Video display device

Abstract

The present disclosure relates to a video display device. The video display device according to an embodiment of the present disclosure comprises: a display; a storage unit; a video reception unit for receiving a signal from the outside; and a signal processing device for outputting, to the display, a video signal based on the signal received by the video reception unit. The signal processing device controls to: receive, according to a viewing reservation mode or a recording reservation mode, broadcast program information for a viewing reservation or a recording reservation and keyword information related to the broadcast program information; and display, on the display, or store, in the storage unit, a video for a broadcast program after a keyword information detection point in time when the keyword information is detected from a video signal, an audio signal, or a data signal of the broadcast program after the broadcast program reserved for viewing or recording is started. Accordingly, it is possible to perform reserved viewing or reserved recording based on a keyword.

Description

Video display device

[0001] The present disclosure relates to a video display device, and more particularly, to a video display device capable of performing keyword-based reservation viewing or reservation recording.

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

[0003] In particular, the video display device can display a broadcast image based on a received broadcast signal.

[0004] Meanwhile, although the function for scheduled viewing or scheduled recording of broadcast programs is installed in the video display device, scheduled viewing or scheduled recording is performed from the start of the broadcast program.

[0005] In these cases, there is a disadvantage in that it is difficult for viewers to reserve viewing or recording only the parts they want.

[0006] The problem of the present disclosure is to provide a video display device capable of performing keyword-based reservation viewing or reservation recording.

[0007] Another problem of the present disclosure is to provide a video display device capable of performing scheduled viewing or scheduled recording of a portion of a broadcast program based on a keyword.

[0008] According to one embodiment of the present disclosure for solving the above problem, a video display device includes a display, a storage unit, an image receiving unit that receives a signal from the outside, and a signal processing unit that outputs an image signal based on a signal received from the image receiving unit to the display, wherein the signal processing unit receives broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information according to a viewing reservation mode or a recording reservation mode, and when keyword information is detected from a video signal, an audio signal, or a data signal of the corresponding broadcast program after the broadcast program for viewing reservation or recording reservation starts, controls an image for the broadcast program to be displayed on the display or stored in the storage unit from the time point of keyword information detection.

[0009] Meanwhile, the signal processing device receives a video signal, audio signal, or data signal of the broadcast program from the video receiving unit when a time related to the reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

[0010] Meanwhile, the video receiving unit includes a tuner unit that receives a broadcast signal, and the signal processing device receives a video signal, an audio signal, or a data signal of the broadcast program from the tuner unit when a time related to a reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the video for the broadcast program can be controlled to be displayed on a display or stored in a storage unit from the time of text detection.

[0011] Meanwhile, the video receiving unit includes an external device interface unit connected to a set-top box, and the signal processing unit receives a video signal, an audio signal, or a data signal of the broadcast program from the external device interface unit when a time related to a reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing unit can control the video of the broadcast program to be displayed on a display or stored in a storage unit from the time of text detection.

[0012] Meanwhile, the video receiving unit includes an external device interface unit connected to a set-top box, and the external device interface unit can transmit a power-on signal to the set-top box when the set-top box is powered off when a time related to a scheduled time of a broadcast program has been reached.

[0013] Meanwhile, the signal processing device receives a video signal, audio signal, or data signal of the broadcast program from an external device interface unit when the set-top box is turned on after a time related to the reservation time of the broadcast program has been reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on a display or stored in a storage unit from the time of text detection.

[0014] Meanwhile, the signal processing device receives a video signal of the broadcast program from the video receiving unit when a time related to the reservation time of the broadcast program is reached, extracts a subtitle image within the video signal, and, when text related to keyword information is detected within the extracted subtitle image, controls the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

[0015] Meanwhile, the signal processing device receives subtitle data of the broadcast program from the video receiving unit when a time related to the reservation time of the broadcast program is reached, and when text related to keyword information is detected within the received subtitle data, the signal processing device can control the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

[0016] Meanwhile, the signal processing device can extract start time information or channel information of a broadcast program based on broadcast program information for viewing reservation or recording reservation.

[0017] Meanwhile, the signal processing device can extract start time information or channel information of a broadcast program based on electronic program guide information.

[0018] Meanwhile, a video display device according to one embodiment of the present disclosure further includes a network interface unit for data exchange with an external network, and a signal processing device can be controlled to connect to a server that provides information about a broadcast program based on broadcast program information for viewing reservation or recording reservation, and receive start time information or channel information of the broadcast program from the server.

[0019] Meanwhile, a video display device according to one embodiment of the present disclosure further includes a power supply unit that supplies a DC voltage to each of a display and a signal processing unit, and the power supply unit can operate in a standby mode before reaching a time related to a scheduled time of a broadcast program, and can operate in a display off mode after reaching a time related to a scheduled time of a broadcast program.

[0020] Meanwhile, the power supply unit can operate in display on mode according to a viewing reservation when text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program.

[0021] Meanwhile, the power supply unit may operate in display off mode according to a recording schedule when text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program.

[0022] Meanwhile, the power supply unit may include a relay element that switches an input AC voltage, a first AC / DC converter connected to the relay element and converting the input AC voltage into a DC voltage, a second AC / DC converter that is separated from the relay element and converts the input AC voltage into a DC voltage, a first DC / DC converter that converts a level of a DC voltage from the first AC / DC converter and outputs a display driving voltage to a display, and a second DC / DC converter that converts a level of a DC voltage from the first AC / DC converter and outputs an operating voltage to a signal processing device.

[0023] Meanwhile, the power supply unit can output a standby voltage to the microcomputer in the standby mode based on the off state of the relay element and the operation of the second AC / DC converter, and can output an operating voltage to the signal processing device in the display off mode based on the on state of the relay element, the operation of the first AC / DC converter, and the operation of the second DC / DC converter.

[0024] Meanwhile, the power supply unit can output an operating voltage to the signal processing device and output a display driving voltage to the display based on the on state of the relay element, the operation of the first AC / DC converter, the first DC / DC converter, and the second DC / DC converter in the display on mode.

[0025] Meanwhile, a video display device according to another embodiment of the present disclosure includes a display, a storage unit that stores broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, an image receiving unit that receives a signal from the outside, and a signal processing unit that outputs a video signal based on a signal received from the image receiving unit to the display, wherein the signal processing unit controls, after a broadcast program for viewing reservation or recording reservation starts, to display a video for the broadcast program on the display or store the video for the broadcast program in the storage unit from the time point of keyword information detection, when keyword information is detected from a video signal, audio signal, or data signal of the corresponding broadcast program.

[0026] Meanwhile, the signal processing device receives a video signal, audio signal, or data signal of the broadcast program from the video receiving unit when a time related to the reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

[0027] According to one embodiment of the present disclosure, a video display device includes a display, a storage unit, an image receiving unit that receives a signal from the outside, and a signal processing unit that outputs an image signal based on a signal received from the image receiving unit to the display, wherein the signal processing unit receives broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information according to a viewing reservation mode or a recording reservation mode, and when keyword information is detected from a video signal, an audio signal, or a data signal of the corresponding broadcast program after the start of the viewing reservation or recording reservation broadcast program, controls the display or storage of an image for the broadcast program from the time of keyword information detection. Accordingly, keyword-based viewing reservation or recording reservation can be performed. In particular, it is possible to perform viewing reservation or recording reservation of a part of a broadcast program based on a keyword.

[0028] Meanwhile, when a time related to a scheduled time of a broadcast program is reached, the signal processing device receives a video signal, an audio signal, or a data signal of the broadcast program from the video receiving unit, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection. Accordingly, it becomes possible to perform scheduled viewing or scheduled recording of a portion of the broadcast program based on the keyword.

[0029] Meanwhile, the video receiving unit includes a tuner unit that receives a broadcast signal, and the signal processing device receives a video signal, an audio signal, or a data signal of the broadcast program from the tuner unit when a time related to a reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the video for the broadcast program can be controlled to be displayed on a display or stored in a storage unit from the time of text detection. Accordingly, reservation viewing or reservation recording of a portion of the broadcast program can be performed based on the keyword.

[0030] Meanwhile, the video receiving unit includes an external device interface unit connected to a set-top box, and the signal processing unit receives a video signal, an audio signal, or a data signal of the broadcast program from the external device interface unit when a time related to a reservation time of the broadcast program is reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the video of the broadcast program can be controlled to be displayed on a display or stored in a storage unit from the time of text detection. Accordingly, reservation viewing or reservation recording of a portion of the broadcast program can be performed based on the keyword.

[0031] Meanwhile, the video receiving unit includes an external device interface unit connected to a set-top box, and the external device interface unit can transmit a power-on signal to the set-top box when the set-top box is powered off at a time related to the scheduled time of the broadcast program. Accordingly, it is possible to perform scheduled viewing or scheduled recording of a portion of the broadcast program based on a keyword.

[0032] Meanwhile, the signal processing device receives a video signal, an audio signal, or a data signal of the broadcast program from an external device interface unit when the set-top box is turned on after a time related to the reservation time of the broadcast program has been reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on a display or stored in a storage unit from the time of text detection. Accordingly, it is possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0033] Meanwhile, when a time related to a scheduled time of a broadcast program is reached, the signal processing device receives a video signal of the broadcast program from the video receiving unit, extracts a subtitle image within the video signal, and, when text related to keyword information is detected within the extracted subtitle image, controls the video of the broadcast program to be displayed on a display or stored in a storage unit from the time of text detection. Accordingly, it becomes possible to perform scheduled viewing or scheduled recording of a portion of the broadcast program based on keywords.

[0034] Meanwhile, the signal processing device receives subtitle data of the broadcast program from the video receiving unit when a time related to the scheduled time of the broadcast program is reached, and if text related to keyword information is detected within the received subtitle data, the signal processing device can control the display or storage of the video of the broadcast program from the time of text detection. Accordingly, it is possible to perform scheduled viewing or scheduled recording of a portion of the broadcast program based on the keyword.

[0035] Meanwhile, the signal processing device can extract broadcast program start time information or channel information based on broadcast program information for viewing or recording reservations. Accordingly, reservation viewing or recording of a portion of a broadcast program can be performed based on keywords.

[0036] Meanwhile, the signal processing device can extract broadcast program start time information or channel information based on electronic program guide information. Accordingly, it is possible to perform scheduled viewing or scheduled recording of a portion of a broadcast program based on keywords.

[0037] Meanwhile, a video display device according to one embodiment of the present disclosure further includes a network interface unit for data exchange with an external network, and a signal processing device can be controlled to access a server providing information about a broadcast program based on broadcast program information for viewing reservations or recording reservations, and receive start time information or channel information of the broadcast program from the server. Accordingly, reservation viewing or reservation recording of a portion of a broadcast program can be performed based on keywords.

[0038] Meanwhile, a video display device according to one embodiment of the present disclosure further includes a power supply unit that supplies a DC voltage to each of a display and a signal processing unit, wherein the power supply unit operates in a standby mode before a time associated with a scheduled time of a broadcast program is reached, and operates in a display-off mode after the time associated with the scheduled time of the broadcast program is reached. Accordingly, power consumption can be reduced until the start of scheduled viewing or scheduled recording based on keywords.

[0039] Meanwhile, the power supply unit can operate in display-on mode based on a viewing reservation if text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program. This allows for reservation viewing of a portion of a broadcast program based on a keyword.

[0040] Meanwhile, the power supply unit can operate in display off mode according to a recording schedule when text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program. Accordingly, scheduled recording of a portion of a broadcast program can be performed based on the keyword.

[0041] Meanwhile, the power supply unit may include a relay element that switches an input AC voltage, a first AC / DC converter connected to the relay element and converting the input AC voltage into a DC voltage, a second AC / DC converter that is separated from the relay element and converts the input AC voltage into a DC voltage, a first DC / DC converter that converts a level of the DC voltage from the first AC / DC converter and outputs a display driving voltage to a display, and a second DC / DC converter that converts a level of the DC voltage from the first AC / DC converter and outputs an operating voltage to a signal processing device. Accordingly, power consumption can be reduced before the start of scheduled viewing or scheduled recording based on a keyword.

[0042] Meanwhile, the power supply unit can output a standby voltage to the microcomputer based on the off state of the relay element and the operation of the second AC / DC converter in the standby mode, and can output an operating voltage to the signal processing device based on the on state of the relay element and the operations of the first AC / DC converter and the second DC / DC converter in the display off mode. Accordingly, power consumption can be reduced until the start of scheduled viewing or scheduled recording based on a keyword.

[0043] Meanwhile, the power supply unit can output an operating voltage to the signal processing device and output a display driving voltage to the display based on the on state of the relay element, the operation of the first AC / DC converter, the first DC / DC converter, and the second DC / DC converter in the display on mode. Accordingly, it is possible to perform reservation viewing of a portion of a broadcast program based on a keyword.

[0044] Meanwhile, a video display device according to another embodiment of the present disclosure includes a display, a storage unit for storing broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, a video receiving unit for receiving a signal from the outside, and a signal processing unit for outputting a video signal based on a signal received from the video receiving unit to the display, wherein the signal processing unit controls, after a broadcast program for viewing reservation or recording reservation starts, to display a video for the broadcast program on the display or store the video for the broadcast program in the storage unit from the time of keyword information detection, when keyword information is detected from a video signal, audio signal, or data signal of the broadcast program. Accordingly, keyword-based viewing reservation or recording reservation can be performed. In particular, it is possible to perform viewing reservation or recording reservation of a portion of a broadcast program based on a keyword.

[0045] Meanwhile, when a time related to a scheduled time of a broadcast program is reached, the signal processing device receives a video signal, an audio signal, or a data signal of the broadcast program from the video receiving unit, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device can control the video of the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection. Accordingly, it becomes possible to perform scheduled viewing or scheduled recording of a portion of the broadcast program based on the keyword.

[0046] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0047] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0048] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0049] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0050] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0051] FIG. 5 is an example of an internal block diagram of a power supply unit in a video display device according to an embodiment of the present disclosure.

[0052] FIG. 6a is an example of a circuit diagram of a first ac / dc converter in the power supply unit of FIG. 5.

[0053] Fig. 6b is an example of a circuit diagram of a dc / dc converter in the power supply unit of Fig. 5.

[0054] FIG. 6c is an example of a circuit diagram of a second ac / dc converter in the power supply unit of FIG. 5.

[0055] Figures 7a to 7d are drawings referred to in the description of Figure 5.

[0056] FIGS. 8A to 8D are diagrams for reference in explaining the operation of a related image display device of the present disclosure.

[0057] FIG. 9a is a flowchart showing an operation method of an image display device according to one embodiment of the present disclosure.

[0058] FIG. 9b is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0059] FIGS. 10a to 12d are drawings referenced in the description of FIG. 9a or FIG. 9b.

[0060] Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

[0061] 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.

[0062] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0063] Referring to the drawing, the image display device (100) may include a display (180).

[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) can receive broadcast signals through an internal tuner unit (105 in FIG. 2).

[0068] Alternatively, the video display device (100) can be connected to a set-top box (STB) via a wired cable or the like, and can receive a broadcast signal through the set-top box (STB).

[0069] Meanwhile, the video display device (100) provides a function for reserved viewing or reserved recording of a broadcast program.

[0070] Accordingly, in this disclosure, a method is disclosed that allows a user to efficiently perform reservation viewing or reservation recording of only the desired portion.

[0071] To this end, an image display device (100) according to one embodiment of the present disclosure includes a display (180), a storage unit (140), an image receiving unit (105 in FIG. 2) that receives a signal from the outside, and a signal processing unit (170 in FIG. 2) that outputs an image signal based on a signal received from the image receiving unit (105) to the display (180).

[0072] Meanwhile, a signal processing device (170) according to an embodiment of the present disclosure receives broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, depending on a viewing reservation mode or a recording reservation mode, and, after a broadcast program for viewing reservation or recording reservation starts, if keyword information is detected from a video signal, audio signal, or data signal of the corresponding broadcast program, controls the display (180) to display the video for the broadcast program or store it in the storage (140) from the time of keyword information detection. Accordingly, keyword-based viewing reservation or recording reservation can be performed. In particular, viewing reservation or recording reservation of a portion of a broadcast program can be performed based on a keyword.

[0073] Meanwhile, a video display device (100) according to another embodiment of the present disclosure includes a display (180), a storage unit (140) that stores broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, an image receiving unit (105) that receives a signal from the outside, and a signal processing unit (170) that outputs an image signal based on a signal received from the image receiving unit (105) to the display (180).

[0074] Meanwhile, the signal processing device (170) according to the embodiment of the present disclosure, when keyword information is detected from a video signal, audio signal, or data signal of a broadcast program after a broadcast program for which viewing or recording is scheduled has started, controls the video for the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of keyword information detection. Accordingly, keyword-based viewing or recording can be performed. In particular, viewing or recording of a portion of a broadcast program can be performed based on keywords.

[0075] Meanwhile, the video display device (100) of Fig. 1 can be a TV, monitor, tablet PC, mobile terminal, etc.

[0076] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0077] 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).

[0078] An image display device (100) according to one embodiment of the present disclosure may further include a power supply unit (190) and a microcomputer (173).

[0079] 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).

[0080] 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).

[0081] 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.

[0082] 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).

[0083] 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.

[0084] The demodulation unit (120) receives the digital IF signal (DIF) converted from the tuner unit (110) and performs a demodulation operation.

[0085] 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.

[0086] 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).

[0087] 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).

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] Meanwhile, the network interface unit (135) may include a wireless communication unit (not shown).

[0093] 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.

[0094] 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.

[0095] 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).

[0096] 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.

[0097] 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).

[0098] 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.

[0099] 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.

[0100] 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).

[0101] 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).

[0102] 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.

[0103] 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.

[0104] 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).

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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).

[0109] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0110] The audio output unit (185) receives a signal processed by the signal processing device (170) and outputs it as voice.

[0111] 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).

[0112] 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.

[0113] 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.

[0114] Specifically, the power supply unit (190) may be equipped with a DC / DC converter that converts AC voltage into DC voltage and a DC / DC converter that converts the level of the DC voltage.

[0115] 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).

[0116] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0117] 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.

[0118] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0119] 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.

[0120] 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).

[0121] 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).

[0122] 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).

[0123] 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).

[0124] 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.

[0125] The scaler (335) can scale an input video signal that has been decoded by a video decoder (325), etc.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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).

[0131] 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.

[0132] 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.

[0133] In particular, the formatter (360) can change the format of the video signal to correspond to the display panel.

[0134] 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.

[0135] The processor (330) can control the overall operation within the image display device (100) or the signal processing device (170).

[0136] For example, the processor (330) can control the tuner (110) to select (tuning) an RF broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0137] 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).

[0138] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0139] 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).

[0140] Meanwhile, the audio processing unit (370) within the signal processing device (170) can perform audio processing of the demultiplexed audio signal. To this end, the audio processing unit (370) can be equipped with various decoders.

[0141] Additionally, the audio processing unit (370) within the signal processing device (170) can process bass, treble, volume control, etc.

[0142] 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.

[0143] 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.

[0144] In particular, the frame rate conversion unit (350) and formatter (360) may be provided separately from the image processing unit (320).

[0145] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0146] As shown in (a) of FIG. 4a, a pointer (205) corresponding to a remote control device (200) is displayed on the display (180).

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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).

[0152] 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).

[0153] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0154] 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).

[0155] 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.

[0156] 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.

[0157] 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).

[0158] 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.

[0159] 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.

[0160] 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).

[0161] 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).

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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).

[0166] 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).

[0167] 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).

[0168] 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).

[0169] 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).

[0170] 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.

[0171] 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.

[0172] 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.

[0173] FIG. 5 is an example of an internal block diagram of a power supply unit in a video display device according to an embodiment of the present disclosure.

[0174] 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 outputs a display driving voltage (Vdd) to the display (180) and an operating voltage (Vop) to the signal processing device (170).

[0175] 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 first AC / DC converter (905) that is connected to the relay element (RL) and converts the input AC voltage (Va) into a DC voltage, a second AC / DC converter (925) that is separated from the relay element (RL) and converts the input AC voltage (Va) into a DC voltage, and a converter (910) that converts the level of the DC voltage from the first AC / DC converter (905).

[0176] Meanwhile, the first ac / dc converter (905) converts the input alternating current voltage (Va) through the relay element (RL) into a direct current voltage, but the second ac / dc converter (925) can convert the input alternating current voltage (Va) that does not pass through the relay element (RL) into a direct current voltage.

[0177] That is, the relay element (RL) and the second ac / dc converter (925) can be connected in parallel.

[0178] Meanwhile, the converter (910) can output multiple levels of DC voltage.

[0179] For example, the converter (910) can convert the level of the DC voltage from the first ac / dc 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).

[0180] For this purpose, the converter (910) may be equipped with a multi-level LLC converter.

[0181] Meanwhile, the converter (910) may include a first dc / dc converter (912) that converts the level of the direct current voltage from the first ac / dc converter (905) and outputs a display driving voltage (Vdd) to the display (180), and a second dc / dc converter (915) that converts the level of the direct current voltage from the first ac / dc converter (905) and outputs an operating voltage (Vop) to the signal processing device (170).

[0182] For example, the first dc / dc converter (912) within the converter (910) can output a display driving voltage (Vdd) of approximately 24 V.

[0183] Meanwhile, the second dc / dc converter (915) within the converter (910) can output an operating voltage (Vop) of approximately 12 V or a standby voltage (Vst) of approximately 8 V to the signal processing device (170).

[0184] At this time, the first dc / dc converter (912) and the second dc / dc converter (915) can be connected in parallel.

[0185] In the drawing, a first dc / dc converter (912) is placed between the n3 node and the n1 node, and a second dc / dc converter (915) is placed between the n3 node and the n5 node.

[0186] Additionally, the drawing illustrates that a second AC / DC converter (925) is placed between the n2 node and the n6 node, and a first AC / DC converter (905) is placed between the n4 node and the n3 node.

[0187] Meanwhile, n1, the output node of the first dc / dc converter (912), can be electrically connected to the display (180).

[0188] The first AC / DC converter (905) can convert an input AC voltage (Va) into a DC voltage and output it by having a diode or switching element.

[0189] Meanwhile, the first dc / dc converter (912) can convert the level of the input DC voltage and output the display driving voltage (Vdd).

[0190] For example, the first dc / dc converter (912) can step up a direct current voltage and output a display driving voltage (Vdd).

[0191] 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.

[0192] 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.

[0193] 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.

[0194] Meanwhile, the image display device (100) according to one embodiment of the present disclosure further includes a main board (BD) including a signal processing device (170) and a microcomputer (173).

[0195] Meanwhile, the main board (BD) or signal processing device (170) can output a driving control signal (SSwd) to the second AC / DC converter (925). Accordingly, the second AC / DC converter (925) can be stably driven.

[0196] Meanwhile, the main board (BD) or signal processing device (170) can output a driving control signal (SSwa) to the first AC / DC converter (905). Accordingly, the first AC / DC converter (905) can be driven stably.

[0197] Meanwhile, the main board (BD) or signal processing device (170) can output a driving control signal (SSwb) to the first dc / dc converter (912) within the converter (910). Accordingly, the first dc / dc converter (912) within the converter (910) can be stably driven.

[0198] Meanwhile, the main board (BD) or signal processing device (170) can output a driving control signal (SSwc) to the second dc / dc converter (915) within the converter (910). Accordingly, the second dc / dc converter (915) within the converter (910) can be stably driven.

[0199] Meanwhile, the power supply unit (190) may further include a signal transmission unit (FDK) connected between the converter (910) and the main board (BD).

[0200] The signal transmission unit (FDK) can receive a display on signal (Spo) or a display off signal (Spf) from a main board (BD) 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 the converter (910).

[0201] For example, when the first dc / dc converter (912) within the converter (910) receives a display on signal (Spo), it can output a display driving voltage (Vdd) to the display (180) according to the display on mode.

[0202] As another example, when the first dc / dc converter (912) within the converter (910) receives a display off signal (Spf), it may not output the display driving voltage (Vdd) to the display (180) depending on the display off mode.

[0203] FIG. 6a is an example of a circuit diagram of a first ac / dc converter in the power supply unit of FIG. 5.

[0204] Referring to the drawing, the first ac / dc converter (905) of FIG. 5 has a plurality of switching elements (Sa, Sb) and a plurality of diode elements (Da, Db) to efficiently supply high-power power, and can convert the level of an input alternating current voltage (Vac) based on the switching operation of the switching elements (Sa, Sb) to output a direct current voltage (Vdc).

[0205] Specifically, the first ac / dc 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.

[0206] One end (cathode) of the first diode element (Da) is connected to one end (na) of the output terminal (na-nb) of the first ac / dc converter (905), and the other end (anode) of the first diode element (Da) can be connected to the first node (nc).

[0207] 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 first ac / dc converter (905).

[0208] One end (cathode) of the second diode element (Db) is connected to one end (na) of the output terminal (na-nb) of the first ac / dc converter (905), and the other end (anode) of the second diode element (Db) can be connected to the second node (nd).

[0209] 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 first ac / dc converter (905).

[0210] Meanwhile, the first AC / DC converter (905) of FIG. 6A can be named a half-bridge type AC / DC converter.

[0211] Meanwhile, the first ac / dc 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.

[0212] Meanwhile, a converter (910) connected to both ends of a dc capacitor (Ca) can be connected to the output terminal (nc-nd) of the first ac / dc converter (905).

[0213] Fig. 6b is an example of a circuit diagram of a dc / dc converter in the power supply unit of Fig. 5.

[0214] Referring to the drawing, the dc / dc converter (910) of FIG. 5 may be a multi-level LLC converter.

[0215] Meanwhile, the dc / dc converter (910) of FIG. 6b may be the first dc / dc converter (912) or the second dc / dc converter (915) of FIG. 5.

[0216] Meanwhile, the dc / dc converter (910) may include a transformer (805), a first switching element (SW1) and a second switching element (SW2) which 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) which 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.

[0217] Meanwhile, the dc / dc 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.

[0218] Meanwhile, it is preferable that no resistor elements are placed at both ends (nda-ndb) of the capacitor element (Cd).

[0219] 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.

[0220] Meanwhile, the dc / dc converter (910) may further include a voltage detection circuit (935) that detects the voltage across both ends of the second switching element (SW2).

[0221] Meanwhile, the dc / dc 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.

[0222] 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.

[0223] Meanwhile, the dc / dc converter (910) may further include a switching control unit (925) that controls the first switching element (SW1) and the second switching element (SW2).

[0224] 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.

[0225] FIG. 6c is an example of a circuit diagram of a second ac / dc converter in the power supply unit of FIG. 5.

[0226] Referring to the drawing, the second ac / dc converter (925) may include a flyback converter.

[0227] That is, the second ac / dc converter (925) may be equipped with 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).

[0228] 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.

[0229] Figures 7a to 7d are drawings referred to in the description of Figure 5.

[0230] FIG. 7a illustrates that the image display device (100) of FIG. 5 operates in standby mode.

[0231] Referring to the drawing, in standby mode, the relay element (RL) is turned off and the second ac / dc converter (925) can operate.

[0232] That is, the power supply unit (190) can output the standby voltage (Vzw) to the microcomputer (173) based on the off state of the relay element (RL) and the operation of the second ac / dc converter (925) in the standby mode.

[0233] In particular, the power supply unit (190) can output a standby voltage (Vzw) of approximately 3.3 V to the microcomputer (173) based on the current path of the PTHa through the second ac / dc converter (925) in standby mode.

[0234] Meanwhile, if the second ac / dc converter (925) is a flyback converter, the input side and the output side of the transformer (Ts) are insulated, so that the power consumed by the second ac / dc converter (925) is almost zero.

[0235] Therefore, the standby mode can be named zero watt standby mode.

[0236] Meanwhile, in standby mode, in addition to the microcomputer (173), the IR receiver (413) and the storage unit (140) are activated, and other modules may be turned off.

[0237] FIG. 7b illustrates that the image display device (100) of FIG. 5 operates in display off mode.

[0238] Referring to the drawing, in the display off mode, the relay element (RL) is turned on, and the first ac / dc converter (905) and the converter (910) can operate. In addition, in the display off mode, the second ac / dc converter (925) can also operate.

[0239] That is, the power supply unit (190) can output the operating voltage (Vop) to the signal processing device (170) based on the on state of the relay element (RL), the operation of the first ac / dc converter (905), and the second dc / dc converter (915) in the display off mode.

[0240] In particular, the power supply unit (190) can output an operating voltage (Vop) of approximately 8 to 12 V to the signal processing device (170) based on the current path of the PTHb through the relay element (RL), the first ac / dc converter (905), and the second dc / dc converter (915) in the display off mode.

[0241] Meanwhile, the power supply unit (190) can turn off the first dc / dc converter (912) in the display off mode.

[0242] Accordingly, the power supply unit (190) does not output the display driving voltage (Vdd) to the display (180) in the display off mode.

[0243] Meanwhile, in the display off mode, in addition to the signal processing device (170), the tuner unit (110), demodulation unit (120), network interface unit (130), external device interface unit (130), storage unit (140), microcomputer (173), IR receiver unit (413), etc. in the image receiving unit (105) may be activated.

[0244] Meanwhile, in display off mode, the display (180) and audio output (185) can be deactivated.

[0245] Alternatively, in display off mode, only the display (180) may be deactivated and the audio output (185) may be activated.

[0246] Meanwhile, similar to the display mode of Fig. 7b, it is also possible for a second standby mode to be performed.

[0247] For example, the power supply unit (190) can output a standby voltage (Vst) to the signal processing device (170) based on the on state of the relay element (RL), the operation of the first ac / dc converter (905), and the second dc / dc converter (915) in the second standby mode.

[0248] That is, the power supply unit (190) can output a standby voltage (Vst) having a lower level than the operating voltage (Vop) to the signal processing device (170) based on the current path of PTHb passing through the relay element (RL), the first ac / dc converter (905), and the second dc / dc converter (915) in the second standby mode.

[0249] Meanwhile, in the second standby mode, unlike the display mode, only the signal processing device (170), storage unit (140), microcomputer (173), IR receiver (413), etc. are activated, and the tuner unit (110), demodulation unit (120), network interface unit (130), external device interface unit (130), etc. in the image receiving unit (105) may be deactivated.

[0250] FIG. 7c illustrates that the image display device (100) of FIG. 5 operates in display on mode.

[0251] Referring to the drawing, in the display on mode, the relay element (RL) is turned on, and the first ac / dc converter (905), the first dc / dc converter (912), and the second dc / dc converter (915) can operate. In addition, in the display on mode, the second ac / dc converter (925) can also operate.

[0252] That is, the power supply unit (190) can output the operating voltage (Vop) to the signal processing device (170) and the display driving voltage (Vdd) to the display (180) based on the on state of the relay element (RL) and the operation of the first ac / dc converter (905), the first dc / dc converter (912), and the second dc / dc converter (915) in the display on mode.

[0253] In particular, the power supply unit (190) can output a display driving voltage (Vdd) of approximately 24 V to the display (180) based on the current path of PTHc through the relay element (RL), the first ac / dc converter (905), and the first dc / dc converter (912) in the display on mode.

[0254] Additionally, the power supply unit (190) can output an operating voltage (Vop) of approximately 8 to 12 V to the signal processing device (170) based on the current path of the PTHb through the relay element (RL), the first ac / dc converter (905), and the second dc / dc converter (915) in the display on mode.

[0255] Accordingly, in the display on mode, in addition to the signal processing device (170), the tuner unit (110), the demodulation unit (120), the network interface unit (130), the external device interface unit (130), the storage unit (140), the microcomputer (173), the IR receiver unit (413), the display (180), and the audio output unit (185) within the image receiving unit (105) can be activated.

[0256] FIG. 7d is a drawing explaining the operation of the power supply unit (190) in standby mode, display off mode, and display on mode.

[0257] Referring to the drawing, in standby mode, the relay (RL) is turned off, the first AC / DC converter (905) is turned off, the second AC / DC converter (925) is operated, the DC / DC converter (910) is turned off, and the display (180) is turned off.

[0258] Meanwhile, in the display off mode or the second standby mode, the relay (RL) is turned on, the first ac / dc converter (905) operates, and only the first dc / dc converter (912) within the dc / dc converter (910) operates, so that the display (180) is turned off.

[0259] Meanwhile, in the display on mode, the relay (RL) is turned on, the first ac / dc converter (905) operates, and both the first dc / dc converter (912) and the second dc / dc converter (915) within the dc / dc converter (910) operate, so that the display (180) is turned on.

[0260] FIGS. 8A to 8D are diagrams for reference in explaining the operation of a related image display device of the present disclosure.

[0261] Figure 8a is an example of a viewing reservation setting screen.

[0262] Referring to the drawing, the signal processing device (170) of the video display device (100) can display a setting screen (810) for setting a viewing reservation.

[0263] For example, the signal processing device (170) can display information about the viewing reservation time, viewing reservation channel, and viewing reservation program within the setting screen (810).

[0264] FIG. 8b is a drawing illustrating a viewing reservation being performed based on the viewing reservation setting screen of FIG. 8a.

[0265] Referring to the drawing, the video display device (100) can operate in a standby mode as in FIG. 7a until the TTa time corresponding to the timing of 18:30 on September 9, 2023, which is the viewing reservation time.

[0266] And, when the TTa point is reached, the video display device (100) can perform a display on mode as in FIG. 7c according to the viewing reservation.

[0267] Meanwhile, in the case of viewing a broadcast based on a viewing reservation, as shown in FIGS. 8a and 8b, there is an inconvenience in that the viewer cannot view only the portion he or she wants to view, and the video is displayed from the beginning of the program.

[0268] Figure 8c is an example of a recording reservation setting screen.

[0269] Referring to the drawing, the signal processing device (170) of the video display device (100) can display a setting screen (820) for setting recording reservation.

[0270] For example, the signal processing device (170) can display information about the recording reservation time, recording reservation channel, and recording reservation program within the setting screen (820).

[0271] FIG. 8d is a drawing illustrating recording reservation being performed based on the recording reservation setting screen of FIG. 8c.

[0272] Referring to the drawing, the video display device (100) can operate in a standby mode as in FIG. 7a until the TTb time corresponding to the timing of 19:30 on September 10, 2023, which is the recording reservation time.

[0273] And, when the TTa time point is reached, the video display device (100) can perform recording on mode according to the recording reservation.

[0274] Meanwhile, as shown in FIGS. 8c and 8d, when watching a broadcast based on a recording reservation, there is an inconvenience in that recording is performed from the beginning of the program, rather than recording only the portion desired by the viewer.

[0275] Accordingly, this disclosure discloses a method that allows viewers to schedule viewing or recording of only the portions they desire. In particular, a method for performing keyword-based scheduled viewing or recording is presented.

[0276] FIG. 9a is a flowchart showing an operation method of an image display device according to one embodiment of the present disclosure.

[0277] Referring to the drawings, FIG. 9a is a drawing showing an operational method for performing settings for viewing reservation or recording reservation.

[0278] Referring to the drawing, the signal processing device (170) of the video display device (100) can control the device to enter the viewing reservation mode or recording reservation mode when an input for viewing reservation or recording reservation is received (S910) based on a remote control device (200), etc.

[0279] Accordingly, the signal processing device (170) of the video display device (100) can display a setting screen for setting a viewing reservation or a setting screen for setting a recording reservation.

[0280] Meanwhile, the signal processing device (170) of the video display device (100) can be controlled to display the viewing reservation time according to the input of the viewing reservation time (S915), and can be controlled to display the viewing reservation channel according to the input of the viewing reservation channel (S920).

[0281] Meanwhile, the signal processing device (170) of the video display device (100) can be controlled to display the input keyword when there is an input keyword related to viewing reservation (S925).

[0282] That is, the signal processing device (170) receives broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, depending on the viewing reservation mode or recording reservation mode.

[0283] For example, the signal processing device (170) can receive keyword information related to broadcast program information through viewer voice recognition.

[0284] As another example, the signal processing device (170) can receive keyword information related to broadcast program information through keyword character input via a setting screen.

[0285] In addition, the signal processing device (170) of the video display device (100) can end the viewing reservation mode or recording reservation mode when the viewing reservation setting or recording reservation setting is completed.

[0286] That is, the signal processing device (170) of the video display device (100) can end the display of the setting screen for setting the viewing reservation or the setting screen for setting the recording reservation when the viewing reservation setting or the recording reservation setting is completed.

[0287] Meanwhile, the signal processing device (170) of the video display device (100) can be controlled to store information on set viewing reservations or recording reservations in the storage unit (140) through a setting screen, etc.

[0288] FIG. 9b is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0289] Referring to the drawing, FIG. 9b is a drawing showing an operation method for performing scheduled viewing or scheduled recording according to a set viewing reservation or recording reservation.

[0290] Referring to the drawing, the video display device (100) operates in standby mode as shown in FIG. 7a (S950).

[0291] Meanwhile, the video display device (100) operating in standby mode can end the standby mode and switch to the display off mode (S960), as shown in FIG. 7b, when the time related to the scheduled time of the broadcast program is reached (S955).

[0292] As the display switches to off mode, the signal processing device (170), the tuner unit (110) in the image receiving unit (105), the demodulation unit (120), the network interface unit (130), the external device interface unit (130), the storage unit (140), the microcomputer (173), the IR receiving unit (413), etc. may be activated.

[0293] Accordingly, the tuner unit (110) or external device interface unit (130) of the video display device (100) switches to a reservation channel corresponding to the viewing reservation or recording reservation (S970).

[0294] And, the signal processing device (170) receives a video signal, an audio signal, or a data signal from the switched reservation channel.

[0295] And, the signal processing device (170) extracts text from a video signal, audio signal, or data signal received from a reservation channel (S975).

[0296] Next, the signal processing device (170) determines whether the extracted text includes a reservation keyword (S980), and if so, switches to the display on mode (S987) according to the viewing reservation mode (S985) and controls the display of the video of the corresponding channel (S989).

[0297] Meanwhile, the signal processing device (170) determines whether the extracted text includes a reservation keyword (S980), and if so, can control recording of the video of the corresponding channel according to the recording reservation mode (S990) (S995).

[0298] Accordingly, keyword-based reservation viewing or reservation recording can be performed. In particular, reservation viewing or reservation recording of a portion of a broadcast program can be performed based on keywords.

[0299] According to FIGS. 9A and 9B, a signal processing device (170) according to one embodiment of the present disclosure receives broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information, depending on the viewing reservation mode or recording reservation mode.

[0300] In addition, the signal processing device (170), when keyword information is detected from the video signal, audio signal, or data signal of the broadcast program after the broadcast program for which viewing or recording is scheduled has started, controls the video for the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of keyword information detection. Accordingly, keyword-based viewing or recording can be performed. In particular, viewing or recording of a portion of the broadcast program can be performed based on keywords.

[0301] Meanwhile, when the signal processing device (170) reaches a time related to the reservation time of the broadcast program, it receives a video signal, audio signal, or data signal of the broadcast program from the video receiving unit (105), and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, it can control the video of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, it becomes possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0302] Meanwhile, when the signal processing device (170) reaches a time related to the reservation time of the broadcast program, it receives a video signal of the broadcast program from the video receiving unit (105), extracts a subtitle image within the video signal, and, when text related to keyword information is detected within the extracted subtitle image, it can control the video of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, it becomes possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0303] Meanwhile, when the signal processing device (170) reaches a time related to the reservation time of the broadcast program, it receives subtitle data of the broadcast program from the image receiving unit (105), and when text related to keyword information is detected within the received subtitle data, it can control the image of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, it becomes possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0304] Meanwhile, the signal processing device (170) can extract broadcast program start time information or channel information based on broadcast program information for viewing reservations or recording reservations. Accordingly, reservation viewing or reservation recording of a portion of a broadcast program can be performed based on keywords.

[0305] Meanwhile, the signal processing device (170) can extract broadcast program start time information or channel information based on electronic program guide information (EPG) included in the received data signal. Accordingly, reservation viewing or reservation recording of a portion of a broadcast program can be performed based on keywords.

[0306] Meanwhile, the signal processing device (170) can be controlled to access a server (not shown) that provides information about broadcast programs based on broadcast program information for viewing reservations or recording reservations, and receive start time information or channel information of the broadcast program from the server (not shown). Accordingly, reservation viewing or reservation recording of a portion of the broadcast program can be performed based on keywords.

[0307] Meanwhile, the power supply unit (190) within the video display device (100) according to one embodiment of the present disclosure may operate in standby mode before the time associated with the scheduled time of a broadcast program is reached, and may operate in display-off mode after the time associated with the scheduled time of the broadcast program is reached. Accordingly, power consumption can be reduced until the start of scheduled viewing or scheduled recording based on keywords.

[0308] Meanwhile, the power supply unit (190) can operate in display-on mode according to a viewing reservation when text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program. Accordingly, a portion of a broadcast program can be reserved for viewing based on a keyword.

[0309] Meanwhile, the power supply unit (190) may operate in display off mode according to a recording reservation when text related to keyword information is detected from a video signal, audio signal, or data signal of a broadcast program. Accordingly, it is possible to perform scheduled recording of a portion of a broadcast program based on a keyword.

[0310] FIGS. 10a to 12d are drawings referenced in the description of FIG. 9a or FIG. 9b.

[0311] First, FIG. 10a is an example of a viewing reservation setting screen according to one embodiment of the present disclosure.

[0312] Referring to the drawing, the signal processing device (170) of the video display device (100) can display a setting screen (1010) for setting a viewing reservation.

[0313] For example, the signal processing device (170) can display information about the viewing reservation time (1012), the viewing reservation channel (1014), and the viewing reservation program (1016) within the setting screen (1010).

[0314] Meanwhile, the signal processing device (170) can display a display window (1017) for keyword input within the setting screen (1010). Accordingly, keywords can be input easily.

[0315] Meanwhile, the signal processing device (170) can receive a keyword based on the user's voice or based on character input.

[0316] Figure 10b illustrates a keyword being entered into the settings screen of Figure 10a.

[0317] Referring to the drawing, the signal processing device (170) can control the display of input keyword information (1018) within the setting screen (1010) after receiving the keyword. Accordingly, keyword input and viewing reservation can be completed.

[0318] FIG. 10c is a drawing illustrating a viewing reservation being performed based on the viewing reservation setting screen of FIG. 10b.

[0319] Referring to the drawing, the video display device (100) can operate in a standby mode as shown in FIG. 7a until the Ta0 time point, which is a predetermined period earlier than the Ta1 time point corresponding to the viewing reservation time of 18:30 on September 9, 2023.

[0320] Meanwhile, the timing Ta0, which is a predetermined period earlier than the viewing reservation time, can be named as the time related to the reservation time of the broadcast program.

[0321] Meanwhile, when the time Ta0, which is a time related to the reservation time of the broadcast program, is reached, the video display device (100) can operate in a display off mode as in FIG. 7c according to the viewing reservation.

[0322] Meanwhile, in the display off mode, in addition to the signal processing device (170), the tuner unit (110), demodulation unit (120), network interface unit (130), external device interface unit (130), storage unit (140), microcomputer (173), IR receiver unit (413), etc. in the image receiving unit (105) may be activated.

[0323] Accordingly, the signal processing device (170) can receive a video signal, audio signal, or data signal of the broadcast program from before Ta1, which is the start time of the broadcast program scheduled for viewing or recording.

[0324] And, the signal processing device (170) can continuously receive a video signal, audio signal, or data signal of the broadcast program after Ta1, which is the start time of the broadcast program for which viewing or recording is scheduled.

[0325] Meanwhile, the signal processing device (170) controls the display to enter the display on mode as shown in FIG. 7c from Ta2, which is the keyword information detection time, when keyword information is detected from the video signal, audio signal, or data signal of the broadcast program after the broadcast program for viewing or recording has started.

[0326] That is, the signal processing device (170) can control the display (180) to display images of a broadcast program from Ta2, which is the keyword information detection point. Accordingly, it is possible to perform reservation viewing of a portion of a broadcast program based on keywords. In particular, the viewer can perform reservation viewing only of the portion desired.

[0327] Next, FIG. 11a is an example of a recording reservation setting screen according to one embodiment of the present disclosure.

[0328] Referring to the drawing, the signal processing device (170) of the video display device (100) can display a setting screen (1110) for setting recording reservation.

[0329] For example, the signal processing device (170) can display, within the setting screen (1110), information about the recording reservation time (1112), the recording reservation channel (1114), and the recording reservation program (1116).

[0330] Meanwhile, the signal processing device (170) can display a display window (1117) for keyword input within the setting screen (1110). Accordingly, keywords can be input easily.

[0331] Meanwhile, the signal processing device (170) can receive a keyword based on the user's voice or based on character input.

[0332] Figure 11b illustrates a keyword being entered into the settings screen of Figure 11a.

[0333] Referring to the drawing, the signal processing device (170) can be controlled to display the input keyword information (1118) within the setting screen (1110) after receiving the keyword. Accordingly, keyword input and recording reservation can be completed.

[0334] Figure 11c is a drawing illustrating that recording reservation is performed based on the recording reservation setting screen of Figure 11b.

[0335] Referring to the drawing, the video display device (100) can operate in a standby mode as shown in FIG. 7a until the time Tb0, which is a predetermined period earlier than the time Tb1 corresponding to the recording reservation time, 19:30 on September 10, 2023.

[0336] Meanwhile, the timing Tb0, which is a predetermined period earlier than the recording reservation time, can be named as the time related to the reservation time of the broadcast program.

[0337] Meanwhile, when the time Tb0, which is a time related to the reservation time of the broadcast program, is reached, the video display device (100) can operate in a display off mode as in FIG. 7c according to the recording reservation.

[0338] Meanwhile, in the display off mode, in addition to the signal processing device (170), the tuner unit (110), demodulation unit (120), network interface unit (130), external device interface unit (130), storage unit (140), microcomputer (173), IR receiver unit (413), etc. in the image receiving unit (115) may be activated.

[0339] Accordingly, the signal processing device (170) can receive a video signal, audio signal, or data signal of the broadcast program from before Tb1, which is the start time of the broadcast program scheduled for recording.

[0340] And, the signal processing device (170) can continuously receive a video signal, audio signal, or data signal of the broadcast program after Tb1, which is the start time of the broadcast program scheduled for recording.

[0341] Meanwhile, the signal processing device (170) controls the recording on mode to be entered after Tb2, which is the time point of keyword information detection, when keyword information is detected from the video signal, audio signal, or data signal of the broadcast program after the start of the broadcast program scheduled for recording.

[0342] That is, the signal processing device (170) can control the storage unit (140) to store images of a broadcast program starting from the keyword information detection point Tb2. Accordingly, it is possible to perform scheduled recording of a portion of a broadcast program based on keywords. In particular, it is possible to perform scheduled recording of only the portion desired by the viewer.

[0343] Figure 12a is a drawing illustrating the internal operation of a video display device in standby mode.

[0344] Referring to the drawing, in standby mode, the power supply unit (190) within the video display device (100) can output standby voltage (vzw) to the microcomputer (173) according to a signal path such as PMa.

[0345] Figure 12b is a drawing illustrating the internal operation of a video display device in display off mode.

[0346] Referring to the drawing, in the display off mode, in addition to the signal processing device (170), the tuner unit (110), the demodulation unit (120), the network interface unit (130), the external device interface unit (130), the storage unit (140), the microcomputer (173), the IR receiver unit (413), etc. in the image receiving unit (115) can be activated.

[0347] Accordingly, a broadcast video signal, a broadcast audio signal, or a broadcast data signal can be transmitted to a signal processing device (170) according to a signal path (PMb) such as a tuner unit (110), a demodulator unit (120), or a signal processing device (170).

[0348] Figure 12b is a drawing illustrating the internal operation of a video display device in display-on mode.

[0349] Referring to the drawing, in the display on mode, in addition to the signal processing device (170), the tuner unit (110), demodulation unit (120), network interface unit (130), external device interface unit (130), storage unit (140), microcomputer (173), IR receiver unit (413), display (180), audio output unit (185), etc. in the image receiving unit (115) may be activated.

[0350] Accordingly, according to the signal path (PMc) such as the tuner unit (110), the demodulator unit (120), the signal processing unit (170), and the display (180), the broadcast image processed in the signal processing unit (170) can be displayed on the display (180).

[0351] Meanwhile, with respect to FIG. 12c, when a time related to a reservation time of a broadcast program is reached, the signal processing device (170) receives a video signal, audio signal, or data signal of the broadcast program from the tuner unit (110), and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device (170) can control the video of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, reservation viewing or reservation recording of a portion of the broadcast program can be performed based on the keyword.

[0352] Meanwhile, unlike FIG. 12c, the broadcast signal can also be received from an external device interface unit (130) connected to a set-top box (STB), rather than a tuner unit (110).

[0353] That is, when the signal processing device (170) reaches a time related to the reservation time of the broadcast program, it receives a video signal, audio signal, or data signal of the broadcast program from the external device interface unit (130), and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, it can control the video of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, it becomes possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0354] Meanwhile, the external device interface unit (130) can transmit a power-on signal to the set-top box (STB) when the set-top box (STB) is powered off when the time related to the scheduled time of the broadcast program has been reached. Accordingly, reservation viewing or reservation recording of a portion of the broadcast program can be performed based on keywords.

[0355] Meanwhile, the signal processing device (170) receives a video signal, audio signal, or data signal of the broadcast program from the external device interface unit (130) when the set-top box (STB) is turned on after the time related to the reservation time of the broadcast program has been reached, and when text related to keyword information is detected from the video signal, audio signal, or data signal of the broadcast program, the signal processing device (170) can control the video of the broadcast program to be displayed on the display (180) or stored in the storage unit (140) from the time of text detection. Accordingly, it is possible to perform reservation viewing or reservation recording of a portion of the broadcast program based on the keyword.

[0356] Figure 12d is a drawing illustrating the internal operation of the video display device in recording on mode.

[0357] Referring to the drawing, in the recording on mode, in the same manner as in the display off mode, in addition to the signal processing device (170), the tuner unit (110), the demodulation unit (120), the network interface unit (130), the external device interface unit (130), the storage unit (140), the microcomputer (173), the IR receiver unit (413), etc. within the image receiving unit (115) can be activated.

[0358] At this time, the display (180), audio output unit (185), etc. may be deactivated.

[0359] Accordingly, broadcast images, etc. can be stored in the storage unit (140) according to the signal path (PMd) such as the tuner unit (110), the demodulator unit (120), the signal processing device (170), and the storage unit (140).

[0360] 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; storage; A video receiver that receives signals from outside; A signal processing device that outputs a video signal based on a signal received from the video receiving unit to the display; The above signal processing device, Depending on the viewing reservation mode or recording reservation mode, broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information are received, A video display device that controls, after the broadcast program for which viewing or recording has been scheduled has started, to display the video for the broadcast program on the display or store it in the storage unit from the time of detection of the keyword information when the keyword information is detected from the video signal, audio signal, or data signal of the broadcast program.

2. In paragraph 1, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the video signal or audio signal or data signal of the above broadcast program is received from the video receiving unit, A video display device that, when a text related to the keyword information is detected from a video signal, audio signal, or data signal of the broadcast program, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

3. In paragraph 1, The above video receiver, Includes a tuner section for receiving a broadcast signal, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the video signal or audio signal or data signal of the above broadcast program is received from the tuner unit, A video display device that, when a text related to the keyword information is detected from a video signal, audio signal, or data signal of the broadcast program, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

4. In paragraph 1, The above video receiver, Includes an external device interface section connected to a set-top box, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the video signal or audio signal or data signal of the above broadcast program is received from the external device interface unit, A video display device that, when a text related to the keyword information is detected from a video signal, audio signal, or data signal of the broadcast program, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

5. In paragraph 1, The above video receiver, Includes an external device interface section connected to a set-top box, The above external device interface section, A video display device that transmits a power-on signal to the set-top box when the set-top box is powered off when the time related to the reservation time of the above broadcast program has been reached.

6. In paragraph 5, The above signal processing device, After the time related to the reservation time of the above broadcast program has been reached, when the set-top box is turned on, it receives a video signal or audio signal or data signal of the above broadcast program from the external device interface unit, A video display device that, when a text related to the keyword information is detected from a video signal, audio signal, or data signal of the broadcast program, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

7. In paragraph 1, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the video signal of the above broadcast program is received from the video receiving unit, A video display device that extracts a subtitle image within the video signal, and, if text related to the keyword information is detected within the extracted subtitle image, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

8. In paragraph 1, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the subtitle data of the above broadcast program is received from the above video receiving unit, A video display device that controls, when text related to the keyword information is detected within the received subtitle data, the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

9. In paragraph 1, The above signal processing device, A video display device that extracts start time information or channel information of the broadcast program based on broadcast program information for the above viewing reservation or recording reservation.

10. In paragraph 1, The above signal processing device, A video display device that extracts start time information or channel information of a broadcast program based on electronic program guide information.

11. In paragraph 1, Further comprising a network interface section for data exchange with an external network; The above signal processing device, A video display device that controls to connect to a server that provides information about the broadcast program based on broadcast program information for the viewing reservation or recording reservation and to receive start time information or channel information of the broadcast program from the server.

12. In paragraph 1, Further comprising a power supply unit for supplying a DC voltage to each of the display and the signal processing device; The above power supply unit, It operates in standby mode before reaching the time related to the reservation time of the above broadcast program. A video display device that operates in a display off mode after reaching a time related to the reservation time of the above broadcast program.

13. In paragraph 12, The above power supply unit, A video display device that operates in display on mode according to the viewing reservation when text related to the keyword information is detected from the video signal, audio signal, or data signal of the broadcast program.

14. In paragraph 12, The above power supply unit, A video display device, which operates in the display off mode according to the recording reservation when a text related to the keyword information is detected from the video signal, audio signal, or data signal of the broadcast program.

15. In paragraph 12, The above power supply unit, A relay element that switches an input AC voltage; A first AC / DC converter connected to the above relay element and converting the input AC voltage into a DC voltage; A second ac / dc converter separated from the above relay element and converting the input ac voltage into a direct current voltage; A first dc / dc converter that converts the level of the direct current voltage from the first ac / dc converter and outputs a display driving voltage to the display; An image display device comprising a second dc / dc converter that converts the level of a direct current voltage from the first ac / dc converter and outputs an operating voltage to the signal processing device.

16. In paragraph 15, The above power supply unit, In the above standby mode, based on the off state of the relay element and the operation of the second ac / dc converter, the standby voltage is output to the microcomputer, An image display device, wherein, in the display off mode, the operating voltage is output to the signal processing device based on the on of the relay element, the operation of the first ac / dc converter, and the second dc / dc converter.

17. In paragraph 15, The above power supply unit, An image display device, wherein, in the display on mode, the operating voltage is output to the signal processing device and the display driving voltage is output to the display based on the on of the relay element, the operations of the first ac / dc converter, the first dc / dc converter, and the second dc / dc converter.

18. Display; A storage unit storing broadcast program information for viewing reservation or recording reservation and keyword information related to the broadcast program information; A video receiver that receives signals from outside; A signal processing device that outputs a video signal based on a signal received from the video receiving unit to the display; The above signal processing device, A video display device that controls, after the broadcast program for which viewing or recording has been scheduled has started, to display the video for the broadcast program on the display or store it in the storage unit from the time of detection of the keyword information when the keyword information is detected from the video signal, audio signal, or data signal of the broadcast program.

19. In paragraph 18, The above signal processing device, When the time related to the reservation time of the above broadcast program is reached, the video signal or audio signal or data signal of the above broadcast program is received from the video receiving unit, A video display device that, when a text related to the keyword information is detected from a video signal, audio signal, or data signal of the broadcast program, controls the video for the broadcast program to be displayed on the display or stored in the storage unit from the time of text detection.

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