1, depending on the space size. The size of the space is the size of the living room, audio-visual room, etc. Where you use the projector. If your living room area exceeds 20 square meters, you can consider buying a projector; If it is insufficient, it is not recommended. The distance between the projection screen and the sofa should be more than 4 meters, otherwise the viewing effect is not good and it is easy to damage the eyesight.
2. brightness. Brightness is one of the most important indicators for choosing a projector. Now the price of projectors is getting lower and lower, and the brightness is getting higher and higher. Products with 2000 lumens are already very popular. But does home projector need such high brightness? High-brightness projection images will damage vision for a long time. In fact, in the case of dark background light, an 800 lumen projector can already meet the demand. If you don't project at home during the day or when the lights are bright, then the product with 800- 1000 lumens is enough, even if the background light is a little brighter, the product with 1200 lumens is enough.
3. Noise. I've never used a projector, and I didn't know it would make noise. The noise of some projectors will be seriously watched and unbearable. When buying a projector, considering low noise should be an important item in the purchase. At present, many manufacturers have introduced low-noise projectors, and the price is not expensive. Generally speaking, products with noise below 40dB are acceptable, but when you buy them, you should listen to them in a quiet environment and compare them to see if they will interfere with you.
4. Select DLP or LCD. It doesn't really matter whether it's LCD or DLP. What we need to see is the effect of the projector, and the effect of a projector can not be separated from many things such as lens, light bulb and circuit. In principle, LCD projectors are the most common and the prices are correspondingly lower.
5. Select the appropriate function. When using the projector, the position of the projector should be at right angles to the projection screen as far as possible to ensure the projection effect. If they can't be vertical, the picture will be trapezoidal. If we don't hang it, but put it on the table, it is difficult for us to ensure "vertical". In this case, we need to use the "keystone correction function" to correct the keystone to ensure that the picture becomes a standard rectangle. There are usually two methods for trapezoidal correction: optical trapezoidal correction and digital trapezoidal correction.