JP2008171128A - Theft preventing system, projector and theft preventing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a theft preventing system capable of reducing the time and effort of a user when preventing theft of a projector and of adequately preventing theft of the projector. <P>SOLUTION: An authentication information supply device 200 is constituted by a storage part 220 which stores authentication information 222, and a supply side communication part 210 which transmits the authentication information 222 to the projector 100 through a power line 400. The projector 100 is constituted by a projector side communication part 110 which receives the authentication information 222 through the power line 400, a determination part 130 which determines permission/rejection of use of the projector 100 based on the authentication information 222, and a control part 140 which controls to start the projector 100 when determining permission of use and which controls not to start the projector when determining rejection of use of the projector 100. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projector antitheft system, a projector, and an antitheft method.

  A conventional general projector stores a verification password therein, and performs control to start up when the password input by the user matches the verification password. However, in this case, it is necessary for the user to input the password every time the projector is used, which is troublesome.

  In order to solve such a problem, Japanese Patent Laid-Open No. 2006-209199 sets a monitoring area, determines whether or not the current position of the projector is outside the monitoring area, and warns when the position is outside the monitoring area. It also describes that the projection is stopped. However, in this case, all projectors need to be equipped with hardware for detecting the current position, which complicates the process and increases the cost.

Japanese Patent Application Laid-Open No. 2004-234117 describes connecting a power supply device and an authentication server using a power line LAN.
JP 2006-209199 A JP 2004-234117 A

  However, in the method disclosed in Japanese Patent Application Laid-Open No. 2004-234117, it is necessary for the user to perform authentication by inputting an ID and a password.

  An object of the present invention is to provide a theft prevention system, a projector, and a theft prevention method capable of reducing the trouble of a user when preventing theft of the projector and appropriately preventing theft of the projector.

  In order to solve the above-described problem, the anti-theft system according to the present invention includes an authentication information providing apparatus, and the anti-theft system including at least one projector connected to the authentication information providing apparatus via a power line. The information providing apparatus includes a storage unit that stores authentication information, and a providing-side communication unit that transmits the authentication information to the projector via the power line, and the projector transmits the authentication information to the power line. A projector-side communication unit that receives the projector, a determination unit that determines whether the projector is permitted based on the authentication information, and a determination that permits the use of the projector by the determination unit. The projector is controlled so as to be activated, and when the determination unit determines to reject the use of the projector, Characterized in that it comprises a control unit for controlling so as not to start the Ekuta, the.

  In addition, a projector according to the present invention includes a projector-side communication unit that receives authentication information from an authentication information providing apparatus via a power line, a determination unit that determines whether the projector is permitted based on the authentication information, and the determination The projector is controlled to be activated when it is determined that the use of the projector is permitted, and the projector is not activated when the determination unit rejects the use of the projector. And a control unit for controlling the operation.

  The anti-theft method according to the present invention is an anti-theft method using at least one projector and an authentication information providing apparatus connected via a power line, wherein the authentication information providing apparatus is configured to send authentication information to the anti-theft method. Transmitting to the projector via a power line, the projector including a projector side communication unit, a determination unit, and a control unit, the projector side communication unit receives the authentication information via the power line. The determination unit determines whether or not to allow the use of the projector based on the authentication information, and the control unit starts the projector when the determination unit determines that the use of the projector is permitted. Control to prevent the projector from starting when the determination unit determines that the use of the projector is rejected. And wherein the Rukoto.

  According to the present invention, since the anti-theft system or the like does not require the user to input an ID or the like, it is possible to reduce the trouble of the user when preventing the theft of the projector. In addition, according to the present invention, the anti-theft system or the like can limit the place where the projector can be used by determining whether or not the projector can be used by using the authentication information transmitted via the power line. Proper anti-theft becomes possible.

  In addition, the authentication information providing device includes a timer unit, the storage unit includes provision time data indicating a time zone or a period in which the authentication information is transmitted, and the providing-side communication unit includes a timer value of the timer unit. And the authentication information may be transmitted based on the provision time data when the time zone or the time period falls.

  According to this, the anti-theft system or the like can limit the usable time zone or the like of the projector by limiting the transmission time zone or the like of the authentication information, so that the projector can be appropriately prevented from being stolen.

  In addition, the projector-side communication unit transmits request information indicating a request for providing the authentication information. When the providing-side communication unit receives the request information, the projector-side communication unit transmits information specific to the projector that is the transmission source of the request information. The authentication information including may be transmitted.

  According to this, the anti-theft system or the like can limit the projectors that can be used by using the authentication information including information unique to the projector, and can appropriately prevent the anti-theft of the projector.

  The antitheft system may include a blocking filter connected to the power line.

  According to this, since the anti-theft system or the like can prevent the authentication information from leaking to the outside by the blocking filter, it is possible to appropriately prevent the theft of the projector.

  Hereinafter, a case where the present invention is applied to a theft prevention system for a projector will be described as an example with reference to the drawings. In addition, the Example shown below does not limit the content of the invention described in the claim at all. In addition, all the configurations shown in the following embodiments are not necessarily essential as means for solving the invention described in the claims.

  FIG. 1 is a functional block diagram of an anti-theft system 10 in the present embodiment. The anti-theft system 10 includes a projector 100, an authentication information providing device 200, and a blocking filter 300. The projector 100, the authentication information providing apparatus 200, and the blocking filter 300 are connected via a power line 400.

  In addition, the authentication information providing apparatus 200 includes a storage unit 220 that stores authentication information 222, provision time data 224, and the like, a providing-side communication unit 210 that transmits the authentication information 222 and the like to the projector 100 via the power line 400, The timer unit 230 is included.

  The projector 100 also includes a projector-side communication unit 110 that receives the authentication information 222 via the power line 400, a determination unit 130 that determines whether the projector 100 is permitted based on the authentication information 222, and a verification used for the determination. When the storage unit 120 that stores the data 122 and the like and the determination unit 130 determine that the use of the projector 100 is permitted, the projector 100 is controlled to be activated, and the determination unit 130 rejects the use of the projector 100. When the determination is made, the control unit 140 is configured to control so that the projector 100 is not activated.

  Note that, for example, the following may be employed as hardware for implementing the functions of these units. For example, the projector-side communication unit 110 and the storage unit 120 include a PLC (Power Line Communications) modem, the storage units 120 and 220 include a flash ROM, the determination unit 130, the control unit 140 includes a CPU, and the timer unit 230. A system timer or the like may be employed.

  Further, the blocking filter 300 has a function of blocking information flowing through the power line 400 so as not to flow to the external power line 402, and a filter commonly used in power line communication may be employed. .

  Next, an anti-theft procedure for the projector 100 using these units will be described. FIG. 2 is a flowchart showing an anti-theft procedure in the present embodiment. It is assumed that the verification data 122 and the authentication information 222 include the same password for authentication.

  The determination unit 130 determines whether there is an instruction to start the projector 100 by the user (for example, pressing a power switch, etc.) (step S1).

  When there is an activation instruction for the projector 100, the projector-side communication unit 110 transmits request information indicating a request for providing the authentication information 222 to the authentication information providing apparatus 200 (step S2).

  The providing side communication unit 210 receives the request information (step S3), and transmits the authentication information 222 to the projector 100 (step S4). In the present embodiment, information is transmitted toward a transmission destination apparatus, but transmission using a broadcast method in which a transmission partner is not specified may be used. In the broadcast method, transmission / reception of request information can be omitted.

  The determination unit 130 determines whether the authentication information 222 has been received by the projector-side communication unit 110 (step S5). Note that the determination unit 130 may determine whether the authentication information 222 has been received within a certain time (for example, 30 seconds, 1 minute, etc.) after the request information is transmitted.

  When the authentication information 222 is received, the determination unit 130 determines whether or not the password included in the authentication information 222 matches the verification password included in the verification data 122 (step S6). The determination unit 130 determines whether or not the projector 100 can be used by determining whether or not the passwords match.

  If it is determined that the passwords match, the control unit 140 activates the projector 100 by, for example, driving the power supply of the projector 100 (step S7).

  On the other hand, if it is determined that the passwords do not match, the control unit 140 does not start the projector 100, for example, the projector 100 cannot be started by controlling the image processing unit of the projector 100 to project the notification image. The user is notified (step S8). Note that the control unit 140 notifies the user that the projector 100 cannot be activated in the same manner even when the authentication information 222 is not received (step S8).

  As described above, according to the present embodiment, since the anti-theft system 10 does not require the user to input an ID or the like, it is possible to reduce the trouble of the user when the anti-theft of the projector 100 is attempted. Further, according to the present embodiment, the anti-theft system 10 can limit the places where the projector can be used by determining whether or not the projector can be used by using the authentication information 222 transmitted through the power line 400. Therefore, it is possible to prevent the projector 100 from being properly stolen.

  Specifically, for example, even if the thief tries to take the projector 100 to the outside and uses it, the authentication information 222 cannot be acquired, and therefore the thief cannot activate the projector 100.

  Further, according to the present embodiment, by providing the blocking filter 300, it is possible to prevent the authentication information 222 from leaking to the outside, and thus the projector 100 can be appropriately prevented from being stolen.

  In addition, application of this invention is not limited to the Example mentioned above, A various deformation | transformation is possible. For example, the authentication information providing apparatus 200 uses the provision time data 224 indicating the time zone (for example, 9:00 to 17:00) or the period (for example, Monday to Friday) of transmitting the authentication information 222. You may limit a provision time zone.

  Specifically, for example, the providing-side communication unit 210 transmits the authentication information 222 based on the timer value of the timer unit 230 and the providing time data 224 only when it corresponds to the time zone or period of the providing time data 224. Also good.

  According to this, since the anti-theft system 10 can limit the usable time zone of the projector 100 by limiting the transmission time zone of the authentication information 222, the anti-theft of the projector 100 can be appropriately prevented. become. Further, the anti-theft system 10 can improve convenience when the projector 100 is lent out or used in a conference room or the like by limiting the transmission time zone of the authentication information 222 or the like.

  In addition, the projector-side communication unit 110 transmits request information including information unique to the projector 100 (for example, a serial number), and the providing-side communication unit 210 receives the request information, the source of the request information The authentication information 222 including information unique to the projector 100 (for example, a unique password, a serial number, etc.) may be transmitted.

  According to this, the anti-theft system 10 can limit the projectors 100 that can be used by using the authentication information including information unique to the projector 100, and can appropriately prevent the anti-theft of the projector 100.

  In the above-described embodiment, the anti-theft system 10 uses a password as the verification data 122 and the authentication information 222. However, for example, a signal having a specific pattern may be used.

  Further, the notification method when the projector 100 is not activated is not limited to the above-described method using the notification image. For example, a method of lighting a warning LED or the like, a method of notifying by voice, or the like may be employed. .

  As the projector 100, for example, a liquid crystal projector, a CRT (Cathode Ray Tube) projector, a projector using a DMD (Digital Micromirror Device), or the like may be used. DMD is a trademark of Texas Instruments Incorporated.

It is a functional block diagram of a theft prevention system in a present Example. It is a flowchart which shows the anti-theft procedure in a present Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Antitheft system, 100 Projector, 110 Projector side communication part, 120, 220 Storage part, 122 Collation data, 130 Judgment part, 140 Control part, 200 Authentication information provision apparatus, 210 Providing side communication part, 222 Authentication information, 224 Provision Hour data, 230 timer section, 300 blocking filter, 400, 402 power line

Claims (6)

In an anti-theft system including an authentication information providing apparatus and at least one projector connected to the authentication information providing apparatus via a power line,
The authentication information providing device includes:
A storage unit for storing authentication information;
A providing communication unit that transmits the authentication information to the projector via the power line;
Including
The projector is
A projector-side communication unit that receives the authentication information via the power line;
Based on the authentication information, a determination unit that determines whether or not to use the projector;
When the determination unit determines to permit use of the projector, the projector is controlled to start. When the determination unit determines to reject use of the projector, the projector is started. A control unit for controlling so as not to
An anti-theft system characterized by including: The anti-theft system according to claim 1,
The authentication information providing device includes a timer unit,
The storage unit includes provision time data indicating a time zone or a period for transmitting the authentication information,
The anti-theft system according to claim 1, wherein the providing communication unit transmits the authentication information based on the timer value of the timer unit and the provision time data when the time corresponds to the time period or the period. The anti-theft system according to any one of claims 1 and 2,
The projector-side communication unit transmits request information indicating a request for providing the authentication information,
When the providing side communication unit receives the request information, the providing side communication unit transmits the authentication information including information unique to a projector as a transmission source of the request information. In the antitheft system according to any one of claims 1 to 3,
An anti-theft system comprising a blocking filter connected to the power line. A projector-side communication unit that receives authentication information from the authentication information providing apparatus via a power line;
Based on the authentication information, a determination unit that determines whether or not to use the projector;
When the determination unit determines to permit use of the projector, the projector is controlled to start. When the determination unit determines to reject use of the projector, the projector is started. A control unit for controlling so as not to
Including a projector. In a theft prevention method using at least one projector and an authentication information providing apparatus connected via a power line,
The authentication information providing device transmits authentication information to the projector via the power line,
The projector includes a projector-side communication unit, a determination unit, and a control unit,
The projector-side communication unit receives the authentication information via the power line,
The determination unit determines whether or not to use the projector based on the authentication information,
The control unit controls to start the projector when the determination unit permits the use of the projector, and when the determination unit determines to reject the use of the projector An anti-theft method characterized in that the projector is controlled not to be activated.

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