1/26/2024 0 Comments Outdoor led panel![]() ![]() After being lit, it will be delayed for a period of time, and then the screen will be black, so as to complete the single chip microcomputer scanning control of the LED display screen in one line, and the single chip microcomputer scanning control of the second line and the third line of the LED display screen The scanning control process is basically the same until the eighth line. According to the arrangement order of the LED dot matrix chips on the screen, the SCM first writes the column drive latch of the first row of LED dot matrix chips to the font data, and then writes the second and third font data of the first row to the font data, until all the font data are written, and then scans the row drive latch of this row, and then lights up the remaining first row with the same method. The control process of the SCM to the LED display screen is to read before writing. ![]() The content displayed on the LED display screen is usually stored in the external data memory of the microcontroller in the form of a font. The driving circuit of LED display screen is usually controlled by a single chip microcomputer, among which 51 series is more common. In the line scanning mode, the same row control pins of the same row of LED lattice chips are on the same line. In the line scan mode, each LED dot matrix has a set of drive circuits, and the column drive circuit also has a lock or shift register to lock the model data of the content to be displayed. Line scanning is more common, and line scanning can be divided into 8 line scanning and 16 line scanning. Dynamic scanning can be divided into line scanning and column scanning. The basic working principle of LED display is dynamic scanning. Operating principle of outdoor LED display The diameter of the copper core of the power cord connecting the unit board is not less than 1mm. The power cord is used to connect the power supply, control card and LED unit board. The transmission line is used to connect the control card and the computer. The data cable is a flat cable used to connect the control card and the LED unit board. It can be divided into data line, transmission line and power line. The card can save information without power, and display the information stored in it without connecting to PC. It should be pointed out that the led display screen belongs to precision electronic equipment, so the switching power supply should be used instead of transformer. The power supply is generally switching power supply with 220V input and 5V DC output. LED module is actually a lattice of many LED light emitting points packaged with resin or plastic. The unit board is composed of LED module, driver chip and PCB circuit board. The quality of unit board directly affects the display effect. Unit board is one of the core components of LED display. What constitutes the outdoor LED display? Outdoor media refers to the media that are set up on the roof of main buildings, in front of the doors of commercial areas, at the roadside and other outdoor sites to release advertising information. Outdoor LED display screen usually appears in the form of outdoor media. It is an indoor and outdoor advertising display equipment with audio and video functions, and is an internationally leading high-tech product. Outdoor LED electronic screen media is the development trend of the advertising industry in the 21st century. 3 Guide for Selecting Outdoor LED Display Models. Operating principle of outdoor LED display.Ĥ. What constitutes the outdoor LED display?Ģ.
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