Abstract: A smoke detection apparatus based on multiple wavelengths is provided, which includes: a chamber configured to receive an inflow of a smoke; a detector including a light emitter having a plurality of light sources that radiate light having a plurality of different wavelengths into a space in the chamber, and a light receiver configured to receive scattered light by the plurality of light sources; and a controller configured to control an operation of the detector and to distinguish between fire smoke and non-fire quasi-smoke by detecting and analyzing a light receiving signal of the light receiver.

Abstract: A power transmission device including: a motor to drive a rotary shaft; a first reducer connected to the rotary shaft to reduce rotational angular velocity of the rotary shaft; a second reducer connected to the rotary shaft to reduce rotational angular velocity of the rotary shaft; a first clutch disposed between the rotary shaft and the first reducer to connect and disconnect the rotary shaft and the first reducer; a second clutch disposed between the rotary shaft and the second reducer to connect and disconnect the rotary shaft and the second reducer; and a third clutch disposed outside the second reducer to connect and disconnect the second reducer and an external component.

Abstract: The present invention relates to: a method for producing a polyimide aerogel having low dielectric properties, high insulation, and high strength; and a polyimide aerogel prepared therefrom. The present invention has the technical gist of a method for producing a polyimide aerogel having low dielectric properties, high insulation, and high strength, and a polyimide aerogel prepared therefrom, the method including: a first step of preparing a solvent; a second step of preparing a polyamic acid resin by reacting a diamine-based monomer with an acid anhydride monomer in a solvent; a third step of preparing a polyimide resin solution by imidizing the polyamic acid resin at 150 to 200° C.

Abstract: Provided is a system for detecting flame, which includes a light collecting module configured to collect light emitted from flame and sense location information and intensity information of the collected light, a memory configured to store a program for determining fire information on the basis of the sensed location information and intensity information of the light, and a processor configured to calculate intensity information and fluttering information of the flame from the intensity information of the light by executing the program stored in the memory, to calculate centroid spatial distribution information of the flame from the location information of the light, and to detect whether there is flame on the basis of at least one of the intensity information of the flame, the fluttering information of the flame, and the centroid spatial distribution information.

Abstract: A sterilization module including a main body, a circuit board disposed in the main body, a light source disposed on the circuit board to emit sterilizing light, and a transparent unit to protect the light source from an outside and including a material that transmits the sterilizing light, in which the light source includes a mesa including a first semiconductor layer, an active layer, and a second semiconductor layer, a first electrode electrically connected to the first semiconductor layer, and a second electrode disposed on the second semiconductor layer and electrically connected to the second semiconductor layer, in which the first electrode includes a first contact region disposed on the outer area of the first semiconductor layer and a second contact region at least partially surrounded by the mesa, and a distance between the transparent unit and the circuit board is greater than a height of the light source.

Abstract: The three-dimensional image display apparatus includes: a housing; a light source unit which is mounted in the housing, and emits light; a single light transfer unit which is disposed in the housing to face the light source unit, and refracts, diffracts, or reflects the light emitted from the light source unit; and an image display unit which forms, as an image, the light refracted, diffracted, or reflected by the light transfer unit.

Abstract: Provided is a system for detecting flame, which includes a light collecting module configured to collect light emitted from flame and sense location information and intensity information of the collected light, a memory configured to store a program for determining fire information on the basis of the sensed location information and intensity information of the light, and a processor configured to calculate intensity information and fluttering information of the flame from the intensity information of the light by executing the program stored in the memory, to calculate centroid spatial distribution information of the flame from the location information of the light, and to detect whether there is flame on the basis of at least one of the intensity information of the flame, the fluttering information of the flame, and the centroid spatial distribution information.

Abstract: An apparatus for providing an antibacterial film according to an embodiment of the present disclosure makes it possible to place an antibacterial film over a button on a manipulation panel through an antibacterial film providing unit and an antibacterial film recovery unit, thereby preventing the spread of bacteria that may be transmitted by many users' button manipulation. Additionally, it is possible to automatically replace the antibacterial film that covers the button on the manipulation panel at a predetermined time interval set through an auto-timer unit, thereby improving the convenience of use. Additionally, it is possible to sterilize the antibacterial film after use through a sterilization unit provided in the antibacterial film recovery unit for reuse, thereby achieving resource savings.

Abstract: An inkjet printing apparatus may form a material layer on a substrate. The inkjet printing apparatus includes a stage, an ink-receiving member, and an inkjet head. The stage may support the substrate. The inkjet head overlaps at least one of the stage and the ink-receiving member, may provide a first set of ink to the substrate, and may provide a second set of ink to the ink-receiving member when the substrate is supported by the stage.

Abstract: A sterilizing device includes a pipe having an inlet and an outlet and allowing fluid to move therethrough and a light source provided on one side of the pipe and providing light to the fluid. At least a portion of the pipe is provided in a spiral shape and the inlet and/or the outlet are arranged in a light emitting region.

Abstract: A bulk acoustic wave filter includes series resonators connected to a series arm, and parallel resonators connected to a parallel arm connected to the series arm. Two or more of the series resonators are disposed in parallel on the series arm, and each includes a substrate, a lower electrode on the substrate, a piezoelectric layer on the lower electrode, and an upper electrode on the piezoelectric layer, wherein, when an active region in which the lower electrode, the piezoelectric layer, and the upper electrode overlap each other is viewed from above, a centroid of the active region and a center of a rectangle defining an aspect ratio of the active region match each other, and when the active region is viewed from above, the active region has a shape of polygon symmetrical with respect to at least one axis passing through a center of the rectangle defining the aspect ratio.

Abstract: The present invention provides a novel ligand compound, a transition metal compound and a catalyst composition including the same.

Abstract: A display device includes a substrate having a display area and a non-display area; a first transistor that is disposed on the substrate and that overlaps the display area; a first pixel defining layer disposed on the first transistor; a first emission layer disposed in the first pixel defining layer; a second pixel defining layer that is disposed on the substrate and that overlaps the non-display area; a second emission layer disposed in the second pixel defining layer; a second electrode disposed on the first emission layer and the second emission layer; and an encapsulation organic layer disposed on the second electrode, wherein the encapsulation organic layer overlaps the first pixel defining layer and the second pixel defining layer, and an end of the encapsulation organic layer is disposed inside the second pixel defining layer.

Abstract: Disclosed is a lamp for a vehicle, the lamp including: a light source unit configured to emit light forward; a collimator which is provided in front of the light source unit and on which the light emitted from the light source unit is incident; and a multi facet lens (MFL) which is provided in front of the collimator and on which the light emitted from the collimator is incident. The MFL includes: a plurality of facets; and stepped portions, which are provided between the plurality of facets and each of which connects the two neighboring facets. At least some of exit surfaces of the plurality of facets are perpendicular to the ground or have shapes inclined upward in a forward direction.

Abstract: A bulk acoustic wave resonator is provided. The bulk acoustic wave resonator includes a board; a resonant portion including a first electrode, a piezoelectric layer, and a second electrode, and disposed on the board, and a temperature compensation layer disposed on the resonant portion, wherein the temperature compensation layer includes a temperature compensation portion formed of a dielectric and a loss compensation portion formed of a material different from a material of the temperature compensation portion, and wherein each of the temperature compensation portion and the loss compensation portion includes a plurality of linear patterns, and the linear patterns of the temperature compensation portion and the linear patterns of the loss compensation portion are alternately disposed.

Abstract: A black image type hidden light system applied to a vehicle is composed of a control module coupled to a hidden lamp module in which an outer lens, an inner lens, and a light source are assembled in a lamp housing, and a black color surface of the outer lens covers an inner space of the lamp housing to block the exposure to the outside and transmits the light fully reflected to the inner lens to the outside, thereby forming a deposition image in black when not lit and a lamp image or a lighting image when lit, and in particular, optimizes a light transmittance with an amount of addition of a carbon black material mixed with a polycarbonate (PC) material, thereby substantially enabling the mass-production beyond the limitation of an AL deposition image.

Abstract: A bulk-acoustic wave resonator includes: a substrate; a lower electrode disposed on the substrate; a piezoelectric layer at least partially covering the lower electrode; and an upper electrode at least partially covering the piezoelectric layer. On a surface of the bulk-acoustic wave resonator, a centroid of an active area in which the lower electrode, the piezoelectric layer, and the upper electrode all overlap each other is aligned with a center of a rectangle defining an aspect ratio of the active area. The active area has a shape of a polygon symmetrical with respect to at least one axis passing through the center of the rectangle defining the aspect ratio. The aspect ratio is greater than or equal to 2 and less than or equal to 10.

Abstract: A system for distributing washer liquid includes at least one washer pump connected to a reservoir to pressurize the washer liquid, at least one distributor including at least one distribution unit fluidly connected to the washer pump, a plurality of nozzles fluidly connected to the at least one distribution unit in a distributor among the at least one distributor to face a cleaning target, and a controller configured to control opening or closing of the distribution unit formed in the at least one distribution unit and to control pressure of the washer pump.

Abstract: A display device includes a substrate having a display area and a non-display area. A light emitting element is disposed in the display area. An encapsulation layer is configured to cover the display area and encapsulate the light emitting element. A power line is disposed in the non-display area. A first edge of the encapsulation layer in the non-display area is disposed to coincide with an edge of the power line or is disposed closer to the display area than the edge of the power line.