LED display screens typically consist of display modules, control systems, and power systems. The display module is composed of a matrix of LED lights and is responsible for emitting light for display; The control system can display text, images, videos, and other content on the screen by controlling the brightness of the corresponding area. The LED display screen adopts a low-voltage scanning drive, and the power system is responsible for converting the input voltage and current into the voltage and current required by the display screen. The power system uses a switching power supply, which has the characteristics of low cost, small size, light weight, simple peripheral circuit design, high efficiency, low noise, stability and reliability.

1. High frequency transformers are mainly used as high-frequency switching power supply transformers in high-frequency switching power supplies, and are also used as high-frequency inverter power supply transformers in high-frequency inverter power supplies and high-frequency inverter welding machines. According to the working frequency, it can be divided into several levels: 10kHz-50kHz, 50kHz-100kHz, 100kHz-500kHz, 500kHz-1MHz, and above 10MHz.

2. In the design of high-frequency transformers, the leakage inductance and distributed capacitance of the transformer must be minimized because high-frequency transformers in switching power supplies transmit high-frequency pulse square wave signals. During the transient transmission process, leakage inductance and distributed capacitance can cause surge currents and peak voltages, as well as top oscillations, resulting in increased losses.