LED display control system, also known as an 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, and generating the serial display data and scan control timing that the LED display can recognize according to the partition drive mode.

cartop screen control card

Control system classification

Asynchronous control system:

LED display asynchronous control system is also known as LED display offline control system or offline card. Mainly used to display a variety of text, symbols, and graphics or animation-based. The screen display information is edited by the computer, pre-positioned into the frame memory of the LED display by RS232/485 serial port, and then display the playback screen by screen, cyclic, display color, and varied. Its main features are simple operation, low price, and wide range of use. led display simple asynchronous control system can only display digital clock, text, and special characters. led display graphic asynchronous control system In addition to the functions of the simple control system, the most important feature is that it can be divided into regions to control the display screen content. Support analog clock display, countdown, picture, table, and animation display. With functions such as timer on/off, temperature control, humidity control, etc.

Synchronous control system:

LED display synchronous control system, mainly used for real-time display of video, graphics, notifications, etc. Mainly used for indoor or outdoor full-color large screen display. LED display synchronization control system control LED display works in a way basically equivalent to the computer monitor, it is updated at least 60 frames / second rate point by point corresponding to the real-time mapping of images on the computer monitor, usually with multi-grayscale color display capabilities, can achieve the effect of multimedia publicity and advertising. Its main features are real-time, expressive, more complex operation, and high price. A set of LED display synchronization control systems generally consists of sending cards, receiving cards, and a DVI graphics card.

android playbox

Control card classification

There are many kinds of control cards on the display, and there are also many companies producing control cards, such as Moshier, Lingxing Yu, Zhongqing, Yangbang, Atco, Jinhan, and so on. Simply put, they are divided into full-color synchronous cards, asynchronous offline cards, and full-color video offline cards.

With the rapid development of LED displays in the past 2 years, the market of LED control cards has become more extensive, especially the new U disk LED control card just started in 2009 is currently the most used, available serial port to connect to the computer, also available U disk to pass information, save computer, free wiring, support analog clock, flowing border, U disk LED control card can save computer, save wiring.

C-type card

(Partition card) (U disk and serial port dual communication function)

• Support 4 sweeps, 8 sweeps, and 16 sweeps of a variety of indoor, outdoor, semi-outdoor single and double-color display boards, a card multifunctional arbitrary settings.
• Support running border and analog clock function, more prominent display content.
• The maximum controllable range of single-color is 114688 points, two-color points halved, while the built-in four 08 interfaces and four 12 interfaces, can be expanded to 8 interfaces.
• Display functions: support text, pictures, animation, EXCEL tables, time, temperature, countdown (positive) timer, etc.
• Can be used to make door head screens, poster screens, car screens,s and other kinds of various models of the screen.
• Set up the lock screen function, built-in 4 groups of timer switching time, which can be set to use at will.

E type card

(time partition) (U disk and serial port dual communication function)

• Support 4 sweeps, 8 sweeps, 16 sweeps, support a variety of indoor, outdoor, and semi-outdoor single and double-color display boards, and a card multi-capacity arbitrary settings.
• The maximum controllable range of single-color 40960 points, two-color points halved, built-in three 08 interfaces, and three 12 interfaces can be expanded to 8 interfaces.
• Display functions: text, pictures, animation, time, temperature, countdown (positive) timer, etc.
• Can be used to make door head screens, poster screens, car screens, and other kinds of various models of the screen.
• Setting lock screen function, built-in 4 groups of timer switching time, can be set to use at will.
• With the dual function of serial communication and U disk entry information.
• Support a U disk management of multiple display function, convenient multi-screen centralized management.

G-type card

(Serial communication function)

• Ditto supports 4 sweeps, 8 sweeps, and 16 sweeps of various indoor, outdoor, and semi-outdoor single and double-color display boards, a card with multiple functions, and arbitrary settings.
• Support running border and analog clock function, more prominent display content.
• The same as the maximum controllable range of single-color 114688 points, two-color points halved, built-in four 08 interfaces and four 12 interfaces, can be expanded to 8 interfaces.

F-type card

(time partition) (serial communication function)

• Support 4 sweeps, 8 sweeps, 16 sweeps of various indoor, outdoor, semi-outdoor single and two-color display boards, a card multi-capability arbitrary settings.
• The maximum controllable range of single-color 40960 points, two-color points by half, and built-in three 08 interfaces and three 12 interfaces, can be expanded to 8 interfaces.
• Display functions: text, pictures, animation, time, temperature, countdown (positive) timer, etc.
• Can be used to make door head screens, poster screens, car screens,s and other kinds of various models of the screen.
• Setting lock screen function, built-in 4 groups of timer switching time, can be set to use at will.
• With serial communication function.

According to different needs, you can use the serial port to connect to the computer, you can also use the U disk to transmit information. Using a U disk control card can save a computer, save a cloth line, can control 100,000 points, and a cartoon.

Control system way classification

An array control system, LED full-color display control system. “Array” control system consists of a main control board, a number of the deputy control board, and a number of scanning boards installed in the display box, equivalent to a set of the control systems in each box control, the use of this structure to fully improve the reliability of the display and the effect of the display, in the effect of more obvious, a good solution to the High-grade LED display plays video when the frame change frequency is not high, the gray level is not enough, color uniformity is not good and other problems. The expert committee organized by the Science and Technology Bureau identified that the technology has reached the level of domestic leading and international similar products.

The birth of this generation control system has improved the technical advantages of screen control and further improved the processing technology of display signals.

After adopting the “array” control system, first of all, the frame change frequency of the display can be increased from about 60Hz to more than 120Hz, which is much larger than the human eye’s ability to distinguish, so that there is no strobe and water ripple phenomenon when people watch, which improves the quality of the display. Secondly, the gray level of the red, green, and blue colors of the display can be increased from 256 to 1024, making the colors more vivid, better color reproduction, and the displayed image more realistic. Finally, LDVS signal is used for transmission, which maximizes the avoidance of signal loss and synchronizes the display content of the whole display, improving the consistency of the display, and no color difference color block appears in the whole display.