Abstract: The present invention relates to an OLED pixel compensation circuit for removing a substrate effect. The pixel compensation circuit according to the present invention uses six transistors and two storage batteries to fix both a source voltage and a body voltage of a driving transistor that drives an OLED, thereby having the effects of eliminating errors due to a substrate effect and presenting more accurate pixel compensation results.

Abstract: Disclosed is a method and an apparatus for coating electromagnetic wave shielding films, by which adhesive forces between coating objects and the electromagnetic wave shielding films are strengthened, and the films can be uniformly coated on the coating objects. In the method, surfaces of coating objects are etched, and then electromagnetic wave shielding films are coated on the surfaces of the coating objects. In the apparatus, a cylindrical rotating jig is disposed in a chamber and contains a plurality of coating objects loaded therein. The rotating jig is rotated at a predetermined speed. The rotating jig is put into and drawn out of the chamber. Targets functioning as cathodes are disposed inside and outside of the rotating jig. A controller controls operation of the apparatus.