Apparatus having negative dot pattern used in machining thin light guide plate

An apparatus for machining a light guide plate, the apparatus comprising:

• a machining table unit on which the light guide plate is to be placed, the machining table unit being movable in a machining direction when the light guide plate is being machined in a state in which the light guide plate is seated on the machining table unit;
• a drive unit disposed over the machining table unit, the drive unit comprising a drive device for providing power to move in a transverse direction in which dot pattern is to be formed in an upper surface of the light guide plate and in a vertical direction and a plurality of drive supports spaced apart from each other at predetermined intervals in the transverse direction of the light guide plate, the drive supports being movable in the transverse direction and the vertical direction in response to an operation of the drive device;
• a plurality of adjustment units disposed over the light guide plate, wherein each of the adjustment units is supported on a respective one of the drive supports such that the respective adjustment unit is movable in the vertical direction;
• a plurality of machining support units disposed over the light guide plate, wherein each of the machining support units is hinged to a respective lower portion of the adjustment units such that the each machining support unit pivots in the transverse direction of the light guide plate;
• and
• a plurality of machining units disposed over the light guide plate, wherein each of the machining units is rotatably disposed on a respective lower portion of the drive supports, and has teeth on an outer circumference thereof, wherein the teeth are configured to machine the light guide plate, each of the machining unit capable of engraving dots while the light guide plate is being carried in the machining direction.