Weak current College】 【projector pros and cons of four lifting way --- Power By】 【China power house network.

<br> If you view the projector's performance parameters, we can find, there are ways to install generally vote, rear projection, four diaotou, desktop. This can easily lead to the wrong impression that this is the way of classifying projector projection. However ., this classification is not science, there is a lot of misleading. We can't because a machine is being cast, it would not be rear-projection and diaotou, on the contrary, most projectors that supports at least two projection - this is .what the author believes this classification methods are not the cause of science. <br> <br> Correct perspective should be: is cast, rear projection, diaotou, desktop is a projector can support four types of projection mode, four persons 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, diaotou and desktop mapping. <br> <br> In addition, the recent trouble of seething side .cast is a projection method, then the side cast and what? four projection mode what features? suitable occasion use? author here on the above several projection analysis conducted on an individual basis. <br> <br> Positive vote method <br> < .br> 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. <br> <br> Advantages <br> <br> 1. space saving <br> <br> Consumers are buying a projector, largely owing to the projector can be in a smaller .space, projection of a larger screen. But to get the maximum projection area, in addition to using the wide angle lens, a most important way is possible to increase the projection distance. Because of the audience and the projector at the same side, so .the ideal situation is equal to or greater than the offset of the shadow from the audiences in distance, so you can maximize the increase the projection area. From another perspective, it is necessary to achieve the same projection area, just cast is better than rear .projection space saving. <br> <br> 2. low requirements on the projection screen <br> <br> Is 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. So just to vote on the projection screen requirements is very low, flexibility and environment adaptable, in other words, the majority of occasions can readily adopt positive vote. <br> .<br> Disadvantages <br> <br> 1. the drop shadow effect poor <br> <br> This "gap" is the rear projection. If the audience viewing environment is teaching, training, conferences, exhibitions, advertising, and a .bright, due to the return-path will be light interference, the image may become fuzzy and even color distortion if the projection screen of reflection deviation is taken into account, then the effect is very difficult to make satisfactory. <br> <br> .2. impact on the environment is beautiful <br> <br> Because of the projector and the audience at the same side, so the appearance of the projector, interface, wiring are revealed. Even if you are using a wireless network connection of the .projector, you can only reduce the associated with the network connection that part of the wiring, most of the basic wiring or unable to save. Whether it be family, classroom, Office, Office or presentations messy wiring are great spectacle. So just throw projector .generally use hoisting to resolve this issue. <br> <br> 3. loud <br> <br> Although the projector in the working environment noise is certain, however the audience and the projector at the same side, proximity apparently makes noise problems .become one of the factors to consider. <br> <br> Summary: the way forward to vote generally applicable to the General Forum, dark environment (for example cinema) using the most appropriate, but if the image quality, it is unable to .meet the needs of high-end users. In addition, Web-like signal cable is also very hard to accept. <br> <br> <br> Rear projection <br> <br> 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. Why do so many projectors have support for rear projection? <br> <br> Advantages .<br> <br> Projection effect does not affect beauty <br> <br> In rear-projection, the audience sees a transmission of light, thereby avoiding because screen reflection of fuzzy phenomena. And projection light is usually propagated in a closed Chamber ., greatly reducing the light interference, the drop shadow effect is an increase of a level. In other words, the only interference just comes from the audience and projection screen. It can be said that the rear projection modes simultaneously combines projector projection area and rear .-projection TV clear advantages. Although there is also a projection type shop line, but all of the lines can be hidden in a dark room, the so-called eye sight is the net, it will not destroy the environment beautiful. In addition, .if the anechoic chamber is embedded in the walls, the whole room looks more impressive. <br> <br> Disadvantages <br> <br> 1. big space <br> <br> As the above mentioned being cast, projection area of .the same size, theoretically, rear-projection needs more than just vote for double-depth distance, on the application of the site has set higher requirements. This is the way hindering rear projection the biggest factor of development. In fact, to work around .this problem is not no way, rear-projection refraction is most commonly used methods, through one or more times, reflection and then projected onto the screen, thereby reducing the depth range, saving space. <br> <br> 2. the projection .area is small <br> <br> Projection size makes the rear-projection mode: be is fubeishoudi vote means massive pressure from otherOn the other hand it has suffered rear-projection TV market of oppression, can be difficult to grow in the slit. .<br> <br> Summary: rear-projection mode is suitable for those with high requirements for quality, as well as applied to luxury, spacious environment. <br> <br> <br> Diaotou <br> <br> Diaotou is .and desk projection (also known as the desktop), regardless of whether the table type diaotou can use positive vote and rear projection. The so-called diaotou refers by installing the hanger, screw bolts, the projector in the ceiling fixed lifting. The table .type is the projector is placed in the room on a horizontal plane, the two main differences between fixed or not. Some people think, desktop-you can easily move, it's not more convenient? but it is not, in General, diaotou installation is .more advantages than disadvantages. <br> <br> Advantages <br> <br> 1. lower cost projector <br> <br> Because you do not need to move the weight of the projector and the dimensions seem irrelevant, also indirectly saving .user investment in portability. In other words, the user selects the use if once you plan, purchase models diaotou when recklessly select certain "big guy" but more affordable projector. Build a huge addition to price compare equal projector, portable models for high thermal .performance, also is much better. 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. <br> <br> 2. easy to adjust the projection angle and position <br> <br> While the projector is equipped with vertical keystone correction function, but correction function is to sacrifice quality for the price, .so can not try to do. So when you install should strive to make the projector lens Center and screen center point at the same level. However using desktop installation projector, center point is always the central point in the screen below, the inevitable to vertical .keystone correction. Another requirement is that the projection of light vertically with projection screen, otherwise the horizontal orientation of the trapezoidal distortion to correct the trapezoid horizontally, this is a high-end machine supports luxury features. So, as long as the lifting of the .projection distance, centre point position calculation, once fixed can avoid future you want frequent shifting and correction. So fixed lifting seemingly inconvenience actually save a great deal. <br> <br> 3. arrange adverse to shop online <br> <br> .Although the hoisting of the projectors is often a distraction, however it's laying cable trunking can be passed either through the Central through the ceiling bracket. And fixed lifting can be civil and manpower is designed, this is the desktop. <br> <br> .Disadvantages <br> <br> 1. the signal attenuation <br> <br> Hoisting 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. <br> <br> 2. routine maintenance inconvenient <br> .<br> Fixed loading of the projector to be removed is very small, unless faulty. So the dust removal, replacement filter, clean the lens and other routine maintenance were generally ignored, this will reduce the life of the projector. In addition, the .replacement of the lamp is a chore. <br> <br> 3. install needed by professionals <br> <br> In order to guarantee the installation of reliable, generally need to be installed by professionals as well as adjust the fixed. And .hoisting the necessary hanger must size, screw bolts also matching, this part of the annex are often let manufacturers monopolized, users only have access to. <br> <br> Summary: diaotou suitable for stationary use projector, is used in the classroom, .the presentation Hall, airports and other occasions as the most appropriate. Of course, if the floor is so high that it is not suitable for hoisting applications, will have to use the desktop. <br> <br> Side cast <br> < .br> Side for the past few years before the rise of the installation, often paired with the desktop. Some had not installed projector demonstration Hall and the position of the projector without reservation, even if temporary barely hanging on a projection screen, projector also thrive .. Vote on this side of handy: projector can do not have to be placed in and the projection screen is on the way, as long as the adjustments to the horizontal keystone correction, you can make the screen back to normal. <br> < .br> Summary: support side cast function projector expensive value, but also the portability, so the application is not widespread. Mainly applicable to some do not have the projection environment where temporary use. <br> <br> In the mainstream model, Sanyo .Z1 is unsupported projection, Panasonic PT-M1S11, Epson EMP-7800, BenQ PB series, rich visual LP240, Toshiba S10, etc are supported as vote / rear projection, desktop / diaotou, Sony, NEC CX70/CX80 LT240K + more support of .side. In fact, the combination of a wide variety of installation methods, and each has pros and cons, what installation mode should be selected depend on the actual site needs. Buy projector, in addition to the main parameters of concern to projectors, whether .or not to support your own desired projection mode must also be considered, we end up with "Heroes useless" means our amnesia. <br>.