Patent ID: 8764427

Claim:
An apparatus for forming a pattern using a laser, the apparatus comprising: a pattern storing unit for storing data on light guide patterns of a discontinuous straight line shape to be formed in a light guide panel; a controller for reading out position signals of each of the light guide patterns to be formed in the light guide panel, from the pattern storing unit, transmitting the read-out position signals to an X-Y driver and simultaneously, and transmitting a switching signal, which is generated on the basis of length information of each of the light guide patterns, to a laser oscillating unit; the laser oscillating unit for outputting a laser beam synchronized with a movement of a header unit, on the basis of the switching signal received from the controller; the X-Y driver for moving the header unit and a stage, on the basis of the position signals received from the controller; the header unit for moving along a first guide rail in the left and right direction of the light guide panel by way of the X-Y driver, and forming the light guide patterns in the light guide panel by vertically downwardly reflecting and concentrating the laser beam output from the laser oscillating unit; and the stage for moving along a fixed second guide rail in the front and rear direction of the light guide panel by way of the X-Y driver, and fixing two or more light guide panels thereon, wherein, by differentially controlling length of each of the light guide patterns formed in each of the two or more light guide panels according to the data on light guide patterns and change of characteristics of the laser beams from the laser oscillating unit with difference of distances between the laser oscillating unit and the said each of the light guide patterns fixed to the stage, the controller is configured to make a luminance characteristic of the light guide panel as a surface light source device to be uniform across the said each of the two or more light guide panels under a luminance condition for the surface light source device given by the data on light guide patterns in the pattern storing unit.