Abstract: A communication device according to an embodiment comprises: an antenna unit; and a grounding region for emitting a communication signal of the antenna unit, wherein the grounding region cannot overlap with another region inside the communication device, which includes a region in which the antenna unit is disposed.

Abstract: A positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed. The positive active material includes a core including a lithium intercalation compound and a crystalline coating compound on a surface of the core and including a crystalline aluminum hydroxide, a crystalline aluminum oxyhydroxide, or a combination thereof.

Abstract: The present invention provides a colored thin film solar cell capable of minimizing reduction of efficiency of a thin film solar cell and improving a utility value by visually changing a black color of the thin film solar cell into an aesthetically pleasing color to exhibit an exterior appearance, thereby facilitating commercialization of the thin film solar cell, and provides a method for manufacturing the same.

Abstract: The present invention relates to an electricity feeding structure, comprising: a resonator including an electricity feeding part and a ground part connected to the electricity feeding part; a resonance adding part disposed between the electricity feeding part and the ground part; and a controlling part disposed in at least one of the electricity feeding part, the resonance adding part and the ground part. According to the present invention, since the electricity feeding structure includes the controlling part, it is possible to easily control the resonant frequency band of an antenna device.

Abstract: A communication device according to an embodiment comprises: an antenna unit; and a grounding region for emitting a communication signal of the antenna unit, wherein the grounding region cannot overlap with another region inside the communication device, which includes a region in which the antenna unit is disposed.

Abstract: A side view LED package for a backlight unit includes a package body having a cavity with an inclined inner sidewall, first and second lead frames arranged in the package body, the cavity of the package body exposing a portion of at least one of the first and second lead frames placed in a bottom of the cavity to outside, a light emitting diode chip mounted on the bottom of the cavity to be electrically connected to the first and second lead frames, and a transparent encapsulant arranged in the cavity surrounding the light emitting diode chip. The cavity has a depth larger than a mounting height of the light emitting diode chip and not exceeding six times of the mounting height. The height of the sidewall is shortened to improve beam angle characteristics of emission light, increase light quantity, and prevent a molding defect of the sidewall.

Abstract: A composite cathode active material, a cathode including the same, a lithium battery including the cathode, and preparation method thereof are disclosed. The composite cathode active material includes: a core capable of intercalating and deintercalating lithium; and a crystalline coating layer disposed on at least part of a surface of the core, wherein the coating layer include a metal oxide.

Abstract: Provided are a method of manufacturing a composite positive active material, a composite positive active material manufactured by the method, and a positive electrode and a lithium battery including the composite positive active material. The method may include acid-treating an overlithiated lithium transition metal oxide; and applying fluorine onto the acid-treated overlithiated lithium transition metal oxide using a fluorine compound.

Abstract: A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide being doped with magnesium and having an atomic ratio of Mg/Co of about 0.0035:1 to about 0.01:1.

Abstract: A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide including a magnesium (Mg)-doped lithium cobalt composite oxide having an atomic ratio of Mg to cobalt (Co) of about 0.0035:1 to about 0.01:1, wherein the Mg-doped lithium cobalt composite oxide further includes fluorine (F).

Abstract: A positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed. The positive active material includes a core including a lithium intercalation compound and a crystalline coating compound on a surface of the core and including a crystalline aluminum hydroxide, a crystalline aluminum oxyhydroxide, or a combination thereof.

Abstract: The present invention relates to a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode includes: a current collector; and a positive electrode active material positioned on at least one surface of the active material layer current collector. The positive electrode active material layer includes a small particle size active material having an average particle diameter D50 of 2 ?m to 4 ?m and a first coating layer positioned at a surface thereof, and a large particle size active material having an average particle diameter D50 of 17 ?m to 21 ?m and a second coating layer positioned at the surface thereof.

Abstract: A positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode may include a current collector and a positive active material layer on the current collector, wherein the positive active material layer may include a positive active material and a Fe-containing oxide, and the Fe-containing oxide is included in an amount of about 0.015 parts by weight to about 8.5 parts by weight based on 100 parts by weight of the positive active material.

Abstract: Disclosed herein is an MEMS variable capacitor and its driving method, the MEMS variable capacitor including, a first electrode, a second electrode floating over the first electrode upper part, a fixed electrode separated at the second electrode side surface, and a drifting electrode placed between the second electrode and the fixed electrode, connected to the second electrode, and physically contacting the fixed electrode by a voltage applied to the fixed electrode.

Abstract: Disclosed is an antenna apparatus. The antenna apparatus includes a feeding pad for supplying a signal, a main device extended from the feeding pad, and a sub-device extended from the feeding pad and spaced apart from the main device while overlapping with the main device. The antenna apparatus includes the sub-device overlapped with the main device, so that the resonance frequency band of the antenna apparatus is enlarged.

Abstract: A positive active material for a rechargeable lithium battery includes a core including an overlithiated oxide represented by Chemical Formula 1, a first coating layer on the core and including a compound having a spinel structure, and a second coating layer on the first coating layer and including a compound represented by Chemical Formula 2. The compound having a spinel structure shows a peak between about 2.6 V and about 2.7 V in a graph of differential capacity dQ/dV vs. voltage, where the voltage is between about 4.7 V and about 2.5 V. In Chemical Formula 1, 0<x<1, 0<a<1, 0<b<1, 0<c<1, and a+b+c=1. In Chemical Formula 2, 0?d<1 and 0<e?1. xLi2MnO3.(1?x)LiNiaCobMncO2,??Chemical Formula 1 LidTieO2.

Abstract: A composite precursor represented by Formula 1, a composite prepared therefrom represented by Formula 2, a method of preparing a composite precursor and a composite, a positive electrode for lithium secondary battery including the same, and a lithium secondary battery employing the same. aMn3O4-bM(OH)2??Formula 1 wherein in Formula 1, 0<a?0.8, 0.2?b<1 and M is at least one metal selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron, (Fe), cobalt (Co), nickel (Ni), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), and boron (B) aLi2MnO3-bLiyMO2??Formula 2 wherein in Formula 2, 0?a?0.6, 0.4?b?1 1.0?y?1.05, and M is at least one metal selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, and B.

Abstract: Disclosed are an antenna apparatus and a feeding structure thereof. The feeding structure includes at least one feeding unit; at least one ground unit connected to the feeding unit; and a ground member connected to the ground unit, and the antenna apparatus includes the feeding structure. Thus, a plurality of signal transferring paths is formed in the antenna apparatus so that the operation efficiency of the antenna apparatus is improved.

Abstract: Provided are a positive active material that has a decreased amount of Li-containing impurities that remain on a lithium transition metal composite oxide surface to decrease an amount of gas generation and has improved lifespan properties, a method of preparing the same, a positive electrode for a lithium secondary battery including the positive active material, and a lithium secondary battery including the same.

Abstract: The invention relates to a high power LED package, in which a package body is integrally formed with resin to have a recess for receiving an LED chip. A first sheet metal member is electrically connected with the LED chip, supports the LED chip at its upper partial portion in the recess, is surrounded by the package body extending to the side face of the package body, and has a heat transfer section for transferring heat generated from the LED chip to the metal plate of the board and extending downward from the inside of the package body so that a lower end thereof is exposed at a bottom face of the package body thus to contact the board. A second sheet metal member is electrically connected with the LED chip spaced apart from the first sheet metal member for a predetermined gap, and extends through the inside of the package body to the side face of the package body in a direction opposite to the first sheet metal member. A transparent sealant is sealingly filled up into the recess.