According to one embodiment, a manufacturing method of a display device includes forming a first conductive oxide layer, forming a first metal layer at a first pressure, forming a second metal layer at a second pressure, forming a second conductive oxide layer, forming a resist having a predetermined shape, etching the second conductive oxide layer using the resist as a mask, retracting an end portion of the second metal layer relative to an end portion of the second conductive oxide layer and an edge of a lower surface of the first metal layer by etching the second metal layer and the first metal layer using the resist as a mask, etching the first conductive oxide layer using the resist as a mask, and removing the resist.

A display panel includes a circuit layer and a display element layer that includes light emitting elements emitting white light, wherein the light emitting elements each include a first electrode, an optical auxiliary layer on the first electrode, a conductive layer on the optical auxiliary layer, a hole transport region on the conductive layer, a first light emitting layer on the hole transport region and emitting first light, a light emitting auxiliary unit on the first light emitting layer, a second light emitting layer on the light emitting auxiliary unit and generating second light, a third light emitting layer either between the first light emitting layer and the light emitting auxiliary unit or between the light emitting auxiliary unit and the second light emitting layer and generating third light, an electron transport region on the second light emitting layer, and a second electrode on the electron transport region.

A display device includes a substrate, a pixel circuit layer disposed on the substrate and including at least one thin film transistor, and a pixel electrode disposed on the pixel circuit layer and electrically connected to the at least one thin film transistor, wherein the pixel electrode includes a lower layer including aluminum, an intermediate layer disposed on the lower layer and including a tungsten oxide, and an upper layer disposed on the intermediate layer and including a transparent conductive oxide.

A display panel is provided, including: a substrate; a first planarization layer disposed on a side of the substrate, wherein a first via hole is defined in the first planarization layer; a first ITO layer disposed on a side of the first planarization layer away from the substrate; and an anode disposed on a side of the first ITO layer away from the first planarization layer. Wherein, a first groove is defined in the first ITO layer to make a part of the anode be disposed in the first groove, and a projection of the first groove on the substrate at least partially overlaps with a projection of the first via hole on the substrate.

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.

Discussed is an electroluminescence display apparatus for preventing the performance, efficiency, and lifetime of a device from being reduced. The electroluminescence display apparatus includes a substrate including an active area including a plurality of pixels, a circuit element layer disposed on the substrate, a first electrode disposed on the circuit element layer, an auxiliary electrode disposed on the circuit element layer and spaced apart from the first electrode, a first light emitting layer disposed on the first electrode, a buffer layer disposed on the first light emitting layer, a second light emitting layer disposed on the buffer layer and the auxiliary electrode, and a second electrode disposed on the second light emitting layer. In the electroluminescence display apparatus, since the buffer layer is formed on the first light emitting layer through an inkjet process, the buffer layer can be provided on only the first light emitting layer, and thus, the buffer layer can be formed of an organic material, thereby enhancing the device performance of a blue pixel.

An organic light emitting display device includes a reflective electrode in a pixel region on a substrate and including a concave portion defining a concave furrow, a first filling pattern filling the concave furrow, a first electrode on the first filling pattern and on a portion of the reflective electrode around the first filling pattern, an organic light emitting layer on the first electrode, and a second electrode on the organic light emitting layer.

Provided is a light emitting display apparatus including a first substrate, a first electrode on the first substrate, a bank layer having an opening exposing a portion of the first electrode layer, a bank recess depressed on the bank layer, a second electrode layer on the first electrode layer and the bank layer, and a cover layer covering a lower surface and an inner side surface of the bank recess.

A display device includes: a first pixel electrode disposed in a first emission area on a substrate and formed as multiple layers, an insulating layer covering an edge of the first pixel electrode, a first light emitting layer disposed on the first pixel electrode and the insulating layer, a first common electrode disposed on the first light emitting layer, a bank disposed on the insulating layer and surrounding the first emission area, and a first thin-film pattern disposed on the insulating layer and the bank in an adjacent area to the first emission area. An uppermost layer of the first pixel electrode and the first thin-film pattern include the same material.

The present disclosure relates to a display panel and a display device, and more specifically, to a display panel and a display device that include: a first optical area allowing light to be transmitted; and a normal area included in a display area and located outside of the first optical area, the first optical area comprising: a first anode electrode of a first light emitting element; a first insulating layer including a concave portion exposing at least a portion of an upper surface of the first anode electrode; a light path changing element disposed on a portion of an upper surface of the insulating layer and a side surface of the concave portion; and a bank exposing a portion of the light path changing element disposed on the upper surface of the insulating layer and exposing a portion of the upper surface of the first anode electrode, and are capable of improving light extraction efficiency.