Browse Definitions :
Definition

digital projector (digital projection display system)

1) A digital projector, also called a digital projection display system, is a specialized computer display that projects an enlarged image on a movie screen. Such devices are commonly used in presentations.

There are two main types of digital projection display systems. The older, less expensive type employs three transparent liquid-crystal-display (LCD) panels, one for each of the primary colors (red, green, and blue). The light transmittivity of each pixel varies depending on the image data received from the computer. The light from a lamp is directed through the LCD panels, collimated using a lens, and projected onto a screen. The overall construction of the device is similar to that of a slide projector, where the "slide" consists of the three LCD panels placed close together near the focal point of the projection lens. Advantages of LCD technology include efficiency, ease of brightness and contrast adjustment, and high image resolution .

A newer, more expensive scheme is known as Digital Light Processing (DLP), a proprietary technology developed by Texas Instruments. In a DLP display, tiny mirrors are used instead of transparent panels. Each mirror represents one pixel. The light, rather than passing through the panel, is reflected from it. The mirrors move back and forth, varying the amount of light that reaches the projection lens from each pixel. Color is obtained by passing the light from the lamp through a rotating wheel with red, green, and blue filters. This subjects the mirrors to light at each of the primary colors in a rapid rotating sequence. The result is a color-modulated image that the human eye sees as natural color. Advantages of DLP technology include light weight, high contrast, and lack of pixelation.

2) The term digital projector is sometimes used for a program that facilitates the viewing of three-dimensional (3D), interactive, full-motion audio-visual files on a personal computer. Versions are available for both IBM-compatible and Macintosh computers, and can be downloaded from the Internet. They can be used as plug-ins for popular browsers for viewing animated Web-page content. For optimum performance on the Internet, a broadband connection should be used because of the high-speed, interactive nature of the content, and because the transmitted files are often large.

This was last updated in March 2011

Continue Reading About digital projector (digital projection display system)

Networking
  • network management system

    A network management system, or NMS, is an application or set of applications that lets network engineers manage a network's ...

  • host (in computing)

    A host is a computer or other device that communicates with other hosts on a network.

  • Network as a Service (NaaS)

    Network as a service, or NaaS, is a business model for delivering enterprise WAN services virtually on a subscription basis.

Security
  • WebAuthn API

    The Web Authentication API (WebAuthn API) is a credential management application program interface (API) that lets web ...

  • Common Vulnerability Scoring System (CVSS)

    The Common Vulnerability Scoring System (CVSS) is a public framework for rating the severity of security vulnerabilities in ...

  • Dridex malware

    Dridex is a form of malware that targets victims' banking information, with the main goal of stealing online account credentials ...

CIO
  • audit program (audit plan)

    An audit program, also called an audit plan, is an action plan that documents what procedures an auditor will follow to validate ...

  • blockchain decentralization

    Decentralization is the distribution of functions, control and information instead of being centralized in a single entity.

  • outsourcing

    Outsourcing is a business practice in which a company hires a third party to perform tasks, handle operations or provide services...

HRSoftware
  • team collaboration

    Team collaboration is a communication and project management approach that emphasizes teamwork, innovative thinking and equal ...

  • employee self-service (ESS)

    Employee self-service (ESS) is a widely used human resources technology that enables employees to perform many job-related ...

  • learning experience platform (LXP)

    A learning experience platform (LXP) is an AI-driven peer learning experience platform delivered using software as a service (...

Customer Experience
  • Net Promoter Score (NPS)

    Net Promoter Score (NPS) is a metric that organizations use for assessing customer loyalty toward their brand, products or ...

  • B2C (business-to-consumer)

    B2C, or business-to-consumer, is a retail model where products or services move directly from a business to the end user who has ...

  • market segmentation

    Market segmentation is a marketing strategy that uses well-defined criteria to divide a brand's total addressable market share ...

Close