LED display (LED display) is a flat panel display, composed of small LED module panels, used to display text, images, video, video signals and other information equipment. The components are as follows:
1. LED unit board: It is one of the core components of LED display. The quality of the unit board directly affects the display effect of the display. The unit board is composed of an LED module, a driver chip and a PCB circuit board. The LED module is actually made up of a lot of LED light-emitting points with resin or plastic packaging dot matrix.
2. Connection: It can be divided into data line, transmission line and power line. The data cable is used to connect the control card and the LED unit board. The transmission line is used to connect the control card and the computer. The power cord is used to connect the power supply and the control card and the LED unit board, and the copper core diameter of the power cord connecting the unit board is not less than 1mm.
3. Power supply: The power supply generally uses a switching power supply with 220V input and 5V DC output. It should be pointed out that since the LED display screen is a precision electronic device, a switching power supply must be used instead of a transformer.
4. Control card: We recommend the use of a low-cost strip-screen control card, which can control a 1/16-scan 256x16 dual-color screen, and can assemble the most cost-effective LED screen. The control card is an asynchronous card, that is, the card can save information after power off, and can display the information stored in it without connecting to a PC.
Small pitch led display
Performance characteristics:
(1) High-intensity light, sunlight refracted, can display the screen surface content in high-definition in the visible range.
(2) The gray control level is high. It can use 1024 to 4096 gray scale control to display colors above 16.7M clearly and vividly, ensuring a super three-dimensional image.
(3) The driving power is large, and the scanning method is mainly static latching to ensure high-intensity bright light.
(4) In order to ensure the best playback effect, the light can be reasonably controlled through the automatic adjustment function under different background environments.
(5) Circuit integration mainly uses large-scale imported devices to improve the reliability of operation and facilitate maintenance and debugging.
(6) Utilize modern digital processing technology to process video, and mainly choose the technology distribution method for scanning. The design presents modularity, adopts static constant current drive, and automatically adjusts the brightness, thereby achieving high fidelity of the picture, no ghosting, and improving the image. The clarity of the picture. [4]
(7) Information display types are rich, such as icons, videos, text, animation, pictures, etc., and there are various forms of reality, such as networking, remote reality, etc., and the combination of common colors and craftsmanship.
Small pitch led display
Application advantages:
(1) Equipped with a full-color display, the introduction of more high-quality imported LED dies, so that the screen has high-definition imaging, uniform color, low power consumption, light screen body, thin screen layer, and wide-area viewing angle, so it fails The probability is small, easy to maintain and maintain.
(2) It mainly adopts the PCTV card, a multimedia display card that integrates multiple functions, with better performance, more advanced acquisition methods, accurate video capture, and Studio editing software that matches the display card.
(3) DVI interface technology is relatively advanced. Without the help of A/D and D/A conversion, the integrity of the picture image is guaranteed, the possibility of details is reduced, and the computer image is completely reproduced on the display screen. DVI can support all display modes to ensure the stability and reliability of data display while having multiple integrated functions.
(4) Use the indoor full-color system to alleviate the hidden dangers of system display and transmission of large amounts of complex data, and fully perform full-true color restoration. Use the chip to complete data distribution and display tasks, perform pulse output conversion on received data, convert 8-bit (8bit) display data to 12-bit PWM, upgrade to 4096 (12bit) gray scale control, and realize non-linear 256-level vision on screen display Grayscale, fully creating a true color visual enjoyment.
(5) The drive mode adopts a constant current system. Through its high cost performance, the lack of discreteness of the pressure drop of the LED tube is improved, the mosaic problem is overcome, and the picture quality is guaranteed.
(6) Combine the mode of optical fiber transmission to reduce signal loss during transmission.
