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Methods for driving and controlling LED displays

 - Methods for driving and controlling LED displays

As an emerging media and information platform, LED displays are increasingly used in commercial advertising, government announcements, sports events, conferences and exhibitions, among others. LED displays must be driven and controlled in an efficient and reliable manner in order to display normally. To help readers better understand and use LED displays, this article will describe how they are driven and controlled.

 - Methods for driving and controlling LED displays

A. LED display driving principle

Dot-matrix display technology is the driving principle of LED displays. A variety of content, such as text, pictures, and videos, can be displayed by controlling the brightness and color of the LED. LED displays can be divided into static drive and dynamic drive under normal circumstances.

A static drive is achieved by controlling the brightness and color of LEDs. Among its main characteristics are simplicity, reliability, and stability, but the gray level is not high, so it cannot achieve high quality displays. It is generally suitable for displaying simple text, numbers, graphics, and other static content.

Dynamic drive: LEDs are driven dynamically by controlling their refresh rate and brightness. The main feature of this display is the high gray level, which allows for a more delicate, smooth display effect, making it suitable for displaying high-quality text, images, videos, and other dynamic content. However, it is more complex and stable than static drives.

 - Methods for driving and controlling LED displays

B. LED display control method

LED displays are controlled mainly by the following methods:

Serial communication control: Serial communication control is a serial communication protocol based on LED display control mode. Its characteristics include fast data transmission speed, high reliability, high gray level, multilevel connection and so on. The most common serial communication protocols are SPI, I2C, DMX512, and so on. It is possible to achieve a variety of display effects through serial communication control mode, including static display, dynamic display, color gradient, flicker, and so on.

LED display control based on parallel communication protocol is known as parallel communication control. Data transmission speed is fast, reliability is high, and large capacity data transmission is supported. RGB, TTL, LVDS, and other parallel communication protocols are common. High quality display effects can be achieved through parallel communication control mode.

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