data projector

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data projector

A device that projects computer output onto a white or silver fabric screen that is wall, ceiling or tripod mounted. It is widely used in classrooms and auditoriums for instruction and slide presentations. For projectors designed primarily to display movies, see front-projection TV.

A data projector has HDMI inputs for Blu-ray/DVD players, set-top boxes and computers. It may also have a VGA input for older computers, and earlier projectors had analog video interfaces (composite, component and S-video). See DLP and 3LCD.

Increasingly Smaller and Lighter
In the 1980s, the first data projectors weighed more than 40 pounds, using a single cathode ray tube (CRT) to project a monochrome image. When color units came out, they weighed even more because of their three CRTs (red, green and blue). CRT projection systems gave way to considerably smaller units.

In the 1990s, projectors became transparent LCD panels, but although significantly lighter than CRTs, they required an overhead projector for illumination (see LCD panel). After the turn of the century, stand-alone projectors shrank to a pound or two (see pocket projector), and within a few years to only a few ounces (see microprojector). See extended desktop mode.

The Good Old Days
Starting in 1980, Alan Freedman, author of this encyclopedia, lugged a monochrome data projector to the computer literacy classes he taught to non-technical managers. Projector, computer and rolling cases weighed over 100 pounds.

Twenty Years Later
In 2000, using Texas Instrument's DLP technology, Compaq introduced the four-pound MP1400, one of the first lightweight data projectors. (Image courtesy of Compaq Computer Corporation.)

Another Decade Later
In 2012, ViewSonic introduced its Pico projector, weighing less than a pound. (Image courtesy of ViewSonic Corporation,
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References in periodicals archive ?
The UCSB digital classroom shown in Figure 1 has three ceiling mounted data projectors that project on standard projection screens, two presentation laptop computers with signal interfaces at the front of the room, and one presentation desktop with signal interface at the back of the room.
Using the data projector, the computer lab instructor shows how the calculator program works and calls out a few practice problems for the students.
Westgate Primary School has been given pounds 2,500 for an interactive whiteboard and data projector.
The SMART Board from SMART Technologies Inc., is an interactive white board that works with a computer and data projector. The computer image is projected onto the Board, and instructors press its large, touch-sensitive surface to access and control computer applications.
This year, the media center includes all Dell PCs and laptops and a 30-computer station with a ceiling-mounted video data projector. Students can access the Internet, Microsoft Office and Plato, a curriculum software package.
A Sony data projector was stolen from a Mondeo at the Hilton Hotel, Stratford Road, Longbridge, near Warwick, and four cars were attacked at Chesford Grange Hotel, near Kenilworth.
ELMO's new Model EDP-3100 is their lightest and brightest LCD multimedia data projector to date.
Based on active-matrix LCD technology, the Mediashow data projector from Sayett produces computer images in 79,507 colors; when used with an optional video decoder, it will project 256,000 colors.