Projector is a device that emits light rays which gives visual representation of films or images on the screen. A projector cannot work as an item, rather it works as a holistic component. The major components are the projector and screen. However, it’s not compulsory to use a screen. Images and videos can be projected on walls. But nothing works better than using a screen as it gives you the perfect representation of what you want.
Projectors can be found in a variety of environments, including classrooms, conference rooms, homes and yards. They can be used for delivering lectures and presentations to large number of people, as well as watching movies and other videos at a backyard home theater. They range in size and capabilities, from handheld devices that need a dark room to deliver viewable images to high-powered devices that are easily read, even in bright environment.
DLP projectors
DLP and “Light Valves” are the newest forms of projector technology. Most projectors create their images and videos by aiming bright light through small LCD panels which can be opened or closed to control the brightness and color of light at a given pixel on the screen. The panel grid blocks some of the light, which makes it an inherently inefficient process. However, DLP projector uses small chips containing arrays of tiny mirrors, which can be moved to control the brightness and color of light at a given pixel. This allows nearly all of the light output to make it to the screen. DLP projectors have limited display resolution. However, the display quality will be more defined and brighter than LCDs as well as a superior video quality. It is a great option for educational and business presentations.

Pros and Cons of DLP Projectors
DLP projectors require less maintenance because they have a filter-free and sealed chip design, which makes dust unable to settle on the chip and cause an image spot and more importantly makes them immune to color decay. In addition, they are not subject to the misalignments that occurs in LCD projectors with a three-panel design. However, DLP projectors with slower color wheels may give off a rainbow effect, which is when bright flashes of rainbow appear on the screen. Furthermore, poor viewing range may be another disadvantage, because most DLP projectors are not readily compatible with zoom lenses or lens shift functions, which means they are best suited to smaller environments. This would likely not be the best choice for a large home theater projector.