Patent ID: 9612385
Date: 2017-04-04
CPC Classifications: G02B,Y10T

Claim:
1. A method for making a light guide plate comprising: providing a test plate and a light source, the test plate comprising a base and a plurality of first pattern-dots, the base comprising a first bottom surface, a first light output surface opposite to the first bottom surface, and a first light incident surface interconnected between the first bottom surface and the first light output surface, the first pattern-dots arranged on the first bottom surface in a matrix and equally divided into a number of blocks, intersecting surfaces between the first pattern-dots and the first bottom surface having the same radius r activating the light source and detecting a luminous flux φ calculating an average luminous flux φ calculating the radius r providing a substrate, the substrate having the same structure as the base and divided into the same number of blocks according to the same principle as the test plate; and forming a number of second pattern-dots having the same arrangement as the first pattern-dots and having radius of r