BACKGROUND

1. Field

One or more embodiments described herein relate to a display device.

2. Description of the Related Art

Various types of display devices have been developed. One type of display device includes non-pixel area that surrounds a pixel area. The non-pixel area has a driving circuit or wires for supplying power source voltages or driving signals to pixels in the pixel area. The non-pixel area may also include a material for sealing at least the pixel area or a bonding area of an encapsulating layer. The size of the non-pixel area may restrict the size of the screen in the pixel area.

SUMMARY

In accordance with one or more embodiments, a display device includes a substrate including a pixel area with at least a first rounded corner portion and first to third non-pixel areas arranged sequentially along an outer circumference of the pixel area; a plurality of pixels in the pixel area; an internal circuit in the first non-pixel area and having a first end portion adjacent to the first rounded corner portion of the pixel area, the first end portion of the internal circuit rounded in accordance with the first rounded corner portion; and a plurality of routing wires in the third non-pixel area below the pixel area, the routing wires extending to the pixel area via the second non-pixel area and the first non-pixel area, the routing wires including at least a first routing wire connected to the pixel area passing an area of the first end portion of the internal circuit.

The display device may include an encapsulating layer to cover the pixels and the internal circuit, wherein the encapsulating layer includes a first encapsulating layer that covers the pixel area and the first non-pixel area and a second encapsulating layer that covers the first encapsulating layer and having an end portion in the second non-pixel area. The second encapsulating layer may be superimposed on at least the first routing wire on outskirts of the first end portion of the internal circuit.

The internal circuit may include a plurality of stages to sequentially output a control signal. The first routing wire may traverse an area between adjacent ones of the stages and may be connected to the pixels in a first column. The display device may include at least one power source wire on outskirts of the internal circuit. At least one area of the power source wire may be superimposed on the internal circuit. At least one area of the power source wire may be superimposed on the first end portion of the internal circuit.

The internal circuit may include a transistor and the power source wire may include a first conductive layer on a same layer as one electrode of the transistor and a second conductive layer on and electrically connected to the first conductive layer, with one or more insulating layers therebetween. The first conductive layer may be on a same layer as an electrode on an uppermost layer of electrodes of the transistor. The first conductive layer may only be on another area excluding the area superimposed with the internal circuit.

At least one area of the second conductive layer may be superimposed with the first end portion of the internal circuit. A width of the area of the second conductive layer may be superimposed with the first end portion is greater than a width of the rest of the area. The power source wire may branch into at least a first sub power source line and a second sub power source line in an area adjacent to the first end portion of the internal circuit, and the first end portion may be between the first and second sub power source lines.

The first sub power source line may neighbor an outer circumference of the first end portion, and the second sub power source line may neighbor an inner circumference of the first end portion. The power source wire may include a connecting line connecting the first sub power source line and the second sub power source line. The connecting line may traverse an area between a plurality of stages in the internal circuit and may electrically connect the first sub power source line and the second sub power source line.

The connecting line may include a conductive layer on a different layer from a transistor in the internal circuit portion. A sum of widths of the first and second sub power source lines in an area where the first and second sub power source lines face each other, with the first end portion therebetween, may have a width substantially equal to the power source wire in a non-branch area.

In accordance with one or more embodiments, a display device includes a substrate, a plurality of pixels, a driving circuit and at least one power source wire. The substrate includes a pixel area and a non-pixel area. The plurality of pixels are in the pixel area. At least one of the pixels comprises a transistor on the substrate, a first electrode on a first layer on the transistor, a light emission layer on the first electrode and a second electrode on the light emission layer. The transistor has a semiconductor layer, a gate electrode, and source and drain electrodes. The driving circuit is provided in the non-pixel area and configure to drive the pixels. The at least one power source wire is in the non-pixel area, at least a portion of the power source wire is provided between the driving circuit and an edge portion of the display device. The power source wire comprises a first wire on a second layer and a second wire on the first wire and electrically connected to the first wire. The second wire is provided on a third layer between the first layer and the second layer.

The power source wire may overlap the driving circuit. The power source wire may be electrically connected to the second electrode.

