Patent ID: 8111969

Claim:
A method for fabricating a light guide member from a light guide member material, the light guide member guiding light received from a light source, and including a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, the method comprising: preparing a mold core; cutting at least one predetermined region from the mold core forming at least one cut-out portion and a remaining mold core portion; forming a first pattern on the remaining mold core portion, the first pattern including at least one of a plurality of projections and grooves extending along a first direction; forming a second pattern on the at least one cut-out portion, with a pitch different than that of the first extruded pattern in the divided mold core; assembling the mold core by combining the at least one cut-out portion and the remaining mold core portion, the first pattern and the second pattern being arranged on a same side of the assembled mold core; and molding the first grooves and the second grooves on a first side of the material for forming the light guide member corresponding to the first and second patterns, respectively, using the assembled mold core.