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An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector .
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal ...
Some widescreen LCD monitors optionally display lower resolutions without scaling or stretching an image, so that the image will always be in full sharpness, although it will not occupy the full screen. This is most often recognizable upon close inspection, as there will typically be black edges visible on either side of the panel horizon.
The main benefit of this screen aspect ratio is a constant display height when displaying other content with a lesser aspect ratio. The 64:27 aspect ratio of "21:9" is an extension of the existing video aspect ratios 4:3 (SDTV) and 16:9 (HDTV), as it is the third power of 4:3, where 16:9 of traditional HDTV is 4:3 squared.
The eye's perception of display resolution can be affected by a number of factors – see image resolution and optical resolution. One factor is the display screen's rectangular shape, which is expressed as the ratio of the physical picture width to the physical picture height. This is known as the aspect ratio. A screen's physical aspect ratio ...
Used to display one of the first mass-market full-time GUIs, and one of the earliest non-interlaced default displays with more than 256 lines of vertical resolution. (Early models used a 384×256 screen; both standards are cut down from the 720×364 of the preceding Lisa model) 512×342 (175k) 512 342 175,104
Projection screen in a movie theater Home theater projection screen displaying a high-definition television image. A projection screen is an installation consisting of a surface and a support structure used for displaying a projected image for the view of an audience.
Air-coupled projector CRTs have a front flat face that also acts as a container with coolant, and there is an air gap between the face of the CRT and the flat back lens used for projecting the image formed by the CRT onto a screen. Liquid-coupled projector CRTs have a curved-inwards face with coolant and (on the side that faces the CRT's ...