Dell Mobile M115HD Dell M115HD User Guide - Page 60

Focal Length, Frequency, Hz Hertz, Keystone Correction, Maximum Distance, Maximum Image Size

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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. 60 Glossary

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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
60