Glossary – Daktronics Galaxy AF-3500/3550 User Manual
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Glossary 33
Glossary
Cabinet: The metal frame of the display (back, sides, top, and bottom).
Column: A vertical line of pixels.
Controller: The “brains” of the display. The controller receives signal communication from the computer and sends
the information to the modules. Messages and schedules may also be stored on the controller for use when desired.
Display Address: An identification number assigned to each display of a network. The control software uses the
address to locate and communicate with each display. Displays that are on the same network must have different
addresses.
Galaxy®: One of Daktronics’ trademarked names for commercial LED matrix displays.
Light Emitting Diode (LED): A low energy, high intensity lighting element. When grouped together, LEDs produce
the messages that appear on the display.
Louver: Black plastic ledge positioned horizontally above each pixel row. Louvers block sunlight to increase the level
of contrast on the display face.
Mirror: The second display in a two-sided (2V) configuration. The mirror display does not have a controller, but
rather an MLC. It displays an exact copy of the information on the primary display. All signal information to the
mirror is received through an inter-connect cable from the primary display.
Multi-Line Controller (MLC): Used in mirror displays to repeat data from the primary display and to control the
mirror display’s ventilation fans.
Module: Modules are the “building blocks” of the display. Individual module sizes vary depending on the pixel pitch
of the display. Each module is individually removable from the front of the display.
Network: Consists of multiple displays connected to each other. As many as 240 primary displays can exist on one
network.
Picture Element (Pixel): A single LED or cluster of LEDs. The number and color of the LEDs depends on display
application.
Pixel Pitch: The amount of space between the center of two pixels. The pixel pitch is equidistant both vertically and
horizontally.
Primary: The first display in a two-sided (2V) configuration. The communication signal, light sensor, and temperature
sensor are connected to this display. Information is relayed from the primary through an inter-connect cable to the
MLC in the mirror so it shows exactly the same information.
Venus 1500 Software: The software on the control computer used to create messages and send them to displays. The
Venus 1500 software manual is included on the software’s installation disk.