Display device and control method thereof

Abstract

A display device is disclosed. This display device comprises: a first antenna unit configured to perform wireless communication with an external device; a first RF circuit configured to transmit and receive a signal through the first antenna unit; a second antenna unit configured to perform wireless communication with a set-top box; a second RF circuit configured to transmit and receive a signal through the second antenna unit; a first switch configured to selectively connect the first antenna unit to the first RF circuit and the second RF circuit; a memory that stores instructions; and at least one processor configured to execute the instructions, wherein the at least one processor identifies the quality of the signal received through the second antenna unit, and controls the first switch such that the first antenna unit is connected to the second RF circuit, when the quality of the signal received through the second antenna unit is less than or equal to a preset reference value.

Description

Display device and control method thereof

[0001] The present disclosure relates to a display device and a control method thereof, and more particularly, to a display device and a control method thereof capable of securing high signal quality during wireless communication connection between the display device, a set-top box, and an external device.

[0002] To display images on a display device, video data can be transmitted via wired connections, using interfaces such as HDMI, USB, or a cable. However, this method of transmitting video data to a display device via wired connections may not be appealing to users due to aesthetic or convenience considerations.

[0003] Therefore, the method of transmitting video data wirelessly to display devices via set-top boxes is gradually increasing.

[0004] Meanwhile, when wirelessly connecting a display device, set-top box, or external device, a minimum transmission rate is required to transmit video data. However, if the signal between the display device and the set-top box or external device does not meet the minimum transmission rate due to various external factors, the display device may have difficulty smoothly receiving video data from the set-top box or external device.

[0005] Some aspects of the present disclosure may be set forth in the following description, and some will be apparent from the description or may be learned by practicing the embodiments presented.

[0006] According to the present disclosure, a display device according to at least one embodiment may include a first antenna unit configured to perform wireless communication with an external device, a first RF circuit configured to transmit and receive signals through the first antenna unit, a second antenna unit configured to perform wireless communication with a set-top box, a second RF circuit configured to transmit and receive signals through the second antenna unit, a first switch configured to selectively connect the first antenna unit to the first RF circuit and the second RF circuit, a memory for storing instructions, and at least one processor configured to execute the instructions. The at least one processor may identify a quality of a signal received through the second antenna unit, and control the first switch to connect the first antenna unit to the second RF circuit to perform wireless communication with the set-top box when the first RF circuit is in a standby state and the quality of the signal received through the second antenna unit is below a preset reference value.

[0007] According to the present disclosure, the display device may further include a first matching circuit disposed between the first switch and the second RF circuit, and controlling the impedance of the first antenna unit to correspond to the frequency of a signal received from the set-top box.

[0008] Additionally, the display device may further include a second switch disposed between the first matching circuit and the second RF circuit and configured to selectively connect a wire connected from the first antenna unit to the second RF circuit. The at least one processor may control the second switch to disconnect a wire connected from the first antenna unit to the second RF circuit when the first antenna unit is connected to the first RF circuit.

[0009] In addition, the display device may further include an interface configured to receive a user input for performing wireless communication with the set-top box. The at least one processor may control the first switch to switch the first RF circuit to a standby state and connect the first antenna unit to the second RF circuit for performing wireless communication with the set-top box when the signal quality received through the second antenna unit is below a preset reference value and a user input is received through the interface.

[0010] In addition, the display device may further include a third switch configured to selectively connect the second antenna unit to the first RF circuit and the second RF circuit. The at least one processor may identify a quality of a signal received through the first antenna unit, and if the second RF circuit is in a standby state and the quality of the signal received through the first antenna unit is below a second reference value, control the third switch so that the second antenna unit is connected to the first RF circuit to perform wireless communication with the external device.

[0011] The display device may further include a second matching circuit disposed between the third switch and the first RF circuit, and controlling the impedance of the second antenna unit to correspond to the frequency of a signal received from the external device.

[0012] Additionally, the display device may further include a fourth switch disposed between the second matching circuit and the first RF circuit and configured to selectively connect a wire connected from the second antenna unit to the first RF circuit. The at least one processor may control the fourth switch to disconnect a wire connected from the second antenna unit to the first RF circuit when the second antenna unit is connected to the second RF circuit.

[0013] In addition, the display device may further include an interface configured to receive a user input for performing wireless communication with the external device. The at least one processor may control the third switch to switch the second RF circuit to a standby state and connect the second antenna unit to the first RF circuit for performing wireless communication with the external device when the signal quality received through the first antenna unit is below a second reference value and a user input is received through the interface.

[0014] Meanwhile, in a control method of a display device according to one or more embodiments of the present disclosure, the display device may include a first RF circuit configured to perform wireless communication with an external device through a first antenna unit, and a second RF circuit configured to perform wireless communication with a set-top box through a second antenna unit. The control method of the display device may include a step of identifying a quality of a signal received through the second antenna unit, a step of identifying whether the first RF circuit is in a standby state, and a step of connecting the first antenna unit to the second RF circuit so that the first antenna unit performs wireless communication with the set-top box when the first RF circuit is in a standby state and the quality of the signal received through the second antenna unit is below a preset reference value.

[0015] Additionally, the step of connecting the first antenna unit to the second RF circuit may include a step of controlling the impedance of the first antenna unit to correspond to the frequency of a signal received from the set-top box.

[0016] In addition, the control method of the display device may further include a step of receiving a user input for performing wireless communication with the set-top box. The step of connecting the first antenna unit to the second RF circuit may include a step of switching the first RF circuit to the standby state and connecting the first antenna unit to the second RF circuit so that the first antenna unit performs wireless communication with the set-top box when the first RF circuit is not in the standby state and the quality of the signal received through the second antenna unit is below a reference value.

[0017] In addition, the control method of the display device may further include a step of identifying the quality of a signal received through the first antenna unit, a step of identifying whether the second RF circuit is in a standby state, and a step of connecting the second antenna unit to the first RF circuit so that the second antenna unit performs wireless communication with the external device when the second RF circuit is in a standby state and the quality of the signal received through the first antenna unit is below a second reference value.

[0018] The step of connecting the second antenna unit to the first RF circuit may include a step of controlling the impedance of the second antenna unit to correspond to the frequency of a signal received from the external device.

[0019] In addition, the control method of the display device may further include a step of receiving a user input for performing wireless communication with the external device. The step of connecting the second antenna unit to the first RF circuit may include a step of switching the second RF circuit to a standby state and connecting the second antenna unit to the first RF circuit so that the second antenna unit performs wireless communication with the external device when the second RF circuit is in an operating state and the quality of a signal received through the first antenna unit is below a second reference value.

[0020] Meanwhile, in a non-transitory computer-readable recording medium including a program for executing a control method of a display device according to one or more embodiments of the present disclosure, the display device may include a first RF circuit configured to perform wireless communication with an external device through a first antenna unit, and a second RF circuit configured to perform wireless communication with a set-top box through a second antenna unit. The control method may include a step of identifying a quality of a signal received through the second antenna unit, a step of identifying whether the first RF circuit is in a standby state, and a step of connecting the first antenna unit to the second RF circuit so that the first antenna unit performs wireless communication with the set-top box if the first RF circuit is in a standby state and the quality of the signal received through the second antenna unit is below a preset reference value.

[0021] Meanwhile, a display device according to one or more embodiments of the present disclosure may include a first antenna unit configured to perform wireless communication with an external device, a first RF circuit configured to transmit and receive signals through the first antenna unit, a second antenna unit configured to perform wireless communication with a set-top box, a second RF circuit configured to transmit and receive signals through the second antenna unit, a third switch configured to selectively connect the second antenna unit to the first RF circuit and the second RF circuit, a memory that stores instructions, and at least one processor configured to execute the instructions. The at least one processor may identify a quality of a signal received through the first antenna unit, and control the third switch to connect the second antenna unit to the first RF circuit to perform wireless communication with the external device when the second RF circuit is in a standby state and the quality of the signal received through the first antenna unit is below a preset second reference value.

[0022] According to the present disclosure, the display device may further include a second matching circuit disposed between the third switch and the first RF circuit, and controlling the impedance of the second antenna unit to correspond to the frequency of a signal received from the external device.

[0023] Additionally, the display device may further include a fourth switch disposed between the second matching circuit and the first RF circuit and configured to selectively connect a wire connected from the second antenna unit to the first RF circuit. The at least one processor may control the fourth switch to disconnect a wire connected from the second antenna unit to the first RF circuit when the second antenna unit is connected to the second RF circuit.

[0024] In addition, the display device may further include an interface configured to receive a user input for performing wireless communication with the external device. The at least one processor may control the third switch to switch the second RF circuit to a standby state and connect the second antenna unit to the first RF circuit for performing wireless communication with the external device when the signal quality received through the first antenna unit is below a second reference value and a user input is received through the interface.

[0025] Specific embodiments, other aspects, features and advantages of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings.

[0026] FIG. 1 is a block diagram showing the configuration of a wireless communication system according to various embodiments of the present disclosure.

[0027] FIG. 2 is a block diagram showing the configuration of a display device according to various embodiments of the present disclosure.

[0028] FIG. 3 is a drawing for explaining a detailed configuration of a display device according to various embodiments of the present disclosure.

[0029] FIGS. 4 to 7 are drawings for explaining the operation of using the first antenna unit as a diversity antenna according to various embodiments of the present disclosure.

[0030] FIGS. 8 to 11 are drawings for explaining an operation of selectively using the first antenna unit and the second antenna unit as a diversity antenna according to various embodiments of the present disclosure.

[0031] FIG. 12 and FIG. 13 are flowcharts for explaining a method of controlling a display device according to various embodiments of the present disclosure.

[0032] The terms used in this specification will be briefly explained, and the present disclosure will be described in detail.

[0033] The terms used in the embodiments of this disclosure have been selected from widely used, current terms, taking into account the functions of this disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the description of the relevant disclosure. Therefore, the terms used in this disclosure should not be defined simply as names of terms, but rather based on the meanings of the terms and the overall content of this disclosure.

[0034] In this specification, expressions such as “has,” “can have,” “includes,” or “may include” indicate the presence of a feature (e.g., a number, function, operation, or component such as a part), and do not exclude the presence of additional features.

[0035] In this disclosure, expressions such as “A or B,” “at least one of A and / or B,” or “one or more of A or / and B” can include all possible combinations of the listed items. For example, “A or B,” “at least one of A and B,” or “at least one of A or B” can all refer to (1) including at least one A, (2) including at least one B, or (3) including both at least one A and at least one B.

[0036] As used herein, the expressions “first,” “second,” “first,” or “second,” etc., may describe various components, regardless of order and / or importance, and are only used to distinguish one component from another, but do not limit the components.

[0037] When it is said that a component (e.g., a first component) is “operatively or communicatively coupled with / to” or “connected to” another component (e.g., a second component), it should be understood that the component may be directly coupled to the other component, or may be connected through another component (e.g., a third component).

[0038] Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "consist of" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0039] In the present disclosure, a "module" or "part" performs at least one function or operation and may be implemented as hardware or software, or as a combination of hardware and software. Furthermore, multiple "modules" or multiple "parts" may be integrated into at least one module and implemented as at least one processor (not shown), excluding any "modules" or "parts" that need to be implemented as specific hardware.

[0040] An embodiment of the present disclosure will be described in more detail with reference to the attached drawings below.

[0041] FIG. 1 is a block diagram showing the configuration of a wireless communication system according to various embodiments of the present disclosure.

[0042] According to FIG. 1, a wireless communication system may include a display device (100), a set-top box (200), a first external device (10) connected to the set-top box (200), and a second external device (20) connected to the display device (100). At this time, the display device (100) is a device that displays video content, and may be a TV, a desktop PC, a laptop, a video wall, a large format display (LFD), a digital signage, a digital information display (DID), a projector display, a digital video disk (DVD) player, a smartphone, a tablet PC, a monitor, smart glasses, a smart watch, etc., and any device that can display an input video may be used. This is only one embodiment and is not limited thereto, and the display device (100) may be implemented as various types of electronic devices.

[0043] In addition, a set-top box (200) may refer to any device that is connected to a display device (100) and transmits a signal input from a first external device (10) to the display device (100). The set-top box (200) may be referred to as an image providing device, and may also be referred to as a set-top unit, STB, STU, etc. in addition to the set-top box (200). In addition, the set-top box (200) may be implemented as an OC box, a DVD player, etc.

[0044] The display device (100) can transmit and receive signals with the second external device (20) using the first antenna unit (110). In this case, the second external device (20) may include an external AP (Access Point). The display device (100) can receive image data from the second external device (20) using a wireless network. The wireless network may include at least one of LTE, LTE-A (LTE Advance), CDMA (code division multiple access), WCDMA (wideband CDMA), UMTS (universal mobile telecommunications system), WiBro (Wireless Broadband), or GSM (Global System for Mobile Communications), WiFi (wireless fidelity), LiFi (light fidelity), Bluetooth, Bluetooth low energy (BLE), Zigbee, near field communication (NFC), Magnetic Secure Transmission, radio frequency (RF), or body area network (BAN).

[0045] For example, when the wireless communication system uses WIFI, the display device (100) can be connected to an external AP (Access Point) in STA (WIFI Station) mode and receive image data from the AP.

[0046] The set-top box (200) is connected to a first external device (10) via a wire or wireless connection, and can transmit and receive signals to and from the display device (100) via a second antenna unit (120) provided in the display device (100). For example, the set-top box (200) can receive image data from the first external device (10) and transmit it to the display device (100).

[0047] The display device (100) can receive image data from a second external device (20) using a wireless network, or can wirelessly receive image data from a set-top box (200) connected to the first external device (10) and display the received image data. For example, the display device (100) can receive image data from a second external device (20) using WIFI7, or can receive image data from a set-top box (200).

[0048] Compared to existing WIFI, WIFI7 uses 4K QAM (Quadrature Amplitude Modulation), a high-performance MCS (Modulation Coding Scheme) to secure a high data transmission rate. WIFI7 applies a wide bandwidth of 320MHz and can provide higher WIFI speeds, more stable WIFI, and shorter delays than WIFI6 by applying multi-link operations (MLO). In addition, WIFI7 can increase the efficiency of orthogonal frequency division multiple access (OFDMA) based on MRU (Multi-Resource Unit) technology. In particular, WIFI7 can provide a very high-performance connection speed compared to existing WIFI based on multi-link operations (MLO).

[0049] Conventional Wi-Fi can only transmit and receive signals by connecting to either the 2.4 GHz or 5 GHz bands. However, Wi-Fi7 can simultaneously connect to the 2.4 GHz, 5 GHz, and 6 GHz bands through multiple link (MLO), thereby increasing data throughput and reducing latency. The display device (100) can also use multiple link (MLO) to simultaneously transmit and receive data through different frequency bands and channels.

[0050] FIG. 2 is a block diagram showing the configuration of a display device according to various embodiments of the present disclosure.

[0051] According to FIG. 2, the display device (100) includes a first antenna unit (110), a second antenna unit (120), a first radio-frequency (RF) module (130), a second RF module (140), a first switching unit (150), and a processor (160). At this time, the first antenna unit (110) may include at least one antenna for performing wireless communication with a second external device (20). For example, when the display device (100) and the second external device (20) are wirelessly connected based on WIFI7, the first antenna unit (110) may include at least one of an antenna of a 2.4 GHz frequency band, an antenna of a 5 GHz frequency band, and an antenna of a 6 GHz frequency band. However, the present invention is not limited thereto, and the first antenna unit (110) may include any number of antennas operating in various frequency bands.

[0052] The first RF module (130) is a configuration for transmitting and receiving a signal using the first antenna unit (110). The first RF module (130) may be referred to as a first RF circuit. The first RF module (130) may process a signal received through the first antenna unit (110) and convert it into image data, or transmit the signal to a second external device (20) using the first antenna unit (110). In this case, the first RF module (130) may include a transceiver, a power amp module (PAM), a frequency filter, a low noise amplifier (LNA), etc. However, the present invention is not limited thereto, and the first RF module (130) may include various devices for processing a signal received through the first antenna unit (110) or transmitting a signal using the first antenna unit (110).

[0053] The second antenna unit (120) is configured to perform wireless communication with the set-top box (200). The second antenna unit (120) may include at least one antenna for transmitting and receiving signals with the set-top box (200). For example, when the display device (100) and the set-top box (200) are wirelessly connected via WIFI7, the second antenna unit (120) may include at least one of an antenna of a 2.4 GHz frequency band, an antenna of a 5 GHz frequency band, and an antenna of a 6 GHz frequency band. However, the present invention is not limited thereto, and the second antenna unit (120) may include any number of antennas operating in various frequency bands.

[0054] The second RF module (140) is configured to transmit and receive signals using the second antenna unit (120). The second RF module (140) may be referred to as a second RF circuit. The second RF module (140) may process a signal received through the second antenna unit (120) and convert it into image data, or transmit the signal to the set-top box (200) using the second antenna unit (120). The second RF module (140) may include a transceiver, a power amp module (PAM), a frequency filter, a low noise amplifier (LNA), etc. However, the present invention is not limited thereto, and the second RF module (140) may include various devices for processing a signal received through the second antenna unit (120) or transmitting a signal using the second antenna unit (120).

[0055] The first switching unit (150) is configured to selectively connect the first antenna unit (110) to the first RF module (130) or the second RF module (140). The first switching unit (150) may include at least one switch arranged between each antenna included in the first antenna unit (110) and the first RF module (130) or the second RF module (140). For example, the first switching unit (150) may be configured using a known SPDT (Single Pole Double Throw).

[0056] The processor (160) is a component that is connected to each component of the display device (100) and controls the overall operation of the display device (100). The processor (160) may be implemented as at least one processor including one or more of a digital signal processor (DSP), a microprocessor, a graphics processing unit (GPU), an artificial intelligence (AI) processor, and a neural processing unit (NPU). However, the present invention is not limited thereto, and may include one or more of a central processing unit (CPU), a micro controller unit (MCU), a micro processing unit (MPU), a controller, an application processor (AP), a communication processor (CP), and an ARM processor, or may be defined by the relevant terminology. Additionally, the processor (160) may be implemented as a SoC (System on Chip) or LSI (large scale integration) with a built-in processing algorithm, or may be implemented in the form of an ASIC (application specific integrated circuit) or an FPGA (field programmable gate array).

[0057] The processor (160) identifies the quality of the signal received through the second antenna unit (120). If the first RF module (130) is in a standby state and the quality of the signal received through the second antenna unit (120) is below a preset reference value, the processor (160) controls the first switching unit (150) so that the first antenna unit (110) is connected to the second RF module (140) to perform wireless communication with the set-top box (200). For example, if the first switching unit (150) is implemented as a single pole double throw (SPDT), the processor (160) can control the first switching unit (150) to disconnect the connection between the first antenna unit (110) and the first RF module (130) and connect the first antenna unit (110) to the second RF module (140).

[0058] In this case, the processor (160) can maintain the connection state between the first antenna unit (110) and the first RF module (130) if the first RF module (130) is in an operating state or the quality of the signal received through the second antenna unit (120) is above a reference value.

[0059] Meanwhile, the processor (160) can identify the quality of the signal based on at least one of the signal throughput, RSSI (Received Signal Strength Indicator), SNR, packet delay, packet loss, or jitter. For example, if the throughput of the signal received through the second antenna unit (120) is lower than or equal to a preset minimum throughput, the processor (160) can control the first switching unit (150) so that the first antenna unit (110) is connected to the second RF module (140) to perform wireless communication with the set-top box (200). If the RSSI of the signal received through the second antenna unit (120) is lower than or equal to a minimum strength, the processor (160) can control the first switching unit (150) so that the first antenna unit (110) is connected to the second RF module (140) to perform wireless communication with the set-top box (200). However, in this disclosure, the description is based on the signal transmission rate (Throughput).

[0060] Here, throughput represents the amount of signal transmitted to the RF module from an external device or set-top box per unit time. RSSI represents the strength of the signal received by the RF module, the strength of the received radio signal, or signal intensity. RSSI represents signal strength as a negative number, with values ​​closer to 0 indicating a stronger signal.

[0061] Packet delay refers to the delay in the time it takes for a signal to be transmitted from the transmitting device to the RF module. Packet loss refers to the loss of packets due to the RF module not receiving the signal transmitted from an external device or set-top box. Signal-to-noise ratio (SNR) refers to the ratio of signal power to noise power of the signal transmitted from an external device or set-top box to the RF module.

[0062] Jitter refers to a condition in which the packet delay of a signal transmitted from an external device or set-top box to an RF module is not constant and changes irregularly. Jitter refers to a condition in which the interval between packets in a signal transmitted from an external device or set-top box to an RF module is not constant, and the signal transmitted from the set-top box arrives at the RF module late or early.

[0063] FIG. 3 is a drawing for explaining a detailed configuration of a display device according to various embodiments of the present disclosure.

[0064] According to FIG. 3, the display device (100) may include a first antenna unit (110), a second antenna unit (120), a first RF module (130), a second RF module (140), a first switching unit (150), a processor (160), a first matching unit (310), a memory (320), a display (330), and an interface (340). Among the configurations illustrated in FIG. 3, a detailed description of configurations that overlap with the configuration illustrated in FIG. 2 will be omitted.

[0065] The first matching unit (310) is configured to perform impedance matching for the first antenna unit (110). The first matching unit (310) may be referred to as a first matching circuit. When the first antenna unit (110) is connected to the second RF module (140), the processor (160) may match the impedance of the first antenna unit (110) to the frequency of the signal transmitted from the set-top box (200) in order to receive the signal transmitted from the set-top box (200) through the first antenna unit (110).

[0066] The display device (100) may perform a multi-link operation (MLO) or a multiple-input multiple-output (MIMO) operation. In the display device (100), the first antenna unit (110) and the second antenna unit (120) may each include at least one antenna for transmitting and receiving one of the frequency bands of 2.4 GHz, 5 GHz, and 6 GHz. In this case, the first antenna unit (110) and the second antenna unit (120) may transmit and receive signals in the same frequency band, or transmit and receive signals in similar bands where the difference in bandwidth is not large. According to one embodiment, at least one antenna for transmitting and receiving signals in the same frequency band may be included in both the first antenna unit (110) and the second antenna unit (120). For example, if the first antenna unit (110) includes antennas in the 2.4 GHz, 5 GHz, and 6 GHz frequency bands, the second antenna unit (120) may also include antennas in the 2.4 GHz, 5 GHz, and 6 GHz frequency bands.

[0067] At this time, when antennas of the same frequency band are included in the first antenna unit (110) and the second antenna unit (120), since the frequency bandwidths (ranges of frequencies) applied to the first antenna unit (110) and the second antenna unit (120) are different, it is possible to prevent interference between a signal received from the second external device (20) through the first antenna unit (110) and a signal received from the set-top box (200) through the second antenna unit (120). However, since there is a difference in the frequency bandwidths applied to the first antenna unit (110) and the second antenna unit (120), if one of the first antenna unit (110) and the second antenna unit (120) is implemented as a diversity antenna, the transmission rate of a signal transmitted and received through the diversity antenna may be reduced. For example, when the processor (160) connects the first antenna unit (110) to the second RF module (140) to use it as a diversity antenna, the transmission rate of the first antenna unit (110) connected to the second RF module (140) may be reduced compared to the transmission rate of the second antenna unit (120) because there is a difference in the frequency bandwidth of the first antenna unit (110) and the second antenna unit (120).

[0068] According to one embodiment, when the processor (160) connects the first antenna unit (110) to the second RF module (140) to use it as a diversity antenna, the transmission rate of the first antenna unit (110) and the transmission rate of the second antenna unit (120) may decrease together because the wiring connecting the first antenna unit (110) to the second RF module (140) and the wiring connecting the second antenna unit (120) to the second RF module (140) affect each other's matching.

[0069] The processor (160) can perform impedance matching on the first antenna unit (110) to increase the transmission rate of a signal received through the first antenna unit (110). For example, the first matching unit (310) can be placed between the first switching unit (150) and the second RF module (140). When the first antenna unit (110) operates as a diversity antenna for performing wireless communication with the set-top box (200), the processor (160) can control the first matching unit (310) to match the impedance of the first antenna unit (110) with the frequency of a signal transmitted from the set-top box (200) or with the second RF module (140). Due to this, the second RF module (140) can receive a signal transmitted from the set-top box (200) through the first antenna unit (110) and the second antenna unit (120).

[0070] Meanwhile, impedance matching refers to adjusting the impedance of signals transmitted between transmission lines or electronic components to minimize reflected signals and increase transmission rates. Impedance matching maximizes power or signal transmission, thereby increasing signal transmission rates.

[0071] The memory (320) can store at least one command, data, program, etc. required for the operation of the display device (100) or the processor (160). The memory (320) may be implemented in the form of memory embedded in the display device (100) or in the form of memory detachable from the display device (100) depending on the purpose of data storage. For example, data for driving the display device (100) may be stored in a memory embedded in the display device (100), and data for the expansion function of the display device (100) may be stored in a memory detachable from the display device (100).

[0072] Meanwhile, the memory embedded in the display device (100) may be implemented as at least one of volatile memory (e.g., dynamic RAM (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM)), non-volatile memory (e.g., one time programmable ROM (OTPROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (e.g., NAND flash or NOR flash), hard drive, or solid state drive (SSD)).

[0073] The memory (320) may be implemented as a single memory that stores data generated from various operations according to the present disclosure. However, according to another embodiment, the memory (320) may be implemented to include multiple memories that each store different types of data or each store data generated at different stages.

[0074] The display (330) is configured to display video content. When video data is received through the first antenna unit (110) or the second antenna unit (120), the processor (160) can display the received video data on the display (330).

[0075] The display (330) may be implemented as a display including a self-luminous element or a display including a non-luminous element and a backlight. For example, the display (330) may be implemented as various types of displays such as an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diodes) display, an LED (Light Emitting Diodes), a micro LED, a Mini LED, a PDP (Plasma Display Panel), a QD (Quantum dot) display, a QLED (Quantum dot light-emitting diodes), etc.

[0076] The interface (340) is configured to receive various data from a user or an external device. The interface (340) can receive user commands. The interface (340) may include a manipulation interface and an input / output interface.

[0077] For example, the operation interface is a configuration for receiving user operations. The operation interface may include various buttons, a touch screen, etc. provided on the main body of the display device (100). The user can directly input user commands into the display device (100) using the operation interface.

[0078] The input / output interface is a configuration for inputting / outputting various external signals. The input / output interface can be connected to various external memories or external sources (e.g., web servers, user terminal devices, etc.) and can input various data. The input / output interface can be implemented as at least one interface among HDMI (High Definition Multimedia Interface), MHL (Mobile High-Definition Link), USB (Universal Serial Bus), USB C-type, DP (Display Port), Thunderbolt, VGA (Video Graphics Array) port, RGB port, D-SUB (Dsubminiature), and DVI (Digital Visual Interface). The display device (100) can receive a user command or signal through an external memory or external source connected through the input / output interface.

[0079] Meanwhile, although the present disclosure has described a Wi-Fi module or an RF module as a communication interface for communicating with an external device, this is only one embodiment, and other communication modules may be further included. For example, the communication interface may further include at least one module of a Bluetooth module, an infrared communication module, or other communication modules. In addition, the communication interface may include at least one communication chip that performs communication according to various wireless communication standards, such as Zigbee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), LTE (Long Term Evolution), LTE-A (LTE Advanced), 4G (4th Generation), 5G (5th Generation), etc. In addition, the display device may further include a wired communication module in addition to the wireless communication module. The wired communication module may include, for example, at least one of a LAN (Local Area Network) module, an Ethernet module, a pair cable, a coaxial cable, an optical fiber cable, or a UWB (Ultra Wide-Band) module.

[0080] FIGS. 4 to 7 are drawings for explaining an operation of using a first antenna unit as a diversity antenna according to various embodiments of the present disclosure. Specifically, FIGS. 4 to 7 are drawings for explaining an operation of improving the quality of a signal transmitted from a set-top box (200) by using a first antenna unit (110) connected to a second external device (20) via a wireless network as a diversity antenna. Here, FIG. 4 is a drawing for explaining an operation of the first antenna unit (110) and the second antenna unit (120) receiving signals from different electronic devices (20, 200), respectively.

[0081] The processor (160) can transmit and receive signals between the display device (100), the set-top box (200), and the second external device (20) by performing MLO (Multi Link Operation), MIMO (Multiple-Input Multiple-Output), etc. For example, the processor (160) can control the second RF module (140) to transmit and receive signals between the display device (100) and the set-top box (200). In addition, the processor (160) can control the first RF module (130) to connect the display device (100) to an external AP (Access Point) in STA (WIFI Station) mode, and transmit and receive signals between the second external device (20) and the display device (100).

[0082] Referring to FIG. 4, the first antenna unit (110) can be electrically connected to the first RF module (130). The processor (160) can control the first RF module (130) to transmit and receive signals with the second external device (20) through the first antenna unit (110). In addition, the second antenna unit (120) can be electrically connected to the second RF module (140). The processor (160) can control the second RF module (140) to transmit and receive signals with the set-top box (200) through the second antenna unit (120). In this case, it can be confirmed that the connection between the first antenna unit (110) and the second RF module (140) is blocked.

[0083] Meanwhile, in FIG. 2, it is described that the LNA (low noise amplifier) ​​is included in the first RF module (130) and the second RF module (140), but as in FIGS. 4 and 5, the LNA (410) may be placed between the antenna (110, 120) and the RF module (130, 140).

[0084] FIG. 5 is a diagram for explaining a case where the first antenna unit (110) operates as a diversity antenna. According to FIG. 5, the processor (160) can control the second RF module (140) to receive a signal transmitted from the set-top box (200) through the first antenna unit (110) and the second antenna unit (120). The processor (160) can control the first switching unit (150) to connect the first antenna unit (110) to the second RF module (140). In addition, the processor (160) can control the first matching unit (310) to match the impedance of the first antenna unit (110) with the frequency of the signal transmitted from the set-top box (200) or with the second RF module (140).

[0085] The processor (160) continuously operates the second RF module (140) for transmitting and receiving signals between the display device (100) and the set-top box (200), but can switch the first RF module (130) to a standby state to minimize power consumption when there is no need to connect to the second external device (20). In this case, the processor (160) can use the first antenna unit (110) as a diversity antenna to improve the reception sensitivity of the signal transmitted from the set-top box (200) and expand the signal transmission area between the set-top box (200) and the display device (100).

[0086] The processor (160) can identify the quality of the signal received through the second antenna unit (120). If the first RF module (130) is in a standby state and the quality of the signal received through the second antenna unit (120) is below a preset reference value, the processor (160) can control the first switching unit (150) to operate the first antenna unit (110) as a diversity antenna. For example, if the BER (Bit Error Rate) of the signal received through the second antenna unit (120) increases and the transmission rate becomes below the minimum transmission rate when the first RF module (130) is in a standby state, the processor (160) can increase the transmission rate of the signal transmitted from the set-top box (200) to the second RF module (140).

[0087] When the first RF module (130) is in a standby state and the signal quality of the second antenna unit (120) is below a reference value, the processor (160) can control the first switching unit (150) to disconnect (Off) the connection between the first antenna unit (110) and the first RF module (130) and connect the first antenna unit (110) to the second RF module (140).

[0088] When the first RF module (130) is in an operating state, the signal quality of the second antenna unit (120) is below a reference value, and a user command for performing wireless communication with the set-top box (200) is input through the interface (340), the processor (160) can control the first switching unit (150) to operate the first antenna unit (110) as a diversity antenna. When the user command is input through the interface (340), the processor (160) can control the first switching unit (150) to switch the first RF module (130) to a standby state and connect the first antenna unit (110) to the second RF module (140) to perform wireless communication with the set-top box (200).

[0089] The processor (160) can periodically identify a signal received through the second antenna unit (120) when the first antenna unit (110) is connected to the second RF module (140) to perform wireless communication with the set-top box (200). In this case, if the signal quality of the second antenna unit (120) is above a reference value, the processor (160) can control the first switching unit (150) to disconnect (Off) the connection between the first antenna unit (110) and the second RF module (140) and to connect the first antenna unit (110) to the first RF module (130) in order to minimize power consumption.

[0090] The processor (160) can control the first matching unit (310) to match the impedance of the first antenna unit (110) with the frequency of the signal transmitted from the set-top box (200) so that the first antenna unit (110) can smoothly receive the signal transmitted from the set-top box (200). In this case, the first matching unit (310) can be placed between the first switching unit (150) and the second RF module (140).

[0091] Meanwhile, according to FIGS. 4 and 5, the second RF module (140) may include PRX (PRX1, PRX2, ...) ports and DRX (DRX1, DRX2, ...) ports. The PRX port is configured to receive a primary signal transmitted from the set-top box (200) through the second antenna unit (120). The DRX port is configured to receive a diversity signal transmitted from the set-top box (200) through the first antenna unit (110) when the first antenna unit (110) is connected to the second RF module (140).

[0092] For example, when the first antenna unit (110) is connected to the second RF module (140) to operate as a diversity antenna, the second RF module (140) can receive a signal received through the second antenna unit (120) through the PRX port, and can receive a signal received through the first antenna unit (110) through the DRX port. In this case, the processor (160) can control the second RF module (140) to combine a primary signal input through the PRX port and a diversity signal input through the DRX port.

[0093] The processor (160) can combine the primary signal and the diversity signal using selective combining, maximal ratio combining, equal gain combining, switched combining, etc. Selective combining may be a method of selecting a signal with the highest reception power among several input signals. Maximal ratio combining may be a method of combining each signal input to the RF module according to a predetermined ratio. In the case of the maximal ratio combining method, a process of determining a ratio for combining signals input to the RF module may be required. Equal gain combining may be a method of combining signals input to the RF module with the same phase.

[0094] The switched combining method is a method of selecting one of the signals input to the RF module, comparing the selected signal with a reference signal value (e.g., a threshold level), and determining another signal as the reception signal if the reception power of the selected signal is less than the reference signal value (e.g., a threshold level). For example, in the case of the switched combining method, the processor (160) may compare the primary signal input to the second RF module (140) with a reference signal value, and if the primary signal is greater than the reference signal value, determine the primary signal as the reception signal of the second RF module (140), and if the primary signal is less than the reference signal value, determine the diversity signal as the reception signal of the second RF module (140).

[0095] Although not illustrated in FIGS. 4 and 5, the second RF module (140) may include a combiner for combining a primary signal and a diversity signal. The combiner is configured to combine multiple signals input to the RF module and output them as a single signal. Since the combiner is a well-known component for signal processing, a detailed description thereof will be omitted.

[0096] FIGS. 6 and 7 are drawings for explaining an operation for reducing the impedance influence caused by wiring connected to a second RF module (140). Specifically, FIGS. 6 and 7 are drawings for explaining an operation for reducing the impedance influence caused by wiring when the wiring connected between the first antenna unit (110) and the second RF module (140) affects the impedance matching between the second antenna unit (120) and the second RF module (140).

[0097] According to FIG. 6, the display device (100) may further include a second switching unit (610) disposed between the first matching unit (310) and the second RF module (140). The second switching unit (610) is configured to selectively connect or disconnect a wire connected from the first antenna unit (110) to the second RF module (140).

[0098] FIG. 6 illustrates a state in which a second switching unit (610) is connected to connect a first antenna unit (110) to a second RF module (140). Since the operation in this case is the same as the operation illustrated in FIG. 5, a redundant description will be omitted.

[0099] FIG. 7 shows that the processor (160) connects the first antenna unit (110) to the first RF module (130) to transmit and receive signals with the second external device (20) through the first antenna unit (110).

[0100] The processor (160) can control the first switching unit (150) to disconnect (Off) the connection between the first antenna unit (110) and the second RF module (140) and connect the first antenna unit (110) to the first RF module (130). In this case, the wiring between the first switching unit (150) and the second RF module (140) can affect the impedance matching for the second antenna unit (120).

[0101] Meanwhile, in order to increase the transmission rate of the signal transmitted and received to and from the second RF module (140) through the second antenna unit (120), the processor (160) must perform impedance matching for the second antenna unit (120) and the transmission line. For example, the processor (160) may match the impedance for the second antenna unit (120) and the second RF module (140) to 50 ohms, taking into account aspects of power transmission and distortion of the signal waveform.

[0102] In this case, if the length of the transmission line connected to the second RF module (140) increases, the impedance for the second RF module (140) may increase due to the influence of the transmission line. The second antenna unit (120) and the second RF module (140), and the transmission line between the second antenna unit (120) and the second RF module (140), may be matched to an impedance optimized for a signal received from the set-top box (200). At this time, if the length of the wire connected from the first antenna unit (110) to the second RF module (140) increases, the impedance for the second RF module (140) may increase.

[0103] When the first antenna unit (110) is connected to the first RF module (130) to perform wireless communication with the second external device (20), the processor (160) can control the second switching unit (610) to turn off the wiring connecting the first antenna unit (110) to the second RF module (140).

[0104] FIGS. 8 to 11 are drawings for explaining the operation of selectively using the first antenna unit and the second antenna unit as a diversity antenna according to various embodiments of the present disclosure. Specifically, FIGS. 8 to 11 are drawings for explaining the operation of using the first antenna unit (110) as a diversity antenna or using the second antenna unit (120) as a diversity antenna.

[0105] According to FIG. 8, the display device (100) may further include a third switching unit (810) and a second matching unit (820). Among the configurations illustrated in FIG. 8, a detailed description of configurations that overlap with those illustrated in FIGS. 2 to 5 will be omitted.

[0106] The third switching unit (810) is configured to selectively connect the second antenna unit (120) to the first RF module (130) or the second RF module (140). The third switching unit (810) may include at least one switch arranged between each antenna included in the second antenna unit (120) and the first RF module (130) and the second RF module (140). For example, the third switching unit (810) may be configured using a known SPDT (Single Pole Double Throw).

[0107] The second matching unit (820) is configured to perform impedance matching for the second antenna unit (120). The second matching unit (820) may be referred to as a second matching circuit. When the second antenna unit (120) is connected to the first RF module (130), the processor (160) may match the impedance of the second antenna unit (120) to the frequency of the signal transmitted from the second external device (20) in order to receive the signal transmitted from the second external device (20) through the second antenna unit (120).

[0108] The processor (160) can perform impedance matching on the second antenna unit (120) to increase the transmission rate of a signal received through the second antenna unit (120). The second matching unit (820) can be arranged between the third switching unit (810) and the first RF module (130). When the second antenna unit (120) operates as a diversity antenna for performing wireless communication with the second external device (20), the processor (160) can control the second matching unit (820) to match the impedance of the second antenna unit (120) to the frequency of a signal transmitted from the second external device (20) or to the first RF module (130). As a result, the first RF module (130) can receive a signal transmitted from the second external device (20) through the first antenna unit (110) and the second antenna unit (120).

[0109] According to FIG. 8, the processor (160) can control the first switching unit (150) to connect the first antenna unit (110) and the first RF module (130). The first RF module (130) can transmit and receive signals with the second external device (20) through the first antenna unit (110). In addition, the processor (160) can control the third switching unit (810) to connect the second antenna unit (120) and the second RF module (140). The second RF module (140) can transmit and receive signals with the set-top box (200) through the second antenna unit (120).

[0110] In this case, it can be confirmed whether the connection between the first antenna unit (110) and the second RF module (140) is blocked. In addition, it can be confirmed whether the connection between the second antenna unit (120) and the first RF module (130) is also blocked.

[0111] The processor (160) can use the first antenna unit (110) as a diversity antenna to improve the quality of a signal transmitted from the set-top box (200) to the second RF module (140), or can use the second antenna unit (120) as a diversity antenna to improve the quality of a signal transmitted from the second external device (20) to the first RF module (130).

[0112] FIG. 9 is a diagram for explaining a case where the first antenna unit (110) operates as a diversity antenna. Referring to FIG. 9, as described in FIG. 5, the processor (160) controls the second RF module (140) to receive a signal transmitted from the set-top box (200) through the first antenna unit (110) and the second antenna unit (120). For example, the processor (160) may control the third switching unit (810) so that the second antenna unit (120) maintains a connection with the second RF module (140). In this case, the connection between the second antenna unit (120) and the first RF module (130) is cut off. The processor (160) can control the first switching unit (150) to turn off the connection between the first antenna unit (110) and the first RF module (130) and connect the first antenna unit (110) to the second RF module (140).

[0113] Additionally, the processor (160) can control the first matching unit (310) disposed between the first switching unit (150) and the second RF module (140) to perform impedance matching for the first antenna unit (110) so that the first antenna unit (110) can receive a signal transmitted from the set-top box (200).

[0114] FIG. 10 is a diagram for explaining a case where the second antenna unit (120) operates as a diversity antenna. Referring to FIG. 10, the processor (160) controls the first RF module (130) to receive a signal transmitted from a second external device (20) through the first antenna unit (110) and the second antenna unit (120). Specifically, the processor (160) can identify a signal received through the first antenna unit (110).

[0115] When the second RF module (140) is in a standby state and the quality of the signal received through the first antenna unit (110) is below a reference value, the processor (160) can control the third switching unit (810) so that the second antenna unit (120) is connected to the first RF module (130) to perform wireless communication with the second external device (20). For example, when the third switching unit (810) is implemented as a single pole double throw (SPDT), the processor (160) can control the third switching unit (810) to disconnect (Off) the connection between the second antenna unit (120) and the second RF module (140) and connect the second antenna unit (120) to the first RF module (130). In this case, the processor (160) can control the first switching unit (150) so that the first antenna unit (110) maintains the connection with the first RF module (130). Additionally, the connection between the first antenna unit (110) and the second RF module (140) is blocked.

[0116] When the second RF module (140) is in an operating state, the signal quality of the first antenna unit (110) is below a reference value, and a user command for performing wireless communication with the second external device (20) is input through the interface (340), the processor (160) may control the third switching unit (810) to operate the second antenna unit (120) as a diversity antenna. When a user command is input through the interface (340), the processor (160) may control the third switching unit (810) to switch the second RF module (140) to a standby state and connect the second antenna unit (120) to the first RF module (130) to perform wireless communication with the second external device (20).

[0117] The processor (160) can periodically identify a signal received through the first antenna unit (110) when the second antenna unit (120) is connected to the first RF module (130) to perform wireless communication with the second external device (20). In this case, if the signal quality of the first antenna unit (110) is above a reference value, the processor (160) can control the third switching unit (810) to disconnect (Off) the connection between the second antenna unit (120) and the first RF module (130) and connect the second antenna unit (120) to the second RF module (140).

[0118] In addition, when the second antenna unit (120) operates as a diversity antenna for performing wireless communication with the second external device (20), the processor (160) can control the second matching unit (820) to perform impedance matching on the second antenna unit (120) so that the second antenna unit (120) can receive a signal transmitted from the second external device (20).

[0119] Fig. 11 is a drawing for explaining an operation for reducing the impedance influence caused by wiring connected to the first RF module (130). Specifically, Fig. 11 is a drawing for explaining an operation for reducing the impedance influence caused by wiring when the wiring connected between the second antenna unit (120) and the first RF module (130) affects the impedance matching between the first antenna unit (110) and the first RF module (130).

[0120] According to FIG. 11, the display device (100) may further include a fourth switching unit (1110) positioned between the second matching unit (820) and the first RF module (130). The fourth switching unit (1110) is configured to selectively connect or disconnect the wiring connected from the second antenna unit (120) to the first RF module (130). In this case, the closer the fourth switching unit (1110) is positioned to the first RF module (130), the better.

[0121] When the operation of the diversity antenna for the second antenna unit (120) is terminated in FIGS. 8 to 10, the processor (160) can control the third switching unit (810) to disconnect (Off) the connection between the second antenna unit (120) and the first RF module (130) and connect the second antenna unit (120) to the second RF module (140). In this case, if the wiring between the third switching unit (810) and the first RF module (130) becomes long, the wiring may affect the impedance matching for the first antenna unit (110) or the first RF module (130).

[0122] When the second antenna unit (120) is connected to the second RF module (140) to perform wireless communication with the set-top box (200), the processor (160) can control the fourth switching unit (1110) to turn off the wiring connected from the second antenna unit (120) to the first RF module (130).

[0123] In this way, the display device (100) according to the present disclosure can improve the quality of the signal received from the set-top box (200) by connecting the first antenna unit (110) to the second RF module (140) if the quality of the signal received from the set-top box (200) through the second antenna unit (120) is below a reference value. In addition, the display device (100) according to the present disclosure can also improve the quality of the signal received from the second external device (20) by connecting the second antenna unit (120) to the first RF module (130) if the quality of the signal received from the second external device (20) through the first antenna unit (110) is below a reference value.

[0124] FIG. 12 and FIG. 13 are flowcharts illustrating a method for controlling a display device according to various embodiments of the present disclosure. Specifically, FIG. 12 is a diagram illustrating a method for operating a first antenna unit as a diversity antenna.

[0125] According to FIG. 12, the display device may include a first RF module for performing wireless communication with an external device using a first antenna unit, and a second RF module for performing wireless communication with a set-top box using a second antenna unit.

[0126] The display device identifies the quality of the signal received through the second antenna unit (S1210). For example, when the display device is connected to a set-top box via a wireless network, the signal transmitted from the set-top box to the display device must satisfy a minimum transmission rate or higher. For example, a transmission rate of at least 300 Mbps or higher is required for the display device to perform 8Kbit video communication with the set-top box. However, the strength of the signal transmitted from the set-top box to the display device decreases as the distance between the display device and the set-top box increases. The relationship between the signal transmitted from the set-top box to the display device and the distance can be expressed as [Mathematical Formula 1] below.

[0127]

[0128] Here, P is the power value representing the strength of the signal received by the display device, k is a proportional constant, d is the distance between the display device and the set-top box, is a power value that indicates the size of the signal transmitted from the set-top box.

[0129] As the distance between the display device and the set-top box increases, the strength of the signal received by the display device may decrease, or the signal transmitted from the set-top box to the display device may not meet the minimum transmission rate due to an obstacle located between the display device and the set-top box. The display device can identify the signal received through the second antenna unit and determine whether the received signal is above the minimum transmission rate.

[0130] The display device determines whether the first RF module is in standby mode (S1220). The display device continuously operates the second RF module for transmitting and receiving signals between the display device and the set-top box, but the first RF module can be switched to standby mode to minimize power consumption when there is no need to connect to an external device.

[0131] The display device connects the first antenna unit to the second RF module so that the first antenna unit performs wireless communication with the set-top box when the first RF module is in a standby state and the quality of the signal received through the second antenna unit is below a preset reference value (S1230). For example, the display device can control a switch to disconnect the connection between the first antenna unit and the first RF module and connect the first antenna unit to the second RF module. In this case, the display device can maintain the connection state between the first antenna unit and the first RF module when the first RF module is in an operating state or the quality of the signal received through the second antenna unit is above a reference value.

[0132] In addition, when the first antenna unit is connected to the second RF module, the display device can match the impedance of the first antenna unit with the frequency of the signal received from the set-top box. When the first antenna unit is connected to the second RF module, the display device can match the impedance of the first antenna unit with the frequency of the signal transmitted from the set-top box in order to receive the signal transmitted from the set-top box through the first antenna unit.

[0133] Meanwhile, the display device may switch the first RF module to a standby state when a user command for performing wireless communication with a set-top box is input while the first RF module is in an operating state and the quality of a signal received through the second antenna unit is below a reference value. In addition, the display device may connect the first antenna unit to the second RF module so that the first antenna unit performs wireless communication with the set-top box.

[0134] When the display device is connected to the second RF module for wireless communication with the set-top box through the first antenna unit, the display device can periodically identify a signal received through the second antenna unit. In this case, if the signal quality of the second antenna unit is above a reference value, the display device can disconnect (Off) the connection between the first antenna unit and the second RF module and connect the first antenna unit to the first RF module.

[0135] In this case, the first antenna unit and the second antenna unit can transmit and receive signals in the same frequency band, or transmit and receive signals in a similar band with a small difference in bandwidth. When the first antenna unit and the second antenna unit operate in the same frequency band, the frequency bandwidths (ranges of frequencies) applied to the first antenna unit and the second antenna unit are different, so that interference between a signal received from an external device through the first antenna unit and a signal received from a set-top box through the second antenna unit can be prevented.

[0136] The first antenna unit and the second antenna unit may each include at least one antenna for transmitting and receiving in any one of the frequency bands of 2.4 GHz, 5 GHz, and 6 GHz. For example, if the first antenna unit includes antennas in the frequency bands of 2.4 GHz, 5 GHz, and 6 GHz, the second antenna unit may also include antennas in the frequency bands of 2.4 GHz, 5 GHz, and 6 GHz.

[0137] Figure 13 is a drawing for explaining a method of operating the second antenna unit as a diversity antenna.

[0138] According to FIG. 13, the display device can identify the quality of a signal received through the first antenna unit (S1310). For example, when the display device is connected to an external device through the first antenna, the signal transmitted from the external device through the first antenna must satisfy a minimum transmission rate or higher. However, the signal transmitted from the external device to the display device may not satisfy the minimum transmission rate due to a decrease in the strength of the signal received by the display device due to a distance between the display device and the external device, or due to interference factors such as obstacles located between the display device and the external device. The display device can identify the signal received through the first antenna unit and determine whether the received signal is above the minimum transmission rate.

[0139] The display device can identify whether the second RF module is in a standby state (S1320). The display device can also switch the first RF module or the second RF module to a standby state to minimize power consumption.

[0140] If the second RF module is in a standby state and the quality of the signal received through the first antenna unit is below a reference value, the display device can connect the second antenna unit to the first RF module so that the second antenna unit can perform wireless communication with an external device (S1330). For example, the display device can control a switch to disconnect the connection between the second antenna unit and the second RF module and connect the second antenna unit to the first RF module. In this case, the display device can maintain the connection state between the second antenna unit and the second RF module if the second RF module is in an operating state or the transmission rate of the signal received through the first antenna unit is above a minimum transmission rate.

[0141] Additionally, when the second antenna unit is connected to the first RF module, the display device can match the impedance of the second antenna unit with the frequency of a signal received from an external device. Specifically, when the second antenna unit is connected to the first RF module, the display device can match the impedance of the second antenna unit with the frequency of a signal transmitted from the external device in order to receive a signal transmitted from the external device through the second antenna unit.

[0142] Meanwhile, the display device may switch the second RF module to a standby state when a user command for performing wireless communication with an external device is input, if the second RF module is in an operating state and the quality of the signal received through the first antenna unit is below a reference level. In addition, the display device may connect the second antenna unit to the first RF module so that the second antenna unit performs wireless communication with the external device.

[0143] When the second antenna unit is connected to the first RF module for wireless communication with an external device, the display device can periodically identify a signal received through the first antenna unit. In this case, when the signal quality of the first antenna unit is above a reference value, the display device can disconnect (Off) the connection between the second antenna unit and the first RF module and connect the second antenna unit to the second RF module.

[0144] Meanwhile, according to an embodiment of the present disclosure, the various embodiments described above may be implemented as software including commands stored in a machine-readable storage medium that can be read by a machine (e.g., a computer). The device is a device that can call commands stored from the storage medium and operate according to the called commands, and may include a display device according to the disclosed embodiments. When a command is executed by a processor, the processor can perform a function corresponding to the command directly or under the control of the processor by using other components. The command may include code generated or executed by a compiler or interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' means that the storage medium does not contain a signal and is tangible, but does not distinguish between data being stored semi-permanently or temporarily in the storage medium.

[0145] Furthermore, according to one embodiment of the present disclosure, the method according to the various embodiments described above may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or online through an application store (e.g., Play Store™). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0146] In addition, each of the components (e.g., modules or programs) according to the various embodiments described above may be composed of a single or multiple entities, and some of the corresponding sub-components described above may be omitted, or other sub-components may be further included in various embodiments. Alternatively or additionally, some components (e.g., modules or programs) may be integrated into a single entity, which may perform the same or similar functions as those performed by each of the corresponding components prior to integration. Operations performed by modules, programs or other components according to various embodiments may be executed sequentially, in parallel, iteratively or heuristically, or at least some operations may be executed in a different order, omitted, or other operations may be added.

[0147] The above embodiments are merely specific examples to illustrate the technical content according to embodiments of the present disclosure and to aid understanding of embodiments of the present disclosure, and are not intended to limit the scope of embodiments of the present disclosure. Accordingly, the scope of the various embodiments of the present disclosure should be interpreted to include all modifications or variations derived based on the technical concepts of the various embodiments of the present disclosure, in addition to the embodiments disclosed in this specification.

Claims

1. In the display device, A first antenna unit configured to perform wireless communication with an external device; A first RF circuit configured to transmit and receive a signal through the first antenna unit; A second antenna unit configured to perform wireless communication with a set-top box; A second RF circuit configured to transmit and receive a signal through the second antenna unit; A first switch configured to selectively connect the first antenna unit to a first RF circuit and a second RF circuit; Memory that stores instructions; and At least one processor configured to execute the above instructions; At least one processor, Identify the quality of the signal received through the second antenna unit, A display device that controls the first switch so that the first antenna unit is connected to the second RF circuit to perform wireless communication with the set-top box when the first RF circuit is in a standby state and the quality of a signal received through the second antenna unit is below a preset reference value.

2. In paragraph 1, A display device further comprising a first matching circuit disposed between the first switch and the second RF circuit and controlling the impedance of the first antenna unit to correspond to the frequency of a signal received from the set-top box.

3. In paragraph 2, Further comprising a second switch arranged between the first matching circuit and the second RF circuit and configured to selectively connect a wire connected from the first antenna unit to the second RF circuit; At least one processor, A display device, wherein when the first antenna unit is connected to the first RF circuit, the second switch is controlled to disconnect the wiring connected to the second RF circuit from the first antenna unit.

4. In paragraph 1, Further comprising an interface configured to receive user input for performing wireless communication with the set-top box; At least one processor, A display device, wherein when the signal quality received through the second antenna unit is below a preset reference value and a user input is received through the interface, the first RF circuit is switched to a standby state and the first switch is controlled so that the first antenna unit is connected to the second RF circuit to perform wireless communication with the set-top box.

5. In paragraph 1, Further comprising a third switch configured to selectively connect the second antenna unit to the first RF circuit and the second RF circuit; At least one processor, A display device that identifies the quality of a signal received through the first antenna unit, and controls the third switch so that the second RF circuit is connected to the first RF circuit to perform wireless communication with the external device when the quality of the signal received through the first antenna unit is lower than a second reference value while the second RF circuit is in a standby state.

6. In paragraph 5, A display device further comprising a second matching circuit arranged between the third switch and the first RF circuit and controlling the impedance of the second antenna unit to correspond to the frequency of a signal received from the external device.

7. In paragraph 6, Further comprising a fourth switch arranged between the second matching circuit and the first RF circuit and configured to selectively connect a wire connected from the second antenna unit to the first RF circuit; At least one processor, A display device that controls the fourth switch to disconnect the wiring connected to the first RF circuit from the second antenna unit when the second antenna unit is connected to the second RF circuit.

8. In paragraph 5, further comprising an interface configured to receive user input for performing wireless communication with the external device; At least one processor, A display device, wherein when the signal quality received through the first antenna unit is below the second reference value and a user input is received through the interface, the second RF circuit is switched to a standby state and the third switch is controlled so that the second antenna unit is connected to the first RF circuit to perform wireless communication with the external device.

9. A method for controlling a display device, comprising a first RF circuit configured to perform wireless communication with an external device through a first antenna unit, and a second RF circuit configured to perform wireless communication with a set-top box through a second antenna unit, A step of identifying the quality of a signal received through the second antenna unit; A step of identifying whether the first RF circuit is in a standby state; and A control method comprising: a step of connecting the first antenna unit to the second RF circuit so that the first antenna unit performs wireless communication with the set-top box when the first RF circuit is in a standby state and the quality of a signal received through the second antenna unit is below a preset reference value; 10. In paragraph 9, The step of connecting the first antenna unit to the second RF circuit is: A control method, comprising: a step of controlling the impedance of the first antenna unit to correspond to the frequency of a signal received from the set-top box.

11. In paragraph 9, Further comprising a step of receiving a user input for performing wireless communication with the set-top box; The step of connecting the first antenna unit to the second RF circuit is: A control method comprising: a step of switching the first RF circuit to a standby state and connecting the first antenna unit to a second RF circuit so that the first antenna unit performs wireless communication with the set-top box when the first RF circuit is not in a standby state and the quality of the signal received through the second antenna unit is below a reference value.

12. In paragraph 9, A step of identifying the quality of a signal received through the first antenna unit; a step of identifying whether the second RF circuit is in a standby state; and A control method further comprising: a step of connecting the second antenna unit to the first RF circuit so that the second antenna unit performs wireless communication with the external device when the second RF circuit is in a standby state and the quality of the signal received through the first antenna unit is below a second reference value.

13. In paragraph 12, The step of connecting the second antenna unit to the first RF circuit is: A control method comprising: a step of controlling the impedance of the second antenna unit to correspond to the frequency of a signal received from the external device.

14. In paragraph 12, Further comprising a step of receiving a user input for performing wireless communication with the external device; The step of connecting the second antenna unit to the first RF circuit is: A control method comprising: a step of switching the second RF circuit to a standby state and connecting the second antenna unit to the first RF circuit so that the second antenna unit performs wireless communication with the external device when the second RF circuit is in an operating state and the quality of a signal received through the first antenna unit is below a second reference value; 15. A non-transitory computer-readable recording medium including a program for executing a control method of a display device including a first RF circuit configured to perform wireless communication with an external device through a first antenna unit, and a second RF circuit configured to perform wireless communication with a set-top box through a second antenna unit, The above control method is, A step of identifying the quality of a signal received through the second antenna unit; A step of identifying whether the first RF circuit is in a standby state; and A computer-readable recording medium comprising: a step of connecting the first antenna unit to the second RF circuit so that the first antenna unit performs wireless communication with the set-top box when the first RF circuit is in a standby state and the quality of the signal received through the second antenna unit is below a preset reference value;

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