According to one embodiment, a display device includes a plurality of pixels and a bank provided between each adjacent pair of the plurality of pixels, and each of the plurality of pixels includes, on a base, a cathode, an organic EL layer provided on the cathode, a protective layer provided to cover a side surface of the organic EL layer, and an anode provided on the protective layer and in an aperture of the bank, so as to be in contact with the organic EL layer.

A display device includes a sub-electrode layer disposed on the substrate while corresponding to at least a part of the non-display area; and banks disposed on the planarization layer in the display area so as to expose at least a part of the anode and disposed on the sub-electrode layer in the non-display area, in which the bank includes a plurality of bank opening portions disposed in the non-display area so as to expose at least a part of the sub-electrode layer, and in which the sub-electrode layer includes oxygen vacancies in an area in which the sub-electrode layer overlaps the plurality of bank opening portions. Therefore, the display device according to the present disclosure, it is possible to provide the display device capable of implementing excellent reliability by suppressing degradation of the pixel caused by oxygen.

A display panel and a manufacturing method thereof are provided. The display panel includes a substrate, and an electrode layer, an antioxidant metal layer, an organic layer and a cathode layer sequentially disposed on the substrate. The electrode layer includes an auxiliary electrode including stacked first and second auxiliary sub-electrodes, and an edge of the second auxiliary sub-electrode protrudes laterally relative to that of the first auxiliary sub-electrode. The antioxidant metal layer is bonded to a side surface of the first auxiliary sub-electrode and a side of the second auxiliary sub-electrode facing towards the substrate. The organic layer includes a first organic portion on the second auxiliary sub-electrode, and a second organic portion spaced therefrom and on a side of the auxiliary electrode. The cathode layer is disposed on first and second organic portions, and electrically connected to side surfaces of the second auxiliary sub-electrode and the antioxidant metal layer.

An etchant includes: based on a total weight of the etchant, about 1 wt % to about 15 wt % of sulfurized peroxide, about 5 wt % to about 10 wt % of nitric acid, about 20 wt % to about 40 wt % of organic acid, about 0.05 wt % to about 5 wt % of ferric nitrate, about 0.1 wt % to about 5 wt % of ionic sequestrant, and 0.1 wt % to 5 wt % of corrosion inhibitor, wherein a remaining amount is deionized water.

A substrate, a display device including the substrate and a method of manufacturing the substrate are disclosed. The substrate includes: a base substrate; an overcoat layer on the base substrate; and a spacer on a surface of the overcoat layer facing away from the base substrate. The spacer is in direct contact with the surface of the overcoat layer facing away from the base substrate.

Disclosed is an organic light emitting display device. The organic light emitting display device includes a substrate in which at least three pixel areas are defined, a first electrode and a hole transporting layer formed on the substrate, a light-emitting material layer formed on the hole transporting layer in each of the pixel areas, and an electron transporting layer and a second electrode formed on the light-emitting material layer. An optical assistant transporting layer is formed on the light-emitting material layer at a position corresponding to one of the pixel areas, and formed of an electron transporting material. Accordingly, provided can be a high-resolution organic light emitting display device that solves an imbalance of electric charges and has an excellent light output efficiency and an enhanced service life.

Disclosed are an organic light-emitting diode and an organic light-emitting display device including the same. The organic light-emitting diode includes: a first electrode; a second electrode disposed opposite to the first electrode; a light-emitting layer disposed between the first electrode and the second electrode; a hole transport region disposed between the first electrode and the light-emitting layer; and an electron transport region disposed between the light-emitting layer and the second electrode; the hole transport region including at least two layers, and one of the at least two layers is in contact with the first electrode and is a self-crystallizing material-containing layer.

An OLED display element, its manufacturing method and a display device are provided. The OLED display element includes a light-emitting pixel unit. The light-emitting unit includes an anode arranged above a base substrate, a cathode arranged opposite to the anode, and a micro cavity formed between the anode and the cathode. The micro cavity includes an organic light-emitting layer, and the anode includes an ITO layer arranged opposite to the cathode and a metal oxide conductor layer arranged at a side of the ITO layer that is farther away from the cathode than the other side of the ITO layer.

An array substrate, a method for preparing an array substrate, a display panel and a display device are provided in the embodiments of the disclosure. The array substrate comprises a substrate and a plurality of anode layers arranged in an array on the substrate and spaced apart from another; in a range of distance from edges of the plurality of anode layers, thicknesses of the plurality of anode layers are set to increase gradually from central regions to edge regions of the plurality of anode layers.

A manufacturing method of an OLED substrate and a manufacturing method of an OLED device are provided. The manufacturing method of the OLED substrate include steps of providing a base substrate; sequentially forming a first metal layer, a second metal layer, and a third metal layer on the base substrate; forming a pixel definition layer on the second metal layer; and forming a light-emitting layer on the third metal layer. The default water flow rate of the first metal layer and the third metal layer are different from each other.