How to choose a projector?

Find a suitable projector is easier than you might suppose. Currently on the market, there are hundreds of models of projectors. Answering only four simple questions, you can find a better option:

1. What level of brightness should have a projector?
2. What he should have permission?
3. Whether any role weight projector?
4. In how much it will cost you?

Brightness

What brighter projector, the more expensive it is. Rule relating to the optimum level of brightness, reads as follows: choose a bright projector, which only can afford.

The parameters that should be brought to account in choosing the level of brightness

By choosing the level of brightness projector, consider the following points:

1. How many people presumably will be in the room, which is the projector?

This factor determines the size of the projected image: it is essential that all those present were clearly visible image. As the number of people in the room, the image should also increase, and if it increases the brightness of the projector markedly reduced, because the light is distributed over a wide area.

2. How badly lit room?

What darkroom, the better the image, regardless of the level of brightness of the projector. However, the majority of assembly means that coverage for the records and direct interpersonal contact. Conditions that do not turn off the light or muting, or if the projected image falling direct sunlight, imply the existence of the projector with high brightness.

3. What type of projection screen is available?

The type of projection screen can greatly affect the brightness and image quality. Most projection screens now provide a significant level of reflection of light, which allows the projector, even with relatively low levels of brightness to project a clear image. If there is no room projection screen that it is legitimate for the mobile trade presentations, in such cases would do well to have a projector with high brightness, as Wall poorly reflects the light.

4. In what used projector?

If you are using the projector as a means of learning for training or for business meetings, in such situations require a higher level of brightness, so that all the details were clearly visible, and that the text would be perceived without eye strain. These situations also imply a greater coverage of space for comfortable recording and communicating. If the projector used to show graphic images or video material, in this case to highlight not produced such high standards and viewing can be done in the dark room. If you are going to move up in a building or take it with them to travel, think about what settings you the most useful.

Arm under video

Manufacturer: SMS (Sweden)
Security and stability. SMS Projector WL F - wall bracket for light projectors. This elegant and safe solution for projectors weighing up to 12 kg. SMS Projector WL F is ideal for situations where it is impossible to consolidate the projector in the inverted position. The projector is set to arm in an upright position.
Color: Aluminum / silver or aluminum / black.
• Maximum load: 12 kg.
• Weight: 4.5 kg
• Length: 400 mm (column).
• Polka: 380x420 mm (or 420x380 mm).
• The cavalry can move along the rod
• Polka 380h420 mm in the kit.

LV-7245

Specifications
Description

Canon produces a new multimedia projector LV-7245, fully meets the requirements of business. The projector provides high-definition images with true permission XGA (1024 x 768 pixels), which, using compression can be increased until the UXGA (1600 x 1200 pixels). High contrast ratio 300:1 ensures lively, bright colors, brighter shades of white and black - black. LV-7245 provides a brightness of 2500 lumen: more than enough for projecting a bright picture even in bright rooms.

The unit has a wide range of functionality that guarantee an unsurpassed level of convenience and quality image. Among them - automatic trapezoidal distortion; amendment to the color of a surface on which the projection is performed; remote control the mouse pointer connected computer and can connect an external monitor to the analog output RGB. Speed off the projector at 60% higher than the previous model, while in silent mode, the noise level is only 30 dB (A).

	High-quality presentations The projector is equipped with a compact lens with a Canon 1.2-fold zumom, which used many advanced design company in the field of optical technology to provide excellent color and clarity of the image. Wide-angle lens allows the projector to locate very close to the surface for projection, which is very convenient for the presentations in small rooms: 100-inch image can be projected from a distance of only 3 meters. High-quality XGA panel can project images with true resolution of 1024 x 768 pixels and using compression with external signal sources can project images with a maximum resolution of UXGA (1600 x 1200 pixels). The brightness of 2500 lumen projector LV-7245 can be used in large conference rooms and meeting rooms. View presentation will not be difficult, even in bright rooms. The projector has a progressive scan, which allows continuous prorisovyvat top-down image that compared with interlacing significantly reduces flicker and increases the accuracy of maps of diagonal lines and text. Also, the projector has a mode of reducing the flickering images, raising the quality of the image, projected from a source that broadcasts a signal with interlacing. Convenience and flexibility in operation Through embedded sensors, seat - for the automatic correction of trapezoidal distortion in the range of / -30 degrees - the projector does not necessarily establish strictly perpendicular to the screen to get the correct picture. In a presentation on the premises not equipped with projection screen, using the amendment to the color of the surface on which you projecting that, depending on the color of the surface optimizes color and provides a natural color image. The function ensures correct projecting an image on the surface of seven colors: green (blackboard), light yellow, light green, light blue, sky blue, light pink and pink. The unit is equipped with complementary exits analog RGB-signal, allowing the projector to connect an additional monitor, which gives Rapporteur to simultaneously see both the audience and presentation. The new remote control provides access to most of the functions of the projector, and using infrared USB-receiver, included in the kit, allows you to control your computer mouse pointer up to 7 meters, which provides Rapporteur of the present freedom of action. The function of mirror display provides a valid projection images even when the projector is installed on the ceiling or on the back side of the projection screen. Ultrafast machines After connecting to a PC or other video source is no need to waste time on setting up the projector - feature adaptation of the projector to computer graphics Auto PC Adjust automatically identify and permission type of input. You do not have to perform complex setup projector - it happens automatically. Time to include the projector is only about 10 seconds, thus avoiding delay in the presentation. Design projector significantly improved and provides better ventilation for more rapid and efficient cooling of internal components of the unit. Cooling the projector takes only 30 seconds, after which it can be packaged for transport. Profitable investment The user can select one of two modes of operation lamp - normal or quiet: better quality and lower noise levels, respectively. In addition to reducing noise when the fan in silent mode reduces power consumption and extended lamp life is almost 1.5 times (up to 3000 hours), which significantly reduces operating costs. If 5 minutes on the projector does not do video or the user has not fulfilled a single operation, the projector lamp is automatically turned off, thus to extend the service life and reduce electric power consumption. The model is easily function Lamp and Filter Hour Meter, which allows you to determine the remaining life of the lamps and air filter. Safety and universal connectivity To prevent unauthorized access can be given a password, without entering that the only available options to disable the projector. This feature will provide a reliable preservation of data. Also, the unit is equipped with protective jack Kensington, which allows assistance rope lock, opened the key cylindrical shape, the projector is attached to a solid fixed object. The projector supports component video projection, high-resolution DVD-signal equipment and high-definition television (HDTV). And with the help of additional purchased SCART-cable can connect a wide range of audio and video equipment. The projector has a simple graphical user interface that supports 21 languages.

Review poroektov

Instead of regular review of projectors offer you a purely practical material, which would allow a little deeper understanding of these technologies. We invited a lot of models and a large number of different technologies. But we - first of all buyers, and market projectors are now under regular transformation. Your humble servant chose the main issues that came to me on the subject in recent times. Many after reading the material might think that projection technology dies. It is, it is that either the demand is part of our "digital home" tomorrow. It is true that the cheaper DLP-projectors are harmful to health? What is a "rainbow effect", and from which it emerges? How much is normal DLP-projector? Why expensive LCD and DLP-model faces the same? At today's market are most popular decisions projectors, an image which is formed of Technology DLP (Digital Light Processing) and LCD (Liquid Crystal Display). In terms of luxury models, the formation of images in both cases is virtually identical - each point is the result of combining the three - red, green and blue - split light beam passes through a matrix or reflected from mikrozerkalnyh chips, then reduced. In the version of LCD is usually used three active matrix TFT-on polycrystalline, through which pass, and then combined luminous flux. As part of the DLP situation is similar - using three DMD-chip (DMD - Digital Micromirror Device), the flow of light reflected or not recognized by mikrozerkal, after which all three images combined. At this point is understood that the three-DMD-chip is used only in very expensive (!) Models, and the technology corresponds to 3 class quality. The models 1 and 2 classes, which are now being distributed as a DLP-budget device used is another shematika - used a DMD-chip and a color filter, which is often called "color wheel", divided into red, blue and green sectors. With its rotating at high speed and with it the work of the chip raises a colorful picture. In this case, particularly our visual perception, its integral properties. When a high-speed rotation "color wheel" people will not notice the change of colors on the screen, or if the talk in simple terms, they would "merge". And actually, if you sfotografiruete image from the DLP-projector conventional camera, you get red, blue or green image. That is why this is not a vision but a vision, as in shaping the image of DLP-projector 1 or 2 classes involved and the brain. The first devices to DLP-DMD-one chip, which is now the cheapest, the speed of "color wheel" is equivalent to 60 revolutions per second, because of the frequency in the U.S. electricity grid. Then there were some reasons for this increase in speed ... The second overseas has been marked 120 revolutions per second, which is double the speed "wheel". Accordingly, an upgrade and DMD-chip, which DLP-projectors next generation went up slightly. And for the first time around DLP-devices oboznachilas or did priotkrylas very wonderful problem, which had been widely written in the specialized press a few years ago. Name the problem - "rainbow effect" that is recognized, but full-scale tests, most likely not carried out. Each uniform dot on the screen is the result of successive outbreaks of color. If while watching a fast wave your hands in front of the eyes, then you will notice the absence of any color, because your fingers while passing before my eyes, obscure from us one of the non-ferrous sector. And, often, the term "rainbow effect" can be found another description, namely the delay or improper imposition of flowers on moving objects in the cut. This is not really true, since even in one-DLP-projectors (60 revolutions per second) for each frame wheel prokruchivaetsya exactly two times, that is One frame is displayed in full as a static image. A motion of objects we perceive only through the frame. The problem of "rainbow effect" in another - in consecutive colored flares, which can be visible to the naked human eye and irritate optic nerve. People who work with odnochipovymi DLP-projectors, to exercise increased eye fatigue, headaches occur. That is, suffered precisely those authorities who are responsible for visual perception. The solution to this problem for developers of technology, it was obvious - increasing the speed of change of color. Question upersya in the mechanics - to increase the speed of rotation of "color wheels" were needed sverhdorogie elements (bearings, etc.). That is, achieving even tripling the value of speed, namely 180 revolutions per second, required major technological costs. The issue decided in another way, increasing the speed of just four times - "color wheel" was not divided into three as before, and a six-colored segments. DMD-chip has been successfully updated, but it has affected prices. And now, DLP-projectors can be divided into the budget (from Three "wheel"), expensive (from shestitsvetnym "wheel" in the range of $ 5000 - $ 10000) and very expensive (without wheels, but with three DMD-chip operating on the principle of LCD -projectors). Is there an advantage to the DLP compared to LCD? Yes. The fact is that the light beam in the LCD-projectors works for transmission, which is passing through a matrix of the DLP, it does not affect or impact of mikrozerkal. The second technique is much better in terms of contrast. This time, incidentally, very well played into the hands of DLP-technology in nizkobyudzhetnom range, which feature the contrast greater than competing LCD-model several times, with nearly the same brightness values. A segment of very expensive equipment manufacturers of DLP-projectors are trying to use the three-DMD-chip without any "color wheel". For example, in Russian stores can be found DreamVision X3 projector at a cost of $ 45,000, which is positioned as one of the most high-quality models of modernity. It establishes three-chip HD2, each responsible for a certain color. Among the professional models on a large audience is also to provide NEC XT9000 ($ 85,000), which is also used trehchipovy DMD-standard. In general, the "rainbow effect" is not scientifically proven (at least I have not seen this), but it is written producers expensive DLP-projectors selling model with shestitsvetnym wheel. So, the problem is. More expensive models of LCD and DLP with three chips, they often vary in value. As part of the LCD-higher price range of devices used very large in size and expensive TFT-matrix. In addition to block imaging at a price significantly affect other equally important elements - replacement lenses complex and high-quality, programmable digital control, Wi-Fi, mnogolampovye cascades. In the design of the shell sets special cooling system, noise reduction, filters that protect against infiltration of dust, etc. I've heard of CRT and D-ILA-projectors. What is it? This is the same thing? Cathode-ray tube (CRT for short, in English - CRT, Cathode-Ray Tube) - is the main element of the old-generation TVs. Their main advantage - the use of an analog signal as the source. At this point it makes no sense to go into the details of the device TVs, but is worth noting that the CRT (or CRT) projectors have long been known, their structure implies the existence of three cathode ray tubes, emitting red, green and blue colors on the screen through special lenses. The technology DLP and LCD is the idea of splitting the picture at the point (pixels). And so interesting to look like a model of the standard D-ILA. This formulation is unique and incorporates three technologies at once. For each of the three colors is a source of the image (CRT), which transports it to a liquid crystal. For the crystal is a mirror and beam passing through a matrix of affected or not affected. In principle, this technology incorporates shortcomings LCD, namely, the passage of the beam "on clearance" (in fact before the mirror beam passes through the matrix), but at the same time, it eliminates or nearly eliminates discretization output image. D-ILA in our market can be found in a series of projectors JVC DLA. For example, JVC DLA-SX21 ($ 7800) with miniature matrices of 0.7 inches. Looking specifications, the brightness of this model is a 1500 lumen (ANSI), the contrast of 800:1. These features can be found at the projectors less than $ 1000, but should focus primarily on visual comfort. Technology D-ILA today one of the best, if not to speak of trehchipovyh doroguschih LCD and DLP. In conclusion, Current projections have gone far from our understanding "filmoskopov." This whole high-tech industry. Undoubtedly, the projectors are seen as part of the "digital home" future, but, nevertheless, should understand the essence of what is happening ...