Abbreviation of Surface Mount Device (components mounted on the surface). This is one of the production technologies of LEDs and other electronic components. It is characterized by a higher degree of miniaturization, compared to the old TH technology. It is used for the displays in which the distance between the two pixels, are 6 mm or less.


Abbreviation of Red Green Blue (red, green, blue). Any color that the human eye can see, can be produced by a suitable combination of these three colors. Therefore, the pixel color display actually consists three LED components: red, green and blue.


Display can show the text, which consists letters, numbers, punctuation marks (dot, comma, etc…) and other symbols. Instead of the word „symbol“, it is a common use of the word „character“. Therefore, the character may be a letters, numbers, and the similar. Empty space between the words is also counted as one character. For example, the next „This is an example“ consists 13 characters.


Resolution determines the format and presentation capability of the display. Display resolution of 120 x 8 is used exclusively for the text. On the other hand, the display resolution of 128 x 64 can display simple images. Also the higher the resolution, the better the display presentation options. When the display is intended for text presentation, vertical resolution (usually 8 or 16 pixels) determines the height of the letters. With the display, which has a vertical resolution of 16 pixels, you can present two lines of text where the upper 8 pixels used for the first, and the lower 8 for the second line of text. Horizontal resolutions determines how many characters can be printed on one line of text, so that horizontal display resolution of 128 pixels can display twice as many characters, comparing with the display resolution 64 pixels.


The resolution indicates the number of pixels on the display. Most often it is expressed as the number of pixels vertically times the number of pixels horizontally. For example, the display resolution of 8 x 120 pixels means 120 pixels horizontally and 8 vertically, for a total of 960 pixels (8 times 120).


The distance between points, that are usually expressed in millimeters, determines the optimal distance between viewer and display. If the distance between two points is smaller, it menas that the observer might be closer to the display. For example, if the distance between points is 6 mm, that display can be seen from a closer range. On the other hand, if the distance is up to 30 mm this means that the image on the display normally can be seen only at large distances (displays for stadiums). If you are looking for a display for smaller rooms, you will choose a smaller distance between the points. If you are looking for a display for large spaces (such as hallways) or display that will be placed outside then you will choose display with larger distances between points. Examples of distances between points and displays application: 6.2 mm – Display for smaller spaces. 10 – 12 mm – Display for halls and busese. 15 mm – Display for traffic signs. 20 mm – Display billboards. 30 mm – Stadium display.


The same as cd/m2 (see: cd /m2)


Reads like a „milicandela“ or the thousandth part of a “candela” (unit of brightness). This is a common measure of brightness for LED components and shows how much light has been emitted from a source (see also: cd/m2).


The brightness of the display is a photometric measure of the density of illumination intensity in a given direction. This quantity describes the amount of light that passes through or emitted from a particular area and it is within a certain angle of view. It is expressed in candelas per square meter (see: cd/m2). Displays for outdoor use must have a brightness of at least 5000 cd/m2 to be visible in daylight.


A pixel is actually a point in the display. For monochrome displays one item is a one LED component. For color displays one pixel is actually composed of three LED components: red, blue and green. Different brightness of these three components, gives different color. When all three components shining with maximum intensity, white color is obligated.


LED stands for Light Emitting Diode (light emitting diode). It is an electronic component which emitts light when a current fails through it. The color of the LED components depends of the material used for LED production. Standard colors are: white, yellow, amber, orange, red, green and blue.

WHAT IS cd/m2?

Reads like a „candela per square meter.“ This is a physical unit which means the brightness of the display. Equivalent unit 1 NIT is used in the United States. 1 cd/m2 is the same as the NIT.

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