Abstract: A positive electrode active material, a method for producing the same, and a positive electrode and a lithium secondary battery in including the same are disclosed herein. In some embodiments, a method of producing a positive electrode active material includes mixing a lithium transition metal oxide and a carbon-based material having a hollow structure to form a mixture, and mechanically treating the mixture to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material has a chain shape, and has a specific surface area of 500 m2/g or greater, a graphitization degree (ID/IG) of 1.0 or higher, and a dibutylphthalate (DBP) absorption of 300 mL/100 g or greater.

Abstract: A display device includes a display panel including first pixels arranged in a first row and second pixels arranged in a second row. A viewing angle of the first pixels is different from a viewing angle of the second pixels. The first pixels and the second pixels are disposed in a privacy region of the display panel and a public region of the display panel which is different from the privacy region. The display device further includes a panel driver configured to receive privacy region position information indicating a position of the privacy region, and drive the display panel such that the first pixels emit light in the privacy region of the display panel and the second pixels emit light in the public region of the display panel.

Abstract: A pixel includes first and second subpixels. The first subpixel includes a first light emitting element, a first transistor configured to drive the first light emitting element, a second transistor configured to apply a data voltage to the first transistor in response to a first write gate signal and a fifth transistor configured to apply a power supply voltage to the first transistor in response to an emission signal. The second subpixel includes a second light emitting element having a viewing angle different from the first light emitting element, a sixth transistor configured to drive the second light emitting element, a seventh transistor configured to apply the data voltage to the sixth transistor in response to a second write gate signal different from the first write gate signal and a tenth transistor configured to apply the power supply voltage to the sixth transistor in response to the emission signal.

Abstract: The apparatus for detecting moisture in a building structure comprises at least one inductance element; at least one fixed capacitance element configured not to have a change in capacitance although the moisture is present in the building structure; and at least one variable capacitance element configured to be electrically connected with the at least one fixed capacitance element and have a change in capacitance when the moisture is present in the building structure, wherein at least one first resonant frequency is determined based on the at least one inductance element, the at least one fixed capacitance element, and the at least one variable capacitance element.

Abstract: Disclosed herein are an optimal card recommendation system, a purchase prediction-based optimal card recommendation apparatus, and a method using the apparatus. One or more purchase commodities that are expected to be purchased by a user at a store are predicted, an amount of a payment that is expected to be made by the user at the store is predicted, and an optimal card is predicted, among multiple cards registered in an application for payment, in consideration of at least one of the expected payment amount and the one or more expected purchase commodities. The most suitable payment card may be recommended by predicting a commodity to be purchased by a user and a payment amount for the commodity so that the user may use an automatic payment service when paying for a commodity at a store through his or her mobile terminal.

Abstract: An optical fingerprint input device by where a mark identification is attached to one surface of a prism and reflected by light beams coming from an external light source to be incident on a lens such that erroneous recognition caused by a fingerprint afterimage of water, sweat or oil remaining on the fingerprint contact surface of the prism can be prevented to improve the security of the device, and a visual advertisement can be additionally obtained when a mark identification logo for advertisement is attached on one surface of the prism.

Abstract: An optical fingerprint image input device for a mobile apparatus includes: a plate-shaped fingerprint contact member; a distortion correcting member for correcting distortions; light sources disposed at both sides of the fingerprint contact member, other than an inclined surface or a back light source in a liquid crystal display element; focusing means disposed at an inclined surface side of the distortion correcting member; and an image sensor. In other words, the fingerprint contact member and the distortion correcting member having respective set-up inclined angles are disposed to discern sweat, water or oil and to correct a trapezoidal distortion which is a disadvantage that occurs when a thin fingerprint contact medium is used, and to form a lens system comprised of a cylindrical lens and a spherical lens for adjustment of a ratio of transversal to longitudinal widths of an image.

Abstract: A semiconductor device and a method for forming the same are disclosed. The semiconductor device includes an epitaxial source/drain junction layer having an insulating film thereunder. The method comprises the step of forming a under-cut under an epitaxial source/drain junction layer so that an insulating film filling the under-cut can be formed.