds of surges will invade from the power grid system, and some surges will lead to the damage of LED display screen. Therefore, the LED display power supply should have the ability to restrain the invasion of surge and protect the LED display from being damaged;
5. Protection function: in addition to the conventional protection function of LED display power supply, it is recommended to add negative temperature feedback in the power output to prevent the temperature from being too high, and meet the requirements of safety regulations and electromagnetic compatibility;
6. Good temperature characteristics (high): the high power density and the influence of winter and summer environment temperature can not make the LED display power work abnormally;
7. Good humidity characteristics (high): to withstand the test of high humidity weather such as sauna days;
8. Good anti-interference (high): lightning, over-voltage, over-current and other grid fluctuations can not damage the LED display power.
How to choose high quality LED display power supply
LED display power supply is an important part of the power supply system. Choosing a qualified and reliable power supply can significantly improve the energy-saving effect and service life of LED display, so how to correctly identify and choose a qualified LED display power supply?
1. Appearance process: a good LED display power supply manufacturer is also very strict with its working process, because only in this way can the batch consistency of products be guaranteed;
2. Full load efficiency: the efficiency of LED display power supply is the most important index. The energy conversion rate of LED display power supply with high efficiency is high, which meets the requirements of energy conservation and environmental protection, and can actually save power and money for users;
3. Output voltage ripple: the ripple size has a great impact on the life of LED display devices, the smaller the ripple, the better;
4. Observe the temperature rise when the power supply works: the temperature rise affects the stability and life of the LED display power supply. The lower the temperature rise, the better the temperature rise. In addition, from the aspect of efficiency, it can be seen that the temperature rise will be small if the efficiency is high;
5. Due to the properties of LED display screen products, when playing video or picture, it usually produces instantaneous change of current, which puts forward more strict requirements for LED display screen power supply. Usually, in order to ensure the normal broadcast of the display screen, it is necessary to reserve a certain margin for the display screen power supply products. Generally speaking, the more margin reserved, the more stable the performance of power products, the longer the life, but this will increase the cost of LED display power products, too much margin reserved is also easy to cause waste. At present, the industry’s LED display power supply is generally reserved 20% – 30% margin;
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