With the domestic investment in energy, transportation and other basic industrial construction and the continuous advancement of industrial automation and informatization, the demand for large-screen splicing industrial applications has steadily increased, and the construction of large-scale monitoring, command and dispatching large-screen splicing projects has become more and more frequent. Among them, the most "heat transfer" is probably the number of LCD splicing-LCD splicing wall has been widely welcomed in domestic and foreign markets for its excellent performance and reasonable price.
In recent years, LCD video walls have achieved rapid market growth for several consecutive years. In terms of technology, the seams continue to break through the limit, from the early 6.7mm, 6.0mm to the narrowest today's 3.5mm, 1.8mm, or even the smallest; in terms of size specifications, the ultra-narrow LCD splicing screen has also achieved from 37-60 Various sizes of inches. In terms of display technology, the application of LED backlight technology has greatly improved the display effect of LCD splicing screen in terms of color and brightness. " and other new technology applications emerge in an endless stream; in terms of application scope, it has expanded from relatively professional and high-end applications to now cover business, entertainment, public management and other subdivision applications.
LCD splicing has become one of the most promising sunrise industries at present, and there is still a lot of room for growth in the future, especially in the following aspects.
HD kỹ thuật số
With the development of technology, people's demand for digital high-definition display is getting stronger and stronger, and the traditional composite video interface and VGA interface obviously cannot meet such requirements.
At present, there are many interfaces that can realize digital high-definition display, such as HDMI interface for TV and the new DiiVA interface, but these interfaces based on digital TV are not suitable for the use of security monitoring, for example, there are problems such as interface incompatibility and short transmission distance. .
The digital high-definition LCD video wall must have high-definition video surveillance with HDTV video quality. Therefore, adopting the appropriate interface compatible with the existing system is the key to realizing digital high-definition. The broadcast monitor adopts HD-SDI interface, which fully meets the development requirements of digital high-definition, and has the advantages of long transmission distance, compatible interface, standard can be based on, plug and play, etc. It is an important part of LCD video wall to realize digital high-definition direction.
Chắp vá vi mô
It is a major defect that the LCD splicing wall cannot achieve complete seamless splicing. In terms of technical indicators such as color reproduction, clarity, and service life, the LCD splicing wall has all the advantages, and these advantages completely come from the display principle of the LCD itself. . It is also surpassed by other display devices overnight. Therefore, the only remaining problem is the splicing gap. The current LCD splicing products have already made small seams, and there are many products on the market that can make 1.8mm or even smaller seams, but they are limited by cost and micro seams. The product still needs to be further promoted, and once popularized, it will greatly promote the development of LCD video wall.
In recent years, projects such as Safe City and Smart City have been launched, driving the rapid development of the security industry, and security applications are inseparable from the support of large-screen display monitoring equipment. However, the monitoring center often assumes a very important security responsibility, so the image integrity of the monitoring large screen is very high, especially when the route and other graphics need to be displayed, the patchwork of the LCD splicing may interfere with the picture, and Micro-seam products are much better.
In addition, in some high-end fields, such as the radio and television industry, due to the pursuit of picture effects, in the selection of studio background screens, DLP and small-pitch LEDs are now more favored. If LCD splicing enters the era of micro-splicing, micro-splicing can improve the image under the recording screen, paving the way for the application of LCD splicing in the studio-based broadcasting field.
It can be said that the smaller the stitching product, the LCD splicing can take off the hat of the low-end market and enter the whole industry of large-screen display. In addition to the two very representative industries of security and broadcasting, the application prospects of micro-seam LCD splicing in virtual simulation, exhibition display, information release and other fields are also promising.
Đa dạng hóa các phương pháp kiểm soát
The current LCD video wall control method is relatively simple, nothing more than using a controller or a PC computer to control it through a serial port, which obviously cannot meet the needs of multiple control methods in different use cases.
As far as control is concerned, the possible development direction includes the use of network linkage. For example, as long as there is corresponding authority, in any place that can connect to the Internet, control commands can be sent to the LCD video wall through Ethernet and control software. . For example, by using a remote control device, the LCD video wall is equipped with a dedicated remote control device, and the LCD video wall can be controlled without connecting to a computer.
Thông minh
The functions of the LCD video wall embedded system are becoming more and more powerful, and more intelligent designs will be incorporated in the future to make the system operation more convenient and fast.
First of all, of course, intelligence is system debugging. The LCD splicing wall is formed by splicing multiple LCD splicing units. Due to the differences between the units, it is very important to ensure the consistent display of unit color and geometry. The traditional method is to slowly adjust and correct the LCD video wall through equipment and visual inspection. The intelligent design method is to automatically adjust with one key through the system function, and easily complete the original complex adjustment process.
The second is intelligent monitoring. The advantage of the LCD video wall is to display a large screen, such as a high-resolution map and the corresponding scene. When the target is locked, the camera can be automatically switched with the movement of the target, and the target is always locked in the predetermined display area of the large screen. At the same time, it has the function of short-time video recording and snapshot image. Of course, LCD video walls cannot and cannot record all videos, but in special cases, intelligent short-term video recording and image capture are of great significance.
Of course, there are many functions of intelligent design, such as face video and capture, cross-line recognition and capture, and so on.
Tích hợp thiết bị
As a dedicated large-screen display device, the installation and debugging of the LCD video wall is an important issue. Compared with other bulky display devices such as DLP, lightness and thinness are an important advantage of him. However, in order to realize the function of the system, it is often necessary to equip other devices, such as a matrix, a distributor, a connecting line, and so on. With the development of technology, the installation structure will become simpler and simpler, all equipment will be integrated in each unit, and the unit will be modularized, which will make installation and debugging easier and easier, and finally realize the integration of equipment.
mạng
The networking of video surveillance is a problem that any company and any product cannot ignore. Networked products have many advantages, such as long-distance transmission, mature network transmission technology, relatively high definition, and can achieve megapixels, etc., but there are also technical defects, including packet loss and compression delay. In fact, most of the current security monitoring systems use network transmission, but in front of the back-end LCD splicing wall, a device such as a digital matrix is used to restore the video transmitted from these networks to video signals again, and then display to the LCD splicing wall.
From the perspective of short-term technological development, the network signal is directly connected to the LCD video wall, minus the network digital signal and then converted into an analog signal. From a longer-term perspective, it must be from the front-end camera equipment to the back-end display equipment, all digital and networked, completely replacing analog signals from the system.
