A display device includes a substrate including a pixel area and a non-pixel area adjacent to the pixel area, a planarization layer disposed on the substrate and including a plurality of protrusions each having a planar shape surrounding a center of the pixel area, a pixel electrode disposed on the planarization layer and overlapping the pixel area, a pixel defining layer disposed on the planarization layer, overlapping the non-pixel area, and exposing a portion of the pixel electrode, a lower light emitting layer disposed on the pixel electrode, a charge generation layer disposed on the lower light emitting layer, and an upper light emitting layer disposed on the charge generation layer.

A high-resolution or high-definition display device is provided. The display device includes a first light-emitting device and a second light-emitting device. The first light-emitting device includes a first pixel electrode, a first hole-injection layer, a first hole-transport layer, a first light-emitting layer, a first electron-transport layer, a second electron-transport layer, and a common electrode that are stacked in this order. The second light-emitting device includes a second pixel electrode, a second hole-injection layer, a second hole-transport layer, a second light-emitting layer, a third electron-transport layer, a second electron-transport layer, and a common electrode that are stacked in this order. The first light-emitting device and the second light-emitting device have a function of emitting light of different colors from each other. The second electron-transport layer covers at least a side surface of the first pixel electrode, a side surface of the second pixel electrode, a side surface of the first light-emitting layer, and a side surface of the second light-emitting layer.

Disclosed is a light emitting display device configured such that the construction of an electron blocking unit located adjacent to an emission layer is differently applied to subpixels having different turn-on voltages, thereby preventing current leakage and reducing power consumption, thereby improving efficiency and visual sensation of the display device.

A display device includes a substrate, first electrodes disposed on the substrate, a pixel defining film covering edges of the first electrodes, a spacer disposed on the pixel defining film and disposed between the first electrodes, an organic layer disposed on the first electrodes, the pixel defining film, and the spacer; and a second electrode disposed on the organic layer. The organic layer includes a first common layer and a second common layer continuously disposed on the first electrodes, and the first common layer, the second common layer, and the second electrode do not overlap the spacer.

The present invention relates to an active-matrix OLED display, comprising a plurality of OLED pixels, wherein each pixel itself comprises a stack of organic layers and each layer of the stack of organic layers can form a common semiconductor layer, whereinat least a first OLED pixel and a second OLED pixel comprisingan anode layer, a common cathode layer, at least one emission layer, which is optional a common emission layer, at least a stack of organic layers.

A display device includes a pixel electrode, a pixel defining layer including an opening extending to a portion of the pixel electrode, a first auxiliary electrode on the portion of the pixel electrode to which the opening extends, a second auxiliary electrode on the first auxiliary electrode, an intermediate layer on the pixel defining layer and the second auxiliary electrode, and a common electrode on the intermediate layer. A side surface of the first auxiliary electrode is positioned inward of a side surface of the second auxiliary electrode within the opening of the pixel defining layer to form an undercut shape. A hole injection layer of the intermediate layer includes a first portion on a side surface of the pixel defining layer defining the opening of the pixel defining layer, and a second portion disconnected from the first portion and on the second auxiliary electrode.

A light-emitting device with a high resolution and favorable characteristics manufactured by a photolithography method is provided. The light-emitting apparatus includes first and second light-emitting devices. The first and second light-emitting devices are adjacent to each other. The first light-emitting device includes a first EL layer A and a second EL layer. The second light-emitting device includes a first EL layer B and the second EL layer. The first EL layer A and the first EL layer B are independent of each other. The second EL layer is shared by the first and second light-emitting devices. An end surface of the first EL layer A on the first EL layer B side and an end surface of the first EL layer B on the first EL layer A side face each other. The first EL layer A includes a light-emitting layer. The light-emitting layer includes a light-emitting material, first and second organic compounds. The first organic compound is an organic compound having an electron-transport property. The second organic compound is an organic compound having a hole-transport property.

An embodiment of the present disclosure provides a display substrate comprising a substrate comprising a display area and a peripheral area; a plurality of sub-pixels spaced apart by a pixel defining layer on the substrate and located in the display area, wherein the sub-pixels comprise: a first electrode; a first light-emitting layer; and a charge generating layer, wherein the pixel defining layer has a first opening exposing the first electrode, wherein an edge portion of the pixel defining layer adjacent to the first opening covers an edge portion of the first electrode, wherein the charge generating layer has a second opening, and an orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the pixel defining layer on the substrate, wherein the charge generating layer has an edge portion adjacent to the second opening.

A display device includes a substrate, on the substrate, a light-emitting element including a first electrode, a second electrode, and a light-emitting layer and a charge transfer layer between the first electrode and the second electrode, in which the display device includes a light-emitting region of the light-emitting element and a non-light-emitting region that is a peripheral portion of the light-emitting region, a protruding portion is provided in a layer lower than the charge transfer layer in part of the non-light-emitting region, and the charge transfer layer is formed as a continuous film in a display region including the light-emitting region and the non-light-emitting region on the substrate, and includes a thin film portion, on the protruding portion, being thinner than a portion in the light-emitting region and a portion in the non-light-emitting region other than the protruding portion.

A highly reliable display device is provided. The display device includes a first light-emitting element and a second light-emitting element adjacent to the first light-emitting element. The first light-emitting element includes a first pixel electrode, a first EL layer over the first pixel electrode, and a common electrode over the first EL layer, and the second light-emitting element includes a second pixel electrode, a second EL layer over the second pixel electrode, and the common electrode over the second EL layer. An end portion of the first pixel electrode and an end portion of the second pixel electrode each have a tapered shape. The first EL layer covers the end portion of the first pixel electrode, and the second EL layer covers the end portion of the second pixel electrode. The first EL layer includes a region with a thickness less than or equal to 150 nm.