Wireless communication control method, display device and wireless communication system

Abstract

A wireless communication control method, a display device, and a wireless communication system are provided, which can suppress the reduction of communication quality. A wireless communication control method is a wireless communication control method for a display device, wherein first connection information is sent by the first wireless communication unit of the display device, and when a connection request using the first connection information is received by the first wireless communication unit, it is determined whether a first transmission source that sent the connection request using the first connection information satisfies a pre-set condition, and when the first transmission source satisfies the condition, second connection information is sent to the first transmission source, and when a connection request using the second connection information is received by the first wireless communication unit, a connection using the second connection information is started between the first transmission source and the first wireless communication unit.

Description

Technical Field

[0001] The invention relates to a wireless communication control method, a display device and a wireless communication system. Background Art

[0002] Conventionally, there is known a device that has connection information such as a plurality of SSIDs (Service Set Identifiers) and can perform automatic wireless setting for at least one of the plurality of connection information, such as a wireless LAN access point device disclosed in Patent Document 1.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2019-191411

[0004] However, when the connection information is made public, it is impossible to manage the number of information processing devices connected based on the public connection information, and the connections may be concentrated and the communication quality may be reduced. Summary of the invention

[0005] One way to solve the above-mentioned problem is a wireless communication control method for a display device having a first wireless communication unit, wherein when first connection information for temporary connection is sent through the first wireless communication unit and a connection request using the first connection information is received through the first wireless communication unit, it is determined whether the sending source of the connection request is a sending source that satisfies a preset condition; if it is a sending source that satisfies the preset condition, second connection information for formal connection is sent to the sending source; when a connection request using the second connection information is received through the first wireless communication unit, a formal connection using the second connection information is started between the sending source and the sending source of the connection request.

[0006] Another way to solve the above-mentioned problem is a display device, comprising: a first wireless communication unit; and a control unit, which controls the first wireless communication unit, wherein the control unit sends first connection information for temporary connection through the first wireless communication unit, and when a connection request using the first connection information is received through the first wireless communication unit, the control unit determines whether the sending source of the connection request is a sending source that satisfies a preset condition; if it is a sending source that satisfies the preset condition, the control unit sends second connection information for formal connection to the sending source; and when a connection request using the second connection information is received through the first wireless communication unit, the control unit starts a formal connection using the second connection information with the sending source of the connection request.

[0007] Another way to solve the above-mentioned problem is a wireless communication system comprising: a display device, which has a first wireless communication unit; an information processing device, which has a third wireless communication unit; and a wireless communication device, wherein the display device causes the first wireless communication unit to send first connection information for temporary connection, and when the first wireless communication unit receives a connection request using the first connection information, determines whether the sending source of the connection request is a sending source that satisfies a preset condition, and when it is a sending source that satisfies the preset condition, sends second connection information for formal connection to the sending source, and when the information processing device receives the first connection information through the third wireless communication unit, sends the connection request using the received first connection information to the display device, and when the second connection information is received from the display device, sets the second connection information for the wireless communication device connected to the information processing device, controls the wireless communication device, and starts a formal connection based on the second connection information between the display device and the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a block diagram showing the configuration of the wireless communication system according to the first embodiment.

[0009] Figure 2 This is a diagram showing an example of an application screen displayed on the display panel of the information processing device.

[0010] Figure 3 This is a diagram showing an example of an application screen displayed on the display panel of the information processing device.

[0011] Figure 4 This is a diagram showing an example of an application screen displayed on the display panel of the information processing device.

[0012] Figure 5 This is a flowchart showing the operation of the information processing device.

[0013] Figure 6 This is a flowchart showing the operation of the projector.

[0014] Figure 7 It is a block diagram showing the configuration of a wireless communication system according to the second embodiment.

[0015] Description of symbols

[0016] 1: Wireless communication system; 1A: Wireless communication system; 1B: Wireless communication system; 100: Information processing device; 110: Wireless communication unit; 120: IP operation unit; 130: IP display unit; 131: Touch panel; 133: Application screen; 133A: Profile setting icon; 133C: Display start icon; 133B: Connection icon; 133D: Disconnect icon; 150: IP control unit; 160: IP storage unit; 161: Connection AP; 170: IP processing unit Processor; 180: interface; 200: projector; 210: first wireless communication unit; 220: second wireless communication unit; 230: PJ operation unit; 240: image processing unit; 250: image projection unit; 251: light source; 253: light modulation device; 255: optical unit; 260: PJ control unit; 270: PJ storage unit; 271: first connection information; 272: second connection information; 273: third connection information; 280: PJ processor; 300: wireless communication device. DETAILED DESCRIPTION

[0017] [First embodiment]

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] [Description of System Configuration of Wireless Communication System 1A]

[0020] Figure 1 1 is a block diagram showing the system configuration of the wireless communication system 1A.

[0021] The wireless communication system 1A includes an information processing device 100 and a projector 200 as a display device.

[0022] The information processing device 100 is, for example, a notebook computer, a tablet computer, a smartphone, etc. The information processing device 100 is wirelessly connected to the projector 200 , and transmits data such as image data to the projector 200 .

[0023] The projector 200 processes data received from the information processing device 100 or generates image light based on the received image data, and projects the generated image light onto a projection surface (not shown).

[0024] [Description of Configuration of Information Processing Device 100]

[0025] The configuration of the information processing device 100 will be described.

[0026] The information processing apparatus 100 includes a wireless communication section 110 , an IP operation section 120 , an IP display section 130 , and an IP control section 150 .

[0027] The wireless communication unit 110 corresponds to a third wireless communication unit. The wireless communication unit 110 is wirelessly connected to the projector 200 and performs data communication with the projector 200 .

[0028] The IP operation unit 120 is composed of an input device such as a mouse or a keyboard, and receives an operation from a user. The IP operation unit 120 outputs an operation signal corresponding to the received operation to the IP control unit 150 .

[0029] The IP display unit 130 includes a touch panel 131 including a display panel such as a liquid crystal panel or an organic EL (Electro-Luminescence) panel, and a sensor for detecting a touch operation on the display panel.

[0030] The IP control unit 150 includes an IP storage unit 160 and an IP processor 170 .

[0031] The IP storage unit 160 includes a main storage device such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and also includes an auxiliary storage device such as an SSD (Solid State Drive) and an HDD (Hard Disk Drive).

[0032] The RAM is used for temporary storage of various data, and the ROM stores control programs for controlling the operation of the information processing device 100, various setting information, and the like. The control program includes an application program. In particular, the information processing device 100 of this embodiment stores an application program used for wireless connection with the projector 200. The application program is expressed as a connection AP 161. The auxiliary storage device stores data such as image data supplied to the projector 200.

[0033] The IP processor 170 is a calculation processing device such as a CPU (Central Processing Unit) or an MPU (MicroProcessing Unit). The IP processor 170 executes a control program to control each part of the information processing device 100. The IP processor 170 may be composed of a single processor or a plurality of processors.

[0034] When the IP control unit 150 receives an operation of selecting the connection AP 161 through the operation of the IP operation unit 120 or the touch operation, the selected connection AP 161 is executed, and the application screen 133 is displayed on the touch panel 131. When the IP control unit 150 receives an operation on the application screen 133, it controls each part of the information processing device 100 according to the received operation. For example, the IP control unit 150 sends a connection request to the projector 200 and wirelessly connects to the projector 200. In addition, the IP control unit 150 reads image data from the IP storage unit 160 and sends the read image data to the wirelessly connected projector 200.

[0035] Figure 2 , Figure 3 and Figure 4 1 is a diagram showing an example of application screen 133 displayed on touch panel 131 .

[0036] Figure 2 1 is a diagram showing an initial screen displayed when the connection AP 161 is first activated. A profile setting icon 133A is displayed on the initial screen of the application screen 133.

[0037] When the profile setting icon 133A is selected, the IP control unit 150 causes the application screen 133 to display the information of the SSID received by the wireless communication unit 110. When the first SSID described later is selected from the SSIDs displayed on the application screen 133, the IP control unit 150 sends a connection request to which the preset extended information is given to the projector 200. Thereafter, the IP control unit 150 performs data communication with the projector 200, and acquires the second SSID and encryption key described later as the profile of the connection AP 161 from the projector 200. The IP control unit 150 stores the acquired second SSID and encryption key as the profile of the connection AP 161 in the IP storage unit 160. The details of this process will be described later.

[0038] Figure 3 This is a diagram showing a state where a connection icon 133B for wirelessly connecting the information processing device 100 and the projector 200 is displayed.

[0039] When the connection icon 133B is selected, the IP control unit 150 refers to the second SSID and the encryption key registered as the profile of the connection AP 161, and transmits a connection request to the first wireless communication unit 210 operating as the access point of the second SSID. Thereafter, when the IP control unit 150 is requested to transmit the encryption key from the projector 200, it transmits the encryption key registered as the profile to the projector 200 and receives authentication from the projector 200. When the authentication of the encryption key succeeds, the information processing device 100 is wirelessly connected to the first wireless communication unit 210.

[0040] Figure 4 1 is a diagram showing an application screen 133 displayed on the touch panel 131 when the information processing device 100 is wirelessly connected to the projector 200. The application screen 133 displays a display start icon 133C for starting to supply image data to the projector 200 and causing the projector 200 to start displaying an image, and a disconnection icon 133D for disconnecting the wireless connection with the projector 200.

[0041] [Description of the Structure of Projector 200]

[0042] Next, the structure of the projector 200 will be described.

[0043] The projector 200 includes a first wireless communication unit 210 , a second wireless communication unit 220 , a PJ operation unit 230 , an image processing unit 240 , an image projection unit 250 , and a PJ control unit 260 .

[0044] The first wireless communication unit 210 performs wireless communication via a wireless LAN based on, for example, 802.11, which is a standard of the IEEE (Institute of Electrical and Electronics Engineers). The second wireless communication unit 220 also performs wireless communication via a wireless LAN based on IEEE 802.11.

[0045] The PJ operation unit 230 includes a plurality of operation keys for the user to give various instructions to the projector 200. The operation keys provided by the PJ operation unit 230 include a power key for switching the power on and off, a change key for changing the operation mode of the projector 200, and the like. The projector 200 includes a normal mode and a pairing mode as operation modes. The normal mode is a mode in which the projector 200 generates image light based on image data received from the outside and projects the generated image light onto a projection surface. The pairing mode is an operation mode in which the first wireless communication unit 210 is paired with an external device such as the information processing device 100.

[0046] The image data is input from the PJ control unit 260 to the image processing unit 240. The image data received by the first wireless communication unit 210 or the second wireless communication unit 220 is input to the PJ control unit 260. The PJ control unit 260 outputs the input image data to the image processing unit 240. At this time, the PJ control unit 260 may output parameters corresponding to the image processing to be performed by the image processing unit 240 to the image processing unit 240.

[0047] The image processing unit 240 expands the input image data in a frame memory (not shown) and performs image processing on the expanded image data. The image processing performed by the image processing unit 240 includes, for example, resolution conversion processing, shape correction processing such as distortion correction, digital zoom processing, color tone correction processing, brightness correction processing, etc. The image processing unit 240 performs the processing specified by the PJ control unit 260 and performs the processing using the parameters input from the PJ control unit 260 as needed. In addition, the image processing unit 240 can also perform a plurality of the above-mentioned processing in combination. The image processing unit 240 reads the processed image data from the frame memory and outputs the read image data as image information to the image projection unit 250.

[0048] The image projection unit 250 includes a light source 251, a light modulator 253, an optical unit 255, and the like. Image information is input to the light modulator 253 from the image processing unit 240. The light modulator 253 modulates the light emitted from the light source 251 into light corresponding to the image information to generate image light. The modulated image light is enlarged by the optical unit 255 and projected onto the projection surface.

[0049] The PJ control unit 260 is a computer device including a PJ storage unit 270 and a PJ processor 280 .

[0050] The PJ storage unit 270 includes a main storage device such as a RAM and a ROM. The RAM is used to temporarily store various data and the like, and the ROM stores a control program for controlling the operation of the projector 200, various setting information, and the like.

[0051] The setting information stored in the PJ storage unit 270 includes first connection information 271 , second connection information 272 , and third connection information 273 .

[0052] The first connection information 271, the second connection information 272, and the third connection information 273 respectively include an SSID (Service Set Identifier) ​​as an identification name of an access point and an encryption key. Hereinafter, the SSID included in the first connection information 271 is referred to as a first SSID, the SSID included in the second connection information 272 is referred to as a second SSID, and the SSID included in the third connection information 273 is referred to as a third SSID.

[0053] The first connection information 271 and the second connection information 272 are information for wireless connection with the first wireless communication unit 210. When the operation mode of the projector 200 is changed from the normal mode to the pairing mode, the first wireless communication unit 210 operates as an access point of the first SSID. In addition, when the operation mode of the projector 200 is changed from the pairing mode to the normal mode, the first wireless communication unit 210 ends the operation as the access point of the first SSID and operates as the access point of the second SSID. The first SSID is public and broadcast by the first wireless communication unit 210, but the second SSID is a private stealth SSID and is not broadcast by the first wireless communication unit 210.

[0054] The first connection information 271 is connection information used for temporary connection, and the second connection information 272 is connection information used for regular connection.

[0055] The third connection information 273 is information for wireless connection with the second wireless communication unit 220. The second wireless communication unit 220 operates as an access point of the second SSID. Even if the operation mode of the projector 200 is changed from the normal mode to the pairing mode, or from the pairing mode to the normal mode, the second wireless communication unit 220 operates as an access point of the second SSID. The third SSID is public and broadcast by the second wireless communication unit 220. The third connection information 273 is connection information for formal connection.

[0056] The PJ processor 280 is a calculation processing device such as a CPU or an MPU. The PJ processor 280 executes a control program to control each part of the projector 200. The PJ processor 280 may be composed of a single processor or a plurality of processors.

[0057] The PJ control unit 260 controls the first wireless communication unit 210 and the second wireless communication unit 220 to cause these wireless communication units to perform wireless communication.

[0058] When the projector 200 is powered on, the PJ control unit 260 causes the second wireless communication unit 220 to broadcast a beacon signal including the third SSID. The PJ control unit 260 causes the second wireless communication unit 220 to broadcast a beacon signal including the third SSID while the projector 200 is powered on.

[0059] When receiving a connection request to the second wireless communication unit 220 operating as an access point of the third SSID, the PJ control unit 260 requests the transmission source of the received connection request to transmit an encryption key, and authenticates the encryption key received from the transmission source. When the authentication of the encryption key succeeds, the PJ control unit 260 wirelessly connects the transmission source of the connection request to the second wireless communication unit 220. Thus, the transmission source of the connection request and the second wireless communication unit 220 start a formal connection using the third connection information 273.

[0060] When the operation mode of the projector 200 is changed from the normal mode to the pairing mode, the PJ control unit 260 causes the first wireless communication unit 210 to broadcast a beacon signal including the first SSID. The PJ control unit 260 causes the first wireless communication unit 210 to broadcast a beacon signal including the first SSID until the operation mode of the projector 200 is changed to the normal mode.

[0061] When receiving a connection request to the first wireless communication unit 210 operating as an access point of the first SSID, the PJ control unit 260 determines whether the connection request includes the pre-set extended information. The PJ control unit 260 determines whether the connection request includes the pre-set extended information and determines whether the source satisfies the pre-set conditions. If the connection request does not include the extended information, the PJ control unit 260 rejects the connection request received by the first wireless communication unit 210 and does not allow the source of the connection request to be wirelessly connected to the first wireless communication unit 210.

[0062] In addition, when the connection request received by the first wireless communication unit 210 includes the preset extended information, the PJ control unit 260 requests the transmission of the encryption key from the transmission source of the connection request, and authenticates the encryption key received from the transmission source. When the authentication of the encryption key succeeds, the PJ control unit 260 transmits the second SSID and the encryption key included in the second connection information 272 to the transmission source of the connection request.

[0063] When receiving the second SSID and the encryption key from the projector 200 , the IP control unit 150 stores the second SSID and the encryption key in the IP storage unit 160 as a configuration file of the connection AP 161 .

[0064] When the connection AP 161 is selected and started and the connection icon 133B is selected, the IP control unit 150 sends a connection request to the first wireless communication unit 210 operating as the access point of the second SSID. When the first wireless communication unit 210 receives the connection request, the PJ control unit 260 requests the information processing device 100, which is the source of the connection request, to send an encryption key and authenticates the received encryption key. When the authentication of the encryption key succeeds, the PJ control unit 260 wirelessly connects the information processing device 100 to the first wireless communication unit 210. Thus, the information processing device 100 and the first wireless communication unit 210 of the projector 200 start a formal connection using the second connection information.

[0065] In addition, when the number of information processing devices 100 wirelessly connected to the first wireless communication unit 210 increases, the PJ control unit 260 connects a preset number of information processing devices 100 from the information processing devices 100 wirelessly connected to the first wireless communication unit 210 to the second wireless communication unit 220. When the communication speed of the first wireless communication unit 210 decreases below a preset reference value, the PJ control unit 260 selects a preset number of information processing devices 100 from the wirelessly connected information processing devices 100. The PJ control unit 260 transmits the second SSID and encryption key of the second wireless communication unit 220 to the selected information processing device 100, and wirelessly connects the set number of information processing devices 100 to the second wireless communication unit 220. Thus, it is possible to suppress the degradation of the communication quality of the first wireless communication unit 210.

[0066] [Operation of Information Processing Device 100]

[0067] Figure 5 It is a flowchart showing the operation of the information processing device 100 .

[0068] Reference Figure 5 The operation of the information processing device 100 will be described.

[0069] First, IP control unit 150 determines whether connecting AP 161 is selected by operation of IP operation unit 120 or touch operation of the touch panel (step S1). If connecting AP 161 is not selected (step S1 / No), IP control unit 150 does not start processing until connecting AP 161 is selected.

[0070] When connection AP 161 is selected (step S1 / Yes), IP control unit 150 executes connection AP 161 and displays application screen 133 on touch panel 131. Next, IP control unit 150 displays a list of SSIDs included in the beacon signal received by wireless communication unit 110 on application screen 133 (step S2).

[0071] The IP control unit 150 determines whether the first SSID is selected from the plurality of SSIDs displayed on the application screen 133 (step S3). If the first SSID is not selected (step S3 / No), the IP control unit 150 ends the processing flow.

[0072] When the first SSID is selected (step S3 / Yes), the IP control unit 150 transmits a connection request including the identification information of the connection AP 161 to the access point of the selected first SSID (step S4 ).

[0073] Next, the IP control unit 150 determines whether the second SSID and encryption key are received from the access point of the first SSID (step S5). If the second SSID and encryption key are not received (step S5 / No), the IP control unit 150 waits until the second SSID and encryption key are received.

[0074] Furthermore, when receiving the second SSID and the encryption key, the IP control unit 150 stores the received second SSID and the encryption key in the IP storage unit 160 as a configuration file of the connection AP 161 .

[0075] Next, the IP control unit 150 sends a connection request to the access point of the second SSID (step S7), and waits until a request for an encryption key is received (step S8). When the IP control unit 150 receives a request to send an encryption key (step S8 / yes), it sends the encryption key stored in the IP storage unit 160 as a configuration file of the connection AP 161 to the projector 200 of the request source (step S9). After that, the projector 200 performs authentication based on the encryption key received from the information processing device 100. When the projector 200 is successfully authenticated, the information processing device 100 starts wireless communication via the first wireless communication unit 210 as the access point of the second SSID (step S10).

[0076] [Projector Movement]

[0077] Figure 6 : is a flowchart showing the operation of the projector 200 .

[0078] Reference Figure 6 The flowchart shown explains the operation of the projector 200 .

[0079] First, the PJ control unit 260 determines whether the change key of the PJ operation unit 230 is operated and the operation mode of the projector 200 is changed from the normal mode to the pairing mode (step S21). When the operation mode has not been changed (step S21 / No), the PJ control unit 260 moves to the determination of step S30. The operation of the PJ control unit 260 after step S30 will be described later.

[0080] When the operation mode is changed to the pairing mode (step S21 / Yes), the PJ control unit 260 causes the first wireless communication unit 210 to broadcast a beacon signal including the first SSID (step S22). Then, the PJ control unit 260 determines whether the first wireless communication unit 210, which is an access point of the first SSID, has received a connection request (step S23).

[0081] When the PJ control unit 260 does not receive the connection request (step S23 / No), it moves to the determination of step S27 to determine whether the operation mode of the projector 200 has been changed to the normal mode (step S27). When the operation mode has been changed to the normal mode (step S27 / Yes), the PJ control unit 260 causes the first wireless communication unit 210 to end the broadcast of the beacon signal including the first SSID (step S28). In addition, when the operation mode has not been changed to the normal mode (step S27 / No), the PJ control unit 260 returns to the determination of step S23.

[0082] When the PJ control unit 260 receives the connection request (step S23 / Yes), it determines whether the received connection request includes the extended information (step S24). When the received connection request does not include the extended information (step S24 / No), the PJ control unit 260 rejects the connection request received in step S23 (step S25).

[0083] When the received connection request includes extended information (step S24 / Yes), the PJ control unit 260 sends the second SSID and encryption key included in the second connection information 272 to the source of the connection request (step S26). Then, the PJ control unit 260 determines whether the operation mode has been changed to the normal mode (step S27). When the operation mode has not been changed to the normal mode (step S27 / No), the PJ control unit 260 returns to the determination of step S23. In addition, when the operation mode is changed to the normal mode (step S27 / Yes), the PJ control unit 260 causes the first wireless communication unit 210 to end the broadcast of the beacon signal containing the first SSID (step S28). Then, the PJ control unit 260 causes the first wireless communication unit 210 to operate as an access point of the second SSID (step S29).

[0084] Next, the PJ control unit 260 determines whether the first wireless communication unit 210 operating as the access point of the second SSID has received the connection request (step S30). If the connection request has not been received (step S30 / No), the PJ control unit 260 returns to the determination of step S21. If the connection request has been received (step S30 / Yes), the PJ control unit 260 requests the transmission source of the connection request to transmit the encryption key (step S31), and waits until the encryption key is received (step S32).

[0085] When receiving the encryption key (step S32 / Yes), the PJ control unit 260 authenticates the received encryption key (step S33). When the encryption key authentication fails (step S33 / No), the PJ control unit 260 requests the encryption key again (step S31). When the encryption key authentication succeeds (step S33 / Yes), the PJ control unit 260 wirelessly connects the first wireless communication unit 210 and the source of the connection request to start wireless communication (step S34).

[0086] As described above, the wireless communication system 1A includes the information processing device 100 and the projector 200 .

[0087] The projector 200 includes a first wireless communication unit 210 that performs wireless communication.

[0088] The projector 200 transmits the first SSID of the first connection information 271 as connection information for temporary connection through the first wireless communication unit 210 .

[0089] When receiving a connection request via the first wireless communication unit 210 operating as an access point of the first SSID, the projector 200 determines whether the transmission source of the received connection request is a transmission source that satisfies a preset condition.

[0090] When the transmission source satisfies a preset condition, the projector 200 transmits the second SSID and the encryption key of the second connection information 272 to the transmission source as connection information for official connection.

[0091] Then, when receiving a connection request to the first wireless communication unit 210 operating as an access point of the second SSID, the projector 200 performs authentication using the encryption key and starts wireless communication with the source of the connection request.

[0092] Therefore, since the second SSID and the encryption key are transmitted only to the transmission source satisfying the preset condition, the number of information processing devices 100 connected to the first wireless communication unit 210 can be limited. Therefore, the degradation of the communication quality of the first wireless communication unit 210 can be suppressed.

[0093] The projector 200 includes a second wireless communication unit 220 .

[0094] The projector 200 transmits the third SSID of the third connection information 273 as connection information for formal connection through the second wireless communication unit 220 .

[0095] When receiving the connection request via the second wireless communication unit 220 operating as the access point of the third SSID, the projector 200 starts wireless communication with the source of the connection request.

[0096] Therefore, the second wireless communication unit 220 can perform wireless communication with a device other than the transmission source that satisfies the preset conditions.

[0097] When the communication speed of the first wireless communication unit 210 drops below a preset speed, the projector 200 transmits the third SSID and the encryption key included in the third connection information 273 to the information processing device 100 wirelessly connected to the first wireless communication unit 210 .

[0098] When the connection request is received by the second wireless communication unit 220 operating as an access point of the third SSID, the projector 200 wirelessly connects the source of the connection request to the second wireless communication unit 220 and starts a formal connection using the third connection information 273 .

[0099] Therefore, it is possible to suppress a decrease in the communication speed of the first wireless communication unit 210 .

[0100] When the source of the connection request executes a preset connection AP 161 and the connection request is a request issued under the control of connection AP 161, projector 200 determines that the preset condition is satisfied and transmits the second SSID and the encryption key to the source.

[0101] Therefore, the information processing device 100 equipped with the preset connection AP 161 can be wirelessly connected to the first wireless communication unit 210 operating as an access point of the second SSID.

[0102] Since the second SSID transmitted by the projector 200 through the first wireless communication unit 210 is a stealth SSID, it is possible to prevent many information processing devices 100 from being connected to the first wireless communication unit 210 operating as an access point of the second SSID.

[0103] [Second embodiment]

[0104] Figure 7 1 is a system configuration diagram showing the configuration of a wireless communication system 1B according to the second embodiment.

[0105] The wireless communication system 1B of the second embodiment also includes the information processing device 100 and the projector 200. The information processing device 100 does not include the wireless communication unit 110, but is externally connected to the interface 180 of the information processing device 100. The wireless communication device 300 may be a USB dongle having a wireless communication function, for example.

[0106] The IP control unit 150 of the second embodiment executes Figure 5 In the processing of steps S1 to S6 of the flowchart shown in the figure, the second SSID and the encryption key are received from the projector 200. At this time, the wireless communication device 300 is used for the wireless communication with the projector 200.

[0107] The IP control unit 150 stores the received second SSID and encryption key as a configuration file in a memory provided in the wireless communication device 300. Thereafter, the IP control unit 150 controls the wireless communication device 300 to send a connection request to the access point of the second SSID registered as the configuration file, accepts authentication based on the encryption key, and starts wireless communication with the first wireless communication unit 210 as the access point of the second SSID.

[0108] The wireless communication system 1B according to the second embodiment can also obtain the same effects as those of the first embodiment.

[0109] The above-mentioned embodiment is a preferred embodiment of the present invention. However, the present invention is not limited to the above-mentioned embodiment, and various modifications can be implemented within the scope of the gist of the present invention.

[0110] For example, the above Figure 5 as well as Figure 6 The process of the flowchart described in the figure may also be the following process. First, the wireless communication device 300 of the second embodiment is initially connected to the projector 200 by the user's operation. Preset identification information is pre-written in the memory of the wireless communication device 300. When the wireless communication device 300 with the pre-set identification information is connected, the PJ control unit 260 writes the second SSID and encryption key of the first wireless communication unit 210 to the connected wireless communication device 300. Thereafter, by connecting the wireless communication device 300 with the second SSID and encryption key written therein to the information processing device 100, the wireless communication device 300 is wirelessly connected to the first wireless communication unit 210 operating as an access point of the second SSID.

[0111] Regarding the preset identification information, for example, the wireless communication device 300 may be connected to the information processing device 100 in advance, the connection AP 161 may be activated, and the IP control unit 150 may write the identification information to the wireless communication device 300 under the control of the connection AP 161 .

[0112] In addition, the light modulator element of the light modulator 253 may be a transmissive liquid crystal panel or a reflective liquid crystal panel. In addition, the light modulator element may be a structure using a digital mirror device or a structure combining a digital mirror device and a color wheel. In addition, the light modulator 253 may also adopt a structure capable of modulating the light emitted by the light source other than a liquid crystal panel and a DMD.

[0113] in addition, Figure 1 The functional parts of the projector 200 shown represent functional structures, and there is no particular limitation on the specific installation method. That is, it is not necessary to install the corresponding hardware in each functional part, and of course, a structure in which the functions of multiple functional parts are realized by executing a program by a processor can also be adopted. In addition, in the above-mentioned embodiment, a part of the function realized by software can also be realized by hardware, and a part of the function realized by hardware can also be realized by software. In addition, the specific detailed structures of other parts of the projector can also be arbitrarily changed within the scope of the main purpose of the present invention.

[0114] in addition, Figure 6 The processing units of the flowchart showing the operation of the PJ control unit 260 are divided according to the main processing contents for easy understanding of the processing of the PJ control unit 260, and the present invention is not limited by the division method and name of the processing unit. Figure 5 The same is true for the flowchart showing the operation of the IP control unit 150 of the information processing device 100.

[0115] In addition, when the wireless communication control method is implemented using a computer provided in the projector 200, the program executed by the computer can also be configured in the form of a recording medium or a transmission medium for transmitting the program. The recording medium can use a magnetic, optical recording medium or a semiconductor memory device. Specifically, removable or fixed recording media such as a floppy disk, HDD (Hard Disk Drive), CD-ROM, DVD, Blu-ray Disc, optical magnetic disk, flash memory, card-type recording medium, etc. can be cited. In addition, the above-mentioned recording medium can also be a non-volatile storage device such as RAM, ROM, HDD, etc., which is an internal storage device provided in the server device. Blu-ray is a registered trademark.

Claims

1. A wireless communication control method, comprising: a display device including a first wireless communication unit and a second wireless communication unit that performs communication in the same manner as the first wireless communication unit; in, sending first connection information through the first wireless communication unit of the display device, When a connection request using the first connection information is received by the first wireless communication unit, determining whether a first transmission source that has transmitted the connection request using the first connection information satisfies a preset condition, When the first transmission source satisfies the condition, sending second connection information to the first transmission source, When a connection request using the second connection information is received by the first wireless communication unit, a connection using the second connection information is started between the first transmission source and the first wireless communication unit. When the communication speed between the first transmission source and the first wireless communication unit decreases to or below a preset speed, third connection information is transmitted to the first transmission source, When the second wireless communication unit receives a connection request using the third connection information from the first transmission source, a connection using the third connection information is started between the first transmission source and the second wireless communication unit.

2. The wireless communication control method according to claim 1, in, sending the third connection information through the second wireless communication unit, When the second wireless communication unit receives a connection request using the third connection information, a connection using the third connection information is started between the second transmission source that has transmitted the connection request using the third connection information and the second wireless communication unit.

3. The wireless communication control method according to claim 1 or 2, in, The condition is that the first transmission source executes a preset application, and the connection request using the first connection information is issued under the control of the application.

4. The wireless communication control method according to claim 1 or 2, in, broadcasting the first connection information including SSID information by the first wireless communication unit, When a connection request including SSID information is received and the source of the connection request including the SSID information satisfies the condition, the second connection information including the stealth SSID information and the encryption key is sent to the source of the connection request including the SSID information via the first wireless communication unit.

5. A display device comprising a control unit, the control unit performing the following control: sending first connection information via the first wireless communication unit, When a connection request using the first connection information is received by the first wireless communication unit, determining whether a first transmission source that has transmitted the connection request using the first connection information satisfies a preset condition, When the first transmission source satisfies the condition, sending second connection information to the first transmission source, When a connection request using the second connection information is received by the first wireless communication unit, a connection using the second connection information is started between the first transmission source and the first wireless communication unit. When the communication speed between the first transmission source and the first wireless communication unit decreases to a speed lower than a preset speed, a second wireless communication unit that performs communication in the same manner as the first wireless communication unit transmits third connection information to the first transmission source. When the second wireless communication unit receives a connection request using the third connection information from the first transmission source, a connection using the third connection information is started between the first transmission source and the second wireless communication unit.

6. The display device according to claim 5, in, The control unit transmits the third connection information for formal connection with the second wireless communication unit through the second wireless communication unit, When the connection request using the third connection information is received by the second wireless communication unit, a connection using the third connection information is started with the second transmission source that transmitted the connection request using the third connection information.

7. A wireless communication system comprising: A display device including a first wireless communication unit and a second wireless communication unit that performs communication in the same manner as the first wireless communication unit; and a wireless communication device externally connected to the information processing device, The display device sending first connection information through the first wireless communication unit, When a connection request using the first connection information is received by the first wireless communication unit, determining whether the information processing device that sent the connection request using the first connection information satisfies a preset condition, When the information processing device satisfies the condition, sending second connection information to the information processing device, The information processing device When the first connection information is received, a connection request using the first connection information is sent to the display device, When the second connection information is received from the display device, a connection based on the second connection information is started between the first wireless communication unit of the display device and the wireless communication device. the display device transmits third connection information to the wireless communication device through the second wireless communication unit when the communication speed between the wireless communication device and the first wireless communication unit decreases to or below a preset speed, When receiving the third connection information, the information processing device sends a connection request using the third connection information to the display device. When the display device receives, via the second wireless communication unit, a connection request using the third connection information based on the information processing device, the display device starts a connection between the wireless communication device and the second wireless communication unit using the third connection information.

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