Written by Admin in Home Theater Projector
Feb 9 th, 2012
Home Theater Projectors incorporate an internal lamp, a specialized lens system, and internal circuitry, motors etc. for the purpose of displaying computer images or entertainment videos such as movie, games, and television programs onto large wall or movie screen spaces.
The distance separating the movie screen and the lens of the projector is called the throw distance. A projectors throw distance is affected by factors such as whether the projector has a zoom lens as well as the size of the screen.
A Home Theater Projector is often mounted on the ceiling; therefore, it is not perfectly centered perpendicular to the movie screen. This positioning causes the picture to appear distorted relative to the height it’s mounted in relation to the movie screen.
Projectors have a feature usually called Keystone Correction that allows the operator to make adjustments so the projected image is in fact rectangular on the movie screen. Depending on the projector you’ll want to consider between remote control keystone correction and manual correction. In permanent installations Keystone correction is adjusted one time, during the installation. However, then the projector is moved around often as with presentations etc. then keystone corrections are usually made each time.
DLP or, Digital Light Processing, Home Theater Projectors consist of multitude of mirrors where every mirror represents a pixel component. A Home Theater Projector having 1920 x 1080 resolution has over 2 million very small mirrors. Every mirror is attached to a hinge that is driven electronically those controlling the amount and color of light projected through the lens onto the movie screen.
LCD or, Liquid Crystal Display Home Theater Projectors utilize a pixel element for re-producing images in color. LCD Home Theater Projectors incorporate three separate LCDs one for each of the RGB color scheme of Red, Blue and Green and are separated using mirrors. These 3 colored light beams are then recombined before the lens and then projected onto the Movie Screen surface.
LED or Light Emitting Diode is a light generating technology that uses a single color light emitting diode when electrically charged. The colors from numerous diodes are then combined and projected through the lens onto the movie screen.
When a director films a movie typically it’s filmed in a very wide format, wider than the width of even today’s flat panel high definition TV. When these films are projected onto a movie screen the image has to be stretched to the full width of the screen in order to view it as the director filmed the movie. Enter the Anamorphic lens, it’s typically an additional lens added to a projector capable of supporting anamorphic; not all projectors support the addition of an anamorphic lens.
Typically when a Home Theater movie projector is installed Surround Sound is also installed.
Welcome to All About Home Electronics virtual help service!
Input your email address to get started. By becoming a user of our site you are agreeing to the Terms of Service