Patent Publication Number: US-2023156143-A1

Title: Audio-visual system and method for controlling the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation of U.S. application Ser. No. 17/548,129 filed on Dec. 10, 2021, which is a continuation of U.S. application Ser. No. 17/219,387 filed on Mar. 31, 2021, now U.S. Pat. No. 11,223,793 issued Jan. 11, 2022, which is a continuation of U.S. application Ser. No. 17/107,417 filed on Nov. 30, 2020, now U.S. Pat. No. 11,089,258 issued Aug. 10, 2021, which is a continuation of U.S. application Ser. No. 16/918,793 filed on Jul. 1, 2020, now U.S. Pat. No. 10,880,512 issued Dec. 29, 2020, which is a continuation of U.S. application Ser. No. 16/670,867 filed on Oct. 31, 2019, now U.S. Pat. No. 10,778,935 issued Sep. 15, 2020, which continuation of U.S. application Ser. No. 16/428,501 filed on May 31, 2019, now U.S. Pat. No. 10,506,197 issued Dec. 10, 2019, which is a continuation of U.S. application Ser. No. 16/000,403 filed on Jun. 5, 2018, now U.S. Pat. No. 10,447,962 issued Oct. 15, 2019, which is a continuation of U.S. application Ser. No. 15/278,981 filed on Sep. 28, 2016, now U.S. Pat. No. 10,015,435 issued Jul. 3, 2018, which claims the benefit of U.S. Provisional Application No. 62/269,352, filed on Dec. 18, 2015, in the United States Patent and Trademark Office, and priority from the Korean Patent Application No. 10-2016-0032824, filed on Mar. 18, 2016, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Systems, apparatuses and methods consistent with exemplary embodiments generally relate to an audio-visual system and a method for controlling the same, and more particularly, to an audio-visual system which provides various content output modes and a method for controlling the same. 
     2. Description of the Related Art 
     With the development of electronic technologies, diverse types of electronic devices have been developed and have come into wide use. Specifically, visual devices and audio devices which are widely used in many households, such as, a television (TV), a stereo system, or the like, have been developed continuously in recent years. 
     With the advance of the performance of the visual devices and audio devices, visual content and audio content is output in an optimal state according to the characteristics of the contents. 
     However, in order to set up an optimal image-viewing environment or sound-listening environment, each household needs to be equipped with a visual device and an audio device separately. Further, the conventional visual devices and audio devices have been recognized as only an electronic device irrelevant to a home interior decoration, although the visual devices and audio devices have great importance in the home interior decoration actually. 
     SUMMARY 
     Exemplary embodiments provide an audio-visual system which features output modes optimized for respective content types and functions not as only an electronic device but as furniture for the interior decoration. 
     According to an aspect of an exemplary embodiment, there is provided an audio-visual system. The audio-visual system may include a housing comprising an open upper end and a storage space inside the housing, an audio-visual device configured to be installed inside the housing and exposable through the open upper end of the housing, and a lifting device configured to expose the audio-visual device or store the audio-visual device inside the housing through the open upper end of the housing. The audio-visual device may include a display, a speaker installed on at least one side of the display, and a processor configured to control the audio-visual system to operate in a first mode for outputting media art content while the display is stored in the housing according to a first event, operate in a second mode for outputting audio content through the speaker while a part of the display is exposed to an outside through the open upper end of the housing according to a second event, and operate in a third mode for outputting visual content while the entire display is exposed to the outside through the open upper end of the housing according to a third event. 
     The lifting device may include a lifting unit installed on a lower part of the display so as to make the display protrude from the open upper end of the housing and a driving unit configured to drive the lifting unit. The processor may be configured to, in response to a mode being determined according to an event, control a driving status of the driving unit such that the display protrudes from or is stored in the housing in a state corresponding to the determined mode. 
     The processor may be configured to, in response to a mode being determined according to an event, perform local dimming to at least a part of a screen area of the display based on a size of content output in the determined mode. In addition, the processor may further include a source device and a communication unit. The processor may be configured to, in response to a mode being determined according to an event, control the communication unit to automatically communicate with the source device providing content which is outputtable in the determined mode. 
     The processor may be configured to, in response to a mode being determined according to an event, activate at least one speaker corresponding to sound output in the determined mode and perform equalization for the sound. 
     The processor may provide a user interface (UI) where information related to the audio content is reconstructed based on a size of the part of the display exposed in the second mode, through the exposed part of the display. 
     The first event may be an event where the media art content is selected, the second event may be an event where the audio content is selected, and the third event may be an event where the visual content is selected. 
     The housing may include a front surface where a plurality of holes are formed with a predetermined distance therebetween. 
     The audio-visual device may further include a sensor configured to sense an accessory attached by means of the plurality of holes. The processor may control the display to display the media art content in a display area corresponding to a position where the accessory is not attached, based on a sensing result of the sensor, in the first mode. 
     According to an aspect of another embodiment, there is provided a method for controlling an audio-visual system including a housing comprising an open upper end and a storage space inside the housing, an audio-visual device configured to be installed inside the housing and exposable through the open upper end of the housing, and a lifting device configured to expose the audio-visual device or store the audio-visual device inside the housing through the open upper end of the housing. The method includes determining a type of an occurred event of the audio-visual device and operating the audio-visual system in a first mode for outputting media art content while a display of the audio-visual device is stored in the housing in response to the occurred event being a first event, operating the audio-visual system in a second mode for outputting audio content through a speaker of the audio-visual device while a part of the display is exposed to an outside through the open upper end of the housing in response to the occurred event being a second event, and operating the audio-visual system in a third mode for outputting visual content while the entire display is exposed to the outside through the open upper end of the housing in response to the occurred event being a third event. 
     The lifting device may include a lifting unit installed on a lower part of the display so as to make the display protrude from the open upper end of the housing and a driving unit configured to drive the lifting unit. In response to a mode being determined according to an event, controlling a driving status of the driving unit such that the display protrudes from or is stored in the housing in a state corresponding to the determined mode. 
     In response to a mode being determined according to an event, the method may further include performing local dimming to at least a part of a screen area of the display based on a size of content output in the determined mode. 
     In response to a mode being determined according to an event, the method may further include automatically communicating with a source device providing a content which is outputtable in the determined mode. 
     In response to a mode being determined according to an event, the method may further include activating at least one speaker corresponding to sound output in the determined mode and performing equalization for the sound. 
     The method may further include providing a UI where information related to the audio content is reconstructed based on a size of the part of the display exposed in the second mode, through the exposed part of the display. 
     The first event may be an event where the media art content is selected, the second event may be an event where the audio content is selected, and the third event may be an event where the visual content is selected. 
     The housing may include a front surface where a plurality of holes are formed with a predetermined distance therebetween. 
     The method may further include sensing an accessory attached by means of the plurality of holes and displaying the media art content in a display area corresponding to a position where the accessory is not attached, based on a sensing result, in the first mode. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and/or other aspects will be more apparent by describing certain exemplary embodiments with reference to the accompanying drawings, in which: 
         FIGS.  1 A and  1 B  are diagrams illustrating implementation examples of an audio-visual system, according to an exemplary embodiment; 
         FIG.  2 A  is a diagram illustrating a structure of an audio-visual device, according to an exemplary embodiment; 
         FIG.  2 B  is a diagram illustrating a structure of a lifting device, according to an exemplary embodiment; 
         FIG.  3    is a block diagram illustrating a detailed structure of the audio-visual device of  FIG.  2   ; 
         FIG.  4    is a diagram provided to describe an operating method in a first mode, according to an exemplary embodiment; 
         FIG.  5    is a diagram provided to describe an operating method in a second mode, according to an exemplary embodiment; 
         FIGS.  6 A to  6 C  are diagrams provided to describe installation positions of a speaker, according to an exemplary embodiment; 
         FIGS.  7 A and  7 B  are diagrams provided to describe an operating method in a third mode, according to an exemplary embodiment; 
         FIG.  8    is a diagram provided to describe a furniture function, according to an exemplary embodiment; and 
         FIG.  9    is a flowchart provided to describe a method for controlling an audio-visual system, according to an exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Certain exemplary embodiments are described below in greater detail with reference to the accompanying drawings. 
     In the following description, like drawing reference numerals are used for the like elements, even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding of the exemplary embodiments described herein. However, other exemplary embodiments can be practiced without those specifically defined matters. Also, well-known functions or constructions are not described in detail since they would obscure the application with unnecessary detail. 
       FIGS.  1 A and  1 B  are diagrams illustrating implementation examples of an audio-visual system, according to an exemplary embodiment. 
     Referring to  FIG.  1 A , an audio-visual system  1000  may include an audio-visual device  100 , a housing  10 , and a lifting device (not shown). 
     The audio-visual device  100  may be configured to provide functions of a visual device for displaying images and an audio device for outputting and recording sounds. For example, the audio-visual device  100  may be used as a visual device, such as, a TV, a monitor, and the like, or may be used as an audio device for reproducing, outputting, or recording diverse formats of sound sources. In this case, a display of the audio-visual device  100  may be formed as a flat panel in a rough rectangular shape, like a common Liquid Crystal Display (LCD) TV or Organic Light-Emitting Diode (OLED) TV. Further, the display of the audio-visual device  100  may be formed as a curved-surface panel with certain curvature. The following exemplary embodiments will be described with the assumption that a display  110  is formed in a flat panel shape. 
     The housing  10  includes an internal space for storing the audio-visual device  100  and an opening  11  on an upper end. Accordingly, the housing  10  is formed to correspond to a shape of the audio-visual device  100 . As illustrated in  FIG.  1 B , the audio-visual device  100  may selectively protrude from an upper side of the housing  10  through the opening  11  formed on the upper end of the housing  10 . The housing  10  may be realized such that the audio-visual system  1000  including the audio-visual device  100  functions as furniture for storage and interior decoration. Accordingly, an external surface of the housing  10  may be designed so as to allow various decorations and storage. 
     To be specific, a couple of support stands  13  for supporting the housing  10  with respect to a floor surface are provided on both lateral surfaces of the housing  10 . The couple of support stands  13  are installed such that a bottom surface of the housing  10  is spaced apart from the floor surface. In this case, the floor surface may include a floor of a place where the housing  10  is installed, for example, a room, a living room, a bed room, an office, a public space, or the like. 
     A plurality of holes  15   a  are formed on a front surface  15  of the housing  10 . The plurality of holes  15   a  are formed to fix accessories  31 ,  32 ,  33 ,  34 . The accessories  31 ,  32 ,  33 ,  34  are fixed by means of the plurality of holes  15   a  on the front surface  15  of the housing  10  so as to support objects, for example, a book, with respect to the housing  10 . By way of example, as illustrated in  FIG.  1 B , the accessory  31  may be formed in a flat-panel shape to be fixed by using one or more of the plurality of holes  15   a . The accessories  32 ,  33  may be formed in a rod shape to be fixed to one or more of the plurality of holes  15   a  through its one end. The accessory  34  may be formed in a rough bracket shape to be fixed to one or more of the plurality of holes  15   a  through its both ends. An accessory may be formed in a rough ‘L’ shape to be fixed to one or more of the plurality of holes  15   a  through its one end. The accessories  31 ,  32 ,  33 ,  34  in  FIG.  1 B  are only examples for illustrative purpose, and the shape of the accessory is not limited thereto. 
     In the same manner as on the front surface  15  of the housing  10 , a plurality of holes may additionally or alternatively be formed on a rear surface  16  of the housing  10 , and various accessories may be fixed to the plurality of holes on the rear surface  16  of the housing  10 . 
     Meanwhile, at least one speaker for outputting sound of a content reproduced in the audio-visual device  100  may be installed around the bottom surface in the housing  10 . As an example, two speakers may be installed inside the housing  10  separately from the audio-visual device  100 . The sounds output from the two speakers may be transmitted to an outside through the plurality of holes  15   a  on the front surface  15  of the housing  10  and/or the plurality of holes on the rear surface  16  of the housing  10 . In this case, the housing  10  may expand a volume of a sound box of the speakers, thereby improving sound quality. Further, an opening corresponding to the speaker(s) on the front surface  15  of the housing  10  may be formed such that a front surface of the speaker(s) is exposed to the outside. The at least one speaker may additionally or alternatively be installed outside the housing  10 . 
     As described above, it is able to achieve an effect of using a speaker larger than an embedded speaker of the audio-visual device  100  by installing at least one speaker separately from the audio-visual device  100 . Accordingly, the audio-visual device  100  may provide good sound quality when used as the audio device. Needless to say, a speaker may be also embedded in the audio-visual device  100 . 
     A lifting device ( FIG.  2 B,  200   ) is configured to expose the audio-visual device  100  or store the audio-visual device  100  inside the housing  10  through the upper end of the housing  10 . 
     The lifting device ( 200 ) is installed on a lower part of the audio-visual device  100  in the housing  10  and may be realized as a lifting unit ( 210 ) for vertically moving the audio-visual device  100  with respect to the housing  10 . That is, the lifting device ( 200 ) makes the audio-visual device  100  protrude outside the housing  10  through the opening  11  on the upper end of the housing  10  such that the display  110  is exposed and also makes the protruded audio-visual device  100  descend so as to be stored in the housing  10 . As the audio-visual device  100  is stored in the housing  10 , the display  110  of the audio-visual device  100  is protected by the housing  10 . 
     The lifting device ( 200 ) may be configured to locate the audio-visual device  100  at at least two different heights. For example, the lifting device ( 200 ) may be configured to move the audio-visual device  100  between a first position where the audio-visual device  100  is entirely stored in the housing  10  so as not to be exposed to the outside of the housing  10  and a second position where at least a part of the audio-visual device  100  is exposed to the outside of the housing  10 . In this case, the second position may include a position where the display  110  of the audio-visual device  100  is entirely exposed to the outside and/or a position where only a part of the display  110  of the audio-visual device  100  is exposed to the outside. 
     For doing this, the lifting device ( 200 ) may include a lifting unit ( 210 ) configured to be installed on a lower part of the display  110  of the audio-visual device  100  to make the display  110  protrude through the upper end of the housing  10  and a driving unit ( 220 ) configured to drive the lifting unit ( 210 ). In this case, the driving unit ( 220 ) may be configured to drive the lifting unit ( 210 ) by rotation of a motor. For example, the number of rotations of the motor may be adjusted to correspond to the height of the audio-visual device  100 . 
       FIG.  2 A  is a diagram illustrating a structure of an audio-visual device, according to an exemplary embodiment. 
     Referring to  FIG.  2 A , an audio-visual device  100  includes the display  110 , a speaker  120 , and a processor  130 . 
     The audio-visual device  100  may be realized as a smart TV, a monitor, or the like, but not limited thereto. The audio-visual device  100  may be realized as various types of devices providing a display function, for example, a Large Format Display (LFD), a digital signage, a Digital Information Display (DID), a video wall, a projector display, and so on. 
     The display  110  may display diverse content screens that may be provided through the audio-visual device  100 . In this case, the content screens may include various contents including images, moving images, text, music, or the like, an application execution screen including various contents, a Graphic User Interface (GUI) screen, and so on. 
     The display  110  may be realized as diverse types of displays, such as, LCD, OLED, Liquid Crystal on Silicon (LCoS), Digital Light Processing (DLP), or the like. Further, the display  110  may be realized as a transparent display with transparent materials to display information. In some cases, the display  110  may be realized as a touch screen that forms a mutual layer structure with a touch pad. The display  110  may be used as a User Interface (UI), as well as an output device, in this case. 
     The at least one speaker  120  is installed on at least one side of the display  110 . The speaker  120  converts electric pulses into sound waves. The speaker  120  may be realized as a dynamic type classified by principles and methods for converting electronic signals into sound waves, but not limited thereto. That is, the speaker  120  may be realized as an electrostatic type, a dielectric type, a magneto striction type, or the like. Further, the speaker  120  may be realized as a multi-way type that divides a register of a frequency band into a low register, a middle register, and a high register and assigns each register to a proper speaker. 
     The processor  130  may control overall operations of the audio-visual system  1000  including the audio-visual device  100 . The processor  130  may include one or more components from among a Central Processing Unit (CPU), a controller, an Application Processor (AP), a Communication Processor (CP), and an ARM processor. 
     The processor  130  may control the audio-visual system  1000  to operate in a first mode for outputting a media art content while the display  110  is stored in the housing  10  in response to a first event, operate in a second mode for outputting an audio content through the speaker  120  while a part of the display  110  is exposed to the outside through the upper end of the housing  10  in response a second event, and operate in a third mode for outputting a visual content while the entire display  110  is exposed to the outside through the upper end of the housing  10  in response a third event. 
     In response to a mode being determined according to an event, the processor  130  may control the operation of the lifting device ( 200 ) such that the display  110  is exposed or is stored in a state corresponding to the determined mode. For example, when the lifting device ( 200 ) includes the lifting unit ( 210 ) being installed on the lower part of the display  110  of the audio-visual device  100  so as to make the display  110  project through the upper end of the housing  10  and the driving unit ( 220 ) for driving the lifting unit ( 210 ) by means of the motor, the processor  130  may control the driving unit ( 220 ) of the lifting device ( 200 ) such that the number of rotations of the motor is adjusted according to the determined mode. 
     The first to third events for executing the first to third modes may be the events where each mode is selected by a user command. As an example, the events may include an event where a mode is selected by a remote control device including a remote controller, an event where a mode is selected by a user gesture or user voice command, an event where a mode is selected by a button on the audio-visual device  100 , and so on. As another example, a plurality of selection switches  22  for selecting a projecting state of the audio-visual device  100  may be provided on an upper bezel area of the audio-visual device  100 . The plurality of selection switches correspond to each of a plurality of heights where the audio-visual device  100  may be located, respectively. Accordingly, in response to one of the plurality of selection switches being pressed, the processor  130  locates the audio-visual device  100  at a height corresponding to the pressed selection switch, and then a mode corresponding to the height is executed automatically. 
     The events are not limited to the above-described examples, and the events may further include an event where a certain type of content is selected, an event where a predetermined time arrives, an event where an exposure degree of the audio-visual device  100  is adjusted manually, an event where a user is recognized, and the like. As an example, the processor  130  may control the audio-visual system  1000  to automatically operate in the first mode in response to receiving a command for selecting a media art content, automatically operate in the second mode in response to receiving a command for selecting an audio content, and automatically operate in the third mode in response to receiving a command for selecting a visual content. As another example, when the audio-visual device  100  is realized as a large display device, such as, the LFD or DID, the audio-visual system  1000  may operate in the first mode or in the second mode while a user is not recognized in front of the audio-visual device  100  and operate in the third mode for displaying a content, such as, an advertisement or the like, when a user is recognized in front of the audio-visual device  100 . As still another example, the audio-visual system  1000  may operate in the first mode for displaying the media art content providing appropriate illumination for sleeping during a predetermined time (for example, a bedtime from 12:00 a.m. to 7:00 a.m.). 
     Meanwhile, according to an exemplary embodiment, a user terminal device, such as, a mobile phone, may be used as the remote control device. As an example, the mobile phone may be triggered to provide a remote control function with respect to the audio-visual system  1000  through a contact or Near Field Communication (NFC) with respect to the audio-visual system  1000 . As another example, the mobile phone may be automatically triggered to provide the remote control function with respect to the audio-visual system  1000  based on at least one of a user location, a time, and content use information. As still another example, in response to the mode being converted, the mobile phone may be automatically changed such that a button that may be used on the mobile phone (for example, a touch button) corresponds to the converted mode. 
     In response to the mode being determined (or executed) according to an event, the processor  130  may automatically communicate with a source device providing content that is outputtable in the determined mode. For example, the processor  130  may automatically communicate with a source device providing a media art content in the first mode, automatically communicate with a source device providing an audio content in the second mode, and automatically communicate with a source device providing a visual content in the third mode. In this case, the communication connection may refer to all kinds of communication able states, for example, communication initiation, network formation, or device pairing between the audio-visual device  100  and a source device. As an example, device identification information on the audio-visual device  100  may be transmitted to the source device, and then pairing between the audio-visual device  100  and the source device may be performed. As another example, in response to a predetermined event occurring in the audio-visual device  100 , a peripheral may be searched through a Digital Living Network Alliance (DLNA) method, and then the pairing may be performed such that the peripheral operates with a source device corresponding to the determined mode. 
     In this case, the processor  130  may display a list of contents that may be provided by the connected source device. For example, in response to a set-top box being connected as the third mode is selected, the processor  130  may display an Electronic Program Guide (EPG) list. In response to the mobile phone (or external server) being connected as the second mode is selected, the processor  130  may receive and display a list of audio contents that may be provided by the mobile phone (or external server). In response to a pre-stored contents being provided, the processor  130  may automatically display a list of the pre-stored contents corresponding to each mode, needless to say. 
     In response to the mode being determined according to an event, the processor  130  may perform local dimming to at least a part of a screen area of the display  110  based on an image size of a content output in the determined mode. For example, in response to information on an audio content reproduced in the second mode being provided to only a part of a screen area exposed to the outside of the housing  10 , the processor  130  may perform the local dimming to the other screen area than the exposed screen area, that is, a screen area located inside the housing  10 , thereby reducing power consumption. 
     In response to the mode being determined according to an event, the processor  130  may control the mode to be converted to an optimal output mode where the user is able to view or listen to a content based on properties of the content provided in the determined mode. 
     As an example, in response to the mode being determined according to an event, the processor  130  may activate at least one speaker to correspond to the audio content output in the determined mode and automatically adjust a sound output volume to correspond to the determined mode. For example, an appropriate speaker and sound output volume may have been set for each mode. 
     As another example, in response to the mode being determined according to an event, the processor  130  may automatically perform sound equalizing corresponding to the sound output in the determined mode. For instance, in response to the audio content being reproduced in the second mode, the processor  130  may automatically perform the sound equalizing corresponding to a genre of the audio content (for example, a rock genre). 
     As another example, in response to the mode being determined according to an event, the processor  130  may adjust output brightness of a pixel based on the properties of the determined mode. That is, the processor  130  may decrease the pixel brightness in the first and second modes and increase the pixel brightness in the third mode. Alternatively, the processor  130  may convert the output mode to a low-power mode where the pixel brightness is decreased automatically, in the first and second modes. 
     The processor  130  may change a display position or brightness of a content according to a user command in each mode. For example, the processor  130  may change the display position of a media art content in the first mode according to a user gesture command or change the brightness of the media art content to change ambient illuminance. 
     The processor  130  may provide a predetermined feedback in response to mode conversation. For example, the processor  130  may provide at least one of a visual feedback providing a predetermined image and an auditory feedback providing a predetermined sound. In this case, the processor  130  may provide different types of feedbacks related to the characteristics of a converted mode. For example, the processor  130  may provide the visual feedback in response to the mode being converted from a certain mode to the first mode and provide the auditory feedback in response to the mode being converted from a certain mode to the second mode. 
     In the first mode, the processor  130  may automatically communicate with an external source (for example, an external electronic device, an external server, or the like) providing the media art content to receive the media art content or display the media art content pre-stored in the audio-visual device  100  on the screen of the display  110 . In this case, the operation of receiving and displaying the media art content from the external source may include an operation of downloading content from the external source and reproducing the content by the processor  130  and an operation of receiving content reproduced in the external source (for example, a mobile phone) in a streaming manner and displaying the content. In this case, in response to a resolution of the media art content downloaded or received from the external source in the streaming manner being different from a resolution of the display  110 , the processor  130  may convert a format of the content to an appropriate resolution and then display the content. 
     In this case, the media art content may be content selected by the user when the mode is selected or may be content set by default to be automatically provided when the mode is selected. As an example, in response to a predetermined bedtime arriving, the processor  130  may execute the first mode automatically and display the media art content for helping with the user&#39;s sleep in order to use the media art content as a sleeping light. 
     In addition, the media art content may be content including at least one of a video and an audio. According to the setting in the first mode, only a part of the content may be provided. For example, although the media art content is content including both the video and the audio, the processor  130  may reproduce only the video, except for the audio, through demultiplexing according to the setting in the first mode. 
     The media art content received from the external source, such as, the user terminal device, may be content edited through an editor UI provided by the user terminal device. As an example, the user is able to edit and generate media art content providing a pattern for helping with the sleeping through the editor UI. In this case, the processor  130  may transmit the information on the audio-visual device  100  (for example, the resolution or the like) to the user terminal device, and the user terminal device may provide the editor UI based on the received information. By way of example, an application for controlling the audio-visual device  100  providing three kinds of modes according to the present exemplary embodiment may be installed in the user terminal device, and the user terminal device may control the modes of the audio-visual device  100  through the application. 
     The processor  130  may change a display range automatically according to an attachment state of the accessory  31 ,  32 ,  33 ,  34  on the front surface  15  of the housing  10 . To be specific, the processor  130  may sense the attachment state of the accessory  31 ,  32 ,  33 ,  34  by means of a proximity sensor or the like and display the media art content in a screen area that is not blocked by the accessory  31 ,  32 ,  33 ,  34 , based on the sensing result. 
     As described above, in response to the media art content being output while the audio-visual device  100  is entirely stored in the housing  10 , the light emitted through the plurality of holes  15   a  on the front surface  15  of the housing  10  may be utilized as a media object or illumination. 
     According to circumstances, the processor  130  may display the media art content by exposing a part of the display  110  to the outside of the housing  10  in the first mode in order to provide the illumination function. In this case, the processor  130  may display a single content on the entire screen or display a content only in the exposed area. Further, the processor  130  may display different contents in the exposed display area and an unexposed area. 
     The processor  130  may automatically communicate with an external source providing an audio content (for example, an external electronic device, an external server, or the like) in the second mode to receive the audio content (for example, an audio file with a file extension, such as, MP3, WMA, OGG, WAV, or the like) or may reproduce the audio content pre-stored in the audio-visual device  100 . In this case, the operation of receiving and reproducing the audio content from the external source may include an operation of downloading the audio content from the external source and reproducing the audio content by the processor  130  and an operation of receiving the audio content reproduced in the external source (for example, a mobile phone) in the steaming manner and outputting the audio content. 
     In this case, the processor  130  may reconstruct and display information on the reproduced audio content (for example, information on albums, singers, lyrics, genres, titles, tracks, and so on) to correspond to the exposed display area. As an example, the processor  130  may convert the information to a UI with a certain ratio corresponding to the exposed display area (for example, 80 mm with respect to a 32-inch display area). As another example, the processor  130  may display a UI where a bit equalizer and a reproduction progress bar are shown in an overlapping manner, in the corresponding area. 
     In this case, a UI corresponding to the audio content received from the external source, such as, the user terminal device, may be a UI edited through the editor UI provided by the user terminal device. For example, the user terminal device may provide a UI for editing the information on the audio content (for example, Info Dashboard) through the above-described certain application, and the information edited through the application may be transmitted to the audio-visual device  100 . Further, in response to predetermined information on the audio content (for example, albums, singers, or the like) automatically being transmitted to the audio-visual device  100 , the processor  130  may reconstruct the received information to be an appropriate form of UI and display the UI in the exposed display area. 
     According to circumstances, in the second mode, the processor  130  may split the screen area and provide different contents in each screen area. For instance, the processor  130  may provide a UI corresponding to the audio content to a first screen area exposed to the outside and provide the media art content to a second screen area unexposed to the outside. In this case, the processor  130  may control the brightness of the first and second screen areas individually to adjust the brightness of each screen area differently. The brightness of each screen area may be controlled individually according to the user command. 
     In response to the second mode being executed, the processor  130  may automatically perform the sound equalization corresponding to the genre of the output audio content. By way of example, the processor  130  may perform corresponding sound equalization according to whether the genre of the output audio content is classical music, rock music, hip-hop music, electronica, or ballad. Further, the processor  130  may automatically adjust the output volume to correspond to the genre of the output audio content. 
     In the third mode, the processor  130  may automatically communicate with an external source (for example, a set-top box or the like) providing a visual content to receive a visual content (for example, a video file with a file extension, such as, MPEG, MPG, MP4, AVI, MOV, MKV, or the like) or reproduce a video content pre-stored in the audio-visual device  100 . In this case, the operation of receiving and reproducing the visual content from the external source may include an operation of downloading the visual content from the external source and reproducing the visual content by the processor  130  and an operation of receiving the visual content reproduced in the external source (for example, a mobile phone) in the steaming manner and outputting the visual content. 
     In response to receiving the visual content from the external source, the processor  130  may transmit information regarding the resolution of the visual content that is processible in the audio-visual device  100 , the performance of a decoder installed in the audio-visual device  100 , a codec type, or the like to the external source and receive a visual content whose format has been converted to correspond to the information from the external source. Further, the processor  130  may convert a format of the visual content received from the external source to a format that is outputtable in the audio-visual device  100  and then display the visual content. 
     The processor  130  may control a screen area in an appropriate size to be exposed to the outside of the housing  10  according to a ratio of the visual content to be output in the third mode (for example, ratios of 16:9, 21:9, 4:3, 1:1, or the like). That is, in the third mode, the processor  130  may control the entire screen of the display  110  to be exposed to the outside of the housing  10  by default or may control only a part of the screen to be exposed to the outside of the housing  10  according to circumstances. 
     In this case, the processor  130  may adjust the size of the screen area exposed to the outside of the housing  10  so as not to show a black screen area (or a content non-display area, for example, upper and lower black bar areas in a 21:9-ratio screen) determined by the ratio of the visual content to be output. 
       FIG.  3    is a block diagram illustrating a detailed structure of the audio-visual device  100  of  FIG.  2 A . 
     Referring to  FIG.  3   , the audio-visual device  100  includes the display  110 , the speaker  120 , the processor  130 , a communication unit  140 , an Input/Output (I/O) unit  150 , a storage  160 , a microphone  171 , a camera  172 , an optical receiver  173 , and a power supply unit  180 . Some of the components of  FIG.  3    overlap the components of  FIG.  2 A , and thus, a repeated description thereof will be omitted. 
     The processor  130  may include a CPU  131 , a Read-Only Memory (ROM)  132  (or a non-volatile memory) storing a control program for controlling the audio-visual system  1000  including the audio-visual device  100 , and a Random Access Memory (RAM)  133  (or a volatile memory) for storing data inputted from the external source or being used as a storage area corresponding to various operations of the audio-visual device  100 . 
     The processor  130  controls overall operations of the audio-visual system  1000  including the audio-visual device  100 , controls a signal flow of the components  110 - 173  of the audio-visual device  100 , and processes data. According to circumstances, a first processor for controlling the audio-visual device  100  and a second processor for controlling the lifting device( 200 ) may be provided separately. In this case, the second processor may include a motor controller for controlling the driving status of the driving unit ( 220 ) in response to a control signal for the lifting device ( 200 ) being received from the first processor. For convenience in explanation, it is assumed that the motor controller is realized as a single body with the processor  130 . 
     The processor  130  controls power supplied to the components  110 - 173  by the power supply unit  180 . Further, in response to a predetermined event occurring, the processor  130  may execute an Operating System (O/S) and diverse applications stored in the storage  160 . 
     The processor  130  may include a Graphic Processing Unit (GPU) for processing graphics corresponding to images. The processor  130  may be realized as a System On Chip (SoC) including a core and a GPU. Further, the processor  130  may include a single-core, a dual-core, a triple-core, a quad-core, or any number of cores in multiples thereof. 
     The CPU  131  accesses the storage  160  and performs a boot-up operation by using the O/S stored in the storage  160 . Then, the CPU  131  performs various operations by using diverse programs, contents, and data in the storage  160 . 
     The ROM  132  stores a set of commands for system booting. In response to the power being supplied by a turn-on command, the CPU  131  copies the O/S in the storage  160  to the RAM  133  according to the commands stored in the ROM  132 , and boots up the system by executing the O/S. Upon completion of the boot-up operation, the CPU  131  copies various application programs in the storage  160  to the RAM  133  and executes the programs copied to the RAM  133  to perform various operations. The CPU  131 , the ROM  132 , and the RAM  133  may be interconnected through an internal bus. 
     The audio-visual device  100  may be connected to an external device in a wired and/or wireless manner by using the communication unit  140  or the I/O unit  150 . The external device may include a mobile phone, a smart phone, a tablet, a Personal Computer (PC), a server, or the like. 
     The communication unit  140  may connect the audio-visual device  100  with the external device by the control of the processor  130 . The processor  130  may download content from the external source or receive content from the external source in the streaming manner through the communication unit  140 . Specifically, in response to the mode being determined according to an event, the processor  130  may control the communication unit  140  to automatically communicate with the source device providing content which is outputtable in the determined mode. 
     The communication unit  140  may include at least one of a wired Ethernet  141 , a wireless Local Area Network (LAN) communicator  142 , and a Bluetooth communicator  143 , according to the performance and structure of the audio-visual device  100 . 
     The I/O unit  150  receives various contents from the external source by the control of the processor  130 . The contents may include at least one of videos, images, text, and sounds, for example. The I/O unit  150  may include at least one of a High Definition Multimedia Interface (HDMI) input port  151 , a component input jack  152 , a PC input port  153 , and a Universal Serial Bus (USB) input jack  154 . 
     The storage  160  may store various data, programs, or applications for driving and/or controlling the audio-visual device  100 . 
     The storage  160  may store a control program for controlling the audio-visual device  100  and the processor  130 , applications initially provided by a manufacturer or downloaded from an external source, GUIs related to the applications, objects for providing the GUIs (for example, images, text, icons, buttons, or the like), user information, documents, databases, related data, and so on. 
     The storage  160  may include a broadcasting receiving module, a channel control module, a volume control module, a communication control module, a voice recognition module, a motion recognition module, an optical receiving module, a display control module, an audio control module, an external input control module, a power control module, a voice database (DB), or a motion database (DB). The processor  130  may execute the functions of the audio-visual device  100  by using software stored in the storage  160 . 
     The storage  160  may include a memory card mounted in the audio-visual device  100  (for example, a micro Secure Digital (SD) card, a USB memory, or the like), an external memory connectable to the USB input jack  154  of the I/O unit  150  (for example, a USB memory or the like), a non-volatile memory, a volatile memory, a Hard Disk Drive (HDD), or a Solid State Drive (SSD). 
     The microphone  171  receives and converts a user voice or other sounds to audio data. The camera  172  captures a still image or a moving image according to the user control. The processor  130  may use the user voice inputted through the microphone  171  during a call process or convert the user voice to the audio data and store the converted audio data in the storage  160 . When the audio-visual device  100  includes the microphone  171  and the camera  172 , the processor  130  may perform various control operations, for example, an operation of selecting one of the first to third modes, in response to the user voice inputted through the microphone  171  or a user motion recognized through the camera  172 . 
     The optical receiver  173  receives an optical signal (including control information) output from the remote control device through an optical window. 
     The optical receiver  173  may receive the optical signal corresponding to a user input (for example, touch, pressing, touch gesture, voice, or motion) from the remote control device. In this case, the control information extracted from the received optical signal may be transmitted to the processor  130 . 
     The power supply unit  180  supplies power received from an external power source to the components  110 - 180  in the audio-visual device  100  by the control of the processor  130 . 
     A tuner  105  may tune and select only a frequency of a desired channel to be received in the audio-visual device  100  from among many radio wave elements of broadcasting signals received in a wired and/or wireless manner, through amplification, mixing, resonance, or the like. For example, the tuner  105  may tune and provide a broadcasting channel according to a user selection in the third mode. 
     On top of the above-described components, the audio-visual device  100  may further include any number of sensors ( 190 ), such as, a sensor for sensing an accessory attached to the front surface  15  of the housing  10  and its attached position, a sensor for sensing the outside exposure degree of the display  110 . 
       FIG.  4    is a diagram provided to describe an operating method in a first mode, according to an exemplary embodiment. 
     As illustrated in  FIG.  4   , in response to the first mode being executed according to a first event, media art content may be output while the display  110  is stored in the housing  10 . For example, in response to a heart-shaped content being output as illustrated in  FIG.  4   , the heart shape  410  is shown through the plurality of holes  15   a  on the front surface  15  of the housing  10 , and thus, the media art effect. In this case, the first event may be various kinds of events, for example, an event where a user selects the first mode, an event where a predetermined time arrives (for example, 10:00 p.m.), an event where no user input is received over a predetermined time in the third mode, and so on. 
       FIG.  5    is a diagram provided to describe an operating method in a second mode, according to an exemplary embodiment. 
     As illustrated in  FIG.  5   , in response to the second mode being executed according to a second event, the audio content may be output through the speaker  120  while a part of the display  110  is exposed to the outside through the upper end of the housing  10 . In this case, an exposed display area  510  may display a UI including the information on the output audio content (for example, information on albums, singers, lyrics, genres, titles, tracks, or the like). 
       FIGS.  6 A to  6 C  are diagrams provided to describe installation positions of a speaker, according to an embodiment. 
     According to an exemplary embodiment, at least one speaker may be installed at various positions as illustrated in  FIGS.  6 A to  6 C . 
     As an example, as illustrated in  FIG.  6 A , at least one speaker for outputting the sound of content reproduced in the audio-visual device  100  may be installed around an upper part  610  of the audio-visual device  100 . 
     As another example, as illustrated in  FIG.  6 B , at least one speaker for outputting the sound of the content reproduced in the audio-visual device  100  may be installed around the bottom surface in the housing  10 . 
     As still another example, as illustrated in  FIG.  6 C , two speakers may be installed on a left side  631  and on a right side  632  inside the housing  10 , separately from the audio-visual device  100 . 
     An opening corresponding to the at least one speaker may be formed on the front surface  15  of the housing  10  such that a front surface of the speaker is exposed to the outside. Further, the at least one speaker may be installed outside the housing  10 . 
     Meanwhile, in the above-described exemplary embodiments, the speakers are installed at different positions according to respective embodiments, but not limited thereto. The speakers may be installed according to a combination of at least two exemplary embodiments. 
       FIGS.  7 A and  7 B  are diagrams provided to describe an operating method in a third mode, according to an exemplary embodiment. 
     In response to the third mode being executed according to a third event, the visual content may be output while the entire display  110  is exposed to the outside through the upper end of the housing  10 , as illustrated in  FIG.  7 A . In this case, the visual content may refer to a content including both video and audio. 
     According to another exemplary embodiment, a part of the screen may be not exposed to the outside of the housing  10  as illustrated in  FIG.  7 B . For example, a part of the display  110  may be not exposed to the outside of the housing  10  so as not to show the black screen area (or the content non-display area) determined by the ratio of the output visual content. By way of example, when the visual content is an image with the aspect ratio of 21:9, the display  110  may protrude from the housing  10  such that the aspect ratio of the display  110  becomes the ratio 21:9, thereby providing the content without the black screen area. 
       FIG.  8    is a diagram provided to describe a furniture function, according to an exemplary embodiment. 
     As illustrated in  FIG.  8   , the audio-visual device  100  may be used as the furniture providing a simple storage function by means of the accessories  31 ,  32 ,  33 ,  34  attached to the front surface  15  of the housing  10 . 
     For example, as illustrated, the plurality of holes  15   a  on the front surface  15  of the housing  10  may be formed so as to fix the accessories  31 ,  32 ,  33 ,  34 . In this case, the accessories  31 ,  32 ,  33 ,  34  may have various shapes suitable to be fixed to the holes, for example, a flat panel shape, a rod shape, a rough bracket shape, or the like. The accessories  31 ,  32 ,  33 ,  34  may store a variety of items. 
       FIG.  9    is a flowchart provided to describe a method for controlling an audio-visual system, according to an exemplary embodiment. 
     Referring to  FIG.  9   , there is provided a method for controlling an audio-visual system including a housing configured to include an open upper end and a storage space inside the housing, an audio-visual device configured to be installed inside the housing and exposable through the upper end of the housing, and a lifting device configured to expose the audio-visual device or store the audio-visual device inside the housing through the upper end of the housing. According to the method, in response to an event occurring in the audio-visual device being a first event (S 910 : Y), the audio-visual device operates in a first mode for outputting a media art content while the display of the audio-visual device is stored in the housing (S 920 ). 
     In response to the event occurring in the audio-visual device being a second event (S 930 : Y), the audio-visual device operates in a second mode for outputting an audio content through a speaker of the audio-visual device while a part of the display is exposed to an outside through the upper end of the housing (S 940 ). 
     In response to the event occurring in the audio-visual device being a third event (S 950 : Y), the audio-visual device operates in a third mode for outputting a visual content while all of an appropriate portion (based on the visual content) of the display is exposed to the outside through the upper end of the housing (S 960 ). 
     In this case, the lifting device may include a lifting unit configured to be installed on a lower part of the display so as to make the display project through the upper end of the housing and a driving unit configured to drive the lifting unit. In this case, in response to the mode being determined according to an event, the audio-visual device may control the driving status of the driving unit such that the display projects or is stored in a state corresponding to the determined mode. 
     Further, in response to a mode being determined according to an event, the method may further include performing local dimming to at least a part of a screen area of the display based on a size of a content output in the determined mode. 
     In response to a mode being determined according to an event, the method may further include automatically communicating with a source device providing content which is outputtable in the determined mode. 
     In response to a mode being determined according to an event, the method may further include activating at least one speaker corresponding to sound output in the determined mode and performing equalization for the sound. 
     The method may further include providing a UI where information related to the audio content is reconstructed based on a size of the part of the display exposed in the second mode, through the exposed part of the display. 
     Further, according to an exemplary embodiment, the housing includes a front surface where a plurality of holes are formed with a predetermined distance therebetween. In this case, the method may further include sensing an accessory attached by means of the plurality of holes and displaying the media art content in a display area corresponding to a position where the accessory is not attached, based on a sensing result of the sensor, in the first mode. 
     According to the above-described various exemplary embodiments, the audio-visual system may provide a user with an image-viewing/sound-listening environment according to respective modes optimized for diverse content types, thereby enhancing user convenience. Further, the audio-visual system may function as storage furniture contributing to the home interior decoration, thereby satisfying user&#39;s aesthetic needs. 
     The methods according to the above-described various exemplary embodiments may be implemented simply by upgrading the software or hardware of the conventional audio-visual devices. 
     In addition, the above-described various exemplary embodiments may be realized through an embedded server in the audio-visual device or an external server outside the audio-visual device. 
     The inventive concept may also be embodied as a non-transitory computer readable medium including a program that is executed by a processor or a computer for sequentially executing operations of the above-described method may be provided. 
     The non-transitory computer readable medium refers to a medium that stores data permanently or semi-permanently unlike a register, a cache, or a memory that stores data for a short time, and is readable by a device. Particularly, the above-described various applications and programs may be stored in and provided through the non-transitory computer readable medium, such as, a Compact Disc (CD), a Digital Versatile Disk (DVD), a hard disk, a Blu-ray disk, a USB, a memory card, a ROM, or the like. 
     As provided above, a few exemplary embodiments have been shown and described. The foregoing exemplary embodiments and advantages are merely exemplary and are not to be construed as limiting the present disclosure. The present teaching can be readily applied to other types of devices. Also, the description of the exemplary embodiments is intended to be illustrative, and not to limit the scope of the claims, and many alternatives, modifications, and variations will be apparent to a person having ordinary skill in the art.