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Principle of Scanning Mode of Led Display

　　LED display scanning method principle

With the rapid development of the LED display industry and the continuous development of LED technology, the brightness of the LED display has also been continuously improved, and the size is getting smaller and smaller, which indicates that more LED displays will become large when entering the room. trend. However, due to the im

provement of LED brightness and density, new and higher requirements have been brought to the control and drive of LED display screens. Nowadays, the general indoor LED display screens adopt the row-column sub-control mode, which is commonly referred to as the scanning mode. At present, the driving modes of the LED electronic display screen are static scanning and dynamic scanning, and static scanning is divided into Static real pixels and static virtual, dynamic scanning is also divided into dynamic real image and dynamic virtual.

　　In the LED display screen, the ratio of the number of lines that are lit at the same time to the number of lines in the entire area is called the scanning mode. The scanning is also divided into 1/2 scan, 1/4 scan, 1/8 scan, 1/16 scan and other driving modes. It can also be said that the driving mode of the display screen is different, so the setting of the receiving card is also different. If the receiving card was originally used for 1/4 scan evaluation, but now it is used on a static screen, the display on the screen will light up every 4 lines. Generally, the receiving card can be set up. After connecting the sending card, display screen, computer and other main devices, you can enter the relevant software on the computer to set it up. Then, let's first introduce the scanning mode and principle of the LED display.

　　1. LED display scanning method

(1) Dynamic scanning: Dynamic scanning implements "point-to-column" control from the output of the driver IC to the pixel points. Dynamic scanning requires a control circuit, and the cost is lower than static scanning, but the display effect is poor and the brightness loss is relatively low. Big.

(2) Static scanning: Static scanning implements "point-to-point" control from the output of the driver IC to the pixels. Static scanning does not require a control circuit, and the cost is higher than dynamic scanning, but the display effect is good, the stability is good, and the brightness is good. Advantages such as less loss.

　　2. LED display 1/4 scan mode working principle

　　 The working principle of the 1/4 scan mode of the LED display screen is that the power supply V1-V4 of each line in a frame of image is turned on for 1/4 of the time according to the control requirements. The advantage of this is that the LED display characteristics can be used more effectively and the hardware cost can be reduced. The disadvantage is that within 1 frame of image, each row of LEDs can only display 1/4 of the time.

　　3. according to the LED display type scanning method classification

　　 (1) Scanning method of indoor full-color LED display: P4 and P5 are constant current 1/16, P6 and P7.62 are constant current 1/8.

　　 (2) Scanning method of outdoor full-color LED display: P10, P12 are constant current 1/2, 1/4, P16, P20, P25 are static.

　　 (3) The scanning methods of single and double color LED display are mainly constant current 1/4 scan, constant current 1/8 scan, and constant current 1/16 scan.

The principle of the scanning method of the led display _ what does the p of the led display stand for

　　What does the p of the led display stand for

　　 P in the LED display screen refers to the center distance between two adjacent pixels of the LED display screen, referred to as the dot pitch.

　　 1. For example, a P10 LED display, the distance between two adjacent lamp beads and the center of the lamp beads is 10mm

　　 2. P10 can't see the granular shape on the screen 10 meters away, that is, you can't see the lamp beads, the same P6 is that the picture is not distorted 6 meters away.

　　 3. Under normal circumstances, the denser the lamp beads, the clearer the LED display, and the higher the resolution, the higher the price.