【 Weak current College 】 projector when selects and purchases should pay attention to what issues---Power By 【 China power house network 】

Is the household or commercial?

For home users on purchases of projector before it is important to first understand what we need is the home machine, and not commercial machines, do not listen to businesses, think of how commercial machine can also be used at home. Household machines and the purpose of commercial machine, mainly used to watch TV, magnifying piece, play games, in the parameter configuration, feature set and interface integration on the nature and business machines.

Is the LCD or DLP?

LCD (LCD) projector is the most common, it has the advantage that the resolution is high and low price, high brightness, colorful, screen brightness, can reproduce all colors; real disadvantage is the LCD itself does not glow, the nature of the work affected by the temperature impact large, individual products have doors. DLP projector is an all digital reflex projection technology, it's smaller, digital technology allows images to grayscale, precise image quality and stability and low noise. Although the color reproduction is slightly better, but the black area is almost a true black, pixel edge will not appear in some Flash LCD and shadow, so show some fine lines, DLP projection than LCD projector more sharper, more black and white, grayscale levels more pure. Only current products prices are slightly more expensive, and some products will have a rainbow phenomenon. In short, the present two projector has its advantages, in the home areas haven't which projector prevail, so we choose when or whether you want to see the actual performance of the individual, not simply look at the display technology and blindly buy.

Is 4: 3 or 16: 9?

The present terms, such as a TV source, of course, to select 4: 3; if to watch DVD films, and then select screen horizontal vertical ratio of 16: 9 standard products. In theory, 16: 9 format is best for people watching habits, also accessible Telepresence effect, so some type of monitor more to 16: 9 size, and the future of television signals will be in this format for playback, some products support 16: 9 and 4: 3 dual display mode to switch freely, but the default projection mode is 16: 9 format products in order to obtain better widescreen effect.

Spend ten or twenty thousand?

Price, consumers themselves have a voice. In projector products, after all, a penny a permanent quest for truth in the vast majority of cases was established.

The level parameter choice has

The projector has a lot of nominal parameters, but one of the most worthy of our attention are brightness, contrast, resolution, consumables costs and after-sales service, etc.

Brightness in moderation

Brightness is most willing to take out to show off in the capital, has long been the pursuit of the brightness, enthusiasm has not reduced, higher brightness projector price is comparatively high. But because of the relatively limited family space, the screen size, brightness and does not require very high you can get a nice drop shadow effect. In general the following demo environment 20m2, 600 to 80OANSI lumens is sufficient; around the 20th ~ 90m2, lumens to reach 800 ~ 140OANSI; while only need only 90m2 above 1400ANSI lumens projector. In addition, the brightness of excessive and does not necessarily bring the good projection effects. Because excessive brightness in the absence of a higher contrast support cases, and not the picture quality performance vividly and in relatively narrow space, a long time to watch the high brightness of picture quality, on-sight is very negative. In addition, the long time projecting high brightness not only electricity, but the lamp aging speed will accelerate, so home projector brightness must be moderate, General 800ANSI ~ 1400ANSI brightness can meet most of the family to use.

Moderate contrast and brightness

Contrast is the projection of the projector screen to the brightest and darkest areas of influence ofthe Visual effect is second only to the brightness of the indicators. Generally speaking, the greater the contrast, sharper image, the better sense of depth, especially movies use dark, high-contrast in home theater-level is particularly important in the product. In fact it is closely related and brightness of a parameter, in order to make different brightness, different contrast products comparable, there is not very accurate, but very useful skills, is to use the most high-brightness projector contrast value, divided by the essentially all black when the value of brightness, a statement to the effect that the products of contrast and brightness matching better, black characteristics, the better.

Resolution for high note matches

Resolution on behalf of the projector's performance level, the higher the resolution, the more the projector displays images and smooth, General resolution SVGA (800 x 600 pixels), XGA (1024 × 768 pixels), SXGA (1280 × 1024) three, its compatibility resolution than its physical resolution of a higher level. Of course, can also be backward compatible. On a compatible display resolution of the image may be missing some information. Of course, the higher the resolution, the higher the price, the user's choice is not very large, General million products to 800 × 600 pixels, 2 million products to 1024 × 768 pixels, 3 million of high-end products 1280 × 1024 or higher resolution is very common.

Consumables costs lower, the better

The bulb is the projector only supplies, prices generally occupy the whole projector price of nearly one quarter. And after-sales service, the bulb is individually warranty. So purchase overstated. In addition product operation simplicity, noise and extended interfaces to give appropriate attention.

Identification of parallel imports

For genuine, first, the warranty is structured at a glance, manufacturers provide services directly, evaporation "agents" do not fear. However, ifyou bought is a parallel,The service would not be able to guarantee that, and if you encounter a turn new product, it may lose big. Good service, we can use safely, and want to get really good service, then master the skills to identify parallel imports is essential.

On the Chinese market remains rampant parallel projection and parallel projection refers to foreign countries, Hong Kong, Macao, Taiwan without normal customs channels into the internal market of the product, its main purpose is to avoid tariff or the drug had been improper alterations without entering through the normal channels. Because the product is not designed for the domestic market, so it may lack some suitable function. And product origin, quality can not be guaranteed. Of course, the parallel overhead projector does not exclude it as original as possible, but the goods through market research found that a few of the parallel overhead projector are adapted for faulty goods, and basic with no possibility of domestic manufacturers warranty.

Many articles are introduced parallel recognition of skill, in fact, apart from maintaining the usual purchase mentality, to manufacturers duly authorized agent Office, the most important thing is to see the product availability "3C" certification mark.

Sale of the Mainland of China machine display device such as a projector, you must pass the national certification bodies designated by the competent certification, obtained the compulsory product authentication certificate and sign the "3C" marketed sales. So General in the projector outside the box has 3 c compulsory certification test flag, if not, then this product is most likely with the Mainland, or give up.

In addition to check whether the projector comes with product manufacturers to provide information on the content, in particular, it is necessary to have printed clear user manual and the original domestic product warranty card.

Also, each projector has a unique serial number, and the projector is on the packaging manufacturers free Tel, a dozen natural heart.

Projector is essential, but avoid after-sale service buy parallel imports is the first condition, no good after-sales service for security, the cheaper the projector will not feel at ease to use. Finally, to the very careful friend out an "ass" idea, take the projector to the corresponding manufacturer's maintenance station for professional testing, to a completely at ease.

Coddled

Projector is bought, but it is after all not as good as the TV and set to the machinery, LCD or DMD, electronic circuit technologies, but also among many. In order for the new to the road, friends can quickly master the use of skills, we sum up a few little caveats, I hope you enjoy the home cinema brings Super shocked, let your love machine also work well with.

Avoid a collision: in all large screen displays, projectors for mobility best, so the impact on the opportunities that the projector is a precision instrument to LCD projectors, LCD tablets of strong earthquakes can cause, effect of displacement during show the convergence of three pieces of LCD, RGB colors do not coincide, and the optical system of the lens, reflector will also have the effect of deformation or damage, and the effect of image projection lens in impact makes rail damage, resulting in death, even the camera card cracked lens cannot be used. Therefore, avoid strong collision is novice must pay attention.

Note the ventilation: projector itself is a fever big, its stable work fully benefited from the good ventilation system, if you leave the projector room too small vent, or clogged filter dust network, the projector will rapidly rise in temperature, impact of the drop shadow effect, and even cause protection shutdown. And lamp life will also be greatly impaired.

Reduce the switch, note sequence: first-time use projector, some may think that the projector is just like a regular TV,would like to open it, want to shut it off, and you want to close, you can cut off the power. In fact, such action on the projector bulb life injury particularly big, so to minimize the number of switching machine, and be sure to follow the sequence of instruction guide.

Non Plug: new machines, various features are sure to give it a try. But no plug cable and signal source and projector power best unified grounding. Because of the projector to a power standards have strict requirements, the projector using the outlet must be compatible with the projector's voltage nominal value, free to use the power outlet, likely projection power cannot match, easily bulb exploding occurred. And the best signal source and the projector is connected to the same socket, so that it can effectively avoid two socket line exists between zero potential difference to input circuit of projector.