Abstract: A method of controlling a Bluetooth connection on a Bluetooth host device, the method including detecting a Bluetooth connection event; identifying a connection mode supported by a connection target device, between a first connection mode and a second connection mode; when the connection target device supports both the first connection mode and the second connection mode, registering first connection information corresponding to the first connection mode and second connection information corresponding to the second connection mode; when the connection target device supports the second connection mode registering the second connection information corresponding to the second connection mode; and identifying a current mode indicating a current Bluetooth connection mode, selecting one connection mode from the first connection mode or the second connection mode considering the current mode and the connection mode supported by the connection target device, and establishing a connection with the connection target de

Abstract: A system-on-chip includes a low-dropout (LDO) regulator configured to regulate a voltage of input power and to supply operation power to a core through an output mode, the core configured to receive the operation power to perform an operation, and a power supply circuit configured to supply the input power to the LDO regulator. The power supply circuit may receive first power and second power having different voltage characteristics, and may supply third power, which is power having a higher voltage of the first power and the second power, and the second power to the LDO regulator as the input power.

Abstract: An operation method of a terminal includes receiving a synchronization signal from a first satellite in a first satellite group that includes first satellites, the first satellite group supporting plural radio access technologies (RATs), performing a higher layer signaling procedure with the first satellite, based on the synchronization signal, transmitting, based on the higher layer signaling procedure, to the first satellite, first channel status information regarding a second satellite group including second satellites from among the first satellites, the second satellite group supporting a RAT supported by the terminal, and performing wireless communication with a satellite in the second satellite group that is configured as a primary satellite, based on the first channel status information.

Abstract: Embodiments provide a light-emitting device, an electronic device including the light-emitting device, and an electronic apparatus including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer and an electron transport between the emission layer and the second electrode, and the emission layer includes a first emitter, and the electron transport region includes a heterocyclic compound, wherein the first emitter and the heterocyclic compound are explained in the specification.

Abstract: Disclosed is a mobile robot including a main body, a plurality of antennas in the main body, and at least one processor configured to: receive, through the plurality of antennas, a communication signal from the charging station, obtain information about a distance between the charging station and the mobile robot and information about a direction from the mobile robot to the charging station based on the received communication signal, receive information about a position of the charging station from the charging station, and control docking of the mobile robot at the charging station based on the obtained information about the distance between the charging station and the mobile robot, the obtained information about a direction from the mobile robot to the charging station, and the received information about a position of the charging station.

Abstract: A cooking apparatus including a cooktop including an inlet; a chamber housing to which a duct is connectable, the chamber housing coupled to the cooktop to form a chamber under the inlet; and a fan device inside the chamber housing, the fan device including a fan and a fan housing, the fan housing including a first housing inlet opening towards the cooktop, and a second housing inlet opening in an opposite direction, wherein the fan device is operable to, with the duct being connected to the chamber housing, draw air through the inlet into the chamber, so that some of the air drawn into the chamber is drawn through the first housing inlet into the fan housing, and other of the air drawn into the chamber is drawn through the second housing inlet into the fan housing, and discharge the air in the fan housing through the duct.

Abstract: An air conditioner including an indoor controller configured to receive an operation command from a user, and generate a plurality of first communication signals corresponding to the operation command; an outdoor unit; and a main controller configured to connect to the indoor controller and the outdoor unit, receive the plurality of first communication signals, and convert the plurality of first communication signals into a single second communication signal by combining the plurality of first communication signals, and transmit the single second communication signal to the outdoor unit to control operation of the outdoor unit. The outdoor unit is configured to receive the single second communication signal, and operate based on the single second communication signal.

Abstract: A control method for a refrigerator includes: obtaining an input image generated by photographing an inner space of the refrigerator; with respect to one or more objects recognized from the input image, obtaining object information including a type and a position of the one or more objects, respectively; by using an ultra-wide band (UWB) module included in the refrigerator, detecting a UWB signal output from a UWB device while the UWB device is arranged inside the refrigerator; based on the detected UWB signal, identifying a position of the UWB device; identifying an object which is located around the UWB device, from among the one or more objects recognized from the input image, based on the identified position of the UWB device; and outputting the object information with respect to the object identified as being located around the UWB device as an audio signal.

Abstract: Provided are a polymer nanoparticle, a method of preparing the polymer nanoparticle, and a polishing slurry including the polymer nanoparticle are provided, where the polymer nanoparticle including a mixture of a hydrophobic polymer and a copolymer including both hydrophobic and hydrophilic groups, the hydrophilic group of the copolymer is disposed on an outer surface of the polymer nanoparticle.

Abstract: A system includes a storage device, a first device, and a second device. The first device stores a first secret key and a first public key. The second device stores a first key and a second key and receives the first public key, generates a first ciphertext for an updated software image and the second key, based on the first key, and generates a second ciphertext for the first ciphertext and the second key, based on the first public key. The first device obtains the first ciphertext and the second key by decrypting the second ciphertext and provides the first ciphertext and the second key to the storage device. The storage device obtains the updated software image and the second key by decrypting the first ciphertext. The first device provisions, based on the second key, a certificate for a unique key of the storage device into the storage device.

Abstract: A light source apparatus includes: a light source including a light emitting diode and an optical dome covering the light emitting diode; and a substrate supporting the light source, wherein the substrate may include: a conduction layer that is electrically conductive; a first protective layer disposed on the conduction layer and on which the optical dome is disposed, the first protective layer including a first exposed portion exposing a portion of the conduction layer to connect the conduction layer and the light emitting diode; and a second protective layer disposed on the first protective layer, the second protective layer including a second exposed portion exposing a portion of the first protective layer at which the optical dome is disposed on the first protective layer.

Abstract: A controller of a storage system, includes a plurality of modules each including an intellectual property (IP) module and a core module, wherein, based on the IP module operating as a master for a first module of the plurality of modules, an idle clock of the first module is a first clock, wherein based on the core module operating as a master for a second module of the plurality of modules, an idle clock of the second module is a second clock, wherein a clock frequency of the first clock is greater than zero and smaller than a maximum clock frequency, and wherein a clock frequency of the second clock is zero.

Abstract: A clock signal generator includes a power voltage providing circuit configured to provide a power voltage changing according to a temperature based on a temperature coefficient, a first reference voltage providing circuit configured to provide a first reference voltage based on an internal power voltage, and a clock signal generating circuit configured to generate a clock signal based on the power voltage and the first reference voltage.

Abstract: A method of processing exception events for a storage device includes generating, by the storage device, a first exception event alert comprising a first value and a second value, where the first value indicates generation of exception events and the second value indicates attributes of the exception events, and transmitting, from the storage device, the first exception event alert to a host device.

Abstract: A method and apparatus for transmitting data based on peripheral component interconnect express (PCIe) are disclosed. The method includes receiving, at an endpoint (EP), a doorbell (DB) message transmitted from a root complex (RC) via a PCIe connection between the endpoint (EP) and the RC; based on the DB message, transmitting, by polling of a processor of the EP, a read request message to a direct memory access (DMA) controller of the EP; and in response to reception of the read request message by the DMA controller, reading, by the DMA controller, data to be transmitted from a memory of the RC and recording read data into a memory of the EP.

Abstract: A display apparatus includes: a display panel; and a light source device configured to provide light to the display panel, wherein the light source device may include: an optical member; a substrate including a first side facing the display panel and the optical member; a light source provided on the first side of the substrate; a driving element provided on the first side of the substrate and configured to drive the light source; a plurality of lines provided on the first side of the substrate, the plurality of lines including a first line and a second line that is connected to the driving element; and a jumper supporter provided on the first side of the substrate in an area where the first line intersects the second line, the jumper supporter being configured to support the optical member, to electrically connect the first line, and to guide the second line to be spaced apart from the first line.

Abstract: A storage device is provided. The storage device includes: a plurality of memory devices configured to output status data indicating a busy state indicating an internal operation is being performed or a ready state; and an interface circuit configured to receive a command for reading the status data of the plurality of memory devices, receive the status data of each of the plurality of memory devices from the plurality of memory devices, and output entire status data indicating statuses of the plurality of memory devices based on the status data of each of the plurality of memory devices.

Abstract: According to the disclosure, a display apparatus includes a printed circuit board (PCB), a light emitting diode (LED) chip mounted on the PCB and configured to emit light, an optical dome formed to enclose the LED chip by being dispensed on the LED chip, and a liquid crystal panel configured to block or pass light output from the LED chip, wherein the optical dome may be formed to satisfy 1.70<r1/r0<1.83 where r0 is a straight distance for light vertically emitted from the LED chip to reach a surface of the optical dome and r1 is a straight distance for maximum output light emitted from the LED chip to reach the surface of the optical dome.

Abstract: A moving robot including a main body; a plurality of wheels configured to rotate to move the main body; a blade provided to the main body and configured to be rotatable to cut grass; and at least one processor configured to obtain alignment direction information of a pattern by which the main body is movable based on pattern information and shape information of a work area, generate travel path information based on the obtained alignment direction information of the pattern, control the plurality of wheels to rotate to move the main body based on the generated travel path information, and control the blade to rotate to cut grass based on the generated travel path information.

Abstract: Provided is a system configured to respectively allocate a plurality of deep neural networks to a plurality of processing units according to a particular action having maximum quality in a particular state. In addition, provided is a system configured to respectively allocate a plurality of deep neural networks to a plurality of processing units according to an action having maximum quality in a current state, and to update quality of an action selected in the current state by using a calculated reward based on a process of the plurality of deep neural networks by the allocated plurality of processing units.

Abstract: An optical scanner includes at least one light source configured to emit light, a steering unit configured to perform scanning in a first direction based on the light emitted from the at least one light source, and a polygon mirror configured to perform, by using the light output from the steering unit, scanning in a second direction different than the first direction based on a rotation of the polygon mirror. The steering unit includes a plurality of first prisms, and each of the plurality of first prisms includes an incident facet configured to pass the light emitted from the at least one light source, and an output facet configured to refract and output the light. The polygon mirror includes a plurality of reflective facets, and each of the plurality of reflective facets is configured to that reflect the light output from the steering unit.

Abstract: Disclosed is a method and apparatus for processing a radar signal by correcting a phase distortion. The method includes generating radar data based on a radar transmission signal transmitted through an array antenna of a radar sensor based on a frequency modulation model and a radar reception signal received through the array antenna as the radar transmission signal is reflected by a target, correcting the radar data using a correction vector for correcting a feedline error occurring due to a feedline delay difference between channels of the array antenna, and estimating a direction of arrival corresponding to the corrected radar data using a direction matrix reflecting a phase shift of the corrected radar data according to frequency modulation characteristics of the frequency modulation model.

Abstract: A device includes: an operation module configured to store and operate a weight for an operation of a layer of a neural network model; a control module configured to generate setting information for performing the operation of the layer by the neural network model using the stored weight; an input module configured to receive input data for the operation of the layer based on the generated setting information; a merging module configured to receive operation results of the operation of the layer from the operation module and merge the received operation results of the layer; a post-processing module configured to receive the merged operation results of the layer from the merging module and post-process the received merged operation results of the layer; and an output stream module configured to convert and store the post-processed operation results based on the generated setting information.

Abstract: A lens assembly includes a lens barrel having an outer diameter increasing from a subject side to an image side, and a ring member disposed on an outer circumferential surface of the lens barrel.

Abstract: A multilayer electronic component includes a body including a plurality of dielectric layers and a plurality of internal electrodes alternately disposed with the plurality of dielectric layers in a first direction, and an external electrode disposed on the body. One of the plurality of internal electrodes includes Ni and In. In the one of the plurality of internal electrodes, among points 10 nm away from an interface with one of the plurality of dielectric layers, a ratio of points at which a molar ratio of In/(Ni+In) is 0.002 or more is 70% or more, and among central points in the first direction, a ratio of points at which the molar ratio of In/(Ni+In) is 0.002 or more is 35% or less.

Abstract: A lens module includes a first lens barrel in which at least one lens is disposed and including a first threaded portion and a first stepped portion on an outer circumferential surface of the first lens barrel; and a second lens barrel in which at least one lens is disposed and including a second threaded portion and a second stepped portion on an inner circumferential surface of the second lens barrel, wherein the first lens barrel and the second lens barrel are coupled to each other by fitting the first stepped portion and the second stepped portion to each other and screwing the first threaded portion and the second threaded portion to each other.

Abstract: In a multilayer electronic component according to an aspect or another aspect of the present disclosure, a protective layer including a plurality of oxides having a wired form is disposed on at least a portion of an external surface of a body. Alternatively or optionally, the protective layer including an oxide having a wired form is disposed on at least a portion of a space between the body and a side margin portion. A surface of the multilayer electronic component has superhydrophobicity, thereby improving moisture resistance reliability of the multilayer electronic component.

Abstract: A semiconductor device may include a substrate including an active pattern, a source/drain pattern on the active pattern, an active contact on the source/drain pattern; a lower power line in the substrate, a lower contact that vertically connects the active contact to the lower power line, a conductive layer between the lower contact and the lower power line, and a power delivery network layer on a bottom surface of the substrate. The conductive layer may include silicon (Si) and a first element. The first element may include a transition metal or a metalloid. A concentration of the first element may decrease in a direction from the lower contact toward the lower power line.

Abstract: An ultrasound imaging disclosure according to an embodiment of the present disclosure relates to an ultrasound imaging apparatus configured to irradiate ultrasonic waves to an object to which an ultrasonic contrast agent is administered, receive an echo signal reflected from the object, and analyze a contrast enhanced ultrasound image for the object, the ultrasound imaging apparatus including an image processor configured to set a region of interest in the ultrasound image, and generate a time intensity curve representing brightness of each frame of the ultrasound image within the set region of interest and a curve fitting model representing a tendency of the time intensity curve according to a predetermined mathematical model.

Abstract: A display apparatus includes a substrate including a display area and a non-display area, an organic insulating layer on the substrate, a first sub-pixel electrode on the organic insulating layer in the display area, a conductive bank layer including a first opening overlapping the first sub-pixel electrode, and a first conductive layer and a second conductive layer having different etch selectivities from each other, an insulating layer between the first sub-pixel electrode and the conductive bank layer, the insulating layer including an opening overlapping the first opening, a first intermediate layer on the first sub-pixel electrode, a first opposite electrode on the first intermediate layer, and a first inorganic barrier layer on the first opposite electrode. The conductive bank layer includes an inner exhaust opening around the first opening and overlapping the organic insulating layer, and the insulating layer includes an exhaust opening overlapping the inner exhaust opening.

Abstract: A method includes: inserting new pixels between original pixels for each of maps included in a first geometry buffer (or G-buffer) generated from a frame, wherein the maps represent geometric information of a three-dimensional (3D) model of an object included in the frame; generating a second G-buffer by setting values of the new pixels using a motion vector map that may be one of the maps; generating a third G-buffer by combining, with the second G-buffer, a result of updating only values of pixels masked based on an output of a pixel masking neural network to which the second G-buffer may be input; generating a fourth G-buffer by updating values of pixels by inputting the third G-buffer to a G-buffer reconstruction neural network; and update, based on the fourth G-buffer, the resolution of a subsequent frame that follows the frame.

Abstract: Disclosed is a magnetic memory device including a pinned magnetic pattern and a free magnetic pattern that are sequentially stacked on a substrate, a tunnel barrier pattern between the pinned magnetic pattern and the free magnetic pattern, a top electrode on the free magnetic pattern, and a capping pattern between the free magnetic pattern and the top electrode. The capping pattern includes a lower capping pattern, an upper capping pattern between the lower capping pattern and the top electrode, a first non-magnetic pattern between the lower capping pattern and the upper capping pattern, and a second non-magnetic pattern between the first non-magnetic pattern and the upper capping pattern. Each of the lower capping pattern and the upper capping pattern includes a non-magnetic metal. The first non-magnetic pattern and the second non-magnetic pattern include different metals from each other.

Abstract: A memory controller manages a refresh. The memory controller is configured to communicate with a memory device including a memory cell array that include of a plurality of word lines may include a scheduler configured to control commands provided to the plurality of word lines, an error correction code engine that has a register including N entries and is configured to store, in the register, a first parameter which includes address information and active number information of N word lines among the plurality of word lines based on counting the number of actives of the plurality of word lines, a comparator configured to compare the first parameter with a threshold parameter, and a refresh management (RFM) decision circuit configured to determine refresh frequency of the plurality of word lines based on results output from the comparator and to generate an RFM command.

Abstract: A memory system includes: a memory device including a memory cell array and a control circuit; and a temperature sensor configured to measure a temperature of the memory device to generate a temperature value, wherein the control circuit is configured to: set a compensation sensing parameter based on the temperature value, determine a sensing parameter by applying the compensation sensing parameter to a basic sensing parameter corresponding to a read mode among a plurality of read modes having different read speeds, and read data from the memory cell array based on the sensing parameter.

Abstract: An integrated circuit may include gate electrodes including first and second gate electrodes being apart in a first direction and third and fourth gate electrodes being apart in the first direction. The second and third gate electrodes receive a first control signal, and the first and fourth gate electrodes receive a second control signal. The integrated circuit further includes a first drain region between the first and second gate electrodes and a second drain region between the third and fourth gate electrodes, wherein the first and second drain regions are electrically connected to each other. The integrated circuit includes a front-side wiring layer connected to at least one of the first and second drain regions and the first to fourth gate electrodes, and a backside wiring layer connected to at least another one of the first and second drain regions and the first to fourth gate electrodes.

Abstract: A method (1300) and system (201) for generating an astro-lapse video on a user device is disclosed. Initially, at least one current frame comprising one or more stars, is captured via the user device. Further, region(s) with a degree of exposure and focus greater or less than a predefined threshold are determined and a set of subsequent frames including the stars are captured. The exposure and focus of region(s) in the subsequent frames is corrected during the capturing based on degree of exposure and focus of the region(s) within the current frame. Further, fusion weights of the current and subsequent frames are determined based on one or more cloud categories and associated cloud density scores. Finally, an astro-lapse video is generated by fusing the at least one current frame and the set of subsequent frames based on the determined fusion weights.

Abstract: A semiconductor device includes an active pattern extending along a first direction, and first and second word lines intersecting the active pattern. The active pattern includes a center active portion between the first and second word lines. The center active portion includes a center portion extending from the first word line to the second word line, a first center protrusion protruding from one side surface of the center portion in a second direction intersecting the first direction, and a second center protrusion protruding from another side surface of the center portion in an opposite direction to the second direction. The first center protrusion extends from the first word line along the first direction. The second center protrusion extends from the second word line along an opposite direction to the first direction.

Abstract: According to an embodiment of the disclosure, the method may include detecting the at least one real-world object, detecting an occurrence of an event associated with the at least one real-world object in proximity of an user in a real world, predicting at least one user action in the real world subsequent to the occurrence of the event based on a movement of an user in the real world for interacting with the at least one real world object and generating an overlay of the at least one real-world object within the ongoing virtual session based on a position of at least one real world object and a position of the user.

Abstract: An image sensor includes a sensor substrate including first to third pixel groups, and a color separation lens array configured to separate incident light according to wavelengths, multi-condense blue light onto a plurality of continuously arranged first pixels of the first pixel group, multi-condense green light onto the plurality of continuously arranged second pixels of the second pixel group, and multi-condense red light onto the plurality of continuously arranged third pixels of the third pixel group. The color separation lens array includes first to third pixel correspondence regions respectively facing the first to third pixel groups and including a plurality of nanoposts. A blue light phase profile viewed in a cross-section immediately after passing through the first pixel correspondence region includes a plurality of maximum points having positions that are not aligned with a center of the plurality of first pixels.

Abstract: Embodiments provide an organometallic compound, a light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device.

Abstract: The present disclosure relates to fan-out semiconductor packages and a methods for manufacturing the same. A fan-out semiconductor package includes a substrate including a cavity, a semiconductor die within the cavity and including a plurality of connection terminals at a bottom surface thereof, a dummy die at a fan-out region within the cavity and including a plurality of through silicon vias (TSVs), a filler filling an empty space within the cavity, and a lower redistribution layer on bottom surfaces of the substrate, the semiconductor die, and the dummy die, and electrically connected to at least some of the plurality of connection terminals of the semiconductor die and the plurality of through silicon vias of the dummy die, and an upper redistribution layer on top surfaces of the substrate, the semiconductor die, and the dummy die, and electrically connected to the plurality of through silicon vias of the dummy die.

Abstract: A semiconductor memory device includes a stack structure on a substrate, extending in a first direction, and including gate electrode layers and insulating layers stacked alternately with each other, a vertical structure including a vertical channel film extending in a second direction crossing the first direction and a channel insulating film disposed on the vertical channel film and having first areas adjacent to the insulating layers and second areas adjacent to the gate electrode layers, and a high-k film on the channel insulating film. The high-k film includes a first high-k metal oxide film between the first areas and the insulating layers and in contact with the first areas and a second high-k metal oxide film between the second areas and the gate electrode layers and in contact with the second areas, and the first and second high-k metal oxide films include different metal materials.

Abstract: A multilayer electronic component includes a body including a dielectric layer and internal electrodes, and including first and second surfaces, third and fourth surfaces, fifth and sixth surfaces, external electrodes disposed on the third and fourth surfaces, and side margin portions disposed on the fifth and sixth surfaces. The side margin portions include a first region adjacent to the internal electrodes and a second region adjacent to outside of the side margin portions. In a Raman spectra obtained by analyzing one point located in the first and second region respectively, peak X appears in a Raman shift of 450 cm?1 to 600 cm?1. When a minimum value of the Raman shift at which the peak X appears in the Raman spectra of the first region is ?(cm?1), a minimum value of the Raman shift at which the peak X appears in the Raman spectra of the second region is ?+0.75 cm?1 or greater.

Abstract: A pixel of a display device includes a first transistor including a gate connected to a first node, a first terminal, and a second terminal connected to a second node, a first storage capacitor connected between the first node and the second node, a second storage capacitor connected between the first node and the second node, a second transistor including a gate connected to the first node, a first terminal, and a second terminal connected to the first node, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor including a gate receiving an emission signal, a first terminal connected to a line of a first power supply voltage, and a second terminal connected to the first terminal of the first transistor, and a light emitting element including an anode connected to the second node, and a cathode connected to a line of a second power supply voltage.

Abstract: An electronic device includes a first frame, a speaker module, a wireless communication circuit, a conductive connection member which is connected to the wireless communication circuit via a first capacitor, a conductive pattern which is connected at a first point to the conductive connection member, and includes a first portion extending from the first point and connected to the speaker module and a second portion extending from the first point, and a control circuit, wherein the first portion includes a first inductor, and the wireless communication circuit may transmit or receive a first signal in a first frequency band via a first electrical path including the first capacitor, the conductive connection member, and the second portion of the conductive pattern.

Abstract: A pixel according to an embodiment of the disclosure includes a light emitting element, a pulse width control circuit that is electrically connected to a data line to which a data voltage is applied, generates an emission control signal having a pulse width depending on the data voltage, and outputs the emission control signal, and a pixel driving circuit that receives the emission control signal and supplies a driving current to the light emitting element for a period according to the pulse width of the emission control signal. According to an embodiment of the disclosure, a pixel displaying images of various grayscales by controlling a period in which the light emitting element emits light, a method for driving the same, and a display device including the same may be provided.

Abstract: An analog-to-digital conversion circuit includes an analog-to-digital converter (ADC) configured to receive an input signal and a first clock signal from an external source and to output a second clock signal and a digital output signal, a decision counter configured to increment a decision count value each time when the second clock signal received from the analog-to-digital converter is applied to the decision counter, a voltage control logic configured to output a control signal based on a result of comparing the decision count value with a reference count value, and a regulator configured to output an operation voltage, wherein the ADC is configured to adjust the cycle of the second clock signal, and the voltage control logic is configured to control the regulator to output a corrected operating voltage via the control signal.

Abstract: A magnetic memory device may include a spin current channel layer, a wiring crossing the spin current channel layer, and an MTJ layer at an intersection of the spin current channel layer and the wiring. The spin current channel layer may include an MgO-based layer and a beta (?)-phase tungsten (W) layer on the MgO-based layer. The beta (?)-phase tungsten (W) layer may be in contact with the MTJ layer.

Abstract: A method for extending one or more static resources in a multiple enabled profile capable embedded universal integrated circuit card (eUICC) includes receiving a request to allocate at least one first static resource at a first port of the eUICC, determining whether the at least one first static resource is available for allocation, determining whether the eUICC supports a port extension feature, and whether at least one second port of the plurality of ports is available for access, and performing at least one of merging one or more second static resources of the at least one second port with one or more first static resources of the first port, and initiating at least one action associated with the one or more first static resources.

Abstract: Disclosed are an electronic device and a controlling method of an electronic device.