WO2008041591A1

WO2008041591A1 - Radio device, image projection device, remote operation device, and image projection system

Info

Publication number: WO2008041591A1
Application number: PCT/JP2007/068711
Authority: WO
Inventors: Katsuhiro Amano; Katsura Uchida
Original assignee: Brother Kogyo Kabushiki Kaisha
Priority date: 2006-09-29
Filing date: 2007-09-26
Publication date: 2008-04-10

Abstract

It is possible to easily perform a communication connection work between a computer device and an image projection device or a remote operation device. A USB device includes a USB connector and a radio communication unit in a USB memory. Radio communication setting information can be written into the USB memory from the image projection device or the remote operation device when the USB connector is connected to the image projection device. When the connector is connected to the computer device, the radio communication setting information written from the image projection device or the remote operation device can be read out from the USB memory.

Description

Specification

Wireless device, image projection apparatus, remote control apparatus, and image projection system

TECHNICAL FIELD [0001] The present invention relates to a wireless device, an image projection device, a remote control device, and an image projection system, and in particular, an image projection having a wireless unit and projecting an image according to image data received by the wireless unit. The present invention relates to an apparatus, a remote operation device for remotely controlling the operation of the image projection device, a computer device for transmitting image data by wireless communication, a wireless device functioning as a wireless unit of the computer device, and an image projection system including these.

Background art

Conventionally, image projection devices such as projectors that input image data from a computer device or the like, display the image on a liquid crystal display element, and project the image on a projection screen by irradiating light have been widely used. Yes. There is also an image projection device that projects an image based on image data using a DMD (Digital Micromirror Device) element.

[0003] This image projection apparatus is used in various ways in small-scale presentations at conferences and large-scale presentations that gather a large number of audiences and present their research results. For such a presentation, a computer device is placed in front of the presenter, and image data corresponding to the image displayed on the display unit of the computer device is transmitted from the computer device to the image projection device via a cable. Then, the image projection device performs an enlarged projection of an image based on the image data.

[0004] By the way, in order to project an image with the image projecting device, it is necessary to connect the computer device and the image projecting device with a cable as described above. As a result, cable preparation and connection work occur and become complicated. In addition, it is necessary to prepare a cable corresponding to the distance between the computer device of the presenter and the image projection device.

[0005] Therefore, in recent years, image projection apparatuses compatible with wireless LAN (Local Area Network) such as IEEE802.lla / b / g have been provided, and transmission of image data to computer-powered image projection apparatuses. By using wireless communication, convenience is improved. [0006] By the way, in order to wirelessly connect a computer apparatus to a wireless LAN compatible image projection apparatus, it is necessary to set wireless communication for each of the computer apparatus and the image projection apparatus. However, wireless communication settings require a certain amount of knowledge and cannot be easily set. Therefore, there has been proposed one that improves the workability of the wireless communication setting.

[0007] For example, in Patent Document 1, in an image projection apparatus, wireless communication setting information such as a WEP (Wired Equipment Privacy) key is projected onto a screen, and a user of a computer apparatus projects setting information projected onto the screen. A technique for establishing a wireless connection between a computer device and an image projection device by inputting to the computer device while watching is proposed.

[0008] Further, in Patent Document 2, wireless communication setting information set in a computer device is read via a USB connector using an information storage medium provided with a USB connector, and then the information storage medium is connected to the USB connector. There has been proposed a technology for setting wireless communication setting information read from a computer device to the image projection device by connecting to the image projection device via the computer.

[0009] In Patent Document 3, a USB memory storing the same information as the wireless communication setting information in the image projection apparatus and a driver program and a wireless connection module are bundled with the image projection apparatus and sold. Then, a USB memory is connected to the computer device, the wireless communication setting information and the driver program are automatically stored in the computer device, and then the wireless connection module is connected, so that the wireless connection between the image projection device and the computer device is established. A technology to establish a connection has been proposed!

Patent Document 1: JP 2003-069923 Koyuki

Patent Document 2: JP-A-2005-202754

Patent Document 3: Japanese Patent Application Laid-Open No. 2005-285091

Disclosure of the invention

Problems to be solved by the invention

[0010] However, with the technique described in Patent Document 1, although it is possible to visually grasp the setting information of the wireless communication in the image projection device, the wireless communication to the computer device is not possible. Setting information must be done manually and requires some knowledge and time.

[0011] In addition, in the technique described in Patent Document 2, there is no need to manually input wireless communication setting information! /, Which is advantageous in that it is set in a computer device! /, Wireless communication setting Since the information is set in the image projection device, for example, when it is necessary to switch the computer device that outputs the image to be projected on the image projection device in a meeting or the like, the information provided with the USB connector in the switching destination computer device After connecting the storage medium, it is further necessary to connect to the image projection apparatus, and the work becomes complicated. In addition, encryption information such as WEP keys and settings as access points must be manually set in advance in the computer device, and a certain amount of knowledge and time are required as in the technique described in Patent Document 1. is there.

[0012] In the technique described in Patent Document 3, a USB memory storing the same information as the wireless communication setting information in the image projecting device is connected to the computer device, thereby setting the wireless communication setting in the computer device. Power that is superior to Patent Document 1 and Patent Document 2 in that it can be performed automatically. In addition to USB memory, a dedicated wireless connection module is required, so there is a problem in terms of development cost and manufacturing cost. Moreover, since the wireless communication setting information in the image projection apparatus is fixed, once wireless communication setting information leaks, there is a risk that the wireless communication between the image projection apparatus and the computer apparatus may be intercepted. There is a security problem. For example, when the image projection device is shared by multiple groups, the wireless communication setting information remains in the computer device of the first group even after the first group uses it! /. Even when the group started using the image projection device, wireless communication could be continued from the first group, causing a security problem.

Means for solving the problem

[0013] In order to solve the above-described problem, according to one aspect of the present invention, there is provided a wireless unit that receives image data transmitted from an external computer device by wireless communication, and an image corresponding to the image data. A device including an image projection apparatus that projects the image, a remote operation apparatus that remotely controls the operation of the image projection apparatus, and a wireless device that is communicably connected to the image projection apparatus or the remote operation apparatus and the converter apparatus And image projection system In the system, the image projection device or the remote control device includes means for generating wireless setting information necessary for wireless communication between the image projection device and the computer device, and means for writing the wireless setting information to the device. And the device includes means for outputting the wireless setting information written by the image projecting device or the remote control device to the computer device.

With this configuration, it is not necessary to manually set the wireless setting information necessary for wireless communication in the computer device, so that the setting time of the wireless setting information can be shortened. Based on the wireless setting information necessary for wireless communication set by the image projection device or remote control device, communication between the image projection device and the computer device can be performed. Alternatively, an image projection system can be provided.

Yes

[0015] In order to solve the above-described problem, according to another aspect of the present invention, there is provided an image projection apparatus that has a wireless unit and projects an image according to image data received by the wireless unit. An image projection system comprising: a computer device that transmits the image data to the image projection device; and a wireless device that functions as a wireless unit of the computer device. The wireless device is configured to project the image. And / or a connector that can be connected to the computer device, and when the connector is connected to the image projection device, the wireless communication setting information can be written from the image projection device, and When the connector is connected to the computer device, the wireless communication setting information written from the image projection device can be read by the computer device. A wireless communication unit that communicates with the wireless unit of the image projection device according to the setting based on the wireless communication setting information written from the image projection device when the connector is connected to the line setting information storage unit and the computer device; And a communication unit.

[0016] By configuring in this way, it is not necessary to manually set the wireless setting information necessary for wireless communication in the computer device, so the setting time of the wireless setting information can be shortened. Communication between the image projection apparatus and the computer apparatus can be performed based on setting information of wireless communication set by the image projection apparatus, and a highly confidential image projection system can be provided. [0017] In addition, a program storage unit that stores a program that causes the computer apparatus to function as an image transmission unit that transmits image data to the image projection apparatus via the wireless communication unit. You may make it the structure provided with.

With this configuration, the computer device functions as an image transmission unit that transmits image data to the image projection device via the wireless communication unit by reading and executing the program from the program storage unit. Therefore, the wireless communication setting using the wireless device can be easily performed.

[0019] In addition, the wireless device includes an image transmission stop operation unit that instructs the wireless device to stop the transmission operation of the image data to the image projection device, and the image transmission unit includes the image transmission unit. When a stop operation unit is operated, a request for causing the image projection device to project the specific image may be transmitted to the image projection device via the wireless communication unit.

[0020] With this configuration, it is possible to project a specific image from the image projecting device instead of the image data transmitted from the computer device by the operation of the user of the computer device. This is useful when you do not want to show the transmitted image data.

[0021] In addition, the wireless device may include a valid time in which the wireless communication setting function is included in the wireless communication setting information.

With this configuration, it is possible to set an effective time for wireless communication with the image projection apparatus by the wireless device by the image projection apparatus. Therefore, for example, even when an image projection device is used for a conference such as a presentation and a computer device of an unspecified number of participants is used, the computer device previously used the image projection device. It is possible to prevent image data from being erroneously transmitted from the computer apparatus to which the wireless device is attached and transmitted from the image projection apparatus.

[0023] Further, the wireless device may be provided with effective time extending means for extending the effective time stored in the wireless setting information storage unit.

With this configuration, even when a meeting such as a presentation is extended, image data of the computer device can be continuously projected from the image projection device. it can.

[0025] Further, based on the time information transmitted from the image projection apparatus and the valid time stored in the wireless setting information storage unit, the image transmitting unit transmits to the wireless device! If it is determined that the effective time has elapsed, the wireless communication unit may be deactivated.

[0026] With this configuration, the accuracy of the effective period can be improved. In other words, even if the time information generated by the computer device is incorrect, it is possible to detect the passage of the effective time based on the time information of the image projection device that has generated the effective period. Can be detected well.

[0027] Further, in order to solve the above-described problem, according to another aspect of the present invention, there is provided an image projection apparatus that includes a wireless unit and projects an image according to image data received by the wireless unit. In the image projection apparatus in an image projection system, comprising: a computer apparatus that transmits the image data to the image projection apparatus; and a wireless device that functions as a wireless unit of the computer apparatus. A connection unit capable of connecting a connector of a wireless device; and a control unit that writes setting information of the wireless communication in a wireless setting information storage unit of the wireless device when the wireless device is connected to the connection unit.

Yes

[0028] By configuring in this way, it is not necessary to manually set the wireless setting information necessary for wireless communication in the computer device, so the setting time of the wireless setting information can be shortened. Since the setting information of wireless communication is set for the wireless device by the image projecting device, and communication between the image projecting device and the computer device can be performed based on the setting information. A system can be provided.

[0029] Further, the control unit may be configured to stop the operation of the wireless unit for a predetermined period when the wireless device is connected to the connection unit.

[0030] With this configuration, in the image projection apparatus, unintended communication between the wireless device and the wireless unit can be avoided, and power consumption can be reduced by stopping the wireless unit. .

[0031] In the image projection device, the control unit may be configured such that the power source of the image projection device is O When N, when the wireless device is connected to the connection unit, the wireless communication setting information may be written to the wireless setting information storage unit of the wireless device.

With this configuration, for example, when the state in which the connector of the wireless device is connected to the image projection apparatus is the storage state of the image projection apparatus and the wireless device, the image projection apparatus can be simply turned on. , Writing to the wireless device is done, excellent convenience

[0033] The image projection apparatus further includes a writing instruction operation unit that instructs the wireless setting information storage unit of the wireless device to write setting information of the wireless communication to the wireless device, and the control unit May be configured to write the wireless communication setting information to the wireless setting information storage unit of the wireless device when the write instruction operation unit is operated.

With this configuration, wireless communication setting information can be written to the wireless device at a timing desired by the user.

[0035] Further, when the control unit determines that the identification information of the wireless device is not specific identification information! /, The control unit transmits to the setting information storage unit of the wireless device. Do not write the wireless communication setting information! / Or configure it! /.

[0036] With this configuration, only a dedicated device can be used as a wireless device.

[0037] In addition, in the image projection apparatus, the wireless communication setting information includes an encryption key in the wireless communication, and the wireless communication setting information is stored in the wireless setting information of the wireless device. A configuration information generation unit that generates at least the signal key among the wireless communication setting information may be provided before writing to the unit.

[0038] With this configuration, it is possible to reduce the risk of intercepting wireless communication between the computer apparatus and the image projection apparatus.

[0039] Further, in the image projection device, the setting information generation unit generates and updates at least the encryption key in the wireless communication setting information each time the image projection device is powered on. Anyway. [0040] With this configuration, even if the encryption key is known, it is possible to reduce the possibility that the wireless communication between the computer apparatus and the image projection apparatus will be intercepted after that. S can. In addition, since the encryption keys are different, the image data is erroneously transmitted from the computer device that has previously used the image projection device and the wireless device is attached, and is transmitted from the image projection device. Can be avoided

[0041] Further, the image projection apparatus includes an update instruction operation unit for instructing an operation for generating and updating at least the encryption key of the wireless communication setting information, and generating the setting information The unit may generate and update at least the encryption key in the wireless communication setting information each time the update operation unit is operated.

[0042] With this configuration, even if an encryption key is known, it is possible to reduce the possibility that the wireless communication between the computer apparatus and the image projection apparatus will be intercepted after that. S can. In addition, since the encryption keys are different, the image data is erroneously transmitted from the computer device that has previously used the image projection device and the wireless device is attached, and is transmitted from the image projection device. Can be avoided. Even if the encryption key is generated and updated when the power of the image projection device is turned from OFF to ON, if the image projection device is turned off, the lamp that is the light source takes time to start. For this reason, there is a case where it is not desired to turn off the power of the image projection apparatus. This is the case where an image projection device is installed in the conference room and the conference continues. Even in such a case, an update instruction operation unit is provided, which is extremely convenient.

[0043] Further, the setting information generating unit in the image projecting device, when the period during which communication with the computer device is not performed via the wireless unit becomes a predetermined period or more, The wireless communication setting information may be configured to generate and update at least the encryption key.

[0044] With this configuration, when there is no communication between the computer apparatus and the image projection apparatus for a predetermined period or longer, for example, it can be determined that one presentation has ended. Can be changed.

[0045] In the image projection apparatus, the wireless communication setting information includes the wireless device. It may include a valid period for causing the wireless communication unit in the noise to function, and the setting information generation unit may generate the valid period.

In order to solve the above-described problem, according to another aspect of the present invention, the image data includes a wireless unit that receives image data transmitted from an external computer device by wireless communication. An image projecting apparatus that projects an image according to the remote control apparatus, a remote operation apparatus that remotely controls the operation of the image projection apparatus, and a device that can communicate and connect to the computer apparatus and the remote operation apparatus! In the image projection system, the remote control device includes a wireless setting information generating unit that generates wireless setting information necessary for wireless communication between the image projecting device and the computer device, and at a predetermined timing. A wireless setting information writing unit that writes wireless setting information to the device; and a notification unit that notifies the image projection apparatus of the wireless setting information written to the device. Wherein a control unit you output the wireless setting information written to the computer system by the remote operation device.

With this configuration, the wireless setting information can be generated by the remote operation device, and the wireless setting information can be transmitted from the remote operation device to the device and the image projection device at the same time. Setting information setting time can be shortened. In addition, communication between the image projection apparatus and the computer apparatus can be performed based on the wireless communication setting information set by the remote control device, and high confidentiality! / Wireless device or image projection system can be used. Can be provided.

[0048] Further, in the image projection system, the remote operation device has a connector for connecting to the device, and the wireless setting information writing unit transmits the wireless setting information to the connector. In this case, the device may be configured to write to the device.

With this configuration, it is possible to reliably write the wireless setting information.

[0050] Further, in the image projection system, the wireless setting information generation unit may be configured to update the wireless setting information when the device is connected to the connector! /, .

[0051] With this configuration, for example, even when an image projection device is used for a conference such as a presentation and a computer device of an unspecified number of participants is used, the image projection device has been used previously. The image data was accidentally sent from the And being transmitted from the image projection apparatus can be avoided.

[0052] Further, in the image projection system, the predetermined timing may be a time when it is detected that the device is connected to the connector.

[0054] Also, in the image projection system, the remote control device includes a wireless transmission unit that transmits a wireless signal, and the device receives a wireless signal from the remote control device. The wireless setting information writing unit may be configured to write the wireless setting information to the device by transmitting the wireless setting information by a wireless signal to the device. .

With this configuration, since the wireless setting information is written into the device using a wireless signal such as an infrared signal, the wireless setting information can be easily written. Therefore, when there are a plurality of image projection apparatuses, the switching setting is facilitated.

[0056] Further, in the image projection system, the remote operation device includes a start control instruction unit for instructing start and / or stop of the image projection device, and the wireless setting The information generation unit may be configured to update the wireless setting information when the activation control instruction unit is operated.

With this configuration, the wireless setting information can be updated every time the image projection apparatus is used. Therefore, even when an image projection device is used for a conference such as a presentation and a computer device of an unspecified number of participants is used, image data is erroneously transmitted from the computer device that previously used the image projection device. Thus, transmission from the image projection apparatus can be avoided.

[0058] Further, in the image projection system, the predetermined timing may be a time when the activation control instruction unit is operated.

With this configuration, the image projection apparatus can be activated and wireless settings can be written to the device at the same time, and the image data transmitted from the computer apparatus can be projected more quickly in the image projection apparatus. Will be able to.

[0060] Further, in the image projection system, the device includes a connector connected to the computer device, and the remote device when the connector is connected to the computer device. A wireless communication unit that communicates with a wireless unit of the image projection device according to settings based on the wireless setting information written from the remote control device, and transmits image data to the image projection device via the wireless communication unit. A program storage unit that stores a program that causes the computer device to execute a function as an image transmission unit may be used.

With this configuration, when the device is connected to the computer apparatus, the computer apparatus functions as an image transmission unit that transmits image data to the image projection apparatus via the wireless communication unit. The power S makes it easy to set up wireless communication using the device.

[0062] Also, in the image projection system, the wireless setting information includes an effective time for causing the wireless communication unit to function, and the image transmitting means determines that the effective time has elapsed. Then, it can be configured to stop the function of the wireless communication unit.

[0063] With this configuration, even when the wireless setting information is not updated, unintended communication between the computer apparatus and the wireless unit can be avoided and the wireless unit can be stopped. Therefore, power consumption can be reduced.

[0064] Further, in the image projection system, the image projection apparatus receives a wireless signal from the remote control device via the wireless reception unit and the wireless reception unit from the remote control device. When the wireless setting information is received, the wireless unit is put into an operating state, and then it is determined whether wireless communication is being performed with the computer device via the wireless unit, and it is determined that wireless communication with the computer device is not being performed. A control unit that puts the radio unit into a non-operating state when the fixed state continues for a certain state.

[0065] With this configuration, it can be determined that one presentation has been completed. Accordingly, the key number can be changed for each presentation.

[0066] Also, in the image projection system, the remote control device sets the number of times that the wireless setting information writing unit can write the same wireless setting information to the device. The wireless setting information generation unit updates the wireless setting information when the wireless setting information exceeds the number of times of writing by the wireless setting information writing unit. Yo.

With this configuration, image data is transferred from a plurality of computer devices to the image projection device. Data can be transmitted, and an appropriate image projection system according to the conference can be provided.

[0068] Further, in the image projection system, the remote control device has an update suppression unit that suppresses the update of the wireless setting information by the wireless setting information generation unit, and the wireless setting information When the generation unit detects that the update suppression unit is operated, the generation unit does not update the wireless setting information! /.

[0069] With this configuration, it is possible to write the same wireless setting information to the device, and it is possible to transmit image data from a plurality of computer devices to the image projecting device, which is appropriate for the conference. It is possible to provide a simple image projection system.

The invention's effect

[0070] According to the present invention, there is provided an image projection device that has a wireless unit that receives image data transmitted by wireless communication from an external computer device, projects an image according to the image data, and the image projection. A remote operation device that remotely controls the operation of the apparatus, and an image projection device or a device that can be connected to the remote operation device and the computer device. The image projection device or the remote operation device includes the image projection device and the computer device. Information generating means for generating wireless setting information necessary for wireless communication between the devices and information writing means for writing the wireless setting information to the device. The device is written by the image projecting device or the remote control device. Since there is a control unit that outputs the embedded wireless setting information to the computer device, it is not necessary to manually set the wireless setting information necessary for wireless communication to the computer device. The setting time of the wireless setting information can be shortened, and the image projecting device and the computer device are based on the wireless setting information necessary for the wireless communication set by the image projecting device or the remote control device. It is possible to provide a highly confidential image projection system.

Brief Description of Drawings

FIG. 1 is an overall configuration diagram of an image projection system in the present embodiment.

FIG. 2 is a diagram for explaining a schematic operation in the image projection system in the present embodiment.

FIG. 3 is an external view of a wireless device in the present embodiment. 4] A block diagram of a wireless device in the present embodiment.

5] It is a functional block diagram of a wireless device in the present embodiment.

6 is a block diagram of the memory controller function unit of FIG.

FIG. 7] is a block diagram of an image projection apparatus in the present embodiment.

FIG. 8 is a flowchart for explaining the operation of the image projection apparatus in this embodiment.

FIG. 9 is a diagram showing an example of wireless setting information in the present embodiment.

10] A flowchart for explaining the operation of the image projection apparatus in the present embodiment. 11] A flowchart for explaining the operation of the image projection apparatus in the present embodiment. 12] A block diagram of the computer apparatus in the present embodiment. It is.

13] A flowchart for explaining the operation of the computer device in the present embodiment. 14] A flowchart for explaining the operation of the computer device in the present embodiment. 15] The image projection system in the other embodiment [1]. FIG.

16] FIG. 16 is a diagram for explaining a schematic operation in the image projection system in another embodiment [1].

17] It is an external view of a remote control device according to another embodiment [1].

18] It is a block diagram of a remote control device in another embodiment [1].

FIG. 19 is a flowchart of processing of wireless setting information of the remote control device in another embodiment [1].

FIG. 20] A flowchart of the update processing of the wireless setting information of the remote control device in another embodiment [1].

FIG. 21] A flowchart of the wireless setting information writing process of the remote control device in another embodiment [1].

FIG. 22 is a flowchart of processing of other wireless setting information of the remote control device in another embodiment [1]. FIG. 23] is a block diagram of an image projection device in another embodiment [1].

FIG. 24] is a flowchart for explaining the operation of the image projection apparatus in the other embodiment [1].

25] This is a flowchart for explaining the operation of the computer device in the other embodiment [1].

FIG. 26] is a flowchart for explaining the operation of the computer device in the other embodiment [1].

27] It is a block diagram of a remote control device in another embodiment [2].

[28] This is a flowchart for processing the wireless setting information of the remote control device in another embodiment [2].

FIG. 29] is a flowchart for explaining the operation of the computer device in another embodiment [2].

Explanation of symbols

1, 1, wireless device

2, 2, Remote control device

3, 3, image projection device

4, 4, computer equipment

101 CPU

102 RAM

103 ROM

104 flash memory

105, 201 USB connector

107 Wireless communication unit

108 Control panel

109 Notification Department

110 Antenna

111 RF section

112 Baseband section 123 Wireless communication function section

133 Wireless setting information

202 USB host controller

203 Infrared transmitter

204 Infrared controller

205 Operation buttons

206 Input interface

207 Display

208 memory

209 Clock circuit

210 CPU

301 Infrared receiver

302 Control panel

303 Control unit

304 Nonvolatile memory

305 Clock circuit

306 Radio unit

310 Infrared detector

311 Infrared controller

312 radio circuit

313 Wireless controller

314 USB interface

315 Setting write button

316 Update button

s, s: 'Image projection system

BEST MODE FOR CARRYING OUT THE INVENTION

(Outline of image projection system s)

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows actual results 2 is an overall configuration diagram of the image projection system S in the embodiment, FIG. 2 is a diagram for explaining a schematic operation in the image projection system S in the present embodiment, and FIG. 3 is an external view of the wireless device.

As shown in FIG. 1, the image projection system S according to the present embodiment projects an image according to image data input from the outside onto an image projection device 3 and the image projection device 3 receives the image data. A personal computer 4 for transmission (hereinafter referred to as “computer device 4”) and a wireless device 1 (hereinafter also referred to as device) which is a USB dongle that functions as a wireless unit of the computer device 4 are provided. The computer apparatus 4 transmits image data to the image projection apparatus 3 through the wireless device 1 by connecting a USB connector 105 (see FIGS. 3 and 4) described later in the wireless device 1. The image projection device 3 receives image data transmitted by wireless communication from the computer device 4 via the wireless device 1, and projects an image corresponding to the image data onto the screen.

Here, the wireless communication between the image projecting device 3 and the wireless device 1 is performed so that the image projection is performed so that the wireless LAN (Local Area Network) standard such as IEEE802.l la / b / g can be satisfied. Each of the shadowing device 3 and the wireless device 1 has a wireless unit compliant with the wireless LAN standard.

[0076] In a wireless LAN, settings for performing wireless communication must be made in advance as described above. The wireless communication setting information (hereinafter referred to as “wireless setting information”) that must be set is SSID (Extended Service Set Identifier), which is the network name, and WEP (Wired Equipment), which is the key. Privacy) key, etc., cannot be set without some knowledge, and the work is complicated.

Therefore, in the image projection system S according to the present embodiment, the wireless device 1 is provided with a wireless setting information storage unit that stores the wireless setting information, thereby automatically setting the wireless setting information. I am going to do that. In addition, the encryption key is changed at a predetermined timing to improve confidentiality.

Here, a procedure for setting wireless communication in the image projection system S will be briefly described. FIG. 2 is a diagram for explaining a wireless communication setting procedure in the present embodiment.

[0079] As shown in FIG. 2 (a), the USB connector 105 of the wireless device 1 is connected to the US of the image projection device 3. Connect to B interface 314. When the image projection apparatus 3 detects that the wireless device 1 is connected via the USB interface 314, the image projection apparatus 3 uses the information writing unit to transmit wireless setting information necessary for communication by the wireless unit of the image projection apparatus 3 to the USB. Write to the storage unit of wireless device 1 via interface 314. At this time, the writing lamp 150 (see FIG. 3) of the wireless device 1 blinks to inform that the wireless setting information is being written. The wireless setting information is generated using an information generating unit.

[0080] The timing for writing the wireless setting information used in the wireless unit of the image projection apparatus 3 is as follows: (a) When the wireless device 1 is connected to the image projection apparatus 3, (b) The power of the image projection apparatus 3 is turned on. When the wireless device 1 is connected to the image projection device 3 or (c) a setting write button 315 (see FIGS. 1 and 2) as a write instruction operation unit provided in the image projection device 3 When operated.

Note that when the wireless device 1 is not a specific device, the wireless setting information is not written. This means that if the connected device is written to any device, the operation of the image projection system S will become unstable due to an inferior product (such as a copy product) of the poor wireless device 1. In order to avoid this, only a dedicated device can be used as a wireless device. Connected device power Whether the device is a dedicated wireless device 1 or not is determined by the image projector 3. The identification information given to the device can be read from the device, and for example, it can be determined by detecting that the part of the identification information indicating the manufacturer is specific information.

[0082] When the writing of the wireless setting information to the wireless device 1 is completed, the flashing of the writing lamp 150 is terminated. Therefore, as shown in FIG. 2 (b), the wireless device 1 is detached from the image projector 3, This time, it connects to the USB interface 401 of the computer device 4.

[0083] When the wireless device 1 is connected to the computer device 4, the computer device 4 is connected to a device driver program (hereinafter abbreviated as "device dryer") stored in the wireless device 1, a wireless setting application program (hereinafter referred to as "device driver"). , “Wireless setting application”) and image transfer application program (hereinafter abbreviated as “image transfer application”). The control unit of the computer device 4 retrieves the wireless setting information from the storage unit of the wireless device 1 by executing the wireless setting application, and stores the wireless setting information. Set the wireless communication part of wireless device 1 using the device driver. The control unit of the computer device 4 functions as an image transmission unit that transmits image data to the image projection device 3 via the wireless communication unit by executing the image transfer application.

As described above, the wireless setting information of the image projection device 3 and the wireless device 1 can be matched, and wireless communication between the image projection device 3 and the wireless device 1 becomes possible. Thereafter, as shown in FIG. 2 (c), image data is transmitted from the computer apparatus 4 to the image projection apparatus 3 via the wireless device 1 by executing the image transfer application of the computer apparatus 4, and the image projection apparatus 3 An image based on the image data is projected on the screen.

Further, as shown in FIG. 3, the wireless device 1 is provided with an image transfer stop switch 140 as an image transmission stop operation unit. When this image transfer stop switch 140 is operated, the image transfer application of the computer device 4 detects the operation, stops the transfer of the display screen, and wirelessly sends a request for projecting a specific image from the image projection device 3. The image is transmitted to the image projector 3 via the device 1. When receiving this request, the image projection device 3 projects a specific image. This specific image is an image based on the image data stored in the image projection device 3 and can be, for example, a black image, a landscape image, an image on which a ΓΝο signal is projected, or the like. Thereby, the user of the computer device 4 can easily stop the image transfer from the computer device 4, and it is possible to avoid the trouble of switching the screen of the computer device 4.

Further, the wireless setting information set in the wireless device 1 by the image projecting device 3 includes an effective time during which the wireless unit (wireless communication unit 107 described later) of the wireless device 1 functions. The image transfer application of the computer device 4 limits the time during which wireless communication by the wireless unit of the wireless device 1 can be performed by reading the effective time.

[0087] Further, as shown in FIG. 3, the wireless device 1 is provided with a communication time extension button 141 as an effective time extension means for extending the effective time, and the communication time extension button 141 is operated. Then, the image transfer application of the computer device 4 detects the operation, and changes it so that the valid time read from the wireless device 1 is extended.

The image transfer application of the computer device 4 has a function of receiving time information transmitted from the image projection device 3, and reads out the time information and the wireless device 1. Based on the valid time, it is determined that the valid time has elapsed. When it is determined that the valid time has elapsed, the function of the wireless communication unit of the wireless device 1 is stopped.

By the way, if the wireless setting information written in the wireless device 1 by the image projection apparatus 3 is always constant, it is not preferable in terms of security. In addition, unintended image data may be transmitted to the image projection device 3 from the computer device 4 that has forgotten to remove the wireless device 1. Therefore, the image projection device 3 updates at least the encryption key in the wireless setting information.

The timing at which the image projection device 3 updates the wireless setting information is (a) when the power of the image projection device 3 is switched from OFF to ON, or (b) an update operation provided in the image projection device 3 When the update button 316 (see FIG. 1 and FIG. 2) as a part is operated, (c) when the period during which communication between the wireless device 1 and the computer device 4 is not performed becomes a predetermined period or more, etc. Ah

(Description of configuration and operation of each device)

The image projection system S configured as described above will be described in more detail with respect to its configuration and operation. Hereinafter, specific configurations and operations of the wireless device 1, the image projection device 3, and the computer device 4 according to the embodiment of the present invention will be described.

[0092] (About wireless devices)

First, the configuration and operation of the wireless device 1 will be described. 4 is a block diagram of the wireless device 1, FIG. 5 is a functional block diagram of the wireless device 1, and FIG. 6 is a block diagram of the memory controller function unit.

As shown in FIG. 4, the wireless device 1 includes a CPU (Central Processing Unit) 101, a RAM (Random Access Memory) 102, a ROM (Read Only Memory) 103, a flash memory 104, a USB connector 105, a USB connection circuit. 106, a wireless communication unit 107, an operation unit 108, a notification unit 109, and the like, and are designed to be portable and compact.

The CPU 101 functions as a control unit of the wireless device 1 by reading and executing a control program stored in the ROM 103. The ROM 103 stores identification information (for example, a MAC address), and the identification information can be transmitted to the image projection apparatus 3 and the computer apparatus 4 through the USB connector 105 under the control of the CPU 101. it can. The RAM 102 is used as a working memory or the like by the CPU 101. Further, the flash memory 104 functions as a wireless setting information storage unit that stores wireless setting information and the like.

[0096] Here, the wireless setting information includes, as shown in FIG. 9, wireless LAN standard type (band), network mode, network name (ESSID), wireless channel, authentication level, encryption level, data Includes encryption method, key number, IP address, subnet mask, DNS address, valid time, etc. The network mode includes an infrastructure mode that requires an access point and an ad hoc mode that does not require an access point. In this mode, wireless communication can be performed directly between the wireless device 1 and the image projector. Is set to ad hoc mode.

The USB connector 105 is a general-purpose USB connector and can be connected to the USB connectors of the image projection device 3 and the computer device 4. When the USB connector 105 is connected to the image projection device 3 or the computer device 4, the CPU 101 transmits / receives data to / from these devices via the USB connection circuit 106. The USB connection circuit 106 is an interface circuit for transmitting and receiving data in accordance with the USB standard.

When the USB connector 105 is connected to the image projection device 3, the CPU 101 controls the wireless memory 104 so that wireless setting information can be written from the image projection device 3. Further, when the USB connector 105 is connected to the computer apparatus 4, the CPU 101 is controlled so that the wireless setting information written in the flash memory 104 can be read by the computer apparatus 4.

[0099] The wireless communication unit 107 includes an antenna 110, an RF unit 111, and a baseband unit 112, and can transmit and receive data based on the wireless LAN standard. The RF unit 11 is used.

[0100] When the USB connector 105 is connected to the computer device 4, the wireless communication unit 107 communicates with the wireless unit of the image projection device according to settings based on the wireless setting information written from the image projection device 3. Here, the wireless setting information written from the image projection device 3 is first read into the computer device 4, and the wireless setting information read in this way is combined. The wireless communication unit 107 transmits the wireless setting information from the image projection device 3 to the wireless device 1 and transmits wireless communication according to the wireless setting information. There is a method for causing the communication unit 107 to perform wireless communication in accordance with the wireless setting information. Here, the former method will be described as an example.

[0101] The operation unit 108 includes an image transfer stop switch 140, a communication time extension button 141, a reset button 142 (see FIG. 3), and the like. When these buttons are operated, the CPU 101 performs the operation. Detect and perform processing according to the detected operation.

[0102] The image transfer stop switch 140 is a slide switch (corresponding to an example of an image transmission stop operation unit) for instructing stop of the transmission operation of the image data to the image projection device 3, and includes an image stop ON mode, This is a switch to switch between image stop and OFF modes. When this image transfer stop switch 140 is operated to the image stop ON mode side while connected to the computer device 4 via the USB connector 105, the CPU 101 notifies the computer device of the information to that effect. To do. When the CPU 405 of the computer apparatus 4 receives the information, it executes a request for causing the image projection apparatus to project a specific image (here, a black screen image) via the wireless communication unit 107 by executing the image transfer application. Send to image projection device 3.

Note that when the image transfer stop switch 140 is operated to the image stop ON mode side while being connected to the computer apparatus 4 via the USB connector 105, the CPU 101 is input from the computer apparatus 4. Instead of transmitting data to the image projection device 3, a request for causing the image projection device 3 to project a specific image may be transmitted to the image projection device 3 via the wireless communication unit 107! /.

[0104] The communication time extension button 141 is an operation button (corresponding to an example of an effective time extension means) for changing the effective time in the wireless setting information stored in the flash memory 104, and is a push button type switch. is there. When the communication time extension button 141 is operated (pressed) while connected to the computer device 4 via the USB connector 105, the CPU 101 extends the effective time for wireless communication with the image projection device 3. Perform the process. In this process, the CPU 101 notifies the computer apparatus 4 that the communication time extension button 141 has been operated to the image stop ON mode side, and the computer apparatus 4 is taken out from the wireless device 1. By extending the valid time. That is, the computer device 4 reads the effective time written in the flash memory 104 of the wireless device 1 and stores it in the storage unit of the computer device 4 when performing wireless communication with the image projection device 3. In this way, it is determined whether or not the stored valid time has elapsed. The effective time is extended by changing the stored effective time.

[0105] The valid time is extracted from the wireless setting information stored in the flash memory 104 by the CPU 101, and the extended time (for example, 1 hour) is added to this valid time to overwrite the valid time stored in the flash memory 104. By doing so, the effective time may be extended. In this case, the CPU 405 of the computer apparatus 4 reads the valid time from the wireless device 1 every time it determines whether the valid time has elapsed.

[0106] The notification unit 109 includes a writing lamp LED 150, an image transfer lamp 151, an alarm lamp 152 (see Fig. 3), and the CPU 101 lights or blinks these lamps depending on the situation. Let For example, when the wireless setting information is being written to the flash memory 104, the writing lamp LED 150 is blinked. Further, when image data is being transmitted from the computer apparatus 4 to the image projection apparatus 3, the image transfer lamp 151 is blinked. When the wireless device 1 is in an abnormal state, the alarm lamp 152 is blinked. These lamps are composed of LEDs or the like.

Here, FIG. 5 shows a functional block diagram of the wireless device 1. As shown in FIG. 5, the wireless device 1 includes a USB interface function unit 120, a memory controller function unit 121, a USB hub function unit 122, and a wireless communication function unit 123.

[0108] The USB interface function unit 120 corresponds to the USB connector 105 and the USB connection circuit 106 in FIG. 4, and transmits / receives data to / from the image projecting device 3 and the computer device 4 based on the USB standard. Do.

The memory controller function unit 121 corresponds to the CPU 101 and the flash memory 104 in FIG. 4, and includes a removal recognition unit 124 and a flash memory 104 that function the flash memory 104 as a USB memory for storing wireless setting information. And a CD-ROM recognition unit 125 for functioning as a CD-ROM for transferring the image transfer program to the computer device 4, and the wireless device 1 is connected to the image projection device 3 and the USB hub function unit 122. The computer 4 is recognized as a USB memory and a CD-ROM.

[0110] The wireless communication function unit 123 corresponds to the wireless communication unit 107 in FIG. 4, and is controlled by driver software installed in the computer device 4 when the USB connector 105 of the wireless device 1 is connected to the computer device 4. Is done.

[0111] As shown in FIG. 6, the memory controller function unit 121 includes a removal recognition unit 124 and a CD-ROM recognition unit 125, as well as a radio setting application in the physical memory unit (part of the flash memory 104). A plurality of application programs 130 such as an image transfer application, a device driver 131, an installer program 132, and wireless setting information 133 are stored. Note that the flash memory 104 as a physical memory unit may be configured by one flash memory or a plurality of flash memories.

[0112] When the image transfer application is installed in the computer device 4, the computer device 4 controls the wireless device 1 to transmit image data from the computer device 4 to the image projection device 3. It functions as a means.

Further, the device driver 131 causes the computer apparatus 4 to execute a function of controlling the wireless communication unit 107 of the wireless device 1 by being installed in the computer apparatus 4.

[0114] The wireless setting application is installed in the computer apparatus 4 to cause the computer apparatus 4 to execute a function of setting wireless setting information or the like in the wireless device 1.

[0115] The installer program 132 is executed by the computer apparatus 4 to install the image transfer application 130 and the device driver 131 in the computer apparatus 4.

[0116] (Image projection device 3)

As shown in FIG. 7, the image projection device 3 has a USB connector (corresponding to an example of a connection unit), a USB interface 314 that performs communication based on the USB standard, and a control panel 302 that performs various operations. A control unit 303 that controls the entire image projection apparatus 3, a non-volatile memory 304 that holds information such as wireless setting information, and a clock circuit 30 that is a time measuring means. 5, a wireless unit 306 that performs wireless communication compliant with the wireless LAN standard, a video signal input circuit 307 that inputs a video signal from the outside, and a video signal or wireless unit 306 that is input via the video signal input circuit 307 A projection unit 308 that projects an image based on the image data received via the image data, and these are built in the housing.

[0117] The USB connector of the USB interface 314 may be force ^s to connect the USB connector of the wireless device 1. The control unit 303 detects whether or not the USB connector 105 of the wireless device 1 is connected to the USB interface 314. If the USB connector 105 is connected, the control unit 303 transmits and receives data to and from the wireless device 1.

[0118] The control panel 302 is provided at a position where the user can operate the image projection apparatus 3, that is, at a suitable position on the outer wall surface of the housing, and when the user operates the control panel 302, the control panel 302 The control unit 303 executes control according to the operation content. On the control panel 302, the above-described setting write button 315 (corresponding to an example of a write instruction operation unit), update button 316 (corresponding to an example of an update operation unit), and the like are arranged.

[0119] The control unit 303 includes a CPU, ROM, RAM, and the like, and functions as a control unit when the CPU reads and executes a program stored in advance in the ROM. The RAM is used as a working memory.

[0120] The non-volatile memory 304 is composed of, for example, a flash memory, and holds wireless setting information generated by the control unit 303.

[0121] The radio unit 306 is a wireless LAN standard that includes an antenna and an RF (radio) unit that transmits and receives radio signals via the antenna, and a radio signal that is transmitted and received by the radio circuit 312. And a wireless control unit 313 that performs processing for conforming wireless signals. Here, the wireless control unit 313 is composed of a microcomputer.

[0122] The video signal input circuit 307 is used when a video signal such as a composite video signal (eg, NTSC video signal) or a component video signal (eg, RGB signal) is input from the outside via a cable.

Projection unit 308 includes lamp drive circuit 320, light source 321, illumination optical system 322, transmissive liquid crystal panel 323 (hereinafter referred to as “LCD323”), imaging optical system 324, and image. A processing circuit 325, an LCD drive circuit 326, and a focus adjustment circuit 327 are provided. The light source 321 is composed of a lamp or the like, and is driven to light up and emits light based on a signal output from the lamp driving circuit 320 controlled by the control unit 303. The light emitted from the light source 321 is irradiated on the LCD 323 as illumination light by the illumination optical system 322.

Based on the control by the control unit U, the image processing circuit 325 performs processing such as addition or change of a signal on the video signal input to the video signal input circuit 303 or the image data received by the wireless unit 306. I do. The image signal processed and generated in this way is input to the LCD drive circuit 326.

The LCD 323 is driven by the LCD drive circuit 326 and displays an image on its display surface. The image thus displayed is emitted from the LCD 323 as light by the illumination light from the illumination optical system 322. Subsequently, the emitted light passes through the imaging optical system 324 and the projection opening of the housing, and is projected onto the screen (projection surface). In this way, the image force S displayed on the LCD 323 is projected onto the screen. The focus adjustment mechanism can adjust the focus of the image projected on the screen.

Here, the setting of wireless information in the image projection apparatus 3 will be specifically described with reference to the flowcharts of FIGS. FIG. 8 is a flowchart of wireless information setting processing in the image projection apparatus 3, FIG. 9 is a diagram illustrating an example of wireless setting information, FIG. 10 is a flowchart of effective time embedding processing in the image projection apparatus 3, and FIG. 5 is a flowchart of encryption key automatic update processing in FIG.

First, with reference to FIG. 8, an example of a basic operation for setting wireless information in the image projecting apparatus 3 will be described.

As shown in FIG. 8, the control unit 303 of the image projecting device 3 determines whether the power of the image projecting device 3 is turned on, whether the setting write button 315 is turned on (pressed), It is detected whether or not the wireless device 1 has been inserted (step S100). In this process, if any one of power ON, setting write button 315 ON and wireless device 1 insertion is detected (step S 100: YES), the control unit 303 proceeds to the process of step S 101. . On the other hand, when the power is turned on, the setting write button 315 is turned on, and the wireless device 1 is inserted! /, And no deviation is detected (step S100: NO), the process of step S100 is repeatedly executed.

[0130] In step S101, the control unit 303 operates the function of the wireless unit 306, and the wireless unit 30 The transmission / reception of the radio signal in step 6 is started (step S101), and the process proceeds to step SI02.

[0131] In step S102, the control unit 303 determines whether or not a USB device is inserted in the USB interface 314 (step S102). In this process, if it is determined that the USB device is inserted (step S102: YES), the control unit 303 acquires the identification information of the USB device (step S103). Here, the MAC address assigned to the USB device is taken as an example of identification information.

Next, the control unit 303 determines whether or not the identification information of the inserted USB device is the identification information held by the wireless device 1 (step S 104). Here, in the MAC address, which is identification information, the upper 24 bits are the vendor ID, and the lower 24 bits are the serial number assigned to each vendor. The control unit 303 determines whether the MAC address of the USB device is a predetermined vendor ID and a predetermined serial number, so that the MAC address of the USB device is the MAC address of the wireless device 1. It is determined whether or not there is.

[0133] In this process, if it is determined that the inserted USB device is the wireless device 1 (step S104: YES), the control unit 303 stops the function of the wireless unit 306, and the wireless unit 306 Wireless signal transmission / reception is stopped (step S105).

Thereafter, the control unit 303 acquires the current time information from the clock circuit 305 (step S106), and further reads the connectable time from the nonvolatile memory 304 (step S107). At this time, the control unit 303 calculates the valid time based on the connectable time and the current time. For example, if the connectable time is 2 hours and the current time is PM2: 30, the valid time is PM4: 30. The date is also included in the valid time.

Next, the control unit 303 generates a sign key used in the radio unit 306 and the like (step S10 8), and the process proceeds to step S109. As described above, the control unit 303 functions as a setting information generation unit that generates at least an encryption key of the wireless setting information before writing the wireless setting information in the flash memory 104 of the wireless device 1. Note that the encryption key is generated immediately before the wireless setting information is written to the wireless device 1. The power key can be generated each time the image projection apparatus is turned on. . Also set Each time the write button 315 is operated, the key number key may be generated.

In step S109, the control unit 303 reads the wireless setting information from the nonvolatile memory 304. The wireless setting information read out here includes the network mode, the network name (excluding the encryption key and the valid time), as shown in FIG. Note that the information read in this way, the key number generated in step S108, and the valid time generated in step S107 become wireless setting information for writing to the wireless device 1. However, regarding the IP address, an IP address different from that of the image projection apparatus 3 is set.

Next, the control unit 303 makes a write request to the wireless device 1 in order to start processing for writing wireless setting information to the wireless device 1. When this request is received by the wireless device 1, the CPU 101 of the wireless device 1 turns on the writing lamp 150 (step S110).

Thereafter, control unit 303 writes the wireless setting information to flash memory 104 of wireless device 1 (step S111). The control unit 303 waits until the writing is completed (step S112), and when this writing is completed (step S112: YES), the process proceeds to step S113. In step S 113, the control unit 303 turns off the writing lamp 150. On the other hand, if the writing has not been completed (step S112: NO), the process of step S112 is repeatedly executed.

In step S114, the control unit 303 determines whether the wireless device 1 has been disconnected from the USB interface 314 (step S114). In this process, if it is determined that the wireless device 1 has been removed (step S 114: YES), the control unit 303 resumes the function of the wireless unit 306 and enables the wireless unit 306 to transmit and receive wireless signals ( Step S115), the process proceeds to Step S116. On the other hand, if it is determined that the wireless device 1 has not been removed V (step S114: NO), the process of step SI14 is repeatedly executed.

[0140] If a USB device is inserted into the USB interface 314 in step S102 and V, na! / Is determined (step S102: NO), the process proceeds to step S116.

[0141] If it is determined in step S104 that the inserted USB device is not wireless device 1 (step S104: NO), control unit 303 causes the process to proceed to step S116. Note that even if the USB device is a device with a wireless part, its identification information is specified. If it is determined that the wireless device information is not valid, the wireless device 1 determines that the wireless device 1 is not! /, And the wireless setting information is not written.

In step S116, control unit 303 determines whether or not the power is off. If the control unit 303 determines that the power is off (step S116: YES), the control unit 303 terminates this process. If the control unit 303 determines that the power is not off (step S116: NO), the control unit 303 The process is repeated from step S100.

[0143] As described above, the control unit 303 of the image projection apparatus 3 in the present embodiment is a wireless device.

When 1 is connected to the USB connector 105, wireless setting information for performing wireless communication with the image projection device 3 is written into the wireless device 1. In addition, the operation of the wireless unit 306 is stopped for a predetermined period after the wireless device 1 is connected to the USB connector 105.

By the way, in the above-described embodiment, the effective time may be embedded in the force encryption key in which the encryption key and the effective time are written in the wireless device 1 as separate information.

In this case, as shown in FIG. 10, control unit 303 first generates a random variable (step S120). After that, the control unit 303 obtains information on the connectable time from the wireless setting information stored in the nonvolatile memory 304, and the connectable time thus obtained and the current time obtained from the clock circuit 305. The effective time is calculated based on the information (step S121).

Next, the control unit 303 determines whether the sign key mode of the wireless setting information stored in the nonvolatile memory 304 is 64-bit or 128-bit (step S122). In this process, if it is determined that the mode of the 喑 key is 128 bits (step S122: 128 bit), the control unit 303 sets the limit of the 喑 key to 13 characters or 26 hexadecimal digits (step S). one two Three). On the other hand, if it is determined that the mode of the 喑 sign key is 64 bits (step S122: 64bit), the control unit 303 sets the limit of the 喑 sign key to a hexadecimal number of 5 characters or 10 digits (step S124).

[0147] Thereafter, based on the random variable (random value) generated in step S120 and the valid time calculated in step S121, the control unit 303 generates an encryption key (step S125). . This key number is generated under the conditions limited by the process of step S123 or the process of step S124. For example, in the case of 128 bits, out of 13 characters, the first 7 characters are composed of random variables, and the last 6 characters are composed of the date and time. By configuring in this way, the image transfer application of the computer apparatus 4 can set the valid time using the encryption key. Further, the CPU 405 of the computer device 4 can detect the valid time based on the encryption key by executing the image transfer application.

[0148] By the way, if the encryption key generated by the image projection device 3 is continued to be the same encryption key, if the encryption key is known, then the computer device 4 and the image projection device 3 There is a risk that the wireless communication between them will be intercepted. In the above, the confidentiality of the wireless communication is improved by updating the encryption key every time the wireless setting information is written to the wireless device 1.

However, when switching the display image of the plurality of computer apparatuses 4 and projecting the display image from the image projecting apparatus 3, a plurality of wireless devices 1 for connecting to the plurality of computer apparatuses 4 are required. . However, if the encryption key is changed for each wireless device 1, there is a problem that only the wireless device 1 connected to the image projecting device 3 can communicate with the image projecting device 3 most recently. In addition, every time the wireless device 1 is connected, the encryption key must be changed, resulting in a heavy processing load.

[0150] Therefore, in the image projector 3 of the present embodiment, the sign key is updated when a predetermined condition is satisfied. An example of a method for updating the encryption key in this way will be described with reference to the drawings. FIG. 11 is a flowchart of the encryption key automatic update process.

As shown in FIG. 11, when the encryption key automatic update process is started, the control unit 303 first initializes the elapsed time (step S 130).

Thereafter, the control unit 303 detects whether or not the wireless device 1 is disconnected from the USB interface 314 (step S 131). In this process, if it is determined that the wireless device 1 is disconnected from the USB interface 314 (step S 131: YES), the control unit 303 starts counting up the elapsed time (step S 132), and performs the process in step S 132. Move to 133. On the other hand, if it is determined that the wireless device 1 has not pulled out the USB interface 314 (step S 131: NO), the control unit 303 determines that the wireless device 1 is connected to the USB interface 3. The process of step S131 is repeatedly performed until it is determined that 14 has been removed.

[0153] In step S133, after acquiring the elapsed time counted up, the control unit 303 is in a state in which the wireless unit 306 of the image projection device 3 performs wireless communication! It is determined whether or not there is (step S134).

[0154] In this process, if the wireless unit 306 determines that the state is that the wireless unit 306 has performed wireless communication!

(Step S134: NO), the control unit 303 determines whether or not the elapsed time exceeds the allowable connection time (Step S135). On the other hand, when determining that the wireless unit 306 is performing wireless communication (step S 134: YES), the control unit 303 resets the elapsed time (step S 13 7), and the process proceeds to step S 131. Transition.

[0155] If it is determined in step S135 that the elapsed time has exceeded the allowable connection time (step S 135: YES), the control unit 303 updates the number key (step S 136) and automatically updates the number key. Exit. On the other hand, when determining that the elapsed time does not exceed the allowable connection time (step S135: NO), the control unit 303 shifts the processing to step S131.

As described above, the control unit 303 of the image projection device 3 according to the present embodiment has a period in which communication with the computer device 4 is not performed via the wireless unit 306 for a predetermined period or longer (for example, 2 hours or longer). In such a case, at least the encryption key of the wireless setting information is generated and updated, thereby reducing the load of the encryption key generation process. In addition, a plurality of wireless devices 1 can be wirelessly set. Regarding the IP address, the control unit 303 needs to assign a different IP address to each wireless device 1.

[0157] Further, in addition to or instead of automatically updating the 喑 key, it may be performed manually. That is, the image projecting device 3 includes an update button 316 that instructs an operation to generate and update at least a signal key in the wireless setting information, and each time the update button 316 is operated, the wireless setting information is updated. Of these, at least an encryption key may be generated and updated. High security can be ensured by updating the encryption key when the image projector 3 is left on and the user or use gnole changes.

Yes

[0158] (Computer device 4)

Next, the computer apparatus 4 will be described with reference to the drawings. FIG. 12 shows this embodiment. FIG. 6 is a block diagram of a computer device 4 in FIG.

As shown in FIG. 12, the computer apparatus 4 includes a USB connector 401, a USB bus controller 402, an LCD 403 as a display unit, a graphics controller 404 that performs processing for displaying on the LDC 303, A CPU 405 that controls the computer apparatus 4 as a whole, a memory 406 that stores programs and various parameters, and a first bus 407 that connects them are provided.

[0160] Further, the computer device 4 includes a LAN interface 410, a mouse 411, a keyboard 412, a 0/0 ¥ 0 drive 413, and a floppy (registered trademark) compatible with 10BASE-T and 100BASE-TX. ) A disk drive 414, a node disk 415, and a second node 416 for connecting them are provided. A bus controller 408 that controls data exchange between the first bus 407 and the second bus 416 is provided.

[0161] The USB connector 401 and the USB bus controller 402 process data transmission / reception based on the USB standard with a USB device such as the wireless device 1 or an external keyboard board.

[0162] In addition, the memory 406 stores an operating system (OS) program and an application program for presentation. When the computer apparatus 4 is turned on, the CPU 405 first reads the OS program from the memory 406. By executing the functions, basic functions of the computer device such as functions related to input / output of the mouse 411 and the keyboard 412 and memory management such as the memory 406 and the hard disk 415 can be executed.

[0163] Then, in a state where the OS program is executed by the CPU 405, a computer program such as a presentation application program is read from the memory 406 and executed. As will be described later, when a device driver or an image transfer application program is installed, these are also executed by the CPU 405 to perform various controls.

An example of a basic operation for setting wireless information in the computer apparatus 4 configured as described above will be described. FIG. 13 is a flowchart showing the wireless information setting operation in the computer apparatus 4, which is performed by the CPU 405 that is a control unit of the computer apparatus 4. That is the wholesale.

[0165] As shown in FIG. 13, the CPU 405 of the computer apparatus 4 determines whether or not the wireless device 1 is connected (step S200). Whether or not the wireless device 1 is connected! / Is determined whether or not the USB device is connected to the USB connector 401, and this USB device is specified when the USB device is connected. Judgment is made based on whether or not it has the identification information.

[0166] If it is determined in this process that the wireless device 1 has been inserted (step S200: YES), the CPU 405 starts an auto-run operation process (step S201). This auto-run operation process is the process of S220 to S227 in FIG. 14, and will be described later. On the other hand, if it is determined that the wireless device 1 is not inserted (step S200: NO), the process of step S200 is repeated.

[0167] When the auto-run operation process ends, the CPU 405 determines whether or not the image transfer application is normally activated (step S202). In this process, if it is determined that the image transfer application has started up normally (step S202: YES), the process proceeds to step S203. In the following, the operations from step S203 to S216 are performed by functioning as an image transmission means by operating in accordance with the CPU405 image transfer application.

[0168] In step S203, the CPU 405 requests the lighting of the image transfer in progress lamp 151 of the wireless device 1 via the USB connector 401. Upon receiving this lighting request, the CPU 101 of the wireless device 1 lights the image transfer lamp 151.

[0169] Next, the CPU 405 starts transmitting image data to the image projection device 3 according to the screen (hereinafter referred to as "display screen") displayed on the LCD 403, which is the display unit of the computer device 4. (Step S204). In this process, the CPU 405 power display image data is transmitted to the wireless device 1 via the USB connector 401, and is transmitted from the wireless device 1 to the image projection device 3 by wireless communication. When the image projection device 3 receives the display image data, the image based on the display image data is projected onto the screen.

[0170] While transferring the display image data, the CPU 405 transfers the image of the wireless device 1. It is determined whether or not the feed stop switch 140 is turned on (step S205). When the CPU 101 of the wireless device 1 detects that the image transfer stop switch 140 has been operated to the image stop ON mode side (switch ON), the CPU 101 of the wireless device 1 notifies the computer device 4 via the USB connector 105 to that effect. Notify information. When the notification of this information is received, the CPU 405 determines that the image transfer stop switch 140 of the wireless device 1 is turned on.

[0171] If it is determined in step S205 that the image transfer stop switch 140 of the wireless device 1 has been operated to ON (step S205: YES), the CPU 405 turns off the image transfer in progress lamp 151 of the wireless device (step S209). ), The process proceeds to step S210. The wireless device image transfer lamp 151 is turned off when the CPU 405 issues a request to turn off the wireless device 1 image transfer lamp 151 via the USB connector 401 in the same manner as when the wireless device 1 is turned on. On the other hand, when the image transfer stop switch 140 of the wireless device 1 is operated to turn on the switch! /, It is determined that the switch is ON (step S205: NO), the CPU 405 proceeds to step S206.

In step S210, the CPU 405 transmits a black screen display instruction command, which is a specific image, to the image projecting apparatus 3 to the image projecting apparatus 3 via the wireless device 1, and the process proceeds to step S211.

[0173] Here, the power to send the black screen display instruction command to control the CPU 405. When the CPU 101 of the wireless device 1 is operated to turn on the image transfer stop switch 140, the black screen display instruction is sent. A command may be transmitted. In this case, in step S 211, the CPU 405 determines whether or not the image transfer stop switch 140 of the wireless device 1 has been operated to the image stop OFF mode side (OFF). Here, when the CPU 101 of the wireless device 1 detects that the image transfer stop switch 140 is operated to be turned off, the CPU 101 notifies the computer device 4 of the information via the USB connector 105. When the notification of this information is received, the CPU 405 determines that the image transfer stop switch 140 of the wireless device 1 has been operated to the switch OFF.

In this process, when it is determined that the image transfer stop switch 140 of the wireless device 1 has been operated to be turned off (step S211: YES), the CPU 405 moves the process to step S206. On the other hand, the image transfer stop switch 140 of wireless device 1 is turned off. If it is determined that the operation is not performed (step S211: NO), the process of step S211 is repeatedly executed.

[0175] In step S206, the CPU 405 requests time information (current time information) from the image projecting device 3, acquires time information transmitted from the image projecting device 3 in response to this request, and performs processing. Goes to step S207.

[0176] In step S207, the CPU 405 determines whether or not the valid time has elapsed. Whether or not the valid time has elapsed is determined based on the time information acquired from the image projection device 3 and the wireless setting information read from the wireless device 1. That is, whether or not the valid time has elapsed is determined by whether or not the current time acquired from the image projection device 3 is later than the valid time included in the wireless setting information read from the wireless device 1. You

[0177] In this process, if it is determined that the valid time has elapsed (step S207: YES), the CCU 405 displays a timeout message on the LCD 403 (step S212) and disconnects the wireless connection with the image projection device 3. (Step S213). The wireless connection with the image projection apparatus 3 is disconnected when the CPU 405 transmits a request for disconnecting the wireless connection with the image projection apparatus 3 to the wireless device 1, and the wireless device 1 responds to this request. Is called. When the disconnection of the wireless connection is completed, the CPU 405 ends the execution of the image transfer application (step S214).

[0178] Even if the valid time has not elapsed, if the CPU 405 determines that the predetermined time (for example, 5 minutes) has passed before the valid time, the valid time is extended before the valid time elapses. As shown, the LCD 403 displays that the effective time is approaching. Instead of or together with the display on the LCD 403, the CPU 405 transmits information indicating that the effective time is approaching to the image projecting device 3 via the wireless device 1, and is effective for the image projected from the image projecting device 3. You may try to superimpose information that time is coming!

[0179] If it is determined in step S207 that the valid time has not elapsed (step S207: NO), the CPU 405 determines whether or not the wireless device 1 is disconnected from the computer apparatus 4 (step S208). In this process, if it is determined that the wireless device 1 is disconnected from the computer apparatus 4 (step S208: YES), the CPU 405 displays an error message. Is displayed on the LCD 403 (step S215), and the execution of the image transfer application is terminated (step S216). On the other hand, if it is determined that the wireless device 1 has not been removed from the computer apparatus 4 (step S208: NO), the CPU 405 proceeds to step S205.

Yes

[0180] In step S202, when the image transfer application is not operating normally (step S202: NO), or when the processing of step S214 and the processing of step S216 are completed, the CPU 405 ends the main processing.

[0181] Next, the auto-run operation processing in step S201 will be described with reference to FIG. FIG. 14 is a flowchart of autorun processing in the computer apparatus. This auto-run operation recognizes the wireless device 1 as a CD-ROM by the function of the CD-ROM recognition unit 125 of the wireless device 1 when the wireless device 1 is connected and automatically detects the wireless device. It works by reading 1 information.

As shown in FIG. 14, the CPU 405 determines whether or not the device driver 131 is not installed in its own computer apparatus 4 (step S220). In this process, if it is determined that the device driver 131 is not installed (step S220: YES), the CPU 405 detects the device driver 131 for control of the wireless communication unit 107 stored in the flash memory 104 of the wireless device 1. Reading is performed through the USB connector 401, and the device driver 131 is installed in the local computer device 4 (step S221).

[0183] When the process of step S221 is completed, or when it is determined in step S220 that the device driver is installed! / (Step S220: NO), the CPU 405 starts the wireless setting application ( In step S222), the wireless setting information held in the wireless device 1 is read out via the USB connector 401 (step S223).

[0184] Next, the CPU 405 performs WLAN (wireless LAN) network setting (step S224). This network setting is performed for the wireless device 1. That is, the CPU 405 transmits wireless setting information to the wireless device 1 via the USB connector 401, and the wireless device 1 performs setting of the WLAN network according to the wireless setting information. WL AN network settings include the IP address, subnet mask, There are IP network settings such as DNS IP address and information necessary for wireless communication such as network name key.

[0185] When the processing of step S224 is completed, the CPU 405 determines whether or not wireless communication with the image projection apparatus 3 is connected via the wireless device 1, in other words, whether or not the image projection apparatus 3 is connected to the network. It is determined whether or not (step S225). In this process, when it is determined that the network connection with the image projection device 3 is established (step S225: YES), the CPU 405 activates and executes the image transfer application (step S226). On the other hand, if it is determined that the network connection with the image projection apparatus 3 is not established (step S225: NO), the CPU 405 performs an error message display process (step S227). This error message display process is performed by the CPU 405 displaying an error message on the LCD 403.

[0186] When the process of step S226 or the process of step S227 ends, the auto-run operation process ends.

Note that the CPU 405 of the computer apparatus 4 performs power control of the wireless device 1. That is, the wireless device 1 has the memory controller function unit 121 and the wireless communication function unit 123 as described above, and these power supplies can be separately controlled ON and OFF. As described above, since the memory controller function unit 121 and the wireless communication function unit 123 can be individually turned on and off, a highly reliable wireless connection operation can be executed within a limited power range as a USB device. it can. For example, in steps S220 and S223, the power to the memory controller function unit 121 is turned on, and the power to the wireless communication function unit 123 is turned off. In steps S224 and S227, the power to the memory controller function unit 121 is turned off and the power to the wireless communication function unit 123 is turned on. In addition, when copying the image transfer application stored in the storage unit of the wireless device 1 to the hard disk 415 of the computer device 4, the power to the memory controller function unit 121 is turned on, and the connection to the wireless communication function unit 123 is performed. Turn off the power

As described above, in the image projection system S of the present embodiment, the wireless device 1 has the wireless unit 306 and projects an image according to the image data received by the wireless unit 306. The device 3 functions as a wireless unit of the computer device 4 that transmits image data by wireless communication. The wireless device 1 includes a USB connector 105 that can be connected to both the image projection device 3 and the computer device 4, and wireless setting information (when the USB connector 105 is connected to the image projection device 3) from the image projection device 3 ( Wireless communication setting information), and when the USB connector 105 is connected to the computer device 4, the wireless setting information written from the image projection device 3 can be read by the computer device 4 and the flash memory 104 A wireless communication unit 107 that communicates with the wireless unit 306 of the image projection device 3 according to the setting based on the wireless setting information written from the image projection device 3 when the USB connector 105 is connected to the computer device 4 Therefore, communication between the image projection device 3 and the computer device 4 is performed based on the wireless setting information set by the image projection device 3. Can, it is possible to provide a highly sensitive wireless device 1 or the image projection system S.

[0189] For example, the power described between the wireless device 1, the image projection device 3, and the computer device 4 by communication based on the USB standard is not limited to this, and communication may be performed by other communication standards.

[0190] (Another embodiment of image projection system S '[1])

Next, another embodiment [1] of the present invention will be described with reference to the drawings. FIG. 15 is an overall configuration diagram of an image projection system S ′ in another embodiment [1], FIG. 16 is a diagram for explaining the schematic operation in the image projection system S ′ in another embodiment [1], and FIG. FIG. 7 is an external view of a remote control device according to another embodiment [1]. The wireless device 1 ′ in the other embodiment [1] has the same configuration as that of the wireless device 1 in the above-described embodiment except that the control program stored in the ROM 103 is partially different. The same reference numerals as those in the wireless device 1 shown in FIG.

[0191] As shown in FIG. 15, the image projection system S ′ in another embodiment [1] can be connected to the wireless device 1 ′ (corresponding to an example of the device) and the wireless device 1 ′. The remote operation device 2 that remotely controls the operation of the image projection device 3 ′, which will be described later, the image projection device 3 ′ that projects an image according to image data input from the outside onto the screen, and the image projection device 3 Personal computer 4 that transmits image data (hereinafter referred to as `` computer device 4 '') The ) And. The wireless device 1 ′ is a USB dongle that has a function as a wireless unit of the computer apparatus 4 and a function as a memory. The computer device 4 causes the wireless device 1 ′ to function as a wireless unit by connecting the USB connector 105 (see FIG. 3) in the wireless device 1 ′, and an image is projected to the image projection device 3 ′ via the wireless device 1 ′. Send data. The image projection device 3 ′ receives image data transmitted by wireless communication from the computer device 4 via the wireless device 1 ′, and projects an image corresponding to the image data on the screen.

[0192] Here, the wireless communication between the wireless device 1 'and the image projection device 3' is performed so that wireless LAN (Local Area Network) standards such as IEEE802.11a / b / g can be satisfied. Each of the line device 1 ′ and the image projection device 3 ′ has a wireless unit compliant with the wireless LAN standard.

[0193] In a wireless LAN, the settings for performing wireless communication must be made in advance as described above. The wireless communication setting information (hereinafter referred to as “wireless setting information”) that must be set is SSID (Extended Service Set Identifier), which is the network name, and WEP (Wired Equipment), which is the key. Privacy) key, etc., cannot be set without some knowledge, and the work is complicated.

[0194] Therefore, in the image projection system S 'in the other embodiment [1], the wireless device

1 'is provided with a wireless setting information storage unit for storing wireless setting information, thereby automatically setting the wireless setting information. In addition, the encryption key and the like are changed at a predetermined timing to improve confidentiality.

Here, a procedure for setting wireless communication in the image projection system S 1 will be briefly described. FIG. 16 is a diagram for explaining a wireless communication setting procedure in another embodiment [1].

[0196] As shown in Fig. 16 (a), the USB connector 105 of the wireless device 1 'is connected to the USB connector 201 of the remote control device 2. When the remote control device 2 detects that the wireless device 1 ′ is connected via the USB connector 201, the remote control device 2 stores information on wireless setting information necessary for communication with the wireless unit of the image projection device 3 ′ in the wireless device 1. Using the writing means, the data is written into the wireless setting information storage unit of the wireless device 1 ′ via the USB connector 201. At this time, the wireless device 1 'writing lamp 150 (see Fig. 3) flashes and the wireless setting information is written to the user. Informed that it is busy. Further, the wireless setting information to be written to the wireless device 1 ′ is generated in the remote operation device 2 using the information generating means.

[0197] The timing when the remote control device 2 writes the wireless setting information to the wireless device 1 'is not only when the USB connector 105 of the wireless device 1' is connected to the USB connector 201 of the remote control device 2, but also when the remote control device 2 This may be the case when an activation control button 231 (see FIG. 17) described later is operated. The start control button 231 is a button for instructing start and stop of the image projection device 3 ′, and the remote control device 2 is connected to the image projection device 3 ′ every time the start control button 231 is operated. Repeat the start and stop instructions alternately. However, the remote control device 2 may be provided with a start control button for giving a start instruction and a stop control button for giving a stop instruction.

[0198] When the wireless device 1 'is not a specific device, the wireless setting information is not written. This is because the image projection system S 'is unstable due to an unauthorized product (such as a copy product) of a bad wireless device 1' when writing to whatever device is connected. In order to avoid this, only a dedicated device can be used as a wireless device. Whether or not the connected device power is a dedicated wireless device 1 ′ is determined by the image projecting device 3 ′ by reading the identification information given to the device from the device, for example, a part of the identification information indicating the manufacturer. Can be determined by detecting that is specific information.

[0199] When the writing of the wireless setting information to the wireless device 1 'is completed, the flashing lamp 150 will stop flashing, so as shown in Fig. 16 (b), connect the USB connector 1 05 of the wireless device 1' to the wireless device 1 '. It is removed from the remote control device 2 and connected to the USB connector 401 of the computer device 4 this time.

[0200] When the USB connector 105 of the wireless device 1 is connected to the USB connector 401 of the computer device 4, the computer device 4 is connected to the device driver program (hereinafter referred to as "device device" stored in the program storage unit of the wireless device 1 '). Install a wireless setting application program (hereinafter abbreviated as “wireless setting application”) and an image transfer application program (hereinafter abbreviated as “image transfer application”). The control unit of the computer device 4 executes the wireless setting application to execute the wireless device. Requests the output of the wireless setting information written by the remote control device 2 to the station 1 ′. The control unit of the wireless device 1 ′ extracts the wireless setting information from the wireless setting information storage unit of the wireless device 1 ′, and outputs this wireless setting information to the computer apparatus 4 via the USB connector 105. The computer apparatus 4 acquires the wireless setting information output from the wireless device 1 ′, and sets this wireless setting information in the wireless communication unit of the wireless device 1 ′ using a device driver. The wireless device 1 ′ communicates with the wireless unit of the image projection device 3 ′ based on the wireless setting information set by the wireless communication unit in this way, in other words, based on the wireless setting information written by the remote control device 2. It becomes possible. Further, the control unit of the computer device 4 functions as an image transmission unit that transmits image data to the image projection device 3 ′ via the wireless communication unit by executing the image transfer application.

On the other hand, the remote operation device 2 notifies the image projection device 3 ′ of the wireless setting information written in the wireless device 1 ′ by infrared communication. The image projecting device 3 ′ receives the wireless setting information notified from the remote control device 2 by the infrared light receiving unit 310 and sets the wireless setting information of the own device. As described above, since the communication between the remote control device 2 and the image projection device 3 ′ is performed by infrared rays, wiretapping from a third party can be prevented. Here, infrared communication is used for communication between the remote control device 2 and the image projection device 3 ′, but radio communication using radio signals may be used as long as wireless communication uses wireless signals. That is, the remote operation device 2 has a wireless transmission unit that transmits a wireless signal, and the image projection device 3 ′ has a wireless reception unit that receives a wireless signal from the remote operation device 2. In another embodiment [1], infrared communication will be described as an example of wireless communication.

[0202] The timing for notifying the wireless setting information from the remote control device 2 to the image projection device 3 'is not only when the information transmission button 237 (see Fig. 17) described later is operated, but also the USB of the wireless device 1'. For example, when the connector 105 is removed from the USB connector 201 of the remote operation device 2, the activation control button 231 provided on the remote operation device 2 is operated.

[0203] Thus, the remote control device 2 writes the wireless setting information to the computer device 4 through the wireless device 1 'and also notifies the image projection device 3' by wireless communication such as infrared communication. The user can easily image projection device 3 'and wireless device 1' The wireless setting information can be matched, and wireless communication can be performed between the computer apparatus 4 connected to the wireless device 1 ′ and the image projection apparatus 3 ′ while improving confidentiality.

[0204] After that, as shown in FIG. 16 (c), image data is transmitted from the computer apparatus 4 to the image projection apparatus 3 'via the wireless device 1' by executing the image transfer application of the computer apparatus 4. Projector 3 'projects an image based on the image data onto the screen.

[0205] Further, the wireless setting information set in the wireless device 1 'by the remote control device 2 includes an effective time during which the wireless unit (wireless communication unit 107 described later) of the wireless device 1' functions. The image transfer application of the computer apparatus 4 limits the time during which wireless communication by the wireless unit of the wireless device 1 ′ can be performed by reading this effective time. That is, when the image transfer application determines that this valid time has elapsed, the image transfer application stops the function of the wireless communication unit.

[0206] The image transfer application of the computer device 4 has a function of receiving time information transmitted from the image projection device 3 ', and based on this time information and the valid time read from the wireless device 1'. It is determined whether or not the effective time has elapsed. If it is determined that the valid time has passed, the function of the wireless communication unit of the wireless device 1 ′ is stopped.

[0207] In addition, when the image projection device 3 'receives the wireless setting information by the infrared signal from the remote control device 2, the image projection device 3' sets the wireless unit of its own device to the operating state, and then the computer device 4 via the wireless unit. It is determined whether or not wireless communication is being performed, and when it is determined that wireless communication with the computer apparatus 4 is not being performed, the wireless unit of its own device is set to a non-operating state. Note that the image projecting device 3 ′ is in wireless communication with the computer device 4 that the computer device 4 and the image projecting device 3 ′ are not only in the state of transmitting image data from the computer device 4 to the image projecting device 3 ′. Including a state in which a wireless link is established.

[0208] By the way, if the wireless setting information written in the wireless device 1 'by the remote control device 2 is always constant, it is not preferable for security. Further, unintended image data may be transmitted to the image projection device 3 ′ from the computer device 4 that has forgotten to remove the wireless device 1 ′. Therefore, the remote control device 2 updates at least the encryption key in the wireless setting information.

That is, the remote control device 2 is configured to be able to update the wireless setting information. Therefore, the confidentiality of the wireless communication between the computer apparatus 4 to which the wireless device 1 ′ is connected and the image projection apparatus 3 ′ can be improved. The timing when the remote control device 2 updates the wireless setting information is when the wireless device 1 ′ is connected to the remote control device 2 or when the start control button 231 provided on the remote control device 2 is operated. It can be.

[0210] By the way, when transmitting image data from a plurality of computer devices 4 to the image projection device 3 ', it is necessary to write wireless setting information to the plurality of wireless devices 1'. The wireless device 1 'is a remote control device. If the wireless setting information is updated when connected to 2, different wireless setting information is written to the plurality of wireless devices 1 ′.

[0211] Therefore, the remote control device 2 can set the number of times that the same wireless setting information can be written to the device. As a method of setting the number of times in this manner, in the remote operation device 2, the number of times of writing is set by the method of setting the number of times of writing by the number of continuous operations of the update button 232, the number of times of writing by using the cross key 233, etc. There is a method of setting.

[0212] (Description of configuration and operation of each device)

The configuration and operation of the image projection system S ′ configured as described above will be described in more detail. Hereinafter, specific configurations and operations of the wireless device 1 ′, the remote operation device 2, the image projection device 3 ′, and the computer device 4 according to the embodiment of the present invention will be described.

[0213] (About Wireless Device 1 ')

First, the configuration and operation of the wireless device 1 ′ will be described. Since the block diagram of the wireless device 1 in FIG. 4, the functional block diagram of the wireless device 1 in FIG. 5, and the block diagram of the memory controller functional unit in FIG. Only the explanation is omitted, and some explanations are omitted for the overlapping parts.

[0214] As with wireless device 1, wireless device 1, CPU (Central Processing Unit) 101, RAM (Random Access Memory) 102, ROM (Read Only Memory) 103, flash memory 104, USB connector 105, USB connection It consists of a circuit 106, a wireless communication unit 107, an operation unit 108, a notification unit 109, etc., and is designed to be portable and compact (see Fig. 4). [0215] The CPU 101 functions as a control unit of the wireless device 1 'by reading and executing the control program stored in the ROM 103. The ROM 103 stores identification information (for example, a MAC address), and the identification information can be transmitted to the remote control device 2 or the computer device 4 via the USB connector 105 under the control of the CPU 101. it can.

[0216] The wireless setting information includes information similar to that shown in Fig. 9, and will not be described here in detail.

The USB connector 105 is a general-purpose USB connector, and can be connected to the USB connectors 201 and 401 of the remote control device 2 and the computer device 4. When the USB connector 105 is connected to the USB connector 201 of the remote control device 2 or the USB connector 401 of the computer device 4, the CPU 101 transmits / receives data to / from these devices via the USB connection circuit 106. The USB connection circuit 106 is an interface circuit for transmitting and receiving data according to the USB standard.

[0218] When the USB connector 105 is connected to the remote operation device 2, the CPU 101 controls the wireless memory 104 so that the wireless setting information can be written from the remote operation device 2. Further, when the USB connector 105 is connected to the computer apparatus 4, the CPU 101 is controlled so that the wireless setting information written in the flash memory 104 can be read by the computer apparatus 4.

[0219] When the USB connector 105 is connected to the computer device 4, the wireless communication unit 107 communicates with the wireless unit of the image projection device 3 'according to the setting based on the wireless setting information written from the remote control device 2. . Here, the wireless setting information written from the remote control device 2 is first read into the computer device 4, and the wireless setting information read in this way is transmitted from the computer device 4 to the wireless device 1 ′ to perform wireless communication. A method for causing the unit 107 to perform wireless communication according to the wireless setting information, or a method for the CPU 101 to read the wireless setting information from the remote control device 2 and perform the wireless communication according to the wireless setting information by the wireless communication unit 107. Here, the former method will be described as an example. In the former method, the CPU 101 functions as an output means for outputting the wireless setting information written by the remote operation device 2 to the computer device 4. [0220] (Remote control device 2)

Next, the configuration and operation of the remote control device 2 will be described. FIG. 18 is a block diagram of the remote control device 2.

As shown in FIG. 18, the remote control device 2 includes a USB connector 201, a USB host controller 202 that communicates with other devices via the USB connector 201, and an image projection device 3. Infrared transmitter 203 for transmitting an infrared signal to (corresponding to an example of a wireless transmitter), an infrared controller 204 for controlling the infrared transmitter 203, an operation button 205 operated by the user, and this operation An input interface 206 that notifies the CPU described later that the button 205 has been operated by the user, a display unit 206 that displays various types of information, a memory 208 that is used as a working memory, and a clock that measures the current time, etc. A clock circuit 209 as a means, a CPU 210 that controls the entire remote operation device 2, a function as a program storage unit that stores a control program for the remote operation device 2, and a wireless communication unit 107 A secondary storage device 211 having a function as a wireless setting information storage unit for storing wireless setting information necessary for communication with the image projection device 3 ′, a USB host controller 202, and an infrared control unit 204. The input interface 206, the display unit 207, the memory 208, the clock circuit 209, the CPU 210, and the secondary storage device 211 are connected by a bus 216.

[0222] The CPU 210 functions as a control unit of the remote operation device 2 by reading and executing the control program stored in the secondary storage device 211. Here, for convenience of explanation, the secondary storage device 211 can be constituted by the force S described as a single storage means and a plurality of memories (ROM, RAM, etc.).

[0223] Here, the CPU 210, as a control unit of the remote control device 2, generates wireless setting information necessary for wireless communication between the wireless device 1 'connected to the computer device 4 and the image projection device 3'. Functions as a wireless setting information generation unit that writes wireless setting information to the wireless device 1 ′ at a predetermined timing. Here, the timing for generating (including updating) and writing the wireless setting information is as follows: (a) When the CPU 210 detects that the USB connector 105 of the wireless device 1 ′ is connected to the USB connector 201, (b) When the CPU 210 detects that the activation control button 231 provided on the remote control device 2 is operated, or (c) the CPU 210 operates the update button 232 provided on the remote control device 2. It is determined by the setting in the secondary storage device 211 by the user's operation of the left and right arrow keys 234, 235, the determination key 236, and the like. It can also be set to operate at both timings (b) and (c). In addition, instead of the timing (a) above, the timing for generating the wireless setting information is detected by the CPU 210 from the USB connector 201 to the USB connector 105 force S of the wireless device 1 '. It's nice to have done it.

[0224] Further, the CPU 210 functions as a control unit of the remote operation device 2 as a notification unit that notifies the image projection device 3 'of the wireless setting information written in the wireless device 1'. The timing for notifying the wireless setting information is (a) when the CPU 210 updates the wireless setting information, (b) the CPU 210 detects that the information transmission button 237 provided on the remote control device 2 has been operated. There are times, and which one to select is determined by the setting in the secondary storage device 211 by the operation of the left and right arrow keys 234, 235, the determination key 236, etc. by the user. The CPU 210 notifies the current time information when notifying the wireless setting information. The control unit 303 of the image projection device 3 ′ adjusts the clock circuit 305 based on the current time information notified from the remote control device 2 (see FIG. 23).

[0225] In addition, the CPU 210 functions as a control unit of the remote control device 2 and functions as a write count setting unit together with the operation button 205 in order to set the number of times that the same radio setting information can be written to the radio device 1 '. To do. In other words, the wireless setting information is not updated until the wireless setting information writing unit exceeds the set number of writings, and the wireless setting information is not updated. Control to update information. For example, when the USB connector 105 of the wireless device 1 ′ is connected to the USB connector 201 of the remote control device 2 while the update button of the remote control device 2 is being operated, the CPU 210 performs the number of writes to the wireless device 1 ′. Increase by one (see Figure 19). In addition, when the wireless setting information is updated for the set number of times of writing, the CPU 210 displays a warning on the display unit 207 and a warning from a warning sound output unit (not shown), and then within a predetermined time. In addition, it has a function as an update determination means for updating the wireless setting information when a maintenance button 238 described later is not operated.

[0226] Here, as described above, the wireless setting information includes the wireless LAN standard type, the network mode. Network name, wireless channel, authentication level, encryption level, data encryption method, key number, IP address, subnet mask, DNS address, valid time, etc.

Yes

[0227] The USB connector 201 of the wireless device 1 'can be connected to the USB connector 201. The CPU 210 detects whether or not the USB connector 105 of the wireless device 1 ′ is connected to the USB connector 201! /, Via the USB host controller 202. Send / receive data to / from device 1 '.

[0228] As shown in Fig. 17, the operation button 205 is provided at a position where the user can operate the image projection apparatus 3 ', that is, at an appropriate position on the outer wall surface of the housing. By operating 205, the CPU 210 executes control according to the operation content. The operation button 205 includes the above-described start control button 231 (corresponding to an example of the start control instruction unit), update button 232 (corresponding to an example of the update operation unit), cross key 233, left arrow key 234, right arrow key 235, determination key 236, information transmission button 237 for transmitting wireless setting information to the image projection apparatus 3 ′, maintenance button 238 as an update suppression unit for suppressing wireless setting information update, to wireless device 1 ′ A wireless information setting button 239 for writing wireless setting information is arranged.

[0229] Here, the processing operation of the wireless setting information in the remote control device 2 will be specifically described with reference to the flowcharts of Figs. 19 is a flowchart of the wireless setting information process in the remote operation device 2, FIG. 20 is a flowchart of the wireless setting information update process in the remote operation device 2, and FIG. 21 is a wireless setting information writing process in the remote operation device 2. It is a flowchart.

First, an example of the basic operation of the wireless information setting process in the remote control device 2 will be described with reference to FIG. This operation is set in the remote control device 2 to update the wireless setting information and write the wireless setting information when the USB connector 105 of the wireless device 1 ′ is connected to the USB connector 201. Further, it is an operation example when it is set to notify the wireless setting information to the image projection device 3 ′ when the information transmission button 237 is operated.

[0231] As shown in FIG. 19, the CPU 210 of the remote control device 2 is connected to the USB device. Whether or not is detected (step S100 '). That is, the CPU 210 detects whether or not the USB connector of the USB device is inserted into the USB connector 201. In this process, when the connection of the USB device is detected (step S100, YES), the CPU 210 proceeds to the process of step S10 1 ′. On the other hand, if the connection of the USB device is not detected (step S100 ′: NO), the process of step S100 ′ is repeatedly executed.

[0232] In step S101 ', the CPU 210 acquires the identification information of the USB device. In other words, the CPU 210 makes a request for transmitting identification information to the USB device via the USB connector 201, and acquires the identification information transmitted from the USB device in response to this request. Here, the MAC address assigned to the USB device is explained as an example of identification information.

Next, the CPU 210 determines whether or not the identification information of the inserted USB device is the identification information held by the wireless device 1 ′ (step S 102 ′). Here, in the MAC address, which is identification information, the upper 24 bits are the vendor ID, and the lower 24 bits are the serial number assigned to each vendor. The CPU 210 determines whether the MAC address of the USB device is the MAC address of the wireless device 1 by determining whether the MAC address of the USB device is a predetermined vendor ID and a predetermined serial number. Determine whether or not.

[0234] In this process, if it is determined that the inserted USB device is wireless device 1 '

(Step S102 ′: YES), the CPU 210 shifts the processing to Step S103 ′. On the other hand, when determining that the inserted USB device is not the wireless device 1 ′ (step S102 ′: NO), the CPU 210 shifts the processing to step S100 ′.

[0235] In step S103 ', the CPU 210 detects whether or not the maintenance button 238 is operated within a predetermined time after the wireless device 1' is connected. If it is determined that the maintenance button 238 is not operated (step S103 ′: NO), the CPU 210 determines that the secondary storage device 21

The wireless setting information stored in 1 is updated (step S104 ′). This process is shown in the flowchart of FIG. 20, and will be described later.

[0236] When the process of step S104 'is completed, or when it is determined in step S103' that the maintenance button 238 has been operated (step S103 ': YES), the CPU 210 receives the wireless setting information. Is written to the wireless device 1 ′ (step S105 ′). This process is shown in the flowchart of FIG. 21, and will be described later.

Next, the CPU 210 detects whether or not the information transmission button 237 has been operated (step S 106 ′). The CPU 210 repeats this process until the information transmission button 237 is operated (step S 106 ′: NO), and when the information transmission button 237 is operated (step S 106 ′: YES), the infrared transmission unit 203 wirelessly transmits the information. Wireless setting information is transmitted to device 1 'by infrared rays (step S107').

[0238] When the processing of step S107 'is completed, CPU 210 determines whether or not the power supply of remote control device 2 is off (step S108'). If the CPU 210 determines that the power of the remote control device 2 is off (step S108 ': YES), the CPU 210 ends the process, while if it determines that the power is not off (step S108). ': NO), the process is repeated from step S100'.

As described above, the CPU 210 functions as a notification unit that notifies the image projection device 3 ′ of the wireless setting information written in the wireless device 1 ′.

[0240] Next, details of the update processing of the wireless setting information in step S104 'will be specifically described with reference to the flowchart of FIG.

[0241] When the update processing of the wireless setting information is started, the CPU 210 first clears the key of the wireless setting information stored in the secondary storage device 211 (step S110 '), and then the wireless setting A key number is generated from the information (step S 111 ′), and the process proceeds to step S 112 ′.

[0242] In step S112 ', CPU 210 reads the wireless setting information from secondary storage device 211. The wireless setting information read out here includes the network mode and network name (excluding the encryption key and valid time) as shown in FIG. The CPU 210 updates the wireless setting information by generating new wireless setting information obtained by adding the encryption key generated in step S111 to the information thus read and storing it in the secondary storage device 211. (Step S113 '). Here, the wireless setting information is updated by updating the encryption key. However, other encryption information (encryption level, data encryption) may be updated in addition to the encryption key. In addition to these, band information (ΙΕΕΕ802 · l la / b / g) and You can update your wireless channel.

In this way, the CPU 210 functions as a wireless setting information generation unit that generates wireless setting information necessary for wireless communication between the image projection device 3 ′ and the computer device 4.

Next, details of the wireless setting information writing process in step S 105 ′ will be specifically described with reference to the flowchart of FIG.

[0245] When the setting process of the wireless setting information is started, the CPU 210 first makes a write request to the wireless device 1 'in order to start the writing process of the wireless setting information to the wireless device 1'. When this request is received by the wireless device 1 ′, the CPU 210 of the wireless device 1 ′ turns on the writing lamp 150 (step S120 ′). Thereafter, the CPU 210 reads the wireless setting information from the secondary storage device 211. The wireless setting information read here includes the network mode, network name (excluding the valid time), etc., as shown in FIG. After that, the CPU 210 acquires information on the current time from the clock circuit 209 and further reads out the connectable time from the secondary storage device 211. At this time, the CPU 210 calculates the valid time based on the connectable time and the current time. For example, if the connectable time is 2 hours and the current time is PM2: 30, the valid time is PM4: 30. The date is also included in the valid time. Next, the CPU starts processing to write the wireless setting information read from the secondary storage device 211 and the generated valid time to the wireless device 1 ′ as wireless setting information (step S121).

[0246] After that, the CPU 210 waits until the writing is completed (step S122 ': NO). When the writing is completed (step S122': YES), the wireless device 1 'requests the wireless device 1' to turn off the writing lamp 150. To do. When this request is received by the wireless device 1 ′, the CPU 101 of the wireless device 1 turns off the writing lamp 150 (step S123).

[0247] Incidentally, in the above-described embodiment, the effective time may be embedded in the force encryption key in which the encryption key and the effective time are written in the wireless device 1 'as separate information. In this case, the CPU 210 generates a random variable, obtains information on the connectable time from the wireless setting information stored in the secondary storage device 211, and the connectable time thus obtained and the clock circuit 209. The effective time is calculated based on the current time information obtained from (1). Then, the CPU 210 uses the random number and the valid time to Produces one. For example, if this key is 128bit, out of 13 characters, the first 7 characters are composed of random variables, and the last 6 characters are composed of the date and time of the valid time. By configuring in this way, the image transfer application of the computer apparatus 4 can set the valid time using the encryption key. Further, the CPU 405 of the computer device 4 can detect the valid time based on the encryption key by executing the image transfer application.

Yes

[0248] As described above, the CPU 210 of the remote control device 2 in the other embodiment [1] performs wireless communication with the image projection device 3 'when the wireless device 1' is connected to the USB connector 201. The wireless setting information is written to this wireless device 1 '. Also, the confidentiality of wireless communication is improved by updating the encryption key each time wireless setting information is written to the wireless device 1 ′. However, the same wireless setting information can be written to a plurality of wireless devices 1 ′ by operating the maintenance button so that the wireless setting information is not updated, thereby enabling a plurality of computer devices to be written. Wireless communication is possible between 4 and the image projection device 3 ′.

[0249] Note that, as a method of writing the same wireless setting information to a plurality of wireless devices 1 ', as a writing frequency setting unit for setting the number of times that the same wireless setting information can be written to the wireless device 1'. Do not update the wireless setting information until the CPU 210 functions and the wireless setting information is written beyond this number of writes! For example, the number of times of writing may be set by the left and right arrow keys 234, 235 and the enter key 236. In addition, after connecting the wireless device 1 ′ to the remote control device 2, the number of times that the update button 232 is operated in a predetermined time may be set as the number of times of writing. The number of times of writing set in this way is stored in the secondary storage device 211. At this time, the CPU 210 may display the setting information of the number of times of writing on the display unit 207 and the information of the number of the wireless devices 1 ′ in which the wireless setting information is actually written.

[0250] Further, in the other embodiment [1], the remote control device 2 writes the wireless setting information to the wireless device 1 'when the wireless device 1' is connected. The wireless setting information may be updated when the button 231 is operated. Hereinafter, referring to FIG. 22, it is assumed that the start control button 231 is operated in the remote control device 2. An example of an operation for updating the wireless setting information will be described. FIG. 22 is a flowchart of the wireless setting information update process in the remote operation device 2.

As shown in FIG. 22, first, the CPU 210 of the remote control device 2 detects whether or not the activation control button 231 has been operated (step S 130 ′). When the activation control button 23 1 is operated by the user, the CPU 210 detects this operation (step S130 ′: YES), and transmits a shutdown command that is a stop instruction to the image projector 3 ′ (step S131 ′). ). When the image projection device 3 ′ receives a shutdown command from the remote control device 2, the image projection device 3 ′ turns off a light source 321, an LCD 323, and the like to be described later in the projection unit 308, and puts the CPU 210 into a sleep state.

[0252] Next, the CPU 210 performs update processing of the wireless setting information stored in the secondary storage device 211.

(Step S132 '), the process proceeds to Step S133'. Note that the process of step S 132 ′ is the same as the process of step S 104 ′ described above, and a description thereof will be omitted.

[0253] In step S133 ', the CPU 210 detects whether or not a USB device is connected in the same manner as in the process of step S100'. In this process, when the connection of the USB device is detected (step S133 ′: YES), the CPU 210 proceeds to the process of step S134 ′.

[0254] In step S134 ', the CPU 210 acquires USB device identification information in the same manner as in step S101. Thereafter, the CPU 210 determines whether or not the USB device identification information is the identification information held by the wireless device 1 ′ (step S 135 ′). ).

[0255] In this process, if the inserted USB device is determined to be wireless device 1 '

(Step S135 ′: YES), the CPU 210 performs a process of writing the wireless setting information to the wireless device 1 ′ (Step S136 ′). Since this process is the same as the process in step S105 ′ described above, description thereof is omitted.

[0256] Thereafter, the CPU 210 detects whether or not the activation control button 231 has been operated (step S137 '). When the activation control button 231 is operated by the user, the CPU 210 detects this operation (step S137 ′: YES), and transmits an activation command as an activation instruction to the image projection device 3 ′ (step S138 ′). Further, the wireless setting information is transmitted from the infrared transmission unit 203 to the wireless device 1 ′ by infrared rays (step S 139 ′). [0257] In the above description, the wireless setting information is updated when the image projection device 3 'is shut down. However, the wireless setting information is updated when the image projection device 3' is activated. Also good. In this case, for example, when the activation control button 231 is operated and the image projection apparatus 3 ′ is activated, the CPU 210 determines whether or not the wireless device 1 ′ is connected, and the wireless device 1 ′ is connected. If the wireless setting information is updated, an activation command is transmitted to the image projection apparatus 3 ′, and the wireless setting information is transmitted to the wireless device 1 ′ by infrared rays.

As described above, since the remote control device 2 updates the wireless setting information when the start control button is operated, the wireless setting information is displayed for each start instruction or stop instruction of the image projection device 3 ′. The wireless setting information can be updated every time the image projection device 3 ′ is used. In step S137 ′, the CPU 210 detects whether or not a wireless device 1 other than the wireless device 1 ′ into which the wireless setting information has been written is connected, and another wireless device 1 ′ is connected. When it is determined that the wireless setting information has been determined, the process proceeds to step S 136 ′, and the wireless setting information may be written to the other wireless device. In this way, the same wireless setting information can be written to a plurality of wireless devices 1 ′. Here, the same wireless setting information means that the information excluding the IP address in the wireless setting information shown in FIG. 9 is the same.

[0259] In the above description, the wireless setting information is updated by the remote operation device 2 when the wireless device 1 'is connected to the remote operation device 2 or when the activation control button 231 is operated. You may make it carry out by manual operation. That is, the remote control device 2 is provided with an update button 232 for instructing at least an operation for generating and updating an encryption key in the wireless setting information, and each time the update button 232 is operated, the wireless setting information is updated. At least you should generate and update the encryption key.

[0260] (Image projection device 3 ')

As shown in FIG. 23, the image projection device 3 ′ includes an infrared ray receiving unit 301 (corresponding to an example of a wireless receiving unit) that performs infrared communication with the remote control device 2, and a control for performing various operations by the user. A panel 302, a control unit 303 for controlling the entire image projection apparatus 3 ′, a non-volatile memory 304 for holding information such as wireless setting information, and a clock circuit 3 which is a time measuring means 05, a wireless unit 306 that performs wireless communication compliant with the wireless LAN standard, a video signal input circuit 307 that inputs a video signal from the outside, and a video signal or wireless unit 306 that is input via the video signal input circuit 307 A projection unit 308 that projects an image based on the image data received via the image data, and these are built in the housing. Hereinafter, the image projecting device 3 ′ has the same configuration as the configuration of the image projecting device 3 described above except that the processing by the control unit 303 and the configuration of the infrared receiving unit 301 are partially different. The detailed explanation is omitted.

[0261] Infrared receiver 301 includes an infrared receiver 310 that receives an infrared signal transmitted from remote operation device 2, and an infrared controller that notifies controller 303 of the infrared signal received by infrared receiver 310. 311. As the infrared light receiving unit 310, an infrared ray ED or the like is used.

The control unit 303 controls the wireless unit 306 to receive image data transmitted from the computer apparatus 4 through wireless communication, and the projection unit 308 projects an image corresponding to the received image data. In addition, when the control unit 303 receives the wireless setting information from the remote control device 2 via the infrared reception unit 301, the control unit 303 sets the wireless unit 306 in an operating state and then performs wireless communication with the computer device 4 via the wireless unit 306. The wireless unit 306 is put into a non-operating state when the state in which it is determined whether or not the wireless communication with the computer apparatus 4 is not in a certain state continues.

[0263] Here, the setting of wireless information in the image projection device 3 'will be specifically described with reference to the drawings. FIG. 24 is a flowchart of an example of basic operations in the image projector 3 ′.

[0264] First, an example of a basic operation in the image projection device 3 'will be described with reference to FIG.

As shown in FIG. 24, the control unit 303 of the image projection device 3 ′ determines whether or not an activation command is received from the remote operation device 2 (step S200 ′). This determination continues until an activation command is received (step S200 ': NO). When an activation command is received (step S200': YES), the control unit 303 determines whether the light source 321 or LCD323 of the projection unit 308 Start operation. At this time, the control unit 303 maintains the state where the wireless unit 306 is stopped.

[0266] Next, the control unit 303 passes the elapsed time storage area set in the internal RAM. The interval is initialized and returned to 0 (step S201 ′), and the process proceeds to step S202 ′.

[0267] In step S202 ', the control unit 303 determines whether or not the wireless setting information is received from the remote control device 2 via the infrared line receiving unit 301. If it is determined in this process that the wireless setting information has been received (step S202 ′: YES), the received wireless setting information is stored in the nonvolatile memory 304 and the wireless function is turned on (step S203 ′). In other words, the control unit 303 operates the wireless unit 306 to enable wireless communication with the computer device 4. Thereafter, when the control unit 303 receives image data from the computer device 4 via the wireless unit 306 until the operation of the wireless unit 306 is stopped, the control unit 303 controls the projection unit 308 according to the received image data. The projected image is projected onto the screen (projection plane).

Next, the control unit 303 starts counting up the elapsed time (step S204 ′). That is, the control unit 303 starts a process of incrementing the elapsed time in the elapsed time storage area every predetermined time (for example, 1 second), and proceeds to the process of step S205 ′.

[0269] In step S205 ', the control unit 303 stores the elapsed time in the elapsed time storage area and acquires the elapsed time. Thereafter, the control unit 303 determines whether or not a wireless connection is being established between the wireless unit 306 and the computer apparatus 4 (step S206 ′). In this process, if it is determined that the wireless connection is being established (step S206 ′: YES), the control unit 303 resets the elapsed time stored in the elapsed time storage area and returns it to 0 (step S207 ′). ). On the other hand, if it is determined that the wireless connection is not in progress (step S206 ′: NO), the control unit 303 stores the time in the elapsed time storage area and the elapsed time exceeds a predetermined time (for example, 1 hour). It is determined whether or not the power is high (step S 208).

[0270] If it is determined in step S208 'that the elapsed time does not exceed the predetermined time (step S208': NO), the control unit 303 returns the process to step S204 '. On the other hand, if it is determined that the elapsed time exceeds the predetermined time (step S208 ′: YES), the control unit 303 turns off the wireless function (step S209 ′). That is, the control unit 303 stops the operation of the wireless unit 306 and proceeds to the process of step S210 ′.

In step S210 ′, the control unit 303 discards (clears) the wireless setting information stored in the nonvolatile memory 304. [0272] When the process of step S210 'ends, the control unit 303 determines whether or not a shutdown command has been received from the remote control device 2 (step S211'). If control unit 303 determines that a shutdown command has been received (step S211 ': YES), it terminates this process while receiving a shutdown command and determines that! /, NA! / (Step S211 ': NO), Step S200' will also repeat the process.

[0273] As described above, when the control unit 303 of the image projection device 3 'in the other embodiment [1] receives the wireless setting information from the remote operation device 2 via the infrared reception unit 301, the control unit 303 The wireless unit 306 determines whether it is in wireless communication with the computer device 4 via the wireless unit 306 and then determines that it is not in wireless communication with the computer device 4! /. Put 306 in a non-operating state. Therefore, when there is no communication between the computer device 4 and the image projection device 3 ′ for a predetermined period or longer, it can be determined that one presentation has been completed, so the key number can be changed for each presentation. Become.

[0274] It should be noted that the wireless unit 306 may be operated regardless of the state in which the wireless unit 306 is not wirelessly connected as described above. For example, after receiving the shutdown command of step S211 ′ without performing the processing of step S201 ′ and step S204 ′ to step S210 ′, the wireless setting information is discarded (the same processing as step S210 ′), and further wirelessly. Set the function to OFF (same as step S209 ').

[0275] (Computer device 4)

The configuration of the computer device 4 in the other embodiment [1] is the same as the configuration of the computer device 4 shown in FIG.

[0276] Here, an example of a basic operation of setting wireless information in the computer apparatus 4 of the other embodiment [1] will be described. FIG. 25 is a flowchart showing the wireless information setting operation in the computer apparatus 4, and is controlled by the CPU 405 that is a control unit of the computer apparatus 4.

[0277] As shown in FIG. 25, the CPU 405 of the computer apparatus 4 determines whether or not the wireless device 1 'is connected (step S300). Determining whether wireless device 1 'is connected Determines whether or not a USB device is connected to the USB connector 401, and when the USB device is further connected, determines whether or not the USB device has specific identification information.

[0278] In this process, when it is determined that the wireless device 1 'has been inserted (step S300: YES), the CPU 405 starts an autorun operation process (step S301). This auto-run operation process is performed in the same manner as S220 to S227 in FIG. 14 described above. On the other hand, if the wireless device 1 ′ is not inserted (step S300: NO), the process of step S300 is executed repeatedly.

[0279] When the auto-run operation process ends, the CPU 405 determines whether or not the image transfer application is normally activated (step S302). In this process, if the CPU 405 determines that the image transfer application is normally activated (step S302: YES), the process proceeds to step S303. Hereinafter, the operations from Steps S303 to S309 are realized by the CPU 405 operating as an image transmission application by operating according to the image transfer application.

[0280] In step S303, the CPU 405 requests the lighting of the image transfer in progress lamp 151 of the wireless device 1 via the USB connector 401. Upon receiving this lighting request, the CPU 101 of the wireless device 1 ′ lights the image transfer lamp 151.

Next, the CPU 405 transmits image data corresponding to the screen (hereinafter referred to as “display screen”) displayed on the LCD 403 that is the display unit of the computer apparatus 4 to the image projection apparatus 3 ′. Start (step S304). In this process, the CPU 405 power display image data is transmitted to the wireless device 1 ′ via the USB connector 401, and this wireless device 1 ′ force is also transmitted to the image projection device 3 ′ by wireless communication. When the image projection device 3 ′ receives the display image data transmitted to the screen, an image based on the display image data is projected on the screen.

[0282] With the display image data being transmitted in this manner, the CPU 405 performs a timeout process (step S305). This timeout process is the process of S330 to S334 in FIG. 26 and will be described later.

[0283] When this timeout process is completed, the CPU 405 determines whether or not the valid time has elapsed. (Step S306). This determination is a determination that the effective time has passed in step S331, which will be described later, and a determination that the effective time has passed and that the determination is “!

[0284] In this process, when it is determined that the valid time has passed! /, NA! / (Step S306: NO), the CPU 405 removes the wireless device 1 'from the computer apparatus 4. It is determined whether or not (step S307). In this process, if it is determined that the wireless device 1 is removed from the computer device 4 (step S307: YES), the CPU 405 displays an error message on the LCD 403 (step S308) and terminates the execution of the image transfer application. (Step S309). On the other hand, when it is determined that the wireless device 1 ′ has not been removed from the computer apparatus 4 (step S307: NO), the CPU 405 moves the process to step S305.

[0285] When the image transfer application is not operating normally in step S302 (step S302: NO), or when it is determined in step S306 that the valid time has passed (step S306: YES), the process of step S309 is executed. When the process ends, the CPU 405 ends this process.

[0286] Next, the timeout process in step S305 will be described with reference to FIG. FIG. 26 is a flowchart of timeout processing in the computer apparatus 4.

[0287] In this timeout process, the CPU 405 first requests time information (current time information) from the image projection device 3 ', and in response to this request, the CPU 405 uses the time information transmitted from the image projection device 3'. (Step S330), and the process proceeds to step S331. As described above, the current time information of the remote control device 2 and the current time information of the image projection device 3 ′ are synchronized.

[0288] In step S331, the CPU 405 determines whether or not the valid time has elapsed. Whether or not the valid time has elapsed is determined based on the time information acquired from the image projection device 3 ′ and the wireless setting information read from the wireless device 1 ′. In other words, it is determined whether or not the valid time has elapsed, whether or not the current time acquired from the image projection device 3 ′ is later than the valid time included in the wireless setting information read from the wireless device 1 ′. Judgment by

[0289] In this process, if it is determined that the valid time has passed (step S331: YES), CP The U405 displays a timeout message on the LCD 403 (step S332), and disconnects the wireless connection with the image projection apparatus 3 ′ (step S333). For disconnection of the wireless connection with the image projection apparatus 3 ′, the CPU 405 transmits a request for disconnection of the wireless connection with the image projection apparatus 3 ′ to the wireless device 1 ′, and the wireless device 1 ′ responds to this request. Is done by. When the disconnection of the wireless connection is completed, the CPU 405 ends the execution of the image transfer application (step S334).

[0290] Even if the valid time has not elapsed, if the CPU 405 determines that the predetermined time (for example, 5 minutes) has passed before the valid time, the valid time is extended before the valid time elapses. As shown, the LCD 403 displays that the effective time is approaching. Instead of or together with the display on the LCD 403, the CPU 405 transmits information indicating that the effective time is approaching to the image projection apparatus 3 ′ via the wireless device 1 ′, and the image projected from the image projection apparatus 3 ′. Information indicating that the effective time is approaching may be superposed on the image.

[0291] When it is determined in step S331 that the valid time has not elapsed (step S331)

: NO) Or, when the process of step S334 is completed, the CPU 405 ends the timeout process.

[0292] As described above, in the image projection system S 'of the other embodiment [1], the wireless device 1' has the wireless unit 306 and displays an image corresponding to the image data received by the wireless unit 306. The image to be projected functions as a wireless unit of the computer device 4 that transmits image data to the projection device 3 ′ by wireless communication. The wireless device 1 ′ has a USB connector 105 that can be connected to either the image projection device 3 ′ or the computer device 4, and the image projection device 3, when the USB connector 105 is connected to the image projection device 3 ′. The wireless setting information (wireless communication setting information) can be written from “,” and the wireless setting information written from the image projection device 3 ′ when the USB connector 105 is connected to the computer device 4 is stored in the computer device 4 When the USB connector 105 is connected to the computer device 4 and the flash memory 104 that can be read out by the wireless communication device 104, the wireless communication of the image projection device 3 ′ is performed based on the wireless setting information written from the image projection device 3 ′. Since the wireless communication unit 107 that communicates with the unit 306 is provided, communication between the image projection device 3 ′ and the computer device 4 is performed based on the wireless setting information set by the image projection device 3 ′. A highly sensitive wireless device that can be It is possible to provide a shadow system s'.

[0293] (Another embodiment of image projection system S '[2])

In the above embodiment, the force described for the example in which the wireless setting information is written from the remote control device 2 to the wireless device 1 ′ via the USB connectors 105 and 201. Here, the image projection system As another embodiment [2] of S ′, an embodiment will be described in which the wireless setting information is written from the remote control device 2 ′ to the wireless device 1, by wireless communication that transmits and receives wireless signals. Here, infrared communication for transmitting and receiving infrared signals will be described as an example of wireless communication. Further, in the above embodiment, when the wireless device 1 ′ ′ is connected to the remote operation device 2 or when the start control button 231 of the remote operation device 2 is operated, the wireless operation device 2 updates the wireless setting information. Described here is the operation when the setting is made to update the wireless setting information when the update button 232 is operated.

Here, as shown in FIG. 27, the wireless device 1 ′ ′ is a wireless device provided with an infrared receiving unit 113 (corresponding to an example of a wireless receiving unit). The infrared receiving unit 113 includes an infrared receiving unit 114 that receives an infrared signal transmitted from the remote control device 2, and an infrared control unit 115 that notifies the CPU 101 of the infrared signal received by the infrared receiving unit 114. ing. As described above, the wireless device 1 ′ has the infrared receiving unit 113 so that the infrared signal transmitted from the remote control device 2 is received by the infrared receiving unit 113 and notified to the computer device 4. To work. An infrared LED or the like is used as the infrared light receiving unit 114. Since the configuration of the wireless device 1 is not different except that the control program stored in the ROM 103 is partially different, the description thereof is omitted. Further, the remote operation device 2 ′ is not different from the configuration of the remote operation device 2 except that the control program stored in the secondary storage device 211 is partially different, and therefore the description of the configuration is omitted.

First, the operation of the remote control device 2 ′ will be specifically described with reference to the drawings. FIG. 28 is a flowchart showing an example of the operation of the remote control device 2 ′.

As shown in FIG. 28, first, the CPU 210 of the remote control device 2 ′ determines whether or not an ID issue command is detected (step S140 ′). Here, whether or not the ID issue command has been detected is determined by whether or not the CPU 210 has detected the update button 232 (see FIG. 17). [0297] In step S140 ', when the ID issue command is detected, the CPU 210 updates the wireless setting information (step S141'). This process is the same as the process shown in the flowchart of FIG.

Next, the CPU 210 controls the display unit 207 to perform a display for prompting the setting of the ID issuance permission number. The user operates the left and right arrow keys 234 and 235 and the decision key 236 according to the display on the display unit 207 to set the ID issuance permission number. The setting of the ID issuance permission number is stored in a predetermined area of the secondary storage device 211 by the CPU 210 (step S142 ′). Thus, the CPU 210 functions as a write count setting unit that sets the number of writes that can write the same wireless setting information to the device.

Next, CPU 210 determines whether or not wireless information setting button 239 arranged on operation unit 108 has been detected (step S143 ′). The wireless information setting button 239 is detected by determining whether or not the user has operated the wireless information setting button 239 by the CPU 210.

[0300] If it is determined in this process that the wireless information setting button 239 has been detected (step S143 ': YES), the CPU 210 updates the number of issued same wireless setting information (step S143'). S144 '). That is, the CPU 210 increments the number of the same wireless setting information issued. This issued number is initialized and set to “0” during the process of step S142 ′. On the other hand, if the wireless information setting button 239 is not detected (step S 143 ′: NO), the process of step S 143 ′ is repeatedly executed.

Next, CPU 210 determines whether or not the number of issued wireless setting information exceeds the issuance permission number set in step S 142 ′ (step S 145 ′). In this process, if it is determined that the number of issued wireless setting information exceeds the permitted number of issuances! /, NA! / (Step S 145 ′: NO), the CPU 210 performs secondary storage. The wireless setting information stored in 211 is taken out, and this wireless setting information is transmitted as an infrared ray signal from the infrared transmitter 203 to the wireless device 1 ′ ′ (step S146 ′). As described above, the CPU 210 does not update the wireless setting information until the number of issuances permitted (number of writings) set in the secondary storage device 211 is exceeded. On the other hand, if it is determined that the number of issued IDs exceeds the number of IDs permitted to be issued (step S 145 ′: YES), the CPU 210 stores the CPU 210 in the secondary storage device 211. The stored wireless setting information is discarded (cleared) (step S147 '), and the setting is information indicating that the wireless device 1''has reached the permitted number of issued wireless setting information. A notification exceeding the permitted number is transmitted (step S 148 ′). Note that the transmission of steps S 146 ′ to S 148 ′ is performed by the CPU 210 transmitting these pieces of information as infrared signals from the infrared transmission unit 203.

[0302] As described above, the remote control device 2 transmits the wireless setting information every time the wireless information setting button 239 is operated until the set number of issuance permission is exceeded. Wireless setting information can be written to each of a plurality of computer devices 4 connected with 1 ''.

Next, the operation of the computer apparatus 4 ′ to which the wireless device 1 ′ ′ is connected will be specifically described with reference to the drawings. FIG. 29 is a flowchart showing an example of the operation of the computer apparatus 4 ′. Note that the processing in steps S340 to S349 in FIG. 29 is the same as the processing in steps S300 to S309 in FIG. 25, so only S350 to S354 will be described. In step S342, whether or not the image transfer application has started normally is determined based on whether wireless setting information is set and image data can be transferred to the image projection apparatus 3 ′ by the image transfer application. Judge by whether or not.

[0304] In step S342, if the CPU 405 determines that the image transfer application has started normally! /, N! / (Step S342: NO), the infrared signal from the remote control device 2 is a wireless device 1. It is determined whether or not it has been received by the infrared receiving unit 113 (step S35 0).

[0305] If it is determined in this process that an infrared signal has been received (step S350: YES), the CPU 405 determines whether the infrared signal is wireless setting information (step S35 Do) If it is determined that the signal is wireless setting information (step S351: YES), the CPU 405 updates the wireless setting information of wireless device 1 (step S354), that is, the wireless signal received in step S351. Based on the setting information, it operates the wireless device 1. On the other hand, if it is determined that the infrared signal is not the wireless setting information (step S3 51: NO), the CPU 405 receives it in step S350. Infrared signal exceeds the set number. It is determined whether it is a notification (step S352).

[0306] If it is determined in step S352 that the setting permission number has been exceeded (step S352: YES), the CPU 405 displays an error message indicating that wireless communication cannot be set (step S353).

[0307] When the processing of Steps S353 and S354 is completed, when an infrared signal is received in Step S350 and it is determined that the signal is incorrect (Step S350: NO), the infrared signal is sent to Step S351! When it is determined that is wireless setting information (step S351: YES), when it is determined in step S352 that it is not a notification that the number of permitted settings has been exceeded! / (Step S352: NO), CP U405 ( Also, the process proceeds to step S342.

[0308] Although some of the embodiments of the present invention have been described in detail with reference to the drawings, these are examples, and other modifications and improvements have been made based on the knowledge of those skilled in the art. It is possible to carry out the present invention in the form.

For example, the communication based on the USB standard has been described between the wireless device, the image projection apparatus, and the computer apparatus, but the present invention is not limited to this, and the communication may be performed based on another communication standard.

[0310] In addition, the wireless device can use a wireless unit of a force computer device provided with a wireless communication unit. In this case, the wireless device can function as a wireless communication unit. The deleted device can be used.

Claims

The scope of the claims

[1] An image projection device that has a wireless unit that receives image data transmitted from an external computer device by wireless communication, projects an image according to the image data, and remotely controls the operation of the image projection device An image projection system comprising a remote operation device and a device including a wireless device communicably connected to the image projection device or the remote operation device and the computer device,

The image projection device or remote control device is

Means for generating wireless setting information necessary for wireless communication between the image projection device and the computer device;

Means for writing the wireless setting information to the device,

The device is

Means for outputting the wireless setting information written by the image projection device or the remote control device to the computer device;

An image projection system characterized by that.

[2] An image projection device that has a wireless unit and projects an image according to image data received by the wireless unit, a computer device that transmits the image data to the image projection device, and a wireless device of the computer device In an image projection system comprising a wireless device that functions as a

The wireless device is

A connector connectable to both the image projection device and the computer device; and the wireless communication setting information can be written from the image projection device when the connector is connected to the image projection device; and A wireless setting information storage unit capable of reading the wireless communication setting information written from the image projection device by the computer device when the connector is connected to the computer device;

A wireless communication unit that communicates with a wireless unit of the image projection device according to settings based on the wireless communication setting information written from the image projection device when the connector is connected to the computer device;

An image projection system comprising:

[3] A wireless device that has a wireless unit and functions as a wireless unit of a computer device that wirelessly transmits the image data to an image projection device that projects an image according to image data received by the wireless unit. There,

A wireless device comprising:

4. The apparatus according to claim 3, further comprising: a program storage unit that stores a program that causes the computer device to function as an image transmission unit that transmits image data to the image projection device via the wireless communication unit. The described wireless device.

[5] An image transmission stop operation unit that instructs to stop the transmission operation of the image data to the image projection device,

When the image transmission stop operation unit is operated, the image transmission unit transmits a request for causing the image projection device to project a specific image to the image projection device via the wireless communication unit. The wireless device according to claim 4, wherein:

6. The wireless device according to claim 3, wherein the wireless communication setting information includes an effective time for causing the wireless communication unit to function.

7. The wireless device according to claim 6, further comprising an effective time extending means for extending the effective time stored in the wireless setting information storage unit.

[8] The image transmission means includes

When it is determined that the effective time has passed based on the time information transmitted to the image projection apparatus and the effective time stored in the wireless setting information storage unit, the function of the wireless communication unit is stopped. The wireless device according to claim 6.

[9] An image projection device that has a wireless unit and projects an image according to image data received by the wireless unit, a computer device that transmits the image data to the image projection device, and a wireless device of the computer device In the image projection apparatus in an image projection system comprising a wireless device that functions as a unit,

The image projector is

A connection part to which a connector of the wireless device can be connected;

A control unit that writes the setting information of the wireless communication in the wireless setting information storage unit of the wireless device when the wireless device is connected to the connection unit;

An image projection apparatus comprising:

[10] The control unit includes:

When the wireless device is connected to the connection unit, the operation of the wireless unit is stopped for a predetermined period.

The image projector according to claim 9, wherein:

[11] The control unit includes:

When the wireless device is connected to the connection unit when the power of the image projection apparatus is turned on, the wireless communication setting information is written in the wireless setting information storage unit of the wireless device.

The image projector according to claim 9, wherein:

[12] The wireless device includes a write instruction operation unit for instructing a wireless setting information storage unit of the wireless device to write the wireless communication setting information.

The controller is

When the write instruction operation unit is operated, the wireless communication setting information is written to the wireless setting information storage unit of the wireless device.

The image projector according to claim 9, wherein:

[13] The control unit includes:

10. The wireless communication setting information is not written to the wireless device setting information storage unit when it is determined that the identification information of the wireless device is not specific identification information! / The image projection apparatus described.

[14] The wireless communication setting information includes an encryption key for the wireless communication, and before the wireless communication setting information is written in the wireless setting information storage unit of the wireless device, A setting information generation unit for generating at least the encryption key;

The image projector according to claim 9, wherein:

[15] The setting information generator

Each time the image projector is turned on, at least the encryption key is generated and updated in the wireless communication setting information.

15. The image projecting device according to claim 14, wherein

[16] An update instruction operation unit that instructs an operation of generating and updating at least the encryption key in the setting information of the wireless communication,

The setting information generation unit

Each time the update operation unit is operated, at least the encryption key of the wireless communication setting information is generated and updated.

15. The image projecting device according to claim 14, wherein

[17] The setting information generation unit includes:

When at least a predetermined period of time during which communication with the computer apparatus is not performed via the wireless unit is greater than or equal to a predetermined period, at least the encryption key is generated and updated in the wireless communication setting information

15. The image projecting device according to claim 14, wherein

[18] The wireless communication setting information includes an effective period for functioning a wireless communication unit in the wireless device,

The setting information generation unit generates the valid period

15. The image projecting device according to claim 14, wherein

[19] An image projection device that has a wireless unit that receives image data transmitted from an external computer device by wireless communication, projects an image according to the image data, and remotely controls the operation of the image projection device An image projection system comprising a remote operation device and a device capable of communication connection even when the computer device and the remote operation device are misaligned. And

The remote control device is:

A wireless setting information generating unit that generates wireless setting information necessary for wireless communication between the image projection device and the computer device;

A wireless setting information writing unit for writing the wireless setting information to the device at a predetermined timing;

A notification unit for notifying the image projection device of wireless setting information written in the device;

The device is

A controller that outputs the wireless setting information written by the remote control device to the computer device;

An image projection system characterized by that.

[20] The remote control device includes:

A connector for connecting to the device;

The wireless setting information writing unit

Write the wireless setting information to the device via the connector

20. The image projection system according to claim 19, wherein:

[21] The wireless setting information generation unit includes:

The image projection system according to claim 20, wherein the wireless setting information is updated when the device is connected to the connector.

22. The image projection system according to claim 20, wherein the predetermined timing is when it is detected that the device is connected to the connector.

[23] The remote control device includes a wireless transmission unit that transmits a wireless signal, and the device includes a wireless reception unit that receives a wireless signal from the remote control device,

The wireless setting information writing unit

The wireless setting information is written to the device by transmitting the wireless setting information to the device by a wireless signal. 20. The image projection system according to claim 19, wherein:

[24] The remote control device includes:

A start control instruction unit for instructing start and / or stop of the image projection device,

The wireless setting information generation unit

20. The image projection system according to claim 19, wherein the wireless setting information is updated when the activation control instruction unit is operated.

[25] The predetermined timing is when the activation control instruction unit is operated.

25. The image projection system according to claim 24.

[26]

A connector connected to the computer device;

A wireless communication unit that communicates with the wireless unit of the image projection device by setting based on the wireless setting information written from the remote control device when the connector is connected to the computer device;

A program storage unit that stores a program that causes the computer device to execute a function as an image transmission unit that transmits image data to the image projection device via the wireless communication unit.

20. The image projection system according to claim 19, wherein:

[27] The wireless setting information includes an effective time for causing the wireless communication unit to function.

When the image transmission means determines that the effective time has elapsed, the image transmission means stops the function of the wireless communication unit.

27. The image projection system according to claim 26.

[28] The image projection device comprises:

A wireless reception unit that receives a wireless signal from the remote control device; and when the wireless setting information is received from the remote control device via the wireless reception unit, the wireless unit is set in an operating state, and then the wireless unit A control unit that determines whether or not wireless communication is being performed with the computer device via the network, and that when the state that is determined not to be wireless communication with the computer device continues for a certain state, , Have

20. The image projection system according to claim 19, wherein:

[29] The remote control device includes:

A write number setting unit for setting the number of times that the same wireless setting information can be written to the device by the wireless setting information writing unit;

The wireless setting information generation unit updates the wireless setting information when the wireless setting information writing unit exceeds the number of times of writing.

20. The image projection system according to claim 19, wherein:

[30] The remote control device includes:

An update suppressing unit that suppresses updating of the wireless setting information by the wireless setting information generating unit;

When the wireless setting information generation unit detects that the update suppression unit is operated, the wireless setting information generation unit does not update the wireless setting information.

20. The image projection system according to claim 19, wherein:

[31] An image projection device that has a wireless unit that receives image data transmitted from an external computer device by wireless communication, projects an image according to the image data, and remotely controls the operation of the image projection device In the remote operation device described above in an image projection system comprising a remote operation device and a device connectable to both the computer device and the remote operation device.

A remote control device comprising: a notification unit that notifies the image projection device of wireless setting information written to the device.