Patent ID: 8043547
Filing Date: 2011-10-25
Classification: G02B,Y10T

Abstract:
1. A method for forming a groove pattern in a light-guiding plate of an LCD device by using a tool unit having a plurality of tools, which comprises: fixing the light-guiding plate by a holder having a vacuum structure bottom for separating a stamper from the light-guiding plate; moving the plurality of tools of the tool unit downward by maintaining a predetermined pressure, wherein the downward the plurality of tools moves a piston inside a cylinder downward by using the pressure from the compressor, thereby moving the plurality of tools provided at the lower side of a head downward; moving the plurality of tools of the tool unit upward by maintaining a predetermined pressure, wherein the upward the plurality of tools moves the piston inside the cylinder upward by exhausting the pressure inside the cylinder, thereby moving the plurality of tools provided at the lower side of the head upward; forming a plurality of groove patterns in a surface of the light-guiding plate by applying heat and pressure to the plurality of tools of the tool unit and pressing the surface of the light-guiding plate with the plurality of tools of the tool unit and simultaneously, cutting the light-guiding plate by using a heating nipper surrounding both sides of the light-guiding plate and the stamper, wherein the cutting the light-guiding plate step occurs when the plurality of groove patterns are formed in the surface of an uncut light-guiding plate and the light-guiding plate is cut according to a desired size simultaneously, wherein the heating nipper surrounding both sides of the heating plate and the stamper is heated by the heating plate, and the light-guiding plate is cut using the heating nipper heated by the heating plate and the stamper, and wherein the plurality of tools are formed at the lower side of the stamper at fixed intervals, and each of the tools includes a rectangular or round body and a pyramid-shaped scratch part disposed under the body.