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7.5 Glossary of Terms
Ter m Meaning
aspect ratio The ratio of the width to the height of a
picture, often expressed as 4-by-3,
4:3, 4u×3, or 1.33:1 (the aspect ratio
of standard television pictures). 16-by-
9 (1.77:1) is the aspect ratio for high-
definition TV.
ballast The electronics part (module) that
powers the lamp, providing high volt-
age to start the lamp and a lower volt-
age for operation.
Bay Cat The name for a Clarity direct-view LCD
display, similar to a Clarity Bobcat, but
with a larger screen (46”) and higher
resolution (1920x1080). Model num-
ber SN-4610-1080
Bobcat The name for any Clarity model begin-
ning SN-4025 or SN-4035. A 40" direct
view LCD display of 1280 × 768 pix-
els.
composite
sync
Sync signals that combine the hori-
zontal and vertical syncs onto one sig-
nal line, separate from the video.
RGBS uses this type.
composite
video
A video distribution system in which all
the video information, is sent on one
wire. Sometimes called C-Video.
cube One display without regard to others
that may be in a wall with it.
See also unit; display.
Clarity Display
Aspect
Ratio
Lion X, UX, XP, UXP,
XL, UXL
Panther UX, UXP
Puma X, XP, UXP
Tigress S, X
Wildcat S, SE
1.33
Lion SX, SXP 1.25
Bobcat 1, 2 1.66
Bay Cat, Margay,
Bengal
1.77
C-Video Composite video; a video distribution
system in which all the video informa-
tion, is sent on one wire.
DA Distribution amplifier; a device that
takes in one input and gives out many
of the same type. DAs are available for
video, computer and digital signals.
display One display unit without regard to oth-
ers that may be in a wall with it.
DLP™ Digital Light Processing, Texas Instru-
ments’ trademarked name for their
optical system using a DMD™ and a
color wheel. Other manufacturers also
use TI’s DMD chips.
DMD™ Digital Micromirror Device, Texas
Instruments’ trademarked name and
patented device for reflecting individ-
ual pixels of light toward a screen.
DVI Digital Video Interface, a standard for
distributing computer pictures in digi-
tal form.
electronics
module
The electronic part that controls
almost everything about the display. It
converts incoming pictures to a form
the LCD can use to display pictures
and provides control through the
remote control and RS232 connec-
tions to other functions, such as turn-
ing lamps on and monitoring fans.
Fast key One of the buttons on the remote con-
trol that takes you directly to a menu
or chain of menus.
H & V sync Horizontal and vertical sync on two
separate lines. The VGA family uses
this type.
key a push button on the remote control
lamp life A lamp life of 5,000 hours means that
for a large group of lamps, after 5,000
hours of use, at least half of them will
still be operation.
LED Light Emitting Diode: a small, low
power lamp used as an indicator,
often red or green, but can be other
colors.
Ter m Meaning