An organic light emitting device is described, having an OLED including an anode, a cathode, and at least one organic layer between the anode and cathode. At least a portion of an electrode surface includes a plurality of scattering structures positioned in a partially disordered pattern resembling nodes of a two dimensional lattice. The scattering structures are positioned around the nodes of the two dimensional lattice with the average distance between the position of each scattering structure and a respective node of the lattice is from 0 to 0.5 of the distance between adjacent lattice nodes. A method of manufacturing an organic light emitting device and a method of enhancing the light-extraction efficiency of an organic light emitting device are also described.

An organic light-emitting diode (OLED) display panel and an OLED display device are provided. The (OLED) display panel comprises a first substrate; a first electrode layer disposed on the first substrate and including a plurality of first electrodes; a plurality of light-emitting devices disposed on a surface of the first electrode layer far away from the first substrate and having m number of colors, where m is a positive integer, wherein one light-emitting device corresponds to one color, and given a predetermined value of brightness, the light-emitting devices of two different colors are configured to have a predetermined absolute value of a threshold voltage difference; and a second electrode layer disposed on a surface of the plurality of light-emitting devices far away from the first electrode layer.

A display apparatus includes a substrate, a first insulating layer on the substrate, first metal layers on the first insulating layer and having a compressive stress or a tensile stress of about 100 megapascals (MPa) or less, and a second insulating layer including a first layer covering the first metal layers and a second layer including a material different from a material of the first layer.

A display panel, a method for fabricating the same, and a display device are provided. The display panel includes a substrate, a thin film transistor layer disposed over the substrate, and a light emitting layer disposed over the thin film transistor layer. The light emitting layer includes a hole injection layer, a hole transport layer, an emitting material layer, an electron transport layer, an electron injection layer, a cathode, a capping layer, and an inorganic layer, which are sequentially stacked.

A display apparatus includes a display panel; and a light control member disposed on the display panel. The light control member includes a plurality of partition walls spaced apart from each other, and a plurality of light control units each disposed between any two of the plurality of partition walls, and at least one of the plurality of light control units includes a first region containing organic monomers and an inorganic material and a second region containing the inorganic material dispersed in an organic polymer, thereby improving display quality and reliability of the display apparatus.

A display device includes a light emitting element, and a sealing member on the light emitting element and sealing the light emitting element, wherein the sealing member includes a first inorganic layer on the light emitting element, an organic layer on the first inorganic layer, and a second inorganic layer on the organic layer.

An ink for a display device, the ink includes: an organic material, wherein the organic material has a molecular weight greater than about 500 and less than about 1,000,000, and the organic material in the ink has a concentration and the molecular weight of the organic material satisfy:

y>−3.518*ln(x)+45.59,

wherein y is the concentration of the organic material, and x is the molecular weight of the organic material.

A wavelength selection filter includes a first high refractive index section with a thickness T1, a second high refractive index section with a thickness T2, a high refractive index layer with a refractive index n1, a projection-depression structure layer with a refractive index n2, a filling layer with a refractive index n3, a first high refractive index section with an area ratio R1, and a second high refractive index section with an area ratio R2. With n1>n2, n1>n3, and R1+R2>1, the value of T1×{n1×R1+n2×(1−R1)} is a first parameter, the value of T2×{n1×R2+n3×(1−R2)} is a second parameter, and the ratio of the second parameter to the first parameter is 0.7 or more and 1.3 or less.

The present invention provides an alkali-free glass sheet, which has a content of Li.sub.2O+Na.sub.2O+K.sub.2O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.

A display device may include a pixel area and a transmission area adjacent to the pixel area, a circuit element disposed in the pixel area and including a transistor and a capacitor, a pixel electrode layer disposed in the pixel area and electrically connected to the circuit element, an emission layer disposed on the pixel electrode layer, an opposite electrode layer disposed on the emission layer, and a surface energy control layer disposed between the emission layer and the opposite electrode layer and including a perfluorinated material. The surface energy control layer may have a portion extending into the transmission area.