KR20210032797A - Apparatus and method for proving continuous viewing function by using a second device in a wireless av system - Google Patents

Abstract

The present invention relates to a device for providing a continuous viewing function through a second device in a wireless AV system, and a method thereof. Provided is a data transmission device which comprises: a wireless communication unit configured to transmit a data stream to at least one of a plurality of display devices; and a control unit obtaining state information from the plurality of display devices by controlling the wireless communication unit, and configured to transmit setting information of a first display device to a second display device recognized by a user among the plurality of display devices when information instructing continuous viewing is received from the first display device among the plurality of display devices.

Description

Device and method for providing continuous viewing function using a second device in a wireless AV system {APPARATUS AND METHOD FOR PROVING CONTINUOUS VIEWING FUNCTION BY USING A SECOND DEVICE IN A WIRELESS AV SYSTEM}

The present invention relates to a wireless audio/video (AV) system, and more particularly, an apparatus for continuously viewing content being viewed through a first display device in a wireless AV system on a second display device, and It's about the method.

With the recent development of wireless communication technology and the spread of smart devices, wireless audio/video (AV) that wirelessly transmits a data stream composed of audio, video or picture, or a combination thereof. ) The demand for the system is also increasing.

Since the devices constituting the wireless AV system are based on wireless communication, the degree of freedom in installation or arrangement is relatively higher than that of devices connected by wire. In addition, in a wireless AV system, when a plurality of display devices are installed in multiple spaces, a user can view content on multiple display devices without space restrictions.

However, in the existing wireless AV system, when a user wants to continue to watch the broadcast content through the second TV provided in the bedroom while watching the broadcast content through the first TV set in the living room, the second TV is turned on and the channel Settings such as setting and volume setting are required. In addition, when a user wants to continue viewing the content through the second TV while watching the content on the first TV with an external input, the external input device in which the content is stored is removed from the first TV and then connected to the second TV. There is a hassle to do.

An object of the present invention is to provide a wireless data transmission device and method for continuously viewing content being viewed through a specific display device in a wireless AV system using another display device without cumbersome manipulation.

According to an aspect of the present invention, a wireless data transmission device included in a wireless audio video (AV) system includes a wireless communication unit configured to transmit a data stream to at least one of a plurality of display devices and a wireless communication unit to control the plurality of displays. When status information is obtained from a device and information instructing continuous viewing is received from a first display device among the plurality of display devices, a second display device recognized by a user among the plurality of display devices is used. And a control unit configured to transmit setting information.

In one aspect, the status information may include at least one of activation/deactivation information, received signal strength information, volume setting information, and image quality setting information of the corresponding display device.

In another aspect, the controller may control to transmit a state information request packet to the plurality of display devices, but determine that a display device in which a response packet to the state information request packet is not received is in an inactive state.

In another aspect, when a signal regarding deactivation of the first display device is received from the first display device, the control unit may control the first display device to display a screen indicating whether to continuously view or not.

In another aspect, the wireless data transmission device further includes a storage unit configured to store setting information of the first display device, wherein the setting information includes information on an input signal of the first display device, volume setting information, It may include at least one of image quality setting information.

In another aspect, when a signal indicating that a user is detected is received from a sensor provided in the second display device, the controller determines whether the second display device is in an active state based on state information of the second display device. It is possible to determine whether the second display device is in an active state, and control to transmit setting information of the first display device to the second display device.

In another aspect, the control unit calculates a reception error rate for the data stream transmitted to the second display device, and when the reception error rate is greater than or equal to a reference value, the control unit displays the second display device based on location information of the second display device. Beamforming may be performed on the target.

According to another aspect of the present invention, a method of wirelessly transmitting data by a wireless data transmission device in a wireless AV system includes obtaining status information of a corresponding display device from at least one of a plurality of display devices, among the plurality of display devices. Receiving information instructing continuous viewing from a first display device, and when a user is recognized by a second display device among the plurality of display devices, transmitting setting information of the first display device to the second display device Includes steps.

In one aspect, the status information may include at least one of activation/deactivation information, received signal strength information, volume setting information, and image quality setting information of the corresponding display device.

In another aspect, the obtaining includes transmitting a status information request packet to the corresponding display device and receiving a response packet for the status information request packet from the corresponding display device, wherein the wireless data transmission device May determine that the corresponding display device is in an inactive state when a response packet is not received from the corresponding display device.

In another aspect, prior to the receiving step, receiving a signal regarding deactivation of the first display device from the first display device, and controlling the first display device to display a screen regarding whether or not continuous viewing is displayed. It may include.

In another aspect, after the receiving step, further comprising storing setting information of the first display device, wherein the setting information includes information on an input signal of the first display device, volume setting information, and quality setting It may include at least one of information.

In another aspect, the transmitting includes receiving a signal indicating that a user is detected from a sensor provided in the second display device, and activating the second display device based on state information of the second display device. It may include the step of determining whether the state is.

In another aspect, after the transmitting step, transmitting a data stream to the second display device, calculating a reception error rate of the second display device for the data stream, and when the reception error rate is greater than or equal to a reference value, the It may further include performing beamforming on the second display device based on the location information of the second display device.

According to the present invention, even if a user moves to another space, content being viewed through a specific display device can be continuously viewed through another display device in the same environment. In addition, even in the case of external input content, continuous viewing is possible without installing or connecting external input devices to multiple display devices.

1 is a block diagram of a wireless AV system according to an embodiment.
2 is an exemplary diagram illustrating a case where a wireless AV system according to an embodiment is installed in a home.
3 is a flowchart illustrating a method of providing a continuous viewing function by a wireless data transmission apparatus according to an embodiment.
4 is a flowchart illustrating a method of transmitting data by a wireless data transmission apparatus according to an embodiment.

The following detailed description is an embodiment of a wireless data transmission apparatus and method, and a wireless data reception apparatus and method provided according to the present invention, and does not represent the only aspect of the present invention. Features of the invention are described by the illustrated embodiments. However, functions and structures that are the same as or equivalent to the exemplary embodiments described herein may be achieved by other embodiments that are also intended to be included within the spirit and scope of the present invention. Throughout this specification, like reference numbers indicate like parts or features. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In recent years, the design of display devices such as TVs is becoming more important, and display panels are gradually becoming thinner due to the development of display panel technology such as OLED. However, due to the basic thickness of the driving circuit driving the display panel, there is a limitation in manufacturing and designing the display panel thinner. Accordingly, a technology in which other components are physically or electrically separated from the display panel and provided in a separate device, except for components in which a physical and electrical connection to the display panel is indispensable, is in the spotlight. In this case, each device may be configured to exchange an image signal and an audio signal based on wireless communication with each other. Hereinafter, a device that transmits data wirelessly is referred to as a wireless data transmission device, and a device that displays data transmitted from the wireless data transmission device is referred to as a display device. The present invention relates to a wireless AV system or a wireless display system in which a wireless data transmission device and a display device are physically and/or electrically independent as described above, but reproduce media based on wireless communication with each other.

1 is a block diagram of a wireless AV system according to an embodiment.

Referring to FIG. 1, a wireless AV system 10 may include a wireless data transmission device 100 and at least one display device 200.

The wireless data transmission device 100 receives wired/wireless external signals related to audio, video, picture, image, multimedia, or at least one combination thereof. In addition, the received external signal may be processed in various ways to generate a data stream or a bit stream, and transmit it to the display apparatus 200 through a wireless interface.

In order to perform such an operation, the wireless data transmission device 100 includes an external signal receiving unit 110, an external device interface unit 115, a storage unit 120, a control unit 130, a wireless communication unit 140, and a power supply unit ( 150) may be included.

The external signal receiving unit 110 may include a tuner 111, a demodulation unit 112, and a network interface unit 113.

The tuner 111 receives wired/wireless external signals related to audio, video, video, image, multimedia, or at least one combination thereof. For example, the tuner 111 may tune into a specific broadcast channel according to a channel selection command and receive a broadcast signal for the tuned specific broadcast channel.

The demodulator 112 may separate the received external signal into a video signal, an image signal, a video signal, an audio signal, a data signal related to a broadcast program, etc., and the separated video signal, an image signal, a video signal, an audio signal, A data signal related to a broadcast program may be restored in a form capable of being output.

The external device interface unit 115 may receive an application, an application list, or content in an adjacent external device and transmit it to the control unit 130 or the storage unit 120.

The external device interface unit 115 may provide a connection path between the wireless data transmission device 100 and the external device. The external device interface unit 115 receives an external input signal including video, audio, video, image, multimedia, or at least one combination thereof from an external device wirelessly or wiredly connected to the wireless data transmission device 100, and You can pass it to (130). The external device interface unit 115 may include a plurality of external input terminals. The plurality of external input terminals may include a radio frequency (RF) terminal, an RGB terminal, a high definition multimedia interface (HDMI) terminal, a universal serial bus (USB) terminal, a component terminal, an AV terminal, a CI terminal, and the like. .

The external device connectable to the external device interface unit 115 may be any one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB memory, and a home theater, but this is only an example. .

The network interface unit 113 may provide an interface for connecting the wireless data transmission device 100 to a wired/wireless network including an Internet network. The network interface unit 113 may transmit or receive data with other users or other electronic devices through a connected network or another network linked to the connected network.

In addition, some content data stored in the main body device 100 may be transmitted to another user registered in advance in the wireless data transmission device 100 or a selected user or a selected electronic device among other electronic devices.

The network interface unit 113 may access a predetermined web page through a connected network or another network linked to the connected network. That is, by accessing a predetermined web page through a network, the server and data can be transmitted or received.

In addition, the network interface unit 113 may receive content or data provided by a content provider or a network operator. That is, the network interface unit 113 may receive content such as movies, advertisements, games, VODs, broadcast signals, and related information provided from a content provider or a network provider through a network.

In addition, the network interface unit 113 may receive update information and an update file of firmware provided by a network operator, and may transmit data to the Internet or a content provider or a network operator.

The network interface unit 113 may select and receive a desired application from among applications open to the public through a network.

The storage unit 120 may store a program for processing and controlling each signal in the controller 130, and may store a signal-processed image, audio, or data signal.

In addition, the storage unit 120 may perform a function for temporary storage of an application, application list, video, audio, or data signal input from the external device interface unit 115 or the network interface unit 113, and Information on a predetermined image can be stored through the memory function.

In addition, the storage unit 120 may store state information, setting information, and the like of at least one display device 200 obtained through the wireless communication unit 140.

The control unit 130 may control the wireless data transmission device 100 by a user command or an internal program input through a remote control device (not shown), and access the network to obtain an application or application list desired by the user by wireless data. It can be made to be downloaded into the transmission device 100. The remote control device performs an operation of remotely controlling power on and off, channel selection, and screen setting of the wireless data transmission device 100 and/or the display device 200, and may be referred to as a remote control.

The control unit 130 may enable the channel information selected by the user to be output through at least one display apparatus 200 together with an external signal received through the external signal receiving unit 100.

In addition, the control unit 130 provides an image from an external device input through the external device interface unit 115, for example, a camera, a camcorder, or a USB device, according to an external device image playback command received through the remote control device. A signal or an audio signal may be output through at least one display device 200.

In addition, the control unit 130 may control content stored in the storage unit 120, received broadcast content, and external input content input from the outside to be played, and the content includes a broadcast image, an external input image, an audio file, It may be in various forms, such as a still image, a connected web screen, and a document file.

The control unit 130 decodes video, image, video, audio, data related to a broadcast program, etc. input through the demodulation unit 112 or the external device interface unit 115 or the storage unit 120, and stores the decoded data. It encodes according to the encoding/decoding method supported by the display apparatus 200 again, and generates a data stream or a bit stream by processing the encoded data with various image/audio processing techniques such as compression and encoding in order to transmit the encoded data through a wireless channel. Then, an operation of transmitting the generated data stream or bit stream to the at least one display device 200 through the wireless communication unit 140 may be performed.

Depending on the embodiment, the controller 130 bypasses the decoded data without encoding the decoded data again according to the encoding/decoding method supported by the corresponding display device 200 to bypass the wireless communication unit ( It may be transmitted directly to the display device 200 through the 140).

The controller 130 may be configured to implement a function, procedure, and/or method of a processor in the wireless data transmission device 100 described in each embodiment of the present specification. Layers of the air interface protocol may be implemented in the processor. For example, the controller 130 may be provided in the wireless data transmission apparatus 100 in the form of a system on chip (SoC).

The wireless communication unit 140 may be operatively coupled to the control unit 130 as a combination of, for example, a wireless communication chip and an RF antenna. The wireless communication unit 140 receives a data stream or a bit stream from the control unit 130 and generates a wireless stream by encoding and/or modulating the data stream or bit stream in a form for transmitting the data stream or the bit stream through a wireless channel. Transfer to. The wireless communication unit 140 forms a wireless link, and the wireless data transmission device 100 and the display device 200 are connected by a wireless link. The wireless communication unit 140 may be implemented based on various wireless communication methods such as short-range wireless communication such as WI-FI, Bluetooth, NFC, and RFID, or a mobile communication network (eg, 3G, 4G, 5G cellular network, etc.). For example, the wireless communication unit 140 may communicate with the display device 200 based on a communication protocol such as an IEEE 802.11 series standard.

The communication channel formed by the wireless communication unit 140 may be a network communication channel. In this case, the wireless communication unit 140 may establish a tunneled direct link setup (TDLS) to avoid or reduce network congestion. Wi-Fi Direct and TDLS are for setting up relatively short range communication sessions. The communication channel forming the wireless link may be a communication channel of a relatively short range, such as Wi-Fi, Bluetooth, etc. that use various frequencies such as 2.4 GHz, 3.6 GHz, 5 GHz, 60 GHz, or Ultra Wide Band (UWB). It may be a communication channel implemented using a physical channel structure.

Depending on the embodiment, the wireless communication unit 140 may include an image processing unit that performs an image processing (encoding, decoding, etc.) function. In this case, the wireless communication unit 140 may perform an operation of encoding the image transmitted from the control unit 130 in accordance with the image format of the display apparatus 200. Alternatively, the image processing unit may be provided in the control unit 130 other than the wireless communication unit 140. In this case, the controller 130 may perform an operation of encoding an image of an external input signal according to an image format of the display apparatus 200. Alternatively, the image processing unit may be provided as an independent entity connected to the wireless communication unit 140 and the control unit 130, respectively. In this case, the main body control unit 130 sends the image signal input through the external device interface 115 to the image processing unit, the image processing unit encodes the image signal and sends it to the wireless communication unit 140, and the wireless communication unit 140 encodes the image signal. The resulting image signal may be wirelessly transmitted to the display apparatus 200.

The power supply unit 150 supplies power to the external signal receiving unit 110, the external device interface unit 115, the storage unit 120, the control unit 130, and the wireless communication unit 140. A method in which the power supply unit 150 receives power from the outside may include a terminal method and a wireless method. When the power supply unit 150 receives power in a wireless manner, the power supply unit 150 may include a separate component for wirelessly receiving power. For example, the power supply unit 150 is a power pick-up unit configured to receive wireless power by magnetic coupling with an external wireless power transmitter, and the power pick-up unit to receive wireless power. A separate communication and control unit configured to perform communication with the wireless power transmission device and control transmission and reception of wireless power may be included.

The wireless communication unit 140 is also wirelessly connected to the remote control device, and transmits a signal input by the user to the control unit 130 or transmits a signal from the control unit 130 to the user. For example, the wireless communication unit 140 may be remotely configured according to various communication methods such as Bluetooth, Ultra-Wideband (WB), ZigBee method, Radio Frequency (RF) communication method, or infrared (IR) communication method. Control signals such as power on/off and screen setting of the wireless data transmission device 100 may be received and processed from the control device, or a control signal from the controller 130 may be transmitted to the remote control device 300. .

In addition, the wireless communication unit 140 may transmit a control signal input from a local key (not shown) such as a power key, a volume key, and a set value to the control unit 130.

Next, the display device 200 processes the data stream received from the wireless data transmission device 100 through the wireless interface as a reverse process of signal processing by the wireless data transmission device 100, and then processes the image and/or audio. You can perform an output operation.

For example, the display device 200 includes a wireless communication unit 210, a user input interface unit 220, a panel control unit 230, a display unit 240, an audio output unit 250, a power supply unit 260, and a sensor ( 270).

The wireless communication unit 210 may be configured with a combination of a wireless communication chip and an RF antenna. The wireless communication unit 210 is connected to the wireless communication unit 140 of the wireless data transmission device 100 by a wireless link, and performs wireless communication with the wireless communication unit 140 of the wireless data transmission device 100. Specifically, the wireless communication unit 210 receives a wireless stream from the wireless communication unit 140 of the wireless data transmission device 100, demodulates it, and sends it to the panel control unit 230. The wireless communication unit 210 may be implemented based on various wireless communication methods such as short-range wireless communication such as WI-FI, Bluetooth, NFC, and RFID, or a mobile communication network (eg, 3G, 4G, 5G cellular network, etc.). For example, the wireless communication unit 210 may communicate using a communication protocol such as an IEEE 802.11 series standard.

According to an embodiment, the wireless communication unit 210 may include an image processing unit that performs an image processing (encoding, decoding, etc.) function. In this case, the wireless communication unit 210 may perform an operation of decoding an image received from the wireless data transmission device 100. Alternatively, the image processing unit may be provided in the panel controller 230 instead of the wireless communication unit 210. In this case, the panel controller 230 may perform an operation of decoding an image transmitted from the wireless communication unit 210. Alternatively, the image processing unit may be provided as an independent entity connected to the wireless communication unit 210 and the panel control unit 230, respectively. In this case, the wireless communication unit 210 may wirelessly receive the image signal and send it to the image processing unit, and the image processing unit may decode the image signal and send it to the panel controller 230.

The panel control unit 230 decodes the signal demodulated by the wireless communication unit 210 to restore a bit stream or a data stream. At this time, when the bit stream or data stream is compressed, the panel controller 230 performs an operation of decompressing or restoring the bit stream or data stream, and then the video signal, image signal, video signal, audio signal, and broadcast program. The data signal related to the output may be output to the display unit 240, the audio output unit 250, and the user input interface unit 220, respectively.

A video signal, an image signal, an image signal, etc. may be input to the display unit 240 and displayed as an image corresponding to the corresponding image signal. In addition, the image signal processed by the panel control unit 230 is transmitted to the wireless data transmission device 100 through the wireless communication unit 210 again, and is externally transmitted through the external device interface unit 115 of the wireless data transmission device 100. Can be entered into the device.

The audio signal processed by the panel controller 230 may be audio output to the audio output unit 250. In addition, the voice signal processed by the panel control unit 230 is transmitted to the wireless data transmission device 100 through the wireless communication unit 210 again, and to an external device through the external device interface unit 115 of the main body device 100. Can be entered.

Meanwhile, the panel controller 230 may control the display unit 240 to display an image. For example, the panel control unit 230 may include a broadcast image input through the tuner 111, an external input image input through the external device interface unit 115, an image input through a network interface unit, or a storage unit ( The image stored in 120) may be controlled to be displayed on the display unit 240. In this case, the image displayed on the display unit 240 may be a still image or a moving image, and may be a 2D image or a 3D image.

The panel controller 230 may have a frame rate conversion (FRC) function. For example, the panel control unit 230 converts the image signal restored by the wireless communication unit 210 or the panel control unit 230 to a frame rate set in the display based on the FRC function, and converts it to a T-Con board. I can deliver.

The panel controller 230 may be configured to implement a function, procedure, and/or method of a processor in the display device 200 described in each embodiment of the present specification.

The user input interface unit 220 may transmit a signal input by the user to the panel controller 230 or may transmit a signal from the panel controller 230 to the user. For example, the user input interface unit 220 may be configured according to various communication methods such as Bluetooth, Ultra-Wideband (WB), ZigBee, Radio Frequency (RF) communication method, or infrared (IR) communication method. , Control signals such as power on/off of the display apparatus 200 and screen setting may be received and processed from the remote control device, or a control signal from the panel controller 230 may be transmitted to the remote control device.

In addition, the user input interface unit 220 may transmit a control signal input from a local key (not shown) such as a power key, a volume key, and a set value to the panel controller 230.

The power supply unit 260 supplies power to the wireless communication unit 210, the user input interface unit 220, the panel control unit 230, the display unit 240, the audio output unit 250, and the sensor 270 in the power-on mode. Can supply. In the power-off mode, the power supply unit 260 may supply power to the wireless communication unit 210, the panel controller 230, and the sensor 270 in the power-on mode. Here, the power-on mode may be referred to as a viewing mode, an activation mode, and the like, and the power-off mode may be referred to as a standby mode, and the deactivated power-on mode may be referred to as a viewing mode, a deactivation mode, or the like.

In this specification, deactivation of the wireless data transmission device may include an operation, function, or meaning according to various embodiments. As an example, deactivation of the wireless data transmission device may include an operation of turning off a function of transmitting data related to an image. As another example, deactivation of the wireless data transmission device may include an operation of powering off the wireless data transmission device by receiving a power off signal from a remote control. In any case, even if the wireless data transmission device is deactivated, the communication unit of the wireless data transmission device operates normally, and basic communication between the wireless data transmission device and the wireless data reception device can be maintained.

Activation or deactivation of the wireless data transmission device may be detected and managed by the main body controller 130 of FIG. 1 or the processor 1130 of FIG. 2.

In the present specification, activation of the wireless data receiving apparatus may include an operation, function, or meaning according to various embodiments. As an example, activation of the wireless data receiving apparatus may include turning on a function of receiving data related to an image. As another example, activation of the wireless data receiver may include an operation of receiving a power on signal from a remote control and turning on the power of the wireless data receiver. As another example, activation of the wireless data receiving device may include an operation of turning on the power of the display unit.

In this specification, deactivation may include an operation of turning off a function of receiving data related to an image. As another example, deactivation may include an operation of powering off the display apparatus 200 by receiving a power off signal from a remote control. As another example, deactivation may include an operation of powering off the display unit 240 and/or the audio output unit 250. In any case, even if the display device 200 is deactivated, the wireless communication unit 200 operates normally, and basic communication between the wireless data transmission device 100 and the display device 200 can be maintained. Activation or deactivation of the display device 200 may be managed by the controller 120 and/or the panel controller 230.

A method in which the power supply unit 260 receives power from the outside may include a terminal method and a wireless method. When the power supply unit 260 receives power through a wireless method, the power supply unit 260 may include a separate component for wirelessly receiving power. For example, the power supply unit 260 includes a power pick-up unit configured to receive wireless power by magnetic coupling with an external wireless power transmitter, and the power pick-up unit to receive wireless power. A separate communication and control unit configured to perform communication with the wireless power transmission device and control transmission and reception of wireless power may be included.

The sensor 270 may be configured to detect the presence of a user. For example, the sensor 270 is composed of an infrared sensor, a camera, a microphone, etc., and transmits an infrared signal, an image signal, an audio signal, etc. to the panel controller 230 when the presence of a user is detected around the display device 200. I can. When a user is detected by the sensor 270, the panel controller 230 activates the display unit 240 and/or the audio output unit 250 to set the operation mode of the display device 200 to a power-off mode. Can be switched to the power-on mode.

As an example, when the sensor 270 is composed of a camera, a mite, etc., the panel controller 230 compares the image signal and/or audio signal received from the sensor 270 with pre-registered user information to match the user. The operation of the display device 200 may be controlled according to the information set for the display device.

Since the wireless data transmission apparatus 100 and the display apparatus 200 shown in FIG. 1 are only one embodiment of the present invention. Some of the illustrated components may be integrated, added, or omitted according to specifications of the wireless data transmission apparatus 100 and the display apparatus 200 that are actually implemented. That is, if necessary, two or more components may be combined into one component, or one component may be subdivided into two or more components to be configured. In addition, the functions performed by each block are for explaining the embodiments of the present invention, and specific operations or devices thereof do not limit the scope of the present invention.

According to another embodiment of the present invention, unlike FIG. 1, the wireless data transmission device 100 does not include a tuner 111 and a demodulation unit 112, but a network interface unit 113 or an external device interface. An image may be received and reproduced through the unit 115.

For example, the wireless data transmission device 100 is an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services, and a content reproducing device for reproducing content input from the image processing device. It can be implemented separately.

In terms of system input/output, the wireless data transmission device 100 may be referred to as a wireless source device that provides a source wirelessly, and the display device 200 is a wireless sink device that provides a source wirelessly. sink device). Wireless source devices and wireless sink devices are compatible with standards such as Wireless HD, Wireless Home Digital Interface (WHDI), WiGig, Wireless USB and Wi-Fi Display (WFD) (also known as Miracast). WD) communication technologies may also be implemented.

From an application point of view, the wireless data transmission device 100 may be integrated in a form that forms part of a wireless set-top box, a wireless gaming console, a wireless digital video disk (DVD) player, and a wireless writer. In this case, the wireless data transmission device 100 may be provided in the form of a wireless communication module or chip. In addition, the display device 200 is a user device or electronic device having a display panel that displays images and videos (eg, wireless TV, wireless monitor, wireless projector, wireless printer, wireless vehicle dashboard display, wearable device, augmented reality). (AR) headset or virtual reality (VR) headset, etc.). In this case, the display device 200 may be provided in the form of a wireless communication module or a chip.

Meanwhile, the wireless data transmission apparatus 100 and the display apparatus 200 may be integrated into a form that forms part of a mobile device. For example, the wireless data transmission apparatus 100 and the display apparatus 200 may include a smartphone, a smart pad or tablets, or a mobile terminal including other types of wireless communication devices, portable computers with wireless communication cards, and personal computers. It may be incorporated into a digital image capturing device such as a portable digital assistant (PDA), a portable media player, a camera or camcorder, or other flash memory device with wireless communication capabilities. In this case, the wireless data transmission device 100 and the display device 200 may be provided in the form of a wireless communication module or chip.

A smartphone user may stream or stream video and audio output by the user's smartphone, tablet, or other computing device to another device, such as a television or projector, which may provide a higher resolution display or other enhanced user experience. Can be mirrored.

As described above, the wireless data transmission device 100 receives wired/wireless external signals related to audio, video, video, image, multimedia, or at least one combination thereof, and receives the received external signals in various ways. By processing, a data stream or a bit stream may be generated and transmitted to the display apparatus 200 through a wireless interface.

Hereinafter, the video/video/audio data transmitted through the wireless interface will be collectively referred to as wireless data. That is, the wireless data transmission device 100 may wirelessly communicate with the display device 200 and transmit wireless data. Therefore, from the perspective of a wireless data transmission/reception system, the display device 200 may be referred to as a wireless data reception device.

2 is an exemplary diagram illustrating a case where a wireless AV system according to an embodiment is installed in a home. Hereinafter, a continuous viewing function using a second device provided by the wireless data transmission device 100 will be described.

As an example in FIG. 2, the wireless data transmission device 100 and the first display device 200 are located in a living room, the second display device 201 is located in a first bedroom, and the third display device 202 is a second display device. A case in which the fourth display device 203 is located in the second bedroom and the fourth display device 203 is located in the third bedroom is illustrated. The wireless data transmission device 100 transmits a data stream to the first display device 200 located in a short distance through a communication channel of a 60 GHz band, and the second to fourth display devices 201 and 202 located at a relatively remote distance. As 203), a data stream may be transmitted through a communication channel of a 2.4 GHz band to a 5 GHz band.

In addition, the wireless data transmission device 100 may obtain status information from a plurality of display devices 200, 201, 202, and 203 in the wireless AV system by controlling the wireless communication unit. Here, the status information may include at least one of activation/deactivation information, received signal strength information, volume setting information, and image quality setting information of the corresponding display device. As an example, the wireless data transmission device 100 periodically transmits status information to each display device 200, 201, 202, 203 in order to obtain status information of the display devices 200, 201, 202, and 203 in the wireless AV system. Request packet can be transmitted. However, when there is a display device that the user is watching, the status information request packet may not be transmitted to the display device. Status information received from the plurality of display devices 200, 201, 202, 203 may be stored in a storage unit of the wireless data transmission device 100. If external power is not supplied to a specific display device or due to a network error, the wireless data transmission device 100 fails to receive a response packet to the status information request packet from a specific display device, the wireless data transmission device 200 ) May determine that the corresponding display device is in an inactive state. The response packet may include, for example, received signal strength information, volume setting information, screen setting information, image quality setting information, and the like of a corresponding display device.

When a user views content through the device of the first display 200 in a living room, the wireless data transmission device 100 may transmit a data stream to the first display device 200. At this time, when the user moves to the first bedroom and wants to continuously view the corresponding content (broadcast content, external input content, etc.), the wireless data transmission device 100 receives a signal regarding deactivation of the first display device 200. If so, it is possible to control the first display device 200 to display an On Screen Display (OSD) regarding whether or not to continuously view. Alternatively, reception of a signal related to deactivation of the first display device 200 and display of the OSD are performed by the panel controller of the first display device 200, and the wireless data transmission device 100 is transmitted from the first display device 200. When information instructing continuous viewing is received, setting information of the first display device 200 may be stored. Here, the setting information is setting information on the content being played by the first display device 200, and includes information on the input signal of the first display device 200, volume setting information on the content being played back, and image quality setting information. Can include. When the input signal to the first display device 200 is a broadcast signal, information on the input signal may include broadcast channel information. When the input signal to the first display device 200 is an external input signal, the information on the input signal may include reproduction time information of the corresponding content.

When the user turns off the first display device 100 and moves from the living room to the first bedroom, the wireless data transmission device 100 transmits a signal indicating that the user is detected from a sensor provided in the second display device 201. You can receive it. In this case, the wireless data transmission device 100 may determine whether the second display device 201 is in an active state based on the state information of the second display device 201. When the second display device 201 is in an active state, the wireless data transmission device 100 may transmit setting information of the first display device 200 to the second display device 201. When the second display device 201 is in an inactive state, the wireless data transmission device 100 switches the second display device 201 to the active state, while the second display device 201 is used as the first display device 200. ) Setting information can be transmitted. Thereafter, the wireless data transmission device 100 may continuously transmit a data stream for the content that the user is viewing through the first display device 200 to the second display device 201.

For example, when the content played through the first display device 200 is content input through an external device interface, the wireless data transmission device 100 may transmit a data stream for the content transmitted to the first display device 200. After stopping, when the user is detected by the second display device 201, it may be continuously transmitted to the second display device 201.

As another example, when the second display device 201 includes a broadcast signal receiving module and the content reproduced through the first display device 200 is a broadcast signal content, the wireless data transmission device 100 Setting information of the first display device 200 may be transmitted to the device 201. In this case, the second display device 201 may set a channel, a volume, and an image quality based on the setting information, and reproduce a broadcast signal as set by the first display device 200 through the corresponding broadcast channel. However, when a separate broadcast signal receiving module is not provided in the second display device 201, the wireless data transmission device 100 transmits the setting information of the first display device 200 to the second display device 201, and , The broadcast signal may be bypassed to the second display device 201.

Meanwhile, the wireless data transmission device 100 may calculate a reception error rate for the data stream while transmitting the data stream to the display device being viewed by the user. If the reception error rate is greater than or equal to the reference value, the wireless data transmission device 100 may perform beamforming on the corresponding display device based on the location information of the corresponding display device. Here, the location information of the display device may include information about a distance and/or an angle from the wireless data transmission device 100 to the corresponding display device. As an example, the wireless data transmission device 100 may collect information about the distance and/or angle by measuring a distance or angle from the wireless data transmission device 100 to the display device. Methods of measuring the distance and/or angle may be various.

3 is a flowchart illustrating a method of providing a continuous viewing function by a wireless data transmission apparatus according to an embodiment.

Referring to FIG. 3, the wireless data transmission device may obtain state information of a corresponding display device from at least one of a plurality of display devices existing in the wireless AV system (S310). Here, the status information may include activation/deactivation information of the corresponding display device, received signal strength information, volume setting information, image quality setting information, and the like. To this end, as an example, the wireless data transmission device may transmit a status information request packet to each of a plurality of display devices, and receive a response packet to the status information request packet from each display device. If a response packet is not received from a specific display device, the wireless power transmission device may determine that the corresponding display device is in an inactive state.

On the other hand, when the wireless data transmission device receives a signal regarding deactivation of the first display device from the first display device and/or the remote control device transmitting the data stream, the first display device displays a screen on whether to continuously view or not. Can be controlled. If information instructing continuous viewing is received from the first display device and/or the remote control device (S320), the wireless data transmission device may store setting information of the first display device (S330). Here, the setting information may include information on an input signal of a corresponding display device, volume setting information, screen setting information, image quality setting information, and the like.

Thereafter, when the user is recognized by the sensor of the second display device among the plurality of display devices in the wireless AV system (S340), the wireless data transmission device determines whether the second display device is in the active state based on the state information of the second display device. It is possible to determine whether or not to transmit the setting information of the first display device to the second display device, and to continuously transmit a data stream for the content played back by the first display device to the second display device (S350). At this time, the wireless power transmission device may stop the continuous viewing function when the timer expires as a user is not detected in any display device for more than a predetermined time.

4 is a flowchart illustrating a method of transmitting data by a wireless data transmission apparatus according to an embodiment.

Referring to FIG. 4, the wireless data transmission device may calculate a reception error rate of the display device for the data stream while transmitting the data stream to the display device (S410). If the reception error rate is less than the reference value, the wireless data transmission device may continuously transmit the data stream to the corresponding display device (S430). However, if the reception error rate is greater than or equal to the reference value, the wireless data transmission device may reduce the reception error rate by performing beamforming on the display device based on the location information of the display device (S440).

Since not all components or steps are essential in the wireless data transmission apparatus and method according to the embodiment of the present invention described above, it may be performed including some or all of the above-described components or steps. Further, embodiments of the above-described wireless data transmission apparatus and method may be performed in combination with each other. In addition, each of the components or steps described above does not necessarily have to be performed in the order described, and steps described later may be performed prior to the steps described earlier.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments of the present invention described above may be implemented separately or in combination with each other.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: wireless AV system
100: wireless data transmission device
200: display device

Claims (14)

A wireless data transmission device included in a wireless audio video (AV) system,
A wireless communication unit configured to transmit a data stream to at least one of a plurality of display devices; And
When the wireless communication unit is controlled to obtain status information from the plurality of display devices, and when information instructing continuous viewing is received from a first display device among the plurality of display devices, a user is recognized by a user among the plurality of display devices. 2 A control unit configured to transmit setting information of the first display device to a display device
Containing, data transmission device. The method of claim 1,
The status information,
And at least one of activation/deactivation information, received signal strength information, volume setting information, and image quality setting information of the corresponding display device. The method of claim 2,
The control unit,
And controlling to transmit a status information request packet to the plurality of display devices, wherein the display device in which a response packet to the status information request packet is not received is determined to be in an inactive state. The method of claim 1,
The control unit,
And when a signal relating to deactivation of the first display device is received from the first display device, the first display device controls to display a screen indicating whether to continuously view or not. The method of claim 1,
Further comprising a storage unit configured to store the setting information of the first display device,
The above setting information,
A data transmission device comprising at least one of information on an input signal of the first display device, volume setting information, and image quality setting information. The method of claim 1,
The control unit,
When a signal indicating that a user is detected is received from a sensor provided in the second display device, it is determined whether the second display device is in an active state based on state information of the second display device, and the second When the display device is in an active state, controlling to transmit setting information of the first display device to the second display device. The method of claim 1,
The control unit,
A reception error rate for the data stream transmitted to the second display device is calculated, and when the reception error rate is greater than or equal to a reference value, beamforming is performed on the second display device based on location information of the second display device. That, the data transmission device. A method of wirelessly transmitting data by a wireless data transmission device in a wireless audio video (AV) system,
Obtaining status information of a corresponding display device from at least one of a plurality of display devices;
Receiving information instructing continuous viewing from a first display device among the plurality of display devices; And
When a user is recognized by a second display device among the plurality of display devices, transmitting setting information of the first display device to the second display device
Containing, data transmission method. The method of claim 8,
The status information,
And at least one of activation/deactivation information, received signal strength information, volume setting information, and image quality setting information of the corresponding display device. The method of claim 9,
The obtaining step,
Transmitting a status information request packet to the corresponding display device; And
Receiving a response packet to the status information request packet from the display device,
When the response packet is not received from the display device, the wireless data transmission device determines that the display device is in an inactive state. The method of claim 8,
Before the receiving step,
Receiving a signal regarding deactivation of the first display device from the first display device; And
And controlling the first display device to display a screen regarding whether or not to continuously watch. The method of claim 8,
After the receiving step,
Further comprising the step of storing the setting information of the first display device,
The above setting information,
And at least one of information on an input signal of the first display device, volume setting information, and image quality setting information. The method of claim 8,
The transmitting step,
Receiving a signal indicating that a user is detected from a sensor provided in the second display device; And
And determining whether the second display device is in an active state based on state information of the second display device. The method of claim 8,
After the transmitting step,
Transmitting a data stream to the second display device;
Calculating a reception error rate of the second display device for the data stream; And
And performing beamforming on the second display device based on location information of the second display device when the reception error rate is greater than or equal to a reference value.

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