看投影需要投影幕,这是投影设备特别是高清投影设备的基本配置(虽然也有特例,例如使用屏幕漆,但效果仍等同于投影幕)。不用银幕而只以白墙来代替行不行?硬要这样做当然行,但效果差了很多。如果投影机是两三千元的低端机甚至是更便宜的DIY机,投在白墙上自然是一种既省钱又说得过去的选择。但如果您购用的是高清机,市价好几千、一两万甚至好几万, Looking at the projection requires a projection screen, which is the basic configuration of the projection device, especially the HD projection device (although there are special cases, such as the use of screen paint, the effect is still equivalent to the projection screen). Not only the white screen instead of the screen to replace the okay? Hard to do so, of course, but the effect a lot worse. If the projector is two or three thousand dollars of low-end machine or even a cheaper DIY machine, cast on the white wall is naturally a way to save money and put it in the right place. However, if you are using a high-definition machine, the market price of several thousand, twelve or even tens of thousands,