Organic electroluminescent display device with separately connected signal lines and power lines
A display device includes a TFT-OLED (thin-film transistor—organic light emitting diode) array formed on a substrate and a signal line directly coupled to the substrate and a power line separately coupled to a frame that is joined to the substrate. The signal line is formed on a surface of a circuit board that is joined to the surface of the substrate including the TFT-OLED array, through an anisotropic conductive film. The power line is an electrical cable joined to the frame. When the frame is coupled to the substrate to form the display device, the signal line is peripherally disposed from the OLED power line. The display device can advantageously include a TFT-OLED array of increased dimension because the separately connected OLED power line can accommodate high currents needed for large TFT-OLED arrays without damaging the signal line or the anisotropic conductive film.
1. A method for forming a display device of organic light emitting diodes, comprising:
providing a panel with a pixel array thereon and surrounded by a peripheral region, at least a pixel of said pixel array comprising an organic light emitting diode and a thin film transistor;
electrically coupling a signal line formed on a surface, to said pixel array by physically joining said signal line and said surface to said panel using anisotropic conductive film at a first peripheral location;
electrically coupling a power line to said pixel array by physically joining said power line to said panel using anisotropic conductive film at a second peripheral location, said power line comprising an insulated electrical cable; and
providing a frame and joining said frame to said panel,
wherein said first peripheral location is spaced from said second peripheral location by an angle of at least 60° with respect to a geometrical center of said panel.