WO2018211769A1 - Display device - Google Patents

Abstract

This display device is provided with: a display unit; a plurality of wireless communication units that respectively include antennas having directivity that can be controlled; and a control unit that controls the wireless communication units. The wireless communication units are disposed around the display unit.

Description

Display device

One embodiment of the present invention relates to a display device.
This application claims priority on Japanese Patent Application No. 2017-098357 filed in Japan on May 17, 2017, the contents of which are incorporated herein by reference.

Wireless communication using millimeter waves is wireless communication using a radio wave having a wavelength of about 1 to 10 mm (corresponding to a frequency of about 30 to 300 GHz) as a carrier wave. For example, the 28 GHz band which is one of the candidate frequency bands of the fifth generation mobile communication system (5G) is also included in the millimeter wave band wireless communication. Since wireless communication using millimeter waves can perform wireless communication in a frequency band wider than a frequency band (for example, 800 MHz, 2 GHz) used in wireless communication that has been widely used, a large amount of data And multiple channels are possible. However, the millimeter wave has a short wavelength and thus has a high straight-ahead property, is greatly attenuated by the shielding object, and is easily affected by absorption and scattering during propagation in the air. In wireless communication using millimeter waves, it is preferable to form a beam in an appropriate direction in order to ensure sufficient electric field strength in communication.

In wireless communication using millimeter waves, loss due to wireless communication circuit board wiring is large, and it is necessary to design the array antenna and the wireless communication circuit close to each other. For this reason, in wireless communication using millimeter waves, it is common to mount in a terminal device with a configuration of a module (wireless communication circuit unit) in which an array antenna and a wireless communication circuit are integrated.
Beam forming is performed by an array antenna element (antenna element) arranged at equal intervals and a wireless communication circuit unit connected to each of the array antenna elements and activated. The activated wireless communication circuit units are configured to be able to transmit and receive signals with different gains and phases.

For example, Patent Document 1 describes a display device using communication using millimeter waves.

Japanese Patent No. 5312767

However, the display device with a built-in antenna described in Patent Document 1 may cause millimeter wave shielding by the user's hand or body. For this reason, since the technique described in Patent Document 1 cannot cope with the problem of shielding, there is a possibility that the communication quality is deteriorated.

One embodiment of the present invention has been made in view of the above points, and an object thereof is to provide a display device capable of improving communication quality in communication using millimeter waves.

(1) One aspect of the present invention is made to solve the above-described problem, and one aspect of the present invention includes a display unit, a plurality of wireless communication units including an antenna capable of controlling directivity, A control unit, wherein the control unit controls the directivity of the antenna, and each of the wireless communication units is a display device arranged around the display unit.

(2) One embodiment of the present invention is the display device according to (1), in which at least one of the plurality of wireless communication units is arranged at a first corner around the display unit, At least one is disposed at a second corner facing the first corner.

(3) One embodiment of the present invention is the display device according to (1), in which at least one of the plurality of wireless communication units is arranged on a first side around the display unit, At least one is disposed on a second side opposite to the first side.

(4) One embodiment of the present invention is the display device according to any one of (1) to (3), in which the control unit transmits from the transmission device detected by the wireless communication unit. On the basis of the received radio wave reception intensity, it is determined which of the plurality of wireless communication units is to be used for communication.

(5) One embodiment of the present invention is the display device according to any one of (1) to (4), wherein the display device performs MIMO communication using two or more wireless communication units. It is.

(6) One embodiment of the present invention is the display device according to any one of (1) to (5), in which each of the plurality of wireless communication units includes an array antenna, a wireless communication circuit, and the like. Consists of

According to one embodiment of the present invention, communication quality can be improved in communication using millimeter waves.

It is a system configuration figure showing an example of the composition of the display system concerning a 1st embodiment of the present invention. It is explanatory drawing which shows an example of arrangement | positioning of the radio | wireless communication part of the display apparatus which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows an example of the hardware constitutions of the display apparatus which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows an example of a function structure of the display apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows an example of the beam forming of the display apparatus which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows an example of the hardware constitutions of the transmitter which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows an example of a function structure of the transmitter which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the communication process of the display apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the communication process at the time of the initial connection of the display apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows an example of the communication process at the time of the normal connection of the display apparatus which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows an example of arrangement | positioning of the radio | wireless communication part of the display apparatus which concerns on the 1st modification of this invention. It is explanatory drawing which shows an example of arrangement | positioning of the radio | wireless communication part of the display apparatus which concerns on the 2nd modification of this invention.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a system configuration diagram illustrating an example of a configuration of a display system sys according to the first embodiment of the present invention.
The display system sys includes a display device 10 and a transmission device 20.
The display device 10 is, for example, a television receiver. The display device 10 includes a plurality of wireless communication units 111, 112, 113, and 114 (wireless communication modules) for wireless communication. Each wireless communication unit includes an array antenna and a wireless communication circuit. The display device 10 detects the communication state of the device itself, and performs MIMO (Multi-Input and Multi-Output) communication using a plurality of wireless communication units simultaneously based on the detected communication state of the device itself. The display device 10 receives broadcast data by a broadcast wave or the like and displays a video based on the broadcast data or displays a video based on video data received via the wireless communication unit.
The transmission device 20 includes a plurality of wireless communication units, and transmits video data to the display device 10.
In this embodiment, an example of wireless communication using millimeter waves as wireless communication will be described. However, wireless communication using a frequency band (carrier wave) such as 800 MH, 3 GHz, or 5 GHz may be performed.

Note that the display device 10 may receive broadcast data received by the transmission device 20 via a wireless communication unit. The display device 10 may perform MIMO communication using a part of the plurality of wireless communication units, that is, two or more wireless communication units of the plurality of wireless communication units, Wireless communication may be performed using one or more wireless communication units among a plurality of wireless communication units.
The display device 10 preferably includes a display unit having a certain size, for example, a size of 23 inches or more. However, the display device 10 is not limited to this, and may be smaller. The reporting device 10 is preferably a stationary type, but is not limited to this, and may be a movable type.

First, the display device 10 according to the first embodiment will be described.
FIG. 2 is an explanatory diagram illustrating an example of the arrangement of the wireless communication units of the display device 10 according to the first embodiment.
As shown in FIG. 2, the display device 10 includes a display unit 13, and a frame unit F is provided around the display unit 13. In FIG. 2 below, the right side and the lower side may be referred to as an X direction and a Y direction, respectively. The X direction and the Y direction are respectively parallel to the direction of the long side and the short side of the front surface of the display device 10 (the surface on which the display unit 13 can be viewed). The depth direction with respect to FIG. In FIG. 2, the plane facing the front (front) and the plane facing the back (back) may be referred to as the front surface and the back surface, respectively.

The first wireless communication unit 111, the second wireless communication unit 112, the third wireless communication unit 113, and the fourth wireless communication unit 114 are arranged around the display unit 13, that is, in the frame unit F. For example, the first wireless communication unit 111 is disposed at the upper left corner of the display unit 13, and the second wireless communication unit 112 is disposed at the upper right corner of the display unit 13, and the third wireless The communication unit 113 is disposed at the lower right corner of the display unit 13, and the fourth wireless communication unit 114 is disposed at the lower left corner of the display unit 13. In other words, the first wireless communication unit 111 is disposed at the left corner of the upper side of the display unit 13, and the second wireless communication unit 112 is the upper side of the display unit 13, and the first wireless communication unit 111 is arranged at a corner different from the corner where the first wireless communication unit 111 sharing the side where the first wireless communication unit 111 is arranged, and the third wireless communication unit 113 is arranged with the first wireless communication unit 111. The fourth wireless communication unit 114 is disposed at a corner formed by a shared side and a side opposite to the corner where the first wireless communication unit 111 is disposed. Is done.

Here, the corner (corner) refers to a corner formed by two sides on a certain surface (for example, the front surface), a corner around the corner, a certain surface (for example, the front surface), and a certain surface (for example, the upper surface). ) And corners around the corner (edge). In the present embodiment, a case where a wireless communication unit (array antenna) is arranged at a corner formed by two sides on a certain surface will be described as an example.
Here, in order to suppress mutual interference with other wireless communication units, each wireless communication unit is preferably arranged at a predetermined interval, for example, at least 50 cm or more away from other wireless communication units.
Note that the distance between the wireless communication units may be 50 cm or less by narrowing the beam width of the wireless communication to suppress interference with other wireless communication units.
By arranging in this way, it is possible to use a propagation path using reflection by a ceiling or a wall in an indoor environment. In addition, since a propagation path using reflection from a ceiling or wall in an indoor environment can be used, transmission efficiency in MIMO communication can be improved.
In addition, even if any wireless communication unit is shielded by a user or the like, communication can be performed using another wireless communication unit that is not shielded, so that communication quality can be improved.

FIG. 3 is a schematic block diagram illustrating an example of a hardware configuration of the display device 10 according to the first embodiment of the present invention.
The display device 10 includes a CPU 101, a drive unit 102, a storage medium 103, an input unit 104, an output unit 105, a ROM 106 (Read Only Memory), a RAM 107 (Random Access Memory), an auxiliary storage unit 108, And an interface unit 109. The CPU 101, the drive unit 102, the input unit 104, the output unit 105, the ROM 106, the RAM 107, the auxiliary storage unit 108, and the interface unit 109 are connected to each other via a bus.
The CPU 101 here indicates a general processor, and includes not only a device called a CPU in a narrow sense but also a GPU, a DSP, and the like. The CPU 101 referred to here is not limited to being realized by a single processor, and may be realized by combining a plurality of processors of the same or different types.

The CPU 101 reads out and executes programs stored in the auxiliary storage unit 108, the ROM 106, and the RAM 107, reads various data stored in the auxiliary storage unit 108, the ROM 106, and the RAM 107, and stores various data in the auxiliary storage unit 108, the RAM 107. The display device 10 is controlled by writing. Further, the CPU 101 reads various data stored in the storage medium 103 via the drive unit 102 and writes various data to the storage medium 103. The storage medium 103 is a portable storage medium such as a magneto-optical disk, a flexible disk, or a flash memory, and stores various data.
The drive unit 102 is a reading device for a storage medium 103 such as an optical disk drive or a flexible disk drive.

The input unit 104 is an input device such as a mouse, a keyboard, a touch panel, a channel button, a power button, a setting button, and an infrared receiving unit.
The output unit 105 is an output device such as a display unit or a speaker.
The ROM 106 and the RAM 107 store programs and various data for operating the functional units of the display device 10.
The auxiliary storage unit 108 is a hard disk drive, a flash memory, or the like, and stores a program for operating each functional unit of the display device 10 and various data.
The interface unit 109 has a communication interface and is connected to the network NW by wire or wireless.

For example, the wireless communication control unit 12 and the control unit 15 in the functional configuration of the display device 10 in FIG. 4 to be described later correspond to the CPU 101 in FIG. 3, and the wireless communication unit 11 in FIG. 4 corresponds to the interface unit 109 in FIG. The display unit 13 in FIG. 4 corresponds to the output unit 105 in FIG.

FIG. 4 is a schematic block diagram illustrating an example of a functional configuration of the display device 10 according to the first embodiment of the present invention.
The display device 10 includes a wireless communication unit 11, a wireless communication control unit 12, a display unit 13, and a control unit 15. The wireless communication unit 11 includes a first wireless communication unit 111, a second wireless communication unit 112, a third wireless communication unit 113, and a fourth wireless communication unit 114. The first wireless communication unit 111 includes an array antenna 1111 and a wireless communication circuit 1112. The second wireless communication unit 112 includes an array antenna 1121 and a wireless communication circuit 1122. The third wireless communication unit 113 includes an array antenna 1131 and a wireless communication circuit 1132. The fourth wireless communication unit 114 includes an array antenna 1141 and a wireless communication circuit 1142. The control unit 15 includes a communication control unit 151. In the following description, when the wireless communication units are collectively referred to, or when the wireless communication units are not distinguished from each other, the wireless communication unit 11 will be described.

The array antennas 1111, 1121, 1131, and 1141 are antennas whose directivities can be controlled, and each has a plurality of antenna elements. Each of the array antennas 1111, 1121, 1131, and 1141 includes a plurality of antenna elements, and the plurality of antenna elements are regularly arranged at a predetermined interval in a predetermined direction. The array antennas 1111, 1121, 1131, and 1141 are, for example, microstrip antennas.

The wireless communication circuits 1112, 1122, 1132, and 1142 give variable phase and amplitude to received signals respectively received by the plurality of antenna elements constituting the array antennas 1111, 1121, 1131, and 1141, as described above. In addition, a phase shifter that can set the gains of the reception systems constituting each of the wireless communication circuits 1112, 1122, 1132, and 1142, and that can change the phase of those, and an amplifier (amplifier) that can control the amplitude of the transmission signal. , Convert millimeter wave received signal to baseband signal (baseband signal) or intermediate frequency signal (IF signal) (downconvert), convert baseband signal or intermediate frequency signal to millimeterwave transmission signal (upconvert) ) Or a radio module including a frequency converter or the like.

The array antenna 1111 and the wireless communication circuit 1112 are integrally formed, the array antenna 1121 and the wireless communication circuit 1122 are integrally formed, the array antenna 1131 and the wireless communication circuit 1132 are integrally formed, and the array antenna 1141 and the wireless communication circuit 1122 are wirelessly formed. The communication circuit 1142 may be configured integrally.
Based on the control by the wireless communication control unit 12, the wireless communication unit 11 converts signals input via the communication control unit 151 into array antennas 1111, 1121, 1131, 1141 and wireless communication circuits 1112, 1122, 1132, 1142. To another device such as the transmission device 20. The wireless communication unit 11 outputs a signal received from another device such as the transmission device 20 to the wireless communication control unit 12 based on the control by the wireless communication control unit 12.

The array antennas 1111, 1121, 1131, and 1141 constituting each of the wireless communication units 111, 112, 113, and 114 can set the peak direction to a three-dimensional direction when performing beam scanning. The beam scan is to sequentially change the peak direction (peak reception direction) having the highest directivity of each of the array antennas 1111, 1121, 1131, and 1141, and search for the peak direction having the highest reception intensity.
The peak direction component includes an azimuth angle on a plane including the display surface of the display unit 13 and an elevation angle based on the plane. The azimuth angle in the peak direction of the array antenna 1111 can be set within a range of 270 ° from the lower side of the display unit 13 to the left, from the upper side to the right side.
The azimuth angle in the peak direction of the array antenna 1121 can be set within a range of 270 ° from the left side of the display unit 13 to the upper side, the right side, and the lower side by performing beam scanning. The azimuth angle of the array antenna 1131 in the peak direction can be set within a range of 270 ° from the upper side of the display unit 13 to the right side and the lower side to the left side by performing beam scanning. The azimuth angle in the peak direction of the array antenna 1141 can be set within a range of 270 ° from the right side to the lower side, the left side, and the upper side by performing beam scanning.

The wireless communication control unit 12 monitors (detects) the communication quality (communication state) of each wireless communication unit 111, 112, 113, 114 via each wireless communication unit 111, 112, 113, 114. Specifically, the wireless communication control unit 12 monitors packets transmitted and received by the wireless communication units 111, 112, 113, and 114, and sets evaluation indexes such as throughput characteristics and delay amounts to the wireless communication units 111, 112, 113, Calculate every 114. The wireless communication control unit 12 compares the calculated evaluation index with a predetermined value stored in advance, and determines whether the communication quality (communication state) is good or bad depending on whether it is less than the predetermined value. judge. The wireless communication control unit 12 stops communication of the wireless communication unit that has determined that the communication quality is poor. The wireless communication control unit 12 executes a beam scan in the stopped wireless communication unit, and determines a beam to be used for communication based on the beam scan result. The wireless communication control unit 12 restarts millimeter wave communication using the determined beam in the wireless communication unit that has stopped communication.

Also, the wireless communication control unit 12 detects (beam scans) the reception direction of millimeter waves (radio waves) using the array antennas 1111, 1121, 1131, 1141 of the wireless communication units 111, 112, 113, 114. The searched peak direction corresponds to the direction of the transmission device 20 with respect to the display device 10 or the arrival direction of the incoming wave from the transmission device 20. In order to change the peak direction, each wireless communication unit 111, 112, 113, 114 gives a phase to a received signal received by each of the plurality of antenna elements constituting the array antennas 1111, 1121, 1131, 1141, Further, a gain of a receiving system that configures each of the wireless communication circuits 1112, 1122, 1132, and 1142 is set, and a phase shifter that can change the phase thereof, and an amplifier that can control the gain of the transmission signal are provided. Prepare.

The wireless communication control unit 12 combines signals obtained by controlling the phase and gain between antenna elements to obtain a combined received signal. The wireless communication control unit 12 measures the reception intensity, which is the intensity of the obtained combined reception signal, for each peak direction. The wireless communication control unit 12 outputs strength information indicating the measured reception strength for each peak direction to the control unit 15. Further, the wireless communication control unit 12 sets a phase and a gain corresponding to the peak direction with the highest reception intensity in each antenna element and the wireless communication circuit. The phase and gain are set as the phase and gain used for communication, and a beam of a transmission signal having the highest transmission intensity in the peak direction is formed.

Further, the radio communication control unit 12 synthesizes a signal obtained by giving a set phase with respect to signals individually received by the antenna elements constituting the array antenna to be operated, and obtains a combined received signal. The beam formed at this time exhibits directivity with the highest reception intensity from the peak direction. The wireless communication control unit 12 outputs the obtained combined reception signal to the communication control unit 151 as a reception signal. Further, the wireless communication control unit 12 sets the phase and gain corresponding to the peak direction with the highest received intensity as the gain of the wireless communication circuit corresponding to the phase of the antenna element. The phase difference is set as a phase difference used for communication, and a beam of a transmission signal having the highest transmission intensity in the peak direction is formed. The wireless communication control unit 12 may be referred to as a radio wave detection unit.

The radio communication control unit 12 controls the phase and amplitude so that signals received individually by the antenna elements constituting the array antenna of each radio communication unit are combined between the antenna elements to obtain a combined received signal. . The beam formed at this time exhibits directivity with the highest reception intensity from the peak direction. The wireless communication control unit 12 outputs the obtained combined reception signal to the communication control unit 151 as a reception signal.

Note that the wireless communication control unit 12 may determine the array antenna that gives the peak direction with the highest reception intensity among the array antennas 1111, 1121, 1131, and 1141 as the array antenna to be operated. In this case, the wireless communication control unit 12 may output operation information indicating the determined array antenna to the control unit 15. In this case, the wireless communication control unit 12 may transmit the millimeter-wave band transmission signal input from the communication control unit 151 via a plurality of antenna elements constituting the determined array antenna. In this case, if the wireless communication control unit 12 transmits the millimeter-wave transmission signal input from the communication control unit 151 via the plurality of antenna elements and the wireless communication circuit that constitute the selected array antenna. Good.

The display unit 13 displays various information input from the control unit 15. The display unit 13 is a display device such as a liquid crystal display or an organic EL (electro-luminescence) display.
The control unit 15 controls the operation of the display device 10. The control unit 15 includes a general-purpose control device such as a CPU (Central Processing Unit). The control unit 15 may realize the function by performing processing instructed by a predetermined control program.

The communication control unit 151 performs various processes for communication between the display device 10 and another device (for example, the transmission device 20). For example, the communication control unit 151 modulates a baseband transmission signal, performs D / A conversion (Digital to Analog conversion) on the modulated signal obtained by the modulation, and outputs the result to the wireless communication control unit 12. Further, the communication control unit 151 performs A / D conversion (Analog to Digital conversion) on the reception signal input from the wireless communication control unit 12 to obtain a reception signal. For example, the communication control unit 151 performs processing related to connection with another device such as the transmission device 20.

Next, beam forming will be described.
FIG. 5 is an explanatory diagram illustrating an example of beamforming of the display device 10 according to the first embodiment.
The directivity pattern of the array antenna is generally expressed in three dimensions. However, in order to simplify the description, the example shown in FIG. 5 is described in two dimensions. In the illustrated example, a curve starting from the upper left end of the array antenna 1111 (first wireless communication unit 111), a curve starting from the upper right end of the array antenna 1121 (second wireless communication unit 112), and an array antenna 1131 A curve starting from the lower right end of (third wireless communication unit 113) and a curve starting from the lower left end of array antenna 1141 (fourth wireless communication unit 114) represent a directivity pattern for each peak direction. ing. In the illustrated example, a solid line in the directivity pattern near the array antenna 1111 (first wireless communication unit 111) will be described. It should be noted that the broken line in the directivity pattern near the array antenna 1121 (second wireless communication unit 112), the broken line in the directivity pattern near the array antenna 1131 (third wireless communication unit 113), and the array antenna 1141 (fourth). The broken line in the directivity pattern in the vicinity of the wireless communication unit 114) is the same as that of the array antenna 1111 (first wireless communication unit 111), and thus the description thereof is omitted.

Curved arrows indicate that the directivity pattern is sequentially switched by beam scanning. A curve Lb represents each directivity pattern, and a curved line Lb ′ filled with an inside represents a directivity pattern related to a peak direction determined by the wireless communication control unit 12 to have the highest reception intensity. That is, the peak direction corresponds to the direction of the transmission device 20 or the arrival direction of the incoming wave. Thus, during communication, a beam of a transmission signal is formed so that the transmission intensity in that direction is the highest, and the directivity of the reception signal is adjusted so that the reception intensity from that direction is the highest.

FIG. 6 is a schematic block diagram illustrating an example of a hardware configuration of the transmission device 20 according to the first embodiment of the present invention.
The transmission apparatus 20 includes a CPU 201, a drive unit 202, a storage medium 203, an input unit 204, an output unit 205, a ROM 206, a RAM 207, an auxiliary storage unit 208, and an interface unit 209. The CPU 201, the drive unit 202, the input unit 204, the output unit 205, the ROM 206, the RAM 207, the auxiliary storage unit 208, and the interface unit 209 are connected to each other via a bus.
The CPU 201 referred to here indicates a general processor, and includes not only a device called a CPU in a narrow sense but also a GPU, a DSP, and the like. Further, the CPU 201 referred to here is not limited to being realized by a single processor, and may be realized by combining a plurality of processors of the same or different types.

The CPU 201 reads and executes programs stored in the auxiliary storage unit 208, ROM 206, and RAM 207, reads various data stored in the auxiliary storage unit 208, ROM 206, and RAM 207, and stores various data in the auxiliary storage unit 208, RAM 207. Is transmitted to control the transmission apparatus 20. In addition, the CPU 201 reads various data stored in the storage medium 203 via the drive unit 202 and writes various data to the storage medium 203. The storage medium 203 is a portable storage medium such as a magneto-optical disk, a flexible disk, or a flash memory, and stores various data.
The drive unit 202 is a reading device for a storage medium 203 such as an optical disk drive or a flexible disk drive.

The input unit 204 is an input device such as a mouse, a keyboard, a touch panel, and operation buttons.
The output unit 205 is an output device such as a display unit or a speaker.
The ROM 206 and the RAM 207 store programs and various data for operating the functional units of the transmission device 20.
The auxiliary storage unit 208 is a hard disk drive, a flash memory, or the like, and stores a program for operating each function unit of the transmission device 20 and various data.
The interface unit 209 has a communication interface and is connected to the network NW by wire or wireless.

For example, the wireless communication control unit 22 and the control unit 25 in the functional configuration of the transmission device 20 in FIG. 7 described later correspond to the CPU 201 in FIG. 6, and the wireless communication unit 21 in FIG. 7 corresponds to the interface unit 209 in FIG. The data input / output unit 23 in FIG. 7 corresponds to the input unit 204, the output unit 205, and the interface unit 209 in FIG.

FIG. 7 is a schematic block diagram illustrating an example of a functional configuration of the transmission device 20 according to the first embodiment of the present invention.
The transmission device 20 includes a wireless communication unit 21, a wireless communication control unit 22, a data input / output unit 23, and a control unit 25. The wireless communication unit 11 includes a first wireless communication unit 211, a second wireless communication unit 212, a third wireless communication unit 213, and a fourth wireless communication unit 214. The first wireless communication unit 211 includes an array antenna 2111 and a wireless communication circuit 2112. The second wireless communication unit 212 includes an array antenna 2121 and a wireless communication circuit 2122. The third wireless communication unit 213 includes an array antenna 2131 and a wireless communication circuit 2132. The fourth wireless communication unit 214 includes an array antenna 2141 and a wireless communication circuit 2142.
The control unit 25 includes a communication control unit 251. In the following description, when the wireless communication units are collectively referred to, or when the wireless communication units are not distinguished from each other, they will be referred to as the wireless communication unit 21 for explanation.

The array antennas 2111, 2112, 1311, and 2141 are antennas whose directivities can be controlled, and each has a plurality of antenna elements. Each of the array antennas 2111, 2112, 1311, 2141 includes a plurality of antenna elements, and the plurality of antenna elements are regularly arranged at a predetermined interval in a predetermined direction. The array antennas 2111, 2112, 1311, 2141 are, for example, microstrip antennas.

The wireless communication circuits 2112, 2122, 2132, and 2142 give variable phase and amplitude to the received signals, respectively, in the plurality of antenna elements constituting the array antennas 2111, 2112, 1311, and 2141 as described above, In addition, a phase shifter that can set the gains of the reception systems constituting the wireless communication circuits 2112, 2122, 2132, and 2142 and change the phase shift thereof, and an amplifier (amplifier) that can control the amplitude of the transmission signal. , Convert millimeter wave received signal to base signal (baseband signal) or intermediate frequency signal (IF signal) (down convert), convert base signal or intermediate frequency signal to millimeter wave transmit signal (up convert) A wireless module including a frequency converter or the like.

The array antenna 2111 and the wireless communication circuit 2112 are integrally formed, the array antenna 2121 and the wireless communication circuit 2122 are integrally formed, the array antenna 2131 and the wireless communication circuit 2132 are integrally formed, and the array antenna 2141 and the wireless communication circuit 2122 are wirelessly formed. The communication circuit 2142 may be integrated.
Based on the control by the wireless communication control unit 22, the wireless communication unit 21 transmits signals such as video data input via the communication control unit 251 to the array antennas 2111, 2112, 1311, 2141 and the wireless communication circuits 2112, 2122. 2132 and 2142 to other devices such as the display device 10. The wireless communication unit 21 outputs a signal received from another device such as the display device 10 to the wireless communication control unit 22 based on the control by the wireless communication control unit 22.

The array antennas 2111, 2112, 1311, 2141 constituting each of the wireless communication units 211, 212, 213, 214 can set the peak direction to a three-dimensional direction when performing beam scanning.
The wireless communication control unit 22 detects (beam scans) the reception direction of millimeter waves (radio waves) using the array antennas 2111, 2112, 1311, and 2141 of the wireless communication units 211, 212, 213, and 214. In order to change the peak direction, each wireless communication unit 211, 212, 213, 214 gives a phase to the received signal received by each of the plurality of antenna elements constituting the array antennas 211, 2121, 2131, 2141, Further, a gain of a receiving system that configures each of the wireless communication circuits 2112, 2122, 2132, and 2142 is set, and a phase shifter that can change the phase thereof, and an amplifier that can control the gain of the transmission signal are provided. Prepare.

The radio communication control unit 22 combines signals obtained by controlling the phase and gain between antenna elements to obtain a combined received signal. The wireless communication control unit 22 measures the reception intensity, which is the intensity of the obtained combined reception signal, for each peak direction. The wireless communication control unit 22 determines the array antenna that gives the peak direction with the highest reception intensity among the array antennas 2111, 2112, 1311, and 2141 as the array antenna to be operated. The wireless communication control unit 22 outputs operation information indicating the determined array antenna to the control unit 25.
The wireless communication control unit 22 transmits a millimeter-wave band transmission signal input from the communication control unit 251 via a plurality of antenna elements that constitute the determined array antenna. The wireless communication control unit 22 sets a phase and a gain corresponding to the peak direction with the highest reception intensity in each antenna element and the wireless communication circuit. The phase and gain are set as the phase and gain used for communication, and a beam of a transmission signal having the highest transmission intensity in the peak direction is formed.
Further, the radio communication control unit 22 synthesizes a signal obtained by giving a set phase with respect to signals individually received by the antenna elements constituting the array antenna to be operated, and obtains a combined received signal. The beam formed at this time exhibits directivity with the highest reception intensity from the peak direction. The wireless communication control unit 22 outputs the obtained combined reception signal to the communication control unit 251 as a reception signal. The wireless communication control unit 22 may be referred to as a radio wave detection unit.

The wireless communication control unit 22 transmits a millimeter-wave transmission signal input from the communication control unit 251 via a plurality of antenna elements constituting the array antenna and a wireless communication circuit. The wireless communication control unit 22 sets the phase and gain corresponding to the peak direction with the highest received intensity as the gain of the wireless communication circuit corresponding to the phase of the antenna element. The phase difference is set as a phase difference used for communication, and a beam of a transmission signal having the highest transmission intensity in the peak direction is formed.
Further, the radio communication control unit 22 controls the phase and amplitude so that signals received individually by the antenna elements constituting the array antenna are combined between the antenna elements to obtain a combined received signal. The beam formed at this time exhibits directivity with the highest reception intensity from the peak direction. The wireless communication control unit 22 outputs the obtained combined reception signal to the communication control unit 251 as a reception signal.

The data input / output unit 23 functions as a receiving unit that receives video data, and receives video data from other devices, storage media, the Internet, broadcast waves, and the like. Note that the data input / output unit 23 may function as a transmission unit that transmits video data transmitted from the display device 10 or the like to another device, a storage medium, or the like. That is, the data input / output unit 23 functions as an interface for acquiring (receiving) video data and transmitting video data.
The control unit 25 controls the operation of the transmission device 20. The control unit 25 includes a general-purpose control device such as a CPU. The control unit 25 may realize the function by performing processing instructed by a predetermined control program.

The communication control unit 251 performs various processes for communication with the display device 10. For example, the communication control unit 251 modulates a baseband transmission signal, performs D / A conversion on the modulation signal obtained by the modulation, and outputs the result to the wireless communication control unit 22. In addition, the communication control unit 251 performs A / D conversion on the reception signal input from the wireless communication control unit 22 to obtain a reception signal. For example, the communication control unit 251 performs processing related to connection with another device such as the display device 10.

FIG. 8 is a flowchart showing an example of communication processing of the display device 10 according to the first embodiment of the present invention.
In step S101, the wireless communication control unit 12 monitors (detects) the communication quality (communication state) of each wireless communication unit 111, 112, 113, 114 via each wireless communication unit 111, 112, 113, 114. To do. In addition, the wireless communication control unit 12 monitors packets transmitted and received by the wireless communication units 111, 112, 113, and 114, and evaluates indexes such as throughput characteristics and delay amounts for the wireless communication units 111, 112, 113, and 114. calculate.

In step S103, the wireless communication control unit 12 determines whether or not the evaluation index representing the communication state calculated for each of the wireless communication units 111, 112, 113, and 114 is less than a predetermined value.
When the evaluation index of each wireless communication unit 111, 112, 113, 114 is not less than the predetermined value (step S103: NO), the wireless communication control unit 12 communicates with each wireless communication unit 111, 112, 113, 114. If all the states are good, the process of step S101 is repeatedly executed. On the other hand, when the evaluation index of each of the wireless communication units 111, 112, 113, and 114 is less than a predetermined value (step S103: YES), the wireless communication control unit 12 determines that each wireless communication unit 111, 112, 113, If at least one of the communication states 114 is defective, the process of step S105 is executed.

In step S105, the wireless communication control unit 12 stops the communication of the wireless communication unit whose evaluation index is less than the predetermined value, that is, the communication of the wireless communication unit having a bad communication state.
In step S107, the wireless communication control unit 12 performs a beam scan in the stopped wireless communication unit.
In step S109, the wireless communication control unit 12 determines a beam with good communication quality as a beam to be used for communication based on the beam scan result.
In step S111, the wireless communication control unit 12 restarts millimeter wave communication using the determined beam in the stopped wireless communication unit.

As described above, according to the first embodiment, the display device 10 includes the display unit 13 and the plurality of wireless communication units 111 including the antennas (array antennas 1111, 1121, 1131, and 1141) capable of controlling directivity. 112, 113, 114, and a control unit 15 that controls the wireless communication units 111, 112, 113, 114, and the wireless communication units 111, 112, 113, 114 are arranged around the display unit 13. The

With such a configuration, even if the communication quality (communication state) of any wireless communication unit is not good due to shielding by a person or the like, communication can be performed using the other wireless communication unit. Communication quality can be improved in communication using millimeter waves.

(Second Embodiment)
In the second embodiment, an example will be described in which a beam scan result is held in advance as a beam candidate, and communication is resumed using another beam candidate when the communication quality is not good.

Here, since it is the same when comparing the configuration of the display device 10 according to the first embodiment and the configuration of the display device 10 according to the second embodiment, illustration and description are omitted, and the second embodiment is omitted. The explanation will focus on the differences. Moreover, since it is the same when comparing the configuration of the transmission device 20 according to the first embodiment and the configuration of the transmission device 20 according to the second embodiment, illustration and description are omitted, and in the second embodiment. The description will focus on the different parts.

The wireless communication control unit 12 of the display device 10 stores the beam scan result in a storage unit (not shown). Specifically, the wireless communication control unit 12 performs a beam scan when initially connected to the transmission device 20. Then, the wireless communication control unit 12 ranks each beam in the order of the peak direction in which reception intensity is high, and associates the rank with the beam to generate a beam candidate list.
Then, the wireless communication control unit 12 stores the generated beam candidate list in the storage unit.

The wireless communication control unit 22 of the transmission device 20 stores the beam scan result in a storage unit (not shown). Specifically, the wireless communication control unit 22 performs a beam scan when initially connected to the display device 10. Then, the wireless communication control unit 22 ranks each beam in order of the peak direction in which the reception intensity is high, and generates a beam candidate list by associating the rank with the beam.
Then, the wireless communication control unit 22 stores the generated beam candidate list in the storage unit.

FIG. 9 is a flowchart showing an example of communication processing at the time of initial connection of the display device 10 according to the second embodiment of the present invention.
In step S201, the wireless communication control unit 12 performs a beam scan.
In step S203, the radio communication control unit 12 ranks each beam in the order of the peak direction with the highest reception intensity as a result of the beam scan, and generates a beam candidate list by associating the rank with the beam. The wireless communication control unit 12 stores the generated beam candidate list in the storage unit.
In step S205, the wireless communication control unit 12 reads the beam candidate list from the storage unit, and communicates by connecting to the transmission device 20 using the beam having the highest rank.

FIG. 10 is a flowchart illustrating an example of communication processing during normal connection of the display device 10 according to the second embodiment of the present invention.
In step S301, the wireless communication control unit 12 monitors (detects) the communication quality (communication state) of each wireless communication unit 111, 112, 113, 114 via each wireless communication unit 111, 112, 113, 114. To do. In addition, the wireless communication control unit 12 monitors packets transmitted and received by the wireless communication units 111, 112, 113, and 114, and evaluates indexes such as throughput characteristics and delay amounts for the wireless communication units 111, 112, 113, and 114. calculate.

In step S303, the wireless communication control unit 12 determines whether or not the evaluation index indicating the communication state calculated for each of the wireless communication units 111, 112, 113, and 114 is less than a predetermined value.
When the evaluation index of each wireless communication unit 111, 112, 113, 114 is not less than the predetermined value (step S303: NO), the wireless communication control unit 12 communicates with each wireless communication unit 111, 112, 113, 114. If all the states are good, the process of step S301 is repeatedly executed. On the other hand, when the evaluation index of each wireless communication unit 111, 112, 113, 114 is less than a predetermined value (step S303: YES), the wireless communication control unit 12 is each wireless communication unit 111, 112, 113, If at least one of the communication states 114 is defective, the process of step S305 is executed.

In step S305, the wireless communication control unit 12 stops the communication of the wireless communication unit whose evaluation index is less than the predetermined value, that is, the communication of the wireless communication unit having a bad communication state.
In step S307, the radio communication control unit 12 reads out the beam candidate list in the stopped radio communication unit from the storage unit, and among the beams included in the beam candidate list, the beam other than the beam currently in use and having the highest rank. A high beam is selected, and the transmitter 20 is connected using the selected beam.
In step S309, the wireless communication control unit 12 determines whether or not an evaluation index representing communication quality (communication state) with the transmission apparatus 20 using the connected beam is equal to or higher than a predetermined value.
When the evaluation index is not equal to or greater than the predetermined value (step S309: NO), the radio communication control unit 12 returns to step S307, and among the beams included in the beam candidate list other than the previously selected beam, Choose a difficult beam. On the other hand, when the evaluation index is equal to or greater than the predetermined value (step S309: YES), the wireless communication control unit 12 executes the process of step S311.
In step S311, the wireless communication control unit 12 restarts millimeter wave communication using the selected beam in the stopped wireless communication unit.

As described above, according to the second embodiment, the display device 10 includes the display unit 13 and the plurality of wireless communication units 111 including the antennas (array antennas 1111, 1121, 1131, and 1141) capable of controlling directivity. 112, 113, 114, and a control unit 15 that controls the wireless communication units 111, 112, 113, 114, and the wireless communication units 111, 112, 113, 114 are arranged around the display unit 13. The

With such a configuration, even if the communication quality (communication state) of any wireless communication unit is not good due to shielding by a person or the like, communication can be performed using the other wireless communication unit. Communication quality can be improved in communication using millimeter waves. Further, since the beam candidate list is stored in advance, the time until reconnection can be shortened, and the convenience for the user can be improved.

(First modification)
FIG. 11 is an explanatory diagram showing an example of the arrangement of the wireless communication unit 11 of the display device 10 according to the first modification of the present invention.
As shown in FIG. 11, the display device 10 includes a display unit 13, and a frame unit F is provided around the display unit 13. In FIG. 11 below, the right side and the lower side may be referred to as an X direction and a Y direction, respectively. The X direction and the Y direction are respectively parallel to the direction of the long side and the short side of the front surface of the display device 10 (the surface on which the display unit 13 can be viewed). The depth direction with respect to FIG. 11 may be referred to as the Z direction. In FIG. 11, the plane facing the front (front) and the plane facing the back (back) may be referred to as the front surface and the back surface, respectively.

The second wireless communication unit 112 and the fourth wireless communication unit 114 may be arranged around the display unit 13, that is, in the frame unit F. For example, the second wireless communication unit 112 is disposed at the upper right corner of the display unit 13, and the fourth wireless communication unit 114 is disposed at the lower left corner of the display unit 13. In other words, the second wireless communication unit 112 is arranged at any corner around the display unit 13, and the fourth wireless communication unit 114 is arranged at a corner opposite to the corner. Good.

By doing in this way, even if the communication quality (communication state) of one of the wireless communication units is not good due to shielding by a person or the like, communication can be performed using the other wireless communication unit. Therefore, communication quality can be improved in communication using millimeter waves. Further, mutual interference between the wireless communication units can be reduced. Furthermore, since the number of wireless communication units can be reduced, the cost of the display device 10 can be reduced.

(Second modification)
FIG. 12 is an explanatory diagram showing an example of the arrangement of the wireless communication unit 11 of the display device 10 according to the second modification of the present invention.
As shown in FIG. 12, the display device 10 includes a display unit 13, and a frame unit F is provided around the display unit 13. The right side and the lower side of FIG. 12 below may be referred to as the X direction and the Y direction, respectively. The X direction and the Y direction are respectively parallel to the direction of the long side and the short side of the front surface of the display device 10 (the surface on which the display unit 13 can be viewed). The depth direction may be referred to as the Z direction with respect to FIG. In FIG. 12, a plane facing the front (front) and a plane facing the back (back) may be referred to as the front surface and the back surface, respectively.

The first wireless communication unit 111 and the third wireless communication unit 113 may be arranged around the display unit 13, that is, in the frame unit F. For example, the first wireless communication unit 111 is disposed on the upper side of the display unit 13, and the third wireless communication unit 113 is disposed on the lower side of the display unit 13. In other words, the first wireless communication unit 111 is disposed at a substantially central portion of the upper side around the display unit 13, and the third wireless communication unit 113 is disposed at a substantially central portion of the lower side that is a side opposite to the upper side. It may be arranged.

By doing in this way, even if the communication quality (communication state) of one of the wireless communication units is not good due to shielding by a person or the like, communication can be performed using the other wireless communication unit. Therefore, communication quality can be improved in communication using millimeter waves. Further, mutual interference between the wireless communication units can be reduced. Furthermore, since the installation position of the transmission device 20 can be installed, for example, directly below or directly above the display device 10, user convenience can be improved. In addition, by arranging the wireless communication unit around the display unit 13, it is possible to reduce the influence of shielding, noise, interference, and the like by the internal substrate of the display device 10.

(Third Modification)
In the display device 10 illustrated in FIG. 12, the first wireless communication unit and the third wireless communication are provided on the frame portion F on the long side (X direction) of the display device 10, that is, on the upper side or the lower side around the display unit 13. A part may be arranged. In this case, in order to suppress mutual interference with other wireless communication units, it is preferable that each wireless communication unit be arranged at a predetermined interval, for example, at least 50 cm or more from other wireless communication units.
Note that the distance between the wireless communication units may be 50 cm or less by narrowing the beam width of the wireless communication to suppress interference with other wireless communication units.
By doing in this way, the same effect as other embodiments and other modifications can be acquired.

In each of the above embodiments and modifications, an example in which two or four wireless communication units are used has been described. However, one of the wireless communication units may be provided, or three, You may make it provide five or more.

In each of the above-described embodiments and modifications, the arrangement of the plurality of antenna elements constituting the array antenna included in each wireless communication unit may be the same, or according to the arrangement of each array antenna. Different antenna elements may be arranged. When the same arrangement of a plurality of antenna elements is used for each array antenna, the antenna element to be used may be determined according to the arrangement of the array antennas. When the same arrangement of antenna elements is used, chip manufacturing costs can be reduced. Further, when changing the arrangement of the antenna elements in accordance with the arrangement of the array antennas, for example, by arranging more antenna elements in the direction in which each array antenna is difficult to be shielded, the beam is finer in a desired direction. Can be formed. In addition, the wireless communication unit can be reduced in size by using the number of antenna elements corresponding to the arrangement of the array antenna.

In each of the above-described embodiments and modifications, the number of the plurality of antenna elements constituting each of the array antennas may be the same, or the number of antenna elements that are different for each array antenna. . When the same number of antenna elements is used for each array antenna, the manufacturing cost of the chip can be reduced. Also, when changing the arrangement of the antenna elements of the array antenna, for example, by arranging more antenna elements in a direction in which each array antenna is difficult to be shielded, a beam is formed more finely in a desired direction. Can do. In addition, the wireless communication unit can be reduced in size by using the number of antenna elements corresponding to the arrangement of the array antenna.

In each of the above-described embodiments and modifications, the beam direction and the number of beams scanned by each array antenna may be the same beam direction or the same number of beams, or different beam directions or There may be a different number of beams.
When using a beam direction or a different number of beams for each array antenna, it is possible not to scan in the direction of a beam that is easily shielded, or to finely scan in the direction of a beam that is difficult to shield. Therefore, communication quality can be improved.

In each of the above embodiments and modifications, a plurality of wireless communication control units and communication control units may be provided according to the number of wireless communication units. With this configuration, since beam scanning can be executed even when communication is performed using a certain wireless communication unit, communication quality can be improved. In addition, since it is not necessary to perform beam scanning each time, power consumption can be reduced. On the other hand, when one wireless communication control unit is provided as in the first embodiment, the manufacturing cost of the display device can be reduced.

In each of the embodiments and modifications described above, when performing a beam scan, the beam scan may be performed using only the array antenna to be activated.
With this configuration, power consumption can be reduced. In addition, the time required for beam scanning can be reduced.

In each of the above-described embodiments and modifications, the case where the shape of each wireless communication unit including the antenna and the wireless communication circuit is rectangular has been described. However, the shape is not necessarily limited to this shape. For example, a quadrangular shape such as a square may be used, or another shape such as a round shape or a triangular shape may be used.

In addition, you may make it implement | achieve the one aspect | mode of this invention combining one or some, some, or all of each embodiment and each modification mentioned above.

Note that one program that operates in the display device 10 and the transmission device 20 according to one aspect of the present invention is provided so as to realize the functions described in the above embodiments and modifications according to one aspect of the present invention, or A plurality of programs (programs that cause a computer to function) that control a processor such as a CPU (Central Processing Unit) may be used.
Information handled by each of these devices is temporarily stored in a RAM (Random Access Memory) at the time of processing, and then stored in various storages such as a flash memory and an HDD (Hard Disk Drive). Then, it may be read out, corrected and written by a CPU or the like.

Note that a part or all of the display device 10 and the transmission device 20 in each of the above-described embodiments and modifications may be realized by a computer including one or a plurality of processors.
In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

It should be noted that the “computer system” here is a computer system built in the display device 10 and the transmission device 20 and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.

Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In such a case, a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

In addition, a part or all of the display device 10 and the transmission device 20 in each of the above-described embodiments and modifications may be typically realized as an LSI that is an integrated circuit, or may be realized as a chip set. . In addition, each functional block of the display device 10 and the transmission device 20 in each of the embodiments and modifications described above may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry and / or general purpose processors is also possible. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

Further, in each of the above-described embodiments and modifications, the display device 10 and the transmission device 20 are described. However, one aspect of the present invention is not limited thereto, and is a stationary type installed indoors and outdoors. / Or non-movable electronic devices such as AV devices, kitchen devices, cleaning / washing devices, air-conditioning devices, office devices, vending machines, automobiles, bicycles, other life devices, communication devices, etc. It can also be applied to. Moreover, you may apply to the electronic device which is not provided with a display part.

As described above, the embodiments and modifications as one aspect of the present invention have been described in detail with reference to the drawings. However, specific configurations are not limited to the embodiments and modifications, and depart from the gist of the present invention. This includes design changes that do not occur. In addition, one aspect of the present invention can be modified in various ways within the scope of the claims, and the technical aspects of the present invention also relate to embodiments obtained by appropriately combining technical means disclosed in different embodiments. Included in the range. Moreover, it is the element described in said each embodiment and modification, and the structure which substituted the element which has the same effect is also contained.

The embodiments of the present invention have been described in detail above with reference to the drawings. However, the specific configuration is not limited to the above-described one, and various design changes and the like can be made without departing from the scope of the present invention. Is possible.

One embodiment of the present invention can be applied to a display device or the like that needs to improve communication quality in communication using millimeter waves.

sys display system F frame unit 10 display device 101 CPU
102 drive unit 103 storage medium 104 input unit 105 output unit 106 ROM
107 RAM
108 Auxiliary storage unit 109 Interface unit 11 Wireless communication unit 111 First wireless communication unit 1111, 1121, 1131, 1141 Array antenna 1112, 1122, 1132, 1142 Wireless communication circuit 112 Second wireless communication unit 113 Third wireless communication Unit 114 fourth wireless communication unit 12 wireless communication control unit 13 display unit 15 control unit 151 communication control unit 20 transmitting device 201 CPU
202 Drive unit 203 Storage medium 204 Input unit 205 Output unit 206 ROM
207 RAM
208 Auxiliary storage unit 209 Interface unit 21 Wireless communication unit 211 First wireless communication unit 2111, 2112, 1311, 2141 Array antenna 2112, 2122, 2132, 2142 Wireless communication circuit 212 Second wireless communication unit 213 Third wireless communication Unit 214 fourth wireless communication unit 22 wireless communication control unit 23 data input / output unit 25 control unit 251 communication control unit

Claims (6)

1. A display unit;
   A plurality of wireless communication units including antennas capable of controlling directivity;
   A control unit;
   With
   The control unit controls the directivity of the antenna,
   Each of the wireless communication units is arranged around the display unit.
   Display device.
2. The plurality of wireless communication units are:
   At least one is disposed at a first corner around the display, and at least one is disposed at a second corner opposite the first corner;
   The display device according to claim 1.
3. The plurality of wireless communication units are:
   The display device according to claim 1, wherein at least one is disposed on a first side around the display unit, and at least one is disposed on a second side opposite to the first side.
4. The control unit determines which of the plurality of wireless communication units uses the wireless communication unit to perform communication based on reception intensity of a radio wave transmitted from the transmission device detected by the wireless communication unit. decide,
   The display device according to any one of claims 1 to 3.
5. The display apparatus according to claim 1, wherein MIMO communication is performed using two or more wireless communication units.
6. Each of the plurality of wireless communication units includes an array antenna and a wireless communication circuit.
   The display device according to any one of claims 1 to 5.

Images