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ANSI lumen |
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A unit to indicate lumen
brightness of projectors. ANSI (American National Standards Institute) has
established the standard for measurement of lumen brightness. The lumen
brightness value measured under this method is shown as ANSI lumens.
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Aspect Ratio
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The ratio of width to height of
picture. The aspect ratio of most computer pictures and normal video
pictures is 4:3.
HDTV provides 16:9 aspect ratio to cover various wide
screen sources.
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ATA Card
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See " PC
Card
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Auto Position
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A one-touch function to perfectly
fit the signal format in the projector to the signal format actually fed
from the computer. By activating this function, the picture quality
projected on the screen becomes perfectly synchronized.
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Brightness
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A user adjustment to increase or
decrease the average brightness of the picture.
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Color Matrix
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See " Natural Color
Matrix
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Color Temperature
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A measurement of white color
chromaticity as a result of a balanced mixture of red, green and blue.
Higher color temperature gives bluish white (cool white) and lower color
temperature gives reddish white (warm white).
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Component Video Signal
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Most advanced video signal format.
Separated to luminance signal and two color component signals. Two
different formats available (High-end DVD players provide Y.CB.CR.
component video signal. HDTV decoders provide Y.PB.PR. component video
signal.)
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Composite Signal
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A traditional video signal format.
Luminance signal and chroma (color) signal are consolidated into one video
signal in this format while they are split in S-Video (or S-VHS) signal
format. Usually interfaced through RCA plug and jack. (Also see " RCA Connection
".)
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Contrast
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A user adjustment to increase or
decrease the contrast between the bright area and dark area of a
picture.
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Contrast Ratio
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The ratio of the maximum white to
the minimum black on the projected test picture. Larger ratio gives higher
contrast.
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Digital Expanded Zoom (Expand)
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A feature to magnify desired
portion of projected image.
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DLPTM
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Acronym for Digital Light
ProcessingTM. A projection system using a micro-mirror reflection device
and a color wheel. Because of its compact size, DLPTM is more suitable for
ultra-portable and micro-portable projectors.
* Digital Light
Processing and DLP are trademarks of Texas Instruments.
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DMDTM Chip
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Acronym for Digital Micro-mirror
DeviceTM. A reflection device used in DLPTM systems. 786,432 (for XGA) or
480,000 (for SVGA) of micro-mirrors are located on the surface of DMDTM
chips and each mirror tilts its light reflection angle so that a bright
part or a dark part of a picture is produced.
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Digital Interface
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The new generation interface
between computer output and projector (or monitor) input. Instead of
traditional interface with an analog signal, a digital signal is used
through DVI cable so that picture quality is not distorted and
synchronization is more stabilized. Only applicable when digital signal
output from computer and digital signal input terminal on projector (or
monitor) are provided.
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DVI
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A signal cable connected between
computer output and projector (or monitor) input for digital signal. See
" Digital Interface
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Expand
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See " Digital
Expanded Zoom
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HDTV
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Acronym for High Definition
TeleVision. A new generation television standard using 1125 retracing
lines and higher aspect ratio for higher resolution picture.
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IRIS®
(Intelligent Room Illumination Sensor)
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Automatically detects light volume emitted in a room and
color density, then automatically adjusts the mid-range color tones
required for optimum color reproduction under any lighting
conditions.
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Keystone Correction
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A feature to compensate a
keystone-like distorted picture (caused by projecting to screen either
upward or downward) for a proper rectangle shaped picture by applying a
gradual re-scaling process.
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Lamp
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The light source of the projector.
Typically, a high-pressure mercury lamp.
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LCD
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Acronym for Liquid Crystal
Display. Three LCD panels are used in a LCD projector (each LCD panel is
assigned to each of the three colors.) and each panel contains 786,432
pixels (for XGA) or 480000 pixels (for SVGA) in 0.7" ~ 1.3" diagonal size
area. Each pixel operates as a light shutter individually to control the
amount of light energy that goes through so that a bright part or a dark
part of a picture is produced.
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Mini Plug, Mini Jack
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A typical audio connection for
various audio equipment. Two types (stereo, mono) are available. On
Mitsubishi projectors, it is used for not only audio, but also for a wired
remote control.
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Natural Color matrix, New Natural Color
Matrix
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A unique color processing
technology exclusive to Mitsubishi. Natural Color Matrix makes it possible
to independently adjust the hue of red, green, blue, cyan, magenta, and
yellow without interfering with each other. New Natural Color Matrix
features color saturation (richer color or pale color) adjustment in
addition to the independent hue adjustment feature. Natural Color Matrix
and New Natural Color Matrix are an exclusive feature on Mitsubishi-made
projectors.
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NSH Lamp
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One category of projector lamp by
the particular manufacturer. See " Lamp
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NTSC
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Acronym for National Television
Systems Committee. The television standard for signal processing and
broadcasting (terrestrial broadcasting and satellite broadcasting) in the
U.S.A. and Canada. Also, used in Japan, Taiwan, South Korea, Mexico and
some countries in Latin America. HDTV is excluded.
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PAL
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Acronym for Phase Alternate Line.
The television standard for signal processing and broadcasting used
throughout the majority of Western Europe, South America, Asia, and
Oceania. There are several variations in signal format (such as PAL-B,
PAL-G, PAL-M, etc.) by area. PAL, SECAM and NTSC are not interchangeable
with each other.
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PC
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Acronym for Personal Computer.
Includes Desktop type and Laptop type.
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PC Card (ATA Card)
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A memory card to save computer
picture data. Some Mitsubishi projector models have a feature to directly
project the picture from the PC card without a PC.
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PCGC
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Acronym for Personal Computer
Graphic Control. In projectors, typically an on-screen display in the PC
to command the projector or to communicate with the
projector.
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PCV
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Acronym for PC Viewer. A software
that makes it possible to save picture data from PC to PC card and project
the picture from the PC card by the projector without a PC.
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Picture in Picture (PiP)
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A feature to combine two different
sourced pictures in one frame.
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Projection Distance
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Distance between projector lens
and screen. If screen size is larger, the projection distance becomes
larger also.
Usually, there are two types of projection distance
figures. One is for "wide" end setting of lens zoom and the other one is
for "tele" end setting. Projector should be set at the point between those
two figures when the screen size is fixed. Projection distance for various
sizes of screen can be easily calculated if the projector's "Throw Ratio"
is known (See " Throw Ratio
" for detail.)
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RCA Connection (RCA Plug, RCA Jack)
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Used for Composite Video signal
interface (Also, see " Composite Signal
".) and
Audio signal interface (R and L separate in stereo).
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Resolution
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| VGA (Video Graphic Array)
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640 pixels (W) x 480 pixels (H)
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800 pixels (W) x 600 pixels (H)
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1024 pixels (W) x 768 pixels (H)
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1280 pixels (W) x 1024 pixels (H)
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| Projection resolution
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Resolution of LCD panel (or DMDTM chip) of the
projector (Resolution of the picture actually seen on the
screen).
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Resolution of the computer output
signal.
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If a computer
signal at XGA resolution is fed into an SVGA projector, the projected
picture will be seen at SVGA resolution. Usually, the input signal
(native) from a computer is automatically converted to the projector's own
resolution (In this case, native XGA to projection SVGA). For this
conversion process, re-scaling technology is applied.
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RGB
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Red, Green and Blue. Typically
used to mean "Computer signal" because color signal in computers usually
is processed in red, green and blue elements (not applied to television
signals due to their completely different color signal
system).
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RS-232C Interface
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A communication interface between
projector and PC. Used for remote mouse control, operation by command
panel, trouble shooting, service data transfer, etc..
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S-Video (S-VHS)
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A Video signal formats. Luminance
signal and chroma (color) signal are separated in this format. Due to this
separation, picture is higher than a composite signal. For interface,
S-Video connectors are required.
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SECAM
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Acronym for Systeme En Couleur
Avec Memoire. The television standard for color processing and
broadcasting used in France, the majority of Eastern Europe and some
countries in Africa. Not interchangeable with NTSC or PAL.
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Sharpness
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A user adjustment to change the
projected picture so it is sharper or softer. On computer source,
re-scaling process is applied for desired sharpness while video signal is
directly processed on Video source.
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SHP Lamp
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One category of projector lamp by
the particular manufacturer. See " Lamp
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Smart Hub Networking System
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Allows connectivity to an existing
LAN or the creation of an independent LAN. Files can be created during a
presentation and delivered to a PC for distribution, or existing files can
be called up from a server or from a desktop computer and displayed as
required.
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sRGB
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sRGB (Standard Red, Green, and
Blue) is the color space standard established by the IEC (International
Electrotechnical Commission), and is the basis of color reproduction in
CRT monitors, LCD panels, projectors, printers and other devices.
Originally developed by Microsoft Corporation, Mitsubishi has been named
as a primary partner in developing the testing and evaluation methods for
sRGB Color Profile compliance in front data projectors. Mitsubishi is the
manufacturer of the world’s first sRGB equipped projector.
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SVGA
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See " Resolution
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SXGA
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See " Resolution
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3D Gamma Correction
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3D (three-dimensional) Gamma
Correction technology enables projectors to reproduce images with superior
color and picture quality. With adjustment every 64 steps and full
gray-scale control at gradations of 1%, optimum color management and
recreation of images with colors true to the original is possible.
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Throw Ratio
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Ratio of projection distance to
screen width. Throw ratio is given by the following calculation.
Throw
Ratio = Projection distance / Screen Width
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Mitsubishi X80U to project on 60" (diagonal)
screen.
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Screen Width of 60" (diagonal) screen :
122cm
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Projection Distance of X80U : 236cm (at wide end)
and 304cm (at "tele" end)
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Throw Ratio : 236 / 122 = 1.93(min.) 304 / 122 =
2.49(max.)
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These two figures
are often utilized to design a fixed installation.
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UHP Lamp
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One category of projector lamp by
the particular manufacturer. See " Lamp
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USB
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Acronym for Universal Serial Bus.
For projector operation, USB is used for remote mouse control.
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XGA
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See " Resolution
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Y.CB.CR.
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See " Component Video Signal
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VGA
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See " Resolution
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Y.PB.PR.
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See " Component Video Signal
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Zoom
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A function within the lens to
adjust the projected screen size so it is larger or smaller. This function
also gives you a flexibility of projection distance when you set up the
projector to just-fit to the screen size. Most Mitsubishi projectors have
a built-in zoom lens.
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