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In the LED display this bright visual display field, the power supply plays a vital role, as if the heart for the whole system to deliver a constant flow of energy, is to ensure that the LED display stable, efficient operation of the key factors. LCF editor will introduce the LED display power supply in this article for you.

First, the basic principle of LED display power supply

The core working principle of LED display power supply is to convert the input alternating current (AC) into direct current (DC) suitable for LED display. This conversion process is mainly through the rectifier, filter, voltage regulator and other circuit links to achieve. First of all, the rectifier circuit will be converted to dc, but at this time the dc contains more ac components, known as pulsating dc. Next, the filter circuit processes it to remove the AC components and make the voltage smoother. Finally, the voltage regulator circuit ensures that the output voltage can remain stable under various load conditions, providing a stable and reliable power supply for LED display to meet the specific requirements of LED lamp beads on voltage and current.

Second, the importance of LED display power supply

1, guarantee the stability of the display effect

LED display needs stable power supply to maintain its normal display function. The fluctuation of power supply voltage will directly affect the brightness and colour performance of LED lamp beads. If the power supply voltage is too high, it may lead to LED lamp beads too bright, serious heat, or even damage; while the voltage is too low will make the display brightness is insufficient, uneven display and other problems. Stable power supply can ensure that the LED display in the process of long-time operation, always maintain a clear, uniform visual effect, whether in the playback of dynamic video, display static images or scrolling text, can present high-quality images for the audience.

2, extend the service life of the display

The life of LED lamp beads and other electronic components is closely related to the quality of the power supply. High-quality LED display power supply can provide stable current, to avoid the current impact on the LED lamp beads caused by damage. In addition, good power supply design can also effectively control the power supply internal heating, reduce overheating caused by component aging and damage, thus extending the service life of the entire LED display, reduce the use of cost and maintenance frequency.

Third, the type of LED display power supply

1, according to the output voltage classification

5V power supply: this is a common type of power supply in the LED display, suitable for small indoor LED display or lower voltage requirements of the module. 5V power supply can meet the power supply needs of some low-power LED lamp beads, has the characteristics of low cost and high efficiency, widely used in some simple information display screen.

12V power supply: commonly used in some of the higher brightness and power requirements of the LED display, such as outdoor advertising screen, large indoor display screen, etc. 12V power supply can provide enough energy for more LED lamp beads, stronger driving ability, but accordingly, the power supply design and manufacturing requirements are also higher to ensure its safety and stability.

Other voltage level power supply: In addition to 5V and 12V power supply, according to different LED display design and application scenarios, there are some special voltage level power supply, such as 24V, 48V, etc. These power supplies are mainly used to meet specific engineering requirements or complex display systems.

2、Classified according to the function of power supply

Constant voltage power supply: the output voltage of this kind of power supply remains constant and does not change with the change of load. In LED display, constant voltage power supply is mainly used to supply power for multiple parallel LED modules, as long as the total power of the load is within the rated power of the power supply, it can ensure that each module obtains a stable voltage, so as to achieve stable display effect.

Constant current power supply: Constant current power supply is characterised by constant output current. For LED beads or modules connected in series, constant current power supply is the ideal choice. Because the current in the series circuit is equal everywhere, the constant current power supply can ensure that the current through each LED lamp bead is the same, to avoid the individual lamp bead current is too large or too small and the brightness is inconsistent or damaged, especially suitable for the colour consistency and brightness uniformity requirements of high end LED display.

Fourth, the key technical indicators of LED display power supply

1, output power

Output power is an important indicator of the LED display power supply, it determines the power supply for how many LED lamp beads or module power supply. When choosing power supply, you need to determine the appropriate power supply output power according to the total power requirements of the LED display. Generally speaking, the output power of the power supply should be slightly greater than the actual power of the display, to ensure a certain power redundancy, to ensure that the display can operate normally in a variety of complex working conditions.

2, efficiency

Power supply efficiency reflects the ability of the power supply to convert input power into output power. High-efficiency power supply can reduce the loss of power in the conversion process, reduce the power supply itself heat, improve energy efficiency. In large-scale LED display applications, high power supply efficiency not only saves energy costs, but also reduces the pressure of thermal design and improves the reliability of the whole system.

3, ripple voltage

Ripple voltage is the residual AC component in the output DC voltage. Ripple voltage is too large will have a negative impact on the display effect of the LED display, such as causing the screen flicker, noise and so on. High quality LED display power supply should have a low ripple voltage, through the optimisation of filter circuits and other technical means, the ripple voltage control in the allowable range, in order to ensure the image quality of the display.

Fifth, the development trend of LED display power supply

With the continuous development of LED display technology, the power supply also put forward higher requirements and challenges, the development trend is mainly reflected in the following aspects.

1, higher efficiency and power density

The future of the LED display power supply will be towards the direction of higher efficiency and power density. Through the use of new switching power supply technology, more advanced power devices and optimised circuit topology, to further improve the conversion efficiency of the power supply, while reducing the size and weight of the power supply, so that it can provide a greater power output in a smaller space, to meet the LED display to thin and light, the development of high brightness demand.

2、Intelligent and digital

Intelligent and digital will become an important development trend of LED display power supply. Power supply will have more intelligent functions, such as remote monitoring, fault diagnosis, automatic adjustment of output parameters. By combining with the internet of things technology, users can remotely through the network of power supply operation status for real-time monitoring and management, timely detection and treatment of power supply failure, improve system maintenance efficiency and reliability. At the same time, the application of digital control technology can make the output of the power supply more accurate and stable, better adapted to different types of LED display and complex application environment.

3, better compatibility and reliability

In order to adapt to the market a variety of LED display modules and systems, power supply will pay more attention to compatibility. Future power supply will be able to compatible with different voltages, different power, different types of LED loads, reduce the failure caused by compatibility problems. In addition, improve the reliability of the power supply is still the focus of the development, by improving the power supply heat dissipation design, strengthen the protection circuit (such as over-voltage protection, over-current protection, short-circuit protection, etc.), to further extend the service life of the power supply, to ensure that the LED display can be a long-term stable operation.

In short, LED display power supply as the energy core of the whole display system, play an irreplaceable role in guaranteeing the display effect, extend the service life and so on. With the continuous progress of technology, its performance will continue to improve, to better meet the LED display increasingly diversified and high-end development needs, to bring us a more colourful visual experience.

The above is the LCF editorial to sort out the LED display power supply related content, I hope to help you, and welcome you to add or correct.LCF is a collection of research and development, intellectual property, sales, operation and service in one of the national speciality and speciality of the small giant enterprises, national high-tech enterprises. If you need to buy LED electronic display friends can also directly contact the LED display manufacturer LCF, the big country brand, trustworthy!