An organic light emitting apparatus includes light emitting elements arranged adjacent to each other on a surface of a substrate, each of the light emitting elements having a lower electrode, a charge transport layer, a light emitting layer, and an upper electrode. An insulating layer having an opening on the lower electrode is disposed between the adjacent lower electrodes. At least one of the charge transport layer or the light emitting layer is overlapped with a flat portion of the insulating layer in a plan view. In the plan view, an area of the light emitting layer is larger than an area of the charge transport layer.

A light emitting display apparatus includes a planarization layer provided in a substrate, a plurality of anodes provided on the planarization layer, a bank including opening regions exposing the anodes, a light emitting layer provided on the plurality of anodes and the bank, and a cathode provided on the light emitting layer, the cathode including a boundary region cathode and a main cathode, wherein a boundary groove is at an outer portion of each of the plurality of anodes.

A display apparatus includes a first pixel electrode, a bank layer including a first opening overlapping the first pixel electrode, and including an overhang portion, a first protective layer between an outer portion of the first pixel electrode and the overhang portion, an intermediate layer overlapping the first pixel electrode, and a counter electrode on the intermediate layer, the overhang portion has a horizontal length from a first edge of a first side surface of the first protective layer to an edge of the overhang portion and has a vertical distance from the top surface of the first pixel electrode to the overhang portion, the intermediate layer includes a charge generation layer, lower sub-layers below the charge generation layer, and upper sub-layers over the charge generation layer, each of the lower sub-layers and the charge generation layer includes portions separated by the overhang portion.

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 display substrate and a preparation method thereof, a preparation apparatus and a display apparatus are provided, which relate to the technical field of display. The display substrate includes a plurality of light-emitting areas and non-light-emitting areas surrounding respective light-emitting areas. The display substrate includes: a base substrate; a light-emitting functional layer disposed at a side of the base substrate, the light-emitting functional layer including a light-emitting material located in the plurality of light-emitting areas and the non-light-emitting areas. The light-emitting material in the non-light-emitting areas is doped with destructive ions, and the destructive ions are configured for destroying luminescent characteristics of the light-emitting material in the non-light-emitting area.

A light emitting display device may include a first insulating film having recess portions and a flat portion between adjacent recess portions at first and second subpixels adjacent to each other, a first electrode in a recess portion of each of the first and second subpixels, a dummy pattern on the flat portion of the first insulating film and spaced apart from the first electrode, a first electron blocking layer at the first subpixel and a second electron blocking layer at the second subpixel, the first and second electron blocking layers having an edge on the dummy pattern and spaced apart from each other, a first color light emitting layer provided at the first subpixel and covering the edge of the first electron blocking layer, a second color light emitting layer on the second electron blocking layer, and a second electrode on the first and second color light emitting layers.

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 substrate includes a plurality of sub-pixels arranged in a plurality of rows and a plurality of columns, each sub-pixel includes a light-emitting device, and the light-emitting device includes a first electrode, a first light-emitting unit, a charge generation stack layer, a second light-emitting unit, and a second electrode that are stacked in sequence. Light-emitting devices in two adjacent sub-pixels in a first direction emit light of different colors; and a proportion of undesired peaks in an emission peak in a luminescence spectrum corresponding to light emitted by a light-emitting device in at least part of the sub-pixels is less than or equal to 5%.

A display device includes a hole injection layer common to a plurality of light-emitting elements between a light-emitting layer and an anode electrode under the light-emitting layer in the light-emitting element of each pixel. The hole injection layer includes a hole injection section configured to transport positive holes to the light-emitting layer, and a neighboring pixel hole blocking section formed in a portion between the light-emitting elements of adjacent pixels and configured to block transportation of positive holes between the light-emitting elements of the adjacent pixels.

A display device includes: a base layer; a circuit layer on the base layer; and an element layer on the circuit layer and including a light emitting element and a hybrid element, wherein the hybrid element includes: a hybrid anode electrode; a light receiving stack on the hybrid anode electrode; a light emitting stack on the light receiving stack; and a hybrid cathode electrode on the light emitting stack, wherein the light emitting element is configured to be turned on to emit a first color light in a light emitting mode and a light receiving mode, wherein the hybrid element is configured to be turned on to output a second color light in the light emitting mode, and wherein the hybrid element is configured to be turned on to receive the first color light in the light receiving mode.