Abstract: A positive electrode active material for a lithium secondary battery has secondary micro particles having an average particle size (D50) of 1 to 10 ?m formed by agglomeration of primary macro particles having an average particle size (D50) of 0.5 to 3 ?m and a lithium-M oxide coating layer on all or part of a surface, wherein M is at least one selected from the group consisting of boron, cobalt, manganese and magnesium. The secondary macro particles have an average particle size (D50) of 5 to 20 ?m formed by agglomeration of primary micro particles having a smaller average particle size (D50) than the primary macro particles. The primary macro particles and the primary micro particles are represented by LiaNi1?b?c?dCobMncQdO2+?, wherein 1.0?a?1.5, 0<b<0.2, 0<c<0.2, 0?d?0.1, 0<b+c+d?0.2, ?0.1???1.0, and Q is at least one type of metal selected from the group consisting of Al, Mg, V, Ti and Zr.

Abstract: There is provided an illumination system including a driving device including a rectifier configured to receive alternating current (AC) power from an external power source, rectify the AC power, and output rectified power, and a constant current driver configured to receive the rectified power from the rectifier and output constant current; a light emitting device including at least one light emitting diode (LED) driven with the constant current of the driving device, and a forward direction current transmitter configured to control the constant current of the driving device to be applied to the LED in a forward direction; and a detachable electrical connector connecting the driving device and the light emitting device to one another.

Abstract: A light emitting diode (LED) lamp includes an emission unit comprising one or more LED light-emitting devices and a circuit substrate whereon the one or more LED light-emitting devices are mounted; a heat dissipating member whereon the emission unit is mounted and that dissipates heat generated by the emission unit; and a light-transmitting lamp cover directly contacting the heat dissipating member and coupled with the heat dissipating member so as to cover the emission unit, wherein the lamp cover is formed of a light-transmitting material having a thermal conductivity equal to or greater than 9 W/m·K?1.

Abstract: A light emitting diode (LED) lamp includes an emission unit comprising one or more LED light-emitting devices and a circuit substrate whereon the one or more LED light-emitting devices are mounted; a heat dissipating member whereon the emission unit is mounted and that dissipates heat generated by the emission unit; and a light-transmitting lamp cover directly contacting the heat dissipating member and coupled with the heat dissipating member so as to cover the emission unit, wherein the lamp cover is formed of a light-transmitting material having a thermal conductivity equal to or greater than 9 W/m·K?1.

Abstract: A light emitting diode (LED) lamp includes an emission unit comprising one or more LED light-emitting devices and a circuit substrate whereon the one or more LED light-emitting devices are mounted; a heat dissipating member whereon the emission unit is mounted and that dissipates heat generated by the emission unit; and a light-transmitting lamp cover directly contacting the heat dissipating member and coupled with the heat dissipating member so as to cover the emission unit, wherein the lamp cover is formed of a light-transmitting material having a thermal conductivity equal to or greater than 9 W/m·K?1.

Abstract: A variable shelf assembly includes a mounting member mounted in a storage compartment of a refrigerator, a shelf support member coupled to the mounting member such that the shelf support member is vertically movable, a shelf mounted on the shelf support member, and a lifting unit to lift the shelf support member. The mounting member and/or the shelf support member has a plurality of cool air circulation holes through which cool air circulating in the storage compartment passes. The lifting unit includes a driving gear, a driven gear rotatable by the driving gear, a screw shaft coupled to the driven gear, at least one moving member movable by the rotation of the screw shaft, and at least one rotary link having one end rotatably coupled to the moving member and the other end rotatably coupled to the mounting member.

Abstract: A refrigerator which provides an improved installation structure of a receiving device disposed in a storage chamber such that the receiving device can be stably supported in the storage chamber and easily mounted on and separated from the storage chamber. The refrigerator includes a shelf fixing structure which fixes a shelf to the storage chamber. The shelf fixing structure includes an engaging protrusion formed on a lower surface of the shelf at one side of the shelf, a stepped surface formed at the other side of the shelf, a restriction groove formed at a position corresponding to the engaging protrusion to restrict the engaging protrusion, and a restriction portion formed at a position corresponding to the stepped surface to restrict the stepped surface.

Abstract: A refrigerator which provides an improved structure of a receiving device to prevent a receiving container cover from being deformed or damaged. The refrigerator includes a receiving container, and a receiving container cover which covers an upper portion of the receiving container. The receiving container cover includes a front frame portion which forms a front structure, a guide rail extended from a rear portion of the receiving container cover toward a lower portion of the front frame portion, and a reinforcing member extended transversely in the lower portion of the front frame portion to reinforce the strength of the receiving container cover. The guide rail includes a through hole such that the reinforcing member passes through the through hole.

Abstract: Disclosed herein is a refrigerator including a shelf constructed in a structure in which a support panel is mounted on a frame. The refrigerator includes a main body having a storage compartment defined therein and a shelf mounted in the storage compartment. The shelf includes a support panel, a frame to support the edge of the support panel, a support protrusion formed along the inside edge of the frame to support the lower edge of the support panel, catchers formed at the front corners of the frame to catch the front corners of the support panel, and coupling members mounted at the rear corners of the frame to fix the rear corners of the support panel.

Abstract: A refrigerator which provides an improved installation structure of a receiving device disposed in a storage chamber such that the receiving device can be stably supported in the storage chamber and easily mounted on and separated from the storage chamber. The refrigerator includes a shelf fixing structure which fixes a shelf to the storage chamber. The shelf fixing structure includes an engaging protrusion formed on a lower surface of the shelf at one side of the shelf, a stepped surface formed at the other side of the shelf, a restriction groove formed at a position corresponding to the engaging protrusion to restrict the engaging protrusion, and a restriction portion formed at a position corresponding to the stepped surface to restrict the stepped surface.

Abstract: A variable shelf assembly includes a mounting member mounted in a storage compartment of a refrigerator, a shelf support member coupled to the mounting member such that the shelf support member is vertically movable, a shelf mounted on the shelf support member, and a lifting unit to lift the shelf support member. The mounting member and/or the shelf support member has a plurality of cool air circulation holes through which cool air circulating in the storage compartment passes. The lifting unit includes a driving gear, a driven gear rotatable by the driving gear, a screw shaft coupled to the driven gear, at least one moving member movable by the rotation of the screw shaft, and at least one rotary link having one end rotatably coupled to the moving member and the other end rotatably coupled to the mounting member.