1, the projector can direct the wall, and the LED mini-projector can direct the white wall. There are no advantages or disadvantages, but you are demanding yourself. You should appreciate it better before buying curtains, but it's not much difference.

The projector should draw curtains to make the image clear. Simply put, the highlight projected by the projector is actually a kind of light. If it is light, it will be brighter in a dark place. But in fact, many projectors are very clear now even without a curtain. Each projector has different characteristics, which may not be suitable for you, and expensive projectors may not be good. When buying, you need to imagine what you are buying, and then you will know what to buy.

3. Pay attention to the brightness and resolution of the projector and the light source for comparison when purchasing. These are all projectors that determine what level a projector is.

The light source used by the projector is to determine whether it is harmful to human body. Metal halogen bulbs, UHE bulbs and UHP bulbs are the mainstream of projection bulbs at present. They are all used in traditional large projectors. These light sources are harmful to human body and are not easy to use for a long time. Moreover, the life of these bulbs is short, but the brightness of these light sources will be higher and the projector size will be clearer. If you want a harmless projector, it is mini-projector with LED light source. If LED light source is used, it has no radiation, environmental protection, no harm to human body and long service life. Normal use does not need to change the light bulb, it can be used for ten years. But its disadvantage is that the brightness is not so high. At present, the maximum brightness is 500 lumens, and the grain size can be about 120 inch, which is only suitable for home theaters or small offices.

I hope I can help you.