Patent ID: 7588365
Filing Date: 2009-09-15
Classification: G02B,Y10T

Abstract:
1. A method of producing a light guide plate comprising a light exiting surface and a light reflecting surface opposite to the light exiting surface, the light reflecting surface having a plurality of light reflective dots formed thereon in a scattered fashion, the method comprising: (a) producing a first prototype of the light guide plate in which primary dots are formed on a light reflecting surface of the first prototype; (b) examining optical characteristics of the first prototype relating to light exiting from a light exiting surface of the first prototype; (c) producing a second prototype of the light guide plate when the examined first prototype exhibits optical characteristics which are not satisfactory, the second prototype comprising, on a light reflecting surface thereof, primary dots that are the same as the primary dots of the first prototype in size and distribution, and secondary dots having a smaller diameter and height than the primary dots and arranged between the primary dots in at least part of the light reflecting surface to improve the optical characteristics of the second prototype; and (d) repeating steps (b) and (c) until a prototype is produced which exhibits satisfactory optical characteristics, wherein the second prototype is examined in step (b).