The LED dot matrix or LED display panel, as it is also known, is one of the best methods of displaying media in the world. It’s a refined version of the superseded luminous filament lamp display. A good example of the use of LED display panels is the rolling advertisements seen in shop windows, or the information signs at train stations.
LED displays consume the least amount of energy leading to lower cost of operations.
Advantages include::
* Bright and colourful
* Easily expanded
* Durable and withstands any climate conditions
* Reasonable cost of installation
* Used in small displays to produce very clear text
The tiny displays referred to here include three to six foot long displays that show arrival data on subways and at bus stops, “special offer” and “upcoming event” messages in stores and at recreational venues, and other similar displays.
Older LED matrix displays appeared only in red. Programmers feed info to the display using a keypad that is directly wired into the display unit.
Modern LED displays are available in two or three LED colours. They do not depend on a keypad to program the display. This information can be sent from a central server. This server transmits info to displays stationed some distance away at the same time. Multiple messages display randomly as the microprocessor translates info and displays the desired effects like flashing text. It’s feasible to intermix a message with local weather details, the current time and similar information.
Full colour video displays is also possible using a LED display, using multi-color LEDs. It is capable of displaying 16 million colors by changing the brightness of the three colours in each pixel. Given a LED matrix display with a fast microprocessor, it can produce moving video with full color.
Large RGB displays are common in sports arenas and other big out of doors spaces. During such examples, live video can be shown of the event taking place, giving a clear view to the spectators.
Embedded Adventures is a great place to find out about electronics, and also help you with your new project. There you can find useful modules such as a alphanumeric LED display, or a LED display panel.
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