Abstract: The present invention relates to positive electrode active material powder including overlithiated manganese-based oxide particles, which are represented by the disclosed Formula 1 and are in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 2 to 30 or less nodules, and a positive electrode and a lithium secondary battery which include the positive electrode active material powder.

Abstract: The present disclosure relates to a transmittance-variable optical laminate including a first polarizing plate, a first transparent conductive layer formed on a first surface of the first polarizing plate, a second polarizing plate arranged to be opposite the first polarizing plate, a second transparent conductive layer formed on a first surface of the second polarizing plate and arranged to be opposite the first transparent conductive layer, and a liquid crystal layer provided between the first transparent conductive layer and the second transparent conductive layer, in which at least one of the first and second transparent conductive layers is in direct contact with either the first polarizing plate or the second polarizing plate, and at least one of the first and second polarizing plates has a single transmittance color b* value of ?6.0 to ?3.0.

Abstract: A refrigerator and a method of controlling an operation thereof are proposed. In the refrigerator and method thereof, heat control of heaters for preventing a damper from freezing is performed according to at least any one condition set in consideration of a room temperature and refrigerator internal humidity. Accordingly, consumption of power due to unnecessary heat generation of the heaters may be reduced, thereby improving the power consumption.

Abstract: A refrigerator includes a refrigerating compartment, a freezing compartment, and an ice-making compartment. The refrigerating compartment is configured to receive cool air from a refrigerating compartment side grille fan assembly, and the ice-making compartment is configured to be located any one refrigerating compartment door and to receive cool air from a freezing compartment side grille fan assembly with the freezing compartment. The refrigerating compartment side grille fan assembly is configured to supply a greater amount of cool air to the side where the ice-making compartment and the refrigerating compartment side grille fan assembly are located, and to perform cool air supply proportional to temperature influence provided from the ice-making compartment and the refrigerating compartment side grille fan assembly.

Abstract: The present invention relates to a lithium secondary battery which includes a positive electrode including an overlithiated manganese-based oxide, in which an amount of manganese among total metals excluding lithium is greater than 50 mol % and a ratio (Li/Me) of the number of moles of the lithium to the number of moles of the total metals excluding the lithium is greater than 1, as a positive electrode active material; a negative electrode including a silicon-based negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and an electrolyte, and satisfies Equation (1). 0.25 A ? B ? 0 . 6 ? A Equation ? ( 1 ) In Equation (1), A is a discharge curve area in a voltage range of 2.0 V to 4.6 V of a dQ/dV graph obtained by differentiating a graph of battery discharge capacity Q and voltage V after one cycle which are measured while charging the lithium secondary battery at 0.1 C to 4.

Abstract: A refrigerator is configured to supply cool air to a refrigerating compartment, a freezing compartment, and an ice-making compartment by a single evaporator. A cool air passage for the ice-making compartment for supplying cool air to the ice-making compartment is configured to supply the cool air to an upper space in a cool air passage for the freezing compartment, which supplies cool air to the refrigerating compartment and the freezing compartment, through an upper supply passage. Accordingly, since additional cool air is supplied to the cool air passage for the freezing compartment by using the upper supply passage, sufficient cool air is supplied to the refrigerating compartment and the freezing compartment by the single evaporator.

Abstract: The present invention relates to a variable transmittance optical laminate and a manufacturing method therefor, a smart window comprising same, and automobile and building window systems using same, the variable transmittance optical laminate includes: a first laminate in which a first polarizing plate, a first transparent conductive layer, and a first alignment layer are sequentially laminated; a second laminate which faces the first laminate and in which a second polarizing plate, a second transparent conductive layer, and a second alignment layer are sequentially laminated; a liquid crystal layer disposed between the first laminate and the second laminate; and a sealant formed along the outer circumferential surface of the liquid crystal layer and sealing the liquid crystal layer.

Abstract: A steel for a gear includes, based on a total weight of the steel: C: 0.10-0.30 wt %, Si: 0.60-0.80 wt %, Mn: 0.25-0.75 wt %, Cr: 1.80-2.20 wt %, Ni: 0.50-1.50 wt %, Mo: 0.20-0.40 wt %, Nb: 0.025-0.050 wt %, V: 0.030-0.050 wt %, and a balance of Fe and inevitable impurities, wherein contents of Nb and V satisfy the following <Relationship Formula 1>: 0.055<[Nb]+[V]<0.100??<Relationship Formula 1>, wherein [Nb] represents a content of Nb and [V] represents a content of V.

Abstract: A positive electrode active material powder includes overlithiated manganese-based oxide particles, which are represented by [Formula 1] and are in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 2 to 30 nodules. LiaNibCocMndMeO2??[Formula 1] wherein 1<a, 0?b?0.5, 0?c?0.1, 0.5?d<1.0, and 0?e?0.2, and M is at least one selected from the group consisting of aluminum (Al), boron (B), cobalt (Co), tungsten (W), magnesium (Mg), vanadium (V), titanium (Ti), zinc (Zn), gallium (Ga), indium (In), ruthenium (Ru), niobium (Nb), tin (Sn), strontium (Sr), and zirconium (Zr). The positive electrode active material powder has an average particle diameter D50 of 2.5 ?m or less. A positive electrode and a lithium secondary battery which include the positive electrode active material powder are also provided.

Abstract: A display device includes a substrate, a first barrier layer on the substrate, a lower pattern on the first barrier layer and having a mesh shape defining a disconnection area, a second barrier layer on the first barrier layer, covering the lower pattern, and contacting the first barrier layer in the disconnection area, and a first active pattern on the second barrier layer and overlapping the lower pattern, a gate electrode on the first active pattern and overlapping the lower pattern, a first gate line on the first active pattern extending in a first direction, a second active pattern on the first gate line, a second gate line on the second active pattern extending in the first direction, and a data line on the second gate line extending in a second direction crossing the first direction.

Abstract: A method of manufacturing a lithium secondary battery includes (1) mixing a transition metal precursor and a lithium source material and then sintering the mixture to prepare a lithium composite transition metal oxide, (2) mixing the lithium composite transition metal oxide with a cobalt-containing raw material and heat-treating the mixture at 550° C. to 700° C. to form a cobalt coating layer on the oxide, (3) mixing the lithium composite transition metal oxide on which the cobalt coating layer is formed with a boron-containing raw material and heat-treating the mixture at 400° C. to 500° C. to prepare a positive electrode active material including a boron coating layer, (4) applying the positive electrode active material onto a positive electrode current collector to prepare a positive electrode, and (5) assembling the positive electrode, the negative electrode including a silicon-based negative electrode active material, and a separator, and injecting an electrolyte.

Abstract: A display device includes a first region and a second region each including a plurality of pixels, and a plurality of wires connected to the plurality of pixels, respectively, to transmit a signal, where the number of pixels per unit area in the second region is less than the number of pixels per unit area in the first region, and the number of wires per unit area in the second region is less than the number of wires per unit area in the first region.

Abstract: Proposed is a variable-transmittance optical laminate, the optical laminate including a first polarization plate; a first transparent conductive layer formed on one surface of the first polarization plate; a second polarization plate positioned opposite to the first polarization plate; a second transparent conductive layer formed on one surface of the second polarization plate and positioned opposite to the first transparent conductive layer, and a liquid crystal layer interposed between the first transparent conductive layer and the second conductive layer, in which the first polarization plate is formed by laminating an ultraviolet ray protection substrate, a polarizer, and a near-ultraviolet ray protection layer. A method of manufacturing the optical laminate and a smart window including the optical laminate are also proposed.

Abstract: A bearing steel has improved insulation performance by forming a continuous insulating film. The bearing steel includes 0.65 to 1.0 mass % of carbon (C), 1.6 to 2.0 mass % of chromium (Cr), 1.5 to 3.0 mass % of aluminum (Al), 0.8 to 1.2 mass % of manganese (Mn), 0.7 to 1.0 mass % of silicon (Si), 0.1 to 0.3 mass % of nickel (Ni), 0.08 to 0.12 mass % of molybdenum (Mo), and a balance of iron (Fe), in which an oxynitride layer including a nitride layer and an oxide layer is formed on the surface of a material.

Abstract: A positive electrode material for a lithium secondary battery includes a first positive electrode active material and a second positive electrode active material, both of which are lithium composite transition metal oxides containing transition metals. The first positive electrode active material has a larger average particle size (D50) than the second positive electrode active material, wherein a ratio (Li/Me)1 of the mole number of lithium with respect to the total mole number of transition metals of the first positive electrode active material is more than 1 to 1.5 or less, and a ratio (Li/Me)2 of the mole number of lithium (Li) with respect to the total mole number of transition metals of the second positive electrode active material is 0.9 to 1. The second positive electrode active material has a crystallite size of 180 nm or more.

Abstract: A display device includes a first region and a second region each including a plurality of pixels, and a plurality of wires connected to the plurality of pixels, respectively, to transmit a signal, where the number of pixels per unit area in the second region is less than the number of pixels per unit area in the first region, and the number of wires per unit area in the second region is less than the number of wires per unit area in the first region.

Abstract: The present disclosure relates to a slide block, the slide block assembly having a ball bushing bearing may include: a slide block which has formed at one side thereof a guide receiving part capable of receiving a slide guide of which at least a portion is formed as a linear section or a curved section; and a ball bushing bearing of which the inner surface is formed so as to correspond to the slide guide so as to be capable of making sliding contact with the slide guide, and the outer surface is formed so as to correspond to the guide receiving part so as to be capable of making rolling contact with the guide receiving part by means of a ball method.

Abstract: A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, a first positive electrode active material layer and a second positive electrode active material layer sequentially stacked on the positive electrode current collector, wherein the first positive electrode active material layer and the second positive electrode active material layer include a bimodal positive active material, the first positive electrode active material layer includes small-diameter particles in the form of single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.

Abstract: The present invention relates to an electrode of a double-layer structure including a different type of particulate active material having a different average particle diameter, and a secondary battery including the same, and according to the present invention, the mechanical strength and stability of the electrode increases, and the secondary battery to which they are applied exhibits excellent discharge capacity.

Abstract: The present invention relates to a variable transmittance optical laminate and a manufacturing method therefor, a smart window comprising same, and a window and a door for a vehicle and a building, having same applied thereto, the variable transmittance optical laminate comprising: a first polarizing plate comprising a first polarizer; a first transparent conductive layer formed on the inner surface of the first polarizing plate; a second polarizing plate facing the first polarizing plate and comprising a second polarizer; a second transparent conductive layer formed on the inner surface of the second polarizing plate and facing the first transparent conductive layer; and a liquid crystal layer provided between the first transparent conductive layer and the second transparent conductive layer.