Image display device

Abstract

The present disclosure relates to an image display device. The image display device according to one embodiment of the present disclosure comprises: a display; a signal processing device which outputs image signals to the display; a relay element which switches an input AC voltage; a converter which is connected in parallel to one end of the relay element; a micom which operates on the basis of a DC voltage from the converter; and a switch which is disposed between the converter and the signal processing device and operates on the basis of a control signal output from the micom, wherein in a first standby mode, a first level voltage is supplied to the micom on the basis of the relay element being off, the switch being off, and the converter being in operation, and in a second standby mode, a second level voltage, which is higher than the first level voltage, is supplied to the signal processing device on the basis of the relay element being off, the switch being in operation, and the converter being in operation. Accordingly, power consumption in the standby modes can be reduced.

Description

Video display device

[0001] The present disclosure relates to a video display device, and more particularly, to a video display device capable of reducing power consumption in standby mode.

[0002] A video display device is a device that displays images.

[0003] In response to the recent increase in image resolution and image clarity, this is a phenomenon in which the display resolution or peak luminance of a display within an image display device increases.

[0004] Meanwhile, as the display resolution or peak brightness of the display increases, the power consumption of the power supplied to the display increases.

[0005] Meanwhile, various studies are being conducted to reduce power consumption of video display devices in standby mode.

[0006] The problem of the present disclosure is to provide a video display device capable of reducing power consumption in standby mode.

[0007] Another object of the present disclosure is to provide a display device that implements multiple standby modes and can reduce power consumption in each standby mode.

[0008] According to one embodiment of the present disclosure for solving the above problem, a video display device includes a display, a signal processing device for outputting a video signal to the display, a relay element for switching an input AC voltage, a converter connected in parallel to one end of the relay element, a microcomputer that operates based on a DC voltage from the converter, and a switch disposed between the converter and the signal processing device and that operates based on a control signal output from the microcomputer, and in a first standby mode, based on the off of the relay element, the off of the switch, and the operation of the converter, supplies a voltage of a first level to the microcomputer, and in a second standby mode, based on the off of the relay element, the operation of the switch, and the operation of the converter, supplies a voltage of a second level higher than the first level to the signal processing device.

[0009] Meanwhile, the converter can output a voltage of a first level in the first standby mode, and can output a voltage of a second level higher than the first level in the second standby mode.

[0010] Meanwhile, power consumption in the first standby mode may be less than power consumption in the second standby mode.

[0011] Meanwhile, in the first standby mode, the second level voltage is not supplied to the signal processing device.

[0012] Meanwhile, an image display device according to one embodiment of the present disclosure may further include a second converter connected to the other end of the relay element to convert an input AC voltage from the relay element into a DC voltage, and a third converter to convert the level of the DC voltage from the second converter.

[0013] Meanwhile, the third converter can supply a voltage of a third level higher than the second level to the signal processing device based on the on state of the relay element, the operation of the second converter, and the operation of the third converter in the operating mode after the first standby mode or the second standby mode.

[0014] Meanwhile, when switching from the first standby mode to the second standby mode, the switch is turned on so that a second level voltage higher than the first level can be supplied to the signal processing device.

[0015] Meanwhile, when switching from the second standby mode to the first standby mode, the switch is turned off so that the first level voltage can be supplied to the signal processing device.

[0016] Meanwhile, an image display device according to one embodiment of the present disclosure further includes a voltage step-down unit that steps down the level of a DC voltage from a converter to output a voltage of a first level, and in a first standby mode, based on the off of a relay element, the off of a switch, the operation of the converter, and the operation of the voltage step-down unit, supplies the voltage of the first level to a microcomputer, and in a second standby mode, based on the off of the relay element, the operation of the switch, and the operation of the converter, supplies the voltage of a second level higher than the first level to a signal processing device.

[0017] Meanwhile, the converter can output a voltage of a fourth level higher than the first level in the first standby mode, and can output a voltage of a second level higher than the fourth level in the second standby mode.

[0018] Meanwhile, the converter, in the first standby mode, outputs a voltage of a fourth level higher than the first level, and the voltage step-down unit, in the first standby mode, can step down the voltage of the fourth level to the first level.

[0019] Meanwhile, the voltage step-down unit can step down the voltage from the second level to the first level in the second standby mode.

[0020] Meanwhile, the converter may include a flyback converter.

[0021] According to another embodiment of the present disclosure, a video display device includes a display, a signal processing device that outputs a video signal to the display, a relay element that switches an input AC voltage, a converter that is connected in parallel to one end of the relay element, a voltage step-down unit that steps down a level of a DC voltage from the converter, a microcomputer that operates based on the DC voltage from the converter, and a switch that is disposed between the converter and the signal processing device and operates based on a control signal output from the microcomputer, and in a first standby mode, based on the turning off of the relay element, the turning off of the switch, the operation of the converter, and the operation of the voltage step-down unit, supplies a voltage of a first level to the microcomputer, and in a second standby mode, based on the turning off of the relay element, the operation of the switch, and the operation of the converter, supplies a voltage of a second level higher than the first level to the signal processing device.

[0022] Meanwhile, a video display device according to another embodiment of the present disclosure may further include a second converter connected to the other end of the relay element to convert an input AC voltage from the relay element into a DC voltage, and a third converter to convert the level of the DC voltage from the second converter.

[0023] Meanwhile, the third converter can supply a voltage of a third level higher than the second level to the signal processing device based on the on state of the relay element, the operation of the second converter, and the operation of the third converter in the operating mode after the first standby mode or the second standby mode.

[0024] According to one embodiment of the present disclosure, a video display device includes a display, a signal processing device that outputs a video signal to the display, a relay element that switches an input AC voltage, a converter that is connected in parallel to one end of the relay element, a microcomputer that operates based on a DC voltage from the converter, and a switch that is disposed between the converter and the signal processing device and operates based on a control signal output from the microcomputer, and in a first standby mode, based on the off of the relay element, the off of the switch, and the operation of the converter, a voltage of a first level is supplied to the microcomputer, and in a second standby mode, based on the off of the relay element, the operation of the switch, and the operation of the converter, a voltage of a second level higher than the first level is supplied to the signal processing device. Accordingly, power consumption in the standby mode can be reduced. In particular, power consumption can be reduced in each of a plurality of standby modes.

[0025] Meanwhile, the converter can output a voltage of a first level in the first standby mode and a voltage of a second level higher than the first level in the second standby mode. Accordingly, power consumption can be reduced in the first standby mode and the second standby mode.

[0026] Meanwhile, power consumption in the first standby mode may be lower than power consumption in the second standby mode. Accordingly, power consumption in standby mode can be reduced.

[0027] Meanwhile, in the first standby mode, the second level voltage is not supplied to the signal processing device. Accordingly, power consumption in the first standby mode can be reduced.

[0028] Meanwhile, a video display device according to one embodiment of the present disclosure may further include a second converter connected to the other end of the relay element to convert an input AC voltage from the relay element into a DC voltage, and a third converter to convert the level of the DC voltage from the second converter. Accordingly, an operating voltage can be stably supplied to a signal processing device through the third converter.

[0029] Meanwhile, the third converter can supply a voltage of a third level higher than the second level to the signal processing device based on the on state of the relay element, the operation of the second converter, and the operation of the third converter in the operating mode following the first standby mode or the second standby mode. Accordingly, the operating voltage can be stably supplied to the signal processing device through the third converter.

[0030] Meanwhile, when switching from the first standby mode to the second standby mode, the switch is turned on, allowing a second level voltage higher than the first level to be supplied to the signal processing device. Accordingly, power consumption during standby mode can be reduced.

[0031] Meanwhile, when switching from the second standby mode to the first standby mode, the switch is turned off, allowing the first level of voltage to be supplied to the signal processing device. Accordingly, power consumption during standby mode can be reduced.

[0032] Meanwhile, a video display device according to one embodiment of the present disclosure further includes a voltage step-down unit that steps down the level of a DC voltage from a converter to output a voltage of a first level, and in a first standby mode, based on the turning off of a relay element, the turning off of a switch, the operation of a converter, and the operation of the voltage step-down unit, supplies a voltage of the first level to a microcomputer, and in a second standby mode, based on the turning off of a relay element, the operation of a switch, and the operation of a converter, supplies a voltage of a second level higher than the first level to a signal processing device. Accordingly, power consumption in the standby mode can be reduced.

[0033] Meanwhile, the converter can output a fourth level voltage higher than the first level in the first standby mode, and can output a second level voltage higher than the fourth level in the second standby mode. Accordingly, power consumption during standby mode can be reduced.

[0034] Meanwhile, the converter, in the first standby mode, outputs a fourth level voltage higher than the first level, and the voltage step-down unit, in the first standby mode, can step down the fourth level voltage to the first level. Accordingly, power consumption during standby mode can be reduced.

[0035] Meanwhile, the voltage step-down unit can step down the second level voltage to the first level in the second standby mode. Accordingly, power consumption in the standby mode can be reduced.

[0036] Meanwhile, the converter may include a flyback converter, thereby reducing power consumption in standby mode.

[0037] According to another embodiment of the present disclosure, a video display device includes a display, a signal processing device that outputs a video signal to the display, a relay element that switches an input AC voltage, a converter that is connected in parallel to one end of the relay element, a voltage step-down unit that steps down a level of a DC voltage from the converter, a microcomputer that operates based on the DC voltage from the converter, and a switch that is disposed between the converter and the signal processing device and operates based on a control signal output from the microcomputer, and in a first standby mode, based on the turning off of the relay element, the turning off of the switch, the operation of the converter, and the operation of the voltage step-down unit, a voltage of a first level is supplied to the microcomputer, and in a second standby mode, based on the turning off of the relay element, the operation of the switch, and the operation of the converter, a voltage of a second level higher than the first level is supplied to the signal processing device. Accordingly, power consumption in the standby mode can be reduced. In particular, power consumption can be reduced in each of a plurality of standby modes.

[0038] Meanwhile, a video display device according to another embodiment of the present disclosure may further include a second converter connected to the other end of a relay element to convert an input AC voltage from the relay element into a DC voltage, and a third converter to convert the level of the DC voltage from the second converter. Accordingly, an operating voltage can be stably supplied to a signal processing device through the third converter.

[0039] Meanwhile, the third converter can supply a voltage of a third level higher than the second level to the signal processing device based on the on state of the relay element, the operation of the second converter, and the operation of the third converter in the operating mode following the first standby mode or the second standby mode. Accordingly, the operating voltage can be stably supplied to the signal processing device through the third converter.

[0040] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0041] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0042] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0043] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0044] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0045] Figure 5 is an example of an internal block diagram of the display of Figure 2.

[0046] FIGS. 6A and 6B are drawings for reference in the description of the organic light-emitting panel of FIG. 5.

[0047] FIG. 7 is an example of an internal block diagram of a video display device according to an embodiment of the present disclosure.

[0048] Fig. 8 is an example of a circuit diagram of the second converter of Fig. 7.

[0049] Fig. 9 is an example of a circuit diagram of the third converter of Fig. 7.

[0050] Fig. 10 is an example of a circuit diagram of the converter of Fig. 7.

[0051] FIG. 11 is an example of an internal block diagram of a video display device related to the present disclosure.

[0052] Figures 12a to 12e are drawings referred to in the description of Figure 11.

[0053] FIG. 13 is an example of an internal block diagram of a video display device according to one embodiment of the present disclosure.

[0054] Figures 14a to 16d are drawings referred to in the description of Figure 13.

[0055] FIG. 17 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0056] FIG. 18 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0057] Figures 19a to 19d are drawings referenced in the description of Figure 18.

[0058] FIG. 20 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0059] Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

[0060] 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.

[0061] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0062] Referring to the drawing, the image display device (100) may include a display (180).

[0063] The display resolution of the display (180) is increasing to 2K, 4K, 8K, 16K, etc., and the peak brightness that can be displayed on the display (180) is also increasing. Accordingly, the power consumption of the power supplied to the display (180) is increasing.

[0064] Meanwhile, the display (180) may be implemented as any one of various panels. For example, the display (180) may be any one of a liquid crystal display panel (LCD panel), an organic light-emitting panel (OLED panel), an inorganic light-emitting panel (LED panel), etc.

[0065] Liquid crystal display panels may require a separate backlight in addition to the panel for displaying images.

[0066] Meanwhile, organic light-emitting panels or inorganic light-emitting panels do not require a separate backlight for image display.

[0067] The video display device (100) according to the embodiment of the present disclosure proposes a method for reducing power consumption in standby mode. In particular, the present disclosure proposes a method for reducing power consumption in each of multiple standby modes.

[0068] To this end, an image display device (100) according to one embodiment of the present disclosure includes a display (180), a signal processing device (170 of FIG. 2) that outputs an image signal to the display (180), a relay element (RL of FIG. 13) that switches an input AC voltage (Va), a converter (925 of FIG. 13) that is connected in parallel to one end (n2) of the relay element (RL), a microcomputer (173 of FIG. 13) that operates based on a DC voltage from the converter (925), and a switch (ST of FIG. 13) that is disposed between the converter (925) and the signal processing device (170) and operates based on a control signal output from the microcomputer (173).

[0069] Meanwhile, the image display device (100) according to one embodiment of the present disclosure supplies a first level voltage (Vzw) to the microcomputer (173) based on the off state of the relay element (RL), the off state of the switch (ST), and the operation of the converter (925) in the first standby mode.

[0070] Meanwhile, the image display device (100) according to one embodiment of the present disclosure supplies a second level voltage (Vst) higher than the first level to the signal processing device (170) based on the off state of the relay element (RL), the operation of the switch (ST), and the operation of the converter (925) in the second standby mode. Accordingly, power consumption in the standby mode can be reduced. In particular, power consumption can be reduced in each of the multiple standby modes.

[0071] Meanwhile, the video display device (100) of Fig. 1 can be a TV, monitor, tablet PC, mobile terminal, etc.

[0072] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0073] Referring to FIG. 2, an image display device (100) according to an embodiment of the present disclosure may include an image receiving unit (105), an external device interface unit (130), a storage unit (140), a user input interface unit (150), a sensor unit (not shown), a signal processing unit (170), a display (180), and an audio output unit (185).

[0074] The video receiving unit (105) may include a tuner unit (110), a demodulation unit (120), a network interface unit (130), and an external device interface unit (130).

[0075] Meanwhile, unlike the drawing, the video receiving unit (105) may include only a tuner unit (110), a demodulator unit (120), and an external device interface unit (130). That is, it may not include a network interface unit (130).

[0076] The tuner unit (110) selects an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna (not shown). In addition, it converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0077] For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF), and if it is an analog broadcast signal, it is converted into an analog baseband video or audio signal (CVBS / SIF). 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 signal processing device (170).

[0078] 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.

[0079] The demodulation unit (120) receives the digital IF signal (DIF) converted from the tuner unit (110) and performs a demodulation operation.

[0080] The demodulator (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.

[0081] The stream signal output from the demodulator (120) can be input to the signal processing device (170). The signal processing device (170) performs demultiplexing, image / audio signal processing, etc., and then outputs an image to the display (180) and outputs an audio to the audio output device (185).

[0082] The external device interface unit (130) can transmit or receive data to or from a connected external device (not shown), for example, a set-top box (50). To this end, the external device interface unit (130) may include an A / V input / output unit (not shown).

[0083] 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.

[0084] The A / V input / output unit can receive video and audio signals from an external device. Meanwhile, the wireless communication unit (not shown) can perform short-range wireless communication with other electronic devices.

[0085] Through this wireless communication unit (not shown), the external device interface unit (130) can exchange data with an adjacent mobile terminal (600). In particular, the external device interface unit (130) can receive device information, running application information, application images, etc. from the mobile terminal (600) in mirroring mode.

[0086] The network interface unit (135) provides an interface for connecting the video display device (100) to a wired / wireless network, including the Internet. For example, the network interface unit (135) can receive content or data provided by the Internet, a content provider, or a network operator via a network.

[0087] Meanwhile, the network interface unit (135) may include a wireless communication unit (not shown).

[0088] The storage unit (140) may store programs for each signal processing and control within the signal processing device (170), and may also store signal-processed image, voice, or data signals.

[0089] In addition, the storage unit (140) may also perform a function for temporary storage of video, audio, or data signals input to the external device interface unit (130). In addition, the storage unit (140) may store information regarding a specific broadcast channel through a channel memory function such as a channel map.

[0090] Although the storage unit (140) of FIG. 2 illustrates an embodiment in which the storage unit (140) is provided separately from the signal processing device (170), the scope of the present disclosure is not limited thereto. The storage unit (140) may be included within the signal processing device (170).

[0091] The user input interface unit (150) transmits a signal input by the user to the signal processing device (170) or transmits a signal from the signal processing device (170) to the user.

[0092] 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 value, etc. may be transmitted to a signal processing device (170), a user input signal input from a sensor unit (not shown) that senses a user's gesture may be transmitted to the signal processing device (170), or a signal from the signal processing device (170) may be transmitted to a sensor unit (not shown).

[0093] The signal processing device (170) can demultiplex an input stream or process demultiplexed signals through a tuner unit (110), a demodulator unit (120), a network interface unit (135), or an external device interface unit (130) to generate and output a signal for video or audio output.

[0094] For example, the signal processing device (170) can receive a broadcast signal or an HDMI signal received from the image receiving unit (105), perform signal processing based on the received broadcast signal or HDMI signal, and output a signal-processed image signal.

[0095] An image signal processed by a signal processing device (170) may be input to a display (180) and displayed as an image corresponding to the image signal. In addition, an image signal processed by a signal processing device (170) may be input to an external output device through an external device interface unit (130).

[0096] The voice signal processed in the signal processing device (170) can be output as sound to the audio output unit (185). In addition, the voice signal processed in the signal processing device (170) can be input to an external output device through the external device interface unit (130).

[0097] Although not illustrated in FIG. 2, the signal processing device (170) may include a demultiplexing unit, an image processing unit, etc. That is, the signal processing device (170) may perform various signal processing operations and, accordingly, may be implemented in the form of a system on chip (SOC). This will be described later with reference to FIG. 3.

[0098] In addition, the signal processing device (170) can control the overall operation within the video display device (100). For example, the signal processing device (170) can control the tuner unit (110) to select (tune) an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

[0099] In addition, the signal processing device (170) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0100] Meanwhile, the signal processing device (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.

[0101] Meanwhile, the signal processing device (170) can cause a predetermined 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.

[0102] Meanwhile, the signal processing device (170) can recognize the user's location based on an image captured from a camera (not shown). For example, the distance (z-axis coordinate) between the user and the image display device (100) can be determined. In addition, the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location can be determined.

[0103] The display (180) generates a driving signal by converting a video signal, data signal, OSD signal, control signal, etc. processed by the signal processing device (170) or a video signal, data signal, control signal, etc. received from the external device interface unit (130).

[0104] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0105] The audio output unit (185) receives a signal processed by the signal processing device (170) and outputs it as voice.

[0106] A camera unit (not shown) photographs a user. The camera unit (not shown) may be implemented with a single camera, but is not limited thereto, and may also be implemented with multiple cameras. Image information captured by the camera unit (not shown) may be input to a signal processing device (170).

[0107] The signal processing device (170) can detect the user's gesture based on an image captured from a shooting unit (not shown) or a signal detected from a sensor unit (not shown), or a combination thereof.

[0108] The power supply unit (190) supplies power to the entire image display device (100). In particular, the power supply unit (190) can supply power to a signal processing device (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.

[0109] Specifically, the power supply unit (190) may be equipped with a converter that converts AC voltage into DC voltage and a dc / dc converter that converts the level of the DC voltage.

[0110] The remote control device (200) transmits user input to the user input interface unit (150). To this end, the remote control device (200) may use Bluetooth, RF (Radio Frequency) communication, IR (Infrared) communication, UWB (Ultra Wideband), ZigBee, etc. In addition, the remote control device (200) may receive video, audio, or data signals output from the user input interface unit (150) and display or output the same as audio on the remote control device (200).

[0111] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0112] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the image display device (100) actually implemented. That is, two or more components may be combined into one component, or one component may be subdivided into two or more components, as needed. In addition, the functions performed by each block are intended to explain the embodiment of the present disclosure, and the specific operations or devices thereof do not limit the scope of the present disclosure.

[0113] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0114] Referring to the drawings, a signal processing device (170) according to an embodiment of the present disclosure may include a demultiplexing unit (310), an image processing unit (320), a processor (330), and an audio processing unit (370). In addition, a data processing unit (not shown) may be further included.

[0115] The demultiplexer (310) demultiplexes the 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).

[0116] The image processing unit (320) can perform signal processing on an input image. For example, the image processing unit (320) can perform image processing on an image signal demultiplexed from the demultiplexing unit (310).

[0117] To this end, the image processing unit (320) may include an image decoder (325), a scaler (335), an image quality processing unit (635), an image encoder (not shown), an OSD processing unit (340), a frame rate conversion unit (350), and a formatter (360).

[0118] The video decoder (325) decodes the demultiplexed video signal, and the scaler (335) scales the resolution of the decoded video signal so that it can be output on the display (180).

[0119] The video decoder (325) can be equipped with decoders of various standards. For example, it can be equipped with an MPEG-2, H.264 decoder, a 3D video decoder for color images and depth images, a decoder for multi-view images, etc.

[0120] The scaler (335) can scale an input video signal that has been decoded by a video decoder (325), etc.

[0121] For example, the scaler (335) can upscale when the size or resolution of the input image signal is small, and downscale when the size or resolution of the input image signal is large.

[0122] The image quality processing unit (635) can perform image quality processing on an input image signal for which image decoding has been completed in the image decoder (325), etc.

[0123] For example, the image quality processing unit (635) may perform noise removal processing of an input image signal, expand the resolution of the gradation of an input image signal, perform image resolution enhancement, perform signal processing based on high dynamic range (HDR), vary the frame rate, or perform image quality processing corresponding to panel characteristics, particularly organic light-emitting panels.

[0124] The OSD processing unit (340) generates an OSD signal based on user input or on its own. For example, based on a user input signal, a signal for displaying various information in the form of graphics or text on the screen of the display (180) may be generated. The generated OSD signal may include various data such as the user interface screen of the image display device (100), various menu screens, widgets, and icons. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0125] In addition, the OSD processing unit (340) can generate a pointer that can be displayed on the display based on a pointing signal input from the remote control device (200). In particular, such a pointer can be generated by the pointing signal processing unit, and the OSD processing unit (240) can include such a pointing signal processing unit (not shown). Of course, the pointing signal processing unit (not shown) can also be provided separately rather than being included within the OSD processing unit (240).

[0126] 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.

[0127] Meanwhile, the formatter (360) can change the format of an input video signal into a video signal for display on a display and output it.

[0128] In particular, the formatter (360) can change the format of the video signal to correspond to the display panel.

[0129] Meanwhile, the formatter (360) can also change the format of the video signal. For example, the format of the 3D video signal can be changed 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.

[0130] The processor (330) can control the overall operation within the image display device (100) or the signal processing device (170).

[0131] For example, the processor (330) can control the tuner (110) to select (tune) an RF broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0132] 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).

[0133] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0134] Additionally, the processor (330) can control the operation of the demultiplexing unit (310), the image processing unit (320), etc., within the signal processing device (170).

[0135] Meanwhile, the audio processing unit (370) within the signal processing device (170) can perform audio processing of the demultiplexed audio signal. For this purpose, the audio processing unit (370) can be equipped with various decoders.

[0136] Additionally, the audio processing unit (370) within the signal processing device (170) can process bass, treble, volume control, etc.

[0137] A data processing unit (not shown) within a signal processing device (170) can perform data processing on 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 information (EPG) information that includes broadcast information such as the start time and end time of a broadcast program broadcast on each channel.

[0138] Meanwhile, the block diagram of the signal processing device (170) illustrated in FIG. 3 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the signal processing device (170) actually implemented.

[0139] In particular, the frame rate conversion unit (350) and formatter (360) may be provided separately from the image processing unit (320).

[0140] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0141] As shown in (a) of FIG. 4a, a pointer (205) corresponding to a remote control device (200) is displayed on the display (180).

[0142] The user can move or rotate the remote control device (200) up and down, left and right ((b) of FIG. 4a), and forward and backward ((c) of FIG. 4a). The pointer (205) displayed on the display (180) of the video display device corresponds to the movement of the remote control device (200). As shown in the drawing, the pointer (205) moves and is displayed according to the movement in 3D space, so the remote control device (200) can be called a space remote control or a 3D pointing device.

[0143] Figure 4a (b) illustrates that when a user moves the remote control device (200) to the left, the pointer (205) displayed on the display (180) of the video display device also moves to the left in response.

[0144] Information about the movement of the remote control device (200) detected by the sensor of the remote control device (200) is transmitted to the image display device. The image display device can calculate the coordinates of the pointer (205) from the information about the movement of the remote control device (200). The image display device can display the pointer (205) to correspond to the calculated coordinates.

[0145] FIG. 4A (c) illustrates a case where, while pressing a specific button within the remote control device (200), the user moves the remote control device (200) away from the display (180). As a result, the selection area within the display (180) corresponding to the pointer (205) may be zoomed in and displayed in an enlarged manner. Conversely, when the user moves the remote control device (200) closer to the display (180), the selection area within the display (180) corresponding to the pointer (205) may be zoomed out and displayed in a reduced manner. Meanwhile, when the remote control device (200) moves away from the display (180), the selection area may be zoomed out, and when the remote control device (200) moves closer to the display (180), the selection area may be zoomed in.

[0146] Meanwhile, when a specific button within the remote control device (200) is pressed, recognition of up, down, left, and right movements may be excluded. That is, when the remote control device (200) moves away from or toward the display (180), up, down, left, and right movements may not be recognized, and only forward and backward movements may be recognized. When a specific button within the remote control device (200) is not pressed, only the pointer (205) moves in accordance with the up, down, left, and right movements of the remote control device (200).

[0147] Meanwhile, the movement speed or movement direction of the pointer (205) can correspond to the movement speed or movement direction of the remote control device (200).

[0148] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0149] Referring to the drawing, the remote control device (200) may include a wireless communication unit (425), a user input unit (435), a sensor unit (440), an output unit (450), a power supply unit (460), a storage unit (470), and a control unit (480).

[0150] The wireless communication unit (425) transmits and receives signals with any one of the image display devices according to the embodiments of the present disclosure described above. Among the image display devices according to the embodiments of the present disclosure, one image display device (100) will be described as an example.

[0151] In this embodiment, the remote control device (200) may be equipped with an RF module (421) capable of transmitting and receiving signals with the image display device (100) in accordance with RF communication standards. In addition, the remote control device (200) may be equipped with an IR module (423) capable of transmitting and receiving signals with the image display device (100) in accordance with IR communication standards.

[0152] In this embodiment, the remote control device (200) transmits a signal containing information about the movement of the remote control device (200) to the image display device (100) through the RF module (421).

[0153] In addition, the remote control device (200) can receive a signal transmitted by the image display device (100) through the RF module (421). In addition, the remote control device (200) can transmit commands for power on / off, channel change, volume change, etc. to the image display device (100) through the IR module (423) as needed.

[0154] The user input unit (435) may be configured as a keypad, a button, a touch pad, or a touch screen. The user can input a command related to the image display device (100) to the remote control device (200) by operating the user input unit (435). If the user input unit (435) has a hard key button, the user can input a command related to the image display device (100) to the remote control device (200) by pushing the hard key button. If the user input unit (435) has a touch screen, the user can input a command related to the image display device (100) to the remote control device (200) by touching a soft key of the touch screen. In addition, the user input unit (435) may be equipped with various types of input means that the user can operate, such as a scroll key or a jog key, and the present embodiment does not limit the scope of the present disclosure.

[0155] The sensor unit (440) may be equipped with a gyro sensor (441) or an acceleration sensor (443). The gyro sensor (441) may sense information regarding the movement of the remote control device (200).

[0156] For example, a gyro sensor (441) can sense information about the operation of a remote control device (200) based on the x, y, and z axes. An acceleration sensor (443) can sense information about the movement speed of the remote control device (200). Meanwhile, a distance measuring sensor can be further provided, thereby sensing the distance to the display (180).

[0157] The output unit (450) can output a video or audio signal corresponding to the operation of the user input unit (435) or to a signal transmitted from the video display device (100). Through the output unit (450), the user can recognize whether the user input unit (435) is being operated or whether the video display device (100) is being controlled.

[0158] For example, the output unit (450) may be equipped with an LED module (451) that lights up when the user input unit (435) is operated or a signal is transmitted and received with the image display device (100) through the wireless communication unit (425), a vibration module (453) that generates vibration, an audio output module (455) that outputs audio, or a display module (457) that outputs audio.

[0159] The power supply unit (460) supplies power to the remote control device (200). The power supply unit (460) can reduce power waste by stopping the power supply when the remote control device (200) is not moved for a predetermined period of time. The power supply unit (460) can resume the power supply when a predetermined key provided on the remote control device (200) is operated.

[0160] The storage unit (470) can store various types of programs, application data, etc. required for the control or operation of the remote control device (200). If the remote control device (200) wirelessly transmits and receives signals through the image display device (100) and the RF module (421), the remote control device (200) and the image display device (100) transmit and receive signals through a predetermined frequency band. The control unit (480) of the remote control device (200) can store and refer to information regarding the frequency band through which signals can be wirelessly transmitted and received between the remote control device (200) and the paired image display device (100), etc., in the storage unit (470).

[0161] The control unit (480) controls all matters related to the control of the remote control device (200). The control unit (480) can transmit a signal corresponding to a predetermined key operation of the user input unit (435) or a signal corresponding to the movement of the remote control device (200) sensed by the sensor unit (440) to the image display device (100) via the wireless communication unit (425).

[0162] The user input interface unit (150) of the video display device (100) may be equipped with a wireless communication unit (151) capable of wirelessly transmitting and receiving signals with a remote control device (200), and a coordinate value calculation unit (415) capable of calculating the coordinate value of a pointer corresponding to the operation of the remote control device (200).

[0163] The user input interface unit (150) can wirelessly transmit and receive signals to and from the remote control device (200) via the RF module (412). In addition, the user input interface unit (150) can receive signals transmitted by the remote control device (200) according to the IR communication standard via the IR module (413).

[0164] The coordinate value calculation unit (415) can calculate the coordinate values ​​(x, y) of the pointer (205) to be displayed on the display (170) by correcting hand shake or error from a signal corresponding to the operation of the remote control device (200) received through the wireless communication unit (151).

[0165] A transmission signal of a remote control device (200) input to a video display device (100) through a user input interface unit (150) is transmitted to a signal processing device (170) of the video display device (100). The signal processing device (170) can determine information about the operation and key operation of the remote control device (200) from the signal transmitted from the remote control device (200) and control the video display device (100) in response thereto.

[0166] As another example, the remote control device (200) can calculate pointer coordinate values ​​corresponding to the operation and output them to the user input interface unit (150) of the image display device (100). In this case, the user input interface unit (150) of the image display device (100) can transmit information about the received pointer coordinate values ​​to the signal processing device (170) without a separate hand shake or error correction process.

[0167] In addition, as another example, the coordinate value calculation unit (415) may be provided inside the signal processing device (170) rather than the user input interface unit (150), unlike in the drawing.

[0168] Figure 5 is an example of an internal block diagram of the display of Figure 2.

[0169] Referring to the drawing, the display (180b) based on an organic light-emitting panel may include an organic light-emitting panel (210b), a first interface unit (230b), a second interface unit (231b), a timing controller (232b), a gate driver unit (234b), a data driver unit (236b), a memory (240b), a processor (270b), a power supply unit (290b), a current detector unit (510b), etc.

[0170] The display (180b) receives a video signal (Vdb), a first DC voltage (V1b), and a second DC voltage (V2b), and can display a predetermined image based on the video signal (Vdb).

[0171] Meanwhile, the first interface unit (230b) within the display (180b) can receive a video signal (Vdb) and a first DC voltage (V1b) from the signal processing device (170b).

[0172] Here, the first DC voltage (V1b) can be used for the operation of the power supply (290b) and the timing controller (232b) within the display (180b).

[0173] Next, the second interface unit (231b) can receive a second DC voltage (V2b) from an external power supply unit (190b). Meanwhile, the second DC voltage (V2b) can be input to a data driving unit (236b) within the display (180b).

[0174] The timing controller (232b) can output a data driving signal (Sdab) and a gate driving signal (Sgab) based on a video signal (Vdb).

[0175] For example, when the first interface unit (230b) converts an input image signal (Vdb) and outputs a converted image signal (va1b), the timing controller (232b) can output a data driving signal (Sdab) and a gate driving signal (Sgab) based on the converted image signal (va1b).

[0176] The timing controller (timing controllerb) (232b) can receive, in addition to the video signal (Vdb) from the signal processing device (170b), a control signal, a vertical synchronization signal (Vsyncb), etc.

[0177] In addition, the timing controller (timing controllerb) (232b) can output a gate driving signal (Sgab) for the operation of the gate driving unit (234b) and a data driving signal (Sdab) for the operation of the data driving unit (236b) based on a control signal, a vertical synchronization signal (Vsyncb), etc., in addition to a video signal (Vdb).

[0178] The data driving signal (Sdab) at this time may be a data driving signal for driving RGBW subpixels when the panel (210b) has RGBW subpixels.

[0179] Meanwhile, the timing controller (232b) can further output a control signal (Csb) to the gate driver (234b).

[0180] The gate driving unit (234b) and the data driving unit (236b) supply a scan signal and an image signal to the organic light-emitting panel (210b) through the gate line (GLb) and the data line (DLb), respectively, in accordance with the gate driving signal (Sgab) and the data driving signal (Sdab) from the timing controller (232b). Accordingly, the organic light-emitting panel (210b) displays a predetermined image.

[0181] Meanwhile, the organic light-emitting panel (210b) may include an organic light-emitting layer, and in order to display an image, a plurality of gate lines (GLb) and data lines (DLb) may be arranged in a matrix form to cross each pixel corresponding to the organic light-emitting layer.

[0182] Meanwhile, the data driving unit (236b) can output a data signal to the organic light-emitting panel (210b) based on the second DC voltage (V2b) from the second interface unit (231b).

[0183] The power supply unit (290b) can supply various power sources to the gate driver unit (234b), the data driver unit (236b), the timing controller (232b), etc.

[0184] The current detection unit (510b) can detect the current flowing in the subpixel of the organic light-emitting panel (210b). The detected current can be input to a processor (270b) or the like for cumulative current calculation.

[0185] The processor (270b) can perform various controls within the display (180b). For example, it can control the gate driver (234b), the data driver (236b), the timing controller (232b), etc.

[0186] Meanwhile, the processor (270b) can receive information on current flowing in the subpixel of the organic light-emitting panel (210b) from the current detection unit (510b).

[0187] FIGS. 6A and 6B are drawings for reference in the description of the organic light-emitting panel of FIG. 5.

[0188] First, FIG. 6a is a drawing showing pixels within an organic light-emitting panel (210b).

[0189] Referring to the drawing, the organic light-emitting panel (210b) may have a plurality of scan lines (Scan 1 to Scan n) and a plurality of data lines (R1, G1, B1, W1 to Rm, Gm, Bm, Wm) intersecting therewith.

[0190] Meanwhile, a pixel (subpixel) is defined in the intersection area of ​​the scan line and the data line within the organic light-emitting panel (210b). In the drawing, a pixel having RGBW subpixels (SR1, SG1, SB1, SW1) is illustrated.

[0191] FIG. 6b illustrates the circuit of one sub-pixel within the pixel of the organic light-emitting panel of FIG. 6a.

[0192] Referring to the drawing, the organic light-emitting sub-pixel circuit (CRTm) may be an active type and include a scan switching element (SW1), a storage capacitor (Cst), a driving switching element (SW2), and an organic light-emitting layer (OLED).

[0193] The scan switching element (SW1) is turned on according to an input scan signal (Vdscan) by connecting a scan line to the gate terminal. When turned on, the input data signal (Vdata) is transmitted to the gate terminal of the driving switching element (SW2) or one end of the storage capacitor (Cst).

[0194] The storage capacitor (Cst) is formed between the gate terminal and the source terminal of the driving switching element (SW2), and stores a predetermined difference between the data signal level transmitted to one end of the storage capacitor (Cst) and the DC voltage (Vdd) level transmitted to the other end of the storage capacitor (Cst).

[0195] For example, if the data signal has different levels according to the PAM (Plus Amplitude Modulation) method, the power level stored in the storage capacitor (Cst) changes depending on the level difference of the data signal (Vdata).

[0196] As another example, when the data signal has different pulse widths according to the Pulse Width Modulation (PWM) method, the power level stored in the storage capacitor (Cst) changes depending on the difference in the pulse width of the data signal (Vdata).

[0197] The driving switching element (SW2) is turned on according to the power level stored in the storage capacitor (Cst). When the driving switching element (SW2) is turned on, a driving current (IOLED) proportional to the stored power level flows to the organic light-emitting layer (OLED). Accordingly, the organic light-emitting layer (OLED) performs a light-emitting operation.

[0198] The organic light-emitting layer (OLED) includes an RGBW emission layer (EML) corresponding to a subpixel, and may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), and may also include a hole blocking layer.

[0199] Meanwhile, subpixels all emit white light from the organic light-emitting diode (OLED), but separate color filters are provided for green, red, and blue subpixels to implement the colors. That is, green, red, and blue subpixels each additionally have green, red, and blue color filters. On the other hand, white subpixels emit white light, so separate color filters are not required.

[0200] Meanwhile, in the drawing, a case in which a p-type MOSFET is used as the scan switching element (SW1) and the driving switching element (SW2) is exemplified, but an n-type MOSFET, or other switching elements such as a JFET, IGBT, or SIC may also be used.

[0201] Meanwhile, a pixel is a hold-type element that continues to emit light in an organic light-emitting layer (OLED) after a scan signal is applied during a unit display period, specifically, during a unit frame.

[0202] FIG. 7 is an example of an internal block diagram of a video display device according to an embodiment of the present disclosure.

[0203] Referring to the drawings, an image display device (100) according to an embodiment of the present disclosure includes a display (180), a signal processing device (170) that outputs an image signal to the display (180), and a power supply unit (190) that supplies a display driving voltage to the display (180).

[0204] A power supply unit (190) according to one embodiment of the present disclosure may include a relay element (RL) that switches an input AC voltage (Va), a converter (925) connected in parallel to one end (n2) which is an input terminal of the relay element (RL), a second converter (905) that is connected to the other end (n4) which is an output terminal of the relay element (RL) and converts the input AC voltage (Va) from the relay element (RL) into a DC voltage, and a third converter (910) that converts the level of the DC voltage from the second converter (905).

[0205] The converter (925) and the second converter (905) may each be an ac / dc converter that converts an input alternating current voltage (Va) into a direct current voltage.

[0206] The third converter (910) can convert the level of the DC voltage from the second converter (905) to output the display driving voltage (Vdd) to the display (180) or output the operating voltage (Vop) or standby voltage (Vst) to the signal processing device (170).

[0207] For this purpose, the third converter (910) may be equipped with a multi-level LLC converter.

[0208] For example, the third converter (910) may include a first LLC converter (912) that outputs a display driving voltage (Vdd) of approximately 24 V, and a second LLC converter (915) that outputs an operating voltage (Vop) of approximately 12 V or a standby voltage (Vst) of approximately 8 V to the signal processing device (170).

[0209] At this time, the first LLC converter (912) and the second LLC converter (915) can be connected in parallel.

[0210] In the drawing, it is exemplified that a first LLC converter (912) is placed between the n3 node and the n1 node, and a second LLC converter (915) is placed between the n3 node and the n5 node.

[0211] Also, the drawing illustrates that a converter (925) is placed between the n2 node and the n6 node, and a second converter (905) is placed between the n4 node and the n3 node.

[0212] Meanwhile, n1, the output node of the second converter (905), can be electrically connected to the display (180).

[0213] The second converter (905) can convert the input AC voltage (Va) into a DC voltage and output it by having a diode or switching element.

[0214] The third converter (910) can convert the level of the input DC voltage and output the display driving voltage (Vdd).

[0215] For example, the third converter (910) can step up the DC voltage and output the display driving voltage (Vdd).

[0216] Meanwhile, if the display (180) is an organic light-emitting panel, the display driving voltage (Vdd) may be a pixel driving voltage of an organic light-emitting pixel.

[0217] Meanwhile, if the display (180) is an inorganic light-emitting panel, the display driving voltage (Vdd) may be the pixel driving voltage of the inorganic light-emitting pixel.

[0218] Meanwhile, if the display (180) is a liquid crystal panel, the display driving voltage (Vdd) may be a backlight driving voltage or a liquid crystal pixel driving voltage.

[0219] Meanwhile, the image display device (100) according to one embodiment of the present disclosure further includes a main board (900) including a signal processing device (170) and a microcomputer (173).

[0220] Meanwhile, the main board (900) or signal processing device (170) can output a switch drive control signal (SSwd) to the converter (925). Accordingly, the converter (925) can be driven stably.

[0221] Meanwhile, the main board (900) or signal processing device (170) can output a switch drive control signal (SSwa) to the second converter (905). Accordingly, the second converter (905) can be driven stably.

[0222] Meanwhile, the main board (900) or signal processing device (170) can output a switch driving control signal (SSwb) to the first LLC converter (913) within the third converter (910). Accordingly, the first LLC converter (913) within the third converter (910) can be stably driven.

[0223] Meanwhile, the main board (900) or signal processing device (170) can output a switch drive control signal (SSwc) to the second LLC converter (915) within the third converter (910). Accordingly, the second LLC converter (915) within the third converter (910) can be stably driven.

[0224] Meanwhile, the power supply unit (190) may further include a signal transmission unit (FDK) connected between the third converter (910) and the main board (900).

[0225] The signal transmission unit (FDK) can receive a display on signal (Spo) or a display off signal (Spf) from a main board (900) including a signal processing device (170) or a signal processing device (170), and transmit the display on signal (Spo) or the display off signal (Spf) to a third converter (910).

[0226] Fig. 8 is an example of a circuit diagram of the second converter of Fig. 7.

[0227] Referring to the drawing, the second converter (905) of FIG. 7 has a plurality of switching elements (Sa, Sb) and a plurality of diode elements (Da, Db) to efficiently supply high power, and can convert the level of an input AC voltage (Vac) based on the switching operation of the switching elements (Sa, Sb) to output a DC voltage (Vdc).

[0228] Specifically, the second converter (905) may include a first leg (lega) having a first diode element (Da) and a first switching element (Sa) that are connected in series with each other, and a second leg (legb) that is connected in parallel to the first leg (lega) and has a second diode element (Db) and a second switching element (Sb) that are connected in series with each other.

[0229] One end (cathode) of the first diode element (Da) is connected to one end (na) of the output terminal (na-nb) of the second converter (905), and the other end (anode) of the first diode element (Da) can be connected to the first node (nc).

[0230] One end of the first switching element (Sa) is connected to the first node (nc), and the other end of the first switching element (Sa) can be connected to the other end (nb) of the output terminal (na-nb) of the second converter (905).

[0231] One end (cathode) of the second diode element (Db) is connected to one end (na) of the output terminal (na-nb) of the second converter (905), and the other end (anode) of the second diode element (Db) can be connected to the second node (nd).

[0232] One end of the second switching element (Sb) is connected to the second node (nd), and the other end of the second switching element (Sb) can be connected to the other end (nb) of the output terminal (na-nb) of the second converter (905).

[0233] Meanwhile, the second converter (905) of Fig. 8 can be named a half-bridge type AC / DC converter.

[0234] Meanwhile, the second converter (905) may further include an inductor (L) disposed between the first node (na) between the first diode element (Da) and the first switching element (Sa) and an input terminal to which an input AC voltage (Vac) is input.

[0235] Meanwhile, a third converter (910) connected to both ends of a dc capacitor (Ca) can be connected to the output terminal (nc-nd) of the second converter (905).

[0236] Fig. 9 is an example of a circuit diagram of the third converter of Fig. 7.

[0237] Referring to the drawing, the third converter (910) may be a multi-level LLC converter.

[0238] The third converter (910) of FIG. 9 may be the first LLC converter (912) or the second LLC converter (915) of FIG. 7.

[0239] The third converter (910) may include a transformer (805), a first switching element (SW1) and a second switching element (SW2) that are arranged at the input terminal of the transformer (805) and connected in series with each other, and a resonant capacitor (Cr) and a resonant inductor (Lr) that are respectively connected between the input terminal of the transformer (805) and the second switching element (SW2). Accordingly, it is possible to output a display driving voltage (Vdd) or an operating voltage (Vop) or a standby voltage (Vst) of a signal processing device (170) based on resonance.

[0240] Meanwhile, the third converter (910) may further include full bridge diode elements (D1 to D4) arranged at the output terminal of the transformer (805) and capacitor elements (Cd) arranged at both ends (nda-ndb) of the output terminal of the full bridge diode elements (D1 to D4). Accordingly, the display driving voltage (Vdd) can be stably output based on resonance.

[0241] Meanwhile, it is preferable that no resistor elements are placed at both ends (nda-ndb) of the capacitor element (Cd).

[0242] Since no resistor elements are placed at both ends (nda-ndb) of the capacitor element (Cd), unnecessary power consumption due to the resistor elements can be reduced. Accordingly, the power consumption of the power supply unit (190) can be reduced.

[0243] Meanwhile, the third converter (910) may further include a voltage detection circuit (935) that detects the voltage across both ends of the second switching element (SW2).

[0244] Meanwhile, the third converter (910) can turn on the second switching element (SW2) when the voltage across both terminals (nm-nb) of the second switching element (SW2) detected by the voltage detection circuit (935) is zero voltage. Accordingly, zero voltage switching of the second switching element (SW2) can be performed, thereby reducing noise.

[0245] Meanwhile, the voltage detection circuit (935) may include a capacitor (Ct) connected to a node (nm) between the first switching element (SW1) and the second switching element (SW2), a Zener diode (Dt) disposed between the capacitor (Ct) and a ground terminal, and a resistance element (Rt) having one end connected to a node (nb) between the capacitor (Ct) and the Zener diode (Dt). Accordingly, the voltage across both ends of the second switching element (SW2) can be stably detected.

[0246] Meanwhile, the third converter (910) may further include a switching control unit (925) that controls the first switching element (SW1) and the second switching element (SW2).

[0247] Meanwhile, the switching control unit (925) can control the zero-voltage switching of the second switching element (SW2) based on the voltage of the nb node. Accordingly, by performing zero-voltage switching of the second switching element (SW2), noise can be reduced.

[0248] Fig. 10 is an example of a circuit diagram of the converter of Fig. 7.

[0249] Referring to the drawing, the converter (925) may include a flyback converter.

[0250] That is, the converter (925) may include a transformer (Ts), a switching element (sm) connected to a node (nt) on the input side of the transformer (Ts), and a diode element (Dm) connected to a node (n6) on the output side of the transformer (Ts).

[0251] Accordingly, the input AC voltage (Va) from the n2 node can be converted into a DC voltage based on the switching of the switching element (sm) and output through both ends of the n6-n7 node.

[0252] FIG. 11 is an example of an internal block diagram of a video display device related to the present disclosure.

[0253] Referring to the drawings, an image display device (100x) related to the present disclosure includes a signal processing device (170) that outputs an image signal to a display (180), a relay element (RL) that switches an input AC voltage (Va), a converter (925) that is connected to an input terminal of the relay element (RL) and converts the input AC voltage (Va) into a DC voltage, a microcomputer (173) that operates based on the DC voltage from the converter (925), a second converter (905) that is connected to an output terminal of the relay element (RL) and converts the input AC voltage (Va) into a DC voltage, and a third converter (910) that converts the level of the DC voltage from the second converter (905).

[0254] Figures 12a to 12e are drawings referred to in the description of Figure 11.

[0255] FIG. 12a is a drawing explaining the operation of the image display device (100x) related to the present disclosure in the first standby mode, which is a low-power standby mode.

[0256] Referring to the drawing, in the first standby mode, when the relay element (RL) is turned off and the converter (925) is operating, a first level voltage (Vzw) of approximately 3.3 V can be supplied to the microcomputer (173) based on the current path of PTHax.

[0257] Meanwhile, if the converter (925) is a flyback converter, the input side and the output side of the transformer (Ts) are insulated, so the power consumed by the converter (925) is almost zero.

[0258] Therefore, the first standby mode can be named zero watt standby mode.

[0259] FIG. 12b is a drawing explaining the operation of the image display device (100x) related to the present disclosure in the second standby mode, which is the normal standby mode.

[0260] Referring to the drawing, in the second standby mode, when the relay element (RL) is turned on and the second converter (905) and the third converter (910) are operating, a second level voltage (Voax) of approximately 8 V can be supplied to the signal processing device (170) based on the current path of PTHbx.

[0261] For the second standby mode, the third converter (910) can output a second level voltage (Voax) of approximately 8 V as a standby mode voltage to the signal processing device (170).

[0262] Meanwhile, in the second standby mode, the current path of PTHbx passes through the relay element (RL), the second converter (905), and the third converter (910), so the power consumption becomes higher than that in the first standby mode.

[0263] In particular, there is a problem in which the power consumption during the conduction of the relay element (RL) exceeds the allowable standard during standby mode.

[0264] FIG. 12c is a drawing explaining the operation of the image display device (100x) related to the present disclosure in the operating mode.

[0265] Referring to the drawing, in the operating mode, when the relay element (RL) is turned on and the second converter (905) and the third converter (910) are operating, a third level voltage (Vobx) of approximately 12 V can be supplied to the signal processing device (170) based on the current path of PTHcx.

[0266] Meanwhile, for the operation mode, the third converter (910) can output a third level voltage (Vobx) of approximately 12 V to the signal processing device (170), unlike FIG. 12b.

[0267] Meanwhile, in the operating mode, the current path of PTHcx passes through the relay element (RL), the second converter (905), and the third converter (910), so the power consumption becomes higher than that in the first standby mode.

[0268] FIG. 12d is a drawing referenced in the description of the operation of the third converter (910) of FIG. 11.

[0269] Referring to the drawing, the third converter (910) does not operate in the first standby mode, outputs a second level voltage (Voax) of approximately 8 V from Txa to Txb, which is the second standby mode period, and can output a third level voltage (Vobx) of approximately 12 V after Txb, which is the operating mode period.

[0270] FIG. 12e is a drawing explaining the operation of the converter (920) and the third converter (910) in the first standby mode, the second standby mode, and the operating mode.

[0271] Referring to the drawing, in the first standby mode, the relay (RL) is off, the converter (920) is operating, the second converter (905) is off, and the third converter (910) is off.

[0272] Meanwhile, in the second standby mode and operating mode, the relay (RL) is turned on, the converter (920) operates, the second converter (905) operates, and the third converter (910) operates.

[0273] Meanwhile, in the second standby mode and the operating mode, the third converter (910) outputs voltages of different levels.

[0274] Referring to FIGS. 11 to 12e, the image display device (100x) related to the present disclosure has a problem in that power consumption in the first standby mode is below the allowable standard value in the standby mode, but power consumption in the second standby mode exceeds the allowable standard value in the standby mode.

[0275] Accordingly, the present disclosure proposes a method for ensuring that the standby mode is below the allowable standard in both the first standby mode and the second standby mode. This is described with reference to FIG. 13 and below.

[0276] FIG. 13 is an example of an internal block diagram of a video display device according to one embodiment of the present disclosure.

[0277] Referring to the drawings, an image display device (100) according to one embodiment of the present disclosure includes a display (180), a signal processing device (170) for outputting an image signal to the display (180), a relay element (RL) for switching an input AC voltage (Va), a converter (925) connected in parallel to one end (n2) of the relay element (RL), a microcomputer (173) for operating based on a DC voltage from the converter (925), and a switch (ST) disposed between the converter (925) and the signal processing device (170) and operating based on a control signal output from the microcomputer (173).

[0278] In the drawing, a converter (925) is placed between the input terminal of the relay element (RL) and the n6 node.

[0279] Meanwhile, the drawing illustrates that a switch (ST) is placed between the n6 node, which is an output terminal of the converter (925), and the ns node, which is one of the input terminals of the signal processing device (170).

[0280] Meanwhile, the image display device (100) according to one embodiment of the present disclosure supplies a voltage (Vzw) of a first level to the microcomputer (173) based on the off state of the relay element (RL), the off state of the switch (ST), and the operation of the converter (925) in the first standby mode, and supplies a voltage (Vst) of a second level higher than the first level to the signal processing device (170) based on the off state of the relay element (RL), the operation of the switch (ST), and the operation of the converter (925) in the second standby mode. Accordingly, power consumption in the standby mode can be reduced. In particular, power consumption can be reduced in each of the multiple standby modes.

[0281] Meanwhile, the microcomputer (173) can output a control signal (Sr) for relay (RL) operation based on the DC voltage from the converter (925).

[0282] Meanwhile, the image display device (100) according to one embodiment of the present disclosure may further include a second converter (905) connected to the other end (n4) of the relay element (RL) to convert an input AC voltage (Va) from the relay element (RL) into a DC voltage, and a third converter (910) to convert the level of the DC voltage from the second converter (905).

[0283] Meanwhile, the converter (925) can output a voltage (Vzw) of a first level in the first standby mode, and can output a voltage (Vst) of a second level higher than the first level in the second standby mode. Accordingly, power consumption can be reduced in the first standby mode and the second standby mode.

[0284] Figures 14a to 16d are drawings referred to in the description of Figure 13.

[0285] FIG. 14a is a drawing explaining the operation of the image display device (100) according to the embodiment of the present disclosure in the first standby mode, which is a low-power standby mode.

[0286] Referring to the drawing, in the first standby mode, when the relay element (RL) is turned off, the switch (ST) is turned off, and the converter (925) is operating, a first level voltage (Vzw) of approximately 3.3 V can be supplied to the microcomputer (173) based on the current path of PTHa.

[0287] That is, in the first standby mode, a first level voltage (Vzw) of approximately 3.3 V can be supplied to the microcomputer (173) according to the current path of PTHa through the converter (925).

[0288] For this purpose, the converter (925) can output a first level voltage (Vzw) of approximately 3.3 V in the first standby mode.

[0289] Meanwhile, if the converter (925) is a flyback converter, the input side and the output side of the transformer (Ts) are insulated, so the power consumed by the converter (925) is almost zero.

[0290] Therefore, the first standby mode can be named zero watt standby mode.

[0291] Meanwhile, in the first standby mode, the second level voltage (Vst) is not supplied to the signal processing device (170). Accordingly, power consumption in the first standby mode can be reduced.

[0292] Meanwhile, power consumption in the first standby mode may be less than power consumption in the second standby mode.

[0293] FIG. 14b is a drawing explaining the operation of the image display device (100) according to the embodiment of the present disclosure in the second standby mode, which is the normal standby mode.

[0294] Referring to the drawing, in the second standby mode, when the relay element (RL) is turned off, the switch (ST) is turned on, and the converter (925) is operating, a second level voltage (Vst) of approximately 8 V can be supplied to the signal processing device (170) based on the current path of PTHb.

[0295] That is, in the second standby mode, a second level voltage (Vst) of approximately 8 V can be supplied to the signal processing device (170) according to the current path of PTHb through the converter (925) and the switch (ST).

[0296] For this purpose, the converter (925) can output a second level voltage (Vst) of approximately 8 V in the second standby mode.

[0297] Meanwhile, unlike Fig. 12b, in the second standby mode, the relay element (RL) is turned off, so power consumption is significantly reduced.

[0298] In particular, since it passes through only the converter (925) and the switch (ST), the power consumption in the second standby mode is higher than that in the first standby mode, but it can be stably maintained below the allowable standard value in the standby mode.

[0299] FIG. 14c is a drawing explaining the operation of the image display device (100) according to the embodiment of the present disclosure in the operating mode.

[0300] Referring to the drawing, in the operating mode, when the relay element (RL) is turned on and the second converter (905) and the third converter (910) are operating, a third level voltage (Vop) of approximately 12 V can be supplied to the signal processing device (170) based on the current path of PTHc.

[0301] Meanwhile, the third converter (910) can supply a voltage (Vop) of a third level higher than the second level to the signal processing device (170) based on the on state of the relay element (RL), the operation of the second converter (905), and the operation of the third converter (910) in the operation mode after the first standby mode or the second standby mode. Accordingly, the operation voltage (Vop) can be stably supplied to the signal processing device (170) through the third converter (910).

[0302] Meanwhile, in the operating mode, the current path of PTHc passes through the relay element (RL), the second converter (905), and the third converter (910), so the power consumption becomes higher than in the first standby mode and the second standby mode.

[0303] Fig. 15a is a drawing referenced in the description of the operation of the converter (925) of Fig. 12.

[0304] Referring to the drawing, the converter (925) can output a first level voltage (Vzw) of approximately 3.3 V from Tm1 to Tm2, ​​which is the first standby mode period, and can output a second level voltage (Vst) of approximately 8 V after Tm2, ​​which is the second standby mode period.

[0305] FIG. 15b is a drawing explaining the operation of the third converter (910) in the operating mode.

[0306] Referring to the drawing, the third converter (910) does not operate during the first standby mode period and the second standby mode period.

[0307] Meanwhile, the third converter (910) can output a third level voltage (Vop) of approximately 12 V after the operating mode period Tm3 after the first standby mode or the second standby mode.

[0308] Figure 16a is a flowchart showing an operation method of an image display device in the first standby mode.

[0309] Referring to the drawing, in the first standby mode, the converter (925) in the image display device (100) is turned on (S1510), the relay element (RL) is turned off (S1520), and the switch (ST) is turned off (S1530).

[0310] In the first standby mode, the converter (925) can output a first level voltage (Vzw) of approximately 3.3 V, and accordingly, a first level voltage (Vzw) of approximately 3.3 V can be supplied to the microcomputer (173).

[0311] Figure 16b is a flowchart showing an operation method of an image display device in a second standby mode.

[0312] Referring to the drawing, in the second standby mode, the converter (925) in the image display device (100) is turned on (S1512), the relay element (RL) is turned off (S1522), and the switch (ST) is turned on (S1532).

[0313] In the second standby mode, the converter (925) can output a second level voltage (Vst) of approximately 8 V, and accordingly, a second level voltage (Vst) of approximately 8 V can be supplied to the signal processing device (170).

[0314] Figure 16c is a flowchart showing an operation method of an image display device when switching from a first standby mode to a second standby mode.

[0315] Referring to the drawing, in the first standby mode, the converter (925) in the image display device (100) is turned on (S1540), and in the first standby mode, the converter (925) outputs a first level voltage (Vzw) of approximately 3.3 V.

[0316] Meanwhile, as the device transitions to the second standby mode, the converter (925) in the video display device (100) outputs a second level voltage (Vst) of approximately 8 V (S1543) and enters the second standby mode (S1544).

[0317] Finally, when switching from the first standby mode to the second standby mode, the switch (ST) is turned on, so that a second level voltage (Vst) higher than the first level can be supplied to the signal processing device (170). Accordingly, power consumption in the standby mode can be reduced.

[0318] Figure 16d is a flowchart showing the operation method of the image display device when switching from the second standby mode to the first standby mode.

[0319] Referring to the drawing, in the second standby mode, the second standby mode is turned off to switch to the first standby mode (S1550).

[0320] Next, upon transition to the first standby mode, the converter (925) within the image display device (100) outputs a first level voltage (Vzw) of approximately 3.3 V (S1553) and enters the first standby mode.

[0321] Meanwhile, when switching from the second standby mode to the first standby mode, the switch (ST) is turned off, so that the first level voltage (Vzw) can be supplied to the signal processing device (170). Accordingly, power consumption in the standby mode can be reduced.

[0322] FIG. 17 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0323] Referring to the drawing, the image display device (100b) of FIG. 17 may further include a voltage step-down unit (177) that steps down the level of the DC voltage from the converter (925) to output a first level voltage (Vzw), compared to the image display device (100) of FIG. 14.

[0324] That is, the image display device (100b) of FIG. 17 can supply a voltage (Vzw) of a first level to the microcomputer (173) in the first standby mode based on the off of the relay element (RL), the off of the switch (ST), the operation of the converter (925), and the operation of the voltage step-down unit (177), and can supply a voltage (Vst) of a second level higher than the first level to the signal processing device (170) in the second standby mode based on the off of the relay element (RL), the operation of the switch (ST), and the operation of the converter (925). Accordingly, power consumption in the standby mode can be reduced.

[0325] That is, a video display device (100) according to another embodiment of the present disclosure includes a display (180), a signal processing device (170) that outputs a video signal to the display (180), a relay element (RL) that switches an input AC voltage (Va), a converter (925) that is connected in parallel to one end (n2) of the relay element (RL), a voltage step-down unit (177) that steps down the level of a DC voltage from the converter (925), a microcomputer (173) that operates based on the DC voltage from the converter (925), and a switch (ST) that is disposed between the converter (925) and the signal processing device (170) and operates based on a control signal output from the microcomputer (173).

[0326] Meanwhile, the image display device (100) according to another embodiment of the present disclosure supplies a first level voltage (Vzw) to the microcomputer (173) based on the off state of the relay element (RL), the off state of the switch (ST), the operation of the converter (925), and the operation of the voltage step-down unit (177) in the first standby mode.

[0327] Meanwhile, the image display device (100) according to another embodiment of the present disclosure supplies a second level voltage (Vst) higher than the first level to the signal processing device (170) based on the off state of the relay element (RL), the operation of the switch (ST), and the operation of the converter (925) in the second standby mode. Accordingly, power consumption in the standby mode can be reduced. In particular, power consumption can be reduced in each of the multiple standby modes.

[0328] Meanwhile, the converter (925) can output a fourth level voltage (Vow) higher than the first level of approximately 3.3 V in the first standby mode. The fourth level at this time can be approximately 4 V.

[0329] Meanwhile, the converter (925) can output a second level voltage (Vst) of approximately 8 V, which is higher than the fourth level, in the second standby mode. Accordingly, power consumption in the standby mode can be reduced.

[0330] Meanwhile, the converter (925) outputs a fourth level voltage (Vow) higher than the first level in the first standby mode, and the voltage step-down unit (177) can step down the fourth level voltage (Vow) to the first level of approximately 3.3 V in the first standby mode.

[0331] Meanwhile, the voltage step-down unit (177) can step down the second level voltage (Vst) of approximately 8 V to the first level of approximately 3.3 V in the second standby mode. Accordingly, power consumption in the standby mode can be reduced.

[0332] Meanwhile, a video display device (100) according to another embodiment of the present disclosure may further include a second converter (905) that is connected to the other end (n4) of a relay element (RL) and converts an input AC voltage (Va) from the relay element (RL) into a DC voltage, and a third converter (910) that converts the level of the DC voltage from the second converter (905). Accordingly, an operating voltage (Vop) can be stably supplied to a signal processing device (170) through the third converter (910).

[0333] Meanwhile, the third converter (910) can supply a voltage (Vop) of a third level higher than the second level to the signal processing device (170) based on the on state of the relay element (RL), the operation of the second converter (905), and the operation of the third converter (910) in the operation mode after the first standby mode or the second standby mode. Accordingly, the operation voltage (Vop) can be stably supplied to the signal processing device (170) through the third converter (910).

[0334] FIG. 18 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0335] Referring to the drawing, a video display device (100c) according to another embodiment of the present disclosure is similar to the video display device (100) of FIG. 14, but differs in that a latching relay (LAR) is arranged instead of a relay element (RL) and a switch (ST) is omitted.

[0336] According to another embodiment of the present disclosure, in a video display device (100c), in a first standby mode, based on the off of the latching relay (LAR) and the operation of the converter (925), a voltage (Vzw) of a first level can be supplied to the microcomputer (173), and in a second standby mode, based on the on of the latching relay (LAR), the operation of the second converter (905), and the operation of the third converter (910), a voltage (Vst) of a second level higher than the first level can be supplied to the signal processing device (170).

[0337] Meanwhile, since the power consumption of the latching relay (LAR) is lower than that of the relay element (RL) of Fig. 14, the power consumption in the first standby mode as well as the second standby mode can be maintained below the allowable standard in the standby mode.

[0338] Meanwhile, according to another embodiment of the present disclosure, the image display device (100c), in the first standby mode, the converter (925) can output a voltage (Vzw) of the first level, and in the second standby mode, the third converter (910) can output a voltage (Vst) of the second level.

[0339] Meanwhile, according to another embodiment of the present disclosure, according to a video display device (100c), in the operation mode, based on the on of the latching relay (LAR), the operation of the second converter (905), and the operation of the third converter (910), a third level voltage (Vop) output from the third converter (910) can be supplied to the signal processing device (170).

[0340] FIG. 19a is a flowchart showing the operation method of the image display device (100c) of FIG. 18 in the first standby mode.

[0341] Referring to the drawing, in the first standby mode, the converter (925) in the image display device (100c) is turned on (S1810), and the latching relay (LAR) is turned off based on a reset signal (S1825).

[0342] Meanwhile, in the first standby mode, the converter (925) can output a first level voltage (Vzw) of approximately 3.3 V, and accordingly, a first level voltage (Vzw) of approximately 3.3 V can be supplied to the microcomputer (173).

[0343] Figure 19b is a flowchart showing the operation method of the image display device (100c) of Figure 18 in the second standby mode.

[0344] Referring to the drawing, in the second standby mode, the converter (925) in the image display device (100c) is turned on (S1820), the latching relay (LAR) is turned on based on a set signal (S1522), and the second converter (905) and the third converter (910) operate (S1824).

[0345] In the second standby mode, the third converter (910) can output a second level voltage (Vst) of approximately 8 V, and accordingly, a second level voltage (Vst) of approximately 8 V can be supplied to the signal processing device (170).

[0346] Fig. 19c is a flowchart showing the operation method of the image display device (100c) of Fig. 18 when switching from the first standby mode to the second standby mode.

[0347] Referring to the drawing, in the first standby mode, the converter (925) in the image display device (100c) is turned on (S1830), and in the first standby mode, the converter (925) outputs a first level voltage (Vzw) of approximately 3.3 V.

[0348] Meanwhile, as the transition to the second standby mode occurs, the converter (925) within the image display device (100c) outputs a second level voltage (Vst) of approximately 8 V (S1832) and enters the second standby mode.

[0349] Finally, when switching from the first standby mode to the second standby mode, the latching relay (LAR) is turned on based on the set signal (S1834), and the second converter (905) and the third converter (910) operate (S1836).

[0350] Accordingly, a second level voltage (Vst) higher than the first level can be supplied to the signal processing device (170), which ultimately reduces power consumption in standby mode.

[0351] FIG. 19d is a flowchart showing the operation method of the image display device (100c) of FIG. 18 when switching from the second standby mode to the first standby mode.

[0352] Referring to the drawing, in the second standby mode, in order to transition to the first standby mode, the latching relay (LAR) is turned off based on the reset signal of the latching relay (LAR) (S1850), and accordingly, the second converter (905) and the third converter (910) are turned off (S1852).

[0353] Next, upon transition to the first standby mode, the converter (925) within the image display device (100c) outputs a first level voltage (Vzw) of approximately 3.3 V (S1854) and enters the first standby mode (S1856).

[0354] Meanwhile, when switching from the second standby mode to the first standby mode, a first level voltage (Vzw) can be supplied to the signal processing device (170). Accordingly, power consumption in the standby mode can be reduced.

[0355] FIG. 20 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0356] Referring to the drawing, the image display device (100d) of FIG. 20 may further include a voltage step-down unit (177) that steps down the level of the DC voltage from the converter (925) to output a first level voltage (Vzw), compared to the image display device (100c) of FIG. 18.

[0357] Meanwhile, the converter (925) can output a fourth level voltage (Vow) higher than the first level of approximately 3.3 V in the first standby mode. The fourth level at this time can be approximately 4 V.

[0358] Meanwhile, the converter (925) outputs a fourth level voltage (Vow) higher than the first level in the first standby mode, and the voltage step-down unit (177) can step down the fourth level voltage (Vow) to the first level of approximately 3.3 V in the first standby mode.

[0359] 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 skilled 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. Display; A signal processing device that outputs a video signal to the above display; A relay element that switches an input AC voltage; A converter connected in parallel to one end of the above relay element; A microcomputer that operates based on a direct current voltage from the converter; A switch disposed between the converter and the signal processing device and operating based on a control signal output from the microcomputer; In the first standby mode, based on the off of the relay element, the off of the switch, and the operation of the converter, a voltage of the first level is supplied to the microcomputer, An image display device that supplies a voltage of a second level higher than the first level to the signal processing device based on the off state of the relay element, the operation of the switch, and the operation of the converter in the second standby mode.

2. In paragraph 1, The above converter, In the first standby mode, output the voltage of the first level, An image display device that outputs a voltage of the second level higher than the first level in the second standby mode.

3. In paragraph 1, A display device in which power consumption in the first standby mode is less than power consumption in the second standby mode.

4. In paragraph 1, A second converter connected to the other end of the relay element and converting the input AC voltage from the relay element into a DC voltage; An image display device further comprising a third converter that converts the level of the DC voltage from the second converter.

5. In paragraph 4, The above third converter, An image display device that supplies a voltage of a third level higher than the second level to the signal processing device based on the on of the relay element, the operation of the second converter, and the operation of the third converter in an operation mode after the first standby mode or the second standby mode.

6. In paragraph 1, An image display device in which, when switching from the first standby mode to the second standby mode, the switch is turned on and supplies a voltage of a second level higher than the first level to the signal processing device.

7. In paragraph 1, An image display device in which, when switching from the second standby mode to the first standby mode, the switch is turned off and the voltage of the first level is supplied to the signal processing device.

8. In paragraph 1, Further comprising a voltage step-down unit that steps down the level of the DC voltage from the converter to output the voltage of the first level; In the first standby mode, based on the off of the relay element, the off of the switch, the operation of the converter, and the operation of the voltage step-down unit, the voltage of the first level is supplied to the microcomputer. An image display device in which, in the second standby mode, a voltage of a second level higher than the first level is supplied to the signal processing device based on the off state of the relay element, the operation of the switch, and the operation of the converter.

9. In paragraph 8, The above converter, In the first standby mode, output a voltage of a fourth level higher than the first level, An image display device that outputs a voltage of the second level higher than the fourth level in the second standby mode.

10. In paragraph 8, The above converter, In the first standby mode, output a voltage of a fourth level higher than the first level, The above voltage step-down unit, An image display device that, in the first standby mode, forces the voltage of the fourth level to the first level.

11. In paragraph 9, The above voltage step-down unit, An image display device that, in the second standby mode, forces the voltage of the second level to the first level.

12. In paragraph 1, The above converter, A display device including a flyback converter.

13. Display; A signal processing device that outputs a video signal to the above display; A relay element that switches an input AC voltage; A converter connected in parallel to one end of the above relay element; A voltage step-down unit for stepping down the level of the DC voltage from the above converter; A microcomputer that operates based on a direct current voltage from the converter; A switch disposed between the converter and the signal processing device and operating based on a control signal output from the microcomputer; In the first standby mode, based on the off of the relay element, the off of the switch, the operation of the converter, and the operation of the voltage step-down unit, a voltage of the first level is supplied to the microcomputer, An image display device that supplies a voltage of a second level higher than the first level to the signal processing device based on the off state of the relay element, the operation of the switch, and the operation of the converter in the second standby mode.

14. In paragraph 13, A second converter connected to the other end of the relay element and converting the input AC voltage from the relay element into a DC voltage; An image display device further comprising a third converter that converts the level of the DC voltage from the second converter.

15. In paragraph 14, The above third converter, An image display device that supplies a voltage of a third level higher than the second level to the signal processing device based on the on of the relay element, the operation of the second converter, and the operation of the third converter in an operation mode after the first standby mode or the second standby mode.

Images