Abstract: The present invention has been made in an effort to provide a preparation method of a positive electrode active material having improved structural stability and electrochemical characteristics by simultaneously coating Mn and B on the surface of a nickel-based lithium metal oxide, and to provide a lithium rechargeable battery including a positive electrode having a positive electrode active material that prepared by such a method.

Abstract: A concentration gradient mode capable of simultaneously achieving a high capacity and a structural stabilization with respect to the nickel-based lithium metal oxide and a doping element capable of appropriately controlling the shape and size of the primary particles are presented.

Abstract: An etchant composition is presented. The composition includes: 18 wt % to 25 wt % of a first organic acid compound; 15 wt % to 20 wt % of a second organic acid compound; 8.1 wt % to 9.9 wt % of an inorganic acid compound; 1 wt % to 4.9 wt % of a sulfonic acid compound; 10 wt % to 20 wt % of a hydrogen sulfate salt compound; 1 wt % to 5 wt % of a nitrogen-containing dicarbonyl compound; 1 wt % to 5 wt % of an amino acid derivative compound; 0.1 wt % to 2 wt % of an iron-containing oxidizing agent compound; and a balance amount of water.

Abstract: The present invention relates to a biopolymer-based hydrogel as a functional biomaterial produced by crosslinking in the presence of a photopolymerization initiator. The hydrogel of the present invention is elastic so as to be adapted to various shapes in both in vivo and in vitro applications. It is biocompatible, achieving maximum effects on wound healing as wound dressing and tissue adhesion preventing material. The present invention also relates to a method for producing the biocompatible hydrogel.

Abstract: A backlight unit including a light guide plate (LGP), a light source module disposed adjacent to an incident surface of the LGP and configured to irradiate light to the incident surface, and a light control member disposed between the light source module and the incident surface, in which the light control member includes a reflection preventing layer disposed adjacent to the light source module and configured to prevent reflection of light, a base substrate disposed on the reflection preventing layer and configured to scatter or diffuse light transmitted through the reflection preventing layer, and a light adjusting filter disposed on the base substrate and configured to filter light including a first wavelength among light provided by the light source module.

Abstract: The inventive concept relates to a chair-type virtual reality controller, wherein the chair-type virtual reality controller includes a seat on which a user is seated, a base on which feet of the user seated on the seat rest, wherein a walking motion of the user is performed on the base; a rotary shaft rotatably coupled to the base such that the seat rotates relative to the base; and a control unit configured to present a VR image to the user based on a rotation motion of a body of the user seated on the seat around the rotary shaft and the walking motion of the user on the base.

Abstract: A cathode active material for a lithium secondary battery is provided which comprises a first region and a second region. The first region is represented by Chemical Formula1 wherein M1, M2 and M3 are constant: Lia1M1x1M2y1M3z1O2+?. The second region is formed around the first regions and is represented by Chemical Formula 2 Lia2M1x2M2y2M3z2M4wO2+?. The concentrations of M1, M2 and M3 are changed from Chemical Formula 1. In both Chemical Formula 1 and 2, M1, M2 and M3 is selected from a group including Ni, Co, Mn and combinations thereof, M4 is selected from a group including Fe, Na, Mg, Ca, Ti, V, Cr, Cu, Zn, Ge, Sr, Ag, Ba, Zr, Nb, Mo, Al, Ga, B and combinations thereof, 0<a1?1.1, 0<a2?1.1, 0?x1?1, 0?x2?1, 0?y1?1, 0?y2?1, 0?z1?1, 0?z2?1, 0<w?0.1, 0.0???0.02, 0<x1+y1+z1?1, 0<x2+y2+z2?1.

Abstract: Disclosed herein is a functional pillow including first and second functional pillows, wherein the first functional pillow includes first and second pillow surfaces having the same quadrangular, the first and second pillow surfaces being coupled to each other along outer edges, wherein the first functional pillow further includes a central flat portion formed at a center thereof without pillow cotton by stitching the surfaces, and first inner cotton disposed between the first and second pillow surfaces and arranged only in a peripheral portion of the first functional pillow, wherein the second functional pillow includes third and fourth pillow surfaces having the same quadrangular shape, the third and fourth pillow surfaces being couple to each other along outer edges, and first and second center lines formed at a center thereof by performing stitching in symmetrical directions, and second inner cotton disposed between the third and fourth pillow surfaces.

Abstract: An apparatus and a method for controlling a motor-driven power steering system can inhibit a change in steering feeling which may be caused by abrasion and degradation of components in the motor-driven power steering system, and maintain initial steering feeling. The method determines a torque compensation amount by comparing a reference value with change ratio average data of steering torque with respect to a steering angle, and compensates for driver input torque in accordance with the determined torque compensation amount, such that it is possible to effectively inhibit the change in steering feeling which may be caused by abrasion and degradation of components, and maintain the initial steering feeling.

Abstract: A display device may include a display panel, at least one light source disposed on one side of the display panel, a circuit board to drive the light source, a light guide plate in which light emitted from the light source is incident into a surface and is emitted to another surface, and a lower frame to support the display panel and to accommodate the light source and the light guide plate. The lower frame may include a base substrate, a digitizer disposed on the base substrate, and a dummy digitizer pattern disposed on the base substrate and spaced apart from the digitizer. The circuit board may be disposed between the digitizer and the dummy digitizer pattern, and the lower frame may be bent and extend around the light source.

Abstract: A method to securely send, to the device the cryptographic key and the local wireless network credentials with an authenticity verification to ensure that the device is safe to be added to the local network. Those credentials are sent using a NFC enabled device to the internal EEPROM with NFC interface embedded on the target connected device. The method enforces the configuration setup process to avoid critical vulnerabilities in IoT devices, minimizing security and privacy issues to the final user and avoid any unauthorized device to be added to the network. When a new IoT device is added, assuming that this new device has no security key embedded and no stored authentication credentials, a secure mobile application will send that information to the device using NFC. This application has an interface to configure the device in a single step.

Abstract: A wavelength conversion member may include a first substrate and a second substrate that overlaps the first substrate. The wavelength conversion member may further include a wavelength conversion layer disposed between the first substrate and the second substrate in a first direction. The wavelength conversion member may further include a first hydrophobic membrane that overlaps at least one of the first substrate, the second substrate, and the wavelength conversion layer in a second direction perpendicular to the first direction.

Abstract: In-line holography to create images of a specimen, such as one or more particles dispersed in a transparent medium. Analyzing these images with results from light scattering theory yields the particles' sizes with nanometer resolution, their refractive indexes to within one part in a thousand, and their three dimensional positions with nanometer resolution. This procedure can rapidly and directly characterize mechanical, optical and chemical properties of the specimen and its medium.

Abstract: An apparatus and a method for controlling a motor-driven power steering system can inhibit a change in steering feeling which may be caused by abrasion and degradation of components in the motor-driven power steering system, and maintain initial steering feeling. The method determines a torque compensation amount by comparing a reference value with change ratio average data of steering torque with respect to a steering angle, and compensates for driver input torque in accordance with the determined torque compensation amount, such that it is possible to effectively inhibit the change in steering feeling which may be caused by abrasion and degradation of components, and maintain the initial steering feeling.

Abstract: A method of updating a scroll bar in a screen of a user terminal according to an embodiment of the present invention may include displaying a chat window including at least a portion of a chat history among users in a first display area of a touch display, displaying a scroll bar in a second display area of the touch display, storing the new chat message in a temporary memory temporarily upon receipt of the new chatting message, adding the new chat message into the chat history in response to a touch event of the user on the touch display, and updating the scroll bar in response to the new chat message being added into the chat history.

Abstract: A method of operating a conversational messaging service may include assigning an identification number to messages transmitted by users participating in a group chat, sequentially, selecting an identification number of any one of messages associated with each of the users as a watermark of each of the users, and determining a number of users failing to read each of the each of the messages, based on the watermark of each of the users.

Abstract: The present disclosure relates to a cathode active material for lithium battery and a method of manufacturing the same, and more specifically relates to a cathode active material for manufacturing lithium battery which is doped by different metal and has gradient concentration and a method of manufacturing the same.

Abstract: A backlight unit including a light guide plate (LGP), a light source module disposed adjacent to an incident surface of the LGP and configured to irradiate light to the incident surface, and a light control member disposed between the light source module and the incident surface, in which the light control member includes a reflection preventing layer disposed adjacent to the light source module and configured to prevent reflection of light, a base substrate disposed on the reflection preventing layer and configured to scatter or diffuse light transmitted through the reflection preventing layer, and a light adjusting filter disposed on the base substrate and configured to filter light including a first wavelength among light provided by the light source module.

Abstract: A light source assembly includes a base substrate, a resin layer disposed on the base substrate, and exposing a portion of the base substrate, and a first light source disposed on the portion of the base substrate which is exposed by the resin layer. The first light source has a hexahedron shape. The first light source has a face in parallel with the base substrate and having a height smaller than length or width of the face.

Abstract: A display device may include a display panel, at least one light source disposed on one side of the display panel, a circuit board to drive the light source, a light guide plate in which light emitted from the light source is incident into a surface and is emitted to another surface, and a lower frame to support the display panel and to accommodate the light source and the light guide plate. The lower frame may include a base substrate, a digitizer disposed on the base substrate, and a dummy digitizer pattern disposed on the base substrate and spaced apart from the digitizer. The circuit board may be disposed between the digitizer and the dummy digitizer pattern, and the lower frame may be bent and extend around the light source.