Glossary
5
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 is one at
the top of each 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.
Louver:
a 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:
a display board with LEDs, a driver board or logic card, a black plastic housing,
and a module latch assembly. Each module is individually removable from either the
front or the rear of the display.
Module latch:
a latch that stretches across the top of the module and is accessible from
either the front or the rear.
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.
Video Image Processor (VIP):
an interface that drives video to the display while also
dimming, providing gamma and color controls, and displaying test patterns.
