Yunnan liquid crystal mosaic factory, 42-inch LCD stitching project Dali, Lijiang ,, LCD splicing is to use the principle supplier of LCD liquid crystal under the effect of the onset voltage deflection. Constituted by a liquid crystal screen can be visualized at the same point on the red, green, and blue color, or a point of the liquid crystal is determined by stacking up three points, which are arranged in accordance with a certain order, through the voltage to the impact of these liquid crystals, you can not exhibit the same color, not the same share of the ever-changing mix of colors can be rendered. The liquid crystal itself does not emit light, it emits light by the backlight tube, thus depends on the LCD backlight tube. Because LCD chosen point imaging reasons, so the more points screen inside constituted the role of the more sophisticated imaging aspect points constitute LCD TV resolution, the higher the resolution, the better the effect. Huakai Rui outer stitching 42-inch LCD screen and can be dragged splicing controller called large-screen display, a video wall controller or TV wall splicer, its main function is to complete the picture after a red signal into N blocks are allocated to N a video presentation unit (e.g., rear projection unit), complete with a large screen to form a plurality of normal video units. It can support a variety of video equipment at the same access to reach the demand function of mosaic wall. It is called outside the trailer, because this type of mosaic wall is divided into two separate some, some one show some, this may be as rear projection TV consists of an ordinary cell; the other is this some splicing control device, its function is to complete a plurality of physical outputs combined into an output resolution appear superimposed, so that the screen appears an image. Followed by the more prosperous large screen LCD stitching along the mall from the race will be more encouragement. In this mall continued to add, cake bigger and bigger at the same time to enter this profession is constantly add related companies. During this period, not only the traditional stitching large screen companies, some of the traditional TV show makers are now entering into this profession to be able to win a cake waiting. To add the machine itself standby time and enhanced liquid crystal show a drive to, LCD manufacturers have developed to meet the low voltage and low frequency conditions, low threshold voltage of the liquid crystal. It has the following features: time low threshold voltage of liquid crystal monomer with polar groups in the monomer without polar groups presents homosexual representation isomer chromatography conditions under standing shorter. More monomer component with a polar group, also means that the LCD easier to contact other free ions and water molecules with polar, then reduce the liquid crystal capacitance resistance, which then leads to increased leakage current and power consumption great. When the molecular chain polar liquid crystal monomer after UV intensified polar molecular groups constituting simple neutral molecules around each other, to become a non-smectic fault condition, thus forming the threshold voltage increases, the anchor of the guide layer the role of insensitive, low-voltage drive to lose. TN liquid crystal molecular chains are generally shorter, characteristic parameter adjustment more difficult, so the difference is more obvious characteristics. STN LCD STN display by the data model to calculate the length of the liquid crystal molecules, electrical and optical properties of the required parameters, and chemical synthesis of a variety of molecular chains of monomers having different structures similar polar molecular groups, the deployment of each other to form a characteristics similar series of LCD. Different series of the STN liquid crystal tends to have a completely different molecular chain, therefore, different series of the STN liquid crystal can be deployed unless the manufacturer's instructions with each other, but not mutually deployment.