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What is a LED Display?

When RGB color LEDs hit the market in the late 90s, everything changed. LED is now the current leader in technology for digital signage and is advancing at a rate that puts it in direct competition with the pixel density of LCD video walls.

A wall of videos isn’t an easy thing to accomplish and it requires smaller units working together to create a bigger picture. Direct view LED displays are comprised of several smaller LED screens mounted on a flat panel. LED stands for “light-emitting diode” and unlike LCD screens, the LEDs in DV displays produce light themselves. Each LED acts as a tiny bulb that emits color when electrically engaged. Rather than backlighting the images, the LEDs are actually producing them. LED displays originally started out as monochrome and were often used in outdoor digital signage.

Pixel Construction

A modern LED used in video walls is coated with a black resin epoxy. Shades are inserted between the lights to eliminate reflectance and to achieve true black. This greatly improves pixel density and makes LED displays as high of a quality as any LCD on the market.

When installing an LED video wall, it is important to keep in mind the average viewing distance. Since most LED panels will not scale, the number of pixels is your resolution. The closer people are, the finer the pixel pitch needed. Typically, one surface mount device  LED is equal to 1 pixel in a video wall (and on that lies the RGB die). The pixel density is usually calculated by the pitch, which equates to the distance (in mm) between each  LED.

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