How to choose a home projector

[ Huaqiang Security Network News ]

Many of the friends who plan to buy a projector are often not familiar with the projector, and they are all ignorant. So how do we buy a home projector?

Home projector

Optional home projector factor 1: video bandwidth

The video bandwidth of the projector refers to the total bandwidth of the video channel. The value is the upper limit frequency of the output projection signal when the amplitude of the projected input signal drops to 0.707. Since the 0.707 times corresponding bandwidth increment is -3db, the video bandwidth is also commonly referred to as -3db bandwidth. Video bandwidth is an important performance indicator of the projector. It is also an evaluation standard for measuring the performance of the projector. The performance level is different from the projection resolution of the projector in the horizontal and vertical directions, and the vertical direction. Regarding the size of the scanning frequency, it is usually necessary to increase the display bandwidth of the projection screen, and it is necessary to increase the video bandwidth of the projector.

Optional home projector factor two: brightness and contrast

Many friends ask whether the higher the brightness, the better. When you buy a business machine, if you buy a business machine, of course, the higher the brightness, the better, because the business environment is large, and the light is strong. It is not the same. For individual users, it is not a good thing to be too bright. The brightness of a typical home projector is around 800 lumens to 1200 lumens. Regarding contrast, that is the higher the better. The higher the contrast, the sharper the image, the brighter the color, and the better the details.

Optional home projector factor three: projection screen

According to the complexity of the manufacturing process and the surface coating, the projection screen is generally divided into a common white screen and a bead screen. The ordinary white screen is made by spraying white paint on special fabrics and doing simple processing. It is characterized by low price, wide viewing angle and soft visual effect. The disadvantage is that the gain on light is small, so it is only suitable for use in homes where the background light is not strong, otherwise it needs to be used with high-brightness projectors. The bead screen is made by spraying tiny glass powder on a 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 be darker. At the same time, it is not suitable to roll up repeatedly, otherwise the glass beads will fall off easily and affect the use effect.

Optional home projector factor four: resolution and aspect ratio

Buy a home projector, of course, to buy affordable and real models, so be sure to know which parameters will be linked to the price. The resolution we have mentioned below has a lot to do with the price of the projector. The higher the resolution, the clearer the image of the projector, and of course the higher the price. In the long run, if economic conditions permit, it is best to buy a projector with a physical resolution of XGA, which shows a clearer and brighter effect. When purchasing a projector, you must ask clearly whether the projector's true projection ratio is 4:3 or 16:9. Most DVD sources now use the "16:9 variable wide screen" mode, followed by the HD standard. Requires a TV screen with an aspect ratio of 16:9, and a home projector ratio of 16:9 will follow the trend.

Through the analysis of the above characteristics of the home projector, we have already had the standard to buy a home projector, I believe it will help the future purchase!

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