Video Projector Specs

In the world today when video presentations are an important mode of communication in case of classroom training as well as for professional purposes, video projectors are extremely significant in such purposes. Video projectors function by means of acknowledging the signs emitted by a video signal through a lens and projects the corresponding images on the projection screen. Rear-projection screens and rear projection TV or RPTV also aid the formation of video projectors by leading to the formation of a single unified device which is popularly used nowadays in case of home theater systems. Each video projector is imbibed with display resolutions of varying frequency. These include XGA (1024 x 768 pixels), SVGA (800 x 600 pixels), 1080p (1920 x 1080 pixels) and 720p (1280 x 720 pixels).

While it cannot be denied that the cost of a video projector is definitely determined by the frequency of display resolution, there are also certain other factors which are equally significant. These comprise of acoustic noise output, light output and several other characteristics. It is true that video projectors use very bright light in order to project the images on the screen but advanced technological tools have allowed it to ensure that there are no blurred or defective images and thus ensure efficient functioning. The quality of light required depends on the size of the projection screen which is again determined by the size of the room or location where it is to be projected. The amount of light output necessary is measure by means of a unit called lumens. The amount of lighting necessary for different mediums have been ensured by the American National Standards Institute or ANSI according to which for small screens around 1000 to 1500 lumens is sufficient while it is between 1500 to 3000 lumens for medium screen sizes. For larger display screens the light output needs to be over 3000 lumens. The major manufacturers include Panasonic, Samsung, Hewlett Packard, Sony, Mitsubishi, EIKI, Toshiba etc.