Mobile LED signs are amazing pieces of technology. They are capable of showing text, images, animations and video visible from far away and under harsh outdoor conditions. Despite this, all LEDs have limits when it comes to the amount of detail they can display.
The reason for this limitation has to do with the number of pixels, or points of light, that make up the display. Each pixel is controlled as either on or off – and in some mobile LED signs, each pixel can produce different levels of light output. The difference in light output is what creates a three dimensional image on the display itself. Text messages transmitted directly onto a mobile LED sign are typically using pixels that are either on or off to make up each character in the message itself.
Pixels are arranged in rows that go across the length of the display, and columns that go up/down the height of the display. This forms the pixel matrix, typically written as height by width. For example, a 32×128 pixel display is 32 pixels high and 128 pixels wide, for a total of 4096 pixels.
Commonly, only display height in pixels is used for comparison purposes. This is because the height is typically smaller than the width, and is therefore more of a deciding factor for display capabilities. LEDs are typically presented longer rather than taller so that the user has the option to include text messages from left to right on the display.
This article comes from stewartsigns edit released