There are two general kinds of LCD displays, Passive Matrix and Active Matrix.
GLLS uses V-cut engraving technology on the acrylic board to guarantee the even distribution of light over the entire surface. To distribute the light uniformly, the pattern is wider when it is closer to the LEDs, and narrower further away. The pattern changes depending on size. However, after seven years of technology development, GLLS has achieved a center brighter than the edges which is the desired result.