By definition, the pixel is the “luminous dot” present on every LED device, from the simple alphanumerical Single Line display to FullColor maxi screens. This luminous dot can be formed by 1 or more LEDs depending on dimensions and features of the device.
For example, on a small-size Single Line display, the pixel is formed by 1 single LED while on the king-size model the pixel can be formed by 20 LEDs. In some products, the pixel can be composed by up to 36 LEDs.
Images

1 LED x Pixel

4 LED x Pixel

9 LED x Pixel

16 LED x Pixel