Patent ID: 9214504
Filing Date: 2015-12-15
Classification: G09G,H01L

Abstract:
1. An organic EL display device comprising: a plurality of pixels each including a pixel driving circuit formed on a substrate, respectively; a current supply line; wherein the pixel driving circuit includes a thin film transistor and a capacitor connected to the thin film transistor, the thin film transistor being connected to the current supply line; a first insulation layer covering the thin film transistor; a first electrode layer provided on the first insulation layer, wherein the first electrode layer is connected to the thin film transistor through a contact hole in the first insulation layer; a second insulation layer is formed on the first insulation layer and the first electrode layer, the second insulation layer being provided with an aperture at the first electrode layer; an organic light emitting layer formed on the second insulation layer and in the aperture and connected to the first electrode layer through the aperture; and a second electrode layer formed on the organic light emitting layer and the second insulation layer, wherein the second insulation layer includes an inner wall at the aperture, the organic light emitting layer being formed on the inner wall of the second insulation layer and at a bottom portion of the aperture, a first edge portion of the second insulation layer is sandwiched between the organic light emitting layer and the first electrode layer, a second edge portion of the second insulation layer is sandwiched between the organic light emitting layer and the first electrode layer, a part of the second insulation layer is formed in the contact hole of the first insulation layer, said part of the second insulation layer including a portion formed in the contact hole and a portion formed about the contact hole between an upper surface of the first insulation film and a lower surface of the organic light emitting layer, a first part of the first electrode layer is formed on an inner wall of the contact hole of the first insulation layer, the first part of the first electrode layer is connected to the part of the second insulation layer connected to a first part of the organic light emitting layer, the first part of the first electrode layer is arranged directly below the part of the second insulation layer, and the part of the second insulation layer is arranged directly below the first part of the organic light emitting layer, the first part of the first electrode layer, the part of the second insulation layer, and the first part of the organic light emitting layer are arranged in this order, the first edge portion of the second insulation layer is sandwiched between the part of the second insulation layer and the organic light emitting layer, and a height of a top surface of the part of the second insulation layer, in the portion of the part of the second insulating layer formed above the contact hole, from the substrate is higher than a height of the first edge portion of the second insulation layer from the substrate, the top surface of the part of the second insulation layer being directly connected to the organic light emitting layer.