Analysis of 10 Major Technical Parameters of Outdoor LED Display
With the continuous improvement of outdoor advertising demand, the application scale of outdoor LED display is expanding rapidly. Faced with the complex brand products on the market, how can industry users choose products that satisfy themselves? Understanding the parameters of LED display is the first prerequisite.
1. Definition: According to the best viewing distance, the screen area and the best distance of "40000 pixels/m2" are determined to be 5-50m. The most advanced 16-bit data interface is adopted to further improve the definition of the screen.
2. Brightness: The screen brightness design is more than 2500cd/m2, not only can ensure that the indoor full-color LED display screen in normal use color vivid, clear image, but also can ensure that the LED display in the light tube attenuation of more than 30% with sufficient brightness and vivid video image. Refresh rate: the processor and the screen between the use of more than five types of twisted-pair shielded wire, configuration of high-performance control IC, the high refresh rate of the screen can be designed at more than 1000HZ, to ensure that there is no video playback ripple and flicker, low digital loss, anti-electromagnetic interference. Power supply and signal transmission mode: Because of the importance of full-color LED display, power supply and signal transmission must be technically special processing, using high-quality military grade connector design. Further control of various pull up failures at the connector.
3. Control mode: Select the self-designed control system, and conduct 240 hours of uninterrupted power aging screening, and then select a highly reliable control system. And in the control mode, dual redundant waste heat backup is adopted, once the problem occurs, another signal line will be connected immediately, and continue to work normally, smooth connection.
4. Raw materials: All the raw materials of LED display screen are brand-name and high-quality products, and the most important LED lamp is high-quality LED lamp.
5. Three-stage product aging process: first of all, the automatic assembly line production module 24 hours on-line aging, and then a single box for 48 hours on-line aging, and finally simulated on-site assembly of finished display for 72 consecutive hours on-line aging, qualified after the assembly can arrive at the site.
6. Product quality control: All products are manufactured in strict accordance with ISO 9001-2000 quality certification system documents. (see the quality certification certificate), will be strictly tested in accordance with the waterproof grade IP65, to achieve full waterproof effect. LED display installation and debugging: strictly according to the design of LED display installation and debugging, installation level reached C level or above (the highest level of LED display installation).
7. Leading System Software (for screen reuse): The operating system uses Windows XP and supports the latest Windows products offered by Microsoft. All applications are based on Windows and have friendly interface. Play software has rich clock function, it can display the current date, current time, and computer time synchronization display clock can be analog clock, can also be digital clock. The software adopts advanced thread technology, which can play text, animation, clock, photo, audio and so on.
8. Perfect system function design (for screen re-application): The system can meet the requirements of assembly, performance, television broadcast and advertising broadcast. The LED display system of this project has multi-media, multi-channel, real-time transmission of high-speed communication data and video interface, can easily introduce various forms of information sources into the computer network system, to achieve a unified control of various audio and video input. The detailed functions are as follows:
9. Video playback function can display true color dynamic video images; can broadcast closed-circuit television, satellite television programs with high fidelity; a variety of video signal input and output interfaces: composite video, Y/C video (S_Video), YpbPr, VGA (RGBHV), DVI, HDMI,, SDI (HDSDI); can be high fidelity video player, DVD (VCD, DVD, LD) Video programs, such as video programs; with the video screen superimposed text, animation and static pictures and other functions; through the editing equipment can achieve panorama, close-up, slow shot and special effects and other real-time editing and playback functions. Brightness, contrast, saturation and chromaticity can be adjusted by software, and the range is 256. It has image freezing function, video overlay (VGA + Video), video (Video), VGA display mode, horizontal / vertical position compensation function and display synchronization function.
10. Computer graphics and text information playback function can display a variety of computer information, text, graphics, drawings and two, three-dimensional animation, etc. Rich playback mode, display rolling information, notifications, slogans, etc., storage data information capacity. The display body can set up multiple windows, display calendars, clocks, and insert single line mobile texts. There are a variety of Chinese fonts and fonts to choose from, but also can be input in English, Spanish, French, German, Greek, Japanese, Latin and Russian and many other foreign languages. The broadcasting system has multimedia software, which can flexibly input and broadcast various kinds of information. There are more than 20 broadcasting modes, such as left and right rolling, up and down rolling, left and right pushing, up and down pushing, diagonal pushing, diffusion, fan, rotation, scaling and so on. Through network connection, display network data information. Equipped with network interface, can connect with computer network, share network resources, with standard audio signal output interface to achieve audio-visual synchronization.
