Light guide plate[Light guide plate?:light guide plate] is a transparent acrylic light plate made from pure PMMA resin, on whose bottom face a dot matrix is printed or a line matrix is scratched. The light source is installed on its edges which distributes the light coming from the light source evenly over the whole upper face of the acrylic light guide plate.
The dot matrix is a key component to maximize the uniformity of light, to make backlight slim and to reorient the line or dot light source like fluorescent, LED lamp to the plate light source. If the acrylic would remain purely transparent without any dot matrix, only the part adjacent to the lamp would be lighted up. It's a key technology of dot matrix of light guide plate to make the printed dot matrix evenly distribute the light and to make the luminosity of the area around light source almost equal to that of the area remote from it.
