Electronic apparatus and controlling method thereof

Abstract

An electronic device and a control method are disclosed. The electronic device includes a converter unit that converts AC power into DC power, a PFC unit including a PFC circuit and a PFC control circuit, and a converter unit. The converter unit controls the voltage output from the PFC unit using a transformer to supply power through an output terminal. When the electronic device operates as a multimedia function, a first switch is set to a first state, and when the electronic device operates as a lighting function, the first switch is set to a second state. The PFC unit controls the PFC control circuit based on the state of the first switch.

Description

Technology Field

[65535] The present disclosure relates to an electronic device and a control method, and more specifically, to an electronic device and a control method including a lighting function and a multimedia function. Background Technology Recently, various electronic devices are being developed. These diverse electronic devices include multimedia devices, and the demand for compact multimedia devices is increasing. As the demand for compact multimedia devices grows, various functions are being added to them. For example, multimedia devices may include multimedia functions for outputting video content as well as lighting functions. However, since multimedia devices and lighting devices have different functions, their specification requirements also differ. Consequently, the specifications for when a multimedia device operates as a multimedia device differ from those for when it operates as a lighting device. For instance, a multimedia device operating as a multimedia device must satisfy Total Harmonic Distortion (THD) standards if its power consumption exceeds 75W, while a multimedia device operating as a lighting device must satisfy THD regulations if its power consumption exceeds 25W. Alternatively, depending on the country, multimedia devices operating as lighting devices must satisfy THD regulations if their power consumption is 5W or less, or 25W or more. To satisfy THD regulations, Power Factor Correction (PFC) functionality is mandatory for the power supply unit of a multimedia device. To satisfy all THD regulations under various conditions, the volume and cost of power supply units may increase. Therefore, there is a need for miniaturized power supply units that meet THD regulations under various conditions. The problem to be solved The present disclosure is intended to solve the aforementioned problems, and the purpose of the present disclosure is to provide an electronic device and a control method including a compact power supply that satisfies the THD regulation in a multimedia device with added lighting functions. means of solving the problem An electronic device according to one embodiment of the present disclosure includes a converter unit that converts AC power into DC power, a PFC unit including a PFC circuit and a PFC control circuit, and a converter unit. The converter unit controls the voltage output from the PFC unit using a transformer to supply power through an output terminal. When the electronic device operates as a multimedia function, a first switch included in the converter unit is set to a first state, and when it operates as a lighting function, the first switch is set to a second state. The PFC unit controls the PFC control circuit based on the state of the first switch. An electronic device according to another embodiment of the present disclosure includes a converter unit that converts AC power into DC, a PFC circuit, a PFC control circuit, a first comparator, an AND gate, and a second switch. The converter unit includes a converter unit including an output current monitoring circuit. The second switch is connected to the power terminal of the PFC control circuit and is controlled according to the output signal of the AND gate. The input terminal of the AND gate is connected to the output terminal of the first comparator and one terminal of the first switch, and the other terminal of the first switch is connected to ground. The converter unit includes a transformer By utilizing the voltage output from the PFC unit, power is supplied through the output terminal, the output current of the power output to the output terminal is identified using the output current monitoring circuit, the first switch is controlled based on the identified output current, and the PFC unit controls the second switch based on a signal based on the state of the first switch and a signal output from the first comparator to control the power supplied to the PFC control circuit.A method for controlling an electronic device according to one embodiment of the present disclosure comprises the steps of converting AC power into DC power, controlling a PFC unit, and controlling a voltage output from a PFC unit using a transformer in a converter unit to supply power. The step of controlling the PFC unit involves setting a first switch included in the converter unit to a first state when the electronic device operates as a multimedia function, setting the first switch to a second state when the electronic device operates as a lighting function, and controlling a PFC control circuit of the PFC unit based on the state of the first switch. Brief explanation of the drawing FIG. 1 is a perspective view illustrating the external appearance of an electronic device according to one embodiment of the present disclosure. FIG. 2 is a block diagram explaining the configuration of an electronic device according to one embodiment of the present disclosure. FIG. 3 is a perspective view illustrating the external appearance of an electronic device according to another embodiment of the present disclosure. FIG. 4 is a perspective view illustrating the external appearance of an electronic device according to yet another embodiment of the present disclosure. FIG. 5 is a perspective view illustrating the external appearance of an electronic device according to yet another embodiment of the present disclosure. FIG. 6a and FIG. 6b are perspective views illustrating the external appearance of an electronic device according to yet another embodiment of the present disclosure. FIG. 7a is a diagram explaining the power supply unit of an electronic device that controls a PFC control circuit according to a function performed according to one embodiment of the present disclosure. FIG. 7b is a diagram explaining the operation of an electronic device according to one embodiment of the present disclosure when performing a multimedia function. FIG. 7c is a diagram explaining the operation of an electronic device according to one embodiment of the present disclosure when the device performs a lighting function. FIG. 8 is a diagram explaining the operation waveform of the electronic device of FIG. 7a according to one embodiment of the present disclosure. FIG. 9 is one This is a drawing illustrating a power supply unit of an electronic device that controls a PFC control circuit according to the function performed and input voltage according to an embodiment. FIG. 10 is a drawing illustrating the operation waveform of the electronic device of FIG. 9 according to an embodiment of the present disclosure. FIG. 11 is a drawing illustrating an electronic device including a power supply unit implemented as an adapter according to an embodiment of the present disclosure. FIG. 12 is a drawing illustrating the operation waveform of the electronic device of FIG. 11 according to an embodiment of the present disclosure. FIG. 13 is a flowchart illustrating a control method of an electronic device according to an embodiment. Specific details for implementing the invention Various embodiments are described in more detail below with reference to the attached drawings. The embodiments described in this specification may be modified in various ways. Specific embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the attached drawings are intended only to facilitate understanding of various embodiments. Accordingly, the technical concept is not limited by specific embodiments disclosed in the attached drawings, and it should be understood that it includes all equivalents or substitutions that fall within the concept and scope of the disclosure. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but these components are not limited by the aforementioned terms. The aforementioned terms are used solely for the purpose of distinguishing one component from another. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Where one component is described as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, or that there may be other components in between. On the other hand, where one component is described as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. In the description of the present disclosure, the order of each step should be understood as non-restrictive, unless a preceding step must logically and temporally be performed prior to a subsequent step.In other words, except for the exceptional cases mentioned above, the essence of the disclosure is not affected even if the process described in the subsequent step is performed prior to the process described in the preceding step, and the scope of rights should also be defined regardless of the order of the steps. Furthermore, the designation "A or B" in this specification is defined to mean not only selectively referring to either A or B, but also including both A and B. Additionally, the term "included" in this specification encompasses the inclusion of additional components beyond the elements listed as included. This specification describes only the essential components necessary for the description of this disclosure and does not mention components unrelated to the essence of this disclosure. Moreover, the mentioned components should not be interpreted in an exclusive sense, but in a non-exclusive sense, allowing for the inclusion of other components as well. Furthermore, in describing this disclosure, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the gist of this disclosure, such detailed description is abbreviated or omitted. Meanwhile, each embodiment may be implemented or operated independently, but each embodiment may be implemented or operated in combination. FIG. 1 is a perspective view illustrating the appearance of an electronic device (100) according to one embodiment of the present disclosure. Referring to FIG. 1, the electronic device (100) may include a head (103), a main body (105), a projection lens (110), a connector (130), or a cover (107). The electronic device (100) may be a device of various forms. In particular, the electronic device (100) may be a projector device that magnifies and projects an image onto a wall or screen, and the projector device may be an LCD projector or a DLP (digital light processing) projector using a DMD (digital micromirror device).Additionally, the electronic device (100) may be a home or industrial display device, or a lighting device used in daily life, or a sound device including a sound module, or may be implemented as a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a wearable device, or a home appliance. Meanwhile, the electronic device (100) according to one embodiment of the present disclosure is not limited to the devices described above, and the electronic device (100) may be implemented as an electronic device (100) having two or more functions of the devices described above. For example, the electronic device (100) may be used as a display device, a lighting device, or a sound device by turning off the projector function and turning on the lighting function or speaker function according to the operation of the processor, and may be used as an AI speaker by including a microphone or a communication device. The main body (105) is a housing that forms the exterior and may support or protect the components of the electronic device (100) (e.g., the configuration shown in FIG. 2) placed inside the main body (105). The shape of the main body (105) may have a structure close to a cylinder as shown in FIG. 1. However, the shape of the main body (105) is not limited thereto, and according to various embodiments of the present disclosure, the main body (105) may be implemented in various geometric shapes such as a column, a cone, or a sphere having a polygonal cross-section. The size of the main body (105) may be such that a user can hold or move it with one hand, may be implemented in a super-compact size for easy portability, or may be implemented in a size that can be mounted on a table or attached to a lighting device. The material of the main body (105) may be implemented in a matte metal or synthetic resin so that the user's fingerprints or dust do not adhere to it, or the exterior of the main body (105) may be made of a smooth glossy finish. A friction area may be formed in a part of the exterior of the main body (105) so that the user can hold and move it.Alternatively, the main body (105) may be provided with a folded gripping portion or support (108a, see FIG. 3) that a user can grip in at least a portion of the area. A projection lens (110) is formed on one side of the main body (105) and is formed to project light passing through a lens array out of the main body (105). In various embodiments, the projection lens (110) may be an optical lens with a low-dispersion coating to reduce chromatic aberration. The projection lens (110) may be a convex lens or a condensing lens, and in one embodiment, the projection lens (110) may adjust the focus by adjusting the position of a plurality of sub-lenses. A head (103) is provided to be coupled to one side of the main body (105) to support and protect the projection lens (110). The head (103) may be coupled to the main body (105) so as to be swivelable within a preset angle range relative to one side of the main body (105). The head (103) can be swiveled automatically or manually by a user or processor to freely adjust the projection angle of the projection lens (110). Alternatively, although not shown in the drawing, the head (103) may be coupled to the main body (105) and may include a neck extending from the main body (105), so that the head (103) can be tilted or tilted to adjust the projection angle of the projection lens (110). The electronic device (100) can project light or an image to a desired location by adjusting the direction of the head (103) and adjusting the projection angle of the projection lens (110) while the position and angle of the main body (105) are fixed. Additionally, the head (103) may include a handle that can be rotated in a desired direction and grasped by the user. A plurality of openings may be formed on the outer surface of the main body (105). Audio output from an audio output unit may be output to the outside of the main body (105) of the electronic device (100) through the plurality of openings. The audio output section may include a speaker, and the speaker may be used for general purposes such as multimedia playback, recording playback, voice output, etc.According to one embodiment of the present disclosure, a heat dissipation fan (not shown) may be provided inside the main body (105), and when the heat dissipation fan (not shown) is driven, air or heat inside the main body (105) may be discharged through a plurality of openings. Therefore, the electronic device (100) can discharge heat generated by the operation of the electronic device (100) to the outside and prevent the electronic device (100) from overheating. The connector (130) can connect the electronic device (100) to an external device to transmit and receive electrical signals or receive power from the outside. According to one embodiment of the present disclosure, the connector (130) may be physically connected to an external device. At this time, the connector (130) may include an input / output interface and may communicate with the external device or receive power via wired or wireless means. For example, the connector (130) may include an HDMI connection terminal, a USB connection terminal, an SD card receiving slot, an audio connection terminal, or a power outlet, or it may include a Bluetooth, Wi-Fi, or wireless charging connection module that is wirelessly connected to an external device. Additionally, the connector (130) may have a socket structure connected to an external lighting device and may receive power by being connected to the socket receiving slot of the external lighting device. The size and specifications of the socket structure connector (130) may be implemented in various ways considering the receiving structure of the external device that can be coupled. For example, according to the international standard E26, the diameter of the joint portion of the connector (130) may be implemented as 26 mm, in which case the electronic device (100) may be coupled to an external lighting device such as a stand by replacing a conventionally used light bulb. Meanwhile, when coupled to a socket located on the existing ceiling, the electronic device (100) has a structure that projects from top to bottom, and if the electronic device (100) is not rotated by the socket coupling, the screen also cannot rotate.Accordingly, even when power is supplied through socket connection, the electronic device (100) can rotate. The electronic device (100) is socket-connected to a stand on the ceiling, and the head (103) is swiveled on one side of the main body (105) to adjust the projection angle, thereby allowing the screen to be projected to a desired position or the screen to be rotated. The connector (130) may include a connection sensor, and the connection sensor may sense whether the connector (130) and an external device are connected, the connection state, or the connection target, and transmit this to a processor. The processor may control the operation of the electronic device (100) based on the received detection value. The cover (107) may be connected to and detached from the main body (105) and may protect the connector (130) so that the connector (130) is not always exposed to the outside. The shape of the cover (107) may have a shape that is continuous with the main body (105) as shown in FIG. 1, or it may be implemented to correspond to the shape of the connector (130). The cover (107) can support the electronic device (100), and the electronic device (100) can be attached to the cover (107) and used by being attached to or mounted on an external stand. In various embodiments of the electronic device (100), a battery may be provided inside the cover (107). The battery may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. Although not shown in the drawings, the electronic device (100) may include a camera module, and the camera module may capture still images and video. According to one embodiment, the camera module may include one or more lenses, an image sensor, an image signal processor, or a flash. Although not shown in the drawings, the electronic device (100) may include a protective case (not shown) to protect the electronic device (100) and to allow for easy transport, or may include a stand (not shown) that supports or fixes the main body (105), or a bracket (not shown) that can be attached to a wall or partition.Additionally, the electronic device (100) can be connected to various external devices using a socket structure to provide various functions. In one embodiment, the electronic device (100) can be connected to an external camera device using a socket structure. The electronic device (100) can provide an image stored in the connected camera device or an image currently being captured using a projection unit (210). In another embodiment, the electronic device (100) can be connected to a battery module using a socket structure to receive power. Meanwhile, although the electronic device (100) can be connected to an external device using a socket structure, this is merely one embodiment, and it can be connected to an external device using another interface (e.g., USB, etc.). FIG. 2 is a block diagram illustrating the configuration of an electronic device according to one embodiment of the present disclosure. As illustrated in FIG. 2, the electronic device (100) may include a projection unit (210), memory (220), user interface (230), input / output interface (240), audio output unit (250), power supply unit (260), and processor (270). Meanwhile, the configuration illustrated in FIG. 2 is merely one embodiment, and some components may be omitted, and new components may be added. The projection unit (210) is a component that projects an image outward. According to one embodiment of the present disclosure, the projection unit (210) may be implemented using various projection methods (e.g., cathode-ray tube (CRT) method, liquid crystal display (LCD) method, digital light processing (DLP) method, laser method, etc.). As an example, the CRT method is basically the same principle as a CRT monitor. The CRT method magnifies the image using a lens in front of the cathode-ray tube (CRT) to display the image on a screen. Depending on the number of cathode ray tubes, it is divided into a single-tube type and a three-tube type, and in the case of the three-tube type, the Red, Green, and Blue cathode ray tubes can be implemented separately.As another example, the LCD method displays images by transmitting light from a light source through liquid crystals. LCD methods are divided into single-panel and three-panel types; in the case of the three-panel type, light from the light source is separated into Red, Green, and Blue by a dichroic mirror (a mirror that reflects only specific colors of light and allows others to pass through), passes through the liquid crystals, and then converges back into a single point. As yet another example, the DLP method displays images using a DMD (Digital Micromirror Device) chip. The projection section of a DLP method may include a light source, a color wheel, a DMD chip, and a projection lens. Light output from the light source can acquire color as it passes through a rotating color wheel. The light passing through the color wheel is input into the DMD chip. The DMD chip contains numerous micro-mirrors and reflects the light input into it. The projection lens performs the function of magnifying the light reflected from the DMD chip to the size of the image. As yet another example, the laser method includes a DPSS (Diode Pumped Solid State) laser and a galvanometer. A laser that outputs various colors utilizes a laser in which three DPSS lasers are installed for each RGB color and their optical axes are superimposed using a special mirror. The galvanometer includes a mirror and a high-output motor to move the mirror at a high speed. For example, the galvanometer can rotate the mirror at a maximum of 40 KHz / sec. The galvanometer is mounted according to the scanning direction; since the projector generally performs planar scanning, the galvanometer can also be positioned along the x and y axes. Meanwhile, the projection unit (210) may include various types of light sources. For example, the projection unit (210) may include at least one light source among a lamp, an LED, and a laser.The projection unit (210) can output images with a 4:3 aspect ratio, a 5:4 aspect ratio, or a 16:9 wide aspect ratio depending on the use of the electronic device (100) or the user's settings, and can output images with various resolutions such as WVGA (854*480), SVGA (800*600), XGA (1024*768), WXGA (1280*720), WXGA (1280*800), SXGA (1280*1024), UXGA (1600*1200), and Full HD (1920*1080) depending on the aspect ratio. Meanwhile, the projection unit (210) can perform various functions to adjust the output image under the control of the processor (270). For example, the projection unit (210) can perform functions such as zoom, keystone, quick corner (4-corner) keystone, and lens shift. Specifically, the projection unit (210) can enlarge or reduce the image depending on the distance from the screen (projection distance). That is, a zoom function can be performed depending on the distance from the screen. At this time, the zoom function may include a hardware method that adjusts the screen size by moving a lens and a software method that adjusts the screen size by cropping the image. Meanwhile, when the zoom function is performed, the focus of the image needs to be adjusted. For example, the focus adjustment method includes a manual focus method and an electric method. A manual focus method refers to a method of manually adjusting the focus, and an electric method refers to a method in which the projector automatically adjusts the focus using a motor built into it when the zoom function is performed. When performing the zoom function, the projection unit (210) may provide a digital zoom function through software, and may provide an optical zoom function that performs the zoom function by moving the lens through a drive unit. In addition, the projection unit (210) can perform a keystone function. If the height is not correct for frontal projection, the screen may be distorted upward or downward. The keystone function refers to a function that corrects the distorted screen.For example, if distortion occurs in the left-right direction of the screen, it can be corrected using horizontal keystone, and if distortion occurs in the up-down direction, it can be corrected using vertical keystone. The Quick Corner (4-Corner) Keystone function is a function that corrects the screen when the central area of ​​the screen is normal but the corner areas are unbalanced. The Lens Shift function is a function that moves the screen as is when the screen is off the screen. Meanwhile, the projection unit (210) can automatically provide zoom / keystone / focus functions by analyzing the surrounding environment and projection environment without user input. Specifically, the projection unit (210) can automatically provide zoom / keystone / focus functions based on the distance between the electronic device (100) and the screen detected through sensors (depth camera, distance sensor, infrared sensor, illuminance sensor, etc.), information about the space where the electronic device (100) is currently located, and information about the amount of ambient light. In addition, the projection unit (210) can provide lighting functions using a light source. In particular, the projection unit (210) can provide a lighting function by outputting a light source using an LED. According to one embodiment, the projection unit (210) may include a single LED, and according to another embodiment, the electronic device may include a plurality of LEDs. Meanwhile, the projection unit (210) may output a light source using a surface-emitting LED according to an implementation example. Here, the surface-emitting LED may refer to an LED having a structure in which an optical sheet is placed on the upper side of the LED so that the light source is evenly distributed and output. Specifically, when a light source is output through the LED, the light source can be evenly distributed through the optical sheet, and the light source distributed through the optical sheet can be incident on the display panel. Meanwhile, the projection unit (210) may provide a dimming function to the user to adjust the intensity of the light source.Specifically, when user input for adjusting the intensity of a light source is received from a user through a user interface (240) (e.g., a touch display button or a dial), the projection unit (210) can control an LED to output an intensity of the light source corresponding to the received user input. Additionally, the projection unit (210) can provide a dimming function based on content analyzed by the processor (270) without user input. Specifically, the projection unit (210) can control an LED to output an intensity of the light source based on information about the currently provided content (e.g., content type, content brightness, etc.). Meanwhile, the projection unit (210) can control the color temperature by the control of the processor (270). Here, the processor (270) can control the color temperature based on the content. Specifically, when content is identified as being output, the processor (270) can obtain frame-by-frame color information of the content determined to be output. Furthermore, the processor (270) can control the color temperature based on the acquired frame-by-frame color information. Here, the processor (270) can acquire at least one main color of the frame based on the frame-by-frame color information. And, the processor (270) can adjust the color temperature based on at least one acquired main color. For example, the color temperature that the processor (270) can adjust can be classified as a warm type or a cold type. Here, it is assumed that the frame to be output (hereinafter output frame) contains a scene where a fire has occurred. The processor (270) can identify (or acquire) that the main color is red based on the color information contained in the current output frame. And, the processor (270) can identify the color temperature corresponding to the identified main color (red). Here, the color temperature corresponding to red may be a warm type. Meanwhile, the processor (270) may use an artificial intelligence model to acquire the frame's color information or the main color.According to one embodiment, the artificial intelligence model may be stored in the electronic device (100) (e.g., memory (220)). According to another embodiment, the artificial intelligence model may be stored in an external server capable of communicating with the electronic device (100). Meanwhile, the electronic device (100) may control lighting functions in conjunction with an external device. Specifically, the electronic device (100) may receive lighting information from an external device. Here, the lighting information may include at least one of brightness information or color temperature information set by the external device. Here, the external device may refer to a device connected to the same network as the electronic device (100) (e.g., an IoT device included in the same home / company network) or a device that is not on the same network as the electronic device (100) but is capable of communicating with the electronic device (e.g., a remote control server). For example, assume that an external lighting device (IoT device) included in the same network as the electronic device (100) is outputting red light at a brightness of 50. The external lighting device (IoT device) receives lighting information (e.g., red light Information indicating that it is outputting at a brightness of 50 can be transmitted directly or indirectly to the electronic device (100). Here, the electronic device (100) can control the output of the light source based on lighting information received from an external lighting device. For example, if the lighting information received from the external lighting device includes information indicating that red light is output at a brightness of 50, the electronic device (100) can output red light at a brightness of 50. Meanwhile, the electronic device (100) can control the lighting function based on biometric information. Specifically, the processor (270) can acquire the user's biometric information. Here, the biometric information may include at least one of the user's body temperature, heart rate, blood pressure, respiration, and electrocardiogram. Here, the biometric information may include various information in addition to the information described above. As an example, the electronic device may include a sensor for measuring biometric information.The processor (270) can acquire the user's biometric information through a sensor and control the output of the light source based on the acquired biometric information. As another example, the processor (270) can receive biometric information from an external device through an input / output interface (240). Here, the external device may refer to the user's portable communication device (e.g., a smartphone or a wearable device). The processor (270) can acquire the user's biometric information from the external device and control the output of the light source based on the acquired biometric information. Meanwhile, according to an embodiment, the electronic device can identify whether the user is sleeping, and if the user is identified as sleeping (or preparing to sleep), the processor (270) can control the output of the light source based on the user's biometric information. The memory (220) may store at least one command regarding the electronic device (100). Also, the memory (220) may store an O / S (Operating System) for operating the electronic device (100). Additionally, various software programs or applications for the operation of the electronic device (100) may be stored in the memory (220) according to various embodiments of the present disclosure. Furthermore, the memory (220) may include semiconductor memory such as flash memory or magnetic storage media such as a hard disk. Specifically, various software modules for the operation of the electronic device (100) may be stored in the memory (220) according to various embodiments of the present disclosure, and the processor (270) may control the operation of the electronic device (100) by executing the various software modules stored in the memory (220). That is, the memory (220) is accessed by the processor (270), and data reading / writing / modification / deletion / updating, etc., by the processor (270) may be performed.Meanwhile, in the present disclosure, the term memory (220) may be used to include memory (220), ROM (not shown), RAM (not shown) within the processor (270), or a memory card (not shown) (e.g., micro SD card, memory stick) mounted in the electronic device (100). The user interface (230) may include various types of input devices. For example, the user interface (230) may include a physical button. In this case, the physical button may include a function key, a directional key (e.g., a 4-directional key), or a dial button. According to one embodiment, the physical button may be implemented as a plurality of keys. According to another embodiment, the physical button may be implemented as a single key. Here, when the physical button is implemented as a single key, the electronic device (100) may receive user input in which the single key is pressed for a threshold time or longer. When user input is received in which a single key is pressed for longer than a threshold time, the processor (270) can perform a function corresponding to the user input. For example, the processor (270) can provide a lighting function based on the user input. Additionally, the user interface (230) can receive user input using a non-contact method. When receiving user input through a contact method, physical force must be transmitted to the electronic device. Therefore, a method for controlling the electronic device regardless of physical force may be required. Specifically, the user interface (230) can receive user gestures and perform actions corresponding to the received user gestures. Here, the user interface (230) can receive user gestures through a sensor (e.g., an image sensor or an infrared sensor). Additionally, the user interface (230) can receive user input using a touch method. For example, the user interface (230) can receive user input through a touch sensor.According to one embodiment, the touch method may be implemented as a non-contact method. For example, the touch sensor may determine whether the user's body has approached within a threshold distance. Here, the touch sensor may identify user input even when the user does not touch the touch sensor. Meanwhile, according to another embodiment, the touch sensor may identify user input when the user touches the touch sensor. Meanwhile, the electronic device (100) may receive user input in various ways other than the user interface described above. In one embodiment, the electronic device (100) may receive user input through an external remote control device. Here, the external remote control device may be a remote control device corresponding to the electronic device (100) (e.g., a control device dedicated to the electronic device) or a user's portable communication device (e.g., a smartphone or a wearable device). Here, the user's portable communication device may store an application for controlling the electronic device. The portable communication device may acquire user input through the stored application and transmit the acquired user input to the electronic device (100). The electronic device (100) can receive user input from a portable communication device and perform an operation corresponding to the user's control command. Meanwhile, the electronic device (100) can receive user input using voice recognition. According to one embodiment, the electronic device (100) can receive user voice through a microphone included in the electronic device. According to another embodiment, the electronic device (100) can receive user voice from a microphone or an external device. Specifically, the external device can acquire user voice through the microphone of the external device and transmit the acquired user voice to the electronic device (100). The user voice transmitted from the external device may be audio data or digital data converted from audio data (e.g., audio data converted into the frequency domain).Here, the electronic device (100) can perform an action corresponding to the received user voice. Specifically, the electronic device (100) can receive audio data corresponding to the user voice through a microphone. Then, the electronic device (100) can convert the received audio data into digital data. Then, the electronic device (100) can convert the converted digital data into text data using a Speech To Text (STT) function. According to one embodiment, the Speech To Text (STT) function can be performed directly by the electronic device (100), and according to another embodiment, the STT (Speech To Text) function can be performed by an external server. The electronic device (100) can transmit the digital data to an external server. The external server can convert the digital data into text data and obtain control command data based on the converted text data. The external server can transmit the control command data (which may also include text data) to the electronic device (100). The electronic device (100) can perform an action corresponding to the user's voice based on the acquired control command data. Meanwhile, the electronic device (100) can provide a voice recognition function using a single assistant (or an artificial intelligence assistant, e.g., Bixby™), but this is merely one embodiment and the voice recognition function can be provided through multiple assistants. At this time, the electronic device (100) can provide a voice recognition function by selecting one of the multiple assistants based on a trigger word corresponding to the assistant or a specific key on the remote control. Meanwhile, the electronic device (100) can receive user input using screen interaction. Screen interaction may refer to a function in which the electronic device identifies whether a predetermined event occurs through an image projected onto a screen (or projection surface) and acquires user input based on the predetermined event.Here, a predetermined event may refer to an event in which a predetermined object is identified at a specific location (e.g., a location where a UI is projected to receive user input). Here, the predetermined object may include at least one of a part of the user's body (e.g., a finger), a pointer, or a laser pointer. When the predetermined object is identified at a location corresponding to the projected UI, the electronic device (100) may identify that user input selecting the projected UI has been received. For example, the electronic device (100) may project a guide image to display the UI on a screen. And, the electronic device (100) may identify whether the user selects the projected UI. Specifically, when the predetermined event is identified at the location of the projected UI, the electronic device (100) may identify that the user has selected the projected UI. Here, the projected UI may include at least one item. Here, the electronic device (100) can perform spatial analysis to identify whether a predetermined event is located at the position of the projected UI. Here, the electronic device (100) can perform spatial analysis through a sensor (e.g., image sensor, infrared sensor, depth camera, distance sensor, etc.). By performing spatial analysis, the electronic device (100) can identify whether a predetermined event occurs at a specific location (the position where the UI is projected). And, if it is identified that a predetermined event occurs at a specific location (the position where the UI is projected), the electronic device (100) can identify that user input for selecting the UI corresponding to the specific location has been received. The input / output interface (240) is configured to input or output at least one of an audio signal and a video signal. The input / output interface (240) can receive at least one of the audio and video signals from an external device and can output control commands to the external device.Meanwhile, in one embodiment of the present disclosure, the input / output interface (240) may be implemented as at least one wired input / output interface among HDMI (High Definition Multimedia Interface), MHL (Mobile High-Definition Link), USB (Universal Serial Bus), USB C-type, DP (Display Port), Thunderbolt, VGA (Video Graphics Array) port, RGB port, D-SUB (D-subminiature), and DVI (Digital Visual Interface). According to one embodiment, the wired input / output interface may be implemented as an interface that inputs and outputs only audio signals and an interface that inputs and outputs only video signals, or as a single interface that inputs and outputs both audio and video signals. Additionally, the electronic device (100) may receive data through the wired input / output interface, but this is merely one embodiment, and power may be supplied through the wired input / output interface. For example, the electronic device (100) may receive power from an external battery via USB C-type or receive power from an outlet via a power adapter. As another example, the electronic device may receive power from an external device (e.g., a laptop or monitor) through DP. Meanwhile, in one embodiment of the present disclosure, the input / output interface (240) may be implemented as a wireless input / output interface that performs communication using at least one of the communication methods of Wi-Fi, Wi-Fi Direct, Bluetooth, Zigbee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), and LTE (Long Term Evolution).Depending on the implementation example, the wireless input / output interface may be implemented as an interface that inputs and outputs only audio signals and an interface that inputs and outputs only video signals, or as a single interface that inputs and outputs both audio and video signals. Additionally, the audio signal may be received through a wired input / output interface and the video signal may be received through a wireless input / output interface. Alternatively, the audio signal may be received through a wireless input / output interface and the video signal may be received through a wired input / output interface. The audio output unit (250) is configured to output an audio signal. In particular, the audio output unit (250) may include an audio output mixer, an audio signal processor, and an audio output module. The audio output mixer may synthesize a plurality of audio signals to be output into at least one audio signal. For example, the audio output mixer may synthesize an analog audio signal and another analog audio signal (e.g., an analog audio signal received from an external source) into at least one analog audio signal. The audio output module may include a speaker or an output terminal. According to one embodiment, the sound output module may include a plurality of speakers, in which case the sound output module may be placed inside the main body, and sound radiated by covering at least a part of the diaphragm of the sound output module may pass through a waveguide and be transmitted to the outside of the main body. The sound output module may include a plurality of sound output units, and sound may be radiated in all directions, that is, in all 360 degrees, by symmetrically arranging the plurality of sound output units on the exterior of the main body. The power supply unit (260) may receive power from the outside and supply power to various components of the electronic device (100). The power supply unit (260) according to one embodiment of the present disclosure may receive power through various methods. In one embodiment, the power supply unit (260) may receive power using a connector (130) as shown in FIG. 1.Additionally, the power supply unit (260) may receive power using a 220V DC power cord. However, it is not limited thereto, and the electronic device may receive power using a USB power cord or a wireless charging method. Additionally, the power supply unit (260) may receive power using an internal battery or an external battery. In one embodiment of the present disclosure, the power supply unit (260) may receive power through an internal battery. For example, the power supply unit (260) may charge the power of the internal battery using at least one of a 220V DC power cord, a USB power cord, and a USB C-Type power cord, and receive power through the charged internal battery. Additionally, in one embodiment of the present disclosure, the power supply unit (260) may receive power through an external battery. For example, when a connection between the electronic device and an external battery is made through various wired communication methods such as a USB power cord, a USB C-Type power cord, or a socket, the power supply unit (260) may receive power through the external battery. That is, the power supply unit (260) may receive power directly from an external battery, or charge an internal battery through an external battery and receive power from the charged internal battery. The power supply unit (260) according to the present disclosure may receive power by using at least one of the plurality of power supply methods described above. Meanwhile, regarding power consumption, the electronic device (100) may have power consumption less than or equal to a preset value (e.g., 43W) due to reasons such as the socket type and other standards. At this time, the electronic device (100) may vary the power consumption to reduce power consumption when using a battery. That is, the electronic device (100) may vary the power consumption based on the power supply method and power usage amount. Meanwhile, the electronic device (100) according to one embodiment of the present disclosure may provide various smart functions.Specifically, the electronic device (100) is connected to a mobile terminal device for controlling the electronic device (100), and the screen output from the electronic device (100) can be controlled through user input received from the mobile terminal device. For example, the mobile terminal device may be implemented as a smartphone including a touch display, and the electronic device (100) receives and outputs screen data provided by the mobile terminal device from the mobile terminal device, and the screen output from the electronic device (100) can be controlled according to user input received from the mobile terminal device. The electronic device (100) can share content or music provided by the mobile terminal device by performing a connection with the mobile terminal device through various communication methods such as Miracast, Airplay, Wireless DEX, and Remote PC. In addition, the mobile terminal device and the electronic device (100) can be connected in various connection methods. In one embodiment, the mobile terminal device can search for the electronic device (100) to perform a wireless connection, or the electronic device (100) can search for the mobile terminal device to perform a wireless connection. Additionally, the electronic device (100) can output content provided by the mobile terminal device. In one embodiment, when specific content or music is being output by the mobile terminal device, the mobile terminal device is placed near the electronic device, and a preset gesture is detected through the display of the mobile terminal device (e.g., motion tap view), the electronic device (100) can output the content or music being output by the mobile terminal device. In one embodiment, when specific content or music is being output by the mobile terminal device, the mobile terminal device comes closer to the electronic device (100) at a preset distance or less (e.g., non-contact tap view), or the mobile terminal device comes into contact with the electronic device (100) twice at short intervals (e.g., contact tap view), the electronic device (100) can output the content or music being output by the mobile terminal device.In the above-described embodiment, it was explained that a screen identical to the screen provided by the mobile terminal device is provided by the electronic device (100), but the present disclosure is not limited thereto. That is, when a connection is established between the mobile terminal device and the electronic device (100), the first screen provided by the mobile terminal device may be output at the mobile terminal device, and a second screen provided by the mobile terminal device that is different from the first screen may be output at the electronic device (100). For example, the first screen may be a screen provided by a first application installed on the mobile terminal device, and the second screen may be a screen provided by a second application installed on the mobile terminal device. For example, the first screen and the second screen may be different screens provided by a single application installed on the mobile terminal device. In addition, for example, the first screen may be a screen including a UI in the form of a remote control for controlling the second screen. The electronic device (100) according to the present disclosure may output a standby screen. For example, if the electronic device (100) is not connected to an external device or if there is no input received from the external device for a preset time, the electronic device (100) may output a standby screen. The conditions for the electronic device (100) to output a standby screen are not limited to the examples described above, and a standby screen may be output under various conditions. The electronic device (100) may output a standby screen in the form of a blue screen, but the present disclosure is not limited thereto. For example, the electronic device (100) may extract only the shape of a specific object from data received from an external device to obtain an unstructured object, and output a standby screen including the obtained unstructured object. FIG. 3 is a perspective view illustrating the exterior of the electronic device (100) according to other embodiments of the present disclosure. Referring to FIG. 3, the electronic device (100) may include a support (or a handle) (108a).In various embodiments, the support (108a) may be a handle or a ring provided for a user to grasp or move the electronic device (100), or the support (108a) may be a stand that supports the main body (105) when the main body (105) is lying on its side. The support (108a) may be connected to the outer surface of the main body (105) by a hinge structure so as to be attached or detached as shown in FIG. 3, and may be selectively detached and fixed from the outer surface of the main body (105) as needed by the user. The number, shape, or arrangement structure of the support (108a) may be implemented in various ways without restriction. Although not shown in the drawing, the support (108a) may be built inside the main body (105) and can be taken out and used by the user as needed, or the support (108a) may be implemented as a separate accessory and be detachably attached to the electronic device (100). The support (108a) may include a first support surface (108a-1) and a second support surface (108a-2). The first support surface (108a-1) may be a surface facing the outside direction of the main body (105) while the support member (108a) is separated from the outer surface of the main body (105), and the second support surface (108a-2) may be a surface facing the inside direction of the main body (105) while the support member (108a) is separated from the outer surface of the main body (105). The first support surface (108a-1) extends from the bottom of the main body (105) to the top of the main body (105) and may be moved away from the main body (105), and the first support surface (108a-1) may have a flat or uniformly curved shape. The first support surface (108a-1) can support the main body (105) when the electronic device (100) is mounted so that the outer surface of the main body (105) touches the bottom surface, that is, when the projection lens (110) is positioned to face the front direction. In an embodiment including two or more supports (108a), the projection angle of the head (103) and the projection lens (110) can be adjusted by adjusting the spacing between the two supports (108a) or the hinge-open angle.The second support surface (108a-2) is a surface that comes into contact with the user or the external mounting structure when the support (108a) is supported by the user or the external mounting structure, and may have a shape corresponding to the grip structure of the user's hand or the external mounting structure so as not to slip when supporting or moving the electronic device (100). The user can fix the head (103) by orienting the projection lens (110) toward the front, hold the support (108a), move the electronic device (100), and use the electronic device (100) like a flashlight. The support groove (104) is provided in the main body (105) and is a groove structure that can accommodate the support (108a) when it is not in use, and as shown in FIG. 3, it may be implemented as a groove structure corresponding to the shape of the support (108a) on the outer surface of the main body (105). The support (108a) can be stored on the outer surface of the main body (105) through the support groove (104) when the support (108a) is not in use, and the outer surface of the main body (105) can be kept smooth. Alternatively, the structure may have a structure in which the support (108a) is stored inside the main body (105) and the support (108a) is pulled out of the main body (105) when the support (108a) is needed. In this case, the support groove (104) may be structured to be inserted into the main body (105) to accommodate the support (108a), and the second support surface (108a-2) may be in close contact with the outer surface of the main body (105), or may include a door (not shown) that opens and closes a separate support groove (104). Although not shown in the drawing, the electronic device (100) may include various types of accessories that help with the use or storage of the electronic device (100). For example, the electronic device (100) may include a protective case (not shown) to protect the electronic device (100) and allow it to be easily transported, or may include a tripod (not shown) that supports or fixes the main body (105), or a bracket (not shown) that is coupled to the outer surface to fix the electronic device (100).FIG. 4 is a perspective view illustrating the appearance of an electronic device (100) according to another embodiment of the present disclosure. Referring to FIG. 4, the electronic device (100) may include a support (or referred to as a “handle”) (108b). In various embodiments, the support (108b) may be a handle or a ring provided for a user to grasp or move the electronic device (100), or the support (108b) may be a stand that supports the main body (105) so that it can be directed at any angle while the main body (105) is lying on its side. Specifically, the support (108b) may be connected to the main body (105) at a predetermined point on the main body (105) (e.g., at 2 / 3 to 3 / 4 of the height of the main body), as shown in FIG. 4. When the support (108) is rotated toward the main body, it can support the main body (105) so that it can face at any angle while lying on its side. FIG. 5 is a perspective view illustrating the appearance of an electronic device (100) according to another embodiment of the present disclosure. Referring to FIG. 5, the electronic device (100) may include a support (or "base") (108c). The support (108c) of various embodiments may include a base plate (108c-1) provided to support the electronic device (100) on the ground and two support members (108c-2) connecting the base plate (108c) and the main body (105). In one embodiment of the present disclosure, the heights of the two support members (108c-2) are the same, so that each of the cross-sections of the two support members (108c-2) can be joined or separated by a groove provided on one outer circumference of the main body (105) and a hinge member (108c-3). The two support members can be hinge-connected to the main body (105) at a predetermined point of the main body (105) (e.g., a point 1 / 3 to 2 / 4 of the height of the main body).When two support members and a main body are joined by a hinge member (108c-3), the main body (105) can be rotated with respect to a virtual horizontal axis formed by the two hinge members (108c-3) so that the projection angle of the projection lens (110) can be adjusted. Although FIG. 5 illustrates an embodiment in which two support members (108c-2) are connected to the main body (105), the present disclosure is not limited thereto, and as in FIG. 6a and FIG. 6b, one support member and the main body (105) can be connected by one hinge member. FIG. 6a and FIG. 6b are perspective views illustrating the exterior of an electronic device (100) according to other embodiments of the present disclosure. Referring to FIG. 6a and FIG. 6b, a support (108d) of various embodiments comprises a base plate (108d-1) provided to support the electronic device (100) on the ground and a base It may include a support member (108d-2) connecting the plate (108-c) and the main body (105). Furthermore, the cross-section of the support member (108d-2) may be joined or separated by a groove provided on one outer surface of the main body (105) and a hinge member (not shown). When the support member (108d-2) and the main body (105) are joined by a hinge member (not shown), the main body (105) may rotate around a virtual horizontal axis formed by the hinge member (not shown), as shown in FIG. 6b. Meanwhile, the support shown in FIG. 3, FIG. 4, FIG. 5, FIG. 6a, and FIG. 6b is merely one embodiment, and it goes without saying that the electronic device (100) may be equipped with a support in various positions or forms. Various appearances and configurations of the electronic device have been described so far. Below, the power supply unit of an electronic device is described in detail. FIG. 7a is a drawing illustrating the power supply unit of an electronic device that controls a PFC control circuit according to a function performed according to one embodiment of the present disclosure.Referring to FIG. 7a, the power supply unit (e.g., Switching Mode Power Supply, SMPS) (260) of an electronic device may include a conversion unit (261), a Power Factor Correction (PFC) unit (262), and a converter unit (263). The conversion unit (261) converts AC (Alternate Current) power input from the outside into DC (Direct Current). For example, the conversion unit (2610) may include a step-down transformer, a rectifier, a filter, etc. The step-down transformer can reduce the AC voltage input from the outside. The rectifier can be implemented as a bridge circuit and can convert the reduced AC voltage into a DC voltage. The filter can remove ripples, etc., from the converted DC voltage to create a DC voltage of a constant magnitude. The DC voltage converted in the conversion unit (261) can be transmitted to the PFC unit (262). The PFC unit (262) can perform a PFC function to satisfy the Total Harmonic Distortion (THD) regulation according to certain conditions. The PFC unit (262) may include a PFC circuit (GATE_A area) that performs the PFC function and a PFC control circuit (or PFC control IC) (11) that controls the PFC circuit. When power is supplied to the PFC control circuit (11), the PFC control circuit (11) can control GATE_A so that the PFC circuit performs the PFC function. If power is not supplied to the PFC control circuit (11), the PFC control circuit (11) cannot control GATE_A, and the PFC circuit does not perform the PFC function. The DC power passing through the PFC section (262) can be transmitted to the converter section (263). The converter section (263) can boost the DC power transmitted from the PFC section and output it through an output terminal. The converter section (263) may include a transformer, a first switch (S1), and an output terminal.For example, the transformer in the converter (263) section can boost the transmitted DC power, and the boosted DC power can be output through the output terminal. The DC power output from the converter (263) section can be supplied to each component of the electronic device (100). As described above, the electronic device can perform multimedia functions or lighting functions. For example, when the electronic device performs a lighting function, the PFC section (262) can perform a PFC function because it must satisfy THD regulations. Alternatively, when the electronic device performs a multimedia function, the PFC section (262) may not perform a PFC function because there are no THD regulations. The first switch (S1) in the converter (263) section can control the power supplied to the PFC control circuit (11). The first switch (S1) can be turned on or off according to the multimedia on / off (AV_ON / OFF) signal. In one embodiment, when the first switch (S1) is connected to a NOT gate, the first switch (S1) may be turned on by an off (or low) signal of multimedia. Alternatively, when the first switch (S1) receives a signal of a multimedia function directly without a NOT gate, the first switch (S1) may be turned on by an on (or high) signal of multimedia. For example, the first switch (S1) may be connected in parallel between the power terminal of the PFC control circuit (11) and ground, and may include a photocoupler. When the first switch (S1) is in the off state, the power terminal of the PFC control circuit (11) and ground are in a short-circuit state, so power is supplied to the PFC control circuit (11), and the PFC control circuit (11) can control the PFC circuit. When the first switch (S1) is in the on state, the power terminal of the PFC control circuit (11) and ground are in an open-circuit state, so the power supplied to the PFC control circuit (11) may be cut off. The PFC control circuit (11) cannot control the PFC circuit because power is not supplied to it.That is, the first switch (S1) of the converter unit (263) can be turned on when the multimedia mode is selected (when the electronic device operates as a multimedia function) and turned off when the lighting mode is selected (when the electronic device operates as a lighting function). In addition, the PFC unit can control the PFC control circuit and the PFC circuit based on the state of the first switch. Below, the operation when the electronic device is in multimedia mode and the operation when it is in lighting mode are described in detail. FIG. 7b is a diagram illustrating the operation when the electronic device performs a multimedia function according to one embodiment of the present disclosure. Referring to FIG. 7b, as the electronic device performs a multimedia function, the multimedia signal may become low. The low multimedia signal may be output as high through a NOT gate. The multimedia signal output as high can turn on the first switch (S1). As described above, when an electronic device performs a multimedia function without including a NOT gate, the multimedia signal may be high, and the high multimedia signal may turn on the first switch (S1). When the first switch (S1) is in the ON state, a closed circuit may be formed between the power terminal of the PFC control circuit and ground. Accordingly, the power input to the PFC control circuit may be cut off. Due to the cut-off of the power input to the PFC control circuit, the operation of the PFC control circuit is stopped, and the operation of the PFC circuit may also be stopped. As the operation of the PFC circuit is stopped, the PF is lowered and the THD may be increased. Meanwhile, as shown in FIG. 5b, the PFC section (262) may include a bypass circuit (region D1) that bypasses the PFC circuit. Power delivered from the conversion unit (261) can be delivered to the converter unit (263) through a bypass circuit depending on the interruption of operation of the PFC circuit. FIG. 7c is a diagram illustrating the operation of an electronic device according to one embodiment of the present disclosure when it performs a lighting function.Referring to FIG. 7c, as the electronic device performs a lighting function, the multimedia signal can become high. The high multimedia signal can be output as low through a NOT gate. The multimedia signal output as low can turn off the first switch (S1). As described above, when the electronic device performs a lighting function without including a NOT gate, the multimedia signal can be low, and the low multimedia signal can turn off the first switch (S1). When the first switch (S1) is in the off state, an open circuit can be formed between the power terminal of the PFC control circuit and ground. Therefore, power can be input to the PFC control circuit. As power is input to the PFC control circuit, the PFC control circuit controls the PFC circuit, and the PFC circuit can be operated. When the PFC circuit is operated, the PF increases and the THD decreases, so the electronic device can satisfy the THD specifications of the lighting standard. Power output from the PFC unit is transferred to the converter unit (263) and can be output through the output terminal. FIG. 8 is a diagram illustrating the operation waveform of the electronic device of FIG. 7a according to an embodiment of the present disclosure. Referring to FIG. 8, AV_ON / OFF can be maintained high or low depending on the multimedia mode and the lighting mode. When the electronic device is in multimedia mode (using multimedia functions, using multimedia functions and lighting simultaneously), AV_ON / OFF can be maintained high. When the electronic device is in lighting mode (using only lighting functions), AV_ON / OFF can be maintained low. Power supply to the PFC control circuit can be determined according to AV_ON / OFF. When AV_ON / OFF is high, power supply to the PFC control circuit is interrupted, and the operation of the PFC unit (PFC circuit) can also be interrupted. When AV_ON / OFF is low, power is supplied to the PFC control circuit, and the PFC unit (PFC circuit) can operate.For example, PFC Vout maintains 390~400V when the PFC unit is operating, and may fluctuate according to the peak voltage of the input voltage when the operation of the PFC unit is stopped. The reason the PFC voltage is set higher than the AC power is to improve PF and THD by transmitting power to the converter unit through the PFC unit rather than the bypass circuit (region D1) when the PFC unit is operating. FIG. 9 is a diagram illustrating a power supply unit of an electronic device that controls a PFC control circuit according to the function performed and the input voltage according to one embodiment of the present disclosure. Referring to FIG. 9, the power supply unit (260) of the electronic device may further include a first comparator (12), an AND gate (13), and a second switch (S2). The electronic device may further include a first comparator (12), an AND gate (13), and a second switch (S2) to control the on / off operation of the PFC unit (262) according to the input voltage. The second switch (S2) is connected to the power terminal of the PFC control circuit (11) and can be controlled according to the output signal of the AND gate (13). The input terminal of the AND gate (13) can be connected to the output terminal of the first comparator (12) and one terminal of the first switch (S1). The other terminal of the first switch (S1) can be connected to ground. The peak value of the input voltage can be detected by R4 and R5 connected to the input terminal of the first comparator (12). R6 and R7 are connected to a fixed DC power source, so the voltage at the negative terminal of the first comparator (12) is a fixed DC level. Therefore, the voltage at the negative terminal of the first comparator (12) can become the reference voltage. If the positive input of the first comparator (12) is greater than the negative input, the output of the first comparator (12) becomes high, and if the positive input is less than the negative input, the output of the first comparator (12) can become low. The output of the first comparator (12) and the multimedia signal (AV_ON / OFF) can be input to the AND gate (13).The output of the AND gate (13) can control the second switch (S2) located between the power terminal and the power line of the PFC control circuit (11). That is, when the lighting mode is selected, the first switch (S1) may be in an off state due to the multimedia signal. When the first switch (S1) is in an off state, the input of the AND gate (13) connected to the multimedia signal side may be a high signal. Also, the first comparator (12) can output a high signal when the converted DC voltage is greater than or equal to a preset reference voltage. The AND gate (13) can output a high signal according to the high signal output from the first comparator (12) and the high signal on the multimedia signal side. The high signal output from the AND gate (13) turns on the second switch (S2) and can supply power to the PFC control circuit (11). When power is supplied to the PFC control circuit (11), the PFC control circuit (11) operates the PFC circuit, and the DC power converted by the converter (261) can be transmitted to the converter (263) via the PFC circuit. When the first switch (S1) is turned on and the signal on the multimedia signal side is low or the output of the first comparator (12) is low, the AND gate (13) can output a low signal. The low signal output from the AND gate (13) turns off the second switch (S2), and the power supplied to the PFC control circuit (11) can be cut off. That is, when the supplied power is greater than or equal to a preset value and in lighting mode, the PFC unit (262) can operate. For example, when the power consumption of an electronic device is 5W, a lighting device (or an electronic device including a lighting function) used in the European region must satisfy THD regulations. However, in the US region, there are no THD regulations for lighting devices (or electronic devices including a lighting function). Accordingly, the electronic device can operate the PFC unit (262) at an input voltage of 230 Vac in the European region and turn off the PFC unit (262) at an input voltage of 110 to 120 Vac in the US region.The PFC section (262) may have varying efficiency and component temperatures depending on the input voltage. Since the component temperature is linked to the lifespan of the power supply (e.g., SMPS) (260), the lifespan of the power supply (260) is designed to match the lifespan of the electronic device. The component temperature of the PFC section (262) is higher when the input voltage is lower than when it is higher. When comparing the input voltages of 220Vac and 110Vac, the current flowing through the PFC section (262) is half the level when the input voltage is 220Vac compared to when it is 110Vac. For this reason, the PFC rated power design value at an input voltage of 110Vac must be double that of an input voltage of 220Vac. For example, if the rated power of the PFC section (262) optimized for an input voltage of 220Vac is 20W, the PFC section (262) can only supply half the power, or 10W, at an input voltage of 110Vac. Accordingly, the embodiment of FIG. 7 can reduce the rated power design value of the PFC unit (262) by about half, and reduce the size and cost of the PFC unit (262). FIG. 10 is a diagram illustrating the operation waveform of the electronic device of FIG. 9 according to an embodiment of the present disclosure. Referring to FIG. 10, the reference value of the AC input voltage for the operation of the PFC unit can be set to 200 Vac considering the operation margin. When the AC input voltage is 200 Vac or higher and the multimedia signal (AV_ON / OFF) is low, power is supplied to the PFC control circuit and the PFC unit can be operated. FIG. 11 is a diagram illustrating an electronic device including a power supply unit implemented as an adapter according to an embodiment of the present disclosure. Referring to FIG. 11, the power supply unit (260) of the electronic device may include a conversion unit (261), a PFC unit (262), and a converter unit (263). The PFC section (262) may include a PFC circuit, a PFC control circuit (11), a first comparator (12), an AND gate (13), and a second switch (S2). The converter section (263) may include a transformer, a first switch (S1), an output current monitoring circuit, and an output terminal.The conversion unit (261), PFC unit (262), and converter unit (263) of FIG. 11 are similar to the operation of the conversion unit (261), PFC unit (262), and converter unit (263) described above, so the explanation will focus on the configurations that differ. When the electronic device is implemented as a DC adapter, the DC adapter is composed only of DC output and GND 2 pins, so it cannot receive a signal for mode switching of the power supply unit (260). Therefore, an output current monitoring circuit can monitor the DC output current and control the on / off of the PFC unit (262). When the output current flows through R1, the voltage applied across R1 can be amplified by the output current monitoring circuit. For example, the output current monitoring circuit may include an amplifier (21) and a second comparator (22). If the value of R1 is large, power loss may increase. Therefore, the output current monitoring circuit can be implemented with a low value of R1 by including the amplifier (21). The output current monitoring circuit can detect the output voltage using R2 and R3. The detected output voltage is input to the positive terminal of the second comparator (22), and the output voltage of the amplifier (21) can be input to the negative terminal of the second comparator (22). The Zener diode (ZD1) can prevent the voltage across R3 from rising above a certain voltage. Therefore, when the output current is less than a preset value, the output of the second comparator (22) becomes high, and when the output current is greater than or equal to the preset value, the output of the second comparator (22) can become low. The output of the second comparator (22) is input to the AND gate (13) of the PFC section (262), and the AND gate (13) can output a low or high signal depending on the output of the first comparator (12) and the output of the second comparator (22). That is, the PFC unit can operate when the input voltage is greater than or equal to a preset value and the output current is less than or equal to a preset value. FIG. 12 is a diagram illustrating the operation waveform of the electronic device of FIG. 11 according to one embodiment of the present disclosure.Referring to FIG. 12, power is supplied to the PFC control circuit and the PFC unit can operate only when the power consumption is lower than Pin_Ref and the AC input voltage is higher than 200 Vac. In other situations, the power supplied to the PFC control circuit is cut off, so the PFC unit does not operate. Therefore, in regions with an AC input voltage of 110–120 Vac (e.g., the US region), the PFC unit does not operate, and in regions with an AC input voltage of 220–230 Vac (e.g., the European region), the PFC unit can operate when the power consumption is lower than Pin_Ref. Accordingly, the embodiment of FIG. 10 can reduce the size of the power supply unit by lowering the rated design value of the PFC unit. Various embodiments of the power supply unit of the electronic device have been described so far. Below, a control method is described. FIG. 13 is a flowchart illustrating a control method of an electronic device according to one embodiment. Referring to FIG. 13, the electronic device converts AC power into DC power (S1310). The electronic device controls the PFC unit (S1320). The electronic device may turn on the first switch included in the converter section when the multimedia mode is selected. Alternatively, the electronic device may turn off the first switch when the lighting mode is selected. The electronic device may control the PFC control circuit of the PFC section based on the state of the first switch. For example, when the multimedia mode is selected, the electronic device may cut off the power supplied to the PFC control circuit based on the ON state of the first switch. Upon cutting off the power supplied to the PFC control circuit, the electronic device may stop the operation of the PFC circuit and transmit the power converted to DC power to the converter section through a bypass circuit. Alternatively, when the lighting mode is selected, the electronic device may supply power to the PFC control circuit based on the OFF state of the first switch. The electronic device may operate the PFC circuit using the power supplied to the PFC control circuit and transmit the power converted to DC power to the converter section through the PFC circuit.Alternatively, the electronic device may output a first high signal when the converted DC voltage is greater than or equal to a preset reference voltage. Additionally, when a lighting mode is selected, the electronic device may output a second high signal based on the off state of the first switch. The electronic device may output a third high signal based on the first high signal and the second high signal. Based on the output third high signal, the electronic device may turn on the second switch and supply power to the PFC control circuit based on the on state of the second switch. The electronic device may operate the PFC circuit using the power supplied to the PFC control circuit and transmit the power converted to DC to the converter section through the PFC circuit. The electronic device controls the voltage output from the PFC section to supply power (S1330). The control method of the electronic device according to the various embodiments described above may be provided as a computer program product. A computer program product may include the S / W program itself or a non-transitory computer readable medium on which the S / W program is stored. A non-transitory computer readable medium refers to a medium that stores data semi-permanently and is readable by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specifically, the various applications or programs described above may be provided by being stored on a non-transitory computer readable medium such as a CD, DVD, hard disk, Blu-ray disc, USB, memory card, or ROM. Furthermore, although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art to which the disclosure belongs without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure. Explanation of the symbols 100: Electronic device 210: Projection unit 220: Memory 230: User interface 240: Input / output interface 250: Audio output unit 260: Power supply unit 270: Processor

Claims

Claim 1 An electronic device comprising: a converter unit that converts AC power into DC power; a PFC unit including a PFC circuit and a PFC control circuit; and a converter unit; wherein the converter unit controls the voltage output from the PFC unit using a transformer to supply power through an output terminal, and when the electronic device operates as a multimedia function, a first switch included in the converter unit is set to a first state, and when the electronic device operates as a lighting function, the first switch is set to a second state, the PFC unit controls the PFC control circuit based on the state of the first switch, and the PFC control circuit controls the PFC circuit based on the state between the power terminal and ground of the PFC control circuit, and the state between the power terminal and ground is different depending on whether the first switch is in a first state or a second state. Claim 2 In claim 1, the first switch is an electronic device connected in parallel between the power terminal and ground of the PFC control circuit. Claim 3 An electronic device according to paragraph 2, wherein the PFC unit includes a bypass circuit that bypasses the PFC circuit, and when operating as a multimedia function, cuts off the power supplied to the PFC control circuit based on the first state of the first switch, stops the operation of the PFC circuit according to the cutoff of the power supplied to the PFC control circuit, and transmits the power converted into DC power to the converter unit through the bypass circuit. Claim 4 An electronic device according to paragraph 2, wherein the PFC unit supplies power to the PFC control circuit based on the second state of the first switch when operating as a lighting function, and operates the PFC circuit by the power supplied to the PFC control circuit to transmit the power converted into the DC power to the converter unit through the PFC circuit. Claim 5 In claim 1, the first switch is an electronic device comprising a photocoupler. Claim 6 An electronic device comprising: a converter unit that converts AC power into DC power; a PFC unit including a PFC circuit and a PFC control circuit; and a converter unit; wherein the converter unit controls the voltage output from the PFC unit using a transformer to supply power through an output terminal, and when the electronic device operates as a multimedia function, a first switch included in the converter unit is set to a first state, and when the electronic device operates as a lighting function, the first switch is set to a second state, and the PFC unit controls the PFC control circuit based on the state of the first switch, and the PFC unit further comprises a comparator, an AND gate, and a second switch, wherein the second switch is connected to the power terminal of the PFC control circuit and is controlled according to the output signal of the AND gate, the input terminal of the AND gate is connected to the output terminal of the comparator and one terminal of the first switch of the converter unit, and the other terminal of the first switch is connected to ground. Claim 7 In claim 6, the AND gate sets the second switch to a first state based on a signal based on the second state of the first switch and a signal output from the comparator when the converted DC voltage is greater than or equal to a preset value when the electronic device operates as a lighting function, and the PFC unit supplies power to the PFC control circuit based on the first state of the second switch, and operates the PFC circuit by the power supplied to the PFC control circuit to transmit the power converted to DC to the converter unit through the PFC circuit. Claim 8 An electronic device comprising: a converter unit that converts AC power into DC; a PFC unit including a PFC circuit, a PFC control circuit, a first comparator, an AND gate, and a second switch; and a converter unit including an output current monitoring circuit; wherein the second switch is connected to a power terminal of the PFC control circuit and is controlled according to an output signal of the AND gate, the input terminal of the AND gate is connected to an output terminal of the first comparator and one terminal of the first switch of the converter unit, and the other terminal of the first switch is connected to ground; the converter unit controls a voltage output from the PFC unit using a transformer to supply power through an output terminal, identifies an output current of the power output to the output terminal using the output current monitoring circuit, and controls the first switch based on the identified output current; and the PFC unit controls the second switch based on a signal based on the state of the first switch and a signal output from the first comparator to control the power supplied to the PFC control circuit. Claim 9 An electronic device according to claim 8, wherein the output current monitoring circuit further comprises an amplifier and a second comparator, wherein the amplifier has a first resistor connected in parallel between its input terminals and controls the voltage applied to the first resistor and transmits it to the second comparator, and the second comparator outputs a second state signal when the output current is less than or equal to a preset value based on the voltage value transmitted from the amplifier and the sensed output voltage value. Claim 10 In claim 9, the PFC unit controls the power supplied to the PFC control circuit by controlling the second switch based on the signal output from the first comparator and the signal output from the second comparator when the converted DC voltage is greater than or equal to a preset reference value. Claim 11 A method for controlling an electronic device comprises: a step of converting AC power into DC power; a step of controlling a PFC unit; and a step of supplying power by controlling the voltage output from the PFC unit using a transformer in a converter unit; wherein the step of controlling the PFC unit comprises setting a first switch included in the converter unit to a first state when the electronic device operates as a multimedia function, and setting the first switch to a second state when the electronic device operates as a lighting function, controlling the PFC control circuit of the PFC unit based on the state of the first switch, and controlling the PFC circuit of the PFC unit based on the state between the power terminal and ground of the PFC control circuit, wherein the state between the power terminal and ground is different depending on whether the first switch is in a first state or a second state. Claim 12 In claim 11, the step of controlling the PFC unit is a method for controlling an electronic device, wherein, when operating as a multimedia function, the power supplied to the PFC control circuit is cut off based on the first state of the first switch, and the operation of the PFC circuit is stopped in accordance with the cut-off of the power supplied to the PFC control circuit, thereby transmitting the power converted into the DC power to the converter unit through a bypass circuit. Claim 13 In claim 11, the step of controlling the PFC unit comprises supplying power to the PFC control circuit based on the second state of the first switch when operating as a lighting function, operating the PFC circuit by the power supplied to the PFC control circuit, and transmitting the power converted into the DC power to the converter unit through the PFC circuit. Claim 14 In claim 11, the step of controlling the PFC unit comprises, when operating as a lighting function, setting the second switch included in the PFC unit to a first state based on a signal based on the second state of the first switch and a signal output from a comparator included in the PFC unit when the converted DC voltage is greater than or equal to a preset value, supplying power to the PFC control circuit based on the first state of the second switch, and operating the PFC circuit by the power supplied to the PFC control circuit to transmit the power converted to DC to the converter unit through the PFC circuit.

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