Daktronics Valo Digital Billboard - Manual (Page 47)

Glossary 39
Glossary
Data Distributor: device that routes signal to the display. Display data from the controller passes
through the data distributor before routing to the multi-line controller (MLC) within the display. The
data distributor mounts directly inside the display as a single card, or in a separate enclosure with
other parts.
Lanyard Attachment Ring: a ring found on the back of each module near the latch release on the
back of the module. The lanyard attaches to the ring and prevents the module from falling.
Latch Release: device that holds the module firmly to the display frame. There are two per module,
one on the top and one on the bottom.
Light Emitting Diode (LED): low energy, high intensity lighting unit.
Line Filter: device that removes electromagnetic noise that might interfere with local communication
channels from the power system. Line filters sometimes mount on brackets with power supplies.
Other times they are mounted alone.
Louver: a black plastic shade positioned horizontally above each pixel row. Louvers increase the
contrast level on the display face and direct LED light for easier viewing.
Module: consists of a display board with LEDs, a driver board or logic card, a black plastic housing, a
module latch assembly, and a louver. Each module is individually removable from either the front or
back of the display.
Module Latch: an assembly using a rotating retainer bar to hold the module firmly to the display
frame. There are two per module, one near the top and one near the bottom.
Multi-Line Controller (MLC): a circuit board that passes display data, and can be turned on and off.
For LED displays, a pixel is the smallest block of LEDs that can generate all available colors.
Power Supply: device that converts AC line voltage from the panel board to low DC voltage for
driver boards. One power supply may power multiple modules.
Ribbon Cable: is a cable that runs many wires parallel to each other on a flat plane. These cables in
various lengths are used throughout the display.
Termination Block: an electrical connection point, usually used to connect internal power and signal
wires to wires of the same type coming into the display from an external source.