【 Weak current College 】 is cast, rear projection, hoisting, and analysis of advantages and disadvantages of the desktop installation

We all know, there are four General projector installation, including: being cast, rear projection, lifting and desktop four, in general it is according to space or is used to choose the appropriate installation method. But very few have been carefully to understand how these four types of installation are exactly what are the advantages and disadvantages.
In fact, four different installation methods, proper perspective should be: is cast, rear projection, diaotou, desktop the four installation are interconnected, that is, if a machine only supports diaotou and rear projection, it means that the machine can operate hoisting mode or desktop for rear projection, and do not support any form of investment, but if a machine does not support diaotou, it means that the machine either rear projection or just vote will not be able to use hoisting way, but only on the desktop. Specifically, the cast and rear projection, projection diaotou and desktop.
Positive vote
Positive vote before the vote, also called, is the most widely used and most projectors support installation. The so-called positive vote, referring to the audience and the projector is relative to the screen at the same side. As for access to such a broad range of application is not without reason. A vote is being very save space (this is the relative case of rear projection), because the screen size is determined by the projector and the distance between the screen to decide, which means that the brightness allows the projector and the greater the distance between the screen, the screen size, which is cast by the audience and the projector is on one side, the distance limit smaller, if space allows you to try to put the projector and the distance between the screen. The other is for installation on the projection screen requirements are relatively low, as are cast is relying on the projection screen to reflect light, so unless the image is demanding, as long as the General projection screen can meet your requirements, or even someone with white walls are also fine.
However there are many positive vote. The first point is being voted the drop shadow effect in terms of relative rear projection is poor, it is relative affected by environmental effects of light, if the projection screen of reflection deviation is taken into account, the effects are very difficult to make satisfactory; the second point is just insufficient investment easier to impact on the environment is beautiful, because the projector and the audience at the same side, so the appearance of the projector, interface, wiring are exposed, some a letdown.
Rear projection
In addition to the traditional rear-projection TV with rear projection, now more and more projector also supported installation methods. The so-called projection, referring to the audience and projector separation screen on both sides. The advantage of this Setup is that it affected by ambient light of smaller, because the audience sees a transmission of light, thereby avoiding because screen reflection of fuzzy phenomena. Because the rear projection all lines can be hidden in a dark room, the so-called eye sight is the net, it will not destroy the environment beautiful.
While the choice of rear-projection is the need to have enough space, the projection of the same size screen size, theoretically rear projection needs more than just vote for double-depth distance, on the application of the venue place high demands, this also is a lot of small and medium-sized enterprises meet.
Hoisting
The so-called hoisting refers, by installing the hanger bolt with screws and other hoisting the projector fixed on the ceiling. Lifting is the most common use of the user installation, and the lifting of the benefits is that it is not on the weight of the projector, that is, the user selects the use if once the scheme, when purchasing models diaotou to unscrupulously select some of the more affordable projector, and build a huge addition to the price comparison projector par portable models to high, the cooling performance is relative. Also, fixed makes the projector from the pain of the "bumpy," and in particular on the working time, the projector's shock lead directly to a filament, which is tantamount to suicide. Extend lamp life is reducing the cost of a projector.

Projector installation
Additionally in hoisting should note that when you install should strive to make the projector lens Center and screen center point at the same level. Another requirement is that the projection of light vertically with projection screen, otherwise it will appear horizontally in trapezoidal distortion. And in lifting must bring projection distance and position of the center point is clear, upon calculation of fixed can avoid future you want frequent shifting and correction. So fixed lifting seemingly inconvenience actually save a great deal.
Select the user for hoisting way is important to note that signal attenuation as lifting of projector is usually signal source distance between, and taking into account the convoluted shop line, then the signal cable is greater than 15 metres is very common, but more than this distance signal transmission result input signal attenuation of projector, projection of images occur fuzzy trailing even judder. To do this, you must install the signal source signal amplifier. In addition select hoisting in maintenance there are inconvenient, because the projector fixed ready, no special circumstances is not easily removed, unless there is a failure, the usual dust, filter cleaning and routine maintenance such as cleaning the lens can easily be overlooked, the projection is very negative.
Desktop projection
In fact both diaotou or you can use desktop projection is cast and rear projection, desktop projection is to place the projector in the room on a horizontal plane, the difference between it and the installation is fixed or not, mainly because it is cast, rear-projection exist certain similarities, so here is yet more introduced.