A / V transmission device and wireless display system

Abstract

According to an embodiment of the present disclosure, an A / V transmission device may include: an RF transmission module, which sends compressed RF packets to an RF (Radio Frequency) receiving module of an A / V receiving device, wherein the RF transmission module includes a plurality of transmitting antennas; and a processor, which obtains wireless performance between the RF transmission module and the RF receiving module, and if the obtained wireless performance meets the preset wireless performance, turns off one or more of the plurality of transmitting antennas in turn.

Description

Technical Field

[0001] The present disclosure relates to a wireless display system for transmitting and receiving A / V (AUDIO / VIDEO) data in a wireless manner. Background Art

[0002] As imaging technology has changed from analog to digital, it has evolved from standard definition (SD) to high definition (HD) to provide images that are closer to the actual picture. SD supports a resolution of 704×480, consisting of approximately 350,000 pixels, and HD is divided into high definition (HD) and full high definition (Full HD). In the case of Full HD, which supports a higher resolution, it supports a resolution of 1920×1080, consisting of 2 million pixels, thereby providing images with significantly higher quality than the SD.

[0003] Recent imaging technology is moving beyond Full HD and further developing into Ultra High Definition (UHD), and UHD, which supports ultra-high image quality and ultra-high resolution, is attracting attention as the next-generation media environment. UHD supports 4K (3840×2160) and 8K (7680×4320) resolutions and up to 22.2-channel surround audio. Even with 4K UHD as a benchmark, UHD as described above can provide image quality that is 4 times clearer than HD, and in the case of 8K UHD, it can provide image quality that is 16 times clearer than HD.

[0004] In recent years, wireless display systems have emerged that wirelessly transmit such high-resolution images to a display device.

[0005] The wireless display system is a system that transmits and receives A / V data between an A / V transmission device and an A / V reception device through a local area network.

[0006] The A / V receiving device displays the A / V data received from the A / V transmitting device.

[0007] In wireless display systems, A / V data is transmitted via an antenna, so preventing power consumption is an important issue.

[0008] In the prior art, in order to reduce power consumption, power can be reduced indirectly by increasing the compression rate, changing the amount of transmitted data, or reducing the brightness.

[0009] However, the existing technology has the following problems: the method of indirectly reducing the set power consumption by adjusting the data volume or reducing the screen brightness provides users with additional degradation factors such as image quality loss, and cannot reduce the power consumption of the wireless communication device itself. Summary of the invention

[0010] Problems to be solved by the invention

[0011] An object of the present disclosure is to reduce power consumed by an antenna according to an environment between a transmitting device and a receiving device in a wireless display system.

[0012] An object of the present disclosure is to prevent unnecessary antenna power consumption while maintaining wireless performance in a wireless display system.

[0013] Technical solutions to the problem

[0014] According to an embodiment of the present disclosure, an A / V transmission device may include: an RF transmission module, which sends a compressed RF packet to a radio frequency (RF: Radio Frequency) receiving module of an A / V receiving device, and the RF transmission module includes a plurality of transmitting antennas; and a processor, which obtains wireless performance between the RF transmission module and the RF receiving module, and if the obtained wireless performance meets preset wireless performance, turns off one or more of the plurality of transmitting antennas in turn.

[0015] According to an embodiment of the present disclosure, a wireless display system may include: an A / V transmission device, which includes an RF transmission module having a plurality of transmitting antennas; and an A / V receiving device, which measures the wireless performance between the RF transmission module and the RF receiving module, and sends the measured wireless performance to the A / V transmission device. If the received wireless performance meets the preset wireless performance, the A / V transmission device may turn off one or more of the plurality of transmitting antennas in turn.

[0016] Effects of the Invention

[0017] According to an embodiment of the present disclosure, the number of activated antennas is adjusted according to wireless performance between a transmitter and a receiver, thereby being able to prevent power consumption.

[0018] In addition, according to the embodiments of the present disclosure, in the case where the wireless performance between the transmitter and the receiver maintains the reference wireless performance, the number of antennas to be activated is minimized, thereby being able to prevent unnecessary power waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 to Figure 2 It is a diagram for explaining the configuration of a display system according to an embodiment of the present disclosure.

[0020] Figure 3 This is a block diagram illustrating the configuration of a remote control device according to an embodiment of the present disclosure.

[0021] Figure 4It is a diagram for explaining the configuration of an RF transmission module and an RF reception module according to an embodiment of the present disclosure.

[0022] Figure 5 It is a ladder diagram for explaining the operation method of the wireless display system according to one embodiment of the present disclosure.

[0023] Figure 6 The flowchart is a flowchart illustrating a process of selecting a transmitting antenna to be turned off from a plurality of transmitting antennas included in an RF transmission module according to an embodiment of the present disclosure.

[0024] Figure 7 and Figure 8 is a diagram illustrating an angle formed between an RF transmission module and an RF reception module according to an embodiment of the present disclosure.

[0025] Fig. 9 2 is a diagram illustrating a process of selecting a transmitting antenna farthest from a reference receiving antenna among a plurality of transmitting antennas according to an embodiment of the present disclosure.

[0026] Fig.10 and Fig.11 It is a diagram illustrating a process of sequentially shutting down transmitting antennas when the angle between the RF transmission module and the RF receiving module is a predetermined angle according to an embodiment of the present disclosure.

[0027] Fig.12 FIG. 2 is an example of changing the number of transmission antennas to be turned off according to the measured RSSI. DETAILED DESCRIPTION

[0028] The following will describe the embodiments related to the present disclosure in more detail with reference to the accompanying drawings. The suffixes "module" and "unit" used in the following description are only given or used interchangeably for the convenience of writing the specification, and they themselves have no different meanings or functions.

[0029] The image / audio (hereinafter referred to as A / V) sending device of the embodiment of the present disclosure is, for example, an intelligent device that adds a computer support function to the broadcast receiving function. While being faithful to the broadcast receiving function, it adds Internet functions, etc., so that it can have a more user-friendly interface such as a handwriting input device, a touch screen or a space remote control.

[0030] In addition, since a wired or wireless Internet function is supported, it is connected to the Internet and a computer, thereby being able to perform functions such as e-mail, web browsing, banking, or games. In order to realize these various functions, a standardized general-purpose OS may be used.

[0031] Therefore, in the A / V transmission device described in the present disclosure, for example, various applications can be freely added or deleted on a general-purpose OS kernel, thereby being able to perform user-friendly various functions.

[0032] Figure 1 to Figure 2 It is a diagram illustrating the configuration of a wireless display system according to an embodiment of the present disclosure.

[0033] Reference Figure 1 , a wireless display system 1 according to an embodiment of the present disclosure includes an A / V transmission device 100 and an A / V reception device 200 .

[0034] The wireless display system 1 may be a system in which the A / V transmission device 100 transmits A / V data to the A / V reception device 200 in a wireless manner, and the A / V reception device 200 outputs the A / V data.

[0035] The A / V transmission device 100 may be a device that encodes images and audios and can wirelessly transmit the encoded content images and audios.

[0036] The A / V transmission device 100 may be a set-top box.

[0037] The A / V transmission device 100 can be connected to an external device such as a set-top box or a USB memory, and can transmit a video signal or an audio signal received from the connected external device to the A / V receiving device 200 .

[0038] The A / V receiving device 200 may be a display device that wirelessly receives encoded images and audios and is capable of decoding the received images and audios.

[0039] The A / V transmission device 100 and the A / V reception device 200 may constitute a video wall display system.

[0040] In a video wall, a display having a thin bezel plays an important role in visualizing content images. In order to realize a thin bezel of a display, it is effective to provide circuits or components for main functions in a separate device with only components that can play a minimum role.

[0041] The A / V transmission device 100 can determine the type of content image input from the outside, and can determine the compression rate of the content image based on the determined type. The compression rate of the content image can be defined as the ratio of the size of the image data before encoding to the size of the image data after encoding.

[0042] The types of content images may include a still image type, a general video type, and a game video type.

[0043] The A / V transmission device 100 may compress the content image according to the determined compression rate, and may wirelessly transmit the compressed content image to the A / V reception device 200 .

[0044] The A / V receiving device 200 may restore the compressed content image received from the A / V transmitting device 100 and may display the restored content image on a display.

[0045] Figure 2 1 is a block diagram illustrating the detailed configuration of the A / V transmission device 100 and the A / V reception device 200.

[0046] Reference Figure 2 , the A / V transmission device 100 may include a microphone 110 , a Wireless Fidelity (Wi-Fi) module 120 , a Bluetooth module 130 , a memory 140 , an RF transmission module 150 , and a processor 190 .

[0047] The microphone 110 may receive an audio signal and transmit the received audio signal to the processor 190 .

[0048] The microphone 110 can receive the voice uttered by the user.

[0049] The Wi-Fi module 120 may perform wireless communication through the Wi-Fi standard. The Wi-Fi module 120 may perform wireless communication with an external device or the A / V receiving apparatus 200 through the Wi-Fi standard.

[0050] The Bluetooth module 130 may perform wireless communication via the Bluetooth Low Energy (BLE) standard.

[0051] The Bluetooth module 130 can perform wireless communication with an external device such as a remote controller or the A / V receiving device 200 through the Bluetooth Low Energy (BLE) standard.

[0052] The memory 140 may store programs for signal processing and control, and may store processed image, voice, or data signals.

[0053] The memory 140 may perform a function for temporarily storing an image, voice, or data signal input from the outside, and may also store information on a prescribed image through a channel storage function.

[0054] The RF transmission module 150 may transmit the A / V signal to the RF receiving module 240 of the A / V receiving device 200 through RF (Radio Frequency) communication.

[0055] The RF transmission module 150 may include more than one antenna.

[0056] The RF transmission module 150 may transmit the compressed A / V signal in a digital form to the RF reception module 240 .

[0057] The RF transmission module 150 may send the A / V signal to the RF reception module 240 through one or more channels.

[0058] The processor 190 may control the overall operation of the A / V transmission device 100. The processor 190 may be configured in the form of a system on chip (SoC).

[0059] The processor 190 may be provided in plural number.

[0060] The processor 190 may compress an image signal or an audio signal input from the outside, and may transmit the compressed signal to the RF transmission module 150 .

[0061] The processor 190 may include an encoder for compressing an image signal or an audio signal.

[0062] The processor 190 may be named a main SoC.

[0063] The processor 190 may include one or more interfaces for connecting with external devices. For example, the processor 190 may include one or more HDMI ports and one or more USB ports.

[0064] The processor 190 may also include a tuner that receives broadcast signals.

[0065] The A / V receiving device 200 may include a Wi-Fi module 210 , a Bluetooth module 220 , an IR module 230 , an RF receiving module 240 , a memory 250 , a display 260 , and a microcomputer 290 .

[0066] The Wi-Fi module 210 may perform wireless communication through the Wi-Fi standard.

[0067] The Wi-Fi module 210 may perform wireless communication with an external device or the A / V transmission apparatus 100 through the Wi-Fi standard.

[0068] The Bluetooth module 220 may perform wireless communication via the Bluetooth Low Energy (BLE) standard.

[0069] The Bluetooth module 220 can perform wireless communication with an external device such as a remote controller or the A / V transmission device 100 through the Bluetooth Low Energy (BLE) standard.

[0070] The IR module 230 may receive a signal from a remote controller 300 described later through infrared (IR) communication.

[0071] The RF receiving module 240 may receive the A / V signal from the RF transmitting module 150 .

[0072] The RF receiving module 240 may include a plurality of antennas and may be disposed at a lower end of the display 260 .

[0073] The RF receiving module 240 may include a first antenna module and a second antenna module. The first antenna module and the second antenna module may each include a plurality of antennas.

[0074] The RF receiving module 240 may receive the compressed A / V signal in a digital form from the RF transmitting module 150 , and may transmit the received A / V signal to a microcomputer 290 .

[0075] The memory 250 may store a program for signal processing and control, and may store processed image, voice or data signals.

[0076] The display 260 may display an image signal received from the microcomputer 290 .

[0077] The display 260 may display an image signal according to the driving of a timing controller (not shown).

[0078] The microcomputer 290 may control the overall operation of the display device 200 .

[0079] The microcomputer 290 may restore the compressed A / V signal received by the RF receiving module 240. To this end, the microcomputer 290 may include a decoder.

[0080] Figure 3 This is a block diagram illustrating the configuration of a remote control device according to an embodiment of the present disclosure.

[0081] Reference Figure 3 The remote control device 300 may include a wireless communication interface 310 , a user input interface (Interface) 330 , a memory 350 , and a controller 390 .

[0082] The wireless communication interface 310 may be an interface for performing wireless communication with the A / V transmission device 100 or the A / V reception device 200 .

[0083] The wireless communication interface 310 may include a Bluetooth Low Energy (BLE) module 311 and an IR (InfraRed) module 313 .

[0084] The BLE module 311 may transmit a signal for controlling the action of the A / V transmission device 100 to the A / V transmission device 100 .

[0085] The BLE module 311 may transmit a signal for triggering a pairing operation of the A / V transmission device 100 to the A / V transmission device 100 .

[0086] The user input interface 330 may be composed of a keyboard, buttons, a touch pad, or a touch screen.

[0087] The user input interface 330 may generate a control command for controlling the operation of the A / V transmission device 100 or the A / V reception device 200 according to an operation command of a user.

[0088] When the user input interface 330 is provided with a hard key button, the user can operate the hard key by pressing the hard key button.

[0089] The user input interface 330 may include various types of input devices such as a scroll key or a rocker key that can be operated by a user.

[0090] The memory 350 may store a program for the actions of the controller 390 and may also temporarily store input / output data.

[0091] Controller 390 controls actions related to the application programs, and generally controls the overall actions of remote control device 300 .

[0092] Figure 4 It is a diagram for explaining the configuration of an RF transmission module and an RF reception module according to an embodiment of the present disclosure.

[0093] Reference Figure 4 The RF transmission module 150 included in the A / V transmission device 100 may include a baseband chip 151 , an RF IC chip 153 , and a transmitting antenna module 155 .

[0094] In yet another embodiment, the baseband chip 151 may also be included in the processor 190. In this case, the RF transmission module 150 may only include the RF IC chip 153 and the transmitting antenna module 155.

[0095] The baseband chip 151 may transmit a control signal for controlling the operation of the RF IC chip 153 .

[0096] The baseband chip 151 may transmit a control signal for controlling the operation of the antenna to the RF IC chip 153 .

[0097] The baseband chip 151 may transmit the control signal to the RF IC chip 153 through the coaxial cable.

[0098] The RF transmission module 150 may include only the RF IC chip 153 and the transmitting antenna module 155 .

[0099] The RF IC chip 153 may include a plurality of RF IC elements 153 - 1 to 153 - n respectively corresponding to a plurality of transmitting antennas 155 - 1 to 155 - n described later.

[0100] Each of the plurality of RF IC elements 153 - 1 to 153 - n may transmit a turn-on control signal or a turn-off control signal to each of the plurality of transmit antennas 155 - 1 to 155 - n , respectively.

[0101] That is, each RF IC circuit may transmit a turn-on control signal for turning on a transmission antenna corresponding to itself or a turn-off signal for turning off the transmission antenna.

[0102] Each transmitting antenna may be turned on according to a turn-on control signal received from an RF IC circuit corresponding thereto, or may be turned off according to a turn-off control signal.

[0103] The antenna being turned on may be a state where the antenna is powered and can transmit A / V data.

[0104] The antenna being turned off may be a state in which power supply that can be used to transmit A / V data is cut off.

[0105] The transmit antenna module 155 may include a plurality of transmit antennas 155 - 1 to 155 - n .

[0106] The transmit antenna module 155 may include 32 transmit antennas, but this is only an example. The 32 transmit antennas may be arranged in a matrix structure.

[0107] The transmitting antenna module 155 may transmit the compressed A / V signal to the RF receiving module 240 in a wireless manner.

[0108] As the number of turned-on antennas increases, the intensity of transmission power consumed in the transmission of A / V data may increase.

[0109] As the number of antennas turned off increases, the intensity of transmission power consumed in the transmission of A / V data may decrease.

[0110] That is, the number of antennas turned on may be related to the strength of the transmission power of the A / V data.

[0111] The baseband chip 151 may determine the antenna to be turned on based on the wireless environment. The wireless environment may become different depending on the distance, angle, presence or absence of obstacles between the A / V transmission device 100 and the A / V reception device 200.

[0112] The baseband chip 151 may determine an antenna to be turned on among the transmitting antennas according to the wireless performance between the A / V transmitting device 100 and the A / V receiving device 200 .

[0113] This will be described in detail later.

[0114] Figure 5 It is a ladder diagram for explaining the operation method of the wireless display system according to one embodiment of the present disclosure.

[0115] In the following, using Figures 1 to 4 The embodiment of the present invention illustrates the operation method of the wireless display system.

[0116] Reference Figure 5 , the processor 190 of the A / V transmission device 100 selects any one transmitting antenna from the plurality of transmitting antennas 155-1 to 155-n (S501).

[0117] In one embodiment, the processor 190 may select a transmit antenna to be turned off from among the plurality of transmit antennas 155 - 1 to 155 - n .

[0118] The processor 190 may select the transmitting antenna to be turned off based on any one or more of the distance and the angle between the RF transmission module 150 and the RF reception module 240 .

[0119] The processor 190 may select a transmitting antenna that will not affect the wireless performance. Not affecting the wireless performance means that there will be no delay or omission in the transmission process of the A / V data.

[0120] In step S501, the case of turning off one transmitting antenna is described, but this is only an example, and when the plurality of transmitting antennas 155-1 to 155-n are divided into a predetermined number of groups, any one group may be turned off.

[0121] Reference Figure 6 A description is given of a process of selecting a transmission antenna to be turned off from among the plurality of transmission antennas 155-1 to 155-n.

[0122] Figure 6 The flowchart is a flowchart illustrating a process of selecting a transmitting antenna to be turned off from a plurality of transmitting antennas included in an RF transmission module according to an embodiment of the present disclosure.

[0123] Reference Figure 6 , the processor 190 of the A / V transmission device 100 obtains an angle formed between the RF transmission module 150 and the RF reception module 240 (S601).

[0124] The processor 190 may measure the angle of a beam transmitted from the RF transmission module 150 to the RF reception module 240. Specifically, the processor 190 may measure the angle of a beam transmitted from any one of the transmission antennas included in the RF transmission module 150 to the RF reception module 240.

[0125] The processor 190 may obtain the measured angle of the beam as an angle formed between the RF transmission module 150 and the RF reception module 240 .

[0126] In yet another embodiment, the microcomputer 290 of the A / V receiving device 200 may measure the angle of the beam received by the RF receiving module 240 from the RF transmitting module 150. The microcomputer 290 may transmit the measured angle of the beam to the A / V transmitting device 100.

[0127] The microcomputer 290 may transmit the measured angle of the beam to the A / V transmission device 100 through the Bluetooth module 220 , the Wi-Fi module 210 , and the RF receiving module 240 .

[0128] The processor 190 of the A / V transmission device 100 determines whether the obtained angle is a predetermined angle (S603).

[0129] In one embodiment, the predetermined angle may be 0 degrees, but this is only an example, and may also be an angle within a predetermined range greater than 0 degrees. The predetermined angle may be a size within a predetermined range.

[0130] Figure 7 and Figure 8 is a diagram illustrating an angle formed between an RF transmission module and an RF reception module according to an embodiment of the present disclosure.

[0131] Figure 7 The angle formed by the RF transmission module 150 and the RF receiving module 240 is 0 degrees. Figure 8 The case where the angle formed by the RF transmission module 150 and the RF reception module 240 is a degree which is greater than 0 degree is shown.

[0132] The A / V transmission device 100 may obtain the angle of the beam transmitted by the RF transmission module 150 to the RF reception module 240 as an angle formed by the RF transmission module and the RF reception module.

[0133] Again Figure 6 .

[0134] In a case where the obtained angle is not the predetermined angle, the processor 190 of the A / V transmission device 100 obtains a distance between each of the plurality of transmission antennas 155 - 1 to 155 - n and the RF reception module 240 ( S605 ).

[0135] In a case where the obtained angle is not a predetermined angle, the processor 190 may obtain a distance between each of the plurality of transmitting antennas 155 - 1 to 155 - n and any one receiving antenna included in the RF receiving module 240 .

[0136] The receiving antenna included in the RF receiving module 240 as a distance measurement reference may be the most central antenna among the plurality of receiving antennas 240-1 to 240-n in a matrix structure included in the RF receiving module 240. The most central antenna may be named a reference receiving antenna.

[0137] The processor 190 may control each of the plurality of transmit antennas 155-1 to 155-n to transmit a beam to the reference receive antenna in sequence. The processor 190 may store in advance the speed of the transmit beam.

[0138] The processor 190 may measure the time it takes for a beam emitted by each transmit antenna to pass through the reference receive antenna and return again to the transmit antenna itself.

[0139] The processor 190 may measure the distance between the transmit antenna and the reference receive antenna by dividing the velocity of the beam by the measured time.

[0140] The processor 190 of the A / V transmission device 100 selects the transmitting antenna located at the farthest distance among the obtained plurality of distances as the antenna to be turned off (S607).

[0141] Fig. 9 2 is a diagram illustrating a process of selecting a transmitting antenna farthest from a reference receiving antenna among a plurality of transmitting antennas according to an embodiment of the present disclosure.

[0142] Reference Fig. 9 , assuming that the distance d between the first transmitting antenna 155 - 1 included in the RF transmitting antenna module 155 and the reference receiving antenna 240 - 10 included in the RF receiving module 240 is the farthest.

[0143] The processor 190 may select the first transmitting antenna 155 - 1 as the antenna to be turned off.

[0144] Again Figure 6 .

[0145] On the other hand, in the case where the acquired angle is 0 degrees, the processor 190 of the A / V transmission device 100 selects the transmitting antennas arranged at the outermost periphery among the plurality of transmitting antennas 155-1 to 155-n as antennas to be turned off (S609).

[0146] The processor 190 may select any one of the plurality of transmit antennas 155 - 1 to 155 - n having a matrix structure around the periphery as an antenna to be turned off.

[0147] This will be described in detail later.

[0148] Again Figure 5 .

[0149] The processor 190 of the A / V transmission device 100 turns off the selected transmission antenna (S503).

[0150] The processor 190 may not supply power to the selected transmitting antenna, thereby turning off the selected antenna.

[0151] Specifically, the baseband chip 151 may send a power off signal to the RF IC element corresponding to the selected transmitting antenna. The RF IC element may turn off the matched transmitting antenna according to the received power off signal. The RF IC element may cut off the power supply to the matched transmitting antenna according to the received power off signal.

[0152] The processor 190 of the A / V transmission device 100 obtains the wireless performance between the RF transmission module 150 and the RF reception module 240 after turning off the selected transmission antenna (S505).

[0153] In one embodiment, the wireless performance may be one or more of a received signal strength indicator (RSSI) and a signal-to-noise ratio (SNR).

[0154] The microcomputer 290 of the A / V receiving device 200 may measure the RSSI of the signal received from the RF transmission module 150 , and may transmit the measured RSSI to the A / V transmission device 100 .

[0155] The microcomputer 290 may feed back the measured RSSI to the A / V transmission device 100 through the RF receiving module 240 .

[0156] The microcomputer 290 of the A / V receiving device 200 may measure the SNR based on the signal received from the RF transmission module 150. The microcomputer 290 may obtain the SNR by measuring the power of the signal relative to the power of the noise signal.

[0157] The microcomputer 290 may feed back the measured SNR to the A / V transmission device 100 through the RF receiving module 240 .

[0158] The processor 190 of the A / V transmission device 100 determines whether the obtained wireless performance is equal to or higher than a preset wireless performance (S507).

[0159] In one embodiment, when the RSSI is greater than a preset first value, the processor 190 may determine that the wireless performance is greater than a preset wireless performance.

[0160] In yet another embodiment, when the SNR is greater than a preset second value, the processor 190 may determine that the wireless performance is greater than a preset wireless performance.

[0161] In yet another embodiment, when the RSSI is greater than a preset first value and the SNR is greater than a preset second value, the processor 190 may determine that the wireless performance is greater than a preset wireless performance.

[0162] In one embodiment, when the RSSI is less than a preset first value, the processor 190 may determine that the wireless performance is less than a preset wireless performance.

[0163] In yet another embodiment, when the SNR is less than a preset second value, the processor 190 may determine that the wireless performance is less than a preset wireless performance.

[0164] In yet another embodiment, when the RSSI is less than a preset first value and the SNR is less than a preset second value, the processor 190 may determine that the wireless performance is less than a preset wireless performance.

[0165] When the processor 190 of the A / V transmission device 100 determines that the obtained wireless performance is less than the preset wireless performance, the selected transmitting antenna is turned on (S509).

[0166] In this case, the processor 190 may control the turned-off transmitting antenna to be turned on again to obtain a normal data rate.

[0167] The processor 190 of the A / V transmitting device 100 transmits the compressed RF packet to the RF receiving module 240 of the A / V receiving device 200 through the RF transmitting module 150 (S511).

[0168] The microcomputer 290 of the A / V receiving device 200 restores the compressed RF packet and outputs the restored A / V data (S513).

[0169] On the other hand, when the obtained wireless performance is equal to or higher than the preset wireless performance, the processor 190 of the A / V transmission device 100 may execute step S501.

[0170] That is, the processor 190 may select another transmitting antenna to be turned off after turning off a pre-selected transmitting antenna.

[0171] The processor 190 may turn off the transmitting antennas in sequence to determine whether the wireless performance meets the preset wireless performance. This is because if the wireless performance is maintained even if a predetermined number of transmitting antennas are turned off, power can be saved by turning off the transmitting antennas.

[0172] In one embodiment, the processor 190 may select a transmitting antenna that is most adjacent to the selected transmitting antenna.

[0173] In yet another embodiment, the processor 190 may select a transmission antenna corresponding to a maximum distance among distances other than the distance between the transmission antenna and the reference reception antenna that has been set.

[0174] Fig.10 and Fig.11 It is a diagram illustrating a process of sequentially shutting down transmitting antennas when the angle between the RF transmission module and the RF receiving module is a predetermined angle according to an embodiment of the present disclosure.

[0175] Reference Fig.10 and Fig.11 , showing a matrix structure of the RF transmitting antenna module 155.

[0176] The number of transmit antennas included in the RF transmit antenna module 155 may be 32, but this is just an example.

[0177] The transmission antennas arranged in each row may be arranged to be spaced apart from each other by a predetermined interval.

[0178] The transmitting antennas arranged in each column may be arranged to be spaced apart from each other by a predetermined interval.

[0179] Each transmission antenna may have a quadrilateral shape, but this is just an example.

[0180] When the angle between the RF transmission module 150 and the RF reception module 240 is a predetermined angle (e.g., 0 degrees), the processor 190 of the A / V transmission device 100 may select any one of the antennas configured along the first antenna path 1000 from the plurality of transmitting antennas 155-1 to 155-n.

[0181] For example, the processor 190 may select the first transmitting antenna 155-1 located on the first antenna path 1000 in the clockwise direction as the antenna to be turned off. However, this is only an example, and any antenna configured along the first antenna path 1000 may be selected as the transmitting antenna.

[0182] After turning off the first transmitting antenna 155-1, the processor 190 obtains wireless performance. If the obtained wireless performance meets the preset wireless performance, the second transmitting antenna 155-2 adjacent to the first transmitting antenna 155-1 can be selected as the next antenna to be turned off.

[0183] After turning off the first transmitting antenna 155 - 1 and the second transmitting antenna 155 - 2 , the processor 190 obtains wireless performance, and turns off the next transmitting antenna when the obtained wireless performance meets the preset wireless performance.

[0184] If the wireless performance obtained by the processor 190 after turning off the first transmitting antenna 155-1 and the second transmitting antenna 155-2 does not meet the preset wireless performance, the second transmitting antenna 155-2 may be turned on because the wireless quality required for the transmission of A / V data is not met.

[0185] Fig.11 This may represent an embodiment where the transmitting antennas are sequentially turned off along the second antenna path 1100 in the counterclockwise direction.

[0186] As described above, according to the embodiments of the present disclosure, when the angle between the RF transmission module 150 and the RF receiving module 240 forms a predetermined angle, the transmitting antennas arranged at the outermost periphery may be turned off in sequence to determine whether the wireless performance is met.

[0187] Thus, by turning off an antenna that does not affect wireless transmission performance, it is possible to prevent power consumption supplied to the turned-off antenna.

[0188] Fig.12 FIG. 2 is an example of changing the number of transmission antennas to be turned off according to the measured RSSI.

[0189] exist Fig.12 In the example, it is assumed that the RSSI of the wireless performance is set to 5dBm.

[0190] That is, if the RSSI remains above 5dBm, the transmit antennas may be turned off in turn.

[0191] As the RSSI changes, the display 260 of the A / V receiving device 200 may display the number of enabled transmitting antennas and the number of disabled transmitting antennas.

[0192] Specifically, the first UI 1210 indicates that the RSSI is 10 dBm, the number of enabled transmitting antennas is 20, and the number of disabled transmitting antennas is 12.

[0193] The second UI 1220 indicates that the RSSI is 8 dBm, the number of enabled transmit antennas is 18, and the number of disabled transmit antennas is 14. That is, although the RSSI decreases from 10 dBm to 8 dBm, the number of disabled transmit antennas increases from 12 to 14 because the reference RSSI is above 5 dBm.

[0194] That is, if the wireless transmission performance meets a predetermined level, power consumption can be reduced by turning off the transmission antenna.

[0195] The third UI 1230 indicates that the RSSI is 4 dBm, the number of enabled transmit antennas is 16, and the number of disabled transmit antennas is 16. That is, the RSSI is 4 dBm, which is smaller than 5 dBm, which is a reference RSSI.

[0196] The fourth UI 1240 indicates that the RSSI is 0 dBm, the number of enabled transmitting antennas is 16, and the number of disabled transmitting antennas is 16. Since the RSSI is 4 dBm, which is less than 5 dBm, which is the reference RSSI, the number of disabled transmitting antennas does not change. This is to stably transmit A / V data by maintaining the minimum wireless quality.

[0197] In yet another embodiment, when the wireless performance meets the preset wireless performance, the process of shutting down the transmitting antenna can be confirmed by a thermal imaging camera.

[0198] When the transmitting antenna is turned on and when the transmitting antenna is turned off, the infrared energy of the area where the transmitting antenna is configured may be different from each other. Accordingly, when the wireless performance meets the preset wireless performance and the transmitting antennas are turned off one by one, the change of infrared energy can be observed by the thermal imaging camera.

[0199] According to an embodiment of the present disclosure, the above method can be implemented with processor-readable code on a medium having a program recorded thereon. Examples of processor-readable media include ROM (read-only memory), RAM (random access memory), CD-ROM (disc-ROM), magnetic tape, floppy disk, optical data storage device, etc.

[0200] The A / V transmission device described above is not limited to the configuration and method of the above-described embodiments, and can be configured by selectively combining all or part of the embodiments to make various modifications.

Claims

1. An A / V transmission device, wherein: include: An RF transmission module, which sends a compressed RF packet to an RF receiving module of the A / V receiving device, wherein the RF transmission module includes a plurality of transmitting antennas; and The processor obtains the wireless performance between the RF transmission module and the RF receiving module, and if the obtained wireless performance meets the preset wireless performance, sequentially shuts down at least one of the plurality of transmitting antennas, The plurality of transmitting antennas are configured in a matrix structure, The processor obtains an angle formed between the RF transmission module and the RF reception module, and if the obtained angle is a predetermined angle, sequentially turns off at least one of the plurality of transmitting antennas that are arranged at the outermost periphery.

2. The A / V transmission device according to claim 1, wherein: The wireless performance includes any one or more of a received signal strength indicator and a signal-to-noise ratio.

3. The A / V transmission device according to claim 1, wherein: After turning off a first transmitting antenna among the plurality of transmitting antennas, the processor turns off a second transmitting antenna among the plurality of transmitting antennas if the measured wireless performance meets the preset wireless performance.

4. The A / V transmission device according to claim 3, wherein: After turning off the first transmitting antenna and the second transmitting antenna, the processor turns on the second transmitting antenna among the plurality of transmitting antennas if the measured wireless performance does not meet the preset wireless performance.

5. The A / V transmission device according to claim 1, wherein: The processor obtains an angle formed between the RF transmission module and the RF receiving module, and if the obtained angle exceeds a predetermined angle, shuts down a transmitting antenna farthest from a reference receiving antenna included in the RF receiving module from among the plurality of transmitting antennas.

6. The A / V transmission device according to claim 1, wherein: The RF transmission module further includes an RF IC chip, wherein the RF IC chip includes a plurality of RF IC elements transmitting an on signal or an off signal to each of the plurality of transmitting antennas.

7. A wireless display system, wherein: include: The A / V transmission device includes an RF transmission module having a plurality of transmitting antennas; and an A / V receiving device, measuring the wireless performance between the RF transmission module and the RF receiving module, and sending the measured wireless performance to the A / V transmission device, If the received wireless performance meets the preset wireless performance, the A / V transmission device sequentially turns off at least one of the plurality of transmitting antennas. The plurality of transmitting antennas are configured in a matrix structure, The A / V transmission device obtains an angle formed between the RF transmission module and the RF receiving module, and if the obtained angle is a predetermined angle, one or more transmitting antennas arranged at the outermost periphery of the plurality of transmitting antennas are sequentially turned off.

8. The wireless display system according to claim 7, wherein: The wireless performance includes any one or more of a received signal strength indicator and a signal-to-noise ratio.

9. The wireless display system according to claim 7, wherein: After turning off the first transmitting antenna among the plurality of transmitting antennas, the A / V transmission device turns off the second transmitting antenna among the plurality of transmitting antennas if the measured wireless performance meets the preset wireless performance.

10. The wireless display system according to claim 9, wherein: After turning off the first transmitting antenna and the second transmitting antenna, the A / V transmission device turns on the second transmitting antenna among the plurality of transmitting antennas if the measured wireless performance does not meet the preset wireless performance.

11. The wireless display system according to claim 7, wherein: The A / V transmission device obtains the angle formed between the RF transmission module and the RF receiving module, and if the obtained angle exceeds a predetermined angle, shuts down the transmitting antenna farthest from the reference receiving antenna included in the RF receiving module from among the plurality of transmitting antennas.

12. The wireless display system according to claim 7, wherein: The A / V receiving device also includes a display, The display displays a UI including measured wireless performance, the number of turned-on transmit antennas and the number of turned-off transmit antennas among the plurality of transmit antennas.

13. The wireless display system according to claim 12, wherein: When the measured wireless performance is greater than the preset wireless performance, the number of the turned-on transmitting antennas and the number of the turned-off transmitting antennas are changed, In a case where the measured wireless performance is less than the preset wireless performance, the number of the turned-on transmitting antennas and the number of the turned-off transmitting antennas are fixed.

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