Dell Mobile Projector M115HD User Manual

Page 60

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FT high, 12 FT wide, screen has a diagonal of 15 FT. This document
assumes that the diagonal dimensions are for the traditional 4:3 ratio of a
computer image as per the example above.

DLP

®

— Digital Light Processing™ — Reflective display technology

developed by Texas Instruments, using small manipulated mirrors. Light
passing through a color filter is sent to the DLP mirrors which arrange the
RGB colors into a picture projected onto screen, also known as DMD.

DMD

— Digital Micro-Mirror Device — Each DMD consists of thousands of

tilting, microscopic aluminum alloy mirrors mounted on a hidden yoke.

Focal Length

— The distance from the surface of a lens to its focal point.

Frequency

— It is the rate of repetition in cycles per seconds of electrical

signals. Measured in Hz (Hertz).

HDCP

— High-Bandwidth Digital-Content Protection — A specification

developed by Intel™ Corporation to protect digital entertainment across
digital interface, such as DVI, HDMI.

HDMI

— High-Definition Multimedia Interface — HDMI carries both

uncompressed high definition video along with digital audio and device
control data in a single connector.

Hz (Hertz)

— Unit of frequency.

Keystone Correction

— Device that will correct an image of the distortion

(usually a wide-top narrow-bottom effect) of a projected image caused by
improper projector to screen angle.

Maximum Distance

— The distance from a screen the projector can be to

cast an image that is usable (bright enough) in a fully darkened room.

Maximum Image Size

— The largest image a projector can throw in a

darkened room. This is usually limited by focal range of the optics.

Minimum Distance

— The closest position that a projector can focus an

image onto a screen.

NTSC

— National Television Standards Committee. North American

standard for video and broadcasting, with a video format of 525 lines at 30
frames per second.

PAL

— Phase Alternating Line. A European broadcast standard for video

and broadcasting, with a video format of 625 lines at 25 frames per second.

Reverse Image

— Feature that allows you to flip the image horizontally.

When used in a normal forward projection environment text, graphics, etc.
are backwards. Reverse image is used for rear projection.

SVGA

— Super Video Graphics Array — 800 x 600 pixels count.

Glossary

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