The Scan Mode And Basic Working Principle Of The LED Display
With the development of LED technology, the brightness of the LED electronic display has continued to increase, and the size is getting smaller and smaller, which indicates that more LED electronic display screens enter the room will become the general trend. However, as the improvement of LED brightness and pixel density also brings new and higher requirements to the control and driving of the LED screen. As far as the interior screen is concerned, the general control methods now use the ranks of control mode, that is, the scanning mode is usually called. At present, the driver mode of the LED electronic display screen has static scanning and dynamic scanning. For static real pixels and static virtual, dynamic scanning is also divided into dynamic real image and dynamic virtual.
In the LED electronic display, the ratio of the number of rows to the entire area at the same time is called the scanning method. The scan is also divided into several driving methods such as 1/2, 1/4, 1/8 sweep, 1/16 sweep. In other words, the driver of the display is different, so the setting of the receiving card is also different. If the receiving card was originally used on a 1/4 scan screen, and now it is now used on the static screen, the display on the display will be lit away everywhere. Generally, the receiving card can be set. Connect to the main devices such as transmission cards, display screens, computers, etc., you can enter the relevant software on the computer for settings. Then let's introduce the scan mode and principles of the LED electronic display.
LED electronic display scanning method:
1. Dynamic scanning: Dynamic scanning is the "point -to -column" control from the output of drive IC to the pixel dots. Dynamic scanning requires a control circuit. The cost is lower than the static scanning Essence
2. Static scanning: Static scanning is the control of "point -to -point" from the output of driving IC to the pixels. Static scanning does not require control circuits. The cost is higher than the dynamic scanning The advantages of smaller and so on.
LED electronic display 1/4 scan mode working principle
In the 1 -frame image, the power supply V1 -V4 is opened for 1/4 according to the control requirements. The advantage of doing this is that it can make more effective use of the display characteristics of LEDs and reduce the cost of hardware. The disadvantage is that in a frame image, each LED can only display one -fourth time.
Classified by scanning by the LED electronic display type
1. The scanning method of indoor full -color LED electronic display: P4 and P5 are constant flow 1/16, P6, P7.62 is 1/8.
2. Scanning method of outdoor full -color LED electronic display: P10 and P12 are 1/2, 1/4, P16, P20, P25 are static.
3. The scanning method of a single and two -color LED electronic display is mainly the constant flow of 1/4, the constant current 1/8 scan, and the constant current 1/16 scan.
