|
|
|
|
 |
| |
| |
|
|
|
|
 |
|
|
|
| |
|
|
|
|
 |
Active Matrix TFT
|
The most common type
of LCD used in most LCD projection panels and projectors. A display in which
each pixel is driven by a thin film transistor allowing a larger viewing angle,
quicker response time and more color saturation. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Amorphous
|
It is a
non-crystalline silicon. In amorphous TFTs, the electron mobility is low. This
means the transistor must be large, making it difficult to pack pixels densely
in a panel. Thus, amorphous TFTs are most suitable for relatively large LCD
panels and single panel projector. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
ANSI
|
American
National Standards Institute. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
ANSI Lumen
|
The standard of
measuring brightness of a display device made by American National Standards
Institute. The measurement represents the average value of 9 points on the
projected screen image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Aspect Ratio
|
The ratio between the
width and the height of a frame or a screen. The aspect ratio for NTSC video is
4:3; HDTV is 16:9. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Aperture Ratio
|
Transmission rate of
light passing through pixels contained within a TFT. The higher the number the
brighter the image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Audio in (Stereo Input)
|
The jack or jacks
(typically standard RCA jacks) to plug in sound coming from a computer or video
source. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Audio out (Stereo Out)
|
The jack or jacks to
hook up external (powered) speakers or a PA system. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Bandwidth
|
Transmission capacity
of a computer or communications channel, the greater the bandwidth, the more
information or picture detail will be displayed. In video system, this value is
expressed in megahertz (MHz). |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Brightness
|
The amount of light
emitting from a display or projection device. The brightness of projector is
measured by ANSI lumens. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Component Video
|
The original elements
of a color picture, including the red, green, blue, and sync information.
Regarded as visually superior to composite video. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Composite Video
|
The complete color
television picture information including luminance, chrominance, blanking, and
sync signals encoded into one signal. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Compression Mode
|
A method to reduce
the resolution of the display image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Contrast Ratio
|
The ratio of the
brightest and darkest images a display can reproduce. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Deinterlacer
|
Converting from
interlaced to progressive scan. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Diagonal
|
A
measurement of display size. It measures from one corner to the opposite
corner. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Dichroic Mirror
|
To
separate the light into Red, Green, and Blue three primary colors for the LCD
panels. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Dichroic Prism
|
To
combine the Red, Green, and Blue lights for the projection display. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
DLP
|
"Digital
Light Processing," reflective display technology developed by Texas
Instruments, using small digital-controlled mirrors. Light passes through a
color filter and is sent to the DLP chip, which arranges the RGB colors into a
picture projected onto a screen. Also known as DMD. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
DMD
|
"Digital
Micro-Mirror Device," which contains millions of tiny mirrors by using digital
control to move these mirrors to reflect the light and create the image on a
projection screen. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Dye
Filter Optics
|
Dye filter optics are
where each pixel on an LCD has a red, green and blue color filter that adjusts
the amount of each of these colors to produce an accurate image on the screen. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Frequency
|
Defines number of
cycles during a time period. Hertz (Hz) used to express the frequency of an
electrical signal. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Field Lens
|
To
collimate the illumination of LCD panels and to match it with projection lens. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Front Surface Mirror
|
It is the same as the
mirror function for folding the illumination lights. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Gray Scale
|
Special monochrome
monitor capable of displaying different shades of gray. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Halogen Lamp
|
Low color
temperature (yellow light). The lifetime is short but the light output is
steady. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
HDTV
|
An analog TV signal
in the U.S. has 525 scan lines for the image, and each image is refreshed every
30th of a second (half of the scan lines are painted every 60th of a second in
what is called an interlaced display). 480 of 525 scan lines are used to hold
the picture. We can also call it 480i. The formats used in HDTV are as
followed: 480i - 640 x 480 pixels interlaced
�� 480p - 640 x 480 pixels progressive
�� 720p - 640 x 480 pixels progressive
�� 1080p - 1920 x 1080 pixels progressive |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Hertz (Hz)
|
Cycles
per second. It is a measurement of frequency. 1 Hz=1 cycle per second. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Hot Mirror
|
Rejects the unneeded
infrared rays that will heat the LCD panel and let visible light pass through. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Input /Output (I/O)
|
The
process of transferring data to and from a computer-controlled system using
communication channels, operator interface devices, data acquisition devices,
or control interfaces. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Integrator
Lens
|
To
make the display image more uniform. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Interlaced
|
Every
other line is scanned during each total vertical (full) screen refresh. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Jitter
|
A rapid, small shift
in image positions. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Keystone
|
A type
of distortion in which the displayed image is smaller at Top (or Bottom) of the
screen than at the Bottom (or Top). Normally it is caused by improper
projector-to-screen angle. Named for its similarity in shape to the keystone
used in constructing an arch. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Keystone Correction
|
A
device that will correct an image that has a keystone effect (wide-top and
narrow-bottom problem). |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
LCD
|
Liquid
Crystal Display. Liquid crystals are activated by electric fields to produce
the display image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Line Doubler
|
A device intended to
synthesize a picture with twice as many scan lines with or without interlacing
in the final result. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Loop Through
|
An input
signal that bypassed most of the internal circuitry and loops through the
signal; is buffered and sent back out to make it available to be displayed by
another display device. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Lumen
|
It is a measurement
of illumination on a screen or other surface. 1 Lumen/m2 = 1 Foot-candle. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Lux
|
It is a Metric
measurement of light quantity. Taken from the reflection off the object
illuminated. 1 Foot-candles = 10.76 lux. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Metal Halide Lamp
|
The
lamp has high color temperature (white light). The lifetime is about 1000
hours. Type of lamp used as a light source in audio/visual equipment.
Brightness steadily decreases during its life span. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
MSRP
|
Manufacture's
Suggested Retail Price. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
NTSC
|
"National Television
Standards Committee". The television standard for the US, administered by the
Federal Communication Committee (FCC). The number of scanning lines in the
luminance signal (Y) is set at 525, and the field frequency is 60 Hz. 30 frames
are transmitted per second. Set in 1953. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
OSD
|
"On
Screen Display," menu displayed on the screen with different options that users
could easily use to adjust the display's picture. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Output Fresnel Lens
|
To
coordinate with illumination system, the image from arc of lamp will be
projected to projection lens.
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
PAL
|
"Phase Alternative by
Line". The PAL system uses 625 scanning lines and a field frequency of 50 Hz.,
25 frames are transmitted per second. The standard color system used throughout
England, Western Europe, Scandinavia, South Africa and Australia. PAL-M is the
standard system in Brazil. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Panning
|
When you display a
higher resolution image by moving your picture or image left, right, up, or
down to see parts not shown in the display area. Passive Matrix? A display by
which each row and column are overlapped or addressed in turn.? Passive matrix
has a smaller viewing angle, slower response time and pseudo color compared to
active matrix. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Pixel
|
A
unique position on a display that consists of a single dot or group of three
dots (red, green and blue). Total display pixels are usually expressed in
horizontal x vertical dimension (e.g., 640x480). |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Polysilicon
|
Type of TFT material
for high-density displays. Has greater electron mobility than other common TFT
materials. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Polysilicon TFT
|
It is a type of LCD
technology that allows more light at high temperatures through the LCD. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Progressive Scan
|
Progressive scan
means drawing the odd and even scan lines in order without interlacing.
Progressive scan by itself does not improve resolution. We still have the same
480 (for NTSC) illuminated scan lines' worth of picture detail. One reason for
progressive scan is to reduce flicker. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Pseudo Stereo
|
Creates a stereo like
sound from a mono source in the EzPro projector. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Reflector
|
The spherical
reflector is used to reflect the divergent visible light beams from the lamp. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Refresh Rate
|
It is the number of
times per second, during which a displayed image is regenerated, expressed in
Hz. A low vertical refresh rate produces visible flicker. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Relay Lens
|
To relay the blue
light to the LCD panel so that the illumination condition of it could be the
same as the other two color. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Resolution
|
The
number of pixels per image area expressed by Horizontal number of pixels x
Vertical number of pixels (e.g., 640x480). The more pixels the display systems
can address the higher-quality image with more detail.
|
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Response Time
|
The time it takes for
a pixel to turn on and off. Response time is a good indication of how fast
motion such as video or computer animation will appear on the projected image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
RGB
|
"Red, Green, Blue,"
primary colors used to make color spectrum. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
SECAM
|
Sequential Couleur
Avec Memorie (sequential color with memory). The color television standard
developed in France, which is used mostly in France and Eastern European
countries. The system uses 625 scanning lines and a field frequency of 50 Hz.
25 frames are transmitted per second. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Serial Port
|
A data I/O port on
the computer enabling other devices or computers to link with the computer.
Also referred to as RS-232C or COM port. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Sharpness
|
The apparent image
resolution. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Spatial Stereo
|
Surround sound
quality mode in the EzPro projector. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
SVGA Resolution
|
"Super Video Graphics
Array" which represents 800 x 600 pixels. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
S-Video
|
A video signal that
separates luminance (Y) and chrominance (C) signals. Generic name is Y/C,
applied to S-VHS or Beta ED. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
SXGA
|
"Super
Extra Graphics Array" represents 1280 x 1024 pixels
|
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Sync
|
The synchronization
or timing signals of a video signal that ensure accurate picture scanning in
both the horizontal and vertical planes. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
TFT
|
"Thin Film
Transistor." Usually refers to an active matrix display in which each pixel is
driven by a thin film transistor deposited on the glass. Provides the best
contrast and speed. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Throw Distance
|
Length of
the projection beam needed for a projector to produce image of a particular
size. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Throw Ratio
|
It represents the
ratio between projection distance to the width of projected image. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Transmitivity
|
The
percent of the light that is transmitted off the LCD panel.
|
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
TSTN
|
"Triple Super Twist
Nematic". It is a technology used to make Active Matrix LCD panels wherein each
pixel has its own transistor switch |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
UHP lamp
|
Ultra High
Performance projector lamp proved up to three times longer lamp life than
traditional metal halide bulb. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
VESA
|
"Video Electronics
Standards Association". A non-profit group of companies organized to define and
improve computer graphics standards. It set the standardized refresh rate of
72Hz for SVGA (800x600) and VGA (640x480). |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
VESA Standard
|
A set of display
specifications agreed upon by the VESA organization, usually referred to
resolution and vertical refresh rate. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
VGA Resolution
|
"Video Graphics
Array" represents 640x480 pixels. |
|
| |
|
|
|
|
|
|
|
| |
|
|
|
|
Viewing Angle
|
The
angle, looking from the left, right, above and below the display, over which a
display can be seen. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Wide Angle Lens
|
A lens that will
project a larger image on a screen at a closer distance than a standard lens
will project. |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
XGA Resolution
|
"Extended Graphics
Array" represents 1024 x 768 pixels |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
Zoom Lens
|
The lens allows the
user to make his display images smaller or larger. |
|
| |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| |
|
|
