Most commonly used interfaces: Yellow interface T08, is generally connected to indoor F3.75, F5.0 unit board black interface T12, is generally connected to P10 single and two-color unit board blue interface T75, is generally connected to full-color 75-interface unit board, the current mainstream interface of full-color unit board is 75 interface and 320 interface (small spacing) We take the Inverang BX-6S1 as an example, The functions of each interface are as follows:
LED Display Control System (LED Display Control System), also known as LED display controller, LED display control card. It is the core component of the LED display, mainly responsible for receiving the screen and video display information from the computer serial port or DVI interface, placed in the frame memory, according to the partition drive mode to generate the serial display data and scan control timing that the LED display can recognize.
01 Classification of the control system
Asynchronous control system:
LED display asynchronous control system is also known as LED display offline control system or offline card. It is mainly used to display various characters, symbols and graphics or animations. The screen display information is edited by the computer, and the frame memory of the LED display is pre-placed through the RS232/485 serial port, and then the screen is displayed and played, and the display mode is colorful and varied. Its main features are: simple operation, low price, wide range of use. LED display simple asynchronous control system can only display digital clock, text, special characters. LED display graphic asynchronous control system in addition to the function of a simple control system, the biggest feature is that you can control the content of the display screen by region. Support analog clock display, countdown, picture, table and animation display. With timing switch, temperature control, humidity control and other functions.
Synchronous control system:
LED display synchronous control system, mainly used to display real-time video, graphics, notifications and so on. Mainly used for indoor or outdoor full-color large-screen display. LED display synchronous control system control LED display work mode is basically equivalent to the computer monitor, it at least 60 frames/second update rate dot corresponding real-time mapping computer monitor images, usually with multi-gray color display ability, can achieve multimedia advertising effect. Its main characteristics are: real-time, rich expression, more complex operation, high price. A set of LED display synchronous control system is generally composed of a sending card, a receiving card, and a DVI graphics card.
02 Control card classification
There are many kinds of control cards on the display screen, and there are many companies that produce control cards, such as Moshe, Ling Star Rain, Zhongqing, Yangbang, Yukuo, Jinhan and so on. Simply put, it is divided into: full-color synchronous card asynchronous offline card Full-color video offline card.
With the rapid development of LED display in the past two years, the LED control card market has become more extensive, especially in 2009 just newly raised U disk LED control card is currently used the most, available serial port connection computer, can also use U disk transfer information, save computer, no wiring, support analog clock, water border, U disk LED control card can save computer, save wiring.
Type C card (partition card) (U disk and serial port dual communication function) 1, support 4 sweep, 8 sweep, 16 sweep of a variety of indoor, outdoor, semi-outdoor single and two-color display board, a card can be arbitrarily set. 2, support water border and analog clock function, more prominent display content. 3, the maximum controllable range of monochrome 114688 points, two-color points halved, while built-in 4 08 interfaces and 4 12 interfaces, can be extended to 8 interfaces. 4, display function: support text, pictures, animation, EXCEL tables, time, temperature, reverse (positive) timing, etc. 5, can be used to make door screen, poster screen, car screen and other various models of screen. 6, set the lock screen function, built-in 4 groups of timing switch time segment, can be set at will.
E type card (time partition) (U disk and serial port dual communication function) 1, support 4 sweep, 8 sweep, 16 sweep, support a variety of indoor, outdoor, semi-outdoor single and two-color display board, a card can be arbitrarily set. 2, the maximum controllable range of monochrome 40960 points, two-color points halved, built-in 3 08 interfaces and 3 12 interfaces, can be extended to 8 interfaces. 3, display function: text, pictures, animation, time, temperature, reverse (positive) timing, etc. 4, can be used to make door screen, poster screen, car screen and other various models of screen. 5, set the lock screen function, built-in 4 groups of timing switch time segment, can be set at will. 6, with serial communication and U disk input information dual functions. 7, support a U disk to manage multiple display functions, convenient multi-screen centralized management. G card (serial communication function) 1, as above, support 4 sweep, 8 sweep, 16 sweep of a variety of indoor, outdoor, semi-outdoor single and two-color display board, a card can be arbitrarily set. 2, support water border and analog clock function, more prominent display content. 3, the maximum controllable range of monochrome 114688 points, two-color points halved, built-in 4 08 interfaces and 4 12 interfaces, can be extended to 8 interfaces.
F-type card (time partition) (serial communication function) 1, support 4 sweep, 8 sweep, 16 sweep of a variety of indoor, outdoor, semi-outdoor single and two-color display board, a card can be arbitrarily set. 2, the maximum controllable range of monochrome 40960 points, two-color points halved, and built-in 3 08 interfaces and 3 12 interfaces, can be extended to 8 interfaces. 3, display function: text, pictures, animation, time, temperature, reverse (positive) timing, etc. 4, can be used to make door screen, poster screen, car screen and other various models of screen. 5, set the lock screen function, built-in 4 groups of timing switch time segment, can be set at will. 6, with serial communication function. According to different needs, you can use the serial port to connect the computer, you can also use the USB flash drive to transfer information. The use of U disk control card can save the computer, provincial wiring, controllable 100,000 points, a card.
03 Classification of control system modes
Array control system, LED full color display control system. The “array” control system consists of a main control board, a number of sub-control boards and a number of scanning boards installed in the display box, which is equivalent to a set of control system used in each box for control, the use of this structure fully improves the reliability of the display screen and the display effect, and the effect is more obvious. It is a good solution to the problems such as low frame change frequency, insufficient gray level and poor color uniformity when the high-end LED display plays video. By the expert committee appraisal organized by the Science and Technology Bureau, the technology has reached the level of domestic leading and international similar products.
The birth of this generation of control system has improved the technical advantages of Yuanheng Optoelectronics in screen control, and further improved the processing technology of display signals.
After using the “array” control system, first of all, the frame change frequency of the display screen can be increased from about 60Hz to more than 120Hz, which is far greater than the human eye resolution, so that people do not have any stabs and water ripples when watching, improving the quality of the display. Secondly, the gray level of the red, green and blue primary colors of the display can be increased from 256 to 1024 levels, making the color more vivid, better color reduction, and more real images displayed. Finally, the LDVS signal is used for transmission, which maximizes the loss of the signal, synchronizes the display content of the whole display, improves the consistency of the display, and the whole display screen does not have any color difference color block.