A display panel includes a circuit layer on a base substrate, a first electrode and an auxiliary electrode disposed on the circuit layer, and spaced apart from each other, a charge generation layer on the first electrode and the auxiliary electrode, a first opening region being defined in the charge generation layer, a second electrode on the charge generation layer, a first organic layer disposed between the first electrode and the charge generation layer, a second opening region being defined in the first organic layer, and a second organic layer disposed between the charge generation layer and the second electrode, a third opening region being defined in the second organic layer. The second electrode is electrically connected to the auxiliary electrode through the first to third opening regions, and the second organic layer includes a protrusion adjacent to the third opening region.

A display panel includes a circuit layer on a base substrate, a first electrode and an auxiliary electrode disposed on the circuit layer, and spaced apart from each other, a charge generation layer on the first electrode and the auxiliary electrode, a first opening region being defined in the charge generation layer, a second electrode on the charge generation layer, a first organic layer disposed between the first electrode and the charge generation layer, a second opening region being defined in the first organic layer, and a second organic layer disposed between the charge generation layer and the second electrode, a third opening region being defined in the second organic layer. The second electrode is electrically connected to the auxiliary electrode through the first to third opening regions, and the second organic layer includes a protrusion adjacent to the third opening region.

An organic light emitting display device is provided. The organic light emitting display device includes at least two or more light emitting parts between an anode and a cathode and each having a light emitting layer. At least one of the at least two or more light emitting parts includes an organic layer. The organic layer is formed of a compound comprising a functional group that reacts with alkali metals or alkali earth metals and a functional group with electron transport properties.

Embodiments of a display device are described. A display device includes first and second sub-pixels. The first sub-pixel includes a first light source having a quantum dot (QD) film, a blocking layer disposed on the QD film, and a first portion of an organic phosphor film disposed on the blocking layer and a first substrate configured to support the first light source. The blocking layer is configured to prevent emission of light from the first portion of the organic phosphor film and the QD film is configured to emit a primary emission peak wavelength in a red, green, cyan, yellow, or magenta wavelength region of an electromagnetic (EM) spectrum. The second sub-pixel includes a second light source and a second substrate configured to support the second light source. The second light source has a second portion of the organic phosphor film disposed adjacent to the QD film. The second portion of the organic phosphor film is configured to emit a primary emission peak wavelength in a blue, violet, or ultraviolet wavelength region of an EM spectrum.

An organic light emitting device including: a substrate; a first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode and including an emission layer, wherein one of the first electrode and the second electrode is a reflective electrode and the other is a semitransparent or transparent electrode, and wherein the organic layer includes a layer having at least one of the compounds having at least one carbazole group, and a flat panel display device including the organic light emitting device. The organic light emitting device has low driving voltage, excellent current density, high brightness, excellent color purity, high efficiency, and long lifetime.

A display apparatus including an OLED (organic light-emitting device) substrate having a structure in which at least one blue light-emitting unit and at least one green light-emitting unit are stacked, wherein the OLED substrate generates a mixed light of a blue light and a green light; and a color controller provided on the OLED substrate to adjust color of a light generated from the OLED substrate. The color controller includes a first color control element having a plurality of first quantum dots for green conversion; a second color control element having plurality of second quantum dots for red conversion; a third color control element for presenting a blue color; a first color filter provided on the first color control element; and a second color filter provided on the second color control element.

A light-emitting device with high emission efficiency is provided. The light-emitting device includes at least a light-emitting layer between an anode and a cathode. The light-emitting layer contains a light-emitting substance, a first organic compound, and a second organic compound. The light-emitting substance is a substance that emits fluorescent light. The first organic compound has any one of an anthracene skeleton, a tetracene skeleton, a phenanthrene skeleton, a pyrene skeleton, a chrysene skeleton, a carbazole skeleton, a benzocarbazole skeleton, a dibenzocarbazole skeleton, a dibenzofuran skeleton, a benzonaphthofuran skeleton, a bisnaphthofuran skeleton, a dibenzothiophene skeleton, a benzonaphthothiophene skeleton, a bisnaphthothiophene skeleton, and a fluoranthene skeleton. The second organic compound has any one of a fluorenylamine skeleton, a spirobifluorenylamine skeleton, a dibenzofuranylamine skeleton, a carbazolamine skeleton, a benzocarbazolamine skeleton, a dibenzocarbazolamine skeleton, a dibenzofuranamine skeleton, a benzonaphthofuranamine skeleton, a bisnaphthofuranamine skeleton, a dibenzothiophenamine skeleton, a benzonaphthothiopheneamine skeleton, a bisnaphthothiopheneamine skeleton, and an arylamine skeleton.

An organic light-emitting diode display panel is disclosed. By using four display panels sequentially disposed in a stack arrangement from top to bottom, light emitted in a same direction from each of the display panels, and subpixels of the four display panels not overlapping one another, a screen resolution of the organic light-emitting diode display panel can increase by three times without increasing pixel density of masks or density of array layers.

An organic light-emitting diode display panel is disclosed. By using four display panels sequentially disposed in a stack arrangement from top to bottom, light emitted in a same direction from each of the display panels, and subpixels of the four display panels not overlapping one another, a screen resolution of the organic light-emitting diode display panel can increase by three times without increasing pixel density of masks or density of array layers.

The present disclosure relates to a display device, a display panel and a driving circuit, and a driving method. The display panel includes a driving backplane and a light emitting device layer, and the driving backplane includes multiple pixel driving circuits, the light emitting device layer includes multiple light emitting units distributed in an array, the light emitting unit includes multiple light emitting devices stacked in a direction away from the driving backplane, and light emitting devices other than a light emitting device closest to the driving backplane in a direction perpendicular to the driving backplane are transparent devices; and in the same light emitting unit, at least part of the light emitting devices are coupled to the pixel driving circuits for emitting light under driving of the pixel driving circuits, and at least two light emitting devices in the same light emitting unit have different light emitting materials.