Abstract: The present disclosure relates to an offset elimination operation of an internal operational amplifier of a data driving circuit and relates to a technique that applies different offset elimination methods for each position of an operational amplifier.

Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include a lithium metal oxide particle containing nickel and having a mole fraction of cobalt of 0.02 or less among all elements except lithium and oxygen.

Abstract: An organic light-emitting device is provided. The organic light-emitting device comprises a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode. The device further comprises of a phosphorescent dopant and a phosphorescent host that includes at least two hole transport materials. The mixed phosphorescent host materials increase energy transfer efficiency, thereby improving the efficiency and lifespan of the resulting organic light-emitting device.

Abstract: A thin film deposition apparatus is disclosed. In one embodiment, the apparatus includes i) a deposition source configured to discharge a deposition material, ii) a deposition source nozzle unit disposed at a side of the deposition source and comprising a plurality of deposition source nozzles arranged in a first direction and iii) a patterning slit sheet disposed opposite to the deposition source nozzle unit and comprising a plurality of patterning slits arranged in a second direction substantially perpendicular to the first direction. The patterning slit sheet may include: i) a base sheet, in which a plurality of sub-patterning slits are formed in the second direction and ii) a plurality of patterning bars disposed between adjacent sub-patterning slits to form the patterning slits. Further, the deposition apparatus is configured to perform deposition while the substrate is moved relative to the thin film deposition apparatus in the first direction.

Abstract: A thin film deposition apparatus is disclosed. In one embodiment, the apparatus includes i) a deposition source configured to discharge a deposition material, ii) a deposition source nozzle unit disposed at a side of the deposition source and comprising a plurality of deposition source nozzles arranged in a first direction and iii) a patterning slit sheet disposed opposite to the deposition source nozzle unit and comprising a plurality of patterning slits arranged in a second direction substantially perpendicular to the first direction. The patterning slit sheet may include: i) a base sheet, in which a plurality of sub-patterning slits are formed in the second direction and ii) a plurality of patterning bars disposed between adjacent sub-patterning slits to form the patterning slits. Further, the deposition apparatus is configured to perform deposition while the substrate is moved relative to the thin film deposition apparatus in the first direction.

Abstract: Disclosed is a full color organic electroluminescence display device, comprising a substrate; a first electrode; organic film layers including red, green and blue emission layers and an electron transporting layer; and a second electrode. The thickness of the electron transporting layer, which is preferably formed as a common layer, is different in the red and green emission regions from that in the blue emission region so that the device has an excellent purity of color and improved luminous efficiency of red and green colors.

Abstract: An organic electroluminescent (EL) device which has a light emitting layer composed of at least one phosphorescent dopant disposed between a first electrode and a second electrode; and a blue light emitting layer contacting the light emitting layer, wherein the light emitting layer has a hole transport material and an electron transport material as a host.

Abstract: An organic light-emitting device is provided that includes an emission layer containing a phosphorescent dopant and a bipolar phosphorescent host interposed between a first electrode and a second electrode. The bipolar phosphorescent host is a compound represented by formula 1: A—C—B??(1) where A is a hole transport unit, B is an electron transport unit, and C is a bond or a linking group. The bipolar compound can transport both holes and electrons. The organic light-emitting device has high efficiency and a long lifetime.

Abstract: An organic EL device is constructed with a first electrode, a light-emitting layer, a second electrode, and an organic layer which includes a biphenylenediamine compound and is interposed between the first electrode and the light-emitting layer. The organic layer formed between the first electrode and the light-emitting layer has both hole transport and hole injection properties. With this structure, the organic EL device has improved lifetime characteristics in spite of absence of a hole injection layer. A buffer layer including an organic compound with p-type semiconductive property may be further formed between the first electrode and the organic layer including the 4,4?-biphenylenediamine compound to facilitate hole injection from the first electrode and transport an injected hole to the light-emitting layer. Therefore, the organic EL device can have a lower driving voltage, thereby improving a device lifetime.

Abstract: An organic light emitting display device is disclosed. The device includes a substrate; a first electrode formed on the substrate; an organic layer including at least an emission layer and formed on the first electrode; and a second electrode formed on the organic layer. The emission layer includes a host and a dopant material. The dopant is one of materials having the structure of Formula 1, where R may be one selected from the group consisting of ethylene, an ethylene derivative, stilbene, a stilbene derivative. Also, R1 to R6 may be different from or equal to each other, and each is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C5 to C20 aryl group, a C3 to C30 heterocyclic group, and an aliphatic C3 to C30 hydrocarbon group.

Abstract: An emitting compound for an organic electroluminescent device, and an organic electroluminescent device using the same, supply an effective luminance, an efficient driving voltage, and color purity. The emitting compound has an imidazo-pyridine frame represented as in the following Formula 1: where R1 to R14, each of which is independent, refer to the functional groups recited herein.

Abstract: An organic electroluminescent device includes an emission layer interposed between a first electrode and a second electrode. The emission layer may be composed of a host material and a phosphorescent dopant material. The host material may be composed of a mixture of a hole transport material and an electron transport material. The hole transport material may be a carbazole compound and the electron transport material may include at least a compound selected from spirofluorenes and organic metal complexes. The use of the mixture facilitates the re-combination of holes and electrons in neighboring organic layers, thus decreasing the driving voltage and increasing the luminous efficiency and lifetime of the organic electroluminescent device.

Abstract: An organic light emitting device including a first electrode, a second electrode, and an emission layer arranged between the first electrode and the second electrode, the emission layer comprising at least two electron transport materials adapted to serve as a host and a phosphorescent dopant. The use of at least two electron transport materials as a host facilitates the re-combination of holes and electrons in neighboring organic layers, thus improving the luminous efficiency and the lifetime of the organic light emitting device.

Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.

Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.

Abstract: An evaporation source machine and a vacuum deposition apparatus using the same, including a vacuum chamber, a crucible, a heater, and a multi-layered inner plate positioned inside the crucible, wherein each layer of the multi-layered inner plate has at least one aperture, such that evaporated material may be discharged from a bottom of the crucible through the multi-layered inner plate into the vacuum chamber.

Abstract: An organic light emitting display device is disclosed. The device includes a substrate; a first electrode formed on the substrate; an organic layer including at least an emission layer and formed on the first electrode; and a second electrode formed on the organic layer. The emission layer includes a host and a dopantmaterial. The dopant is one of materials having the structure of Formula 1, where R may be one selected from the group consisting of ethylene, an ethylene derivative, stilbene, a stilbene derivative. Also, R1 to R6 may be different from or equal to each other, and each is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C5 to C20 aryl group, a C3 to C30 heterocyclic group, and an aliphatic C3 to C30 hydrocarbon group.

Abstract: An organic light-emitting device is provided that includes an emission layer containing a phosphorescent dopant and a bipolar phosphorescent host interposed between a first electrode and a second electrode. The bipolar phosphorescent host is a compound represented by formula 1: A-C-B ??(1) where A is a hole transport unit, B is an electron transport unit, and C is a bond or a linking group. The bipolar compound can transport both holes and electrons. The organic light-emitting device has high efficiency and a long lifetime.

Abstract: An organic electroluminescent display device including a first electrode and a second electrode formed on a substrate, and a plurality of organic film layers between the first and second electrodes, including a first organic film layer provided between the emitting layer and the second electrode, and a second organic film provided between the emitting layer and the first organic film layer, wherein the first organic film layer includes a first organic metal complex compound, and the second organic film layer includes a mixture of a charge carrier transport material and a second organic metal complex compound.

Abstract: An organic electroluminescent device includes an emission layer interposed between a first electrode and a second electrode. The emission layer may be composed of a host material and a phosphorescent dopant material. The host material may be composed of a mixture of a hole transport material and an electron transport material. The hole transport material may be a carbazole compound and the electron transport material may include at least a compound selected from spirofluorenes and organic metal complexes. The use of the mixture facilitates the re-combination of holes and electrons in neighboring organic layers, thus decreasing the driving voltage and increasing the luminous efficiency and lifetime of the organic electroluminescent device.