Explanation of specialized power supply knowledge for LED display screens
Published by: Dexin Release date：2021-7-29 Reading times：617second
LED power supply, as one of the main devices for LED display screens, is playing an important role in LED display screens. Research data shows that over 80% of fault displays are caused by power sources.
As is well known, LED displays are divided into two usage environments: indoor and outdoor. Indoor LED displays may be noticeable at any time, while outdoor LED displays are less likely to take emergency measures.
In the past, many LED display screen customers chose low output voltage and high current products (such as 5V/60A applications) when choosing power supplies because the working voltage of LED chips was low. Generally, the working voltage of LED chips is 2.8-3.3V for white color Red is 1.8-2.2V Blue is 3.0~3.2V Green is 2.9~3.1V Yellow is 1.8-2.0V, so display manufacturers will use 5V as the main power supply when designing and selecting standard power supplies.
But with the continuous development and innovation of LED component technology, the efficiency of driving ICs is also constantly improving. In the future, the power supply of LED displays will be mainly 4.5V/4.2V. Therefore, we have planned the new generation of commonly used voltages such as 2.5V/3.3V/4V as the standard product series and established a standard product inventory, greatly reducing the difficulties for LED display screen customers in selecting and modifying.
With the rise of the rental LED display market, rental displays have the advantages of small spacing, light weight, thin structure, and quick disassembly/handling/installation. They have been widely used in hotels, exhibition booths, KTV/video conferences and other fields. The specifications of P1.9 and P1.6 for small spacing LED displays have officially become mainstream in the market, and P2.5 is gradually becoming normalized. As the technology of small spacing displays gradually matures, their application scope will be more extensive.
For customers with small spacing and rental display screens who have smaller requirements for power installation space and volume, the HSP/HSN-200/300 series developed by Mingwei can fully meet customers'' design needs for size and height, and quickly become another choice for LED display screen customers on high-quality standard power sources.
In addition, LED displays often malfunction due to factors such as pollution, looseness, vibration, humidity, and temperature changes in their special application environment and usage process. The power supply is the heart of LED displays, and display customers have increasingly high requirements for the reliability of the power supply. Due to unpredictable changes in installation environment, it is recommended to choose products with moisture-proof protection as much as possible for outdoor fixed installation of LED displays.
The quality of the product depends on the merchant, and the customer''s confidence lies in choosing a good merchant. When choosing a dedicated power supply for LED display screens, it is necessary to choose according to the LED display screen you have configured.
So, how to choose an LED display power supply?
Firstly, we only choose power supplies with good appearance, which means that the uniformity of the component array is excellent.
Secondly, check the efficiency of the power supply. Judging the energy-saving level of a power supply is based on efficiency. When fully loaded as a good power source, it must be above 80%. The higher the efficiency, the less active power input.
Thirdly, PFC value is also important as efficiency. The PF value of a power supply without PFC function may be lower than 0.6. A low PF value will increase reactive power and cause significant power loss.
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