Among the large list of consumer video equipment, a large-format projector appeared not so long ago and is still not too common. Most often this device is used for educational programs in schools, lyceums, universities, libraries, as well as in cinemas. All these devices, depending on their purpose, have functional differences and, apart from everything else, they also differ in price.
Projector specifications
As already mentioned, when choosing a projector model for a cinema, training or home use, you should consider the type of matrix, resolution, presence or absence of various network interfaces, as well as the ability to adjust brightness, contrast, lighting, and the presence of built-in speakers.
A layman does not have enough to buy a device, and the main thing that should be paid attention is the resolution of the projector, because the quality of the picture on the screen depends on it. There are several different formats, the number of pixels which varies from 640x480 to 2048x1536 for 4: 3 format and from 854x480 to 4096x2400 for 16: 9 and 16:10.
Sources of information for the projector
Depending on the purpose of the projector, as well as on its price category, there are models that have the ability to connect to a computer and, respectively, the Internet, to a DVD or to have a connector for a flash drive. Other models are equipped with a memory card slot, and the most advanced ones have built-in WiFi, which allows working without a wired connection.
Screen
It is best to immediately purchase a large screen for the projector, for watching movies. But for schools or lyceums the compact screen , which will be quite enough for carrying out of presentation at a lesson or library is perfect. If there is a possibility not to save, it is better to purchase a device with adjustable luminous flux, through which you can view slides, presentations and movies in any light room.