Image display device

Abstract

An image display device according to one embodiment disclosed herein comprises: a display; an audio output unit for outputting sound; an interface for receiving a signal from an external sound output device; and a signal processing device for controlling to display a first image on the display on the basis of a first image signal from a sound output device, and controlling to output a first sound from the audio output unit on the basis of a first audio signal from the sound output device, wherein, if an external input mode is switched, the signal processing device controls to display a second image on the display on the basis of a second image signal received on the basis of the switching of the external input mode, controls to output a second sound from the audio output unit on the basis of a second audio signal received on the basis of the switching of the external input mode, and controls to transmit a third audio signal or a mute signal to the sound output device. Accordingly, when outputting the sound of the image display device, it is possible to reduce a sense of incongruity generated by different sounds from the sound output device or a set-top device.

Description

Video display device

[0001] The present disclosure relates to a video display device, and more specifically, to a video display device capable of reducing a sense of incongruity caused by other sounds from a sound output device or a set-top box device when sound is output from the video display device.

[0002] A video display device is a device capable of displaying various images.

[0003] Meanwhile, when an image is displayed on a video display device, a sound corresponding to the image is output.

[0004] In response to the demand for rich sound, the output power of video display devices during sound output is increasing, and furthermore, the use of separate sound output devices is on the rise.

[0005] However, during simultaneous sound output from a sound output device and a video display device, if the external input of the video display device changes, there is a disadvantage in that the video display device and the sound output device output sound corresponding to different content, which ultimately results in a sense of dissonance due to the different sounds from the video display device and the sound output device.

[0006] The problem to be solved by the present disclosure is to provide a video display device that can reduce the sense of incongruity caused by other sounds from a sound output device or a set-top box device when sound is output from the video display device.

[0007] Meanwhile, another problem to be solved by the present disclosure is to provide a video display device capable of outputting stable sound when the video display device outputs sound independently.

[0008] A video display device according to one embodiment of the present disclosure for achieving the above-mentioned problem comprises a display, an audio output unit that outputs sound, an interface that receives a signal from an external sound output device, and a signal processing device that controls the display to show a first image based on a first image signal from the sound output device and controls the audio output unit to output a first sound based on a first audio signal from the sound output device. When an external input mode is switched, the signal processing device controls the display to show a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a third audio signal or a mute signal to the sound output device.

[0009] Meanwhile, the signal processing device can control the transmission of a third audio signal corresponding to a second audio signal to the sound output device when switching to an external input mode, in the case of a simultaneous sound output mode with the sound output device.

[0010] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, receives a first video signal and a first audio signal from the sound output device in a first input mode, and in a second input mode in which the external input mode is switched, transmits a third audio signal corresponding to the second audio signal to the sound output device or transmits a mute signal.

[0011] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, and in a first input mode, receives a first video signal and a first audio signal from the sound output device through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and in a second input mode in which the external input mode is switched, transmits a third audio signal corresponding to the second audio signal to the sound output device or transmits a mute signal through some of the plurality of Transition Minimized Differential Signaling lanes or a utility line.

[0012] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, and in a first input mode, receives a first video signal and a first audio signal from the sound output device through a plurality of fixed rate link (FRL) lanes, and in a second input mode in which the external input mode is switched, transmits a third audio signal corresponding to the second audio signal to the sound output device or transmits a mute signal through some of the plurality of fixed rate link lanes or a utility line.

[0013] Meanwhile, the interface can receive information from the sound output device via the CEC line based on the power-on of the sound output device.

[0014] Meanwhile, the signal processing device can control the transmission of a mute signal to a sound output device when the video display device is in a single sound output mode or when signal transmission of the audio return channel to the sound output device is not possible when switching to an external input mode.

[0015] Meanwhile, the interface includes a first HDMI terminal and a second HDMI terminal, and in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from a sound output device through the first HDMI terminal, and in a second input mode in which the external input mode is switched, the second HDMI terminal can receive a second video signal and a second audio signal from a connected external device.

[0016] Meanwhile, in the second input mode, it is a simultaneous sound output mode with a sound output device, and if signal transmission of an audio return channel to the sound output device is possible, the first HDMI terminal can transmit a third audio signal corresponding to the second audio signal to the sound output device.

[0017] Meanwhile, the signal processing device controls sound to be output from the image display device, the sound output device, and the external device, respectively, when the second input mode is a joint sound output mode; controls sound to be output from the image display device and the external device, respectively, when the second input mode is a first simultaneous sound output mode; and controls sound to be output from the image display device and the sound output device, respectively, when the second input mode is a second simultaneous sound output mode.

[0018] Meanwhile, the interface includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support an audio return channel. When an external device is connected to the first HDMI terminal and a sound output device is connected to the second HDMI terminal, in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from the sound output device through the second HDMI terminal, and in a second input mode where the external input mode is switched, the first HDMI terminal receives a second video signal and a second audio signal from the connected external device, and the second HDMI terminal may not transmit a third audio signal or a mute signal to the sound output device.

[0019] A video display device according to another embodiment of the present disclosure includes a display, an audio output unit that outputs sound, an interface that receives a signal from an external set-top device, and a signal processing device that controls the display to show a first image based on a first image signal from the set-top device and controls the audio output unit to output a first sound based on a first audio signal from the set-top device. When an external input mode is switched, the signal processing device controls the display to show a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a mute signal to a set-top device or a sound output device connected to the set-top device.

[0020] Meanwhile, the interface is connected to the set-top device via a wired connection through an HDMI interface, receives a first video signal and a first audio signal from the set-top device in a first input mode, and can transmit a mute signal to the set-top device in a second input mode in which the external input mode is switched.

[0021] Meanwhile, the interface is connected to the set-top box device via a wired connection through an HDMI interface, and in the first input mode, receives a first video signal and a first audio signal from the set-top box device through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and in the second input mode where the external input mode is switched, can transmit a mute signal to the set-top box device through some of the plurality of Transition Minimized Differential Signaling lanes or a utility line.

[0022] Meanwhile, the interface is connected to the set-top device via a wired connection through an HDMI interface, and in the first input mode, receives a first video signal and a first audio signal from the set-top device through a plurality of fixed rate link (FRL) lanes, and in the second input mode where the external input mode is switched, can transmit a mute signal to the set-top device through some of the plurality of fixed rate link lanes or a utility line.

[0023] Meanwhile, the interface can receive information about the set-top box device through the CEC line based on the power-on of the set-top box device.

[0024] Meanwhile, the interface includes a first HDMI terminal and a second HDMI terminal, and in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from a set-top box device through the first HDMI terminal, and in a second input mode in which the external input mode is switched, the second HDMI terminal can receive a second video signal and a second audio signal from a connected external device.

[0025] Meanwhile, the interface includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support an audio return channel. When an external device is connected to the first HDMI terminal and a set-top device is connected to the second HDMI terminal, in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from the set-top device through the second HDMI terminal, and in a second input mode where the external input mode is switched, the first HDMI terminal receives a second video signal and a second audio signal from the connected external device, and the second HDMI terminal may not transmit a third audio signal or a mute signal to the set-top device.

[0026] An image display device according to one embodiment of the present disclosure comprises a display, an audio output unit that outputs sound, an interface that receives a signal from an external sound output device, and a signal processing device that controls the display to display a first image based on a first image signal from the sound output device and controls the audio output unit to output a first sound based on a first audio signal from the sound output device. When an external input mode is switched, the signal processing device controls the display to display a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a third audio signal or a mute signal to the sound output device. Accordingly, when the image display device outputs sound, the sense of incongruity caused by other sounds from the sound output device can be reduced. Furthermore, stable sound can be output when the image display device outputs sound alone.

[0027] Meanwhile, the signal processing device can control the transmission of a third audio signal corresponding to two audio signals to the sound output device when switching to an external input mode and in a simultaneous sound output mode with the sound output device. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0028] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, and receives a first video signal and a first audio signal from the sound output device in a first input mode, and in a second input mode in which the external input mode is switched, it can transmit a third audio signal corresponding to the second audio signal to the sound output device or transmit a mute signal. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0029] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, and in a first input mode, receives a first video signal and a first audio signal from the sound output device through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and in a second input mode in which the external input mode is switched, transmits a third audio signal corresponding to the second audio signal or transmits a mute signal to the sound output device through some of the plurality of Transition Minimized Differential Signaling lanes or a utility line. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0030] Meanwhile, the interface is connected to a sound output device via a wired connection through an HDMI interface, and in a first input mode, receives a first video signal and a first audio signal from the sound output device through a plurality of fixed rate link (FRL) lanes, and in a second input mode in which the external input mode is switched, transmits a third audio signal corresponding to the second audio signal to the sound output device or transmits a mute signal through some of the plurality of fixed rate link lanes or a utility line. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0031] Meanwhile, the interface can receive information from the sound output device via the CEC line based on the power-on of the sound output device. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0032] Meanwhile, the signal processing device can control the transmission of a mute signal to a sound output device when the video display device is in a standalone sound output mode or when signal transmission of the audio return channel to the sound output device is impossible when switching to an external input mode. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0033] Meanwhile, the interface includes a first HDMI terminal and a second HDMI terminal, and in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from a sound output device through the first HDMI terminal, and in a second input mode in which the external input mode is switched, the second HDMI terminal can receive a second video signal and a second audio signal from a connected external device. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0034] Meanwhile, in the second input mode, which is a simultaneous sound output mode with a sound output device, if signal transmission of the audio return channel to the sound output device is possible, the first HDMI terminal can transmit a third audio signal corresponding to the second audio signal to the sound output device. Accordingly, when sound is output by the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0035] Meanwhile, the signal processing device controls sound to be output from the video display device, the sound output device, and the external device, respectively, when the second input mode is a joint sound output mode; controls sound to be output from the video display device and the external device, respectively, when the second input mode is a first simultaneous sound output mode; and controls sound to be output from the video display device and the sound output device, respectively, when the second input mode is a second simultaneous sound output mode. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0036] Meanwhile, the interface includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support an audio return channel. When an external device is connected to the first HDMI terminal and a sound output device is connected to the second HDMI terminal, in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from the sound output device through the second HDMI terminal. In a second input mode where the external input mode is switched, the first HDMI terminal receives a second video signal and a second audio signal from the connected external device, and the second HDMI terminal may not transmit a third audio signal or a mute signal to the sound output device. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the sound output device can be reduced.

[0037] A video display device according to another embodiment of the present disclosure comprises a display, an audio output unit that outputs sound, an interface that receives a signal from an external set-top box device, and a signal processing device that controls the display to show a first image based on a first image signal from the set-top box device and controls the audio output unit to output a first sound based on a first audio signal from the set-top box device. When an external input mode is switched, the signal processing device controls the display to show a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a mute signal to the set-top box device or a sound output device connected to the set-top box device. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the set-top box device can be reduced. In particular, stable sound can be output when the video display device outputs sound alone.

[0038] Meanwhile, the interface is connected to the set-top box device via a wired connection through an HDMI interface, receives a first video signal and a first audio signal from the set-top box device in a first input mode, and can transmit a mute signal to the set-top box device in a second input mode in which the external input mode is switched. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the set-top box device can be reduced.

[0039] Meanwhile, the interface is connected to the set-top box device via a wired connection through an HDMI interface, and in the first input mode, receives a first video signal and a first audio signal from the set-top box device through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and in the second input mode, which is switched to an external input mode, can transmit a mute signal to the set-top box device through some of the plurality of Transition Minimized Differential Signaling lanes or through a utility line. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the set-top box device can be reduced.

[0040] Meanwhile, the interface is connected to the set-top box device via a wired connection through an HDMI interface, and in a first input mode, receives a first video signal and a first audio signal from the set-top box device through a plurality of fixed rate link (FRL) lanes, and in a second input mode where the external input mode is switched, transmits a mute signal to the set-top box device through some of the plurality of fixed rate link lanes or a utility line. Accordingly, when the video display device outputs sound, the sense of incongruity caused by other sounds from the set-top box device can be reduced.

[0041] Meanwhile, the interface can receive information from the set-top box device via the CEC line based on the power-on of the set-top box device. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the set-top box device can be reduced.

[0042] Meanwhile, the interface includes a first HDMI terminal and a second HDMI terminal, and in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from a set-top box device through the first HDMI terminal, and in a second input mode in which the external input mode is switched, the second HDMI terminal can receive a second video signal and a second audio signal from a connected external device. Accordingly, when sound is output from a video display device, the sense of incongruity caused by different sound from the set-top box device can be reduced.

[0043] Meanwhile, the interface includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support an audio return channel. When an external device is connected to the first HDMI terminal and a set-top box device is connected to the second HDMI terminal, in a first input mode, the first HDMI terminal receives a first video signal and a first audio signal from the set-top box device through the second HDMI terminal. In a second input mode where the external input mode is switched, the first HDMI terminal receives a second video signal and a second audio signal from the connected external device, and the second HDMI terminal may not transmit a third audio signal or a mute signal to the set-top box device. Accordingly, when sound is output from the video display device, the sense of incongruity caused by other sounds from the set-top box device can be reduced.

[0044] FIG. 1 is a drawing illustrating an image display system according to one embodiment of the present disclosure.

[0045] Figure 2 is an example of an internal block diagram of the image display device of Figure 1.

[0046] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0047] FIG. 4a is a diagram illustrating a control method of the remote control device of FIG. 2.

[0048] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0049] Figure 5 is an example of an internal block diagram of the sound output device of Figure 1.

[0050] Figure 6 is an example of an internal block diagram of a video display device according to the connection of an external device.

[0051] FIGS. 7a to 7e are drawings referenced in the description of FIG. 6.

[0052] FIGS. 8a to 8c are drawings illustrating various connections between an image display device and an external device according to an embodiment of the present disclosure.

[0053] FIG. 9 is an example of a method of operation of an image display device according to an embodiment of the present disclosure.

[0054] FIGS. 10a to 11d are drawings referenced in the description of FIG. 9.

[0055] FIG. 12 is an example of a method of operation of an image display device according to another embodiment of the present disclosure.

[0056] FIGS. 13a to 13c are drawings referenced in the description of FIG. 12.

[0057] FIGS. 14a to 14d are drawings referenced in the description of FIG. 9 or FIG. 12.

[0058] The present disclosure will be described in more detail below with reference to the drawings.

[0059] The suffixes "module" and "part" for components used in the following description are assigned solely for the ease of drafting this specification and do not inherently confer any particularly significant meaning or role. Accordingly, the terms "module" and "part" may be used interchangeably.

[0060] FIG. 1 is a drawing illustrating an image display system according to one embodiment of the present disclosure.

[0061] Referring to the drawings, an image display system (10) according to one embodiment of the present disclosure comprises an image display device (100) having a display (180) and a sound output device (400).

[0062] Meanwhile, the video display system (10) may further include an external device (300, 600, 1000 or 1100).

[0063] The external device (300, 400, 600, 100, or 1100) at this time may include any one of a set-top box device (300), a mobile terminal (600), a laptop (1000), or a game console (1100).

[0064] An image display device (100) according to one embodiment of the present disclosure can display an image and output sound based on an image signal and an audio signal from a sound output device (400).

[0065] Meanwhile, an image display device (100) according to one embodiment of the present disclosure can display an image and output a second sound based on the image signal and audio signal from a sound output device (400) while displaying an image and outputting a sound, when an external input mode is changed and a second image signal and a second audio signal are received from any one of the external devices (300, 400, 600, 100o or 1100), display a second image and output a second sound based on the image signal and audio signal from the external device (300, 400, 600, 100o or 1100).

[0066] At this time, it is preferable that the sound output device (400) outputs a sound corresponding to the second sound output from the video display device (100) or mutes it. Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the sound output device (400) can be reduced.

[0067] Meanwhile, the display (180) within the image display device (100) can be implemented as any one of various panels. For example, the display (180) can 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.

[0068] Meanwhile, the image display device (100) of FIG. 1 can be a TV, monitor, tablet PC, mobile terminal, etc.

[0069] Figure 2 is an example of an internal block diagram of the image display device of Figure 1.

[0070] Referring to FIG. 2, an image display device (100) according to one embodiment of the present disclosure may include an image receiving unit (105), an external device interface (130), a storage unit (140), a user input interface (150), a sensor device (not shown), a signal processing device (170), a display (180), and an audio output unit (185).

[0071] The video receiving unit (105) may include a tuner unit (110), a demodulator unit (120), a network interface (130), and an external device interface (130).

[0072] Meanwhile, the video receiving unit (105), unlike the drawing, may include only the tuner unit (110), the demodulation unit (120), and the external device interface (130). That is, it may not include the network interface (130).

[0073] The tuner unit (110) selects an RF (Radio Frequency) broadcast signal corresponding to a channel selected by the user or all previously stored channels among the RF broadcast signals received through an antenna (not shown). Additionally, it converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0074] 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 a signal processing device (170).

[0075] Meanwhile, the tuner unit (110) may be equipped with multiple tuners to receive multiple channels of broadcast signals. Alternatively, a single tuner that simultaneously receives multiple channels of broadcast signals is also possible.

[0076] The demodulator (120) receives the digital IF signal (DIF) converted by the tuner (110) and performs a demodulation operation.

[0077] The demodulation unit (120) can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, an audio signal, or a data signal is multiplexed.

[0078] The stream signal output from the demodulation unit (120) can be input to the signal processing unit (170). The signal processing unit (170) performs demultiplexing, video / audio signal processing, etc., then outputs video to the display (180) and outputs audio to the audio output unit (185).

[0079] The external device interface (130) can transmit or receive data with a connected external device (not shown), for example, a set-top box (50). To this end, the external device interface (130) may include an A / V input / output unit (not shown).

[0080] The external device interface (130) can be connected wirelessly or via wired connection to external devices such as a DVD (Digital Versatile Disk), Blu-ray, game console, camera, camcorder, computer (laptop), set-top box, etc., and can also perform input / output operations with the external devices.

[0081] 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.

[0082] Through such a wireless communication unit (not shown), the external device interface (130) can exchange data with an adjacent mobile terminal (600). In particular, the external device interface (130) can receive device information, information on an application being executed, an application image, etc. from the mobile terminal (600) in mirroring mode.

[0083] The network interface (135) provides an interface for connecting the video display device (100) to a wired / wireless network including the Internet network. For example, the network interface (135) can receive content or data provided by the Internet or a content provider or network operator through the network.

[0084] Meanwhile, the network interface (135) may include a wireless communication unit (not shown).

[0085] The storage unit (140) may store a program for each signal processing and control within the signal processing device (170), and may also store a signal-processed image, voice, or data signal.

[0086] Additionally, the storage unit (140) may perform the function of temporarily storing video, audio, or data signals input to the external device interface (130). Additionally, the storage unit (140) may store information regarding a predetermined broadcast channel through a channel memory function such as a channel map.

[0087] Although an embodiment in which the storage unit (140) of FIG. 2 is provided separately from the signal processing device (170) is illustrated, the scope of the present disclosure is not limited thereto. The storage unit (140) may be included within the signal processing device (170).

[0088] The user input interface (150) transmits a signal input by the user to a signal processing device (170) or transmits a signal from the signal processing device (170) to the user.

[0089] For example, user input signals such as power on / off, channel selection, and screen settings can be transmitted / received from a remote control device (200), user input signals input from local keys (not shown) such as a power key, channel key, volume key, and setting value can be transmitted to a signal processing device (170), user input signals input from a sensor device (not shown) that senses a user's gesture can be transmitted to a signal processing device (170), or signals from the signal processing device (170) can be transmitted to a sensor device (not shown).

[0090] The signal processing device (170) can demultiplex a stream input through the tuner unit (110), the demodulator unit (120), the network interface (135), or the external device interface (130), or process the demultiplexed signals to generate and output a signal for video or audio output.

[0091] For example, the signal processing device (170) can receive a broadcast signal or an HDMI signal, etc., received from the video receiving unit (105), perform signal processing based on the received broadcast signal or HDMI signal, and output a signal-processed video signal.

[0092] The image signal processed by the signal processing device (170) can be input to the display (180) and displayed as an image corresponding to the image signal. Additionally, the image signal processed by the signal processing device (170) can be input to an external output device through the external device interface (130).

[0093] The voice signal processed by the signal processing device (170) can be sound-outputted at the audio output unit (185). Additionally, the voice signal processed by the signal processing device (170) can be input to an external output device through the external device interface (130).

[0094] Although not illustrated in FIG. 2, the signal processing device (170) may include a demultiplexer, an image processing unit, etc. That is, the signal processing device (170) can perform various signal processing and, accordingly, can be implemented in the form of a System On Chip (SOC). This will be described later with reference to FIG. 3.

[0095] In addition, the signal processing device (170) can control the overall operation within the image display device (100). For example, the signal processing device (170) can control the tuner unit (110) to control the selection (tuning) of an RF broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0096] Additionally, 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 (150).

[0097] 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 video, and may be a 2D image or a 3D image.

[0098] Meanwhile, the signal processing device (170) can cause a predetermined object to be displayed within the image displayed on the display (180). For example, the object may 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.

[0099] Meanwhile, the signal processing device (170) can recognize the user's location based on an image captured by a shooting unit (not shown). For example, it can determine the distance (z-axis coordinate) between the user and the image display device (100). In addition, it can determine the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location.

[0100] The display (180) generates a driving signal by converting a video signal, data signal, OSD signal, control signal processed by a signal processing device (170) or a video signal, data signal, control signal, etc. received from an external device interface (130).

[0101] Meanwhile, the display (180) can be configured as a touch screen and used as an input device in addition to an output device.

[0102] The audio output unit (185) receives a voice-processed signal from the signal processing unit (170) and outputs it as voice.

[0103] The shooting unit (not shown) photographs the user. The shooting unit (not shown) can be implemented with one camera, but is not limited thereto, and can also be implemented with multiple cameras. The image information captured by the shooting unit (not shown) can be input to the signal processing device (170).

[0104] The signal processing device (170) can detect a user's gesture based on each or a combination of an image captured from a shooting unit (not shown) or a signal detected from a sensor device (not shown).

[0105] The power supply unit (190) supplies power throughout the 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.

[0106] Specifically, the power supply unit (190) may be equipped with a converter that converts AC power into DC power and a DC / DC converter that converts the level of DC power.

[0107] The remote control device (200) transmits user input to the user input interface (150). To this end, the remote control device (200) may use Bluetooth, RF (Radio Frequency) communication, infrared (IR) communication, UWB (Ultra Wideband), ZigBee, etc. Additionally, the remote control device (200) may receive video, audio, or data signals output from the user input interface (150) and display or output them as audio on the remote control device (200).

[0108] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0109] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is a block diagram for an embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display device (100) actually implemented. That is, as needed, two or more components may be combined into one component, or one component may be subdivided into two or more components. Furthermore, the functions performed in each block are intended to explain the embodiments of the present disclosure, and the specific operations or devices thereof do not limit the scope of the rights of the present disclosure.

[0110] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0111] Referring to the drawings, a signal processing device (170) according to one embodiment of the present disclosure may include a demultiplexer (310), an image processing unit (320), a processor (330), and an audio processing unit (370). Additionally, it may further include a data processing unit (not shown).

[0112] The demultiplexer (310) demultiplexes the input stream. For example, if an 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).

[0113] The image processing unit (320) can perform signal processing on the input image. For example, the image processing unit (320) can perform image processing on the image signal demultiplexed from the demultiplexing unit (310).

[0114] 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), etc.

[0115] The video decoder (325) decodes the demultiplexed video signal, and the scaler (335) performs scaling so that the resolution of the decoded video signal can be output on the display (180).

[0116] The image decoder (325) may be equipped with decoders of various specifications. For example, it may be equipped with MPEG-2, H,264 decoders, 3D image decoders for color images or depth images, decoders for multiple viewpoint images, etc.

[0117] The scaler (335) can scale the input video signal, which has been decoded in the video decoder (325), etc.

[0118] For example, the scaler (335) can upscale when the size or resolution of the input video signal is small, and downscale when the size or resolution of the input video signal is large.

[0119] The image quality processing unit (635) can perform image quality processing on the input image signal, which has been decoded in the image decoder (325), etc.

[0120] For example, the image processing unit (635) can perform noise removal processing of the input video signal, expand the resolution of the grayscale of the input video signal, perform image resolution enhancement, perform high dynamic range (HDR) based signal processing, vary the frame rate, or perform image processing corresponding to the panel characteristics.

[0121] The OSD processing unit (340) generates an OSD signal based on user input or independently. For example, based on a user input signal, it can generate a signal to display various information as graphics or text on the screen of the display (180). The generated OSD signal may include various data such as user interface screens, various menu screens, widgets, and icons of the image display device (100). Additionally, the generated OSD signal may include 2D objects or 3D objects.

[0122] Additionally, the OSD processing unit (340) can generate a pointer that can be displayed on a display based on a pointing signal input from the remote control device (200). In particular, such a pointer can be generated by a pointing signal processing device, and the OSD processing unit (240) may include such a pointing signal processing device (not shown). Of course, it is also possible for the pointing signal processing device (not shown) to be provided separately rather than being provided within the OSD processing unit (240).

[0123] The frame rate converter (FRC) (350) can convert the frame rate of the input video. Meanwhile, the frame rate converter (350) can also output the video as is without separate frame rate conversion.

[0124] Meanwhile, the formatter (360) can convert the format of the input video signal into a video signal for display on a display and output it.

[0125] In particular, the formatter (360) can change the format of the video signal to correspond to the display panel.

[0126] Meanwhile, the formatter (360) may change the format of the video signal. For example, the format of the 3D video signal may be changed to any one of various 3D formats such as Side by Side format, Top / Down format, Frame Sequential format, Interlaced format, Checker Box format.

[0127] The processor (330) can control the overall operation within the image display device (100) or the signal processing device (170).

[0128] 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.

[0129] Additionally, the processor (330) can control the image display device (100) by a user command or internal program input through the user input interface (150).

[0130] Additionally, the processor (330) can perform data transmission control with the network interface (135) or the external device interface (130).

[0131] Additionally, the processor (330) can control the operation of the demultiplexer (310), image processing unit (320), etc., within the signal processing device (170).

[0132] Meanwhile, the audio processing unit (370) within the signal processing device (170) can perform voice processing of the demultiplexed voice signal. To this end, the audio processing unit (370) may be equipped with various decoders.

[0133] Additionally, the audio processing unit (370) within the signal processing device (170) can process bass, treble, volume control, etc.

[0134] A data processing unit (not shown) within a signal processing device (170) can perform data processing of a demultiplexed data signal. For example, if the demultiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal may be Electronic Program Guide information containing broadcast information such as the start time and end time of a broadcast program aired on each channel.

[0135] Meanwhile, the block diagram of the signal processing device (170) illustrated in FIG. 3 is a block diagram for an embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the signal processing device (170) actually implemented.

[0136] In particular, the frame rate converter (350) and the formatter (360) may be provided separately from the image processing unit (320).

[0137] FIG. 4a is a diagram illustrating a control method of the remote control device of FIG. 2.

[0138] As illustrated in (a) of FIG. 4a, a pointer (205) corresponding to the remote control device (200) is displayed on the display (180).

[0139] 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 image display device corresponds to the movement of the remote control device (200). Since the pointer (205) of the remote control device (200) moves and is displayed according to the movement in 3D space as shown in the drawing, it can be named a spatial remote control device (200) or a 3D pointing device.

[0140] Figure 4a (b) illustrates that when the user moves the remote control device (200) to the left, the pointer (205) displayed on the display (180) of the image display device also moves to the left in response.

[0141] Information regarding the movement of the remote control device (200) detected through 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 regarding the movement of the remote control device (200). The image display device can display the pointer (205) to correspond to the calculated coordinates.

[0142] Figure 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). By doing so, the selected area within the display (180) corresponding to the pointer (205) can be zoomed in and enlarged. Conversely, when the user moves the remote control device (200) closer to the display (180), the selected area within the display (180) corresponding to the pointer (205) can be zoomed out and reduced. Meanwhile, when the remote control device (200) moves away from the display (180), the selected area is zoomed out, and when the remote control device (200) moves closer to the display (180), the selected area may be zoomed in.

[0143] Meanwhile, when a specific button within the remote control device (200) is pressed, recognition of up-down and left-right movement may be excluded. That is, when the remote control device (200) moves away from or closer to the display (180), up-down, left-right movement is not recognized, and only forward-backward movement is recognized. When the specific button within the remote control device (200) is not pressed, only the pointer (205) moves according to the up-down, left-right movement of the remote control device (200).

[0144] Meanwhile, the movement speed or direction of movement of the pointer (205) can correspond to the movement speed or direction of movement of the remote control device (200).

[0145] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0146] 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).

[0147] 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.

[0148] In this embodiment, the remote control device (200) may be equipped with an RF module (421) capable of transmitting and receiving signals to and from the image display device (100) according to RF communication standards. Additionally, the remote control device (200) may be equipped with an IR module (423) capable of transmitting and receiving signals to and from the image display device (100) according to IR communication standards.

[0149] In this embodiment, the remote control device (200) transmits a signal containing information regarding the movement of the remote control device (200), etc., to the video display device (100) through the RF module (421).

[0150] Additionally, the remote control device (200) can receive a signal transmitted by the video display device (100) through the RF module (421). Additionally, the remote control device (200) can transmit commands regarding power on / off, channel change, volume change, etc. to the video display device (100) through the IR module (423) as needed.

[0151] The user input unit (435) may be composed of a keypad, buttons, a touchpad, or a touch screen. The user may input commands 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) is equipped with a hard key button, the user may input commands related to the image display device (100) to the remote control device (200) through a push operation of the hard key button. If the user input unit (435) is equipped with a touch screen, the user may input commands related to the image display device (100) to the remote control device (200) by touching the soft keys of the touch screen. Additionally, 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 this embodiment does not limit the scope of the rights of this disclosure.

[0152] The sensor unit (440) may be equipped with a gyroscope sensor (441) or an accelerometer sensor (443). The gyroscope sensor (441) can sense information regarding the movement of the remote control device (200).

[0153] For example, the gyroscope sensor (441) can sense information regarding the operation of the remote control device (200) based on the x, y, and z axes. The accelerometer sensor (443) can sense information regarding the movement speed of the remote control device (200), etc. Meanwhile, a distance measuring sensor may be further provided, thereby allowing the distance to be sensed from the display (180).

[0154] The output unit (450) can output a video or audio signal corresponding to the operation of the user input unit (435) or 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 operated or whether the video display device (100) is controlled.

[0155] 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 when 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, a sound output module (455) that outputs sound, or a display module (457) that outputs image.

[0156] 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) does not move for a predetermined period of time. The power supply unit (460) can resume the power supply when a predetermined key provided in the remote control device (200) is operated.

[0157] The storage unit (470) may store various types of programs, application data, etc., necessary for the control or operation of the remote control device (200). If the remote control device (200) transmits and receives signals wirelessly through the video display device (100) and the RF module (421), the remote control device (200) and the video display device (100) transmit and receive signals through a predetermined frequency band. The control unit (480) of the remote control device (200) may store and refer to information regarding the frequency band, etc., for wirelessly transmitting and receiving signals with the video display device (100) paired with the remote control device (200) in the storage unit (470).

[0158] 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) through the wireless communication unit (425).

[0159] The user input interface (150) of the image 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).

[0160] The user input interface (150) can wirelessly transmit and receive signals to and from the remote control device (200) through the RF module (412). It can also receive signals transmitted by the remote control device (200) according to the IR communication standard through the IR module (413).

[0161] 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 for hand tremor or error from the signal corresponding to the operation of the remote control device (200) received through the wireless communication unit (151).

[0162] A transmission signal from a remote control device (200) input to a video display device (100) through a user input interface (150) is transmitted to a signal processing device (170) of the video display device (100). The signal processing device (170) can determine information regarding 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) accordingly.

[0163] As another example, the remote control device (200) can calculate a pointer coordinate value corresponding to the operation and output it to the user input interface (150) of the image display device (100). In this case, the user input interface (150) of the image display device (100) can transmit information regarding the received pointer coordinate value to the signal processing device (170) without a separate hand tremor or error correction process.

[0164] 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 (150) as in the drawing.

[0165] Figure 5 is an example of an internal block diagram of the sound output device of Figure 1.

[0166] Referring to the drawing, the sound output device (400) may include a sensing unit (530), a communication device (535), a memory (540), an interface (550), an audio output unit (560), a control unit (570), an input unit (585), and a power supply unit (590). When implemented in actual applications, these components may be configured such that two or more components are combined into one component as needed, or one component is subdivided into two or more components.

[0167] The sensing unit (530) may be equipped with an inertial sensor (not shown). The inertial sensor may be equipped with an accelerometer, a gyroscope, a gravity sensor, etc. For example, the accelerometer, gyroscope, gravity sensor, etc. may be equipped with a 6-axis sensor.

[0168] The sensing unit (530) can output motion information of the sound output device (400), for example, motion information (acceleration information, angular velocity information) or position information based on the x, y, and z axes.

[0169] Meanwhile, the sensing unit (530) may sense temperature information, current information, voltage information, etc. of the sound output device.

[0170] Meanwhile, the communication device (535) may provide an interface for communication with an external device. To this end, the communication device (535) may include a first communication module (535a) and a second communication module (535b).

[0171] For example, the first communication module (535a) within the communication device (535) can be a wireless communication module and provide an interface for wireless data communication such as Bluetooth.

[0172] For example, the second communication module (535b) within the communication device (535) may be a wireless communication module and may provide an interface for wireless data communication such as Wi-Fi or UWB.

[0173] The memory (540) may store a program for processing or controlling the control unit (570) within the sound output device (400), and may also perform the function of temporarily storing input or output data.

[0174] For example, the memory (540) can store output power information or additional offset information of the sound output device (400).

[0175] The interface (550) can provide an interface for wired data communication such as HDMI.

[0176] For example, the interface (550) can transmit output power information or additional offset information of the sound output device (400) to the video display device (100).

[0177] The audio output unit (560) can output sound based on the audio signal processed by the control unit (570) within the sound output device (400).

[0178] The control unit (570) can control the operation of each unit within the sound output device (400) to control the overall operation of the sound output device (400).

[0179] Meanwhile, the control unit (570) can perform signal processing for audio signals received from the outside.

[0180] Meanwhile, the control unit (570) can play an audio signal received from the first communication module (535a) or the second communication module (535b).

[0181] Meanwhile, the input unit (585) may be equipped with a button for initializing or operating the sound output device (400).

[0182] Meanwhile, the input unit (585) may be equipped with a microphone (587) for sound collection.

[0183] Meanwhile, the input unit (585) may be equipped with a camera (not shown) for taking images.

[0184] The power supply unit (590) can supply power necessary for the operation of each component under the control of the control unit (570).

[0185] In particular, the power supply unit (590) may be equipped with a battery (not shown) that stores and outputs DC power.

[0186] Figure 6 is an example of an internal block diagram of a video display device according to the connection of an external device.

[0187] Figure 6 is an example of an internal block diagram of a video display device according to the connection of an external device.

[0188] Referring to the drawings, an image display device (100) according to an embodiment of the present disclosure has an interface (130a) that exchanges data with an external device (300, 400, 600, 100 or 1100) connected by a wired cable (CB), and a signal processing device (170).

[0189] The interface (130a) may be an HDMI interface.

[0190] Meanwhile, the signal processing device (170) can transmit display identifier data stored in memory (140) to an external device (300, 400, 600, 100 or 1100) through the interface (130a).

[0191] An external device (300, 400, 600, 100 or 1100) can transmit video data or audio data based on the received display identifier data.

[0192] Meanwhile, the interface (130a) can receive video data or audio data from an external device (300, 400, 600, 100 or 1100).

[0193] Meanwhile, the signal processing device (170) may be equipped with an interface controller (630) for controlling the interface (130a), a video driver (609) for image processing, an audio driver (607) for audio processing, a video output interface (641) for video output to a display (180), a first audio output interface (640) for audio output to an audio output unit (185), and a second audio output interface (645) for audio output to an external device (300, 400, 600, 100 or 1100).

[0194] The video driver (609) and the audio driver (607) can correspond to the image processing unit (320) and the audio processing unit (370) of FIG. 3, respectively.

[0195] The video driver (609) can decode video data from an external device (300, 400, 600, 100 or 1100) and output the decoded video data (Svo).

[0196] The video output interface (641) can receive decoded video data (Svo) from the video driver (609) and output video data (Sda) to the display (180).

[0197] The audio driver (607) can decode audio data from an external device (300, 400, 600, 100 or 1100) and output the decoded audio data (Sao,Sau).

[0198] The first audio output interface (640) can receive decoded audio data (Sao) from the audio driver (607) and output audio data (Sada) to the audio output unit (185).

[0199] The second audio output interface (645) can receive decoded audio data (Sau) from the audio driver (607) and output audio data (Sadb) to an external device (300, 400, 600, 100 or 1100).

[0200] Meanwhile, the interface (130a) may be an interface of the HDMI 2.0 standard or an interface of the HDMI 2.1 standard. This is described with reference to FIGS. 7a to 7e.

[0201] FIGS. 7a to 7e are drawings referenced in the description of FIG. 6.

[0202] First, Fig. 7a is a diagram illustrating the interface of the HDMI 2.0 standard.

[0203] Referring to the drawing, the interface (550) within the external device (300, 400, 600, 100, or 1100) may be equipped with an HDMI transmission unit (482) for transmitting video signals.

[0204] Meanwhile, the interface (550) within the external device (300, 400, 600, 100, or 1100) may further include a CEC terminal (463), a HEAC terminal (464), and an HPD terminal (466).

[0205] Meanwhile, the interface (130a) within the video display device (100) may be equipped with an HDMI receiver (132) for receiving video signals.

[0206] Meanwhile, the interface (130a) within the video display device (100) may further include an EDID EOM (134), a CEC terminal (137), and a HEAC terminal (138).

[0207] Between the HDMI transmission unit (482) and the HDMI reception unit (132), a plurality of lanes (Lna~LNd), a Display data channel line (Lne), a CEC line (LNf), a Utility line (LNg), and an HPD line (LNh) may be arranged.

[0208] Meanwhile, multiple lanes may be Transition Minimized Differential Signaling (TMDS) lanes.

[0209] For example, video signals, etc., may be transmitted through three of the multiple lanes (Lna to LNd), and a clock signal may be transmitted through one of the multiple lanes (Lna to LNd).

[0210] Figure 7b illustrates the CEC data format of the CEC line in Figure 7a.

[0211] Referring to the drawing, the CEC data format (700) may include a plurality of information bits, EOM, and ACK.

[0212] Next, FIG. 7c is a diagram illustrating the interface of the HDMI 2.1 standard.

[0213] Referring to the drawing, the interface (550b) within the external device (300, 400, 600, 100, or 1100) may be equipped with an HDMI transmission unit (482b) for transmitting video signals.

[0214] Meanwhile, the interface (130b) within the video display device (100) may be equipped with an HDMI receiver (132b) for receiving video signals.

[0215] Between the HDMI transmission unit (482b) and the HDMI reception unit (132b), a plurality of lanes (Lnab~LNdb), SCL line, SDA line, CEC line, Utility line, HPD line, etc. may be arranged.

[0216] Meanwhile, multiple lanes may be Fixed Rate Link (FRL) lanes.

[0217] For example, video signals or data signals, etc., can be transmitted through multiple lanes (Lnab~LNdb).

[0218] Fig. 7d is an example of an internal block diagram of the HDMI transmission unit of Fig. 7c.

[0219] Referring to the drawing, the HDMI transmission unit (482b) of FIG. 7c may include a first scrambler (716) that scrambles a video signal or an audio signal in a first transmission mode, FRL mode; a first encoder (718) that encodes a signal from the first scrambler (716); a second scrambler (713) that scrambles a signal encrypted by the encryption unit (709) in a second transmission mode, TMDS mode; a second encoder (715) that encodes a signal from the second scrambler (713); and a signal selector (719) that selects and outputs either a signal from the first encoder (718) or a signal from the second encoder (715).

[0220] Meanwhile, the signal from the signal selector (719) can be output externally through the physical layer (720) and the port.

[0221] Meanwhile, the HDMI transmission unit (482b) may further include an encryption authentication unit (711) that provides an encryption security key, and an encryption unit (709) that encrypts a video signal or audio signal using the security key.

[0222] That is, the first scrambler (716) can scramble the signal encrypted in the encryption unit (709) into the first transmission mode, FRL mode.

[0223] Additionally, the second scrambler (713) can scramble the signal encrypted in the encryption unit (709) into the second transmission mode, TMDS mode.

[0224] Accordingly, the video signal or audio signal can be transmitted in the first transmission mode, FRL mode, or in the second transmission mode, TMDS mode.

[0225] FIG. 7e is an example of an internal block diagram of the HDMI receiver (132b) of FIG. 7c.

[0226] Referring to the drawing, the HDMI receiver (132b) of FIG. 7c can receive a signal from the outside through a port and a physical layer (730).

[0227] The HDMI receiver (132b) of FIG. 7c may include a signal selector (731) that selects and outputs either an input signal based on a first transmission mode or an input signal based on a second transmission mode, a first decoder (736) that decodes a video signal or an audio signal among the input signals into an FRL mode which is the first transmission mode, a third scrambler (738) that scrambles a signal from the first decoder (736), a second decoder (732) that decodes a video signal or an audio signal among the input signals into a TMDS mode which is the second transmission mode, and a fourth scrambler (734) that scrambles a signal from the second decoder (732).

[0228] Meanwhile, the HDMI receiver (132b) of FIG. 7c may further include an encryption authentication unit (740) that provides an encryption security key, and an encryption decryption unit (739) that performs encryption decryption using the encryption security key on a signal from a third scrambler (738) or a fourth scrambler (734).

[0229] Meanwhile, the HDMI receiver (132b) of FIG. 7c may further include a disparity checker (735) that performs a disparity check based on a signal from the first decoder (736).

[0230] Accordingly, video signals or audio signals can be received based on the first transmission mode, FRL mode, or based on the second transmission mode, TMDS mode.

[0231] FIGS. 8a to 8c are drawings illustrating various connections between an image display device and an external device according to an embodiment of the present disclosure.

[0232] FIG. 8a illustrates an example of a connection between a video display device (100) and a sound output device (400).

[0233] Referring to the drawings, an image display device (100) according to an embodiment of the present disclosure comprises a display (180), an audio output unit (185) for outputting sound, an interface (130) for receiving a signal from an external sound output device (400), and a signal processing device (170).

[0234] Meanwhile, the interface (130) may be equipped with an HDMI interface (130a).

[0235] In particular, the interface (130) includes a first HDMI terminal (TTa) that supports an audio return channel.

[0236] In the drawing, one end of the first cable (CBa) is connected to the first HDMI terminal (TTa) that supports an audio return channel. At this time, the first HDMI terminal (TTa) may be an HDMI IN terminal.

[0237] Meanwhile, the other end of the first cable (CBa) can be connected to an HDMI terminal (Ta2) that supports an audio return channel among the plurality of terminals (Ta1~Ta4) of the sound output device (400). At this time, the HDMI terminal (Ta2) may be an HDMI OUT terminal.

[0238] As shown in FIG. 8a, when the image display device (100) and the sound output device (400) are connected via a wire, the signal processing device (170) of the image display device (100) controls the display (180) to display a first image (1010 in FIG. 10a) based on a first image signal from the sound output device (400), and controls the audio output unit (185) to output a first sound (Saa in FIG. 10a) based on a first audio signal from the sound output device (400).

[0239] That is, the display (180) of the image display device (100) displays a first image (1010) based on an image signal from a sound output device (400), the audio output unit (185) of the image display device (100) outputs a first sound (Saa), and the sound output device (400) can output a sound (Sab of FIG. 10) corresponding to the first audio signal.

[0240] FIG. 8b illustrates an example of a connection between a video display device (100) and a sound output device (400).

[0241] Referring to the drawing, the interface (130) of the video display device (100) is exemplified as including a second HDMI terminal (TTb) that does not support an audio return channel.

[0242] In the drawing, one end of the second cable (CBb) is connected to the second HDMI terminal (TTb) that does not support an audio return channel. In this case, the second HDMI terminal (TTb) may be an HDMI IN terminal.

[0243] Meanwhile, the other end of the second cable (CBb) can be connected to an HDMI terminal (Tb1) that does not support an audio return channel among the plurality of terminals (Tb1~Tb4) of the sound output device (400). At this time, the HDMI terminal (Tb1) may be an HDMI OUT terminal.

[0244] As shown in FIG. 8a, when the image display device (100) and the sound output device (400) are connected via a wire, the signal processing device (170) of the image display device (100) controls the display (180) to display a first image (1010 in FIG. 10a) based on a first image signal from the sound output device (400), and controls the audio output unit (185) to output a first sound (Saa in FIG. 10a) based on a first audio signal from the sound output device (400).

[0245] That is, the display (180) of the image display device (100) displays a first image (1010) based on an image signal from a sound output device (400), the audio output unit (185) of the image display device (100) outputs a first sound (Saa), and the sound output device (400) can output a sound (Sab of FIG. 10) corresponding to the first audio signal.

[0246] FIG. 8c illustrates an example of a connection between a video display device (100), a sound output device (400), and a game console (1100).

[0247] Referring to the drawing, the interface (130) of the video display device (100) may include a first HDMI terminal (TTa) that supports an audio return channel and a second HDMI terminal (TTb) that does not support an audio return channel.

[0248] In the drawing, one end of the first cable (CBa) is connected to the first HDMI terminal (TTa) that supports an audio return channel, and one end of the second cable (CBb) is connected to the second HDMI terminal (TTb) that does not support an audio return channel. At this time, the first HDMI terminal (TTa) and the second HDMI terminal (TTb) may be HDMI IN terminals.

[0249] Meanwhile, the other end of the first cable (CBa) can be connected to an HDMI terminal (Ta2) that supports an audio return channel among the plurality of terminals (Ta1~Ta4) of the sound output device (400). At this time, the HDMI terminal (Ta2) may be an HDMI OUT terminal.

[0250] Meanwhile, the other end of the second cable (CBb) can be connected to an HDMI terminal (Tc1) that does not support an audio return channel among a plurality of terminals (Tc1 to Tc4) of a game console (1100), which is an example of an external device. At this time, the HDMI terminal (Tc1) may be an HDMI OUT terminal.

[0251] As shown in FIG. 8c, when the image display device (100) and the sound output device (400) are connected via a wire, the signal processing device (170) of the image display device (100) controls the display (180) to display the first image (1010) based on the first image signal from the sound output device (400), and controls the audio output unit (185) to output the first sound (Saa of FIG. 10a) based on the first audio signal from the sound output device (400).

[0252] That is, the display (180) of the image display device (100) displays a first image (1010) based on an image signal from a sound output device (400), the audio output unit (185) of the image display device (100) outputs a first sound (Saa), and the sound output device (400) can output a sound (Sab of FIG. 10) corresponding to the first audio signal.

[0253] Meanwhile, the signal processing device (170) controls the display (180) to display a second image (1020 in FIG. 10c) based on the second image signal received based on the switching of the external input mode when the external input mode is switched, controls the audio output unit (185) to output a second sound (Sba in FIG. 10c) based on the second audio signal received based on the switching of the external input mode, and controls the sound output device (400) to transmit a third audio signal (Audio in FIG. 10c) corresponding to the second audio signal or to transmit a mute signal (Smt in FIG. 10d).

[0254] Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the sound output device (400) can be reduced. Furthermore, when the video display device (100) outputs sound independently, stable sound can be output.

[0255] For example, the signal processing device (170) can switch the external input mode from the sound output device (400) to the external input mode from the game console (100) when the external input mode is switched.

[0256] Accordingly, the video display device (100) outputs a first video and a first sound corresponding to a video signal and an audio signal from a sound output device (400), and then, based on the switching of an external input mode, outputs a second video and a second sound corresponding to a second video signal and a second audio signal from a game console (100).

[0257] At this time, the sound output device (400) outputs a sound corresponding to the first sound, and based on the switching of the external input mode, outputs a third sound corresponding to the second sound based on the game console (100), or stops the output of sound. Accordingly, when the video display device (100) outputs sound, the sense of strangeness caused by different sounds from the sound output device (400) can be reduced.

[0258] FIG. 9 is an example of a method of operation of an image display device according to an embodiment of the present disclosure.

[0259] Referring to the drawings, a signal processing device (170) in an image display device (100) according to one embodiment of the present disclosure determines whether a first image signal and a first audio signal from a sound output device (400) are input (S910), and if applicable, controls the display (180) to display a first image (1010) based on the first image signal from the sound output device (400), and controls the audio output unit (185) to output a first sound (Saa) based on the first audio signal from the sound output device (400) (S915).

[0260] In the case where the interface (130) within the image display device (100) according to one embodiment of the present disclosure is equipped with an HDMI interface (130a), the connection status of the sound output device (400) or the power-on status of the connected sound output device (400) can be detected through the HPD line.

[0261] And, when the signal processing device (170) in the video display device (100) detects that the sound output device (400) is connected and the power is turned on, it can switch the external input mode to an input mode based on the sound output device (400).

[0262] And, the signal processing device (170) within the video display device (100) can determine whether a first video signal and a first audio signal from a sound output device (400) are input through the interface (130), and if so, control the output of a first video corresponding to the first video signal and a first sound corresponding to the first audio signal through respective signal processing.

[0263] Next, the signal processing device (170) within the video display device (100) determines whether the external input mode is switched (S922), and if so, determines whether the video display device (100) and the sound output device (400) are in a simultaneous sound output mode (S922). If so, based on the switching of the external input mode, it controls the output of a second video and a second sound based on the switched external source, and controls the transmission of a second audio signal corresponding to the audio signal from the switched external source to the sound output device (400) (S925).

[0264] Accordingly, the sound output device (400) can output a sound corresponding to the second image, rather than a sound corresponding to the first image, and consequently, a simultaneous sound output mode of the image display device (100) and the sound output device (400) can be stably implemented.

[0265] Meanwhile, the signal processing device (170) within the video display device (100) determines whether the video display device (100) is in a single sound output mode when it is not in a simultaneous sound output mode at step 922 (S922) (S927), and if applicable, controls to output a second video and a second sound based on the switched external source based on the switching of the external input mode, and controls to transmit a mute signal to the sound output device (400) (S930).

[0266] Accordingly, the sound output device (400) stops outputting sound corresponding to the first image, and consequently, the single sound output mode of the image display device (100) can be stably implemented.

[0267] FIGS. 10a to 11d are drawings referenced in the description of FIG. 9.

[0268] FIG. 10a illustrates a sound output device being wired to a video display device.

[0269] Referring to the drawings, an image display device (100) according to one embodiment of the present disclosure includes a display (180), an audio output unit (185) that outputs sound, an interface (130) that receives a signal from an external sound output device (400), and a signal processing device (170) that controls the display (180) to display a first image (1010) based on a first image signal from the sound output device (400) and controls the audio output unit (185) to output a first sound (Saa) based on a first audio signal from the sound output device (400).

[0270] Meanwhile, the interface (130) of the video display device (100) can be connected to the sound output device (400) via a wire through the HDMI interface (130a).

[0271] For example, when the sound output device (400) is powered on, the interface (130) can receive device information, transmission content information, etc. of the sound output device (400) through the CEC line.

[0272] The device information at this time may include information indicating that the set-top box device (300) is connected to the sound output device (400).

[0273] Meanwhile, the transmitted content information may include video signal information to be transmitted and audio signal information to be transmitted.

[0274] For example, if a set-top box device (300) is connected to a sound output device (400) and the set-top box device (300) can transmit a first video signal and a first audio signal to the sound output device (400), the sound output device (400) can transmit device information, transmission content information, etc. of the sound output device (400) through a CEC line.

[0275] In response to this, the interface (130) of the video display device (100) receives device information, transmission content information, etc. of the sound output device (400) through a CEC line, and thereafter, in a first input mode, can receive a first video signal and a first audio signal from the sound output device (400) through a plurality of Transition Minimized Differential Signaling (TMDS) lanes or a plurality of Fixed Rate Link (FRL) lanes.

[0276] Meanwhile, the signal processing device (170) can control the display (180) to display a first image (1010) based on a first image signal from the sound output device (400) in the first input mode when the sound output device (400) is in a simultaneous sound output mode, and can control the audio output unit (185) to output a first sound (Saa) based on a first audio signal from the sound output device (400).

[0277] Meanwhile, the sound output device (400) can output a sound (Sab) corresponding to the first audio signal. Accordingly, stable sound can be output in a simultaneous sound output mode.

[0278] Meanwhile, the signal processing device (170) may control the display (180) to display a first image (1010) based on a first image signal from the sound output device (400) in the first input mode when the sound output device (400) is in a single sound output mode, and may also control the audio output unit (185) not to output sound related to the first audio signal from the sound output device (400).

[0279] FIG. 10b illustrates a state in which at least one of the external devices is wired connected to a video display device related to the present disclosure while a sound output device is wired connected to the video display device.

[0280] Referring to the drawing, the external device may be a game console (1100), a laptop (1000), a mobile terminal (600), etc.

[0281] For example, when a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, and the external input mode is changed from a sound output device to a game console, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0282] In response to this, a second image (1020) corresponding to the second image signal is displayed on the display (180), and the audio output unit (185) can output a second sound (Sba) corresponding to the second audio signal.

[0283] However, the sound output device (400) can output a sound (Sab) corresponding to the first audio signal input from the set-top box device (300). Accordingly, in a simultaneous sound output mode, the video display device (100) and the sound output device (400) output sounds of different sources, so a sense of incongruity with different sounds occurs.

[0284] Accordingly, in the present disclosure, in order to reduce the sense of strangeness of such different sounds, when the external input mode is switched, an audio signal corresponding to the switching of the external input mode is transmitted to the sound output device (400), or a mute signal for stopping the sound output is transmitted. This is described in more detail with reference to FIG. 10c, etc.

[0285] FIG. 10c illustrates an example of a wired connection of at least one of the external devices when a sound output device is wired to a video display device according to an embodiment of the present disclosure.

[0286] Referring to the drawing, the external device may be a game console (1100), a laptop (1000), a mobile terminal (600), etc.

[0287] For example, when a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, and the external input mode is changed from a sound output device to a game console, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0288] The signal processing device (170) controls the display (180) to display a second image (1020) based on a second image signal received based on the switching of the external input mode when the external input mode is switched, controls the audio output unit (185) to output a second sound (Sba) based on a second audio signal received based on the switching of the external input mode, and controls the sound output device (400) to transmit a third audio signal corresponding to the second audio signal or transmit a mute signal (Smt). Accordingly, when sound is output from the image display device (100), the sense of incongruity caused by other sounds from the sound output device (400) can be reduced.

[0289] Meanwhile, the signal processing device (170) can control the transmission of a third audio signal (AUDIO) corresponding to a second audio signal to the sound output device (400) as shown in the drawing when switching to an external input mode, in the case of a simultaneous sound output mode with the sound output device (400).

[0290] Accordingly, the sound output device (400) can output a sound (Sbb) corresponding to a third audio signal (AUDIO) input from a video display device (100), rather than a sound (Sab) corresponding to a first audio signal input from a set-top device (300).

[0291] Accordingly, in simultaneous sound output mode, since the video display device (100) and the sound output device (400) output sound of the same source, the sense of incongruity caused by different sound from the sound output device (400) can be reduced when the video display device (100) outputs sound.

[0292] Meanwhile, the interface (130) may include a first HDMI terminal (TTa) and a second HDMI terminal (TTb).

[0293] Meanwhile, the interface (130) receives a first video signal and a first audio signal from a sound output device (400) through the first HDMI terminal (TTa) in the first input mode, and in the second input mode where the external input mode is switched, the second HDMI terminal (TTb) can receive a second video signal and a second audio signal from a connected external device.

[0294] Meanwhile, the interface (130) may include a first HDMI terminal (TTa) that supports an audio return channel and a second HDMI terminal (TTb) that does not support an audio return channel.

[0295] Meanwhile, in the second input mode, which is a simultaneous sound output mode with the sound output device (400), if signal transmission of the audio return channel to the sound output device (400) is possible, the first HDMI terminal (TTa) can transmit a third audio signal corresponding to the second audio signal to the sound output device (400). Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the sound output device (400) can be reduced.

[0296] Meanwhile, the signal processing device (170) can control sound to be output from the video display device (100), the sound output device (400), and the game console (1100), which is an example of an external device, respectively, in the second input mode when it is a joint sound output mode.

[0297] Meanwhile, the signal processing device (170) may control the output of sound from the video display device (100) and the game console (1100), which is an example of an external device, respectively, when the first simultaneous sound output mode is the second input mode.

[0298] Meanwhile, the signal processing device (170) can control the video display device (100) and the sound output device (400) to output sound respectively when the second input mode is the second simultaneous sound output mode. Accordingly, stable simultaneous sound output is possible through a combination of various devices.

[0299] FIG. 10d illustrates another example of a wired connection of at least one of the external devices when a sound output device is wired to a video display device according to an embodiment of the present disclosure.

[0300] Referring to the drawing, the external device may be a game console (1100), a laptop (1000), a mobile terminal (600), etc.

[0301] For example, when a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, and the external input mode is changed from a sound output device to a game console, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0302] Meanwhile, the signal processing device (170) can control the display (180) to display a second image (1020) based on a second image signal received based on the switching of the external input mode when the external input mode is switched, and can control the audio output unit (185) to output a second sound (Sba) based on a second audio signal received based on the switching of the external input mode.

[0303] Meanwhile, the signal processing device (170) can control the transmission of a mute signal (Smt) to the sound output device (400) when the video display device (100) is in a single sound output mode or when the signal of the audio return channel to the sound output device (400) cannot be transmitted when switching to an external input mode.

[0304] In response to this, the sound output device (400) may stop outputting the sound (Sab) corresponding to the first audio signal. Accordingly, when the video display device (100) outputs sound, the sense of strangeness caused by other sounds from the sound output device (400) can be reduced.

[0305] Referring to FIG. 10c and FIG. 10d, the interface (130) of the video display device (100) can determine whether the HDMI standard with the sound output device (400) is 2.0 or lower or 2.1 or higher.

[0306] Meanwhile, the interface (130) of the video display device (100) is connected to the sound output device (400) via a wired connection through the HDMI interface (130a) when the HDMI standard with the sound output device (400) is 2.0 or lower, and in the first input mode, it can receive a first video signal and a first audio signal from the sound output device (400) through a plurality of Transition Minimized Differential Signaling (TMDS) lanes.

[0307] Next, the interface (130) of the video display device (100) can transmit a third audio signal corresponding to the second audio signal to the sound output device (400) or transmit a mute signal (Smt) through some of the variation-minimizing differential signal lanes or a utility line in the second input mode in which the external input mode is switched. Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the sound output device (400) can be reduced.

[0308] Meanwhile, the interface (130) of the video display device (100) is connected to the sound output device (400) via a wired connection through the HDMI interface (130a) when the HDMI standard with the sound output device (400) is 2.1 or higher, and in the first input mode, can receive a first video signal and a first audio signal from the sound output device (400) through a plurality of fixed rate link (Fixed Rate Link and FRL) lanes.

[0309] Next, the interface (130) of the video display device (100) can transmit a third audio signal corresponding to the second audio signal to the sound output device (400) or transmit a mute signal (Smt) through some of the multiple fixed-rate link lanes or a utility line in the second input mode in which the external input mode is switched. Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the sound output device (400) can be reduced.

[0310] FIGS. 11a to 11d correspond to FIGS. 10a to 10d, but differ in that a set-top box is provided within the sound output device.

[0311] FIG. 11a illustrates a sound output device being wired to a video display device.

[0312] Referring to the drawing, the interface (130) of the image display device (100) receives device information, transmission content information, etc. of the sound output device (400b) through a CEC line, and thereafter, in a first input mode, can receive a first video signal and a first audio signal from the sound output device (400b) through a plurality of Transition Minimized Differential Signaling (TMDS) lanes or a plurality of Fixed Rate Link (FRL) lanes.

[0313] Meanwhile, the signal processing device (170) can control the display (180) to display a first image (1010) based on a first image signal from the sound output device (400b) in the first input mode when the sound output device (400b) is in a simultaneous sound output mode, and can control the audio output unit (185) to output a first sound (Saa) based on a first audio signal from the sound output device (400b).

[0314] Meanwhile, the sound output device (400b) can output a sound (Sab) corresponding to the first audio signal. Accordingly, stable sound can be output in a simultaneous sound output mode.

[0315] FIG. 11b illustrates that at least one of the external devices is wired connected to a sound output device in a state where the sound output device is wired to a video display device related to the present disclosure.

[0316] Referring to the drawing, when an external input mode is changed from a sound output device to a game console while a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0317] In response to this, a second image (1020) corresponding to the second image signal is displayed on the display (180), and the audio output unit (185) can output a second sound (Sba) corresponding to the second audio signal.

[0318] However, the sound output device (400b) can output a sound (Sab) corresponding to the first audio signal input from the set-top box device (300). That is, since the video display device (100) and the sound output device (400b) output sounds of different sources, a sense of incongruity with different sounds occurs.

[0319] FIG. 11c illustrates an example of a wired connection of at least one of the external devices when a sound output device is wired to a video display device according to an embodiment of the present disclosure.

[0320] Referring to the drawing, when an external input mode is changed from a sound output device to a game console while a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0321] The signal processing device (170) can control the display (180) to display a second image (1020) based on the received second image signal when the external input mode is switched, and can control the audio output unit (185) to output a second sound (Sba) based on the received second audio signal.

[0322] Meanwhile, the signal processing device (170) controls the transmission of a mute signal (Smt) to the sound output device (400b) when the external input mode is switched.

[0323] For example, if the interface (130) is capable of transmitting a signal of an audio return channel to a sound output device (400b), it can control the transmission of a mute signal (Smt) to the sound output device (400b) through some of the multiple change-minimizing difference signal lanes or utility lines.

[0324] As another example, if the interface (130) is capable of transmitting a signal of an audio return channel to a sound output device (400b), it can control the transmission of a mute signal (Smt) to the sound output device (400b) through some of the multiple fixed-rate link lanes or utility lines.

[0325] As another example, if the interface (130) is unable to transmit a signal of the audio return channel to the sound output device (400b), it can control the transmission of a mute signal (Smt) to the sound output device (400b) through the CEC line.

[0326] FIG. 11d illustrates another example of a wired connection of at least one of the external devices when a sound output device is wired to a video display device according to an embodiment of the present disclosure.

[0327] Referring to the drawing, the signal processing device (170) can control the display (180) to display a second image (1020) based on a second image signal received based on the switching of the external input mode when the external input mode is switched, and can control the audio output unit (185) to output a second sound (Sba) based on a second audio signal received based on the switching of the external input mode.

[0328] Meanwhile, the signal processing device (170) can control the transmission of a mute signal (Smt) to the sound output device (400b) when the video display device (100) is in a single sound output mode or when the transmission of the audio return channel signal to the sound output device (400b) is not possible when switching to an external input mode.

[0329] To this end, the signal processing device (170) can control the transmission of a first mute signal (Smta) to a remote control device (200) paired via RF signal or Bluetooth.

[0330] Meanwhile, the remote control device (200) can receive a first mute signal (Smta) based on an RF signal and transmit a second mute signal (Smtb) based on an IR signal to a sound output device (400b).

[0331] In response to this, the sound output device (400b) receives a second mute signal (Smtb) based on the IR signal and can stop the output of the sound (Sab) corresponding to the first audio signal. Accordingly, when the video display device (100) outputs sound, the sense of strangeness caused by other sounds from the sound output device (400b) can be reduced.

[0332] FIG. 12 is an example of a method of operation of an image display device according to another embodiment of the present disclosure.

[0333] Referring to the drawings, a signal processing device (170) in a video display device (100) according to another embodiment of the present disclosure determines whether a first video signal and a first audio signal from a set-top box device (300b) are input (S1210), and if applicable, controls the display (180) to display a first video (1010) based on the first video signal from the set-top box device (300b), and controls the audio output unit (185) to output a first sound (Sfa) based on the first audio signal from the set-top box device (300b) (S1215).

[0334] In the case where the interface (130) within the image display device (100) according to another embodiment of the present disclosure is equipped with an HDMI interface (130a), the connection status of the set-top box device (300b) or the power-on status of the connected set-top box device (300b) can be detected through the HPD line.

[0335] And, when the signal processing device (170) in the video display device (100) detects that the set-top device (300b) is connected and the power is turned on, it can switch the external input mode to an input mode based on the set-top device (300b).

[0336] And, the signal processing device (170) within the video display device (100) can determine whether a first video signal and a first audio signal from the set-top box device (300b) are input through the interface (130), and if so, control the output of a first video corresponding to the first video signal and a first sound (Sfa) corresponding to the first audio signal through respective signal processing.

[0337] Next, the signal processing device (170) within the video display device (100) determines whether the external input mode is switched (S1222), and if so, determines whether the video display device (100) and the set-top device (300b) are in a simultaneous sound output mode (S1220). If so, based on the switching of the external input mode, it controls the output of a second video and a second sound based on the switched external source, and controls the transmission of a mute signal (Smt) to the set-top device (300b) or a sound output device (400) connected to the set-top device (300b) (S1230).

[0338] Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the set-top box device (300b) can be reduced. In particular, when the video display device (100) outputs sound independently, stable sound can be output.

[0339] FIGS. 13a to 13c are drawings referenced in the description of FIG. 12.

[0340] FIG. 13a illustrates a set-top box device being wired connected to a video display device.

[0341] Referring to the drawings, an image display device (100) according to another embodiment of the present disclosure includes a display (180), an audio output unit (185) that outputs sound, an interface (130) that receives a signal from an external set-top box device (300b), and a signal processing device (170) that controls the display (180) to display a first image (1010) based on a first image signal from the set-top box device (300b) and controls the audio output unit (185) to output a first sound (Sfa) based on a first audio signal from the set-top box device (300b).

[0342] Meanwhile, the set-top box device (300b) is separately connected to a sound output device (400) and can transmit an audio signal to the sound output device (400).

[0343] Meanwhile, the interface (130) of the video display device (100) can be connected to the set-top box device (300b) via a wire through the HDMI interface (130a).

[0344] For example, when the set-top box device (300b) is powered on, the interface (130) can receive device information, transmission content information, etc. of the set-top box device (300b) through the CEC line.

[0345] The device information at this time may include information indicating that the set-top device (300) is connected to the set-top device (300b).

[0346] Meanwhile, the transmitted content information may include video signal information to be transmitted and audio signal information to be transmitted.

[0347] For example, if the set-top device (300) is connected to the set-top device (300b) and the first video signal and the first audio signal can be transmitted from the set-top device (300) to the set-top device (300b), the set-top device (300b) can transmit device information, transmission content information, etc. of the set-top device (300b) through the CEC line.

[0348] In response to this, the interface (130) of the video display device (100) receives device information, transmission content information, etc. of the set-top device (300b) through a CEC line, and thereafter, in a first input mode, can receive a first video signal and a first audio signal from the set-top device (300b) through a plurality of Transition Minimized Differential Signaling (TMDS) lanes or a plurality of Fixed Rate Link (FRL) lanes.

[0349] Meanwhile, the signal processing device (170) can control the display (180) to display the first image (1010) based on the first image signal from the set-top device (300b) in the first input mode, and control the audio output unit (185) to output the first sound (Sfa) based on the first audio signal from the set-top device (300b).

[0350] Meanwhile, the sound output device (400) connected to the set-top box device (300b) can output a sound (Seb) corresponding to the first audio signal. Accordingly, stable sound can be output in a simultaneous sound output mode.

[0351] FIG. 13b illustrates that at least one of the external devices is wired connected to a set-top box device in a state where the set-top box device is wired connected to a video display device related to the present disclosure.

[0352] Referring to the drawing, when an external input mode is changed from a sound output device to a game console while a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0353] In response to this, a second image (1020) corresponding to the second image signal is displayed on the display (180), and the audio output unit (185) can output a second sound (Sda) corresponding to the second audio signal.

[0354] However, the sound output device (400) wired to the set-top device (300b) can output a sound (Seb) corresponding to the first audio signal input from the set-top device (300). Accordingly, in a simultaneous sound output mode, the video display device (100) and the set-top device (300b) output sounds of different sources, so a sense of incongruity with different sounds occurs.

[0355] FIG. 13c illustrates an example of a wired connection of at least one external device when a set-top box device is wiredly connected to a video display device according to an embodiment of the present disclosure.

[0356] Referring to the drawing, when an external input mode is changed from a sound output device to a game console while a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0357] Meanwhile, the signal processing device (170) controls the display (180) to display the second image (1020) based on the second image signal received based on the switching of the external input mode when the external input mode is switched, controls the audio output unit (185) to output the second sound (Sba) based on the second audio signal received based on the switching of the external input mode, and controls the transmission of a mute signal (Smt) to the set-top device (300b) or the sound output device (400) connected to the set-top device (300b).

[0358] Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the set-top box device (300b) can be reduced. In particular, when the video display device (100) outputs sound independently, stable sound can be output.

[0359] Meanwhile, the interface (130) may include a first HDMI terminal (TTa) and a second HDMI terminal (TTb).

[0360] Meanwhile, the interface (130) can receive a first video signal and a first audio signal from a set-top box device (300b) through the first HDMI terminal (TTa) in the first input mode, and in the second input mode where the external input mode is switched, the second HDMI terminal (TTb) can receive a second video signal and a second audio signal from a connected external device.

[0361] Meanwhile, the interface (130) may include a first HDMI terminal (TTa) that supports an audio return channel and a second HDMI terminal (TTb) that does not support an audio return channel.

[0362] Meanwhile, in the second input mode, the sound output mode with the set-top box device (300b) is simultaneous, and when the signal of the audio return channel to the set-top box device (300b) can be transmitted, the first HDMI terminal (TTa) can transmit a mute signal (Smt) to the set-top box device (300b).

[0363] Accordingly, the sound output device (400) wired to the set-top device (300b) can stop the output of the sound (Seb) corresponding to the first audio signal. Consequently, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the set-top device (300b) can be reduced.

[0364] FIG. 13d illustrates another example of a wired connection of at least one of the external devices when a set-top box device is wired connected to a video display device according to an embodiment of the present disclosure.

[0365] Referring to the drawing, when an external input mode is changed from a sound output device to a game console while a game console (1100), which is an example of an external device, is wired to an interface (130) via a separate HDMI terminal, the interface (130) can receive a second video signal and a second audio signal from the game console (1100) based on the switching of the external input mode.

[0366] Meanwhile, the signal processing device (170) can control the display (180) to display a second image (1020) based on a second image signal received based on the switching of the external input mode when the external input mode is switched, and can control the audio output unit (185) to output a second sound (Sba) based on a second audio signal received based on the switching of the external input mode.

[0367] Meanwhile, the signal processing device (170) can control the transmission of a mute signal (Smt) to a sound output device (400) connected to the set-top device (300b) when the video display device (100) is in a single sound output mode or when signal transmission of the audio return channel to the set-top device (300b) is not possible when switching to an external input mode.

[0368] For example, the interface (130) may include a first HDMI terminal (TTa) that supports an audio return channel and a second HDMI terminal (TTb) that does not support an audio return channel.

[0369] Meanwhile, when an external device is connected to the first HDMI terminal (TTa) and a set-top box device (300b) is connected to the second HDMI terminal (TTb), in the first input mode, the first HDMI terminal (TTa) receives a first video signal and a first audio signal from the set-top box device (300b) through the second HDMI terminal (TTb), and in the second input mode where the external input mode is switched, the first HDMI terminal (TTa) receives a second video signal and a second audio signal from the connected external device, and the second HDMI terminal (TTb) may not transmit a third audio signal or a mute signal (Smt) to the set-top box device (300b).

[0370] Meanwhile, the signal processing device (170) can control the transmission of a mute signal (Smt) to the sound output device (400) when the video display device (100) is in a single sound output mode or when the signal of the audio return channel to the set-top box device (300b) cannot be transmitted when switching to an external input mode.

[0371] To this end, the signal processing device (170) can control the transmission of a first mute signal (Smta) to a remote control device (200) paired via RF signal or Bluetooth.

[0372] Meanwhile, the remote control device (200) can receive a first mute signal (Smta) based on an RF signal and transmit a second mute signal (Smtb) based on an IR signal to a sound output device (400).

[0373] In response to this, the sound output device (400) receives a second mute signal (Smtb) based on the IR signal and can stop the output of the sound (Seb) corresponding to the first audio signal. Accordingly, when the video display device (100) outputs sound, the sense of strangeness caused by other sounds from the sound output device (400b) can be reduced.

[0374] Referring to FIG. 13c and FIG. 13d, the interface (130) of the video display device (100) can determine whether the HDMI standard with the set-top box device (300b) is 2.0 or lower or 2.1 or higher.

[0375] Meanwhile, the interface (130) of the video display device (100) is connected to the set-top device (300b) via a wired connection through the HDMI interface (130a) when the HDMI standard with the set-top device (300b) is 2.0 or lower, and in the first input mode, can receive a first video signal and a first audio signal from the set-top device (300b) through a plurality of Transition Minimized Differential Signaling (TMDS) lanes.

[0376] Next, the interface (130) of the video display device (100) can transmit a mute signal (Smt) to the set-top device (300b) through some of the variation-minimizing differential signal lanes or a utility line in the second input mode in which the external input mode is switched. Accordingly, when the video display device (100) outputs sound, the sense of incongruity caused by other sounds from the set-top device (300b) can be reduced.

[0377] Meanwhile, the interface (130) of the video display device (100) is connected to the set-top device (300b) via a wired connection through the HDMI interface (130a) when the HDMI standard with the set-top device (300b) is 2.1 or higher, and in the first input mode, can receive a first video signal and a first audio signal from the set-top device (300b) through a plurality of fixed rate link (Fixed Rate Link and FRL) lanes.

[0378] Next, the interface (130) of the video display device (100) can transmit a mute signal (Smt) to the set-top device (300b) through some of the multiple fixed-rate link lanes or a utility line in the second input mode in which the external input mode is switched.

[0379] FIGS. 14a to 14d are drawings referenced in the description of FIG. 9 or FIG. 12.

[0380] Fig. 14a is an example of an external input screen.

[0381] Referring to the drawing, the external input screen (1400) may be exemplified by a sound output device item (1412) connected to the HDMI / ARC terminal (TTa), a game console item (1414) connected to the HDMI terminal (TTb), an antenna item (1416), a USB item (1418), etc.

[0382] The signal processing device (170) can control the external input screen (1400) to be displayed based on the input signal, etc.

[0383] In FIGS. 10a to 11d, the external input mode is illustrated as being switched from the sound output device item (1412) to the game console item (1414), but is not limited thereto, and it is also possible to switch from the sound output device item (1412) to the antenna item (1416) or the USB item (1418), etc.

[0384] For example, when switching to the antenna item (1416), broadcast video and broadcast sound corresponding to the broadcast signal can be output, respectively.

[0385] As another example, when switching to a USB item (1418), video and sound corresponding to video and audio signals from a mobile terminal (600) or a storage device (not shown) may be output.

[0386] Fig. 14b is an example of an audio output mode.

[0387] Referring to the drawing, the signal processing device (170) can control the audio output mode screen (1500) to be displayed based on the input signal, etc.

[0388] The signal processing device (170) can control the audio output mode screen (1500) to be displayed when the sound output device (400) is connected via a wire.

[0389] The audio output mode screen (1500) may include a single sound output item (1510) of the video display device, a simultaneous sound output item (1515) of the video display device and the sound output device, and a single sound output item (1520) of the sound output device.

[0390] The signal processing device (170) can control the output of sound in response to a selected item among a plurality of items.

[0391] Fig. 14c is another example of an audio output mode.

[0392] Referring to the drawing, the signal processing device (170) can control the audio output mode screen (1500b) to be displayed based on the input signal, etc.

[0393] The signal processing device (170) can control the audio output mode screen (1500b) to be displayed when the game console (1100) is connected via wire while the sound output device (400) is connected via wire.

[0394] The audio output mode screen (1500b) may include a single sound output item (1510) of the video display device, a simultaneous sound output item (1512) of the video display device and the game console, a single sound output item (1513) of the game console, a simultaneous sound output item (1515) of the video display device and the sound output device, and a simultaneous sound output item (1517) of the video display device, the game console, and the sound output device.

[0395] The signal processing device (170) can control the output of sound in response to a selected item among a plurality of items.

[0396] Fig. 14d is another example of an audio output mode.

[0397] Referring to the drawing, the signal processing device (170) can control the audio output mode screen (1500c) to be displayed based on the input signal, etc.

[0398] The signal processing device (170) can control the audio output mode screen (1500c) to be displayed when the sound output device (400) is wired and then disconnected, or when the power of the sound output device (400) is turned off.

[0399] In particular, the signal processing device (170) can control the simultaneous sound output item (1515b) of the video display device and the sound output device and the single sound output item (1520b) of the sound output device to be disabled among the multiple items in the audio output mode screen (1500c) related to the sound output device. Accordingly, the audio output mode can be intuitively recognized.

[0400] Although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure.

Claims

1. Display; Audio output unit for outputting sound; An interface for receiving a signal from an external sound output device; A signal processing device comprising: a first image being displayed on the display based on a first image signal from the sound output device, and a first sound being output from the audio output unit based on a first audio signal from the sound output device. The above signal processing device is, A video display device that, when an external input mode is switched, controls the display to display a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a third audio signal or a mute signal to the sound output device.

2. In Paragraph 1, The above signal processing device is, A video display device that controls the transmission of the third audio signal corresponding to the second audio signal to the sound output device when switching to the above external input mode, in the case of a simultaneous sound output mode with the sound output device.

3. In Paragraph 1, The above interface is, It is connected to the sound output device via a wired connection through an HDMI interface, and In the first input mode, the first video signal and the first audio signal from the sound output device are received, A video display device that transmits the third audio signal to the sound output device or transmits the mute signal in the second input mode in which the above external input mode is switched.

4. In Paragraph 1, The above interface is, It is connected to the sound output device via a wired connection through an HDMI interface, and In a first input mode, the first video signal and the first audio signal from the sound output device are received through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and A video display device that transmits the third audio signal or the mute signal to the sound output device through some of the plurality of change-minimizing difference signal lanes or utility lines in the second input mode in which the above external input mode is switched.

5. In Paragraph 1, The above interface is, It is connected to the sound output device via a wired connection through an HDMI interface, and In a first input mode, the first video signal and the first audio signal from the sound output device are received through a plurality of fixed rate link (FRL) lanes, and A video display device that transmits the third audio signal to the sound output device or transmits the mute signal through some of the plurality of fixed rate link lanes or a utility line in the second input mode in which the above external input mode is switched.

6. In Paragraph 4 or 5, The above interface is, A video display device that receives information from the sound output device via a CEC line based on the power-on of the sound output device.

7. In Paragraph 1, The above signal processing device is, A video display device that controls the transmission of the mute signal to the sound output device when the video display device is in a standalone sound output mode or when signal transmission of the audio return channel to the sound output device is impossible during the switching of the above external input mode.

8. In Paragraph 1, The above interface is, It includes a first HDMI terminal and a second HDMI terminal, and In the first input mode, the first HDMI terminal receives the first video signal and the first audio signal from the sound output device through the first HDMI terminal, and A video display device in which, in a second input mode in which the above external input mode is switched, the second HDMI terminal receives the second video signal and the second audio signal from a connected external device.

9. In Paragraph 8, A video display device in which, in the second input mode, there is a simultaneous sound output mode with the sound output device, and when signal transmission of an audio return channel to the sound output device is possible, the first HDMI terminal transmits the third audio signal corresponding to the second audio signal to the sound output device.

10. In Paragraph 8, The above signal processing device is, In the above second input mode, when it is a joint sound output mode, control is provided so that sound is output from the video display device, the sound output device, and the external device, respectively. In the above second input mode, when it is the first simultaneous sound output mode, control is provided so that sound is output from the video display device and the external device, respectively. A video display device that controls sound to be output from the video display device and the sound output device, respectively, in the case of a second simultaneous sound output mode in the second input mode.

11. In Paragraph 1, The above interface is, It includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support the audio return channel, When an external device is connected to the first HDMI terminal and the sound output device is connected to the second HDMI terminal, In the first input mode, the first HDMI terminal receives the first video signal and the first audio signal from the sound output device through the second HDMI terminal, and A video display device in which, in a second input mode in which the above external input mode is switched, the first HDMI terminal receives the second video signal and the second audio signal from a connected external device, and the second HDMI terminal does not transmit the third audio signal or the mute signal to the sound output device.

12. Display; Audio output unit for outputting sound; An interface for receiving a signal from an external set-top device; A signal processing device comprising: controlling to display a first image on the display based on a first image signal from the set-top device, and controlling to output a first sound from the audio output unit based on a first audio signal from the set-top device; The above signal processing device is, A video display device that, when an external input mode is switched, controls the display to display a second image based on a second image signal received based on the switching of the external input mode, controls the audio output unit to output a second sound based on a second audio signal received based on the switching of the external input mode, and controls the transmission of a mute signal to the set-top device or a sound output device connected to the set-top device.

13. In Paragraph 12, The above interface is, It is connected to the above set-top device via a wired connection through an HDMI interface, and In the first input mode, the first video signal and the first audio signal from the set-top device are received, A video display device that transmits the mute signal to the set-top box device in the second input mode in which the above external input mode is switched.

14. In Paragraph 12, The above interface is, It is connected to the above set-top device via a wired connection through an HDMI interface, and In a first input mode, the first video signal and the first audio signal from the set-top device are received through a plurality of Transition Minimized Differential Signaling (TMDS) lanes, and A video display device that transmits the mute signal to the set-top box device through some of the plurality of change-minimizing difference signal lanes or a utility line in a second input mode in which the above external input mode is switched.

15. In Paragraph 12, The above interface is, It is connected to the above set-top device via a wired connection through an HDMI interface, and In a first input mode, the first video signal and the first audio signal from the set-top device are received through a plurality of fixed rate link (FRL) lanes, and A video display device that transmits the mute signal to the set-top device through some of the plurality of fixed-rate link lanes or a utility line in a second input mode in which the above external input mode is switched.

16. In Paragraph 14 or 15, The above interface is, A video display device that receives information from the set-top box device via a CEC line based on the power-on of the set-top box device.

17. In Paragraph 12, The above interface is, It includes a first HDMI terminal and a second HDMI terminal, and In the first input mode, the first HDMI terminal receives the first video signal and the first audio signal from the set-top device through the first HDMI terminal, and A video display device in which, in a second input mode in which the above external input mode is switched, the second HDMI terminal receives the second video signal and the second audio signal from a connected external device.

18. In Paragraph 12, The above interface is, It includes a first HDMI terminal that supports an audio return channel and a second HDMI terminal that does not support the audio return channel, When an external device is connected to the first HDMI terminal and the set-top box device is connected to the second HDMI terminal, In the first input mode, the first HDMI terminal receives the first video signal and the first audio signal from the set-top device through the second HDMI terminal, and A video display device in which, in a second input mode in which the above external input mode is switched, the first HDMI terminal receives the second video signal and the second audio signal from a connected external device, and the second HDMI terminal does not transmit the third audio signal or the mute signal to the set-top box device.

Images