Abstract: The present specification relates to an optical film, and a display device comprising the same.

Abstract: A Low-voltage DC-DC Converter (LDC) includes a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.

Abstract: The present invention relates to a coolant heater. The purpose of the present invention, a coolant heater which effectively heats coolant of a vehicle by means of a heating unit, is to provide a coolant heater having improved sensitivity and responsiveness to over-heating and assured stability by utilizing a temperature fuse to prevent over-heating. Another purpose of the present invention is to provide a coolant heater having enhanced durability of the temperature fuse coupling part by improving the structure by which the temperature fuse is fixed.

Abstract: A display device includes a display panel, a cover glass disposed on the display panel, and a biometric sensor device disposed below the display panel. The biometric sensor device includes a printed circuit board, a biometric sensor disposed on the printed circuit board, and a housing disposed on the printed circuit board and in which an opening is formed. The biometric sensor is disposed in the opening of the housing and is attached to a surface of the display panel through the housing.

Abstract: An electronic device according to one embodiment of the present invention may comprise: a transparency layer; a pixel layer which is disposed under the transparency layer and comprises a plurality of pixels that can output light in a visible ray band for displaying a content through the transparency layer; a display panel which is disposed under the pixel layer and comprises a substrate layer including a plurality of switches that can operate the plurality of pixels; a bio-sensor which is disposed under at least a part of the display panel and enables acquisition of biometric information by using at least a part of reflected light obtained through reflection, by an external object, of at least a part of light output through at least some pixels among the plurality of pixels; and a coating which reflects external light in an infrared ray band that can be transmitted to the substrate layer and allows transmission of the light in a visible ray band, wherein the coating is formed between the transparency layer an

Abstract: The present disclosure relates to a method and a device for compensating for a luminance deviation, in which test pixel data is written to pixels disposed on a screen of a display panel and an image of the screen is captured, a luminance deviation is determined by analyzing luminance characteristics based on a measured luminance value of each of the pixels, which is obtained from data of the image of the screen captured by an imaging device, and a defective pixel is detected, and compensation data for reducing the luminance deviation between the pixels is derived for each pixel, so that a measured luminance value or compensation data of the defective pixel can be removed.

Abstract: Provided is a new LDC to satisfy the recent requirements for a bidirectional large-capacity isolated LDC (DC-DC converter). The present disclosure provides a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is to possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.

Abstract: The present invention relates to a VOC reduction system and a VOC reduction method that applies pulse type thermal energy to a catalyst to activate the catalyst and oxidizes and removes the VOC.

Abstract: An electronic device includes a narrowband internet of things (NB-IoT) circuit; a shared central processor to control the narrowband internet of things circuit; a shared memory to store data or code from the shared central processor; and a communicator controlled by the shared central processor. The communicator stores the data or the code in the shared memory.

Abstract: The bidirectional insulating DC-DC converter shares high/low voltage terminals, a cooling passage, a housing, and a control board, and two independent step-down circuit (10) and step-up circuit (20) are formed in parallel to perform a bidirectional DC power conversion. A high voltage applied from a high voltage battery HV is stepped down through the step-down circuit (10) and output to a low voltage battery LV. On the other hand, a low voltage applied from the low voltage battery LV is stepped up through the step-up circuit (20) and output to the high voltage battery HV. The step-down circuit (10) is formed as an active clamp forward converter circuit, and the step-up circuit (20) is formed as an active clamp flyback converter circuit.

Abstract: A method for manufacturing a lower case of a battery module includes an extrusion molding operation in which a metal material is extruded to mold a cooling plate member and a sidewall member of a battery module; a forging operation in which an internal surface of the cooling plate member is pressed with a punch, having an edge of a lower end provided vertically to form an accommodation groove; and a forming operation in which an embossed piece, protruding to an external surface of the cooling plate member by forming the accommodation groove, is removed.

Abstract: The present disclosure is for minimizing the parasitic resistance of an output capacitor of a low-voltage DC-DC converter (LDC) proposed to improve a lifespan of a battery and increase efficiency of the DC-DC converter through reduction of an equivalent series resistance (ESR) of an output capacitor in an N-phase interleaving type vehicle DC-DC converter. According to the present disclosure, the LDC includes: an N-phase power circuit configured by connection of N DC-DC converters in parallel between a high-voltage (HV) battery and a low-voltage (LV) battery; and one output capacitor commonly connected to an output of each phase DC-DC converter, wherein each phase of the N-phase power circuit is controlled in an interleaving manner which delays a phase by 360°/N. Here, each N-phase power circuit is controlled by switching at a frequency of [(a frequency at which the parasitic resistance (equivalent series resistance (ESR)) of the output capacitor is minimized)/N].

Abstract: The present disclosure relates to a new bidirectional low voltage DC-DC converter (LDC), that is, a DC-DC converter capable of satisfying a safety level required for an eco-friendly vehicle and an autonomous vehicle and improving power conversion performance, and a method and an apparatus for controlling the same. The LDC proposed in the present disclosure is a new concept bidirectional LDC in which a plurality of converters having the same power circuit topology are subjected to a parallel interleaving operation so as to enable both a buck operation and a boost operation, satisfy a high safety level, and improve power conversion performance. To this end, a plurality of bidirectional active-clamp flyback converters (for example, two or more bidirectional active-clamp flyback converters) are connected in parallel and are interleaved and controlled by a controller (for example, a microcomputer).

Abstract: An aspect of the present disclosure provides a bus bar as a winding in a core of a transformer includes multiple sub-bars arranged horizontally and connected in parallel so as to minimize an AC current in the transformer, and the sub-bars have different widths and thus resistances or impedances with respect to a current flowing through the sub-bars are the same. Another aspect of the present disclosure provides a method of designing a bus bar for resistance or impedance matching between multiple sub-bars included in the bus bar to share a current to minimize an AC current in the transformer. Another aspect of the present disclosure provides a transformer, for a DC-DC converter for use in a vehicle, which is manufactured by the method of designing a bus bar.

Abstract: Provided is an electro-magnetic compatibility (EMC) filter including a lower bobbin having a U-shaped cross-sectional shape, a lower core including a magnetic material having a U-shaped cross-sectional shape and disposed on the lower bobbin, a bus bar disposed on the lower core, an upper bobbin having a hollow inside, having a hexahedral shape with one side open, and configured to cover an upper portion of the lower bobbin, and an upper core including a magnetic material having a plate-like shape, disposed in an internal space of the upper bobbin, and disposed on the lower core (U core) to cover the bus bar with a gap maintained by the bus bar between the upper and lower cores when the lower bobbin and the upper bobbin are coupled to each other.

Abstract: A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.

Abstract: A display device includes a display panel, a cover glass disposed on the display panel, and a biometric sensor device disposed below the display panel. The biometric sensor device includes a printed circuit board, a biometric sensor disposed on the printed circuit board, and a housing disposed on the printed circuit board and in which an opening is formed. The biometric sensor is disposed in the opening of the housing and is attached to a surface of the display panel through the housing.

Abstract: A solenoid actuator includes a casing body having a receiving space defined therein; a casing cover coupled to the casing body, wherein the casing cover includes a connector for transmission of power and signal; a bobbin assembly installed in the receiving space; a core coupled to and extending through the bobbin assembly, wherein the core has a working space defined therein; a housing surrounding a lower end of the core protruding out of the bobbin assembly; a plunger movably installed in the working space; and a rod coupled to and extending through the core, wherein the rod moves under movement of the plunger. The bobbin assembly includes a bobbin terminal, and the casing cover includes a connector terminal, wherein when the casing cover is coupled to the casing body, the connector terminal is connected to the bobbin terminal.

Abstract: The present disclosure relates to a high electric power density bidirectional isolated low voltage DC-DC converter (LDC) assembly, in which a large-capacity bidirectional isolated LDC circuit is packaged in consideration of a flow of electric power so as to use components in common and minimize an internal dead space, and a cooling structure thereof. LDC assembly includes a power board subassembly (100) including the high voltage stage, a part of the buck circuit, and the boost circuit; a transformer subassembly (200) including a transformer of the buck circuit; an output power board subassembly (300) including a part of the buck circuit; and an EMC filter subassembly (400) including an EMC filter included in the low voltage stage.

Abstract: An electronic device is provided. The provided electronic device includes: a display; a communication module capable of communicating with an external server; a processor configured to control the communication module and the display; and a memory electrically connected to the processor, wherein, when the electronic device is executed, the memory includes instructions for the processor to control the communication module to transmit identification information of the electronic device to the external server, control the communication module to receive, from the external server, user identification information generated by the server in response to the identification information of the electronic device, control the display to display a purchase list generated based on the user identification information, and control the display to display a user interface through which payment for the purchase list is possible, based on a user input for confirming the purchase list. Other various embodiments are possible.