With the development of liquid crystal display technology, embedded hardware-splicing techniques, multi-screen image processing, signal switching technology video wall related technology, the new mosaic wall equipment rapid spread in the end the big screen display engineering applications, especially embedded LCD mosaic wall, although the market is not long, but it has been widely welcomed. LCD mosaic wall as a safe city command center, Railway (MTR), ports, terminals surveillance systems, intelligent traffic management control center, defense or military surveillance systems, power control and supervision system, large factories, mines monitoring systems, financial management and monitoring systems, television or large Studio Center monitor walls, large venues background walls, video conferencing and other information collection, processing key display device having various types of computer analog / digital signals, a composite video signal, the color difference signals on the big screen, and to achieve signal switching, stacking and combination of functions. Liquid crystal (LCD) projection mosaic wall is different from (DLP) TV wall, high-tech mosaic wall plasma (PDP) TV wall, the paper describes the specific technical advantages of its implementation, and are illustrated by specific examples. I. Overview of mosaic wall is known, is currently in the field of large-screen display splicing manufacturers and a variety of technologies can be described as flourishing, but in the final analysis, can be divided into three major technique in which liquid crystal mosaic wall again most development advantage. 1, the principle of rear projection mosaic wall DLP technology is very simple, set a projector inside rear projection unit, issued after the image projected onto the back of the screen zoom lens by lens reflex, that projection. DLP mosaic wall itself classification of many, various terms after another, but summed up, its prominent feature is the large unit size, technology is relatively mature, the seam is small; its main drawback bulky, short life, the picture quality is not high . 2, plasma walls PDP plasma display as the home for the motion picture, due to the early use of high brightness, high contrast, high color gamut, wide viewing angle and other characteristics by many users, but applied to the field of security, or need long When the time display still images or graphics, for example, to make a monitor or a TV mosaic wall, there is a serious flaw: display a static image blur even prone to burn-in, the so-called plasma brand, brightness decay rapidly, Once after the mark or brightness down unrecoverable; low reliability, power consumption is high compared to other technologies. 42 "screen market, (which borders interval of about 5mm), but the price is more expensive. In the current technical level, PDP can not overcome the disadvantages of a serious impediment to its commercial large-screen display applications Currently, there specifically for splicing markets 3, liquid crystal mosaic wall LCD is the most high-end, the best display device, and its excellent performance has been widely recognized. LCD mosaic wall using the LCD screen as the stitching unit, to overcome the disadvantages of DLP and PDP walls, providing a high performance, flexible mosaic wall. Of course, due to the current backlight LCD products luminous still use cathode tubes (CCFL), filament and across the lamp socket which limits the size of the liquid crystal panel, currently used to fight screen The DID LCD screen still frame of 11mm width, so the seam is slightly larger than the disadvantage of the liquid crystal mosaic wall, but with inputs LED backlight technology, this defect will be significantly improved. Second, liquid crystal mosaic wall The advantages of LCD technology products relative to DLP products, PDP products in effect, the advantages of technical parameters, is well-known fact, do not say. Now I focus on to talk about two major advantages in the field of large-screen display has 1, sizes portfolio, more flexible LCD various size range, the size of random .LCD mosaic wall, in addition to the number of arbitrary choice splicing [line (m) × column (n)], the screen also has a wide selection of sizes and can be mixed stitching, which meet the needs of different places, and we know that, in addition to bring the whole mosaic wall screen large screen display, but also to achieve multiple small screen. For example mosaic wall, a traffic control center, the more time requirements simultaneous viewing of all control points of the screen, when a monitoring point appears abnormal situation, you can quickly zoom to full screen for the monitoring center all at the same view. This requires practice, mosaic wall in the big screen and the small screen should all be achieve a good display. DLP rear projection and PDP plasma splicing wall, the cell size large size, some up to 100 inches or 150 inches, which is certainly the big picture when displaying certain procedures to reduce the seam, but because of its lower resolution, if Quad, achieve multi-screen display purposes, the effect is far from ideal, but due to increased equipment costs and the stability of the system have caused a great impact. As a result, DLP mosaic wall for display only a big screen, while the number of monitoring points still need to use a small screen LCD monitor or other display monitors, signal switching frequency, the effect is far from ideal. LCD mosaic wall, there are no such problems We know relatively liquid crystal display unit, the size is relatively small, but the resolution is the highest, and sizes can be mixed mosaic, which is conducive to the user according to the actual needs and reasonable arrangements for stitching program, to the size of the fit, each obtaining optimum results.