Display apparatus

#1. Field of the Invention

#The present invention relates to the shape of a contact hole provided in a display apparatus, the shape being determined when a transparent conductive oxide (TCO) electrode is connected to wiring (power wiring and/or ground (GND) wiring).

#2. Description of the Related Art

#FIG. 1 is a schematic diagram showing an exemplary configuration of a panel according to a first embodiment of the present invention.

#FIG. 2 shows a contact hole section according to the first embodiment.

#FIG. 3 shows an exemplary vertical structure of the contact hole section according to the first embodiment.

#The configuration of a display panel will now be described in accordance with a first embodiment of the present invention with reference to FIG. 1. First, a thin film transistor (TFT) and a planarization film are provided on a substrate. Then, a transparent conductive oxide (TCO) electrode 124 (first electrode including an indium tin oxide (ITO), etc.) provided on the light extraction side and a second electrode (including aluminum (Al), for example) are provided on the planarization film to sandwich a light emitting layer (not shown) between the TCO electrode 124 and the second electrode. The light emitting layer may be, for example, an organic film which emits light when an electrical potential is applied across the film.

#Next, a contact hole 1 (110 and 113) and a contact hole 2 (111 and 114) are provided in a current path extending from the TCO electrode 124 to a ground (GND) end 116 and a PAD section 148 (shown in FIG. 3).

#First, a current flowing from the TCO electrode 124 (first electrode) with a high resistance flows into the contact hole 1 which is close to a display region 100 of the TCO electrode 124. Then, a residual current which did not flow into the contact hole 1, (e.g., a current flowing between holes 110 and 113) flows into the contact hole 2. Here, the distance between the contact hole 2 and the display region 100 is longer than that between the contact hole 1 and the display region 100, and the residual current flows into the contact hole 2.