Daktronics NPN-4100 Series, Manual

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Glossary
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3 Glossary
Lanyard attachment ring: a ring found on the back of each module. The lanyard
attaches to the ring to keep the module from falling to the ground.
Latch release: a device that holds the module firmly to the display frame. There are four
latch devices per module.
Light emitting diode (LED): a low energy, high intensity lighting unit.
Line filter: a device that removes electromagnetic noise from the power system to
avoid interference with local communications channels. Line filters sometimes mount on
brackets with power supplies. Other times they may mount alone on a bracket.
Mask: a plastic grid on the 2.5 mm module that increases contrast and helps protect the
LEDs from damage.
Module: multiple LED tiles magnetically attached to a die-cast aluminum housing. The
housing has steel plates that attach to magnets in the panel. The logic card connects to
each LED tile via ribbon cable. Modules with the housing, LED tiles, and logic card can
be removed from the front of the panel with a Daktronics-specific module removal tool.
Pixel: the smallest single point of light on a display that can be turned on and off. For
LED displays, a pixel is the smallest block of light emitting devices that can generate all
available colors.
Power supply: a device that converts AC line voltage from the termination panel to
low DC voltage for one or more module driver boards. One power supply may power
multiple modules.
ProLink Router (PLR): a display interface board that passes display data from the control
system to modules and other PLRs. The ratio of PLRs to modules varies with display
application.
Termination block: an electrical point usually used to connect internal power and signal
wires to wires of the same type coming into the display from an external source.
Tile: an LED display board. There are six LED tiles per module. LED tiles can be removed
from the front of the housing with a Daktronics-specific LED tile removal tool.
Video Image Processor (VIP): an interface that drives video to the display while also
dimming, providing gamma and color controls, and displaying test patterns.