Abstract: A method for securing the program safety of an HVDC system according to the present invention comprises the steps of: calculating, by a controller of the HVDC system, a BIOS program eigenvalue after loading a BIOS when power is applied; receiving, by the controller, a BIOS program eigenvalue of the controller prestored in a higher system of the controller; and comparing the BIOS program eigenvalue calculated in the controller and the BIOS program eigenvalue prestored in the higher system so as to identify whether or not the eigenvalues are identical and, if the eigenvalues are not identical, stopping execution of a program and notifying the higher system that the eigenvalues are not identical.

Abstract: Disclosed herein is a virtual reality control system including a large space, a head-mounted display (HMD) worn on a body of a user and configured to output an image, a tracking device disposed on at least a part of the body of the user, a plurality of optical camera sensors disposed in the large space, and a server which stores content information on a specified scenario, wherein the server can acquire first location information on a first user on the basis of first sensor data on the HMD, which is acquired through the plurality of optical camera sensors, acquire second location information on at least a part of a body of the first user on the basis of second sensor data on the tracking device, which is acquired through the plurality of optical camera sensors, convert the first location information and the second location information to acquire content change information, and control the HMD to output an image on the basis of the content change information.

Abstract: According to embodiments, there is provided a virtual reality control system including: a sensor configured to detect an optical signal by emitting light to a target object and receiving light; a first display configured to output an image to a first user who uses a play space; a second display configured to output an image to a second user who uses the play space; and at least one or more controllers configured to control at least one of the first display and the second display, wherein the controller is configured to: acquire first position data of the first user and second position data of the second user, based on the optical signal; output an image to the first display based on the first position data; control the first display and the second display in a walk-through mode and a locomotion mode.

Abstract: Disclosed herein is a virtual reality control system including a large space, a head-mounted display (HMD) worn on a body of a user and configured to output an image, a tracking device disposed on at least a part of the body of the user, a plurality of optical camera sensors disposed in the large space, and a server which stores content information on a specified scenario, wherein the server can acquire first location information on a first user on the basis of first sensor data on the HMD, which is acquired through the plurality of optical camera sensors, acquire second location information on at least a part of a body of the first user on the basis of second sensor data on the tracking device, which is acquired through the plurality of optical camera sensors, convert the first location information and the second location information to acquire content change information, and control the HMD to output an image on the basis of the content change information.

Abstract: A virtual reality control system comprises: a sensor configured to detect an optical signal by emitting light to a target object and receiving light; a first display configured to output an image to a first user who uses a play space; a second display configured to output an image to a second user who uses the play space; and at least one or more controllers configured to control at least one of the first display and the second display, wherein the controller is configured to: allocate a first safe area to the first user and allocate a second safe area to the second user in order to prevent a collision between the first user and the second user; and output a collision prevention guide when the second user leaves the second safe area.

Abstract: A power control device of a display apparatus includes a display panel configured to include a plurality of pixels, a panel driver configured to drive the display panel, a power control unit configured to output a power control signal into which one or more pieces of control command data are encoded, and a power source unit configured to shift an output level of a source voltage needed for an operation of each of the display panel and the panel driver, based on the control command data, wherein the control command data comprises a plurality of control pulses where a logic low period and a logic high period are alternated, and the logic low period is implemented with two or more different lengths.

Abstract: The present invention relates to a system for variably controlling a sampling frequency, which facilitates the setting of sampling frequencies according to the types of various voltage/current transformers and stably collects sampling outputs of different sampling frequencies of various voltage/current transformers without collisions. The system for variably controlling a sampling frequency according to the present invention includes: a secondary converter, which collects analog data from a first sensor and converts the analog data into digital data; and a merging unit which collects analog data from a second sensor and converts the analog data into digital data while collecting the output of the secondary converter.

Abstract: Disclosed is a display device and a driving method thereof, and a mobile terminal. The display device includes a display panel on which a plurality of data lines, a plurality of gate lines, and a plurality of pixels to which a pixel driving voltage is supplied are disposed, a display panel driving circuit configured to scan the plurality of pixels and write pixel data to the plurality of pixels during a refresh frame period of a refresh frame; and a power circuit configured to output a pixel driving voltage and decrease the pixel driving voltage in a skip frame period of a skip frame in which scanning of the plurality of pixels is skipped.

Abstract: The present invention relates to a method and apparatus for holographic recording based on holographic printing technology, and more specifically, to a method and apparatus for holographic recording, in which the hologram is recorded after the deviation in diffraction efficiency for each hogel is pre-compensated for by varying the intensity (luminance) of the object beam for each hogel during the hologram recording in response to a deviation in diffraction efficiency (reconstruction efficiency) for each hogel of a holographic recording surface that occurs when the hologram is reproduced. Accordingly, the reproduction imbalance of a near-eye display (NED) using a holographic optical element (HOE) is resolved by controlling the diffraction efficiency uniform on the entire holographic recording surface when the hologram is reproduced.

Abstract: A pixel circuit, a display device, and a mobile terminal including the display device are disclosed. The pixel circuit includes one or more first switch elements configured to be turned on in response to a first gate signal; one or more second switch elements configured to be turned on in response to a second gate signal; one or more third switch elements configured to be turned on in response to a third gate signal; an internal gate signal generator configured to receive the first gate signal and the second gate signal to output the third gate signal; and a driving element configured to drive a light emitting element.

Abstract: The present invention relates to a cosmetic composition comprising carnitine-salicylate (CA-SA) as an active ingredient. In addition, the composition of the present invention, as a result of having CA-SA as the active ingredient, has been confirmed to alleviate acne and exfoliate dead skin cells as a skin improving substance while simultaneously alleviating inflammation and erythema as a skin soothing substance, due to ion pairing of carnitine and salicylate in mildly acidic conditions.

Abstract: Disclosed in the present invention is a floating hologram system. The floating hologram system includes a diffuser configured to form a projection image using light beams transmitted from an image transmitter and diffuse the formed image, and a holographic optical element on which the image diffused from the diffuser is incident and which generates a virtual image floating at a position a predetermined distance therefrom and has a convex lens characteristic. A distance between the diffuser and the holographic optical element is determined based on a focal length of the holographic optical element and a distance from the holographic optical element to the virtual image.

Abstract: The present invention relates to a solder resist composition, and more specifically, to: a solder resist composition that can be used to obtain high reflectance, excellent yellowing resistance, excellent crack resistance, high resolution and flatness, excellent sensitivity, developability, adhesion, solder heat resistance, pencil hardness, solvent resistance, HAST resistance, and high reflectance and high gloss after a HAST test; a dry film and a printed wiring board which include a solder resist layer obtained therefrom; and methods for manufacturing same.

Abstract: A thermoplastic resin composition of the present invention comprises about 100 parts by weight of a rubber-modified aromatic vinyl-based copolymer resin; about 5 to about 25 parts by weight of a polyetheresteramide block copolymer; about to about 1.5 parts by weight of a silver (Ag)-based compound; and about 1 to about 15 parts by weight of zinc oxide, wherein the weight ratio of the polyetheresteramide block copolymer and the sum of the silver-based compound and the zinc oxide (polyetheresteramide block copolymer: silver-based compound+zinc oxide) is about 1:0.1 to about 1:2. The thermoplastic resin composition has excellent antiviral properties, weather resistance, impact resistance, and the like.

Abstract: A thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a rubber-modified aromatic vinyl-based copolymer resin containing a diene-based rubber-modified vinyl-based graft copolymer, an acrylic rubber-modified vinyl-based graft copolymer, a large-particle diameter rubber copolymer having an average particle diameter of about 5 to about 10 p m, and an aromatic vinyl-based copolymer resin; about 5 to about 25 parts by weight of a polyetheresteramide block copolymer; about 0.05 to about 1.5 parts by weight of a silver (Ag)-based compound; and about 1 to about 15 parts by weight of zinc oxide, wherein the gloss degree of a 3.2-mm thick sample is about 40 to about 70%, as measured at an angle of 600 according to ASTM D523. The thermoplastic resin composition is excellent in low gloss, antiviral properties, weather resistance, impact resistance, and so on.

Abstract: A semiconductor package manufacturing apparatus is provided, which comprises a pin holder including a plurality of through holes, a plurality of ejector pins corresponding to the plurality of through holes, a first pin disk including a first protrusion pattern having a first arrangement configured to adjust heights of the plurality of ejector pins, a second pin disk including a second protrusion pattern having a second arrangement configured to adjust the heights of the plurality of ejector pins, and a controller configured to select at least a portion of the plurality of ejector pins to protrude toward an upper portion of the pin holder by selecting one of the first and second pin disks.

Abstract: A laser dicing device includes: a Gaussian laser beam emitter configured to emit a Gaussian laser beam having a Gaussian energy distribution; a laser beam modulator configured to modulate a shape of the emitted Gaussian laser beam by reducing intensity in a region surrounding a first line parallel with a laser dicing direction of the emitted Gaussian beam, the first line crossing a center of the Gaussian laser beam in a plan view; a focusing lens configured to focus a modulated Gaussian laser beam modulated by the laser beam modulator; and a substrate support configured that a substrate to be diced is seated on the support, wherein the focusing lens is configured to collect the modulated Gaussian laser beam inside the substrate seated on the substrate support.

Abstract: A cooking appliance and a roasting assembly configured to be removably mounted within such cooking appliance are provided. The roasting assembly includes a pan defining an internal volume. The pan is configured to be rotatably mounted on a floor of a cooking chamber of the cooking appliance. The roasting assembly also includes a stirrer rod positioned within the internal volume of the pan. The stirrer rod is configured to be coupled to a rotating hub of the cooking appliance whereby the stirrer rod rotates with the rotating hub. The pan rotates at a first speed and the stirrer rod rotates at a second speed different from the first speed.

Abstract: A microwave oven is provided having a cabinet defining a cooking chamber, a door pivotably attached to the cabinet and a button for opening the door. The door may be configured to selectively allow entry to the cooking chamber. The button may include an outer panel and a primary body. The outer panel may be moveable between a locked position and an unlocked position. The primary body may be located below the outer panel. The primary body may be accessible in the unlocked position. The button may further include a spring, the spring in biased engagement with the outer panel. The spring may motivate the outer panel to the locked position.

Abstract: The invention relates to a method includes selecting a plurality of call-related icons on a first display in a folded state and switching the mobile phone to an open state, a screen of the second display is divided according to the number of call-related icons selected by the user, and each application corresponding to the selected call-related icon is displayed on the divided second display.