A display device includes: a substrate including a folding area and a non-folding area adjacent to the folding area; a plurality of first pixels in the folding area and each having a first light emitting area; a plurality of second pixels in the non-folding area and each having a second light emitting area having a size that is different from a size of the first light emitting area; and a window on the first and second pixels and including a plurality of grooves repeatedly arranged along a first direction in the folding area, and wherein each of the grooves includes a first groove formed from a first surface of the window toward a second surface of the window facing the first surface and a second groove formed from the second surface toward the first surface, and the first groove and the second groove are alternately arranged.

A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer.

A display including first to n-th pixels electrically connected with a first data line, and a data compensator for generating a reference voltage of a k-th pixel (k being between 1 and n) based on a first coupling voltage between the k-th pixel and the first data line and a second coupling voltage between the k-th pixel and a second data line, and comparing an average voltage generated based on a reference voltage of at least one of the first to n-th pixels with the reference voltage of the k-th pixel to generate a compensation signal, wherein the reference voltage of at least one of the first to n-th pixels is based on a coupling voltage between the at least one of the first to n-th pixels and the first data line and based on a coupling voltage between the pixels and the second data line.

The present disclosure provides an organic light-emitting device and an organic light-emitting display apparatus. The organic light-emitting device includes a first electrode layer; an organic light-emitting layer disposed on a surface of the first electrode layer, wherein the organic light-emitting layer includes a light-emitting area and a non-light-emitting area; and a second electrode layer disposed on a surface of the organic light-emitting layer away from the first electrode layer, wherein the second electrode layer is correspondingly disposed on a surface of the non-light-emitting area such that light emitted from the light-emitting area passes through the second electrode layer.

A display device includes semiconductor nanoparticles. An organic light emitting diode (OLED) display device includes the semiconductor nanoparticles, a semiconductor particle of the semiconductor nanoparticles including: a core including a compound semiconductor; and a shell surrounding the core. The shell includes a metal oxide (and/or metalloid oxide) having a bandgap of about 3.5 eV or more, and having a sum (?E.sub.CB+?E.sub.VB) of a conduction band offset (?E.sub.CB) with the compound semiconductor included in the core and a valence band offset (?E.sub.VB) with the compound semiconductor included in the core of about 3 eV or more.

A sealed structure which has high sealing capability and whose border can be slim is provided. The sealed structure includes a pair of substrates whose respective surfaces face each other with a space therebetween, and a glass layer which is in contact with the substrates, defines a space between the substrates, and has at least one corner portion and side portions in continuity with the corner portion. The width of the corner portion of the glass layer is smaller than or equal to that of the side portion of the same. The sealed structure may comprise a highly reliable light-emitting element including a layer containing a light-emitting organic compound provided between a pair of electrodes.

A light emitting device having an anode, a cathode, a first organic layer and a second organic layer disposed between the anode and the cathode is provided. The first organic layer is a layer containing a compound represented by the formula (T) and a fluorescent compound represented by the formula (B) and the second organic layer is a layer containing a crosslinked body of a crosslink material, wherein the variable groups are as defined in the specification.

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The present disclosure provides a display panel including a substrate, an anode on the substrate, a pixel defining layer on the anode, a light-emitting layer on the pixel defining layer, a first organic layer on the light-emitting layer and an inorganic layer on surfaces of the plurality of pixel walls in the pixel defining layer and the first organic layer. The pixel defining layer includes a plurality of pixel walls and pixel defining areas. The light-emitting layer is in the pixel defining areas and covering the anode. The first organic layer includes a plurality of first protrusions. The inorganic layer includes a plurality of second protrusions, the second protrusions are located on a side of the inorganic layer away from the first organic layer, and each of the second protrusions corresponds to each of the first protrusions. A display panel preparation method and a display device are further provided.

A first method comprises providing a plurality of organic light emitting devices (OLEDs) on a first substrate. Each of the OLEDs includes a transmissive top electrode. The plurality of OLEDs includes a first portion of OLEDs and a second portion of OLEDs that is different from the first portion. The first method further includes depositing a first capping layer over at least the first portion of the plurality of OLEDs such that the first capping layer is optically coupled to at least the first portion of the plurality of OLEDs. A second capping layer is deposited over at least the second portion of the plurality of OLEDs such that the second capping layer is optically coupled to the second portion of the plurality of OLEDs but not the first portion of the plurality of OLEDs.

The present disclosure provides a display panel including a substrate, an anode on the substrate, a pixel defining layer on the anode, a light-emitting layer on the pixel defining layer, a first organic layer on the light-emitting layer and an inorganic layer on surfaces of the plurality of pixel walls in the pixel defining layer and the first organic layer. The pixel defining layer includes a plurality of pixel walls and pixel defining areas. The light-emitting layer is in the pixel defining areas and covering the anode. The first organic layer includes a plurality of first protrusions. The inorganic layer includes a plurality of second protrusions, the second protrusions are located on a side of the inorganic layer away from the first organic layer, and each of the second protrusions corresponds to each of the first protrusions. A display panel preparation method and a display device are further provided.