Home Projector What brand is good

Many friends who intend to buy home theater are often unfamiliar with home theater and have a smattering of home theater. So, how do we choose home Theater? Home projector What brand is good?

　Video Bandwidth

The so-called projector video bandwidth, in fact, refers to the total frequency band width of the video channel, the numerical size is in the projection input signal amplitude down to 0.707 times times, corresponding to the output projection signal ceiling frequency. Because 0.707 times times the corresponding bandwidth increment is -3db, video bandwidth is often referred to as -3db bandwidth. Video bandwidth is an important performance index projector, it is also a measure of the performance of the projector is an evaluation standard, the performance of the projector in the horizontal direction, vertical projection resolution size, the vertical direction of the scanning frequency, usually to improve the projection screen display resolution, You must increase the video bandwidth size of the projector.

　　Brightness and contrast

Many friends asked to buy the projector is not the brightness of the higher the better? In fact, if you are buying a business machine, of course, the higher the brightness, because the commercial use of the environment is large, and the light is strong, these and the home environment is not the same. For individual users, it's not always good to be too bright. The average home projector brightness is about 800 lumens to 1200 lumens. About contrast, that's the higher the better. The higher the contrast, the clearer the image, the bright colors, the better the details.

　Projection screen

According to the production process complexity and the different surface coatings, projection screen is generally divided into ordinary white screen and glass bead screen. The ordinary white screen is in the special-purpose fabric spraying white paint, and makes after the simple processing, its characteristic is the price is cheap, the angle of view is broad, the visual effect is soft. The disadvantage is that the light gain is small, so only suitable in the background light is not strong in the home, otherwise it needs to be used with high-brightness projector. The Glass bead screen is made by spraying tiny glass powder on the special fabric, which has the advantages of moderate price, wide viewing angle and high gain. The disadvantage is that the price is more expensive, and the color will darken, at the same time should not be repeatedly rolled up, otherwise the glass bead easy to fall off, affect the use of the effect.

　Resolution and screen ratio

Buy a home projector, of course, to buy affordable and real models, so be sure to know what kind of parameters will be linked to the price. The following we say the resolution on the price with the projector has a great relationship, the higher the resolution, the projector image clearer, of course, the higher the price. In the long run, if the economic conditions allow, it is best to purchase the physical resolution of the XGA projector, it shows the effect is clearer and brighter. When choosing the projector, you must ask clearly, projector real projection ratio is 4:3 or 16:9, now most of the DVD source is the use of "16:9 variable wide Screen" mode, followed by the HD Standard TV screen for the aspect ratio of 16:9, home projector ratio or select 16:9 will follow the trend of development.