An electroluminescent display device includes a substrate on which a plurality of sub-pixels are defined; a first electrode in each sub-pixel on the substrate; a first hole transporting layer on the first electrode; a second hole transporting layer on the first hole transporting layer; a third hole transporting layer on the second hole transporting layer; a light-emitting material layer on the third hole transporting layer; an electron transporting layer on the light-emitting material layer; and a second electrode on the electron transporting layer, wherein the first hole transporting layer includes a P-type dopant and a first hole transporting material, the second hole transporting layer includes the first hole transporting material, and the third hole transporting layer includes a second hole transporting material, and wherein a total thickness of the first and second hole transporting layers is equal to or greater than a thickness of the third hole transporting layer.

An electroluminescent display device includes a substrate on which a plurality of sub-pixels are defined; a first electrode in each sub-pixel on the substrate; a first hole transporting layer on the first electrode; a second hole transporting layer on the first hole transporting layer; a third hole transporting layer on the second hole transporting layer; a light-emitting material layer on the third hole transporting layer; an electron transporting layer on the light-emitting material layer; and a second electrode on the electron transporting layer, wherein the first hole transporting layer includes a P-type dopant and a first hole transporting material, the second hole transporting layer includes the first hole transporting material, and the third hole transporting layer includes a second hole transporting material, and wherein a total thickness of the first and second hole transporting layers is equal to or greater than a thickness of the third hole transporting layer.

The present disclosure relates to a display substrate, a method for preparing the same, and a display device. The display substrate of the present disclosure includes a base substrate, a pixel definition layer located on the base substrate, and a first pixel and a second pixel that are adjacent to each other and defined by the pixel definition layer, in which a spacer function layer for blocking hole transport between adjacent pixels is arranged at at least a part of a contact interface between the second hole transport layer in the second pixel and the light function layer in the first pixel. By providing the spacer function layer, the present disclosure effectively prevents the migration of holes between the hole transport layers of adjacent pixels or between the hole transport layer and the light emitting layer, thereby avoiding accompanying light emission between adjacent pixels.

Disclosed are a light emitting device that includes an additional layer adjacent to a light emitting layer and thus is capable of utilizing, in light emission, holes not used in the light emitting layer, to improve efficiency and lifespan, and a light emitting display device including the same. The light emitting device includes a first electrode and a second electrode facing each other, and an unit comprising a hole transport layer, a light emitting layer, an efficiency-improving layer, and an electron transport layer sequentially stacked between the first electrode and the second electrode, wherein the light emitting layer includes a first host comprising an anthracene derivative and a first blue light emitting dopant, and the efficiency-improving layer includes a second host having bipolarity and a second blue light emitting dopant.

Disclosed are a light emitting element and a display device including the same, wherein a hole generation layer is further provided between a hole transport layer and an emission layer, in addition to an electron blocking layer, in order to control the speed of electrons and holes introduced into the emission layer, whereby it is possible to prevent accumulation of carriers at the electron blocking layer or the hole transport layer, and therefore it is possible to reduce turn-on voltage, to maintain uniform efficiency irrespective of change in current density, to prevent defects at specific gradation, and to increase lifetime.

Disclosed are a light emitting element and a display device including the same, wherein a hole generation layer is further provided between a hole transport layer and an emission layer, in addition to an electron blocking layer, in order to control the speed of electrons and holes introduced into the emission layer, whereby it is possible to prevent accumulation of carriers at the electron blocking layer or the hole transport layer, and therefore it is possible to reduce turn-on voltage, to maintain uniform efficiency irrespective of change in current density, to prevent defects at specific gradation, and to increase lifetime.

Provided is an organic electroluminescent device. The organic electroluminescent device is a blue delayed fluorescent device including an anode, a cathode, an emissive layer disposed between the anode and the cathode and a hole blocking layer disposed between the emissive layer and the cathode, where the hole blocking layer comprises a hole blocking material having a structure of Formula 1, and the emissive layer comprises a first host material, a second host material and a blue delayed fluorescent material having a structure of Formula 3. The blue delayed fluorescent device exhibits excellent overall device performance, such as higher efficiency and longer lifetime. Further provided are a light-emitting device comprising a blue delayed fluorescent unit, a green phosphorescent unit and a red phosphorescent unit and a display assembly comprising the blue delayed fluorescent device and the light-emitting device.

An electronic apparatus includes: an electronic panel comprising a display unit comprising a plurality of pixels and a sensing unit comprising a plurality of sensing electrodes; and an electronic module overlapping with the electronic panel when viewed in a plan view, the sensing unit comprising: a base substrate comprising a hole area overlapping with the electronic module, an active area overlapping with the sensing electrodes, and a peripheral area adjacent to the active area; a connection line in the hole area and connected to a portion of the sensing electrodes; and a conductive light blocking pattern in the hole area and spaced apart from the connection line and the sensing electrodes.

Specifically substituted benzofuro- and benzothienoquinolines and their use in electronic devices, especially electroluminescent devices. When used as charge transport material, charge blocker material and/or host material in electroluminescent devices, the specifically substituted benzofuro- and benzothienoquinolines may provide improved efficiency, stability, manufacturability, or spectral characteristics of electroluminescent devices and reduced driving voltage of electroluminescent devices.

The present disclosure provides an organic emitting compound of the following Formula, and an organic light emitting diode, which includes a first electrode; a second electrode facing the first electrode; and a first emitting material layer positioned between the first electrode and the second electrode and including a first host and the organic emitting compound, and an organic light emitting display device including the organic light emitting diode. ##STR00001##