Image display device and operation method thereof

Abstract

The present disclosure relates to an image display device and an operation method thereof. The image display device according to an embodiment of the present disclosure may comprise: a display; a power supply unit which supplies driving power to the display; and a control unit, wherein: the power supply unit comprises a power factor correction (PFC) circuit including at least one boost converter, a current detection circuit which detects a current flowing through the PFC circuit, and a voltage detection circuit which detects a voltage applied to the PFC circuit; and the controller determines a compensation coefficient corresponding to an image output through the display, and calculates power consumption of the image display device on the basis of a current value detected through the current detection circuit, a voltage value detected through the voltage detection circuit, and the compensation coefficient.

Description

Video display device and its operating method

[0001] The present disclosure relates to a video display device and an operating method thereof.

[0002] A video display device is a device that displays images for the user to view. For example, a video display device may include a television (TV), monitor, or notebook computer equipped with a liquid crystal display (LCD) using liquid crystals or an organic light-emitting diode (OLED) display using organic light-emitting diodes (OLED).

[0003] Typically, electronic devices, such as video display devices, are equipped with a power supply unit (PSU) that supplies operating power. Furthermore, electronic devices that utilize AC power may incorporate features designed to efficiently utilize power. For example, such devices may include a power factor correction (PFC) circuit that compensates for the power factor of the input power.

[0004] Meanwhile, to accurately detect the amount of power consumed by an electronic device, the voltage applied to the input terminal and the current flowing through the input terminal are detected, respectively, to calculate the device's power consumption. However, placing separate voltage or current sensors at the input terminal to detect the device's power consumption leads to problems such as larger electronic devices, higher production costs, and more complex implementation.

[0005] The present disclosure aims to solve the above-mentioned and other problems.

[0006] Another purpose is to provide an image display device and an operating method thereof that can calculate power consumption based on data used for control of a PFC circuit without additionally arranging a separate sensor for calculating power consumption.

[0007] Another purpose is to provide a video display device and its operating method that can accurately calculate power consumption based on the type of PFC circuit.

[0008] Another purpose is to provide an image display device and an operating method thereof that can accurately calculate power consumption based on a compensation coefficient corresponding to an image.

[0009] In order to achieve the above object, an image display device according to one embodiment of the present disclosure comprises: a display; a power supply unit for supplying driving power to the display; and a control unit, wherein the power supply unit comprises: a PFC (Power Factor Correction) circuit including at least one boost converter; a current detection circuit for detecting a current flowing in the PFC circuit; and a voltage detection circuit for detecting a voltage applied to the PFC circuit, wherein the control unit determines a compensation coefficient corresponding to an image output through the display, and calculates power consumption of the image display device based on a current value detected through the current detection circuit, a voltage value detected through the voltage detection circuit, and the compensation coefficient.

[0010] In order to achieve the above object, an operating method of an image display device according to one embodiment of the present disclosure may include an operation of monitoring a current value for a current flowing in a PFC (Power Factor Correction) circuit including at least one boost converter and a voltage value for a voltage applied to the PFC circuit; an operation of determining a compensation coefficient corresponding to an image output through a display; and an operation of calculating power consumption of the image display device based on the current value, the voltage value, and the compensation coefficient.

[0011] The effects of the video display device and its operating method according to the present disclosure are described as follows.

[0012] According to at least one embodiment of the present disclosure, power consumption can be calculated based on data used for control of a PFC circuit without additionally arranging a separate sensor for calculating power consumption.

[0013] According to at least one embodiment of the present disclosure, power consumption can be more accurately calculated based on the type of PFC circuit.

[0014] According to at least one embodiment of the present disclosure, power consumption can be accurately calculated based on a compensation coefficient corresponding to an image.

[0015] Further scope of the applicability of the present disclosure will become apparent from the detailed description below. However, since various modifications and variations within the spirit and scope of the present disclosure will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only.

[0016] FIG. 1 is a diagram illustrating an image display system according to one embodiment of the present disclosure.

[0017] Figure 2 is an internal block diagram of the image display device of Figure 1.

[0018] Figure 3 is an internal block diagram of the control unit of Figure 2.

[0019] Figure 4 is an internal block diagram of the power supply unit of Figure 2.

[0020] FIGS. 5 and 6 are internal circuit diagrams of a PFC circuit according to various embodiments of the present disclosure.

[0021] FIG. 7 is a flowchart of an operation method of an image display device according to one embodiment of the present disclosure.

[0022] FIGS. 8 to 14 are drawings for reference in explaining the operation of a video display device according to one embodiment of the present disclosure.

[0023] Hereinafter, the present disclosure will be described in detail with reference to the drawings. In the drawings, portions irrelevant to the description are omitted to clearly and concisely describe the present disclosure, and the same reference numerals are used for identical or extremely similar portions throughout the specification.

[0024] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0025] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0026] Additionally, while terms such as "first" and "second" may be used in this specification to describe various elements, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0027] FIG. 1 is a diagram illustrating an image display system according to various embodiments of the present disclosure.

[0028] Referring to FIG. 1, the image display system (10) may include an image display device (100) and / or a remote control device (200).

[0029] The image display device (100) may be a device that processes and outputs an image. The image display device (100) is not particularly limited as long as it can output a screen corresponding to an image signal, such as a TV, a notebook computer, or a monitor.

[0030] The video display device (100) can receive a broadcast signal, process the signal, and output the processed broadcast image. When the video display device (100) receives a broadcast signal, the video display device (100) may correspond to a broadcast receiving device.

[0031] The video display device (100) can receive broadcast signals wirelessly via an antenna, or can receive broadcast signals wired via a cable. For example, the video display device (100) can receive terrestrial broadcast signals, satellite broadcast signals, cable broadcast signals, IPTV (Internet Protocol Television) broadcast signals, etc.

[0032] The remote control device (200) can be connected to the image display device (100) by wire and / or wirelessly, and can provide various control signals to the image display device (100). At this time, the remote control device (200) can include a device that establishes a wired or wireless network with the image display device (100), and transmits various control signals to the image display device (100) through the established network, or receives signals related to various operations processed in the image display device (100) from the image display device (100).

[0033] For example, various input devices such as a mouse, keyboard, space remote control, trackball, joystick, etc. can be used as the remote control device (200). The remote control device (200) can be referred to as an external device, and it is to be noted in advance that external devices and remote control devices can be used interchangeably as needed.

[0034] The video display device (100) can be connected to only a single remote control device (200) or can be connected to two or more remote control devices (200) simultaneously, and can change objects displayed on the screen or adjust the status of the screen based on control signals provided from each remote control device (200).

[0035] Meanwhile, the video display system (10) may further include at least one server (400). The video display device (100) may transmit and receive data with the server (400). For example, the video display device (100) may transmit and receive data with the server (400) via a network such as the Internet.

[0036] The video display device (100) can transmit data related to an operation performed according to a user input to the server (400), and the server (400) can store the data received from the video display device (100).

[0037] Figure 2 is an internal block diagram of the image display device of Figure 1.

[0038] Referring to FIG. 2, the video display device (100) may include a broadcast receiving unit (105), an external device interface unit (130), a network interface unit (135), a storage unit (140), a user input interface unit (150), an input unit (160), a control unit (170), a display (180), an audio output unit (185), and / or a power supply unit (190).

[0039] The broadcast receiving unit (105) may include a tuner unit (110) and a demodulator unit (120).

[0040] Meanwhile, unlike the drawing, the image display device (100) may include only the broadcast reception unit (105) and the external device interface unit (130) among the broadcast reception unit (105), the external device interface unit (130), and the network interface unit (135). That is, the image display device (100) may not include the network interface unit (135).

[0041] The tuner unit (110) can select a broadcast signal corresponding to a channel selected by the user or all previously stored channels among broadcast signals received via an antenna (not shown) or a cable (not shown). The tuner unit (110) can convert the selected broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0042] For example, the tuner unit (110) can convert the selected broadcast signal into a digital IF signal (DIF) if it is a digital broadcast signal, and can convert it into an analog baseband video or audio signal (CVBS / SIF) if it is an analog broadcast signal. That is, the tuner unit (110) can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner unit (110) can be directly input to the control unit (170).

[0043] Meanwhile, the tuner unit (110) can sequentially select broadcast signals of all broadcast channels stored through the channel memory function among the received broadcast signals and convert them into intermediate frequency signals or baseband video or audio signals.

[0044] Meanwhile, the tuner unit (110) may be equipped with multiple tuners to receive broadcast signals of multiple channels. Alternatively, a single tuner that simultaneously receives broadcast signals of multiple channels is also possible.

[0045] The demodulation unit (120) can perform a demodulation operation by receiving a digital IF signal (DIF) converted by the tuner unit (110).

[0046] The demodulation unit (120) can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, an audio signal, or a data signal is multiplexed.

[0047] The stream signal output from the demodulation unit (120) can be input to the control unit (170). The control unit (170) can output an image through the display (180) and output an audio through the audio output unit (185) after performing demultiplexing, image / audio signal processing, etc.

[0048] The external device interface unit (130) can transmit or receive data with a connected external device. To this end, the external device interface unit (130) may include an A / V input / output unit (not shown).

[0049] The external device interface unit (130) can be connected to external devices such as a DVD (Digital Versatile Disk), Blu-ray, game device, camera, camcorder, computer (laptop), set-top box, etc., via wired / wireless connection, and can also perform input / output operations with the external devices.

[0050] In addition, the external device interface unit (130) can establish a communication network with various remote control devices (200) as illustrated in FIG. 1, and receive a control signal related to the operation of the image display device (100) from the remote control device (200) or transmit data related to the operation of the image display device (100) to the remote control device (200).

[0051] The A / V input / output unit can receive video and audio signals from an external device. For example, the A / V input / output unit can include an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), a DVI (Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an MHL (Mobile High-definition Link) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, an SPDIF terminal, a Liquid HD terminal, etc. Digital signals input through these terminals can be transmitted to the control unit (170). At this time, analog signals input through the CVBS terminal and the S-video terminal can be converted into digital signals through an analog-to-digital converter (not shown) and transmitted to the control unit (170).

[0052] The external device interface unit (130) may include a wireless communication unit (not shown) for short-range wireless communication with other electronic devices. Through this wireless communication unit, the external device interface unit (130) can exchange data with an adjacent mobile terminal. For example, in mirroring mode, the external device interface unit (130) may receive device information, running application information, application images, etc. from the mobile terminal.

[0053] The external device interface unit (130) can perform short-range wireless communication using Bluetooth, RFID (Radio Frequency Identification), infrared communication (IrDA, infrared Data Association), UWB (Ultra-Wideband), ZigBee, etc.

[0054] The network interface unit (135) can provide an interface for connecting the video display device (100) to a wired / wireless network including the Internet.

[0055] The network interface unit (135) may include a communication module (not shown) for connection to a wired / wireless network. For example, the network interface unit (135) may include a communication module for WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed ​​Downlink Packet Access), etc.

[0056] The network interface unit (135) can transmit or receive data to or from other users or other electronic devices via the connected network or another network linked to the connected network.

[0057] The network interface unit (135) can receive web content or data provided by a content provider or network operator. That is, the network interface unit (135) can receive web content such as movies, advertisements, games, VOD, broadcast signals, and other information related thereto provided from a content provider or network provider via a network.

[0058] The network interface unit (135) can receive firmware update information and update files provided by the network operator, and transmit data to the Internet or content provider or network operator.

[0059] The network interface unit (135) can select and receive a desired application from among applications open to the public through a network.

[0060] The storage unit (140) may store programs for signal processing and control within the control unit (170), or may store processed video, audio, or data signals. For example, the storage unit (140) may store application programs designed for the purpose of performing various tasks that can be processed by the control unit (170), and may selectively provide some of the stored application programs upon request from the control unit (170).

[0061] Programs stored in the storage unit (140) are not particularly limited as long as they can be executed by the control unit (170).

[0062] The storage unit (140) may also perform a function for temporarily storing video, audio, or data signals received from an external device through the external device interface unit (130).

[0063] The storage unit (140) can store information about a specific broadcast channel through a channel memory function such as a channel map.

[0064] Although the storage unit (140) of FIG. 2 is provided separately from the control unit (170), the scope of the present disclosure is not limited thereto, and the storage unit (140) may be included within the control unit (170).

[0065] The storage unit (140) may include at least one of volatile memory (e.g., DRAM, SRAM, SDRAM, etc.) or non-volatile memory (e.g., flash memory, hard disk drive (HDD), solid-state drive (SSD), etc.). In various embodiments of the present disclosure, the storage unit (140) and memory may be used interchangeably.

[0066] The user input interface unit (150) can transmit a signal input by the user to the control unit (170) or transmit a signal from the control unit (170) to the user.

[0067] For example, a user input signal such as power on / off, channel selection, screen setting, etc. may be transmitted / received from a remote control device (200), a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, a setting key, etc. may be transmitted to the control unit (170), a user input signal input from a sensor unit (not shown) that senses a user's gesture may be transmitted to the control unit (170), or a signal from the control unit (170) may be transmitted to the sensor unit.

[0068] The input unit (160) may be provided on one side of the main body of the video display device (100). For example, the input unit (160) may include a touch pad, a physical button, etc.

[0069] The input unit (160) can receive various user commands related to the operation of the video display device (100) and transmit a control signal corresponding to the input command to the control unit (170).

[0070] The input unit (160) may include at least one microphone (not shown) and may receive the user's voice through the microphone.

[0071] The control unit (170) may include at least one processor, and may control the overall operation of the image display device (100) using the processor included therein. Here, the processor may be a general processor such as a central processing unit (CPU). Of course, the processor may be a dedicated device such as an ASIC or another hardware-based processor.

[0072] The control unit (170) can demultiplex a stream input through the tuner unit (110), the demodulator unit (120), the external device interface unit (130), or the network interface unit (135), or process the demultiplexed signals to generate and output a signal for video or audio output.

[0073] The display (180) can generate a driving signal by converting a video signal, data signal, OSD signal, control signal, etc. processed by the control unit (170) or a video signal, data signal, control signal, etc. received from the external device interface unit (130).

[0074] The display (180) may include a display panel (not shown) having a plurality of pixels.

[0075] The plurality of pixels provided on the display panel may have RGB sub-pixels. Alternatively, the plurality of pixels provided on the display panel may have RGBW sub-pixels. The display (180) may convert image signals, data signals, OSD signals, control signals, etc. processed by the control unit (170) to generate driving signals for the plurality of pixels.

[0076] The display (180) can be a PDP (Plasma Display Panel), an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diode), a flexible display, etc., and may also be a 3D display. The 3D display (180) can be divided into a glasses-free type and a glasses type.

[0077] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0078] The audio output unit (185) receives a signal processed by the control unit (170) and outputs it as voice.

[0079] The image signal processed by the control unit (170) can be input to the display (180) and displayed as an image corresponding to the image signal. In addition, the image signal processed by the control unit (170) can also be input to an external output device through the external device interface unit (130).

[0080] The voice signal processed in the control unit (170) can be output as sound to the audio output unit (185). In addition, the voice signal processed in the control unit (170) can be input to an external output device through the external device interface unit (130).

[0081] Although not shown in FIG. 2, the control unit (170) may include a demultiplexing unit, an image processing unit, etc. This will be described later with reference to FIG. 3.

[0082] In addition, the control unit (170) can control the overall operation within the video display device (100). For example, the control unit (170) can control the tuner unit (110) to select (tune) a broadcast corresponding to a channel selected by the user or a previously stored channel.

[0083] In addition, the control unit (170) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0084] Meanwhile, the control unit (170) can control the display (180) to display an image. At this time, the image displayed on the display (180) may be a still image or a moving image, and may be a 2D image or a 3D image.

[0085] Meanwhile, the control unit (170) can cause a predetermined 2D object to be displayed within an image displayed on the display (180). For example, the object can be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

[0086] Meanwhile, the image display device (100) may further include a camera (not shown). The camera can capture images of a user. The camera can be implemented with a single camera, but is not limited thereto, and may also be implemented with multiple cameras. Meanwhile, the camera can be embedded in the image display device (100) above the display (180) or can be separately positioned. Image information captured by the camera can be input to the control unit (170).

[0087] The control unit (170) can recognize the user's location based on the image captured by the camera. For example, the control unit (170) can determine the distance (z-axis coordinate) between the user and the image display device (100). In addition, the control unit (170) can determine the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location.

[0088] The control unit (170) can detect the user's gesture based on an image captured from the camera unit, a signal detected from the sensor unit, or a combination thereof.

[0089] The power supply unit (190) can supply power to the entire image display device (100). In particular, it can supply power to a control unit (170) that can be implemented in the form of a system on chip (SOC), a display (180) for image display, and an audio output unit (185) for audio output.

[0090] Specifically, the power supply unit (190) may be equipped with a converter (not shown) that converts AC power into DC power and a Dc / Dc converter (not shown) that converts the level of DC power.

[0091] The remote control device (200) can transmit user input to the user input interface unit (150). To this end, the remote control device (200) can use Bluetooth, RF (Radio Frequency) communication, infrared (Infrared Radiation) communication, UWB (Ultra-wideband), ZigBee, etc. In addition, the remote control device (200) can receive images, voices, or data signals output from the user input interface unit (150) and display or output the same as voice on the remote control device (200).

[0092] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0093] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is only a block diagram for one embodiment of the present disclosure, and each component of the block diagram may be integrated, added, or omitted depending on the specifications of the image display device (100) actually implemented.

[0094] That is, two or more components may be combined into a single component, or a single component may be subdivided into two or more components, as needed. Furthermore, the functions performed by each block are intended to illustrate embodiments of the present disclosure, and their specific operations or devices do not limit the scope of the present disclosure.

[0095] Figure 3 is an internal block diagram of the control unit of Figure 2.

[0096] Referring to FIG. 3, a control unit (170) according to one embodiment of the present disclosure may include a demultiplexer (310), an image processing unit (320), a processor (330), an OSD generation unit (340), a mixer (345), a frame rate conversion unit (350), and / or a formatter (360). In addition, an audio processing unit (not shown) and a data processing unit (not shown) may be further included.

[0097] The demultiplexer (310) can demultiplex an input stream. For example, when MPEG-2 TS is input, it can be demultiplexed to separate it into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer (310) may be a stream signal output from the tuner (110), the demodulator (120), or the external device interface (130).

[0098] The image processing unit (320) can perform image processing of a demultiplexed image signal. To this end, the image processing unit (320) may be equipped with an image decoder (325) and a scaler (335).

[0099] The video decoder (325) can decode a demultiplexed video signal, and the scaler (335) can perform scaling so that the resolution of the decoded video signal can be output on the display (180).

[0100] The video decoder (325) may include decoders of various standards. For example, it may include an MPEG-2, H.264 decoder, a 3D video decoder for color images and depth images, a decoder for multi-view images, etc.

[0101] The processor (330) can control the overall operation within the video display device (100) or the control unit (170). For example, the processor (330) can control the tuner (110) to select (tune) a broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0102] In addition, the processor (330) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0103] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0104] Additionally, the processor (330) can control the operation of the demultiplexing unit (310), the image processing unit (320), the OSD generation unit (340), etc. within the control unit (170).

[0105] The OSD generation unit (340) can generate OSD signals based on user input or on its own. For example, based on a user input signal input through the input unit (160), it can generate signals for displaying various information in the form of graphics or text on the screen of the display (180).

[0106] The generated OSD signal may include various data such as the user interface screen of the video display device (100), various menu screens, widgets, icons, etc. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0107] Additionally, the OSD generation unit (340) can generate a pointer that can be displayed on the display (180) based on a pointing signal input from the remote control device (200).

[0108] The OSD generation unit (340) may include a pointing signal processing unit (not shown) that generates a pointer. It is also possible for the pointing signal processing unit (not shown) to be provided separately rather than within the OSD generation unit (240).

[0109] The mixer (345) can mix the OSD signal generated by the OSD generation unit (340) and the decoded image signal processed by the image processing unit (320). The mixed image signal can be provided to the frame rate conversion unit (350).

[0110] The frame rate converter (FRC) (350) can convert the frame rate of an input video. Meanwhile, the frame rate converter (350) can also output the video as is without a separate frame rate conversion.

[0111] The formatter (360) can arrange left-eye image frames and right-eye image frames of a frame rate-converted 3D image. In addition, it can output a synchronization signal (Vsync) for opening the left-eye glasses and right-eye glasses of a 3D viewing device (not shown).

[0112] Meanwhile, the formatter (360) can change the format of the input video signal into a video signal for display on the display (180) and output it.

[0113] Additionally, the formatter (360) can change the format of a 3D video signal. For example, it can change the format to any one of various 3D formats, such as a side-by-side format, a top-down format, a frame sequential format, an interlaced format, and a checker box format.

[0114] Meanwhile, the formatter (360) can also convert a 2D image signal into a 3D image signal. For example, according to a 3D image generation algorithm, an edge or a selectable object can be detected within a 2D image signal, and an object or a selectable object according to the detected edge can be separated and generated as a 3D image signal. At this time, the generated 3D image signal can be separated and aligned into a left-eye image signal (L) and a right-eye image signal (R), as described above.

[0115] Meanwhile, although not shown in the drawing, a 3D processor (not shown) for 3D effect signal processing may be further placed after the formatter (360). This 3D processor may process brightness, tint, and color adjustments of the image signal to improve the 3D effect. For example, it may perform signal processing to make the image clear at a close distance and blurry at a long distance. Meanwhile, the function of this 3D processor may be incorporated into the formatter (360) or incorporated into the image processing unit (320).

[0116] Meanwhile, the audio processing unit (not shown) within the control unit (170) can perform audio processing of the demultiplexed audio signal. For this purpose, the audio processing unit (not shown) can be equipped with various decoders.

[0117] Additionally, the audio processing unit (not shown) within the control unit (170) can process bass, treble, volume control, etc.

[0118] A data processing unit (not shown) within the control unit (170) can perform data processing of a demultiplexed data signal. For example, if the demultiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal may be electronic program guide (EPG) information that includes broadcast information such as the start time and end time of a broadcast program broadcast on each channel.

[0119] Meanwhile, the block diagram of the control unit (170) illustrated in FIG. 3 is only a block diagram for one embodiment of the present disclosure, and each component of the block diagram may be integrated, added, or omitted depending on the specifications of the control unit (170) actually implemented.

[0120] In particular, the frame rate conversion unit (350) and the formatter (360) are not provided within the control unit (170), but may be provided separately, or may be provided separately as one module.

[0121] Figure 4 is an internal block diagram of the power supply unit of Figure 2.

[0122] Referring to FIG. 4, the power supply unit (190) may include a rectifier circuit (191), a PFC (Power Factor Correction) circuit (193), and / or a power control unit (195).

[0123] The rectifier circuit (191) can convert the input AC power into DC power and output it. The rectifier circuit (191) can perform a rectification operation by being composed of diodes, etc. For example, if the AC power source (20) is a single-phase AC power source, the rectifier circuit (191) can be composed of four diodes in a bridge configuration, and if the AC power source (20) is a three-phase AC power source, the rectifier circuit (191) can be composed of six diodes in a bridge configuration.

[0124] The PFC circuit (193) can output power by compensating the power factor of the rectified power. For example, the PFC circuit (193) can match the voltage and current of the rectified power in phase.

[0125] The PFC circuit (193) may be a boost topology. For example, the PFC circuit (193) may be implemented as a single-phase PFC circuit including one boost converter. For example, the PFC circuit (193) may be implemented as an interleaved PFC circuit including two boost converters.

[0126] The power supply unit (190) may further include a voltage detection circuit (A) that detects the voltage applied to the PFC circuit (193). For example, the voltage detection circuit (A) may include a resistor element, an OP AMP, etc., to detect the voltage. The voltage detected by the voltage detection circuit (A) may be input to the power control unit (195). For example, the voltage detected by the voltage detection circuit (A) may be input to the power control unit (195) as a discrete signal in the form of a pulse.

[0127] The power control unit (195) can control the PFC circuit (193). The power control unit (195) can control the switching operation of the switching element included in the PFC circuit (193). For example, the power control unit (195) can output a control signal to the switching element based on a pulse width modulation (PWM) method and / or a pulse frequency modulation (PFM) method. At this time, the power control unit (195) can control the switching operation of the switching element by adjusting the duty ratio, switching frequency, etc. of the control signal.

[0128] The power control unit (195) may be included in the control unit (170) or may be a separate component distinct from the control unit (170). For example, the power control unit (195) may be placed on a power board corresponding to the power supply unit (190), and the processor (330) of the control unit (170) may be placed on a main board. At this time, the power control unit (195) and the processor (330) may transmit and receive data to and from each other according to a predetermined communication method. For example, the power control unit (195) and the processor (330) may transmit and receive data to and from each other using UART (Universal asynchronous receiver / transmitter) communication.

[0129] The power control unit (195) can output a control signal to the switching element according to the control of the processor (330). For example, the power control unit (195) can output a control signal to the switching element based on a target value for the driving power transmitted from the processor (330). According to one embodiment, the power control unit (195) can output a control signal based on a voltage applied to the PFC circuit (193), a current flowing in the PFC circuit (193), a voltage output from the PFC circuit (193), etc. For example, the power control unit (195) can perform feed-forward control that outputs a control signal in response to a voltage applied to an input terminal of the PFC circuit (193) and a current flowing in a switching element included in the PFC circuit (193).

[0130] Meanwhile, according to an embodiment, the power supply unit (190) may further include a transformer circuit that transforms the power output from the PFC circuit (193), a current detection circuit that detects the current flowing in the PFC circuit (193), etc. For example, the transformer circuit may include a half bridge LLC resonant converter, a flyback converter, etc. For example, the current detection circuit may transmit a signal corresponding to the current flowing in the inductor included in the PFC circuit (193) to the power control unit (195).

[0131] FIGS. 5 and 6 are internal circuit diagrams of a PFC circuit according to various embodiments of the present disclosure.

[0132] Referring to FIG. 5, a PFC circuit (193) according to one embodiment of the present disclosure may be implemented as a single-phase PFC circuit.

[0133] The PFC circuit (193) may include an inductor (L), a diode (D), and a switching element (Q). The PFC circuit (193) may include a smoothing circuit (Cb). For example, the smoothing circuit (Cb) may be implemented with at least one capacitor.

[0134] One end of the inductor (L) may be electrically connected to the input terminal of the PFC circuit (193), and the other end may be electrically connected to the anode of the diode (D). The cathode of the diode (D) may be electrically connected to the smoothing circuit (Cb). The diode (D) may allow current from the inductor (L) to flow toward the smoothing circuit (Cb), and may block current from the smoothing circuit (Cb) to flow toward the inductor (L).

[0135] The switching element (Q) can be implemented as an insulated gate bipolar transistor (IGBT), a MOSFET, etc. One end of the switching element (Q) can be electrically connected to the other end of the inductor (L) and the anode of the diode (D), and the other end can be electrically connected to ground. The switching element (Q) can be switched under the control of the power control unit (195). The amount of current output from the inductor (L) can be adjusted according to the switching of the switching element (Q). At this time, the amount of current charged as energy in the inductor (L) and then discharged according to the switching of the switching element (Q) is adjusted, so that the power factor of the rectified power can be compensated.

[0136] The power supply unit (190) may include a current detection circuit (B) that detects the current flowing in the inductor (L). For example, the current detection circuit (B) may include a current sensor, a current transformer (CT), a shunt resistor, etc., to detect the current. The current detected by the current detection circuit (B) may be input to the power control unit (195). For example, the current detected by the current detection circuit (B) may be input to the power control unit (195) as a discrete signal in the form of a pulse.

[0137] Referring to FIG. 6, a PFC circuit (193) according to one embodiment of the present disclosure may be implemented as an interleaved PFC circuit.

[0138] The PFC circuit (193) may include a first inductor (L1), a first diode (D1), a first switching element (Q1), a second inductor (L2), a second diode (D2), and a second switching element (Q2). The PFC circuit (193) may include a smoothing circuit (Cb).

[0139] One end of the first inductor (L1) may be electrically connected to the input terminal of the PFC circuit (193), and the other end may be electrically connected to the anode of the first diode (D1). The cathode of the first diode (D1) may be electrically connected to the smoothing circuit (Cb). The first diode (D1) may allow current from the first inductor (L1) to flow toward the smoothing circuit (Cb), and may block current from the smoothing circuit (Cb) to flow toward the first inductor (L1).

[0140] One end of the first switching element (Q1) may be electrically connected to the other end of the first inductor (L1) and the anode of the first diode (D1), and the other end may be electrically connected to ground. The first switching element (Q1) may be switched under the control of the power control unit (195). The amount of current output from the first inductor (L1) may be adjusted according to the switching of the first switching element (Q1). At this time, the amount of current charged as energy in the first inductor (L1) and then discharged according to the switching of the first switching element (Q1) may be adjusted, so that the power factor of the rectified power may be compensated.

[0141] One end of the second inductor (L2) may be electrically connected to the input terminal of the PFC circuit (193), and the other end may be electrically connected to the anode of the second diode (D2). The cathode of the second diode (D2) may be electrically connected to the smoothing circuit (Cb). The second diode (D2) may allow current from the second inductor (L2) to flow toward the smoothing circuit (Cb), and may block current from the smoothing circuit (Cb) to flow toward the second inductor (L2).

[0142] One end of the second switching element (Q2) may be electrically connected to the other end of the second inductor (L2) and the anode of the second diode (D2), and the other end may be electrically connected to ground. The second switching element (Q2) may be switched under the control of the power control unit (195). The amount of current output from the second inductor (L2) may be adjusted according to the switching of the second switching element (Q2). At this time, the amount of current charged as energy to the second inductor (L2) and then discharged according to the switching of the second switching element (Q2) may be adjusted, so that the power factor of the rectified power may be compensated.

[0143] According to one embodiment, the first switching element (Q1) and the second switching element (Q2) can be switched alternately. For example, the second switching element (Q2) can be turned off while the first switching element (Q1) is turned on, and the second switching element (Q2) can be turned on while the first switching element (Q1) is turned off.

[0144] Meanwhile, the power supply unit (190) may include a first current detection circuit (B1) and / or a second detection circuit (B2) that detects the current flowing in the first inductor (L1). The current detected by the first current detection circuit (B1) and / or the second detection circuit (B2) may be input to the power control unit (195).

[0145] FIG. 7 is a flowchart of an operation method of an image display device according to one embodiment of the present disclosure.

[0146] Referring to FIG. 7, the image display device (100) can monitor the voltage applied to the PFC circuit (193) and the current flowing in the PFC circuit (193) in operation S710. For example, the image display device (100) can monitor the voltage applied to the PFC circuit (193) and the current flowing in the PFC circuit (193) through a voltage detection circuit (A) and a current detection circuit (B). Here, the voltage applied to the PFC circuit (193) may be a voltage applied to an input terminal of the PFC circuit (193), and the current flowing in the PFC circuit (193) may be a current flowing in an inductor included in the PFC circuit (193).

[0147] Referring to FIG. 8, the power control unit (195) can detect the voltage (810) applied to the PFC circuit (193) through the voltage detection circuit (A). The power control unit (195) can detect the current (820) flowing in the PFC circuit (193) through the current detection circuit (B). At this time, the phase difference between the voltage (810) applied to the PFC circuit (193) and the current (820) flowing in the PFC circuit (193) can be minimized by the PFC circuit (193). For example, at a first time point (t1) and a second time point (t2) when the voltage (810) applied to the PFC circuit (193) is a peak value (Vpeak), the current (820) flowing in the PFC circuit (193) can be a peak value (Ipeak).

[0148] The power control unit (195) can confirm the point in time when the voltage (810) applied to the PFC circuit (193) is 0. The power control unit (195) can confirm the point in time when the current (820) flowing in the PFC circuit (193) is 0.

[0149] The power control unit (195) can detect the peak value (Vpeak) of the voltage (810) applied to the PFC circuit (193). For example, the power control unit (195) can determine the increase or decrease of the voltage (810) applied to the PFC circuit (193) by comparing the voltage value detected immediately before with the voltage value detected currently. At this time, the power control unit (195) can detect the peak value (Vpeak) of the voltage (810) by confirming the point in time when the decrease in the voltage (810) applied to the PFC circuit (193) begins.

[0150] The power control unit (195) can detect the peak value (Ipeak) of the current (820) flowing in the PFC circuit (193). For example, the power control unit (195) can determine the increase or decrease of the current (820) flowing in the PFC circuit (193) by comparing the current value detected immediately before with the current value detected currently. At this time, the power control unit (195) can detect the peak value (Ipeak) of the current (820) by confirming the point in time when the decrease in the current (820) flowing in the PFC circuit (193) begins.

[0151] The image display device (100) can determine a compensation coefficient corresponding to the image in operation S720. Here, the compensation coefficient may be a coefficient used to calculate the power consumption of the image display device (100). In the following, an OLED panel is used as an example for explanation.

[0152] The image display device (100) can determine the luminance (hereinafter, output luminance) of the image output through the display (180). At this time, the image display device (100) can determine a compensation coefficient corresponding to the output luminance of the image. Here, luminance can be used as a concept identical to brightness. That is, the compensation coefficient can be adjusted according to the brightness of the screen output through the display (180). For example, the image display device (100) can determine the compensation coefficient based on a lookup table corresponding to the output luminance of the image and the compensation coefficient. At this time, the lookup table can be configured differently for each device depending on the performance of the image display device (100), etc.

[0153] According to one embodiment, the control unit (170) of the image display device (100) can calculate an average brightness level (APL) for an image frame based on an image signal. At this time, the higher the average brightness level (APL), the higher the output brightness.

[0154] According to one embodiment, the control unit (170) of the image display device (100) can adjust the output brightness based on the mode (hereinafter, “screen mode”) for the brightness of the screen output through the display (180). At this time, when the screen mode is set to a first mode that outputs the screen relatively darkly, the output brightness of a predetermined image can be determined as a first brightness level. On the other hand, when the screen mode is set to a second mode that outputs the screen relatively brightly, the output brightness of the predetermined image can be determined as a second brightness level that is higher than the first brightness level.

[0155] According to one embodiment, the control unit (170) of the image display device (100) can set the brightness of the screen output through the display (180) based on a user input received through the user input interface unit (150). At this time, the lower the brightness of the screen set according to the user input, the lower the output luminance of a predetermined image output through the display (180).

[0156] Meanwhile, the brightness of the screen output through the display (180) may correspond to the driving power supplied to the display. For example, the processor (330) of the control unit (170) may transmit data on the output brightness of the image to the power control unit (195). At this time, the power control unit (195) may output a control signal to the switching element of the PFC circuit (193) based on the data on the output brightness of the image.

[0157] Depending on the control of the power control unit (195) for the PFC circuit (193), as the output brightness of the image increases, the driving current and / or driving voltage supplied to the OLED panel may increase. In addition, as the brightness of the screen output through the display (180) increases, the power consumption of the image display device (100) may increase.

[0158] Referring to FIG. 9, the image display device (100) can output a predetermined image (910) having a relatively low output brightness through the display (180). At this time, the level of the driving current and / or driving voltage supplied to the OLED panel may be relatively low. In other words, the power consumption of the image display device (100) according to the output of the predetermined image (910) having a low output brightness may be relatively small.

[0159] Meanwhile, referring to FIG. 10, the image display device (100) can output a predetermined image (1010) having a relatively high output brightness through the display (180). At this time, the level of the driving current and / or driving voltage supplied to the OLED panel may be relatively high. In other words, the power consumption of the image display device (100) according to the output of the predetermined image (1010) having a high output brightness may be relatively large.

[0160] Referring to Fig. 11, the power control unit (195) of the power supply unit (190) can output a control signal to a switching element included in the PFC circuit (193). The switching element included in the PFC circuit (193) can perform a switching operation according to the voltage value of the control signal.

[0161] Referring to the reference numeral 1101 of FIG. 11, when a predetermined image (910) with low output luminance is output, a switching element included in a PFC circuit (193) may be intermittently switched. At this time, the power control unit (195) may output a control signal to the switching element included in the PFC circuit (193) according to a burst mode and / or a pulse-skipping mode. Here, the burst mode may be a mode in which the switching element performs switching for a certain period of time and then stops switching for a certain period of time. The pulse-skipping mode may be a mode in which some switching of the switching element is omitted. For example, when a predetermined image (910) with low output luminance is output, the switching frequency of the control signal may be relatively small. For example, when a predetermined image (910) with low output luminance is output, the duty ratio of the control signal may be relatively small.

[0162] Referring to the drawing reference numeral 1102 of FIG. 11, when a predetermined image (1010) having a high output brightness is output, the switching element included in the PFC circuit (193) may be continuously switched. For example, when a predetermined image (1010) having a high output brightness is output, the switching frequency of the control signal may be relatively high. For example, when a predetermined image (1010) having a high output brightness is output, the duty ratio of the control signal may be relatively high.

[0163] Referring to Fig. 12, the current flowing in the PFC circuit (193) may change depending on the switching of the switching element included in the PFC circuit (193). For example, when the switching element included in the PFC circuit (193) is turned on, the current flowing in the inductor included in the PFC circuit (193) may increase. When the switching element included in the PFC circuit (193) is turned off, the current flowing in the inductor included in the PFC circuit (193) may decrease.

[0164] Referring to the drawing symbol 1201 of FIG. 12, when the switching element included in the PFC circuit (193) is intermittently switched in response to the output of a predetermined image (910) having low output brightness, the peak value of the current flowing in the PFC circuit (193) may correspond to a predetermined value (I1).

[0165] Meanwhile, referring to the drawing symbol 1202 of FIG. 12, when the switching element included in the PFC circuit (193) is continuously switched in response to the output of a predetermined image (1010) having a high output brightness, the peak value of the current flowing in the PFC circuit (193) may be less than a predetermined value (I1).

[0166] That is, when the switching element included in the PFC circuit (193) switches intermittently, the peak value of the current flowing in the PFC circuit (193) may be greater than when it switches continuously. Therefore, when the power consumption of the image display device (100) is calculated by multiplying the voltage applied to the PFC circuit (193) and the current flowing in the PFC circuit (193), a value greater than the actual power consumption of the image display device (100) may be calculated as the power consumption of the image display device (100).

[0167] FIG. 13 is a diagram showing a graph of a compensation coefficient corresponding to a case where a PFC circuit of a power control unit according to one embodiment of the present disclosure is implemented as a single-phase PFC circuit.

[0168] Referring to FIG. 13, a compensation coefficient (1300) may be determined in response to the output luminance of an image output through a display (180). The higher the output luminance of the image, the larger the compensation coefficient (1300) may be. This may be a result of considering losses occurring due to the configuration of the image display device (100), such as switching loss and conduction loss of a switching element.

[0169] Hereinafter, according to the output luminance of the image, the image will be described by dividing it into a first section (S1) in which the output luminance of the image is low, a second section (S2) in which the output luminance of the image is medium, and a third section (S3) in which the output luminance of the image is high. The first section (S1) may be a section in which the output luminance of the image is less than the first luminance value (L1), the second section (S2) may be a section in which the output luminance of the image is equal to or greater than the first luminance value (L1) and less than the second luminance value (L2), and the third section (S3) may be a section in which the output luminance of the image is equal to or greater than the second luminance (L2).

[0170] In at least a part of the first section (S1), the compensation coefficient (1300) may be less than 1. For example, when the output luminance of the image is less than a predetermined luminance value, the compensation coefficient (1300) may be less than 1. That is, when the switching element included in the PFC circuit (193) is intermittently switched and the peak value of the current flowing in the PFC circuit (193) is large, the image display device (100) may calculate a value corresponding to the actual power consumption of the image display device (100) as the power consumption of the image display device (100) by using the compensation coefficient (1300) that is less than 1.

[0171] In the second section (S2) and the third section (S3), the compensation coefficient (1300) may be greater than 1. According to one embodiment, the degree to which the compensation coefficient (1300) changes according to the increase or decrease in the output luminance of the image may be greater in the third section (S3) than in the second section (S2). This may be a result of considering the degree of change in loss caused by the configuration within the image display device (100) according to the increase or decrease in the load of the image display device (100).

[0172] The video display device (100) can calculate power consumption in operation S730. For example, the power control unit (195) of the video display device (100) can calculate power consumption by multiplying the peak value of the voltage applied to the PFC circuit (193), the peak value of the current flowing through the PFC circuit (193), and a compensation coefficient.

[0173] The video display device (100) can provide information on power consumption during operation S740. For example, the power control unit (195) of the video display device (100) can transmit the calculated power consumption to the processor (330) of the control unit (170). At this time, the processor (330) can output a message on power consumption through the display (180).

[0174] According to one embodiment, the image display device (100) can transmit data on power consumption to the server (400) through the network interface unit (135). For example, the image display device (100) can transmit data on power consumption to the server (400) every 5 minutes, which is a predetermined period. At this time, the user can check the power consumption of the image display device (100) updated in real time through the server (400) through the user terminal. In addition, the user can adjust the screen mode, screen brightness, etc. of the image display device (100) by using the remote control device (200) or the server (400) in consideration of the power consumption of the image display device (100).

[0175] Referring to FIG. 14, when the PFC circuit (193) according to one embodiment of the present disclosure is implemented as an interleaved PFC circuit, the first switching element (Q1) and the second switching element (Q2) may be switched alternately. At this time, the current (1410) flowing in the PFC circuit (193) may be distributed and flow to the first inductor (L1) and the second inductor (L2). While the first switching element (Q1) is turned on and the current (1420) flowing in the first inductor (L1) increases, the second switching element (Q2) is turned off and the current (1430) flowing in the second inductor (L2) may decrease. Additionally, while the first switching element (Q1) is turned off and the current (1420) flowing in the first inductor (L1) decreases, the second switching element (Q2) is turned on and the current (1430) flowing in the second inductor (L2) can increase.

[0176] When power consumption is calculated based on either the current (1420) flowing in the first inductor (L1) or the current (1430) flowing in the second inductor (L2) and the voltage applied to the PFC circuit (193), a value corresponding to a multiple of the compensation coefficient (1300) illustrated in FIG. 13 can be used as a compensation coefficient for calculating power consumption.

[0177] As described above, according to various embodiments of the present disclosure, power consumption can be calculated based on data used for control of the PFC circuit (193) without additionally arranging a separate sensor for calculating power consumption.

[0178] According to at least one embodiment of the present disclosure, power consumption can be calculated more accurately based on the type of PFC circuit (193).

[0179] According to at least one embodiment of the present disclosure, power consumption can be accurately calculated based on a compensation coefficient corresponding to an image.

[0180] Referring to FIGS. 1 to 14, an image display device (100) according to one aspect of the present disclosure includes a display (180); a power supply unit (190) that supplies driving power to the display (180); and a control unit (195), wherein the power supply unit (190) includes a PFC (Power Factor Correction) circuit (193) including at least one boost converter; a current detection circuit (B) that detects a current flowing in the PFC circuit (193); and a voltage detection circuit (A) that detects a voltage applied to the PFC circuit (193), wherein the control unit (195) determines a compensation coefficient corresponding to an image output through the display (180), and can calculate power consumption of the image display device (100) based on a current value detected through the current detection circuit (B), a voltage value detected through the voltage detection circuit (A), and the compensation coefficient.

[0181] In addition, according to one aspect of the present disclosure, the control unit (195) determines the compensation coefficient in response to the brightness of the image output through the display (180), and the higher the brightness of the image, the higher the compensation coefficient may be.

[0182] In addition, according to one aspect of the present disclosure, the control unit (195) can calculate the power consumption by multiplying the first peak value of the current value, the second peak value of the voltage value, and the compensation coefficient.

[0183] Additionally, according to one aspect of the present disclosure, the compensation coefficient may be less than 1 in a predetermined range in which the luminance of the image is less than a predetermined luminance value.

[0184] In addition, according to one aspect of the present disclosure, the predetermined section may correspond to either a burst mode or a pulse-skipping mode in which a switching element included in the boost converter intermittently switches.

[0185] In addition, according to one aspect of the present disclosure, the current detection circuit (B) detects a current flowing in an inductor included in the boost converter, and the control unit (195) determines a first compensation coefficient corresponding to the brightness of the image when the PFC circuit (193) is a single-phase PFC circuit, and determines a second compensation coefficient corresponding to the brightness of the image when the PFC circuit (193) is an interleaved PFC circuit, and the second compensation coefficient corresponding to a predetermined brightness value may be greater than the first compensation coefficient corresponding to the predetermined brightness value.

[0186] Additionally, according to one aspect of the present disclosure, the second compensation coefficient may correspond to a multiple of the first compensation coefficient.

[0187] In addition, according to one aspect of the present disclosure, the present invention further includes a network interface unit (135) for communicating with an external server (400); and a processor (330) disposed on a main board, wherein the control unit (195) is disposed on a power board corresponding to the power supply unit (190), and the processor (330) can transmit data on the brightness of the image to the control unit (195) and transmit data on the power consumption received from the control unit (195) to the external server (400) through the network interface unit (135) at a predetermined cycle.

[0188] An operating method of an image display device (100) according to one aspect of the present disclosure may include an operation of monitoring a current value for a current flowing in a PFC (Power Factor Correction) circuit (193) including at least one boost converter and a voltage value for a voltage applied to the PFC circuit (193); an operation of determining a compensation coefficient corresponding to an image output through a display (180); and an operation of calculating power consumption of the image display device (100) based on the current value, the voltage value, and the compensation coefficient.

[0189] In addition, according to one aspect of the present disclosure, the operation of determining the compensation coefficient is an operation of determining the compensation coefficient in response to the brightness of the image output through the display (180), and the higher the brightness of the image, the more the compensation coefficient may increase.

[0190] In addition, according to one aspect of the present disclosure, the operation of calculating the power consumption may be an operation of calculating the power consumption by multiplying the first peak value of the current value, the second peak value of the voltage value, and the compensation coefficient.

[0191] In addition, according to one aspect of the present disclosure, the compensation coefficient is less than 1 in a predetermined section in which the brightness of the image is less than a predetermined brightness value, and the predetermined section may correspond to either a burst mode or a pulse-skipping mode in which a switching element included in the boost converter intermittently switches.

[0192] In addition, according to one aspect of the present disclosure, the current flowing in the PFC circuit (193) is a current flowing in an inductor included in the boost converter, and the operation of determining the compensation coefficient includes an operation of determining a first compensation coefficient corresponding to the brightness of the image when the PFC circuit (193) is a single-phase PFC circuit; and an operation of determining a second compensation coefficient corresponding to the brightness of the image when the PFC circuit (193) is an interleaved PFC circuit, and the second compensation coefficient corresponding to a predetermined brightness value may be greater than the first compensation coefficient corresponding to the predetermined brightness value.

[0193] In addition, according to one aspect of the present disclosure, the method may further include transmitting data on the power consumption to an external server (400) at a predetermined cycle.

[0194] The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present disclosure.

[0195] Meanwhile, the operating method of the present disclosure can be implemented as processor-readable code on a processor-readable recording medium. A processor-readable recording medium includes all types of recording devices that store data that can be read by a processor. Examples of processor-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage devices, etc., and also include those implemented in the form of a carrier wave, such as transmission via the Internet. Furthermore, the processor-readable recording medium can be distributed across network-connected computer systems, so that the processor-readable code can be stored and executed in a distributed manner.

[0196] In addition, although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present invention pertains 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 idea or prospect of the present disclosure.

Claims

1. In a video display device, display; A power supply unit for supplying driving power to the above display; and Including a control unit, The above power supply unit, A Power Factor Correction (PFC) circuit including at least one boost converter; A current detection circuit for detecting the current flowing in the above PFC circuit; and A voltage detection circuit for detecting a voltage applied to the above PFC circuit is included, The above control unit, Determine the compensation coefficient corresponding to the image output through the above display, An image display device characterized in that the power consumption of the image display device is calculated based on the current value detected through the current detection circuit, the voltage value detected through the voltage detection circuit, and the compensation coefficient.

2. In paragraph 1, The above control unit, The compensation coefficient is determined in response to the brightness of the image output through the display, An image display device characterized in that the higher the brightness of the image, the higher the compensation coefficient.

3. In paragraph 2, The above control unit, An image display device characterized in that the power consumption is calculated by multiplying the first peak value of the current value, the second peak value of the voltage value, and the compensation coefficient.

4. In paragraph 3, An image display device, characterized in that the compensation coefficient is less than 1 in at least a portion of a predetermined section in which the brightness of the image is less than a predetermined brightness value.

5. In paragraph 4, An image display device, characterized in that at least a portion of the above-described predetermined section corresponds to either a burst mode or a pulse-skipping mode, in which a switching element included in the boost converter intermittently switches.

6. In paragraph 2, The above current detection circuit detects the current flowing in the inductor included in the boost converter, The above control unit, If the above PFC circuit is a single-phase PFC circuit, the first compensation coefficient is determined in response to the brightness of the image, If the above PFC circuit is an interleaved PFC circuit, a second compensation coefficient is determined corresponding to the brightness of the image, An image display device, characterized in that the second compensation coefficient corresponding to a predetermined luminance value is greater than the first compensation coefficient corresponding to the predetermined luminance value.

7. In paragraph 6, An image display device, characterized in that the second compensation coefficient corresponds to a multiple of the first compensation coefficient.

8. In paragraph 2, A network interface section for communicating with an external server; and Including a processor placed on the main board, The above control unit is arranged on a power board corresponding to the power supply unit, The above processor, Transmitting data on the brightness of the above image to the control unit, An image display device characterized in that the data on the power consumption received from the control unit is transmitted to the external server through the network interface unit according to a predetermined cycle.

9. In the operating method of the video display device, An operation of monitoring a current value for a current flowing in a PFC (Power Factor Correction) circuit including at least one boost converter and a voltage value for a voltage applied to the PFC circuit; An operation for determining a compensation coefficient corresponding to an image output through a display; and An operating method of an image display device, characterized by including an operation of calculating power consumption of the image display device based on the current value, the voltage value, and the compensation coefficient.

10. In paragraph 9, The operation for determining the above compensation coefficient is: An operation for determining the compensation coefficient in response to the brightness of the image output through the display, An operating method of an image display device, characterized in that the higher the brightness of the image, the higher the compensation coefficient.

11. In paragraph 10, The operation of calculating the above power consumption is as follows: An operating method of an image display device, characterized in that the operation is to calculate the power consumption by multiplying the first peak value of the current value, the second peak value of the voltage value, and the compensation coefficient.

12. In paragraph 11, The above compensation coefficient is less than 1 in a predetermined section where the brightness of the image is less than a predetermined brightness value. An operating method of an image display device, characterized in that the above-mentioned predetermined section corresponds to either a burst mode or a pulse-skipping mode in which a switching element included in the boost converter intermittently switches.

13. In paragraph 10, The current flowing in the above PFC circuit is the current flowing in the inductor included in the boost converter, The operation for determining the above compensation coefficient is: When the above PFC circuit is a single-phase PFC circuit, an operation of determining a first compensation coefficient corresponding to the brightness of the image; and If the above PFC circuit is an interleaved PFC circuit, it includes an operation of determining a second compensation coefficient corresponding to the brightness of the image, An operating method of an image display device, characterized in that the second compensation coefficient corresponding to a predetermined luminance value is greater than the first compensation coefficient corresponding to the predetermined luminance value.

14. In paragraph 13, An operating method of an image display device, characterized in that the second compensation coefficient corresponds to a multiple of the first compensation coefficient.

15. In paragraph 9, An operating method of an image display device, characterized in that it further includes an operation of transmitting data on the above power consumption to an external server according to a predetermined cycle.

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