With the increasing demand for outdoor advertising in the market, the scale of application of outdoor LED displays has expanded rapidly. In the face of the complicated products on the market, how can industry users buy products that satisfy themselves? Understanding the parameters of the LED display is a prerequisite.
1. Clarity: According to the best viewing distance point, determine the required area of ​​the screen, the definition of "40000 pixels / m2" optimal distance is 5-50 meters; use the most advanced 16-bit data interface to further improve the clarity of the picture degree.
2. Brightness: The brightness of the screen is designed to be above 2500cd/m2, which not only ensures the vivid color and clear image when the indoor full-color LED display is in normal use, but also ensures that the LED display has a lamp attenuation of more than 30%. Enough brightness and vividness of the video image. Refresh rate: Super 5 types of twisted-pair shielded wires are used between the processor and the screen. High-performance control ICs can be configured to design the high refresh rate of the screen at ≧1000HZ to ensure that there is no water ripple and flicker during video playback. Low total digital loss and immunity to electromagnetic interference. Power supply and signal transmission: Because of the importance of the full-color LED display, the power supply and signal transmission must be technically treated with high-quality military-grade connectors. Further faults caused by various pull-up forces are controlled at the connector.
3. Control mode: Select the self-designed control system and conduct 240-hour uninterrupted power-on aging screening to select a highly reliable control system. Moreover, the dual redundant hot backup is adopted in the control mode, and once the problem occurs, it is immediately connected by another signal line, continues to work normally, and smoothly connects.
4. Raw materials: All the raw materials of LED display are brand-name high-quality products. The most important LED lamps use high-quality LED lamps.
5. Three-stage product aging process: Firstly, the module produced by the automated assembly line is energized and aging for 24 hours, then 48 hours of electricity aging is performed on a single box. Finally, the on-site assembled finished display screen is energized and aging for 72 hours, and passed the test.
6. Product quality control: All products are manufactured in strict accordance with ISO9001-2000 quality certification system documents. (See quality certification), will be strictly in accordance with the waterproof rating IP65 test, to achieve complete waterproof effect. Installation and commissioning of LED display: The LED display is installed and debugged strictly according to the design scheme, and the installation level is above C level (the highest level of LED display installation).
7. Leading system software (prepared for screen re-application): The operating system adopts Windows XP and supports the latest products of Windows series provided by Microsoft. All applications are based on Windows and are user-friendly. The playback software has a rich clock function, which can display the current date, the current time, and the display clock synchronized with the time of the computer can be an analog clock or a digital clock. The software uses advanced threading technology to play text, animation, clock, photos, audio, etc. in multiple threads while playing the software.
8. Perfect system function design (prepared for screen re-application): This system can meet the requirements of assembly, performance, TV broadcast and advertising broadcast. The LED display system of this project has multimedia, multi-channel, real-time transmission of high-speed communication data and video interface, which can conveniently introduce various forms of information sources into the computer network system to realize unified control of various audio and video inputs.
9. Video playback function can display true color dynamic video images: high-fidelity broadcast CCTV, satellite TV programs; a variety of video signal input and output interfaces: composite video, Y / C video (S_Video), YpbPr, VGA (RGBHV), DVI, HDMI, SDI (HDSDI); can play high-fidelity video recorders, DVD players (VCD, DVD, LD) and other video programs; with text, animation and still pictures on the video screen; through the editing device can be achieved Real-time editing and playback features such as panoramas, close-ups, slow motion and stunts. Brightness, contrast, saturation, chroma can be adjusted by software, the adjustment range is 256 levels; with image freeze function; with video overlay (VGA + Video), video (Video), VGA three display modes; with horizontal / vertical Position compensation function; with display synchronization.
10. Computer graphic information playback function can display various computer information, text, graphics, pictures and 2, 3D animation, etc.: It has rich playback mode, displaying scrolling information, notification, slogan slogan, etc., and has large capacity for storing data information. The display body can open multiple windows, display calendar, clock, and insert a single line of flowing text. There are a variety of Chinese fonts and fonts to choose from, as well as English, Spanish, French, German, Greek, Japanese, Latin and Russian. The broadcast system has multimedia software that allows flexible input and broadcast of a variety of information. There are more than 20 kinds of broadcast methods: left and right scrolling, scrolling up and down, pushing left and right, pushing up and down, diagonal pushing, spreading, fan type, rotation, zooming, etc. Display network data information through a network connection. Equipped with a network interface, it can be connected to a computer, share network resources, and has a standard audio signal output interface to achieve audio and video synchronization.
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