Updated: 05/06/2024 by Computer Hope
ViewSonic Projector

A projector is an output device that takes images generated by a computer or Blu-ray player and reproduces them on a screen, wall, or another similar surface. For example, you could use a projector to display a presentation in a board room so that a large audience can view it.

In most cases, the projection medium is large, flat, lightly colored, and not reflective. Projectors can produce either still (slides) or moving images (videos). A projector is often about the size of a toaster and weighs only a few pounds.


This type of projector may also be called a data projector, digital projector, image projector, or video projector.

How are projectors used today?

The following list contains different uses for modern projectors.

  • Display a PowerPoint presentation at a business meeting.
  • Share a teacher or professor's computer screen to enhance a lecture in school.
  • Project a movie on a large screen.
  • Demo a product or service at a convention center.
  • Transform a wall, house, or another object to give it a different appearance. See projection mapping for further information.

When was the first projector invented?

While Kodak released their Model 550 in 1961, the first patent for carousel slide projector was applied for on May 11, 1965 by a man named David Hansen. The digital projector we know today was created by Gene Dolgoff in 1984, although he thought up the concept for it in 1968.

How does a projector get its input?

Today, most projectors use either an HDMI (High-Definition Multimedia Interface) cable or a VGA (Video Graphics Array) cable from a computer or other electronic device as their input source.

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