【 Weak current College 】 LCD mosaic facade technology application in closed-circuit system

With the liquid crystal display technology, embedded hardware concatenation technology, multi-screen image processing, signal switching technology, such as TV Muqiangxiang gateway technology, the new mosaic wall in the engineering application of Terminal big-screen display devices have rapidly spread, especially embedded Crystal mosaic walls, although the market for a short time, but was widely welcomed. Liquid crystal mosaic wall as a safe city center, railway, port and Terminal monitoring system, intelligent traffic management monitoring center, defense or military monitoring system, power monitoring system, large industrial monitoring and control system, financial management and monitoring system, television or large Studio Center monitor the curtain wall and large venues background curtain wall, video conferencing, and other information gathering and processing of critical display device, with the various types of computer analog/digital signal, composite video signal, such as color difference signals in the large screen display and signal transitions, overlays, combinations, etc.

Liquid crystal (LCD) mosaic wall is different from the rear projection (DLP) video walls, plasma (PDP) TV wall of high-tech splicing wall, this article described the technical superiority, and through specific implementation cases.

1. mosaic wall overview

We all know, the current in the field of splicing large screen display manufacturers and various techniques, blooming, the leading position, but in the final analysis, can be divided into three key technology, the LCD mosaic wall with the most development advantage.

1, rear-projection mosaic wall

DLP technology principle is very simple, in rear-projection units internal settings of a projector, issued by the lens of the image is enlarged by lens reflex into screen on the back is the rear projection. DLP mosaic wall itself are, various technical terms abound, but concluded, its outstanding features are the unit size is big, the technology is relatively mature, mosaicking smaller; its main drawback bulky, life is short, the image quality is not high.

2, plasma screen wall

PDP plasma as the home is used to display dynamic image, as in the use of early high brightness, high contrast, high color gamut, wide viewing angle, and other characteristics are a lot of users of praise, but applied to a security area or take a long time to display static images or text, for example to monitor or splicing into TV wall, the existence of serious deficiencies: display static images is easy, even burning screen blur appears so-called plasma burn-in, the faster the brightness falloff, once imprinted or brightness decrease after unrecoverable; less reliable, power consumption in comparison with other technologies on the high side. Currently, there are specific to the concatenation of the listing, 42 "screen (the border spacing around 5mm), but expensive. In the modern technological level, the shortcomings of the PDP cannot overcome a serious obstacle to its large screen display in the commercial market.

3, liquid crystal mosaic wall

LCD is today's most advanced, most ideal display device, its superior performance, has received widespread recognition. Liquid crystal mosaic curtain wall using the LCD as an add-on unit, overcome the DLP and the disadvantages of PDP curtain wall, offers an excellent performance, using flexible mosaic facade.
Of course, since the LCD backlight glow products still used cathode vacuum tube (CCFL), its both ends of the filament lamp tube and pipe, block limits the size of the LCD Panel, now the tailor screen DID LCD border still 11mm width, so the seam is slightly larger LCD mosaic wall weakness, but with LED backlight technology, this shortcoming will be significantly enhanced.

Liquid crystal mosaic facade technology advantage
LCD products relative to DLP products, PDP product in use, technical parameters, is a well known fact that do not have to say. Here I focus on the big screen mosaic field has two major advantages.

1. size dimensions, use the more flexible

LCD size of various sizes, at random. LCD mosaic facade, in addition to the number of arbitrary choices splicing [line (m) x column (n)], the screen size will also have a variety of options, and can be mixed mosaic, which meet the needs of different places.

We know that mosaic wall in addition to achieving exactly rejecting and large-screen display, but also to achieve multiple small-screen display. For example, a traffic monitoring center of mosaic wall, more often required while watching all the monitoring point of the screen, when a control point to an exception, you can quickly zoom to full screen for monitoring center all at the same time. This requires in practical application, mosaic wall in the big picture and small screen should achieve good display effect.

DLP rear projection and PDP plasma splicing curtain wall, the unit size larger, up to 100 inch or even 150 inch, which is when the big screen displayed a certain program reduced Splice, but its resolution is low, if you use screen divider, display multiple pictures, the effect is not ideal, but the addition of a device, the system costs and stability have led to great effect. The result is DLP mosaic walls can only be used to display a large screen, and a multitude of monitoring points in small screens or LCD monitor or other monitor for display, the signal switching frequency, results are not satisfactory.

Liquid crystal mosaic facade, no such problem. We know the liquid crystal display unit size is relatively small, but the resolution is the highest, and can size dimensions hybrid concatenation, which is conducive to the needs of the user according to the actual use, reasonable arrangement of the concatenation of the programme, to achieve the size and all the desirable effect.

2, stable life long, very low maintenance costs

Relative to the PDP, DLP and LCD's life is very long, and the power is low, not high calorific value, the failure rate is very low. PDP plasma plasma burn-easy to produce, their dynamic display life may up to tens of hours, but in the digitalShows high brightness static image, it is possible in 5 hours after the burn screen will appear; the DLP lamp life is only 3000-5000 hours, therefore, we recommend that you take 24 hours of continuous use of security monitoring splicing wall of choice, you should try to choose LCD mosaic walls to improve efficiency, reduce costs and maintenance costs.