Display apparatus and control method thereof

Abstract

The invention relates to a display device and a control method thereof. A display device according to one embodiment includes: a first display; a second display disposed at a front side of the first display, having a predetermined distance between the first display and the second display, and disposed parallel to the first display; and a controller configured to control the first display and the second display to alternately output the specific graphic object to achieve output of the three-dimensional image.

Description

Technical Field

[0001] The present disclosure relates to a display device and a control method thereof, and more particularly, to a display device that outputs a three-dimensional image using a plurality of displays and a control method thereof. Background Art

[0002] Display devices include any device that receives and outputs broadcast signals, records and plays back video signals, and records and plays back audio signals. For example, display devices include televisions, smart TVs, computer monitors, all-in-one PCs (or integrated PCs) that combine a monitor and a main body, laptop computers, projectors, tablet computers, mobile terminals, etc.

[0003] With the diversification of functions, the display device has been implemented as an integrated multimedia player, which combines the functions of capturing still images or moving images, playing games, receiving broadcasts, etc. in addition to playing back broadcasts or music or video files. In recent years, the display device has also been implemented as a smart device (e.g., a smart TV). Therefore, the display device operates together with the execution of a mobile terminal, a computer or a server, and the Internet.

[0004] On the other hand, recently, various technologies are being used to output three-dimensional images, and development of technologies to output three-dimensional images using various displays such as holograms, kiosks, and signage is in progress. Summary of the invention Technical issues

[0005] One aspect of the present disclosure is to provide a display device capable of outputting a three-dimensional image using a plurality of displays and a control method thereof. Solution to the problem

[0006] In order to achieve aspects and other advantages of the present disclosure, a display device is provided, which may include: a first display; a second display, which is arranged at the front side of the first display, with a predetermined distance between the first display and the second display, and the second display is arranged parallel to the first display; and a controller, which is configured to control the first display and the second display to alternately output specific graphic objects to achieve the output of a three-dimensional image.

[0007] In the embodiments disclosed herein, the controller may not output a specific graphic object to the second display when outputting the specific graphic object to the first display, and may not output the specific graphic object to the first display when outputting the specific graphic object to the second display.

[0008] In an embodiment disclosed herein, the controller may output the specific graphic object in the same size when outputting the specific graphic object to the first display and when outputting the specific graphic object to the second display.

[0009] In an embodiment disclosed herein, the controller may output the specific graphic object in a first size when outputting the specific graphic object to the first display, and output the specific graphic object in a second size larger than the first size when outputting the specific graphic object to the second display.

[0010] In the embodiments disclosed herein, the controller may output a specific graphic object at a corresponding position based on a direction vertically passing through the first display and the second display.

[0011] In the embodiments disclosed herein, the first display and the second display may have the same output size.

[0012] In the embodiments disclosed herein, the display device may further include a housing configured to surround edges of the first display and the second display.

[0013] In the embodiments disclosed herein, the lighting device may be disposed at a corner of the housing.

[0014] In the embodiments disclosed herein, the lighting device may output light with dimmed brightness from the second display toward the first display.

[0015] In the embodiments disclosed herein, the second display may be a transparent display.

[0016] In the embodiments disclosed herein, the controller may set a region in the first display to have a size smaller than an output screen of the second display, and output a specific graphic object within the region.

[0017] In the embodiments disclosed herein, the controller may display, on the first display, a guide image provided to assist in identifying the area.

[0018] In the embodiments disclosed herein, the guide image may include a graphic formed to identify the area, and a plurality of lines drawn toward a vertex of the first display.

[0019] In the embodiments disclosed herein, the size of a particular graphic object may decrease as the size of a region decreases.

[0020] In the embodiments disclosed herein, the display device may further include: a communication unit configured to perform communication with an external display; and a camera configured to photograph a user located in a front direction of the display device.

[0021] In the embodiments disclosed herein, the controller may perform a video call connection with the external display through the communication unit, and output an object corresponding to the external user photographed on the external display to any one of the first display and the second display.

[0022] In the embodiments disclosed herein, the controller may output an object corresponding to the external user captured on the external display to the second display when the voice of the external user is output, and output the object to the first display when the voice of the external user is not output.

[0023] In an embodiment disclosed herein, the display device may further include a sensing unit for sensing movement of a user, and the controller may output a portion of the background image to the first display and change the portion of the background image output to the first display to another portion in response to the sensing unit sensing the movement of the user.

[0024] In an embodiment disclosed herein, while a first portion of a background image is being output to a first display, when a sensing unit senses that a user is moving in a first direction, a controller may output to the first display a portion based on the first portion of the background image located in a second direction opposite to the first direction.

[0025] In the embodiments disclosed herein, the first portion and the second portion may at least partially overlap each other.

[0026] In embodiments disclosed herein, the controller may determine a speed at which the first portion changes to the second portion to correspond to a speed at which the user moves. Advantageous Effects of the Invention

[0027] According to the present disclosure, multiple displays can be arranged in parallel with each other so that graphic objects can be alternately output to the displays arranged at the front and rear sides. Thus, the output of a three-dimensional stereoscopic image can be realized, and an image output method capable of optimizing a three-dimensional effect can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 and Figure 2 is a conceptual diagram illustrating a display device according to an embodiment of the present disclosure.

[0029] Figure 3 and Figure 4 is a conceptual diagram for explaining a method of providing a three-dimensional effect by using a display device when a phone call is performed using a plurality of display devices.

[0030] Figure 5 is a conceptual diagram for explaining a method of improving a three-dimensional effect by adjusting (manipulating) a background according to a user's movement.

[0031] Figure 6 is a conceptual diagram illustrating a display device according to the present disclosure. DETAILED DESCRIPTION

[0032] With reference to the accompanying drawings, description will now be given in detail according to the exemplary embodiments disclosed herein. In order to be briefly described with reference to the accompanying drawings, the same or equivalent components may be provided with the same or similar reference numerals, and their description will not be repeated. Generally, suffixes such as "module" and "unit" may be used to refer to elements or components. The use of such suffixes is intended to only contribute to the description of the specification, and the suffixes themselves are intended not to give any specific meaning or function. In the present disclosure, for the sake of brevity, those known to ordinary technicians in the relevant field have generally been omitted. The accompanying drawings are used to help easily understand various technical features and it should be understood that the accompanying drawings do not limit the embodiments proposed herein. As such, the present disclosure should be interpreted as extending to any changes, equivalents and substitutions other than those specifically stated in the accompanying drawings.

[0033] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally used only to distinguish one element from another.

[0034] It will be understood that when an element is referred to as being “connected” to another element, the element can be connected to the other element or intervening elements may also exist. In contrast, when an element is referred to as being “directly connected” to another element, there are no intervening elements.

[0035] A singular expression may include a plural expression unless its expression clearly has a different meaning from the context.

[0036] Terms such as “including” or “having” are used herein and should be understood to be intended to indicate the presence of several components, functions or steps disclosed in the specification, and it is also understood that more or fewer components, functions or steps may be similarly utilized.

[0037] Figure 6 is a conceptual diagram illustrating a display device according to the present disclosure.

[0038] The display device 500 according to one embodiment of the present disclosure includes a tuner 210, a decoder (demodulator) 220, a signal input / output unit 230, an interface 240, a controller 180, a storage unit 260, a display unit 270, and an audio output unit 280. However, the external input device is a device separate from the display device 500, but may be included as a component of the display device 500.

[0039] Reference Figure 6, the tuner 210 selects a radio frequency (RF) broadcast signal corresponding to a channel selected by a user from among the radio frequency (RF) broadcast signals received through the antenna, and converts the RF broadcast signal into an intermediate frequency signal or a baseband video / audio signal. For example, if the RF broadcast signal is a digital broadcast signal, the tuner 210 converts the RF broadcast signal into a digital IF signal (DIF). On the other hand, if the RF broadcast signal is an analog broadcast signal, the tuner 210 converts the RF broadcast signal into an analog baseband video / audio signal (CVBS / SIF). Therefore, the tuner 210 may be a hybrid tuner capable of processing both digital broadcast signals and analog broadcast signals.

[0040] The digital IF signal (DIF) output from the tuner 210 may be input to the decoder 220, and the analog baseband video / audio signal (CVBS / SIF) output from the tuner 210 may be input to the controller 180. The tuner 220 may receive a single carrier RF broadcast signal according to an Advanced Television Systems Committee (ATSC) format or a multi-carrier RF broadcast signal according to a Digital Video Broadcasting (DVB) format.

[0041] Although the drawings show one tuner 210, the present disclosure is not limited thereto, and the display device 500 may include a plurality of tuners, for example, a first tuner and a second tuner. In this case, the first tuner may receive a first RF broadcast signal corresponding to a broadcast channel selected by a user, and the second tuner may sequentially or periodically receive a second RF broadcast signal corresponding to a pre-stored broadcast channel. Similar to the first tuner, the second tuner may convert the RF broadcast signal into a digital IF signal (DIF) or an analog baseband video / audio signal (CVBS / SIF).

[0042] The decoder 220 receives the digital IF signal (DIF) converted by the tuner 210 and decodes the received signal. For example, when the digital IF signal (DIF) output from the tuner 210 is a signal according to the ATSC format, the decoder 220 performs 8-vestigial sideband (8-VSB) demodulation. In this case, the decoder 220 can also perform channel decoding such as trellis decoding, deinterleaving and reed-Solomon decoding. To this end, the decoder 220 may include a trellis decoder, a deinterleaver, a reed-Solomon decoder, etc.

[0043] As another example, when the digital IF signal (DIF) output from the tuner 210 is a signal according to the DVB standard, the decoder 220 performs coded orthogonal frequency division modulation (COFDMA) demodulation. In this case, the decoder 220 may perform channel decoding such as convolution decoding, deinterleaving, Reed-Solomon decoding, etc. To this end, the decoder 220 may include a convolution decoder, a deinterleaver, a Reed-Solomon decoder, etc.

[0044] The signal input / output unit 230 is connected to an external device to perform signal input and output operations. To this end, the signal input / output unit 330 may include an A / V input / output unit (not shown) and a wireless communication unit (not shown).

[0045] The A / V input / output unit may include an Ethernet terminal, a USB terminal, a Composite Video Banking Sync (CVBS) terminal, a component terminal, an S-video terminal (analog), a Digital Video Interface (DVI) terminal, a High-Definition Multimedia Interface (HDMI) terminal, a Mobile High-Definition Link (MHL) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, an SPDIF terminal, a Liquid HD terminal, etc. Digital signals input through these terminals may be transmitted to the controller 180. In this case, analog signals input through the CVBS terminal and the S-video terminal may be converted into digital signals by an analog-to-digital converter (not shown) and transmitted to the controller 180.

[0046] The wireless communication unit can perform wireless Internet access. For example, the wireless communication unit can perform wireless Internet access by using wireless LAN (WLAN), Wi-Fi, wireless broadband (Wibro), world interoperability for microwave access (Wimax), high-speed downlink packet access (HSDPA), etc. In addition, the wireless communication unit can perform short-range wireless communication with other electronic devices. For example, the wireless communication unit can perform short-range wireless communication by using Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), ZigBee, etc.

[0047] The signal input / output unit 230 may transmit a video signal, an audio signal, and a data signal provided from an external device such as a digital versatile disk (DVD) player, a blue-ray player, a game console, a camcorder, a computer (laptop), a portable device, a smart phone, etc. to the controller 180. In addition, the signal input / output unit 230 may transmit a video signal, an audio signal, and a data signal of various media files stored in an external storage device such as a memory, a hard disk, etc. to the controller 180. Furthermore, the signal input / output unit 230 may output the video signal, the audio signal, and the data signal processed by the controller 180 to other external devices.

[0048] The signal input / output unit 230 may be connected to a set-top box (e.g., an Internet Protocol TV (IPTV) set-top box) via at least one of those various terminals to perform signal input and output operations. For example, the signal input / output unit 230 may send a video signal, an audio signal, and a data signal that have been processed by the IPTV set-top box to the controller 180, and may also send a signal processed by the controller 180 to the IPTV set-top box to achieve two-way communication. Here, IPTV may include ADSL-TV, VDSL-TV, FTTH-TV, etc., which are classified according to a transmission network.

[0049] The digital signal output from the decoder 220 and the signal input / output unit 230 may include a stream signal TS. The stream signal TS may be a signal in which a video signal, an audio signal, and a data signal are multiplexed. For example, the stream signal TS may be an MPEG-2 transport stream (TS) signal obtained by multiplexing an MPEG-2 video signal, a Dolby AC-3 audio signal, etc. Here, the MPEG-2 TS signal may include a 4-byte header and a 184-byte payload.

[0050] The interface 240 may receive an input signal for power control, channel selection, screen setting, etc. from the external input device 200, or transmit a signal processed by the controller 180 to the external input device 200. The interface 240 and the external input device 200 may be connected in a wired or wireless manner.

[0051] An example of the interface 240 may be a sensor unit, and the sensor unit is configured to detect an input signal from, for example, a remote controller.

[0052] The network interface (not shown) provides an interface for connecting the display device 500 to a wired / wireless network including an Internet network. The network interface may include an Ethernet terminal for connecting to a wired network, etc., and use wireless LAN (WLAN), Wi-Fi, wireless broadband (Wibro), World Interoperability for Microwave Access (Wimax), and High Speed ​​Downlink Packet Access (HSDPA) communication protocols to connect to a wireless network.

[0053] The network interface (not shown) can access a predetermined web page through the network. That is, the network interface can access a predetermined web page to perform transmission and reception of data with a corresponding server. In addition, the network interface can receive content or data provided by a content provider or a network operator. That is, the network interface can receive content such as movies, advertisements, games, VOD, broadcast signals, etc. and related information from a content provider or a network provider through the network. The network interface can also receive update information and update files of firmware provided by a network operator. The network interface can also send data to the Internet or a content provider or a network operator.

[0054] Furthermore, a network interface (not shown) may select and receive a desired application from applications open to the public through a network.

[0055] The controller 180 may control the overall operation of the display device 500. More specifically, the controller 180 is configured to control the generation and output of video or audio. For example, the controller 180 may control the tuner 210 to tune an RF broadcast signal corresponding to a channel selected by a user or a pre-stored channel. Although not shown in the drawings, the controller 180 may include a demultiplexer, a video processor, an audio processor, a data processor, an on-screen display (OSD) generator, etc. In addition, the controller 180 may also include a CPU, a peripheral device for hardware configuration.

[0056] The controller 180 may demultiplex a stream signal TS (eg, an MPEG-2 TS signal) into a video signal, an audio signal, and a data signal.

[0057] The controller 180 may perform video processing, for example, demodulation (decoding) of a demultiplexed video signal. In more detail, the controller 180 may decode an MPEG-2 encoded video signal using an MPEG-2 decoder, and may decode an H.264 encoded DMB or DVB handheld (DVB-H) signal by using an H.264 decoder. In addition, the controller 180 may adjust the brightness, hue, and color of a video signal through video processing. The video signal processed by the controller 180 may be sent to the display unit 270, or may be sent to an external output device (not shown) through an external output terminal.

[0058] The controller 180 can perform audio processing, for example, decoding the demultiplexed audio signal. In more detail, the controller 180 can decode the audio signal encoded by MPEG-2 using an MPEG-2 decoder, decode the DMB audio signal encoded by MPEG-4 bit sliced ​​arithmetic coding (BSAC) using an MPEG-4 decoder, and decode the DMB or DVB-H audio signal encoded by MPEG-2 Advanced Audio Codec (AAC) using an AAC decoder. In addition, the controller 180 can adjust the bass, treble and volume of the audio signal. The audio signal processed by the controller 180 can be sent to the audio output unit 280 (e.g., a speaker), or can be sent to an external output device.

[0059] The controller 180 may process an analog baseband video / audio signal (CVBS / SIF). Here, the analog baseband video / audio signal (CVBS / SIF) input to the controller 180 may be an analog baseband video / audio signal output from the tuner 210 or the signal input / output unit 230. The processed video signal is displayed on the display unit 270, and the processed audio signal is output through the audio output unit 280.

[0060] The controller 180 may perform data processing, for example, demodulation (decoding) of the demultiplexed data signal. Here, the data signal may include an Electronic Program Guide (EPG) information, which includes broadcast information related to a broadcast program broadcast on each channel, such as a start time, an end time, etc. For example, the EPG information may include ATSC Program and System Information Protocol (ATSC-PSIP) information and DVB Service Information (DVB-SI) information. ATSC-PSIP information or DVB-SI information may be included in an MPEG-2TS header (4 bytes).

[0061] The controller 180 may perform an on-screen display (OSD) process. In more detail, the controller 180 may generate an OSD signal for displaying various information as graphic or text data based on at least one of a video signal and a data signal or an input signal received from the external input device 200. The OSD signal may include various data such as a user interface (UI) screen and various menu screens, widgets, icons, etc. for the display device 500.

[0062] The storage unit 260 may store various programs for signal processing and control by the controller 180, and may also store processed video, audio, and data signals. The storage unit 260 may include at least one storage medium of a flash memory, a hard disk, a multimedia card micro storage medium, a card-type memory (e.g., an SD or XD memory), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk.

[0063] The display unit 270 can convert the video signal, data signal and OSD signal processed by the controller 180 into RGB signals, thereby generating a driving signal. The display unit 270 can output video through these signals. The display unit 270 can be implemented as various types of displays, such as a plasma display panel, a liquid crystal display (LCD), a thin film transistor-LCD (TFT-LCD), an organic light emitting diode (OLED), a flexible display, a three-dimensional (3D) display, an electronic ink display, etc. The display 370 can also be implemented as a touch screen, and therefore can be used as an input device.

[0064] The display unit 270 may include a first display 100 and a second display 200 which is disposed in front of the first display 100 with a predetermined distance therebetween and is arranged in parallel with the first display 100 .

[0065] For example, the first display 100 may be implemented as various displays such as the above-mentioned PDP, LCD, TFT-LCD, OLED, a flexible display, etc., and the second display 200 may be a transparent display.

[0066] In addition, the display unit 270 may further include a housing 300 disposed to surround edges of the first display 100 and the second display 200 .

[0067] Will refer to it later Figure 1 and Figure 2 A description related to this is given in more detail.

[0068] The audio output unit 280 outputs an audio signal, for example, a stereo signal or a 5.1 channel signal, processed by the controller 180. The audio output unit 280 may be implemented with various types of speakers.

[0069] At the same time, a shooting unit (not shown) for shooting the user may also be provided. The shooting unit (not shown) may be implemented with a single camera, but is not limited thereto, and may be implemented with a plurality of cameras. Video (image) information shot by the shooting unit (not shown) is input to the controller 180.

[0070] As described above, the display device 500 may further include a sensing unit (not shown) provided with at least one of a touch sensor, an audio sensor, a position sensor, an operation sensor, and a camera 502 to detect a user's gesture. A signal sensed by the sensing unit (not shown) may be transmitted to the controller 180 through the interface 240.

[0071] The controller 180 may detect a user's gesture by using a video obtained from the camera 502 or a signal sensed by a sensing unit (not shown), alone or in combination.

[0072] The power supply unit (not shown) supplies corresponding power to all components of the display device 500. In particular, the power supply unit may supply power to the controller 180 which may be implemented in the form of a system on chip (SOC), the display unit 270 for displaying a video, and the audio output unit 280 for outputting an audio signal.

[0073] To this end, the power supply unit (not shown) may include a converter (not shown) for converting AC power into DC power. At the same time, for example, the power supply unit may also include an inverter (not shown), and when the display unit 270 is implemented as a liquid crystal panel with a plurality of backlights, the inverter may perform a PWM operation for changing brightness or performing a dimming function.

[0074] The external input device is connected to the interface 240 in a wired or wireless manner, and sends an input signal generated according to the user input to the interface 240. The external input device may include a remote controller, a mouse, a keyboard, etc. The remote controller may send the input signal to the interface 240 via Bluetooth, RF communication, infrared communication, UWB, ZigBee, etc. The remote controller may be implemented as a space remote control device. The space remote control device may generate an input signal by sensing the movement of the subject in space. The external input device may include a mobile terminal according to an embodiment of the present disclosure.

[0075] The display device 500 may be implemented as a fixed digital broadcast receiver capable of receiving at least one of digital broadcasts of ATSC (8-VSB), digital broadcasts of DVB-T (COFDM), digital broadcasts of ISDB-T (BST-OFDM), etc. In addition, the display device 500 may be implemented as a mobile digital broadcast receiver capable of receiving at least one of digital broadcasts of terrestrial DMB, digital broadcasts of satellite DMB, digital broadcasts of ATSC-M / H, digital broadcasts of DVB-H (COFDM), and digital broadcasts in Media Forward Link Only (MediaFLO) format. In addition, the display device 500 may be implemented as a digital broadcast receiver for cable television, satellite communication, and IPTV.

[0076] Hereinafter, a display device of the present disclosure for effectively realizing a three-dimensional effect will be described in more detail with reference to the accompanying drawings.

[0077] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the spirit or essential characteristics of the disclosure.

[0078] Figure 1 and Figure 2 is a conceptual diagram illustrating a display device according to an embodiment of the present disclosure.

[0079] First, refer to Figure 1 According to one embodiment, a display device may include: a first display 100; a second display 200, which is disposed in front of the first display 100, with a predetermined distance between the first display and the second display, and the second display is arranged parallel to the first display 100; and a controller 180, which is configured to control the first display 100 and the second display 200 to output specific graphic objects in an alternating manner for outputting a three-dimensional image.

[0080] Specifically, when a specific graphic object is output to the first display 100, the controller 180 may control the second display 200 not to output the graphic object. On the other hand, when a specific graphic object is output to the second display 200, the controller 180 may control the first display 100 not to output the specific graphic object.

[0081] The specific graphic object may include all kinds of images, videos, texts, graphic objects generated by predetermined processing, three-dimensional images, etc. For example, in a video (telephone) call with a conversation partner using another display device, the specific graphic object may include an object representing the image of the conversation partner (or a dynamic object that only cuts the image of the conversation partner).

[0082] like Figure 1As shown, the first display 100 and the second display 200 may have the same output size.

[0083] In this case, the controller 180 may output the specific graphic object in different sizes or the same size when outputting the specific graphic object to the first display 100 and when outputting the specific graphic object to the second display 200 .

[0084] For example, the controller 180 may output the specific graphic object in the same size when outputting the specific graphic object to the first display 100 and when outputting the specific graphic object to the second display 200 .

[0085] Even if a specific graphic object is output in the same size, since the first display 100 is disposed further back (farther) from the user than the second display 200, the user may feel that the specific graphic object output to the first display 100 is smaller. Therefore, a three-dimensional effect may be provided to the user.

[0086] As another example, the controller 180 may output the specific graphic object in a first size when outputting it to the first display 100 , and in a second size larger than the first size when outputting it to the second display 200 .

[0087] With this configuration, in the present disclosure, a specific graphic object output on the first display 100 may be visually perceived as smaller, and the output size may also be smaller than the output size on the second display 200, which may provide a more significant three-dimensional effect.

[0088] In order to output a three-dimensional image, the controller 180 may output a specific graphic object at an appropriate (corresponding) position based on a direction vertically passing through the first display 100 and the second display 200 .

[0089] That is, when a specific graphic object is alternately output to the first display 100 and the second display 200 , the controller 180 may output the specific graphic object at a corresponding position based on a direction vertically passing through the first display 100 and the second display 200 .

[0090] At the same time, if Figure 1 As shown, in order to more effectively generate a three-dimensional effect, the display device 500 of the present disclosure may further include a housing 300 surrounding edges of the first display 100 and the second display 200 .

[0091] The housing 300 may be formed in a shape surrounding edges of the first display 100 and the second display 200 to create an inner space between the first display 100 and the second display 200 .

[0092] In addition, the housing 300 may be formed in a dark color (eg, black) to achieve a spatial impression.

[0093] The lighting devices 310 a , 310 b , 310 c , and 310 d may be disposed at corners of the housing 300 .

[0094] The lighting devices 310a, 310b, 310c and 310d may be used to achieve spatial perception, three-dimensional effects or depth perception.

[0095] To this end, the lighting devices 310a, 310b, 310c, and 310d may output light of dimming brightness from the second display 200 toward the first display 100. That is, the lighting device may generate a gradient effect such that it becomes darker as it moves from the second display 200 toward the first display 100.

[0096] The lighting device may be controlled by the controller 180 and may include a plurality of light emitting elements to produce a gradient effect.

[0097] Therefore, the plurality of light emitting elements included in the lighting device may be controlled to output brighter light when they are adjacent to the second display 200 , and the plurality of light emitting elements included in the lighting device may be controlled to output dimmer light when they are adjacent to the first display 100 .

[0098] Without being limited thereto, the lighting devices 310 a , 310 b , 310 c , and 310 d may be controlled by the controller 180 to output light of the same brightness in order to generate a spatial impression.

[0099] Furthermore, as described above, the second display 200 may be a transparent display.

[0100] Meanwhile, the controller 180 may also control the first display 100 to output a three-dimensional image in addition to the housing.

[0101] refer to Figure 2 , the controller 180 may set an area 400 having a size smaller than an output screen of the second display 200 in the first display 100 , and output a specific graphic object within the area 400 .

[0102] The area 400 may be set to be smaller than the output area of ​​the first display 100 based on the center of the first display 100 .

[0103] The controller 180 may display a guide image assisting the user recognition area 400 on the first display 100 .

[0104] For example, when the region 400 is formed in a rectangular shape, a guide image may be provided for the user to recognize the edge of the region 400 .

[0105] The guide image may include a figure formed to identify the area 400 , and a plurality of lines 410 a , 410 b , 410 c , and 410 d drawn toward vertices of the first display 100 .

[0106] The plurality of lines may be straight lines drawn from vertices of the figure formed to identify the area 400 toward vertices of the first display 100 .

[0107] The guide image may be an image that may generate a three-dimensional effect when the user views the display device 500 from the front.

[0108] In addition, the area 400 does not use the entire output area of ​​the first display 100, but may be formed in a size smaller than that of the second display 200. Therefore, the user may feel that a specific graphic object output to the first display 100 is located at a farther position.

[0109] That is, the controller 180 may control the size of the specific graphic object to decrease as the size of the area decreases.

[0110] As the size of the area 400 set in the first display 100 becomes smaller, the user may sense a greater depth (ie, as the size of the area 400 decreases, it may be sensed that the first display is located farther away).

[0111] In this case, when a specific graphic object is output to the first display 100 , it is output in the area 400 .

[0112] Despite Figure 2 The absence of a housing is shown in FIG. Figure 2 As described in the above, it should be understood that an example in which the housing 300 is provided while controlling the first display 100 is also included in the scope of the present disclosure.

[0113] Figure 3 and Figure 4 is a conceptual diagram for explaining a method of providing a three-dimensional effect by using a display device when a video (telephone) call is performed through a plurality of display devices.

[0114] The display device 500 of the present disclosure may further include: a communication unit configured to communicate with an external display; and a camera 502 configured to photograph a user located in front of the display device.

[0115] The display device 500 may perform a video call (or a telephone call, a video conference, etc.) with an external display using the communication unit and the camera 502 (and the audio input / output unit 280 ).

[0116] like Figure 3As shown, the display device 500 can perform a video call connection through communication with an external display used by external users B and C.

[0117] like Figure 4 As shown in (a), the controller 180 can perform a video call connection with the external display through the communication unit, and output objects 511, 521 corresponding to external users 510, 520 photographed on the external display to any one of the first display 100 and the second display 200.

[0118] The controller 180 may receive an image (or an object corresponding to an external user captured in the image) captured by the camera 512, 522 of the external display through the communication unit. In addition, the controller 180 may receive an audio signal from the external display through the communication unit, and determine whether the external user is speaking by using the received audio signal.

[0119] like Figure 4 As shown in (b) and (c), the controller 180 can output an object corresponding to the external user that has been captured on the external display on the second display when the voice of the external user is output, and output an object corresponding to the external user that has been captured on the external display on the first display when the voice of the external user is not output.

[0120] For example, when the external user C is speaking (or when an audio signal is received from the external display of the external user C), Figure 4 As shown in (b) of FIG. 1 , the controller 180 may output an object 521 corresponding to the external user C to the second display 200 .

[0121] In addition, if Figure 4 As shown in (b) of FIG. 1 , when the external user B is not speaking, the controller 180 may output an object 511 corresponding to the external user B to the first display 100 .

[0122] like Figure 4 As shown in (a), in a state where neither external user B nor C is speaking (when no audio signal is received from both the external display of external user B and the external display of external user C), the controller 180 can output both objects 511 and 521 corresponding to external users B and C to the first display 100.

[0123] In addition, if Figure 4As shown in (c), when the external user B is speaking and the external user C is not speaking (i.e., when an audio signal is received from the external display of the external user B and no audio signal is received from the external display of the external user C), the controller 180 may output an object 511 of the external user B captured on the external display from which the audio signal has been received to the second display 200, and output an object 521 of the external user C captured on the external display from which the audio signal has not been received to the first display 100.

[0124] With this configuration, the present disclosure can provide a three-dimensional effect by outputting an external user who is speaking to a front display and outputting another user who is not speaking to a rear display during a video call.

[0125] Figure 5 is a conceptual diagram for explaining a method of improving a three-dimensional effect by adjusting (manipulating) a background according to a user's movement.

[0126] refer to Figure 5 , the display device of the present disclosure can dynamically output a background image to improve the three-dimensional effect.

[0127] refer to Figure 5 (a) and (b), the controller 180 may output a portion 610a of the background image 600 to the first display.

[0128] The display device may further include a sensing unit to sense a user's motion.

[0129] The sensing unit may be a camera 502 and may include a proximity sensor, a motion sensor, an RGB sensor, an infrared (IR) sensor, an ultrasonic sensor, an optical sensor (eg, a camera), and the like.

[0130] The controller 180 may change a portion 610a of the background image that has been output on the first display 100 to another portion 610b in response to the user's motion sensed by the sensing unit.

[0131] Specifically, while the first part 610a of the background image is being output on the first display 100, when the sensing unit senses that the user is moving in a first direction, the controller 180 may output a second part on the first display 100, the second part being located in a second direction opposite to the first direction based on the first part of the background image.

[0132] For example, Figure 5As shown in (c), when it is sensed that the user moves to the right, the controller 180 can output the second part 610b (A, B) located on the left side opposite to the right side based on the first part 610a (B, C) of the background image 600 on the first display 100.

[0133] As another example, Figure 5 As shown in (d), when it is sensed that the user moves to the left, the controller 180 can output the third part 610c (C, D) located on the right side opposite to the left side based on the first part 610a (B, C) of the background image 600 on the first display 100.

[0134] The first portion 610a and the second portion 610b may at least partially overlap each other (eg, a portion of a letter B), and when the first portion changes to the second portion, the display area may change in a sliding manner.

[0135] Similarly, the first portion 610a and the third portion 610c may at least partially overlap each other (eg, a portion of the letter C), and when the first portion changes to the third portion, the display area may change in a sliding manner.

[0136] In addition, the controller 180 may determine the moving speed of the user through the sensing unit.

[0137] The controller 180 may determine a speed at which the first portion is changed into the second portion to correspond to a moving speed of the user sensed by the sensing unit.

[0138] According to the present disclosure, multiple displays can be arranged in parallel with each other so that graphic objects can be alternately output to the displays arranged at the front and rear sides. Thus, the output of a three-dimensional stereoscopic image can be realized, and an image output method capable of optimizing a three-dimensional effect can be realized.

[0139] The present disclosure can be implemented as a computer-readable code in a program recording medium. Computer-readable media may include all types of recording devices, each of which stores data that can be read by a computer system. Examples of such computer-readable media may include hard disk drives (HDDs), solid-state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage elements, etc. In addition, computer-readable media may also be implemented as a format of a carrier wave (e.g., transmission via the Internet). The computer may include a controller 180 of a terminal. Therefore, it should also be understood that, unless otherwise stated, the above-described embodiments are not limited by any of the details described above, but should be interpreted broadly within the scope defined in the appended claims, and therefore, all changes and modifications falling within the limits and scopes of the claims or within the equivalents of these limits and scopes are therefore intended to be covered by the appended claims.

Claims

1. A display device, comprising: a first display; a second display, placed in front of the first display, wherein the second display is transparent; a communication unit configured to perform communication for video calling with at least two external devices; and The processor is configured as: Based on the connection between the video call and a first external device among the at least two external devices, the first display or the second display displays an image of a first participant corresponding to the first external device; Based on the connection of the video call with a second external device among the at least two external devices, causing the first display or the second display to display an image of a second participant corresponding to the second external device; and causing the second display to display an image of the first participant in response to detecting that the first participant is speaking based on audio data received from the first external device, or to display an image of the second participant in response to detecting that the second participant is speaking based on audio data received from the second external device, The image of the participant displayed on the second display is displayed in a larger size than the image of the same participant displayed on the first display to enhance the sense of depth of the display device.

2. The display device according to claim 1, further comprising a housing extending between respective edges of the first display and the second display, wherein: The housing is configured to define an inner space between the first display and the second display. 3 . The display device according to claim 2 , further comprising a plurality of light sources, which are disposed inside the housing and are configured to emit light toward the internal space such that the light emitted toward the second display is brighter than the light emitted toward the first display.

4. The display device according to claim 3, wherein: The plurality of light sources are also configured to emit light to have a brightness level that decreases from the second display toward the first display.

5. The display device according to claim 1, wherein: Based on the first display displaying the first participant or the second participant, the processor is further configured to cause the first display to display a guide image surrounding the displayed first participant or the second participant.

6. The display device according to claim 5, wherein: The displayed guide image includes a plurality of perspective lines to further enhance the sense of depth of the display device. 7 . The display device of claim 1 , further comprising a camera configured to capture an image of a user of the display device during the video call.

8. The display device according to claim 1, wherein: The processor is also configured to cause the first display to display a background image, the background image being displayed to appear behind the displayed first participant or the second participant.

9. The display device according to claim 8, further comprising a sensor configured to detect movement of a user located in front of the display device, wherein The processor is further configured to: The displayed background image is changed corresponding to the left-right movement of the user detected via the sensor so that the background image appears to move relative to the displayed first participant or the second participant.

10. A display device, comprising: a first display; a second display, placed in front of the first display, wherein the second display is transparent; a communication unit configured to perform communication for making a video call; and The processor is configured as: Based on the connection of the video call with the first external device, causing the first display to display an image of a first participant corresponding to the first external device; and in response to detecting that the first participant is speaking based on audio data received from the first external device, causing the second display to display an image of the first participant, The image of the first participant displayed on the second display is displayed in a larger size than the image of the first participant displayed on the first display, so as to enhance the sense of depth of the display device.

11. The display device according to claim 10, wherein: The video call also includes a second external device; and The processor is further configured to, in response to detecting that the first participant is speaking, cause the first display to display an image of a second participant corresponding to the second external device while displaying the first participant on the second display.

12. The display device according to claim 10, further comprising a housing extending between respective edges of the first display and the second display, wherein: The housing is configured to define an inner space between the first display and the second display. 13 . The display device according to claim 12 , further comprising a plurality of light sources disposed inside the housing and configured to emit light toward the internal space such that the light emitted toward the second display is brighter than the light emitted toward the first display.

14. The display device according to claim 13, wherein: The plurality of light sources are also configured to emit light to have a brightness level that decreases from the second display toward the first display.

15. The display device according to claim 11, wherein: The processor is also configured to cause the first display to display a guide image surrounding the displayed second participant.

16. The display device according to claim 15, wherein: The displayed guide image includes a plurality of perspective lines to further enhance the sense of depth of the display device. 17 . The display device of claim 10 , further comprising a camera configured to capture an image of a user of the display device during the video call.

18. The display device according to claim 11, wherein: The processor is also configured to cause the first display to display a background image, the background image being displayed to appear behind the displayed second participant.

19. The display device according to claim 18, further comprising a sensor configured to detect movement of a user located in front of the display device, in, The processor is further configured to: The displayed background image is changed corresponding to the left-right movement of the user detected via the sensor so that the background image appears to move relative to the displayed second participant.

20. A display device, comprising: a first display; a second display, placed in front of the first display, wherein the second display is transparent; a communication unit configured to perform communication for video calling with at least two external devices; and The processor is configured as: Based on the connection between the video call and a first external device among the at least two external devices, the first display or the second display displays an image of a first participant corresponding to the first external device; Based on the connection of the video call with a second external device among the at least two external devices, causing the first display or the second display to display an image of a second participant corresponding to the second external device; in response to detecting that the first participant is speaking based on audio data received from the first external device, causing the second display to display an image of the first participant and causing the first display to display an image of the second participant; and in response to detecting that the second participant is speaking based on audio data received from the second external device, causing the second display to display an image of the second participant and causing the first display to display an image of the first participant, The image of the participant displayed on the second display is displayed in a larger size than the image of the same participant displayed on the first display to enhance the sense of depth of the display device.

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